PLASTIC CASE CIRCUIT BREAKER

Abstract

 The invention relates to the field of low-voltage electrical appliances, in particular to a moulded case circuit breaker comprising an circuit breaker body including an operating mechanism, and an electric operating device including a handle drivingly matched with the electric operating device, wherein said electric operating device includes a rotary disk that is rotatably set, a cam and a sliding block that are set on the rotary disk, and a slide rail for limiting and guiding the sliding block, said sliding block includes a driven groove of sliding block and a driving groove of sliding block, the cam is drivingly matched with the driven groove of sliding block, and the handle is inserted in the driving groove of sliding block, the rotary disk rotates and drives the sliding block to reciprocate along the sliding rail through the cam, and the sliding block drives the handle to swing through the driving groove of sliding block driving, so as to switch in/switch off the moulded case circuit breaker. The invention provides a moulded case circuit breaker, the sliding block of which has a simple, firm and reliable structure, and can significantly improve the reliability of the electric operating device.

Description

TECHNICAL FIELD OF THE INVENTION

[0001] The invention relates to the field of low-voltage electrical appliances, in particular to a moulded case circuit breaker.

DESCRIPTION OF THE PRIOR ART

[0002] The existing moulded case circuit breakers mostly have the following problems:

I. In the existing moulded case circuit breakers, as the sliding block of the electric operating device thereof has two detachable guide plates, when switching-off and switching-in, the cam coordinates with the two guide plates respectively to drive the sliding block to move. As for the sliding block, the structure is complex and the height is high, so displacement or separation will occur during long-term switching-off and switching-in, which will ultimately affect the reliability of the product.

II. When switching-off, the existing moulded case circuit breakers cannot be locked in or the locking reliability is not high, it can still detect the signal for automatic switching-in, so the safety is low.

III. Cage-type binding posts are generally used in the existing moulded case circuit breakers, so the cage-type binding posts cannot be completely contained in the base when lowering the height of the base, resulting in reducing creepage distance.

IV. In the arc-extinguishing chamber of the existing moulded case circuit breakers, gas is not discharged smoothly, which affects the breaking performance and electricity safety.

SUMMARY OF THE INVENTION

[0003] An object of the present invention is to overcome the limitation and problem of the prior art by providing a moulded case circuit breaker, the sliding block of which has a simple, firm and reliable structure, and can significantly improve the reliability of the electric operating device.

[0004] To achieve the above object, the present invention adopts the following technical solution:

A moulded case circuit breaker comprising: a circuit breaker body 1 and an electric operating device 2, said circuit breaker body 1 includes an operating mechanism 3, said operating mechanism 3 includes a handle 30 that is driven with said electric operating device 2,

wherein said electric operating device 2 includes a rotary disk 25-5 that is rotatably set, a cam 25-6 and a sliding block 26-0 that are set on the rotary disk 25-5, and a sliding rail 26-1 limiting and guiding the sliding block 26-0, said sliding block 26-0 includes a driven groove of sliding block 26-00 and a driving groove of sliding block 26-01, the cam 25-6 is matched with the driven groove of sliding block 26-00 by driving, and the handle 30 is inserted in the driving groove of sliding block 26-01,

the rotary disk 25-5 rotates and drives the sliding block 26-0 to reciprocate along the sliding rail 26-1 through the cam 25-6, and the sliding block 26-0 drives the handle 30 to swing through the driving groove of sliding block 26-01, so as to switch in/switch off the moulded case circuit breaker.

[0005] Preferably, the electric operating device 2 further includes the motor 25-3, the transmitting gear set 25-4, and the main transmitting shaft 25-0, the main transmitting shaft 25-0 is connected with the rotary disk 25-5 by driving and drives the rotary disk 25-5 to rotate,
the driven groove of sliding block 26-00 is arranged on one end of the sliding block 26-0, and the driving groove of sliding block 26-01 is arranged in the middle of the sliding block 26-0, the driven groove of sliding block 26-00 and the driving groove of sliding block 26-01 are located on both sides of the sliding block26-0 respectively, said driving groove of driving block 26-01 includes a driving side of switching-in 26-011 and a driving side of switching-off 26-010 which are arranged opposite each other and matched with the handle 30 by driving.

[0006] Preferably, said moulded case circuit breaker further includes a fourth microswitch 22-4, the sliding block includes a triggering structure of sliding block 26-02, When said moulded case circuit breaker is in the switching-in state, the sliding block 26-0 is located at the position for switching-in, the triggering structure of sliding block 26-02 drives the fourth microswitch 22-4 to switch in, when the moulded case circuit breaker is in the switching-off state, the sliding block 26-0 is located at the position for switching-off, and the trigger structure of sliding block 26-02 is far away from the fourth microswitch 22-4 to make it switch off,
the electric operating device 2 further includes a reset spring of sliding block, the reset spring of sliding block is connected with the sliding block 26-0, so as to provide a pulling force for the sliding block 26 in the same direction as the sliding direction that the sliding block 26-0 drives the moulded case circuit breaker to switch off.

[0007] Preferably, said moulded case circuit breaker also includes a locking device 6, the locking device includes a locking member 63 that is rotationally set, when the moulded case circuit breaker is in switching-off state, the sliding block 26-0 is located at the position for switching-off, and the locking member 63 is rotated to restrictively match with the sliding block 26-0 to prevent the sliding block 26-0 from sliding.

[0008] Preferably, when moulded case circuit breaker is in switching-in state, the sliding block 26-0 is located at the position for switching-in, and the locking member 63 is restrictively matched with the sliding block 26-0 to prevent the sliding part 63 from rotating.

[0009] Preferably, said locking member 63 includes the locking bump 631, and the locking bump 631 includes a locking bump surface 6310,
when said moulded case circuit breaker is in switching-off state, the locking member 63 is rotated to make the locking bump surface 6310 perpendicular to the sliding direction of the sliding block 26-0 and restrictively match with the sliding block 26-0 , so as to prevent the sliding block 26-0 from sliding, when sad moulded case circuit breaker is in the switching-in state, the locking bump surface 6310 is parallel to the sliding direction of the sliding block 26-0, and the sliding block 26-0 is restrictively matched with the locking bump surface 6310 to prevent the locking member 63 from rotating.

[0010] Preferably, said sliding block 26-0 includes a locking structure of sliding block 26-03, and the locking structure of sliding block 26-03 includes a first limiting side surface 26-030 and a first locking side 26-031 which are perpendicular to each other, the first limiting side 26-030 is restrictively matched with the locking bump surface 6310 to prevent the locking member 63 from rotating, and the locking bump surface 6310 is restrictively matched with the first locking side 26-031 to prevent the sliding block 26-0 from sliding.

[0011] Preferably, said electric operating device 2 further includes the indicating disk 25-1 that is set on the main transmitting shaft 25-0 of the electric operating device 2 to rotate coaxially with it, said moulded case circuit breaker also includes a switching push rod 24-0 which is slidably set and can block and dodge the main transmitting shaft 25-0,
said moulded case circuit breaker further includes a first microswitch 22-1, a second microswitch 22-2, a third microswitch 22-3, and a fourth microswitch 22-4, which are respectively a status indicating microswitch, a manual automatic switching microswitch, a locking microswitch and a reset microswitch, the first microswitch 22-1 is driven with the indicating disk 25-1, the second microswitch 22-2 is driven with the switching push rod 24-0, the third microswitch 22-3 is driven with the locking device 6, and the fourth microswitch 22-4 is driven with the sliding block 1.

[0012] Preferably, said electric operating device 2 further includes a device support 20-1and a sliding block support, the device support 20-1, the sliding block support and the circuit breaker body 1 are sequentially set and linked together, the sliding block 26-0 is set inside the sliding block support, the main transmitting shaft 25-0 of said electric operating device 2 is set in the middle of the device support 20-1, and the switching push rod 24-0 is slidably set on the device support 20-1 and is located above the main transmitting shaft 25-0, the locking device 6 is rotatably connected with the device support 20-1, the first microswitch 22-1, the second microswitch 22-2 and the third microswitch 22-3 are set on one side of the device support 20-1, and the fourth microswitch 22-4 is set on the other side of the device support 20-1, and the fourth microswitch 22-4 and the sliding block support are located on the same side of the device support 20-1.

[0013] Preferably, said circuit breaker body 1 includes a body shell 1a, and the body shell 1a includes s cover 10a and s base 11a that are joined together, the body shell 1a further includes at least one pole chamber, each of which is provided with one terminal cavity at both ends, each of the terminal cavities is provided with a connecting terminal, each of the terminal cavities is composed of an upper terminal cavity set on the cover 10a and a lower terminal cavity set on the base 11a, each of the connecting terminals includes a connecting frame, and both ends of each connecting frame are respectively set in the upper terminal cavity and lower terminal cavity of one terminal cavity, said moulded case circuit breaker further includes a terminal cover that is restrictively matched with the connecting frame one-to-one, each terminal cover includes two isolation side walls of terminal cover set opposite each other, and the two isolation side walls of terminal cover are respectively set on two sides of the connecting frame.

[0014] Preferably, each terminal cover further includes a limiting side wall of terminal cover, which is connected with two isolation side walls of terminal cover, respectively, the limiting side wall of the terminal cover is set on one side of the inner port of the connecting frame, and the two ends thereof are restrictively matched with the cover 10a and the base 11a.

[0015] Preferably, a connecting plate for connecting the connecting terminal and the internal circuit of the pole chamber is inserted in each of the connecting frames, the connecting plate is stacked on the bottom wall of the connecting frame, and the end of the limiting side wall of the terminal cover, restrictively matched with the base 11a , is pressed against the connecting plate.

[0016] Preferably, the connecting terminal includes a first connecting terminal 5-0 and a second connecting terminal 5-1, both ends of each pole chamber are respectively provided with the first terminal cavity and the second terminal cavity, the first connecting terminal 5-0 is set in the first terminal cavity, and the second connecting terminal 5-1 is set in the second terminal cavity, and the first connecting terminal 5-0 includes a first connecting frame 5-00, and the second connecting terminal 5-1 includes a second connecting frame 5-10, each of the pole chambers is also provided with an arc-extinguishing chamber 1-0, the air outlet of which is opposite the first connecting terminal 5-0, said terminal cover includes a first terminal cover 4-0 and a second terminal cover 4-1, which are restrictively matched with the first connecting terminal 5-0 and the second connecting terminal 5-1 respectively, said moulded case circuit breaker further includes a first connecting plate 5-03 and a second connecting plate 5-13, one end of the first connecting plate 5-03 is inserted in the first connecting frame 5-00, and one end of the second connecting plate 5-13 is inserted in the second connecting frame 5-10.

[0017] Preferably, the first terminal cover 4-0 includes two first isolation side walls of terminal cover 4-01 set opposite each other and one first limiting side wall of terminal cover 4-03, two first isolation side walls of terminal cover 4-01 are set on both sides of the first connecting frame 5-00, and the first limiting side wall of terminal cover 4-03 is respectively connected to the two first isolation side walls of terminal cover 4-01, and set on one side of the first connecting inner port of the first connecting frame 5-00, and the two ends are restrictively matched with the cover 10a and the base 11a, one end of the first limiting side wall of terminal cover 14-03 that is restrictively matched with the base 11a is pressed against the first connecting plate 5-03, and the other end of the first limiting side wall of terminal cover 4-03 protrudes from one side of the connecting frame 5-00 to form the arc extinguishing portion of terminal cover, which is provided with multiple gas-discharging holes 4-04,
the first terminal cover 4-0 further includes an arc-isolation plate 4-06 which is set on one side of the arc extinguishing portion of terminal cover away from the arc-extinguishing chamber 1- 0 to block the gas-discharging hole 4-04, the first terminal cover 4-0 also includes a first top wall of terminal cover 4-02, which is set on the upper side of the top wall of the first connecting frame 5-0, the connection between the first top wall of terminal cover 4-02 and the first limiting side wall of terminal cover 4-03 is provided with a limiting groove of isolation plate 4-05, in which one end of the arc-isolation plate 4-06 is inserted.

[0018] Preferably, the second terminal cover 4-1 includes two second isolation side walls of terminal cover 4-11 set opposite each other and one second limiting side wall of terminal cover 4-13, two second isolation side walls of terminal cover 4-11 are set on both sides of the second connecting frame 5-10, and the second limiting side wall of terminal cover 4-13 are respectively connected to two second isolation side walls of terminal cover 4-11, and set on one side of the second inner port of connecting frame of the second connecting frame 5-10, and the two ends are restrictively matched with the cover 10a and the base 11a, one end of the second limiting side wall of terminal cover 4-13 that is restrictively matched with the base 11a is pressed against the second connecting plate 5-13, and the other end of the second limiting side wall of terminal cover 4-13 is set close to the top wall of the second connecting frame 5-10.

[0019] Preferably, the circuit breaker body 1 further includes an arc-extinguishing chamber 1-0, a first connecting plate 5-03 and a first connecting frame 5-00, the arc-extinguishing chamber 1-0 includes a plurality of arc extinguishing grids set side by side, one end of the first connecting plate 5-03 is inserted into the first connecting frame 5-00, and another end passes through the middle of the arc-extinguishing chamber 1-0 to connect with the internal circuit of the pole chamber to divide the arc extinguishing grids into two parts.

[0020] Preferably, the static contact is set on the first connecting plate 5-03, the arc extinguishing grids is set on both sides of the static contact.

[0021] Preferably, said sliding block 26-0 is of integrated structure.

[0022] The moulded case circuit breaker of the invention has a reliable and firm structure of sliding block, which ensures the reliable operation of the electric operating device. In addition, the circuit board, the rotary disk, the sliding block and circuit breaker body are set in turn from top to bottom, and the circuit board is set on the side of the main transmitting shaft. The above layout firstly makes the structure of the moulded case circuit breaker more compact, and secondly, makes the circuit board far away from the circuit breaker body, so as to ensure the reliable operation of the electric operating device. In addition, the sliding block 26-0 and the sliding rail 26-1 are simple to assemble with reliable limit, which is beneficial to improving the production efficiency and reliability of the product. In addition, the sliding block is of integrated structure, which improves the structural reliability and stability of the sliding block.

[0023] In the moulded case circuit breaker of the invention, the locking device directly coordinates with the sliding block through the locking member, so that once the sliding block is locked, and the moulded case circuit breaker cannot perform switching-in, thereby ensuring the electricity safety of users. In addition, the sliding block is of integrated structure, and the structure is reliable and firm, which ensures the reliable operation of the electric operating device.

[0024] In the moulded case circuit breaker of the invention, the creepage distance can be significantly increased by setting the terminal cover to ensure the insulation between the pole chambers, and improve the safety of electrical appliances. In addition, the two ends of the limiting side wall of the terminal cover are restrictively matched with the cover and the base respectively to ensure the assembly reliability of the terminal cover, thereby preventing the creepage distance from decreasing caused by the terminal cover falling off.

BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 

FIG.1 is a schematic view of the moulded case circuit breaker of the present invention, at least showing the positional relation of the first microswitch, the second microswitch, and the third microswitch relative to the indicating disk, the switching push rod, and the locking device, , respectively.

FIG.2 is a schematic view of the moulded case circuit breaker of the present invention, at least showing the structure of the sliding-block support.

FIG.3 is a schematic view of the electric operating device of the present invention, where the moulded case circuit breaker is in the switching-in state.

FIG.4 is a schematic view of the electric operating device of the present invention, where the moulded case circuit breaker is in the switching-off state.

FIG.5 is a schematic view of transmitting relation of the main transmitting shaft, rotary disk, cam and sliding block in the present invention.

FIG.6 is a schematic view of the lower support of the present invention.

FIG.7 is a schematic view of the sliding block of the present invention.

FIG.8 is a schematic view of the electric operating device of the present invention, where the moulded case circuit breaker is in the switching-off state, and the driving bump of locking member of the locking device presses the driving rod of the third microswitch.

FIG.9 is a schematic view of the electric operating device of the present invention, where the moulded case circuit breaker is in the switching-off state, and the locking bump of the locking device is restrictively matched with the first locking side of the locking structure to prevent the sliding block from sliding.

FIG. 10 is a schematic view of the electric operating device of the present invention, where the moulded case circuit breaker is in the switching-in state, and the driving bump of locking member of the locking device releases the driving rod of the third microswitch.

FIG. 1 1 is a schematic view of the electric operating device of the present invention, where the moulded case circuit breaker is in the switching-in state, and the locking bump of the locking device is restrictively matched with the first limiting side of the locking structure to prevent the locking member from rotating.

FIG. 12 is a schematic view of the locking device of the present invention.

FIG. 13 is a schematic view of the locking member of the present invention.

FIG. 14 is a schematic view of the circuit breaker body of the present invention, at least showing the matching relation between the terminal cover and the connecting terminal.

FIG. 15 is a schematic diagram of the positional relation between the first terminal cover and the arc-extinguishing chamber in the present invention.

FIG. 16 is a schematic diagram of the positional relation between the first terminal cover and the first connecting terminal in the present invention.

FIG. 17 is a schematic diagram of the first terminal cover of the present invention.

FIG. 18 is a schematic diagram of the positional relation between the second terminal cover and the second connecting terminal in the present invention.

FIG. 19 is a schematic diagram of the second terminal cover of the present invention.

FIG.20 is a schematic view of the matching relation between the second connecting plate, the second terminal cover and the second connecting terminal in the present invention.

FIG. 21 is a schematic view of the base of the present invention.

FIG. 22 is a schematic view of the cover of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

[0026] The specific implementation of the moulded case circuit breaker of the present invention will be further described below with reference to the embodiments given in FIGS. 1-22. The moulded case circuit breaker of the present invention is not limited to the description of the following embodiments.

[0027] As shown in FIGS.1, 2 and 14, the moulded case circuit breaker of the present invention includes the circuit breaker body 1 including the body shell 1a, and the body shell 1a includes the cover 10a and the base 11a that are joined together. The body shell 1a further includes at least one pole chamber, each of which is provided with connecting terminals at both ends, and the middle of each pole chamber is provided with a movable contact and a static contact for matching use. The moulded case circuit breaker further includes the operating mechanism 3 drivingly connected to a movable contact in one pole chamber. The movable contact is an active contact, and the movable contacts in the other pole chamber are linked with the active contact. The operating mechanism 3 includes the handle 30, and the handle 30 is toggled to switch in/switch off the moulded case circuit breaker.

[0028] Preferably, as shown in FIGS. 2, 14-22, an improvement of the moulded case circuit breaker of the present invention is the following. Each of the terminal chambers is provided with a terminal cavity at both ends, and each terminal cavity is provided with a connecting terminal. Each of the terminal cavities is composed of an upper terminal cavity set on the cover 10a and a lower terminal cavity set on the base 11a. Each of the connecting terminals includes a connecting frame, and both ends of each connecting frame are respectively set in the upper terminal cavity and lower terminal cavity of one terminal cavity. The moulded case circuit breaker of the present invention further includes terminal covers that are restrictively matched with the connecting frame one-to-one. Each terminal cover includes two isolation side walls of terminal cover set opposite each other, and the two isolation side walls of terminal cover are respectively set on two sides of the connecting frame to improve insulation and separate the shell joint between the body shell 1a and the connecting frame. In the moulded case circuit breaker of the present invention, the creepage distance can be significantly increased by setting the terminal cover to ensure the insulation between the pole chambers, and improve the safety of electrical appliances.

[0029] As shown in FIGS. 2, 14-22, each of the terminal covers further includes a limiting side wall of terminal cover which is respectively connected to the two isolation side walls of terminal cover. The limiting side wall of terminal cover is set on one side of the first connecting inner port of the connecting frame, that is, the side close to the inside of the moulded case circuit breaker. The two ends of the limiting side wall of terminal cover are restrictively matched with the cover 10a and the base 11a to ensure the assembly reliability of the terminal cover, thereby preventing the creepage distance from decreasing caused by the terminal cover falling off. Further, as shown in FIGS. 2, 14-22, the connecting terminal includes the first connecting terminal 5-0 and the second connecting terminal 5-1. Both ends of each pole chamber are respectively provided with the first terminal cavity and the second terminal cavity. The first connecting terminal 5-0 is set in the first terminal cavity, and the second connecting terminal 5-1 is set in the second terminal cavity. The first connecting terminal 5-0 includes the first connecting frame 5-00, and the second connecting terminal 5-1 includes the second connecting frame 5-10. Each of the pole chambers is also provided with an arc-extinguishing chamber 1-0, the air outlet of which is opposite the first connecting terminal 5-0. The terminal cover includes the first terminal cover 4-0 and the second terminal cover 4-1, which are restrictively matched with the first connecting terminal 5-0 and the second connecting terminal 5-1 respectively. One end of the first connecting plate 5-03 of the first connecting terminal 5-0 is inserted into the first connecting frame 5-00, and the other end is connected to the internal circuit of the pole chamber. One end of the second connecting plate 5-13 of the second connecting terminal 5-1 is inserted into the second connecting frame 5-10, and the other end is connected to the internal circuit of the pole chamber. Further, as shown in FIGS. 14-17, the first terminal cover 4-0 includes two first isolation side walls of terminal cover 4-01 set opposite each other and one first limiting side wall of terminal cover 4-03. Two first isolation side walls of terminal cover 4-01 are set on both sides of the first connecting frame 5-00, and the first limiting side wall of terminal cover 4-03 is respectively connected to the two first isolation side walls of terminal cover 4-01, and set on one side of the first connecting inner port of the first connecting frame 5-00, and the two ends are restrictively matched with the cover 10a and the base 11a. One end of the first limiting side wall of terminal cover 14-03 that is restrictively matched with the base 11a is pressed against the first connecting plate 5-03, and the other end of the first limiting side wall of terminal cover 4-03 protrudes from one side of the connecting frame 5-00 to form the arc extinguishing portion of terminal cover, which is provided with multiple gas-discharging holes 4-04. The arc extinguishing portion of terminal cover can significantly improve the gas-discharging efficiency of the arc-extinguishing chamber inside the circuit breaker, which is beneficial to improve the arc-extinguishing effect of the arc-extinguishing chamber 1-0. As shown in FIGS. 15 and 17, the first terminal cover 4-0 includes the arc-isolation plate 4-06 which is set on one side of the arc extinguishing portion of terminal cover away from the arc-extinguishing chamber 1-0. The first terminal cover 4-0 also includes the first top wall of terminal cover 4-02, which is set on the upper side of the top wall of the first connecting frame 5-0. The connection between the first top wall of terminal cover 4-02 and the first limiting side wall of terminal cover 4-03 is provided with the limiting groove of isolation plate 4-05, in which one end of the arc-isolation plate 4-06 is inserted. In the moulded case circuit breaker of the present invention, one end of the arc-isolation plate 4-06 is limited, and at the other end a certain deformation will occur when arc-extinguishing and gas-discharging are performed in the arc extinguishing chamber 1-0, so that high-temperature gas can pass through the arc extinguishing portion of terminal cover and is discharged smoothly from circuit breaker, and the protection level and tightness of the moulded case circuit breaker are also guaranteed. In addition, when there is no arc-extinguishing chamber in the pole chamber of the moulded case circuit breaker of the present invention, the arc-isolation plate 4-06 can be set on the first terminal cover 4-0, which is beneficial to improve the protection effect.

[0030] What should be pointed out is that, as shown in FIGS 1 and 2, according to practical needs, the moulded case circuit breaker of the present invention also includes the electric operating device 2 including the sliding block 26-0 that coordinates with the handle 30 of the operating mechanism 3 in order to swing the handle 30 to switch in/switch off the moulded case circuit breaker.

[0031] Preferably, as shown in FIGS. 8-11, another improvement of the moulded case circuit breaker of the present invention is the following. The moulded case circuit breaker of the present invention also includes the locking device 6 including the locking member 63 that is rotationally set. As for the moulded case circuit breaker, when switching-off, the sliding block 26-0 is located at the position for switching-off, and the locking member 63 is rotated to restrictively match with the sliding block 26-0 to prevent the sliding block 26-0 from sliding, which is used to prevent the moulded case circuit breaker from being operated by mistake. Further, as shown in FIGS. 10 and 11, as for the moulded case circuit breaker, when switching-in, the sliding block 26-0 is located at the position for switching-in, and the locking member 63 is restrictively matched with the sliding block 26-0 to prevent the sliding part 63 from rotating, so the moulded case circuit breaker cannot be locked at this time. In the moulded case circuit breaker of the present invention, the locking device 6 is directly restrictively matched with the sliding block 26-0 through the locking member 63, so that once the sliding block 26-0 is locked, the moulded case circuit breaker cannot perform switching-in , thereby ensuring the user's electricity safety.

[0032] Preferably, as shown in FIGS. 4-7, another improvement of the moulded case circuit breaker of the present invention is the following. The sliding block 26-0 is of integrated structure, including the driven groove of sliding block 26-00 and the driving groove of sliding block 26-01, and the cam 25-6 of the electric operating device 2 drivingly coordinates with the driven groove of sliding block 26-00, and the handle 30 of the operating mechanism 3 is inserted in the driving groove of sliding block 26-01. As for the moulded case circuit breaker, the sliding block 26-0 is of integrated structure, and the structure is reliable and firm, which ensures the reliable operation of the electric operating device 2. As shown in FIG. 6, the moulded case circuit breaker of the present invention further includes a sliding rail 26-1 limiting and guiding the sliding block 26-0. The sliding rail 26-1 includes two strip rails parallel set opposite each other and set on both sides of the sliding block 26-0 respectively. The sliding block 26-0 includes the first rail block 26-050 and second rail block 26-051 set opposite each other, which limit the strip rail between the first rail block 26-050 and the second rail block 26-05. The sliding block 26-0 and the sliding rail 26-1 are simple to assemble with reliable limit, which is beneficial to improving the production efficiency and reliability of the product.

[0033] As shown in FIGS. 1, 2 and 14, it is an embodiment of the moulded case circuit breaker of the present invention.

[0034] As shown in FIGS.1, 2 and 14, the moulded case circuit breaker of the present invention includes the circuit breaker body 1 and the electric operating device 2. The circuit breaker body 1 includes the operating mechanism 3 including the handle 30, and the electric operating device 2 includes the sliding block 26-0 drivingly coordinating with the handle 30. The sliding block 26-0 slides back and forth to swing the handle 30 to switch in /switch off the moulded case circuit breaker. The circuit breaker body 1 also includes the body shell 1a including the cover 10a and the base 11a that are joined together. A plurality of pole chambers arranged side by side and spaced apart are set inside the body shell 1a, and both ends of each pole chamber are provided with one terminal cavity respectively, and one connecting terminal is set inside each terminal cavity. The middle of each of the pole chambers is provided with a movable contact and a static contact for coordinating application, and the arc-extinguishing chamber 1-0 that is used with the movable contact and the static contact. The operating mechanism 3 is drivingly connected with the movable contact of one of the pole chambers, which is an active contact, and the movable contacts of the other pole chambers are linked with the active contact. Multiple movable contacts can be set on the contact shaft with linkage.

[0035] Specifically, as shown in FIGS. 1, 2, and 14, the moulded case circuit breaker of the present invention is a three-pole circuit breaker, that is, the body shell 1 is provided with three pole chambers arranged side by side at intervals. The operating mechanism 3 is drivingly connected with the movable contact of the middle pole chamber, and the movable contacts of the pole chambers on both sides are linked with the movable contact of the middle pole chamber. The three movable contacts are all set on the same contact shaft, and the operating mechanism is drivingly connected with the contact shaft.

[0036] Preferably, as shown in FIGS. 1, 8-13\, the moulded case circuit breaker of the present invention further includes the locking device 6, when the moulded case circuit breaker is in switching-off state, the locking device 6 coordinates with the sliding block 26-0 to prevent the sliding block 26-0 from sliding.

[0037] As shown in Figures 1-11, it is an embodiment of the electric operating device 2.

[0038] Preferably, as shown in FIGS. 2-7, the electric operating device 2 includes the rotary disk 25-5 that is rotatably set, the cam 25-6 set on the rotary disk 25-5, the sliding block 26-0 with integrated structure, and the sliding rail 26-1 limiting and guiding the sliding block 26-0. The sliding block 26-0 includes the driven groove of sliding block 26-00 and the driving groove of sliding block 26-01. The cam 25-6 is drivingly matched with the driven groove of sliding block 26-00, and the handle 30 is inserted in the driving groove of sliding block 26-01. The rotary disk 25-5 rotates and drives the sliding block 26-0 to along the sliding rail 26-1 through the cam 25-6, and the sliding block 26-0 drives the handle 30 to swing through the driving groove of sliding block 26-01, so as to switch in/switch off the moulded case circuit breaker. Further, as shown in FIGS. 6 and 7, the driven groove of sliding block 26-00 is arranged on one end of the sliding block 26-0, and the driving groove of sliding block 26-01 is arranged in the middle of the sliding block 26-0. The driven groove of sliding block 26-00 and the driving groove of sliding block 26-01 are located on both sides of the sliding block26-0 respectively, that is, located on the upper and lower sides of sliding block 26-0 (front and back). Further, as shown in FIG. 7, the driving groove of driving block 26-01 includes the driving side of switching-in 26-011 and the driving side of switching-off 26-010 which are arranged opposite each other and drivingly matched with the handle 30, so it is beneficial to improve the reliability of coordination between the sliding block 26-0 and the handle 30.

[0039] Specifically, in the direction shown in FIGS. 3 and 4, the driven groove of sliding block 26-00 is arranged at the upper right end of the sliding block 26-0, and the driving groove of sliding block 26-01 is arranged at the lower middle side of the sliding block 26-0. The rotary disk 25-5 rotates and can drive the sliding block 26-0 to slide left and right through the cam 25-6 and the driven groove of sliding block 26-00, and the sliding block 26-0 drives the handle 30 to swing left and right, thereby realizing switching of the moulded case circuit breaker between switching-in state and switching-off state.

[0040] Preferably, as shown in FIGS. 1-3, the electric operating device 2 further includes the motor 25-3, the transmitting gear set 25-4, and the main transmitting shaft 25-0. The main transmitting shaft 25-0 is drivingly connected with the rotary disk 25-5 and drives the rotary disk 25-5 to rotate.

[0041] Preferably, as shown in FIGS. 6-11, the moulded case circuit breaker further includes the fourth microswitch 22-4, which is a reset microswitch, and the sliding block 26-0 is integrally formed as a square structure, including the triggering structure of sliding block 26-02 set at one of its top corners. When the moulded case circuit breaker is in the switching-in state, the sliding block 26-0 is located at the position for switching-in, the triggering structure of sliding block 26-02 drives the fourth microswitch 22-4 to switch in, and the fourth microswitch 22-4 transmits the switching-in signal to the circuit board 21 of the electric operating device 2. When the moulded case circuit breaker is in the switching-off state, the sliding block 26-0 is located at the position for switching-off, and the trigger structure of sliding block 26-02 is far away from the fourth microswitch 22-4 to make it switch off. When the moulded case circuit breaker is in the dropping-out state, the triggering structure of sliding block 26-02 is also far away from the fourth microswitch 22-4 to make it switch off. Further, as shown in FIGS. 6 and 7, the electric operating device 2 further includes a reset spring of sliding block (not shown in the figure), and the triggering structure of sliding block 26-02 of the sliding block 26-0 is provided with the connecting hole of sliding block spring26-06. One end of the reset spring of sliding block is connected with the connecting hole of sliding block spring 26-06, and the other end is fixed, so as to provide a pulling force for the sliding block 26 in the same direction as the sliding direction that the sliding block 26-0 drives the moulded case circuit breaker to switch off.

[0042] Specifically, as shown in FIG. 9, the moulded case circuit breaker is in the switching-off state, and the sliding block 26-0 is located at the lower position (switching-off position), so the triggering structure of sliding block 26-02 far away from the fourth microswitch 22-04, no longer is pressed against the driving rod of the fourth microswitch 22-4, so as to make the fourth microswitch 22-4 switch off. As shown in FIG. 11, the moulded case circuit breaker is in the switching-in state, and the sliding block 26-0 is located at the upper position (the switching-in position), the triggering structure of sliding block 26-02 is pressed against the driving rod of the fourth microswitch 22-4 , so as to make the fourth microswitch 22-4 switch in.

[0043] Preferably, as shown in FIGS. 7, 9, and 11, the sliding block 26-0 further includes the locking structure of sliding block 26-03.When the moulded case circuit breaker is in the switching-off state, the sliding block 26-0 is located at the switching-off position, and the locking member 63 is rotated to be restrictively matched with the locking structure of sliding block 26-03 , which can prevent the sliding block 26-0 from sliding and avoid switching-in by mistake. When the moulded case circuit breaker is in the switching-in state, the sliding block 26-0 is located at the switching-in position, and the locking structure of sliding block 26-03 is restrictively matched with the locking member 63 to prevent the locking member 63 from rotating, so the circuit breaker cannot be locked now.

[0044] Preferably, as shown in FIG. 6, the sliding rail 26-1 includes two strip rails parallel set opposite each other and set on both sides of the sliding block 26-0 respectively. As shown in FIG. 6, the sliding block 26-0 includes the first rail block 26-050 and second rail block 26-051 set opposite each other, which limit the strip rail between the first rail block 26-050 and the second rail block 26-05. Specifically, in the direction shown in FIG. 7, the left and right sides of the rail block 26-0 are provided with the first rail block 26-050 and the second rail block 26-051, which are alternately located on the same side, that is, the gap between two adjacent second track blocks 26-051 is opposite the first track block 26-050, and the gap between two adjacent first track blocks 26-050 is opposite the second track block 26 -051. The left and right sides of the slider 26-0 are opposite one strip rail respectively, and each strip rail is limited between the first first rail block 26-050 and the second rail block 26-051.

[0045] Preferably, as shown in FIG. 1, the electric operating device 2 further includes the circuit board 21 connected to the motor 25-3 to provide working power and control signals for the motor 25-3.Further, as shown in FIG. 1, the circuit board 21, the rotary disk25-5, the sliding block 26-0 and circuit breaker body1 are set in turn from top to bottom, and the circuit board 21 is set on the side of the main transmitting shaft 25-0. The above layout firstly makes the structure of the moulded case circuit breaker more compact, and secondly, makes the circuit board 21 far away from the circuit breaker body 1, so as to ensure the reliable operation of the electric operating device 2.

[0046] Preferably, as shown in FIGS. 2-6, the electric operating device 2 further includes the sliding block support, and the sliding block 26-0 is set in the middle of the sliding block support. The sliding block support includes the upper support 20-3 and the lower support 20-2 that are set opposite each other. The upper support 20-3 includes the main board of upper support 20-30, and the firth arm of upper support 20-31 and the second arm of upper support 20-32 that are bent to connect with both ends of the main board of upper support 20-30, respectively. The free ends of the first arm of upper support 20-31 and the second arm of upper support 20-32 are both provided with the limiting bump of upper support 20-33. The lower support 20-2 includes the main board of lower support 20-20, and the first arm of lower support 20-21 and the second arm of lower support 20-22 that are bent to connect with both ends of the main board of lower support 20-20, respectively. The connection between the main board of lower support 20-20 and the first arm of lower support 20-21, and the connection between the main board of lower support 20-20 and the second arm of lower support 20-22 are both provided with the limiting hole of lower support 20-23. The main board of upper support 20-30 is opposite the main board of lower support 20-20, and the first arm of upper support 20-31 and the first arm of lower support 20-21 are stacked together to form the first side wall of support, and the second arm of upper support 20-32 and the second arm of lower support 20-22 are stacked together to form the second side wall of support. The first arm of upper support 20-31 and the second arm of upper support 20-32 are located between the first arm of lower support 20-21 and the second arm of lower support 20-22, and each limiting bump of upper support 20-33is inserted in one limiting hole of lower support 20-23. Further, as shown in FIGS. 2 and 6, both ends of the strip rail of the sliding rail 26-1 are fixedly connected to the first side wall of support and the second side wall of support, respectively.

[0047] Preferably, as shown in FIGS. 6 and 8, the sliding block support further includes the dodging hole of support 20-4 arranged on the first side wall of support. When the moulded case circuit breaker is in the switching-off state, the free end of the locking structure of sliding block 26-03 of the sliding block 26-0 is inserted in the dodging hole of support 20-4.

[0048] Preferably, as shown in FIGS. 2 and 3, the electric operating device 2 further includes the supporting plate 20-5, and the supporting plate 20-5 is set with the main board of upper support 20-30 in parallel and at intervals. The transmitting gear set 25-4 is set between the supporting plate 20-5 and the main board of upper support 20-30, and the main transmitting shaft 25-0 is rotatably connected with the supporting board 20-5 and the main board of upper support 20-30 , respectively.

[0049] Specifically, as shown in FIGS. 2, 3, and 6, the upper support 20-3 and the lower support 20-4 are both formed by bending and punching metal plates, and both are of U-shaped structures. The supporting plate 20-5, the upper support 20-3, and the lower support 20-2 are set in turn from top to bottom, and the lower support 20-2 is fixedly connected to the body shell 1a.

[0050] Preferably, as shown in FIGS. 1-3, the electric operating device 2 further includes the indicating disk 25-1 that is set on the main transmitting shaft 25-0 to rotate coaxially with it, and the indicating disk 25-1 is used to indicate the switching-in/ switching-off state of moulded case circuit breaker. The moulded case circuit breaker also includes a switching push rod 24-0 which is slidably set and can block and dodge the main transmitting shaft 25-0. Further, as shown in FIGS. 1-3, the moulded case circuit breaker also includes the first microswitch 22-1 and the second microswitch 22-2, which are respectively a status indicating microswitch and a manual automatic switching microswitch. The first microswitch 22-1 drivingly coordinates with the indicating disk 25-1, and the second microswitch 22-2 drivingly coordinates with the switching push rod 24-0. Specifically, as shown in FIG. 1, when the switching push rod 24-0 blocks the main transmitting shaft 25-0, the user cannot use the turning rod to operate the main transmitting shaft 25-0, and the switching push rod 24-0 is far away from the second microswitch 22-2, so the second microswitch 22-2 switches in. When the switching push rod 24-0 dodges the main transmitting shaft 25-0, the user can use the turning rod to operate the main transmitting shaft 25-0, and the switching push rod 24-0 is pressed against the driving rod of the second microswitch 22-2, so the micro switch 22-2 switches off. The second micro switch 22-2 is connected to the driving circuit of the motor 25-3, at this time, the motor cannot be used for automatic switching-in/switching-off, so manual automatic switching is realized. Specifically, as shown in FIG. 5, the indicating disk 25-1 includes two semicircles, and one semicircle has a radius larger than that of another semicircle. When the semicircle with small radius is opposite the first microswitch 22-1, the driving rod of the first microswitch 22-1 is released. When the semicircle with large radius is opposite the first microswitch 22-1, the driving rod of the first micro switch 22-1 is pressed. Thereby, the first micro switch 22-1 is switched between on and off, and is used to transmit an electrical signal indicating switching-in /switching-off to the circuit board 21 of the electric operating device 2, the state (switching-in, switching-off , dropping-out) of the moulded case circuit breaker can be determined in combination with the signals transmitted by the first microswitch 22-1 and the fourth microswitch 22-4.

[0051] Preferably, as shown in Figures 1, 8, and 10, the electric operating device 2 further includes the device support 20-1. The device support 20-1, the sliding block support and the circuit breaker body 1 are sequentially set and linked together. The main transmitting shaft 25-0 is set in the middle of the device support 20-1, and the switching push rod 24-0 is slidably set on the device support 20-1 and is located above the main transmitting shaft 25-0. The locking device 6 is rotatably connected with the device support 20-1. The first microswitch 22-1 and the second microswitch 22-2 are set on one side of the device support 20-1, and the fourth microswitch 22-4 drivingly coordinating with the sliding block 26-0 is set on the other side of the device support 20-1, and the fourth microswitch 22-4 and the sliding block support are located on the same side of the device support 20-1. Specifically, in the direction shown in FIG. 1, the device support 20-1, the sliding block support, and the circuit breaker body 1 are set in turn from top to bottom and linked together in sequence. The first microswitch 22-1 and the second microswitch 22-2 are set on the upper side of the device support 20-1, and the fourth microswitch 22-4 is set on the lower side of the device support 20-1.

[0052] As shown in FIGS. 8-13, it is an embodiment of the locking device 6.

[0053] Preferably, as shown in FIGS. 8-11, the locking device 6 includes the locking member 63 that is rotationally set. As for the moulded case circuit breaker, when switching-off, the sliding block 26-0 is located at the position for switching-off, and the locking member 63 is rotated to restrictively match with the sliding block 26-0 to prevent the sliding block 26-0 from sliding. As for the moulded case circuit breaker, when switching-in, the sliding block 26-0 is located at the position for switching-in, and the locking member 63 is restrictively matched with the sliding block 26-0 to prevent the sliding part 63 from rotating.

[0054] Preferably, as shown in FIG. 13, the locking member 63 includes the locking bump 631, and the locking bump 631 includes the locking bump surface 6310. As shown in FIGS. 10 and 11, when the moulded case circuit breaker is in the switching-off state, the locking member 63 is rotated to make the locking bump surface 6310 perpendicular to the sliding direction of the sliding block 26-0 and restrictively match with the sliding block 26-0, so as to prevent the sliding block 26-0 from sliding, avoiding switching-in by mistake. As shown in FIGS. 8 and 9, when the moulded case circuit breaker is in the switching-in state, the locking bump surface 6310 is parallel to the sliding direction of the sliding block 26-0, and the sliding block 26-0 is restrictively matched with the locking bump surface 6310 to prevent the locking member 63 from rotating, so the sliding block 26-0 can not be limited. Further, as shown in FIG. 7, the sliding block 26-0 includes the locking structure of sliding block 26-03 including the first limiting side surface 26-030 and the first locking side 26-031 that are perpendicular to each other. The first limiting side 26-030 is restrictively matched with the locking bump surface 6310 to prevent the locking member 63 from rotating, and the locking bump surface 6310 is restrictively matched with the first locking side 26-031 to prevent the sliding block 26-0 from sliding.

[0055] Preferably, as shown in FIGS. 8 and 10, the moulded case circuit breaker of the present invention further includes the third microswitch 22-3, which is a locking microswitch, and drivingly matched with the locking device 6. Further, as shown in FIGS. 8, 10, and 13, the locking member 63 includes the driving bump of locking member 632, and the locking device 6 drivingly coordinates with the third microswitch 22-3 through the driving bump of locking member 632. Further, as shown in FIGS. 1, 8, and 10, the third microswitch 22-3, the first microswitch 22-1 and the second microswitch 22-2 are set on the same side of the device support 20-1.

[0056] Specifically, as shown in FIGS. 10 and 11, as for the moulded case circuit breaker of the present invention, when switching-in, the locking bump surface 6310 is parallel to the first limiting side 26-030 and both restrictively match with each other, so the locking member 63 cannot rotate and the sliding block 26-0 cannot be limited, at this time, the driving bump of locking member 632 is far away from the driving rod of the third microswitch 22-3. As shown in FIGS. 8 and 9, as for the moulded case circuit breaker of the present invention , when switching-off, after the locking member 63 has been rotated, the locking bump surface 6310 is parallel to the first locking side 26-031 and both restrictively match with each other, so the sliding block 26- 0 is limited and cannot slide to the switching-in position, at this time, the driving bump of locking member 632 is pressed against the driving rod of the third microswitch 22-3, and the third microswitch 22-3 provides the locking device 6 with the electrical signals determining whether or not to lock the switching-off state to forbid switching-in.

[0057] Preferably, as shown in FIG. 12, the locking device 6 includes a lock core 60, a washer 61, a positioning part 62 and a locking member 63. The device support 20-1 of the electric operating device 2 further includes the installation hole of locking device, which the positioning part 62 is inserted into, and one end of the locking device 6 is the socket end of the lock core 60, protruding from one side of the device support 20-1, and the outside of the end is provided with an annular bump. The annular bump and the washer 61 are respectively located on both sides of the device support 20-1 and respectively restrictively matched with the device support 20-1. The locking member 63 is set at the other end of the locking device 6 and linked with the lock core 60. Further, as shown in FIG. 13, the locking member 63 includes the cylindrical locking member body 630, and the driving bump and locking bump of locking member 632,631 that are set at both radial ends of the locking member body 630. The driving bump and locking bump of locking member 632,631 are also located at the two axial ends of the locking member body 630 respectively, and the middle of the locking member body 630 is provided with the fitting hole of locking member that is restrictively matched with the lock core 60.

[0058] Specifically, as shown in FIG. 12, the lock core 60 passes through the positioning part 62 and is drivingly connected to the locking member 63. The washer 61 is sleeved on the outside of the positioning part 62, and the positioning part 62 is provided with the limiting plane of positioning part, which is restrictively matched with the device support 20-1 to prevent the positioning part 62 and the lock core 60 from rotating together.

[0059] As shown in FIGS. 6 and 7, it is an embodiment of the sliding block 26-0.

[0060] As shown in FIGS.6 and 7, the slider 1 is of integrated structure as overall square block and includes the sliding block body, the driven groove of gliding block 26-00, the driving groove of sliding block 26-01, the triggering structure of sliding block 26-02, the first rail block 26-050 and the second rail block 26-051. The driven groove of sliding block 26-00 is set on one end of the sliding block body, and the driving groove of sliding block 26-01 is set in the middle of the sliding block body, and the driven groove of sliding block 26-00 and the driving groove of sliding block 26-01 are set on the front and back sides of slider body , respectively. A pair of side walls of the sliding block body are set opposite the two strip rails of the sliding rail 26-1 , respectively. A plurality of the first rail blocks 26-050 and the second rail blocks 26-051 are set at both ends of each side wall respectively, and the first rail block 26-050 and the second rail block 26-051 are set opposite each other and alternately arranged. The triggering structure of sliding block 26-02 is set at a top corner of the sliding block body, away from the driven groove of sliding block 26-00, and the triggering structure of sliding block 26-02 is provided with the connecting hole of sliding block spring 26-06. Further, as shown in FIG. 7, the driving groove of sliding block 26-01 includes the switching-in driving side 26-011 and the switching-off driving side 26-010 which are set opposite each other and drivingly matched with the handle 30 , respectively. Further, as shown in FIGS. 6 and 7, the sliding block 1 further includes the locking structure of sliding block 26-03, and the locking structure of sliding block 26-03 and the triggering structure of sliding block 26-02 are located on a pair of top corner of the sliding block body, respectively. Further, as shown in FIG. 7, the locking structure of sliding block 26-03 includes the first limiting side 26-030 and the locking side 26-031 that are perpendicular to each other.

[0061] Specifically, in the direction shown in FIG. 7, the left, right, top, and bottom sides of FIG.7 are the left, right, front, and back sides of the sliding block 26-0 respectively, and the sides of FIG.7 front-facing and back-facing the reader are the lower and upper side of slider 26-0 , respectively. The driven groove of sliding block 26-00 is set at the upper rear-end of the sliding block 26-0, and the driving groove of sliding block 26-01 is set at the lower middle part of the sliding block 26-0. The left and right sides of the slider body are provided with a plurality of first track blocks 26-050 and a plurality of second track blocks 26-051, respectively. The triggering structure of sliding block 26-02 is set at the left front-corner of the sliding block body, and the locking structure of sliding block 26-03 is set at the right rear-corner of the sliding block body. The front-and rear-ends of the driving groove of sliding block 26-01 are the switching-off driving side 26-010 and the switching-in driving side 26-011, respectively.

[0062] The terminal cover, the coordination of the terminal cover and the body shell 1a, and the coordination of the terminal cover and the connecting terminal are described in combination with FIGS. 1-2 and 14-22 as below.

[0063] As shown in FIGS. 1-2, 14, 21-22, each of the terminal cavities is composed of an upper terminal cavity set on the cover 10a and a lower terminal cavity set on the base 11a. Each of the connecting terminals includes a connecting frame, and both ends of each connecting frame are respectively set in the upper terminal cavity and lower terminal cavity of one terminal cavity. The moulded case circuit breaker of the present invention further includes terminal covers that are restrictively matched with the connecting frame one-to-one. Each terminal cover includes two isolation side walls of terminal cover set opposite each other, and the two isolation side walls of terminal cover are respectively set on two sides of the connecting frame to improve insulation and separate the shell joint between the body shell 1a and the connecting frame. Specifically, as shown in FIG. 1, the body shell 1a is formed by joining the cover 10a and the base 11a, between which the joint must have the gap (ie. shell joint, which not only includes the gap at the side wall of the body shell 1a, but also includes the joint of side wall between the pole chambers in the middle of the body shell 1a). As shown in FIGS. 2 and 14, when the connecting frame is installed in the terminal cavity, the lower part of connecting frame is located in the lower terminal cavity, and the upper part of connecting frame is located in the upper terminal cavity. In contrast to the gap between the base 11a, the creepage distance is reduced compared with the conventional structure in which the wiring frame is entirely submerged in the base, so the side walls of the connecting frame are opposite the gap between the cover 10a and the base 11a, and the creepage distance is reduced, compared with the traditional structure in which the connecting frame is entirely submerged in the base. In the moulded case circuit breaker of the present invention, the terminal cover increases the creepage distance, and the isolation side wall isolates the shell joint between the connecting frame and the body shell 1a, which improves the insulation of the moulded case circuit breaker and the electricity safety of users.

[0064] Preferably, as shown in FIGS. 15-22, each terminal cover further includes the limiting side wall of terminal cover, which is connected with two isolation side walls of terminal cover, respectively. The limiting side wall of the terminal cover is set on one side of the inner port of the connecting frame, and the two ends thereof are restrictively matched with the cover 10a and the base 11a to ensure the reliable installation of the terminal cover and prevent the terminal cover from falling off.

[0065] Preferably, as shown in FIGS. 15 and 20, a connecting plate for connecting the connecting terminal and the internal circuit of the pole chamber is inserted in each of the connecting frames. The connecting plate is stacked on the bottom wall of the connecting frame, and the end of the limiting side wall of the terminal cover, restrictively matched with the base 11a , is pressed against the connecting plate.

[0066] Specifically, as shown in FIGS. 2, 14-22, the connecting terminal includes the first connecting terminal 5-0 and the second connecting terminal 5-1. Both ends of each pole chamber are respectively provided with the first terminal cavity and the second terminal cavity. The first connecting terminal 5-0 is set in the first terminal cavity, and the second connecting terminal 5-1 is set in the second terminal cavity. The first connecting terminal 5-0 includes the first connecting frame 5-00, and the second connecting terminal 5-1 includes the second connecting frame 5-10. The air outlet of arc-extinguishing chamber 1-0 is opposite the first connecting terminal 5-0. The terminal cover includes the first terminal cover 4-0 and the second terminal cover 4-1, which are restrictively matched with the first connecting terminal 5-0 and the second connecting terminal 5-1 respectively. The connecting plate includes the first connecting plate 5-03 and the second connecting plate 5-13. One end of the first connecting plate 5-03 is inserted in the first connecting frame 5-00, and one end of the second connecting plate 5-13 is inserted in the second connecting frame 5-10.

[0067] Preferably, as shown in FIGS. 16 and 17, the first terminal cover 4-0 includes two first isolation side walls of terminal cover 4-01 set opposite each other and one first limiting side wall of terminal cover 4-03. Two first isolation side walls of terminal cover 4-01 are set on both sides of the first connecting frame 5-00, and the first limiting side wall of terminal cover 4-03 is respectively connected to the two first isolation side walls of terminal cover 4-01, and set on one side of the first connecting inner port of the first connecting frame 5-00, and the two ends are restrictively matched with the cover 10a and the base 11a. One end of the first limiting side wall of terminal cover 14-03 that is restrictively matched with the base 11a is pressed against the first connecting plate 5-03, and the other end of the first limiting side wall of terminal cover 4-03 protrudes from one side of the connecting frame 5-00 to form the arc extinguishing portion of terminal cover, which is provided with multiple gas-discharging holes 4-04.

[0068] Preferably, as shown in FIGS. 21 and 22, the first terminal cavity includes the first upper terminal cavity 101b set on the cover 10a and the first lower terminal cavity 101a set on the base 11a. One first lower limiting groove 102a is respectively set on both side walls of the inner end of the first lower terminal cavity 101a. One first upper limiting groove 102b with a U-shaped structure is set in the inner end of the first upper terminal cavity 101b. Two side edges of the lower end of the first limiting side wall of terminal cover 4-03 are respectively restrictively matched with the two first lower limiting grooves 102a, and two side edges and top edges of the upper end of the first limiting side wall of terminal cover 4-03 are respectively restrictively matched with the first upper limiting groove 102b.

[0069] Preferably, as shown in FIGS. 15-17, the first terminal cover 4-0 further includes the arc-isolation plate 4-06 which is set on one side of the arc extinguishing portion of terminal cover away from the arc-extinguishing chamber 1-0. Further, as shown in FIGS. 15-17, the first terminal cover 4-0 also includes the first top wall of terminal cover 4-02, which is set on the upper side of the top wall of the first connecting frame 5-0. The connection between the first top wall of terminal cover 4-02 and the first limiting side wall of terminal cover 4-03 is provided with the limiting groove of isolation plate 4-05, in which one end of the arc-isolation plate 4-06 is inserted.

[0070] Preferably, as shown in FIG.15, the arc-extinguishing chamber 1-0 includes a plurality of arc extinguishing grids set side by side. One end of the first connecting plate 5-03 is inserted into the first connecting frame 5-00, and another end passes through the middle of the arc-extinguishing chamber 1-0 to connect with the internal circuit of the pole chamber to divide the arc extinguishing grids into two parts. The static contact is set on the first connecting plate 5-03, and the arc extinguishing grids is set on both sides of the static contact.

[0071] Preferably, the first connecting terminal 5-0 further includes a first connecting screw 5-01. The first connecting screw 5-01 is threadedly connected to the top wall of the first connecting frame 5-00, and the first top wall of terminal cover 4-02 of the first terminal cover 4-0 is provided with the first dodging groove of terminal cover 4-020 used to dodge the first connecting screw 5-01.

[0072] Specifically, as shown in FIGS. 14-15, the upper end and lower end of the first limiting side wall of terminal cover 4-03 are restrictively matched with the cover 10a and the base 11a , and the part of the first limiting side wall of terminal cover 4-03 that protrudes from the upper side of the first connecting terminal 5-00 is the arc extinguishing portion of the terminal cover. The right end of the first connecting frame 5-00 is the inner port of the first connecting frame. The left end of the first connecting plate 5-03 is inserted into the first connecting frame 5-00, and stacked on the bottom wall of the first connecting frame 5-00, and the right end passes through the middle of the arc-extinguishing chamber 1-0 to connect with the internal circuit of the pole chamber. Multiple arc extinguishing grids of the arc-extinguishing chamber 1-0 are alternately set and parallel arranged in sequence from top to bottom. As shown in FIGS. 21 and 22, the lower end of the first lower terminal cavity 101a is its inner end (the end close to the middle of the pole chamber), and the lower end of the first upper terminal cavity 101b is its inner end (the end close to the middle of the pole chamber).

[0073] Preferably, as shown in FIGS. 18-22, the second terminal cover 4-1 includes two second isolation side walls of terminal cover 4-11 set opposite each other and one second limiting side wall of terminal cover 4-13. Two second isolation side walls of terminal cover 4-11 are set on both sides of the second connecting frame 5-10, and the second limiting side wall of terminal cover 4-13 are respectively connected to two second isolation side walls of terminal cover 4-11, and set on one side of the second inner port of connecting frame of the second connecting frame 5-10, and the two ends are restrictively matched with the cover 10a and the base 11a. One end of the second limiting side wall of terminal cover 4-13 that is restrictively matched with the base 11a is pressed against the second connecting plate 5-13, and the other end of the second limiting side wall of terminal cover 4-13 is set close to the top wall of the second connecting frame 5-10. Further, as shown in FIGS. 21 and 22, the second terminal cavity includes the second lower terminal cavity 103a set on the base 11a and the second upper terminal cavity 103b set on the cover 10a. One second lower limiting groove 104a is respectively set on both side walls of the inner end of the second lower terminal cavity 103a, and the second upper isolation wall 104b is set on the inner end of the second upper terminal cavity 103b. The two side edges of the lower end of the second limiting side wall of terminal cover 4-13 are respectively restrictively matched with the two second lower limiting grooves 104a , and the top side edge of the second limiting side wall of terminal cover 4-13 is pressed against the second upper isolation wall 104b. Further, as shown in FIG. 18, the second connecting terminal 5-1 further includes the second connecting screw 5-11, which is threadedly connected with the second connecting frame 5-10. The second terminal cover 4-1 also includes the second top wall of terminal cover 4-12, which is set on the upper side of the top wall of the second connecting frame 5-10. The second top wall of terminal cover 4-12 is provided with the second dodging groove of terminal cover 4-120 for avoiding the second connecting screw 5-11.

[0074] As shown in FIGS. 16 and 17, it is an embodiment of the first terminal cover 4-0.

[0075] As shown in FIGS. 16 and 17, the first terminal cover 4-0 includes two first isolation side walls of terminal cover 4-01 set opposite each other, one first limiting side wall of terminal cover 4-03, and one first top wall of terminal cover 4-02. The first top wall of terminal cover 4-02 and the two first isolation side walls of terminal cover 4-01 are integrated into a U-shaped structure, and the first limiting side wall of terminal cover 4-03 is set on the same side of the two first terminal cover isolation side wall 4-01 and the first top wall of terminal cover 4-02 and respectively connected with the three to form one first terminal cover cavity 4-00 for containing the first connecting frame 5-00. One end of the first limiting side wall of terminal cover 4-03 protrudes from the side of the first top wall of terminal cover 4-02 to form the arc acute portion of terminal cover, which is provided with a plurality of gas-discharging holes 4-04. The other end of the first limiting side wall of terminal cover 4-03 protrudes on the side of the first isolation side wall of terminal cover 4-01, and the middle of the first top wall of terminal cover 4-02 is provided with the the first dodging groove of terminal cover 4-020.

[0076] Preferably, as shown in FIGS. 16 and 17, the width of the part of the first limiting side wall of terminal cover 4-03 that is restrictively matched with the base 11a is larger than the width of the part of the first limiting side wall of terminal cover 4-03 that is restrictively matched with the cover 10a.

[0077] Preferably, as shown in FIG. 15, the first terminal cover 4-0 further includes the arc-isolation plate 4-06 which is set on one side of the arc extinguishing portion of terminal cover away from the arc-extinguishing chamber 1- 0 to block the gas-discharging hole 4-04. The connection between the first top wall of terminal cover 4-02 and the first limiting side wall of terminal cover 4-03 is provided with the limiting groove of isolation plate 4-05, in which one end of the arc-isolation plate 4-06 is inserted.

[0078] As shown in FIGS. 18 and 19, it is an embodiment of the second terminal cover 4-1.

[0079] As shown in FIGS. 18-22, the second terminal cover 4-1 includes two second isolation side walls of terminal cover 4-11 set opposite each other, one second limiting side wall of terminal cover 4-13 and one second top wall of thermal cover 4-12. The second top wall of terminal cover 4-12 and the two second isolation side walls of terminal cover 4-11 are integrated into a U-shaped structure, and the second limiting side wall of terminal cover 4-13 is set on the same side of the two second terminal cover isolation side wall 4-11 and the second top wall of terminal cover 4-12 and respectively connected with the three to form one second terminal cover cavity 4-10 for containing the second connecting frame 5-10. One end of the second limiting side wall of terminal cover 4-13 is connected to the second top wall of terminal cover 4-12 and set close to the top wall of the second connecting frame 5-10, and the other end of the second limiting side wall of terminal cover 4-13 protrudes from the side of the second isolation side wall of terminal cover 4-11, and the middle of the second top wall of terminal cover 4-12 is provided with the the second dodging groove of terminal cover 4-120.

[0080] Preferably, as shown in FIGS. 19 and 20, the width of the part of the second limiting side wall of terminal cover 4-13 that is restrictively matched with the base 11a is larger than the width of the other part of the second limiting side wall of terminal cover 4-13.

[0081] As shown in FIGS. 21 and 22, it is an embodiment of the body shell 1a.

[0082] As shown in FIGS. 21 and 22, the body shell 1a is composed of the base 11a and the cover 10a joined together. The middle of the body shell 1a is provided with three pole chambers arranged set side by side and alternately arranged. Each pole chamber is composed of the lower pole chamber set on the base 11a and the upper pole chamber set on the cover 10a. The side wall of pole chamber is set between adjacent pole chambers, and the side wall of pole chamber is composed of the side wall of lower pole chamber set on the base 11a and the side wall of upper pole chamber set on the cover 10a. The joint between the both wall forms a shell joint. Each of the pole chambers includes the first terminal cavity and the second terminal cavity set at both ends, and the arc-extinguishing chamber cavity set in the middle of the pole chamber. The arc-extinguishing chamber cavity is set close to the first terminal cavity and passed toward it. The first terminal cavity includes the first lower terminal cavity 101a set on the base 11a and the first upper terminal cavity 101b set on the cover 10a. The second terminal cavity includes the second lower terminal cavity 102a set on the base 11a and the second upper terminal cavity 103b set on the cover 10a. The arc extinguishing chamber cavity includes the lower arc-extinguishing chamber cavity 100a set on the base 11a and the upper arc-extinguishing chamber cavity 100b set on the cover 10a. The first lower limiting groove 102a is each set on both side walls of the connection between the first lower terminal cavity 101a and the lower arc-extinguishing chamber cavity 100a, and the first upper limit groove 102b with a U-shaped structure is set at the connection between the first upper terminal cavity 101b and the upper arc-extinguishing chamber 100b. The second lower limiting groove 104a is each set at the two side walls of the second lower terminal cavity 103a close to one end of the lower arc-extinguishing chamber cavity 100a, and the second upper isolation wall 104b is set at one end of the second upper terminal cavity 103b close to the upper arc-extinguishing chamber cavity 100b.

[0083] The above content is the further detailed description of the present invention in conjunction with specific preferred embodiments, but it cannot be considered that the specific implementation of the present invention is limited to these descriptions. For the person skilled in the technical field of the invention, a number of simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A moulded case circuit breaker comprising:

a circuit breaker body (1) and an electric operating device (2),

said circuit breaker body (1) includes an operating mechanism (3), said operating mechanism (3) includes a handle (30) that is driven with said electric operating device (2),

wherein said electric operating device (2) includes a rotary disk (25-5) that is rotatably set, a cam (25-6) and a sliding block (26-0) that are set on the rotary disk (25-5), and a sliding rail (26-1) limiting and guiding the sliding block (26-0), said sliding block (26-0) includes a driven groove of sliding block (26-00) and a driving groove of sliding block (26-01), the cam (25-6) is matched with the driven groove of sliding block (26-00) by driving, and the handle (30) is inserted in the driving groove of sliding block (26-01),

the rotary disk (25-5) rotates and drives the sliding block (26-0) to reciprocate along the sliding rail (26-1) through the cam (25-6), and the sliding block (26-0) drives the handle (30) to swing through the driving groove of sliding block (26-01), so as to switch in/switch off the moulded case circuit breaker.

2. The moulded case circuit breaker according to Claim 1, wherein said electric operating device (2) further includes the motor (25-3), the transmitting gear set (25-4), and the main transmitting shaft (25-0), the main transmitting shaft (25-0) is connected with the rotary disk (25-5) by driving and drives the rotary disk (25-5) to rotate,
the driven groove of sliding block (26-00) is arranged on one end of the sliding block (26-0), and the driving groove of sliding block (26-01) is arranged in the middle of the sliding block (26-0), the driven groove of sliding block (26-00) and the driving groove of sliding block (26-01) are located on both sides of the sliding block(26-0) respectively, said driving groove of driving block (26-01) includes a driving side of switching-in (26-011) and a driving side of switching-off (26-010) which are arranged opposite each other and matched with the handle (30) by driving.

3. The moulded case circuit breaker according to Claim 1, wherein said moulded case circuit breaker further includes a fourth microswitch (22-4), the sliding block includes a triggering structure of sliding block (26-02), When said moulded case circuit breaker is in the switching-in state, the sliding block (26-0) is located at the position for switching-in, the triggering structure of sliding block (26-02) drives the fourth microswitch (22-4) to switch in, when the moulded case circuit breaker is in the switching-off state, the sliding block (26-0) is located at the position for switching-off, and the trigger structure of sliding block (26-02) is far away from the fourth microswitch (22-4) to make it switch off,
said electric operating device (2) further includes a reset spring of sliding block, the reset spring of sliding block is connected with the sliding block (26-0), so as to provide a pulling force for the sliding block (26) in the same direction as the sliding direction that the sliding block (26-0) drives the moulded case circuit breaker to switch off.

4. The moulded case circuit breaker according to Claim 1, wherein said moulded case circuit breaker also includes a locking device (6), the locking device includes a locking member (63) that is rotationally set, when the moulded case circuit breaker is in switching-off state, the sliding block (26-0) is located at the position for switching-off, and the locking member (63) is rotated to restrictively match with the sliding block (26-0) to prevent the sliding block (26-0) from sliding.

5. The moulded case circuit breaker according to Claim 4, wherein when moulded case circuit breaker is in switching-in state, the sliding block (26-0) is located at the position for switching-in, and the locking member (63) is restrictively matched with the sliding block (26-0) to prevent the locking member (63) from rotating.

6. The moulded case circuit breaker according to Claim 5, wherein said locking member (63) includes the locking bump (631), and the locking bump (631) includes a locking bump surface (6310),
when said moulded case circuit breaker is in switching-off state, the locking member (63) is rotated to make the locking bump surface (6310) perpendicular to the sliding direction of the sliding block (26-0) and restrictively match with the sliding block (26-0) , so as to prevent the sliding block (26-0) from sliding, when sad moulded case circuit breaker is in the switching-in state, the locking bump surface (6310) is parallel to the sliding direction of the sliding block (26-0), and the sliding block (26-0) is restrictively matched with the locking bump surface (6310) to prevent the locking member (63) from rotating.

7. The moulded case circuit breaker according to Claim 6, wherein said sliding block (26-0) includes a locking structure of sliding block (26-03), and the locking structure of sliding block (26-03) includes a first limiting side surface (26-030) and a first locking side (26-031) which are perpendicular to each other, the first limiting side (26-030) is restrictively matched with the locking bump surface (6310) to prevent the locking member (63) from rotating, and the locking bump surface (6310) is restrictively matched with the first locking side (26-031) to prevent the sliding block (26-0) from sliding.

8. The moulded case circuit breaker according to Claim 6, wherein said electric operating device (2) further includes the indicating disk (25-1) that is set on the main transmitting shaft (25-0) of the electric operating device (2) to rotate coaxially with it, said moulded case circuit breaker also includes a switching push rod (24-0) which is slidably set and can block and dodge the main transmitting shaft (25-0),
said moulded case circuit breaker further includes a first microswitch (22-1), a second microswitch (22-2), a third microswitch (22-3), and a fourth microswitch (22-4), which are respectively a status indicating microswitch, a manual automatic switching microswitch, a locking microswitch and a reset microswitch, the first microswitch (22-1) is driven with the indicating disk (25-1), the second microswitch (22-2) is driven with the switching push rod (24-0), the third microswitch (22-3) is driven with the locking device (6), and the fourth microswitch (22-4) is driven with the sliding block (1).

9. The moulded case circuit breaker according to Claim 6, wherein said electric operating device (2) further includes a device support (20-1) and a sliding block support, the device support (20-1), the sliding block support and the circuit breaker body (1) are sequentially set and linked together, the sliding block (26-0) is set inside the sliding block support, the main transmitting shaft (25-0) of said electric operating device (2) is set in the middle of the device support (20-1), and the switching push rod (24-0) is slidably set on the device support (20-1) and is located above the main transmitting shaft (25-0), the locking device (6) is rotatably connected with the device support (20-1), the first microswitch (22-1), the second microswitch (22-2) and the third microswitch (22-3) are set on one side of the device support (20-1), and the fourth microswitch (22-4) is set on the other side of the device support (20-1), and the fourth microswitch (22-4) and the sliding block support are located on the same side of the device support (20-1).

10. The moulded case circuit breaker according to Claim 1, wherein said circuit breaker body (1) includes a body shell (1a), and the body shell (1a) includes s cover (10a) and s base (11a) that are joined together, the body shell (1a) further includes at least one pole chamber, each of which is provided with one terminal cavity at both ends, each of the terminal cavities is provided with a connecting terminal, each of the terminal cavities is composed of an upper terminal cavity set on the cover (10a) and a lower terminal cavity set on the base (11a), each of the connecting terminals includes a connecting frame, and both ends of each connecting frame are respectively set in the upper terminal cavity and lower terminal cavity of one terminal cavity, said moulded case circuit breaker further includes a terminal cover that is restrictively matched with the connecting frame one-to-one, each terminal cover includes two isolation side walls of terminal cover set opposite each other, and the two isolation side walls of terminal cover are respectively set on two sides of the connecting frame.

11. The moulded case circuit breaker according to Claim 10, wherein each terminal cover further includes a limiting side wall of terminal cover, which is connected with two isolation side walls of terminal cover, respectively, the limiting side wall of the terminal cover is set on one side of the inner port of the connecting frame, and the two ends thereof are restrictively matched with the cover (10a) and the base (11a).

12. The moulded case circuit breaker according to Claim 11, wherein a connecting plate for connecting the connecting terminal and the internal circuit of the pole chamber is inserted in each of the connecting frames, the connecting plate is stacked on the bottom wall of the connecting frame, and the end of the limiting side wall of the terminal cover, restrictively matched with the base (11a) , is pressed against the connecting plate.

13. The moulded case circuit breaker according to Claim 10, wherein the connecting terminal includes a first connecting terminal (5-0) and a second connecting terminal (5-1), both ends of each pole chamber are respectively provided with the first terminal cavity and the second terminal cavity, the first connecting terminal (5-0) is set in the first terminal cavity, and the second connecting terminal (5-1) is set in the second terminal cavity, and the first connecting terminal (5-0) includes a first connecting frame (5-00), and the second connecting terminal (5-1) includes a second connecting frame (5-10), each of the pole chambers is also provided with an arc-extinguishing chamber (1-0), the air outlet of which is opposite the first connecting terminal (5-0), said terminal cover includes a first terminal cover (4-0) and a second terminal cover (4-1), which are restrictively matched with the first connecting terminal (5-0) and the second connecting terminal (5-1) respectively, said moulded case circuit breaker further includes a first connecting plate (5-03) and a second connecting plate (5-13), one end of the first connecting plate (5-03) is inserted in the first connecting frame (5-00), and one end of the second connecting plate (5-13) is inserted in the second connecting frame (5-10).

14. The moulded case circuit breaker according to Claim 13, wherein the first terminal cover (4-0) includes two first isolation side walls of terminal cover (4-01) set opposite each other and one first limiting side wall of terminal cover (4-03), two first isolation side walls of terminal cover (4-01) are set on both sides of the first connecting frame (5-00), and the first limiting side wall of terminal cover (4-03) is respectively connected to the two first isolation side walls of terminal cover (4-01), and set on one side of the first connecting inner port of the first connecting frame (5-00), and the two ends are restrictively matched with the cover (10a) and the base (11a), one end of the first limiting side wall of terminal cover (4-03) that is restrictively matched with the base (11a) is pressed against the first connecting plate (5-03), and the other end of the first limiting side wall of terminal cover (4-03) protrudes from one side of the connecting frame (5-00) to form the arc extinguishing portion of terminal cover, which is provided with multiple gas-discharging holes (4-04),
the first terminal cover (4-0) further includes an arc-isolation plate (4-06) which is set on one side of the arc extinguishing portion of terminal cover away from the arc-extinguishing chamber (1-0) to block the gas-discharging hole (4-04), the first terminal cover (4-0) also includes a first top wall of terminal cover (4-02), which is set on the upper side of the top wall of the first connecting frame (5-0), the connection between the first top wall of terminal cover (4-02) and the first limiting side wall of terminal cover (4-03) is provided with a limiting groove of isolation plate (4-05), in which one end of the arc-isolation plate (4-06) is inserted.

15. The moulded case circuit breaker according to Claim 13, wherein the second terminal cover (4-1) includes two second isolation side walls of terminal cover (4-11) set opposite each other and one second limiting side wall of terminal cover (4-13), two second isolation side walls of terminal cover (4-11) are set on both sides of the second connecting frame (5-10), and the second limiting side wall of terminal cover (4-13) are respectively connected to two second isolation side walls of terminal cover (4-11), and set on one side of the second inner port of connecting frame of the second connecting frame (5-10), and the two ends are restrictively matched with the cover (10a) and the base (11a), one end of the second limiting side wall of terminal cover (4-13) that is restrictively matched with the base (11a) is pressed against the second connecting plate (5-13), and the other end of the second limiting side wall of terminal cover (4-13) is set close to the top wall of the second connecting frame (5-10).

16. The moulded case circuit breaker according to Claim 1, wherein the circuit breaker body (1) further includes an arc-extinguishing chamber (1-0), a first connecting plate (5-03) and a first connecting frame (5-00), the arc-extinguishing chamber (1-0) includes a plurality of arc extinguishing grids set side by side, one end of the first connecting plate (5-03) is inserted into the first connecting frame (5-00), and another end passes through the middle of the arc-extinguishing chamber (1-0) to connect with the internal circuit of the pole chamber to divide the arc extinguishing grids into two parts.

17. The moulded case circuit breaker according to Claim 16, wherein the static contact is set on the first connecting plate (5-03), the arc extinguishing grids is set on both sides of the static contact.

18. The moulded case circuit breaker according to Claim 1, wherein said sliding block (26-0) is of integrated structure.

Drawing