LEAD-OUT STRUCTURE AND MAGNETIC LATCHING RELAY

Abstract

 Provided in the embodiments of the present disclosure are a lead-out structure and a magnetic latching relay. The lead-out structure comprises a lead-out member and at least one auxiliary member. The lead-out member comprises a first lead-out portion and a second lead-out portion, wherein one end of the second lead-out member is connected to one side of the first lead-out portion; in the direction of width of the lead-out member, the width of the second lead-out portion is less than the width of the first lead-out portion; the first lead-out portion is configured to electrically connect to a static spring portion of a relay; and the at least one auxiliary member is fixedly connected to the second lead-out portion. The lead-out member is formed by means of a stamping process, and the auxiliary member is formed using the remaining material after forming the lead-out member by means of the stamping process. The lead-out structure of the present disclosure enables the preparation process to be simplified, allows a load circuit to have a reduced impedance, and has an increased current-carrying area which helps reduce temperature rise, while also saving on materials and reducing costs.

Description

CROSS REFERENCE

[0001] This application is based upon and claims priority to Chinese Patent Application No. 202311378653.9, filed on October 23, 2023, the entire contents thereof are incorporated herein by reference.

TECHNICAL FIELD

[0002] The present disclosure relates to the field of relay technology, and in particular to a lead-out structure and a magnetic latching relay.

BACKGROUND

[0003] The magnetic latching relay is an automatic switch that connects and disconnects the circuit. The magnetic latching relay includes a lead-out structure for electrical connection to the load circuit.

[0004] In the related art, the lead-out structure includes a connecting piece and a round copper rod, and the round copper rod and the connecting piece are connected by welding. The connecting piece is used to connect to a static contact portion in the relay, and the round copper rod is used to connect to an external load circuit. However, due to the sudden change of the conductive cross-section material at the connection between the round copper rod and the connecting piece, the current density of the two is inconsistent, which increases the impedance of the load circuit. In the related art, the lead-out structure is generally connected to a current transformer of larger specifications. Due to the size limitation, it is difficult to install the current transformer of smaller specifications. In addition, after the connecting piece is formed in the preparation process, the remaining material will be wasted, and the cost of the copper rod is also high, which increases the cost of the product.

[0005] The above information disclosed in this section is intended only to enhance understanding of the background of present disclosure, and hence may include information that does not constitute relevant art known to those skilled in the art.

SUMMARY

[0006] The embodiment of the disclosure provides a lead-out structure and a magnetic latching relay, which can reduce the impedance of the load circuit and save costs.

[0007] The embodiment of the disclosure provides a lead-out structure including a lead-out part and at least one auxiliary part. The lead-out part includes a first lead-out part and a second lead-out part, one end of the second lead-out part is connected to one side of the first lead-out part; in a width direction of the lead-out part, the width of the second lead-out part is smaller than the width of the first lead-out part; the first lead-out part is used to electrically connected to the static contact portion of a relay; at least one auxiliary part is fixedly connected to the second lead-out part; wherein the lead-out part is formed by a stamping process, and the auxiliary part is formed by using a remaining material after the lead-out part is formed by the stamping process.

[0008] In some embodiments of the present disclosure, the first lead-out part is a plate-like structure, and in a thickness direction of the lead-out part, a thickness of the first lead-out part is the same as a thickness of the second lead-out part.

[0009] In some embodiments of the present disclosure, in the thickness direction of the lead-out part, the first lead-out part has a first surface and a second surface opposite to the first surface, and the second lead-out part has a third surface and a fourth surface opposite to the third surface, wherein the first surface is flush with the third surface, and the second surface is flush with the fourth surface.

[0010] In some embodiments of the present disclosure, in the width direction of the lead-out part, a side surface of the first lead-out part is flush with a side surface of the second lead-out part.

[0011] In some embodiments of the present disclosure, the auxiliary part is a plate-shaped structure, and the auxiliary part is laid flat on the third surface of the second lead-out part; in the width direction of the lead-out part, a width of the auxiliary part is less than or equal to a width of the second lead-out part.

[0012] In some embodiments of the present disclosure, the auxiliary part and the second lead-out part are used to connect a current transformer, a total thickness of the auxiliary part and the second lead-out part is less than or equal to a diameter of a mounting hole of the current transformer; and a maximum widths of the second lead-out part and the auxiliary part is less than or equal to a diameter of the mounting hole of the current transformer.

[0013] In some embodiments of the present disclosure, a number of the auxiliary part is plural, and the plural auxiliary parts are disposed at one side or at two opposite sides of the second lead-out part.

[0014] In some embodiments of the present disclosure, a length of the auxiliary part is the same as a length of the second lead-out part.

[0015] The embodiment of the disclosure further provides a magnetic latching relay, comprising a base; a contact structure disposed on the base, the contact structure comprising two elastic pieces parallel with each other, each elastic piece has a static contact portion and a movable contact portion; a lead-out structure of present disclosure, the first lead-out part of the lead-out structure is connected to one end of the static contact portion, the second lead-out part of the lead-out structure extends out of the base from a side of the base; a current transformer disposed outside the base, the current transformer has a mounting hole, the second lead-out part and the auxiliary part of the lead-out structure are inserted into the mounting hole, and the ends of the second lead-out part and the auxiliary part away from the first lead-out part extends out of the mounting hole.

[0016] In some embodiments of the present disclosure, the magnetic latching relay further includes a push card disposed on the base, one end of the push card is connected to the movable contact portion, and the push card is located below the second lead-out part and can move below the second lead-out part.

[0017] It can be seen from the above technical solution that present disclosure has at least one of the following advantages and positive effects:
In the embodiment of the disclosure, the lead-out part is formed by a stamping process, so the first lead-out part and the second lead-out part can be formed by a single stamping process, which simplifies the process and eliminates the need to separately set the second lead-out part. The first lead-out part and the second lead-out part are made of same material, so the current density of the two is the same, which reduces the impedance of the load circuit. By fixing the auxiliary part to the second lead-out part, the current carrying area is increased, thereby reducing the temperature rise, and the second lead-out part can be set narrower, so as to facilitate insertion into the current transformer of a smaller specification. In addition, the auxiliary part is formed by using the remaining material after the lead-out part is formed by a stamping process, which saves materials and reduces costs.

BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other features and advantages of present disclosure will become more apparent by describing in detail example embodiments thereof with reference to the accompanying drawings.

Fig. 1 is an exploded schematic diagram of the lead-out structure according to some embodiments of present disclosure;

Fig. 2 is an exploded top view of the lead-out structure according to some embodiments of present disclosure;

Fig. 3 is an exploded side view of the lead-out structure according to some embodiments of present disclosure;

Fig. 4 is a schematic perspective view of the lead-out structure after assembly according to some embodiments of present disclosure;

Fig. 5 is a schematic perspective view of the lead-out structure with two auxiliary parts after assembly according to some embodiments of present disclosure;

Fig. 6 is a schematic diagram showing the connection between the lead-out structure and the current transformer, the static contact portion according to some embodiments of present disclosure;

Fig. 7 is a schematic perspective view of the magnetic latching relay according to some embodiments of present disclosure;

Fig. 8 is a schematic perspective view of the magnetic latching relay without the current transformer according to some embodiments of present disclosure;

Fig. 9 is a schematic top view of the magnetic latching relay without the current transformer according to some embodiments of present disclosure;

Fig. 10 is a schematic diagram of the magnetic latching relay without the base and the current transformer according to some embodiments of present disclosure;

Fig. 11 is a schematic diagram showing the lead-out structure, the base and the push card according to some embodiments of present disclosure.

Description of reference numerals:

[0019] 100, lead-out structure; 10, lead-out part; 1, first lead-out part; 101, first surface; 102, second surface; 2, second lead-out part; 201, third surface; 202, fourth surface; 203, protrusion; 3, auxiliary part; 301, fifth surface; 302, sixth surface; 303, riveting hole; 200, current transformer; 300, base; 400, coil module; 401, bobbin; 402, coil; 500, contact structure; 501, movable contact portion; 502, movable contact; 503, static contact portion; 504, static contact; 505, compression spring; 600, magnetic circuit structure; 601, yoke; 602, armature; 603, permanent magnet; 604, swing arm; 700, push card; 800, lead-out terminal; X, length direction; Y, width direction; Z, thickness direction.

DETAILED DESCRIPTION

[0020] Exemplary embodiments will be described more comprehensively with reference to the accompanying drawings. However, the exemplary embodiments can be implemented in various forms and should not be understood as being limited to implementations described herein. Rather, these embodiments are provided to make the present disclosure comprehensive and complete, and fully convey the idea of exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote same or similar structures, and thus their detailed description will be omitted.

[0021] In order to make the solution clearer, the structure of the magnetic latching relay is briefly described first. Referring to Fig. 7, a schematic perspective view of the magnetic latching relay is shown (without the housing). The magnetic latching relay includes a base 300, a coil module 400, a contact structure 500, a magnetic circuit structure 600, a push card 700 and a lead-out structure 100 all disposed on the base 300. The coil module 400 includes an iron core (not shown in the drawings), a bobbin 401 and a coil 402. The coil 402 is wound around the outer surface of the bobbin 401, and the iron core is disposed in the bobbin 401. The magnetic circuit structure 600 includes a yoke 601, an armature 602, a permanent magnet 603 and a swing arm 604. The yoke 601 is fixed on the base 300. There are two yokes 601, which are located at two ends of the bobbin 401 and connected to the iron core. The permanent magnet 603 is located at one side of the coil module 400. The two ends of the permanent magnet 603 are connected to the armature 602, and the permanent magnet 603 and the armature 602 are fixedly connected together by an injection molded part formed by the injection molding process. The injection molded part has two rotating shafts on the opposite sides, one rotating shaft is inserted through an axial hole on the base 300, and the other rotating shaft is inserted through an axial hole on the fixed frame, so that the injection molded part can rotate. The injection molded part also includes two swing arms 604 respectively located on both sides of the permanent magnet 603.

[0022] As shown in Fig. 9, the contact structure 500 includes two parallel elastic pieces, each elastic piece has a movable contact portion 501 and a static contact portion 503, the movable contact portion 501 is provided with a movable contact 502, and the static contact portion 503 is provided with a static contact 504. The movable contact of one elastic piece corresponds to the static contact of the other elastic piece, and the static contact of one elastic piece corresponds to the movable contact of the other elastic piece. The contact structure 500 further includes a compression spring 505, and the compression spring 505 is connected to the movable contact portion 501.

[0023] The push card 700 is disposed on the base 300, one end of which is connected to the compression spring 505, and the other end of which can be movably connected to the swing arm 604 of the injection molded part. When the swing arm 604 swings, it can drive the push card 700 to move, and then drive the movable contact portion 501 to move through the compression spring 505.

[0024] The lead-out structure 100 is connected to the static contact portion 503, and the other end is connected to a load circuit.

[0025] When the coil 402 is supplied with a forward pulse voltage, the permanent magnet 603 swings to one side, and at the same time drives the armature 602 to swing, so that the armature 602 overlaps with the yoke 601 on both sides. The permanent magnet 603, the armature 602, the yoke 601 and the iron core form a complete magnetic field. At the same time, the permanent magnet 603 drives the swing arm 604 to swing, and the swing arm 604 drives the push card 700 to move. The push card 700 pushes the movable contact portion 501 through the compression spring 505, so that the movable contact 502 of one elastic piece and the static contact 504 of the other elastic piece are in contact, that is, the two elastic pieces are closed, the relay is closed, and the current flows through the static contact portion 503 through the lead-out structure 100, and the external load circuit is turned on. When the coil 402 is powered off, the permanent magnet 603 can maintain the magnetic field, that is, to maintain the position of the swing arm 604, thereby maintaining the contact of the movable contact 502 and the static contact 504.

[0026] When the coil 402 is supplied with a reverse pulse voltage, the permanent magnet 603 swings to the other side, and at the same time drives the armature 602 to swing to the other side, so that the armature 602 can still overlap with the yoke 601 on both sides to form another complete magnetic field. At the same time, the permanent magnet drives the swing arm 604 to swing, and the swing arm 604 drives the push card 700 to move in the opposite direction. The push card 700 pulls the movable contact portion 501, so that the movable contact 502 of one elastic piece is disconnected from the static contact 504 of the other elastic piece, the two elastic pieces are disconnected, the relay is disconnected, the current flowing through the lead-out structure 100 is disconnected, and the external load circuit is disconnected. When the coil 402 is powered off, the permanent magnet 603 can maintain the magnetic field, that is, it can maintain the position of the swing arm 604, and then keep the movable contact 502 and the static contact 504 disconnected.

[0027] The lead-out structure 100 of the embodiment of the disclosure is described in detail below. As shown in Figs. 1 to 4, the lead-out structure 100 includes a lead-out part 10 and at least one auxiliary part 3.

[0028] In some embodiments, the lead-out part 10 includes a first lead-out part 1 and a second lead-out part 2, one end of the second lead-out part 2 is connected to one side of the first lead-out part 1; in the width direction Y of the lead-out part 10, the width of the second lead-out part 2 is smaller than the width of the first lead-out part 1; the first lead-out part 1 is used to electrically connect to the static contact portion 503 of the magnetic latching relay. At least one auxiliary part 3 is fixedly connected to the second lead-out part 2. The lead-out part 10 is formed by a stamping process, and the auxiliary part 3 is formed by the remaining material after the lead-out part 10 is formed by the stamping process.

[0029] Stamping process is a metal processing method based on the plastic deformation of metal. It uses molds and stamping equipment to apply pressure to the sheet material to cause plastic deformation or separation of the sheet material, thereby obtaining parts (stamping parts) with certain shapes, sizes and properties.

[0030] As shown in Fig.1, the lead-out part 10 is formed by stamping; part of the material is removed. This part of the material can be called the remaining material. The remaining material is further stamped to form the auxiliary part 3 mentioned above.

[0031] In some embodiments, the auxiliary part 3 may be fixedly connected to the second lead-out part 2 by riveting, threading or welding. As shown in Fig. 1, when the auxiliary part 3 is riveted to the second lead-out part 2, the protrusion 203 may be provided on the second lead-out part 2, and the riveting hole 303 may be provided on the auxiliary part 3.

[0032] In some embodiments, the first lead-out part 1 is a plate-like structure, and in the thickness direction Z of the lead-out part 10, the thickness of the first lead-out part 1 is the same as the thickness of the second lead-out part 2.

[0033] As shown in Fig. 1, when the lead-out part 10 is formed by stamping a plate-like structure, the first lead-out part 1 and the second lead-out part 2 have the same thickness. Of course, the thickness of the first lead-out part 1 and the second lead-out part 2 may be different, for example, the second lead-out part 2 may be thinner or thicker than the first lead-out part 1. The total thickness of the second lead-out part 2 and the auxiliary part 3 may be further adjusted by the auxiliary part 3 so that the two can be inserted into a current transformer 200.

[0034] In some embodiments, as shown in Figs. 1 and 3, in the thickness direction Z of the lead-out part 10, the first lead-out part 1 has a first surface 101 and a second surface 102 opposite to the first surface 101, and the second lead-out part 2 has a third surface 201 and a fourth surface 202 opposite to the third surface 201, wherein the first surface 101 is flush with the third surface 201, and the second surface 102 is flush with the fourth surface 202. As shown in Fig. 1 and Fig. 3, the first surface 101 of the first lead-out part 1 is flush with the second surface 102 of the second lead-out part 2, and the second surface 102 of the first lead-out part 1 is flush with the fourth surface 202 of the second lead-out part 2. That is, there is no angle between the first lead-out part 1 and the second lead-out part 2, or the angle is 180°, so that the manufacturing process can be simplified.

[0035] In some embodiments, the first surface 101 of the first lead-out part 1 may not be flush with the third surface 201 of the second lead-out part 2, that is, the third surface 201 of the second lead-out part 2 may be concaved or protruded compared to the first surface 101 of the second lead-out part 2, or there may be an angle between the first lead-out part 1 and the second lead-out part 2, for example, the second lead-out part 2 is tilted compared to the first lead-out part 1. Those skilled in the art may set it according to actual conditions, for example, according to the connection of the load circuit, the space occupied by the relay, etc., and no special limitation is made here.

[0036] In some embodiments, in the width direction Y of the lead-out part 10, a side surface of the first lead-out part 1 is flush with a side surface of the second lead-out part 2.

[0037] As shown in Fig. 2, the width of the second lead-out part 2 is smaller than the width of the first lead-out part 1, and the second lead-out part 2 is located on one side of the first lead-out part 1, that is, one side of the first lead-out part 1 is flush with one side of the second lead-out part 2, so that in the width direction Y, the first lead-out part 1 protrudes compared with the second lead-out part 2. Since the first lead-out part 1 is used to connect with the static contact portion 503, as shown in Figs. 7 and 8, the first lead-out part 1 needs to be placed in the base 300 of the magnetic latching relay, and the second lead-out part 2 extends from one side of the base 300, so that the side of the first lead-out part 1 is flush with the side of the second lead-out part 2, which is beneficial for the cover of the relay to be covered on the base 300 and convenient for the processing of the lead-out part 10.

[0038] In some embodiments, the side of the first lead-out part 1 may not be flush with the side of the second lead-out part 2. For example, the side of the second lead-out part 2 may be concaved or protruded compared to the side of the first lead-out part 1, as long as the first lead-out part 1 can be connected to the static contact portion 503, and the second lead-out part 2 can extend out of the base 300 without interfering with the installation of the relay. Of course, in the case where the second lead-out part 2 and the auxiliary part 3 can pass through the current transformer 200, the widths of the second lead-out part 2 and the auxiliary part 3 are as large as possible, so as to increase the current carrying area and reduce the temperature rise.

[0039] In some embodiments, as shown in Fig. 3, the auxiliary part 3 is a plate-like structure, and the auxiliary part 3 is laid flat on the third surface 201 of the second lead-out part 2; in the width direction Y of the lead-out part 10, the width of the auxiliary part 3 is less than or equal to the width of the second lead-out part 2.

[0040] As shown in Fig. 3, the auxiliary part 3 is a plate-like structure, and the auxiliary part 3 has a fifth surface 301 and a sixth surface 302 opposite to the fifth surface 301. The auxiliary part 3 is laid flat on the third surface 201 of the second lead-out part 2, which can be understood as after the auxiliary part 3 is installed on the second lead-out part 2, the sixth surface 302 of the auxiliary part 3 is attached to the third surface 201 of the second lead-out part 2.

[0041] In some embodiments, in the width direction Y of the lead-out part 10, the width of the auxiliary part 3 is equal to the width of the second lead-out part 2. In this case, the width of the first lead-out part 1 can just pass through the mounting hole of the current transformer 200, that is, the widths of the first lead-out part 1 and the auxiliary part 3 are set to the maximum, so that the current carrying area can be increased and the temperature rise can be reduced.

[0042] In other embodiments, the width of the auxiliary part 3 may be greater than or less than the width of the second lead-out part 2. Regardless of the widths of the auxiliary part 3 and the second lead-out part 2, the auxiliary part 3 can be inserted into the current transformer 200 after being installed on the second lead-out part 2.

[0043] In some embodiments, as shown in Figs. 6 and 7, the auxiliary part 3 and the second lead-out part 2 are used to connect a current transformer 200, and the total thickness of the auxiliary part 3 and the second lead-out part 2 is less than or equal to the diameter of the mounting hole of the current transformer 200; the maximum width of the second lead-out part 2 and the auxiliary part 3 is less than or equal to the diameter of the mounting hole of the current transformer 200. The current transformer 200 plays a role in current measurement.

[0044] As shown in Fig. 6, the center of the current transformer 200 has a mounting hole, and the auxiliary part 3 and the second lead-out part 2 can pass through the mounting hole, so that the current transformer 200 is arranged on the second lead-out part 2 and the auxiliary part 3. Therefore, the total thickness of the auxiliary part 3 and the second lead-out part 2 must be less than or equal to the diameter of the mounting hole, and the maximum width of the second lead-out part 2 and the auxiliary part 3 should be less than or equal to the diameter of the mounting hole.

[0045] The shape of the mounting hole can be circular or rectangular. When the shape of the mounting hole is circular, the sixth surface 302 of the auxiliary part 3 can be a plane, which fits the third surface 201 of the second lead-out part 2, and the two side surfaces of the auxiliary part 3 and the fifth surface 301 can be arc-shaped surfaces to adapt to the circular hole, and can increase the thickness of the auxiliary part 3 to the maximum extent, thereby increasing the current-carrying area. When the shape of the mounting hole is rectangular, the auxiliary part 3 can be a rectangular plate-like structure.

[0046] In some embodiments, the auxiliary part 3 is provided in plural numbers, and the plural auxiliary parts 3 are provided on one side or on two opposite sides of the second lead-out part 2.

[0047] As shown in Fig. 5, the number of the auxiliary part 3 may be two, three, four, five, six or more. A plurality of auxiliary parts 3 may be provided on one side of the second lead-out part 2, for example, a plurality of auxiliary parts 3 are all provided on the third surface 201 of the second lead-out part 2. Alternatively, a plurality of auxiliary parts 3 are provided on opposite sides of the second lead-out part 2, that is, a plurality of auxiliary parts 3 are respectively provided on the third surface 201 and the fourth surface 202 of the second lead-out part 2. The thickness and width of each auxiliary part 3 may be different. For example, when the mounting hole of the current transformer 200 is a circular hole, among the plurality of auxiliary parts 3, the thickness and width of the auxiliary parts 3 in the direction away from the second lead-out part 2 may be gradually reduced, under the condition that the auxiliary parts 3 can pass through the mounting holes, more auxiliary parts 3 are arranged, thereby further increasing the current-carrying area and reducing the temperature rise. Of course, the thickness and width of the multiple auxiliary parts 3 may also be the same, and those skilled in the art may set them according to actual conditions, and are not specifically limited here.

[0048] In some embodiments, in the length direction X of the lead-out part 10, the length of the auxiliary part 3 is the same as the length of the second lead-out part 2. In this way, the length of the auxiliary part 3 is maximized to increase the current-carrying area and reduce the temperature rise. As shown in Fig. 8, when the lead-out structure 100 is applied to the relay, a part of the second lead-out part 2 and the auxiliary part 3 are located outside the base 300, and the ends of the second lead-out part 2 and the auxiliary part 3 away from the first lead-out part 1 are connected to the lead-out terminal 800, and the lead-out terminal 800 is used to connect to the external load circuit. In the embodiment of the disclosure, the end surface of the auxiliary part 3 away from the first lead-out part 1 is flush with the end surface of the second lead-out part 2 away from the first lead-out part 1, so that the load current can flow smoothly through the lead-out terminal 800.

[0049] In summary, in the embodiment of the disclosure, the lead-out part 10 is formed by a stamping process, so the first lead-out part 1 and the second lead-out part 2 can be formed by a single stamping process, which simplifies the process and there is no need to separately set the second lead-out part 2, for example, there is no need to set a round copper rod. Moreover, the first lead-out part 1 and the second lead-out part 2 are made of the same material, so the current density of the two is the same, which reduces the impedance of the load circuit. By fixing the auxiliary part 3 to the second lead-out part 2, the current carrying area is increased, thereby reducing the temperature rise, and the second lead-out part 2 can be set narrower, so as to facilitate the insertion of the current transformer 200 of a smaller specification. In addition, the auxiliary part 3 is formed by using the remaining material after the lead-out part 10 is formed by a stamping process, which saves materials and reduces costs.

[0050] The embodiment of the disclosure further provides a magnetic latching relay, as shown in Figs. 7 and 8, the magnetic latching relay includes a base 300, a contact structure 500, a lead-out structure 100 and a current transformer 200. The contact structure 500 is disposed on the base 300. The contact structure 500 includes two parallel elastic pieces; each elastic piece has a static contact portion 503 and a movable contact portion 501. The lead-out structure 100 is the lead-out structure described in any of the above embodiments. The first lead-out part 1 of the lead-out structure 100 is connected to one end of the static contact portion 503 of one of the two parallel elastic pieces, and the second lead-out part 2 of the lead-out structure 100 extends out of the base 300 from a side surface of the base 300. The current transformer 200 is disposed outside the base 300. The current transformer 200 has a mounting hole, the second lead-out part 200 extends out of the base 300, and the current transformer 200 has a mounting hole. The lead-out part 2 and the auxiliary part 3 are inserted into the mounting hole, and ends of the second lead-out part 2 and the auxiliary part 3 away from the first lead-out part 1 extend out of the mounting hole.

[0051] The relay structure in the embodiment of the disclosure is the same as the structure of the relay described in the above embodiment. For example, the relay also includes a magnetic circuit structure 600, a push card 700 and a coil 402 of the above embodiment, which will not be described in detail here.

[0052] As shown in Figs. 8 to 10, the magnetic latching relay in this embodiment of the disclosure further includes a push card 700, which is disposed on the base 300. One end of the push card 700 is connected to the movable contact portion 501. The push card 700 is located below the second lead-out part 2 of the lead-out structure 100 and is capable of moving below the second lead-out part 2.

[0053] As shown in Fig. 8, the contact structure 500 of the embodiment of the disclosure further includes a compression spring 505, and the compression spring 505 is disposed on the movable contact portion 501. One end of the push card 700 is connected to the compression spring 505, and the connection with the movable contact portion 501 is achieved through the compression spring 505. The other part of the push card 700 is connected to the swing arm of the magnetic circuit structure 600. When the forward pulse voltage is applied to the coil 402, the swing arm 604 of the magnetic circuit structure 600 drives the push card 700 to move, and the push card 700 pushes the movable contact portion 501 through the compression spring 505, so that the movable contact 502 on the movable contact portion 501 of one elastic piece and the static contact 504 on the static contact portion 503 of another elastic piece are in contact, and the relay is closed. The load current flows through the lead-out structure 100 via the static spring part 503, so that the external load circuit is turned on.

[0054] In order to more clearly show the connection between the lead-out structure 100 and the static contact portion 503, Fig. 10 shows the structure of the magnetic latching relay with the base 300 is removed, and Fig. 11 is a schematic diagram of only retaining the base 300, the push card 700 and the lead-out structure 100. As shown in Figs. 10 and 11, the second lead-out part 2 of the lead-out part 10 is arranged in the base 300, and the push card 700 is located below the second lead-out part 2 and does not contact the second lead-out part 2, and the push card 700 can move with the swing arm 604, so the second lead-out part 2 gives way to the push card 700, ensuring that the push card 700 can move smoothly.

[0055] In some embodiments, as shown in Figs. 9 and 10, the magnetic latching relay includes two contact structures 500 and two lead-out structures 100; each lead-out structure 100 is connected to a static contact portion 503 in each contact structure 500. One end of the push card 700 is connected to a movable contact portion 501 of one of the contact structures 500 (e.g., connected via the compression spring 505), and the other end is connected to a movable contact portion 501 of the other contact structure 500 (e.g., connected via another compression spring 505), and the swing arm 604 can be movably connected to a portion of the push card 700 located between the two ends.

[0056] In some embodiments, as shown in Figs. 8 to 10, the magnetic latching relay may further include a lead-out terminal 800. The lead-out terminal 800 is connected to the ends of the second lead-out part 2 and the auxiliary part 3. The lead-out terminal 800 is used to connect to the external load circuit. For example, the lead-out terminal 800 can be plugged into a plug interface of the load to achieve electrical connection.

[0057] In summary, in the magnetic latching relay in this embodiment of the disclosure, the first lead-out part 1, the second lead-out part 2 and the auxiliary part 3 of the lead -out structure 100 are made of the same material, so that the current density is the same, and the impedance of the load circuit is reduced. By fixing the auxiliary part 3 to the second lead-out part 2, the current carrying area is increased and the temperature rise is reduced. At the same time, the second lead-out part 2 can be set narrower, so that the magnetic latching relay can be configured with a smaller specification of the current transformer 200. The lead-out structure 100 is formed by a stamping process, which saves materials and reduces costs.

[0058] It can be understood that various embodiments/implementations provided by the present disclosure may be combined with each other without causing conflicts, and will not be elaborated in detail.

[0059] In embodiments of the present disclosure, terms such as "first," "second," and "third" are used only for purposes of description and are not intended to indicate or imply relative importance; the term "a plurality of" means two or more than two, unless specified otherwise. Terms such as "mounted," "connected," "coupled," "fixed" and the like should be understood broadly, and may be, for example, fixed connection, detachable connection, or integral connection; may also be direct connection or indirect connection via intervening structures. For those skilled in the art, specific meanings of the above terms in embodiments of the present disclosure may be understood according to specific situations.

[0060] In the description of embodiments of the present disclosure, terms such as "upper," "lower," "left," "right," "front" and "rear" should be construed to refer to the orientations or positions as then described or as shown in the drawings under discussion, and are only used for convenience and simplicity of the description of embodiments of the present disclosure, but do not indicate or imply that the device or unit referred to must have a particular orientation or be constructed and operated in a particular orientation. Thus, these terms shall not be construed as limitation on the embodiments of the present disclosure.

[0061] Reference throughout this specification to "an embodiment," "some embodiments," "a specific embodiment" and the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. Thus, the appearances of the phrases throughout this specification are not necessarily referring to the same embodiment or example of the present disclosure. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0062] The above description only involves preferred embodiments of the present disclosure and is not intended to limit embodiments of the present disclosure. For those skilled in the art, embodiments of the present disclosure may have various modifications and variations. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of embodiments of the present disclosure shall be included in the protection scope of embodiments of the present disclosure.

Claims

1. A lead-out structure, comprising:

a lead-out part comprising a first lead-out part and a second lead-out part, one end of the second lead-out part is connected to one side of the first lead-out part, in a width direction of the lead-out part, a width of the second lead-out part is smaller than a width of the first lead-out part, the first lead-out part is configured to electrically connected to a static contact portion of a relay;

at least one auxiliary part fixedly connected to the second lead-out part;

wherein the lead-out part is formed by a stamping process, and the auxiliary part is formed by using a remaining material after the lead-out part is formed by the stamping process.

2. The lead-out structure according to claim 1, wherein the first lead-out part is a plate-like structure, and in a thickness direction of the lead-out part, a thickness of the first lead-out part is the same as a thickness of the second lead-out part.

3. The lead-out structure according to claim 2, wherein in the thickness direction of the lead-out part, the first lead-out part has a first surface and a second surface opposite to the first surface, and the second lead-out part has a third surface and a fourth surface opposite to the third surface, wherein the first surface is flush with the third surface, and the second surface is flush with the fourth surface.

4. The lead-out structure according to claims 2 or 3, wherein in a width direction of the lead-out part, a side surface of the first lead-out part is flush with a side surface of the second lead-out part.

5. The lead-out structure according to claim 3, wherein the auxiliary part is a plate-shaped structure, and the auxiliary part is laid flat on the third surface of the second lead-out part;
in the width direction of the lead-out part, a width of the auxiliary part is less than or equal to a width of the second lead-out part.

6. The lead-out structure according to claim 1, wherein the auxiliary part and the second lead-out part are configured to connect a current transformer, a total thickness of the auxiliary part and the second lead-out part is less than or equal to a diameter of a mounting hole of the current transformer; and a maximum widths of the second lead-out part and the auxiliary part is less than or equal to a diameter of the mounting hole of the current transformer.

7. The lead-out structure according to claim 1, wherein a number of the auxiliary parts is plural, and the plural auxiliary parts are disposed at one side or at two opposite sides of the second lead-out part.

8. The lead-out structure according to claim 1, wherein a length of the auxiliary part is the same as a length of the second lead-out part.

9. A magnetic latching relay, comprising:

a base;

a contact structure disposed on the base, the contact structure comprising two elastic pieces parallel with each other, each elastic piece has a static contact portion and a movable contact portion;

a lead-out structure according to any of claims 1-8, a first lead-out part of the lead-out structure is connected to one end of the static contact portion of one of the two elastic pieces parallel with each other, a second lead-out part of the lead-out structure extends out of the base from a side of the base;

a current transformer disposed outside the base, the current transformer has a mounting hole, the second lead-out part and the auxiliary part of the lead-out structure are inserted into the mounting hole, and the ends of the second lead-out part and the auxiliary part away from the first lead-out part extends out of the mounting hole.

10. The magnetic latching relay according to claim 9, further comprising:
a push card disposed on the base, one end of the push card is connected to the movable contact portion, and the push card is located below the second lead-out part and can move below the second lead-out part.

Drawing