ELECTRIC SWITCH

Abstract

 Electric switch (1) including: a main body (2), to which a first button (11) and a second button (12) are connected, each button (11, 12) being movable between a rest position and an operating position, a first lever (21) and a second lever (22) which are connected to the main body (2) and which can rotate about a first rotation axis (A1) and a second rotation axis (A2), respectively, the first rotation axis (A1) and second rotation axis (A2) being mutually parallel,
a first movable contact (31) which is connected to the first lever (21) and which is movable between an open position, in which it is spaced apart from a first fixed contact (41), and a closed position, in which it is in contact with the first fixed contact (41), and a second movable contact (32) which is connected to the second lever (22) and which is movable between an open position, in which it is spaced apart from a second fixed contact (32), and a closed position, in which it is in contact with the second fixed contact (32). The first lever (21) is rotatable by means of the first button (11) and the second lever (22) is rotatable by means of the second button (12). Each lever (21, 22) comprises a fulcrum portion (3), along which the respective rotation axis (A1, A2) passes, and a receiving portion (4), against which the corresponding button (11, 12) moves into abutment.
The levers (21, 22) are positioned in the main body (2) so as to be opposite each other and so that the fulcrum portions (3) are interposed between the receiving portions (4). Preferably, the switch (1) comprises an interlocking device (34) which is interposed between the levers (21, 22) and which is suitable for preventing the simultaneous rotation of both levers (21, 22).

Description

[0001] The present invention relates to an electric switch which is capable of controlling the opening and closing of an electric contact.

[0002] In the technical field of civil and industrial electric plants, switches of the electrical/mechanical type are commonly used, by means of which electric contacts are closed or commutated, for example, for switching on or off light points or for opening and closing shutters.

[0003] In one of the most common configurations thereof, the switches comprise a movable contact which can be moved between an open position, in which the movable contact is spaced apart from a fixed contact, and a closed position, in which the movable contact is in contact with the fixed contact. The interface with which a user interacts with the switch generally comprises a button.

[0004] The present invention relates to an electric switch of the type comprising two buttons.

[0005] These types of switches which combine the presence of a plurality of buttons are particularly complex and may have a great variety of disadvantages.

[0006] For example, they may require an excessive travel of the buttons, therefore not being very ergonomic. It is also possible for them to require a specific actuation force for the buttons, giving a sensation which is not very pleasant for the users. It may further be the case that the switch may become impeded and the switching of the electric contact is not carried out despite one of the two buttons being actuated. The electric switch can advantageously be configured as an electric module which can be connected to a support frame which can be installed on the wall. The support frame preferably comprises a plurality of insertion slots to which respective electric modules can be connected. The support frame is usually connected to a box which is inserted into a cavity of the wall. This box further has to receive electric elements, for example, electric wires which are connected to the electric modules. It may be the case that these electric wires are connected in a chaotic manner because the spaces available are limited.

[0007] The technical problem addressed by the present invention is therefore to provide an electric switch which is structurally and functionally configured to at least partially overcome one or more of the disadvantages set out with reference to the cited prior art.

[0008] In the context of this problem, an object of the present invention is to provide an electric switch which is particularly reliable and which does not become impeded.

[0009] Another object is to provide an electric switch having particularly contained dimensions.

[0010] Another object is to provide an electric switch which can be connected to a support frame connected to a box which allows to obtain an arrangement of electric elements particularly orderly in said box.

[0011] Another object is to provide an electric switch which is particularly stable and resistant.

[0012] Another object is to provide an electric switch which is ergonomic and readily able to be operated by the user.

[0013] This problem is solved and this object is achieved by the invention by means of an electric switch comprising a main body, a first button and a second button and a first lever and a second lever. The first button and second button are connected to the main body. Each button is movable between a rest position and an operating position. The first lever and second lever are connected to the main body and can rotate about a first rotation axis and a second rotation axis, respectively. The first rotation axis and second rotation axis are preferably mutually parallel.

[0014] Preferably, the switch comprises a first and second movable contact and a first and second fixed contact. Advantageously, the first movable contact is connected to the first lever and is movable between an open position, in which it is spaced apart from the first fixed contact, and a closed position, in which it is in contact with the first fixed contact. Preferably, the second movable contact is connected to the second lever and is movable between an open position, in which it is spaced apart from the second fixed contact, and a closed position, in which it is in contact with the second fixed contact. Preferably, the first movable contact is fixed to the first lever and moves in a manner fixedly joined to the first lever. Advantageously, the second contact is fixed to the second lever and moves in a manner fixedly joined to the second lever. Preferably, the first lever is rotatable by means of the first button which abuts the first lever so that the movement of the first button from the rest position to the operating position causes the rotation of the first lever by moving the first movable contact from the open position to the closed position. Advantageously, the second lever is rotatable by means of the second button which abuts the second lever in such a manner that the movement of the second button from the rest position to the operating position causes the rotation of the second lever by moving the second movable contact from the open position to the closed position. Preferably, each lever comprises a fulcrum portion, along which the respective rotation axis passes, and a receiving portion, against which the corresponding button moves into abutment.

[0015] Advantageously, the levers are positioned in the main body so as to be opposite each other and so that the fulcrum portions are interposed between the receiving portions. As a result of this arrangement of the levers, it is possible to limit the spatial requirements in the main body. In particular, because the fulcrum portions are the ones through which the respective rotation axes pass and which are therefore not subjected to excursion, it is possible to limit the spatial requirement of the main body at the fulcrum portions.

[0016] Advantageously, the first lever and the second lever are identical to each other. Preferably, each lever comprises a first end and a second end. These ends are advantageously opposite each other. Preferably, the lever comprises an intermediate portion which is arranged between the first end and the second end. Advantageously, the fulcrum portion is placed at the first end of the lever. Preferably, the receiving portion is placed at the intermediate portion of the lever. Advantageously, the fulcrum portion has a tubular shape, even more advantageously a cylindrical shape.

[0017] Preferably, the two movable contacts can activate the same circuit.

[0018] Alternatively, the two movable contacts can advantageously activate two different circuits. In this case, the switch allows interaction with two different circuits depending on whether the first or second button is pressed.

[0019] The switch allows regulation of the activation of the device which is connected or the devices which are connected to the switch by means of an extended pressing of the button. For example, it is possible to regulate the degree of opening of a shutter by keeping the button pressed for more time or less time.

[0020] The switch can advantageously be configured as an electric module which can be connected to a support frame which can be fixed to a wall. The support frame can preferably comprise a plurality of insertion slots to which respective electric modules can be connected. The support frame may advantageously be connected to a box which can be inserted in a cavity of the wall. Preferably, this box can receive electric elements, for example, electric wires which are connected to respective electric modules. Advantageously, these electric wires can be connected to terminal boards by the electric switch. Advantageously, the fixed contacts are connected to the terminal boards which are also inserted in the main body.

[0021] Advantageously, the main body is in the form of a box-shaped body. Preferably, the main body can be connected to the support frame. Preferably, the main body comprises a support for a button and lower body. Advantageously, the buttons are connected to the button support. Preferably, the main body comprises a central region and two lateral regions. Advantageously, the central region is interposed between the lateral regions.

[0022] Preferably, each button comprises a button body and a button cover.

[0023] In a Cartesian coordinate system which is associated with the main body, it is advantageously possible to define a longitudinal direction, a transverse direction and a sliding direction. These directions are perpendicular to each other. Advantageously, the first rotation axis and second rotation axis are parallel with the transverse direction. When the first button or second button are in rest positions, an upper surface of the first or second button can be advantageously aligned with a plane which is parallel with the plane defined by the longitudinal direction and the transverse direction. In other words, the buttons are aligned in the longitudinal direction when they are in a rest position.

[0024] Preferably, when the first button is moved from the rest position to the operating position, it abuts the first lever, causing it to rotate in a first rotation direction. Advantageously, when the second button is moved from the rest position to the operating position, it abuts the second lever, causing it to rotate in a second rotation direction counter to the first one. For example, the first rotation direction may be clockwise and the second rotation direction may be counterclockwise, or vice versa. When the button is moved into an operating position, the corresponding lever is rotated so as to be preferably aligned in the longitudinal direction.

[0025] Preferably, the distance between the fulcrum portions in the longitudinal direction is less than the distance between the receiving portions in the longitudinal direction.

[0026] In other words, in the longitudinal direction, the distance between the first rotation axis and second rotation axis is advantageously less than the distance between a first interface and a second interface, this first interface being the one between the first button and the receiving portion of the first lever and this second interface being the one between the second button and the receiving portion of the second lever. In other words, the fulcrum portions are longitudinally arranged between the receiving portions.

[0027] In this manner, the fulcrum portions can be positioned in the central region of the main body. Since it is possible to limit the spatial requirement of the main body at the fulcrum portions, as described above, by positioning the fulcrum portions in the central region of the main body, it is possible to limit the spatial requirement of the central region. Consequently, in the sliding direction, the spatial requirement of the central region is advantageously less than the spatial requirement of the lateral regions. If the electric switch is connected to the support frame which is connected to the box which can be inserted in the cavity of the wall, the reduction of the dimensions of the switch allows more space to be made available in the box. In particular, there is then generated between the central region and the lateral regions an empty space which may be, for example, used to receive electric elements, for example, electric wires. This allows an arrangement which is particularly ordered of the elements in the box to be obtained.

[0028] Preferably, the main body comprises a central housing. This central housing is advantageously positioned in the central region. Preferably, the main body comprises two lateral housings. Advantageously, these lateral housings are positioned in the respective lateral regions. Preferably, the central housing is positioned between the two lateral housings.

[0029] Preferably, the main body comprises lever seats which are suitable for receiving respective fulcrum portions of the levers. Advantageously, these lever seats are positioned in the central housing of the main body. The connection between the levers and the main body is advantageously brought about by means of the fulcrum portions which are inserted in the respective lever seats of the main body in a rotatable manner.

[0030] Preferably, each lateral housing is suitable for receiving the intermediate portion and the second end of the respective lever. Therefore, the receiving portion of the lever is advantageously positioned in the respective lateral housing. The central housing advantageously has a volume less than the lateral housings because the fulcrum portion is not subjected to excursion while the intermediate portion and the second end are subjected to excursion. In particular, the second end of the lever can be the end subjected to the greatest excursion.

[0031] Preferably, the lever seats have a shape which complements the respective fulcrum portions.

[0032] In a preferred embodiment, the first button and second button are configured as axial buttons which can be moved in translation in the sliding direction between the rest position and the operating position.

[0033] The axial buttons are advantageously able to be moved in translation from the rest position to the operating position by applying a pressure thereto. This pressure is preferably directed towards the main body in the sliding direction so that the axial button moves in translation towards the interior of the main body. Advantageously, each of the axial buttons, without rotating, remains arranged parallel with the longitudinal direction during the movement therefore between the rest position and the operating position. Advantageously, each axial button can move independently in translation in the sliding direction between the rest position and the operating position. Each lever is preferably rotatable by means of abutment of the corresponding axial button which abuts this lever in such a manner that the translational movement of the axial button from the rest position to the operating position causes a rotation of the respective lever, the rotation being such that the movable contact which is connected to the lever is moved between the open position and the closed position. The use of axial buttons allows a rotation of the levers which is particularly precise as a result of a high level of stability during the translational movement of the button to be obtained.

[0034] Each axial button preferably comprises a sliding element which can slide in a respective groove of the main body. The connection between the axial buttons and the main body is advantageously brought about by means of the sliding elements which slide in the respective grooves of the main body.

[0035] The lever allows the translational movement of the respective axial button to be limited, limiting the dimensions of the electric switch particularly in the sliding direction.

[0036] In an alternative embodiment, the buttons are configured as rocker buttons. These rocker buttons are rotatable about respective rotation axes which are preferably parallel with the rotation axes of the levers. The rotation axes of the rocker buttons are advantageously positioned at an end of the rocker buttons. Preferably, the rocker buttons are mounted so as to be opposite each other.

[0037] The rocker buttons are advantageously rotatable from the rest position to the operating position by applying a pressure thereto. This pressure is preferably directed towards the main body in the sliding direction so as to rotate the rocker button towards the interior of the main body. Preferably, this pressure is applied to the opposite end with respect to the end from which the rotation axis of the rocker button passes. Each rocker button can advantageously rotate about the respective rotation axis. Each lever is preferably rotatable by means of abutment of the corresponding rocker button which abuts this lever so that the rotation of the rocker button from the rest position to the operating position causes a rotation of the respective lever, the rotation being such that the movable contact which is connected to the lever is moved between the open position and the closed position. Using rocker buttons allows a particularly simple connection with respect to the main body and therefore a cost saving to be obtained. Each rocker button may comprise a pair of transverse pins which can be inserted in respective seats of the main body. The connection between rocker buttons and the main body is advantageously brought about by means of the pairs of transverse pins which are rotatably inserted in the respective seats of the main body. Preferably, when the rocker button is in a rest position, it is aligned with a plane parallel with the plane defined by the longitudinal direction and by the transverse direction. Advantageously, when the rocker button is in an operating position, it is misaligned with respect to the plane. Preferably, the rocker button, by moving between the rest position and the operating position, defines an inclination angle. Preferably, a greatest inclination angle of the lever will correspond to a specific inclination angle of the rocker button. Therefore, the lever allows the inclination angle of the rocker button to be limited, limiting the dimensions of the electric switch particularly in the sliding direction.

[0038] In a preferred embodiment, the switch comprises an interlocking device which is interposed between the levers and which is suitable for preventing the simultaneous rotation of both levers.

[0039] The interlocking device prevents simultaneous pressing of the two buttons. This prevents the two buttons from being accidentally pressed at the same time by a user. The simultaneous pressing of both buttons could be particularly dangerous if movable contacts activate the same circuit.

[0040] Preferably, the interlocking device is suitable for receiving in abutment the first lever which, by applying a thrust to the interlocking device, moves it until it is moved into contact with the second lever. Given that in this condition the second lever cannot be caused to rotate, the movement is consequently prevented from the rest position to the operating position of the second button as long as the first button remains in an operating position.

[0041] Vice versa, the interlocking device is advantageously suitable for receiving in abutment the second lever which, by applying a thrust to the interlocking device, moves it until it is moved into contact with the first lever. Given that in this condition the first lever cannot be caused to rotate, the movement is consequently prevented from the rest position to the operating position of the first button as long as the second button remains in an operating position.

[0042] Preferably, the interlocking device can be positioned near the fulcrum portions of the levers. Advantageously, the interlocking device can be inserted into the central housing of the main body.

[0043] In this manner, the interlocking device can be readily rotated by means of abutment with the first end of the first or second lever.

[0044] Preferably, the interlocking device can be rotated about a third rotation axis which is parallel with the first and the second rotation axis. If the interlocking device can be rotated about the third rotation axis, it can also be referred to below as a rocker device.

[0045] If the interlocking device can be rotated about the third rotation axis, the interaction between the lever and the interlocking device is particularly gradual. This allows possible damage as a result of the abutment between the levers and rocker device to be avoided.

[0046] In an alternative embodiment, the interlocking device can be moved in translation by means of abutment of the first or second lever.

[0047] Preferably, the interlocking device comprises an active portion which is suitable for abutting an abutment portion of each lever.

[0048] Preferably, both the active portion and the abutment portion comprise planar surfaces. At the planar surfaces, the abutment between the lever and the rocker device may occur. This allows a particularly progressive abutment to take place between the lever and the rocker device.

[0049] Advantageously, the abutment portion is placed at the first end of the lever.

[0050] Preferably, the main body comprises an interlock seat which is suitable for receiving an upper end of the interlocking device. Advantageously, the interlock seat is positioned in the central housing and is interposed between the lever seats. By positioning the interlock seat between the lever seats, it is possible to obtain optimization of the spaces and therefore a reduction of the dimensions of the main body. By positioning the interlock seat between the lever seats, it is possible to facilitate the stamping and therefore to reduce the production costs of the switch.

[0051] Preferably, each movable contact is rigidly connected to the respective lever, that is to say, the first movable contact is rigidly connected to the first lever and the second movable contact is rigidly connected to the second lever. In other words, each movable contact is secured to the respective lever in a fixedly joined manner.

[0052] This allows a particularly stable connection to be obtained between the movable contact and the lever, avoiding possible occurrences of sliding which may be present if the movable contact is not rigidly connected to the lever. Furthermore, the movable contact thereby moves together with the lever for the entire duration of movement of the lever and this allows the movable contact to be fitted together with the fixed contact in a particularly precise manner in the closed position.

[0053] Preferably, each movable contact comprises a contact-carrying element and a contact portion.

[0054] Preferably, the contact portion is the movable contact portion suitable for abutting the fixed contact when the movable contact is in the closed position.

[0055] Advantageously, when the button is in the operating position, the lever is rotated so that the contact portion is aligned with the respective fixed contact. This allows a particularly reliable switching operation to be obtained. Each movable contact can preferably comprise an additional contact portion which is suitable for interfacing with a respective additional fixed contact.

[0056] Advantageously, the contact-carrying element is in the form of a plate.

[0057] Preferably, the contact-carrying element can be inserted in a groove of the respective lever. The connection between the movable contact and the respective lever is advantageously brought about by means of the contact-carrying element which is inserted in a fixed manner in the groove of the respective lever. In this manner, the connection between the lever and movable contact is particularly stable.

[0058] Preferably, the groove is placed at the receiving portion of the lever. It is thereby possible to optimize the spatial requirements.

[0059] Preferably, the contact-carrying element comprises a central portion which can be inserted in the groove and lateral portions, on which respective contact portions are mounted. In this manner, a plurality of movable contacts can move into contact, in the closed position, with a respective plurality of fixed contacts.

[0060] Preferably, the central portion has a form which complements the form of the groove. Advantageously, both the groove and the central portion have a planar formation.

[0061] Preferably, the lateral portions are transversely opposite each other.

[0062] Advantageously, the lateral portions are formed so as to allow the contact portions to be aligned with the relevant fixed contacts when the movable contact is in a closed position. Preferably, the fixed contacts are connected to the terminal boards so as to extend mainly along a plane which is substantially parallel with the plane defined by the longitudinal direction and the transverse direction. Preferably, the lateral portions are formed so as to close a plurality of contacts at the same time.

[0063] Preferably, the receiving portion of each lever is raised towards the corresponding button.

[0064] The receiving portion is advantageously raised with respect to the intermediate portion of the lever.

[0065] In the embodiment in which the axial button is present, the raised receiving portion allows the lever to abut with a smaller translational movement of the axial button.

[0066] Limiting the translational movement of the axial button towards the interior of the main body allows the actuation thereof to be made easier, making the electric switch more ergonomic because the user does not have to move the axial button excessively in translation in terms of depth towards the main body.

[0067] In the embodiment in which the rocker button is present, the raised receiving portion allows the lever to be moved into abutment with a smaller inclination angle of the rocker button. Limiting the inclination angle of the rocker button towards the interior of the main body allows the actuation thereof to be made easier, making the electric switch more ergonomic because the user does not have to depress the rocker button excessively towards the interior of the main body.

[0068] Preferably, each button comprises a projecting portion which is suitable for abutting the respective lever in order to rotate it.

[0069] Advantageously, the projecting portion is suitable for abutting the receiving portion of the lever. Preferably, the button body comprises the projecting portion.

[0070] In the embodiment in which the axial button is present, the raised projecting portion allows the lever to be moved into abutment with a smaller translational movement of the axial button. This smaller translational movement affords the advantages described above for the raised receiving portion.

[0071] In the embodiment in which the rocker button is present, the projecting portion allows the lever to be moved into abutment with a smaller inclination angle of the rocker button. This smaller inclination angle affords the advantages described above for the raised receiving portion.

[0072] The raised receiving portion of the lever and the projecting portion of the button therefore both contribute to making the switch more ergonomical in terms of the actuation thereof.

[0073] Preferably, the electric switch comprises a return mechanism which is configured to move the button into the rest position. Advantageously, the return mechanism includes resilient elements which are suitable for abutting each lever so that the rotation of the lever moves the corresponding button into a rest position.

[0074] A resilient force of each resilient element advantageously urges the respective lever in order to rotate it. During this rotation, the lever abuts the button, moving it from the operating position to the rest position. This rotation of the lever has a direction counter to the rotation of the lever when the button is moved from the rest position to the operating position.

[0075] The button can be moved from the rest position to the operating position when the pressure applied to the button is such as to overcome the resilient force of the corresponding resilient element. The button may remain in an operating position and therefore the movable contact may remain in the closed position as long as the pressure applied to the button is such as to overcome the resilient force of the corresponding resilient element. When the pressure is no longer such as to overcome the resilient force, the return mechanism advantageously moves the button into a rest position and consequently the movable contact returns to an open position. In this manner, it may be possible to regulate the activation of the device which is connected to the switch by means of an extended pressure of the button. For example, it is possible to regulate the degree of opening of a shutter by keeping the button pressed in an operating position for more time or less time. Once the button is released, it advantageously returns to the rest position and the shutter closes because the movable contact is placed in an open position.

[0076] Preferably, each lever comprises a protuberance which can be inserted in the corresponding resilient element.

[0077] By this insertion, it is possible to increase the stability of the return mechanism, limiting the relative movements between the lever and the respective resilient element. Advantageously, this protuberance projects at the opposite side to the receiving portion of the lever, that is to say, the protuberance faces towards the fixed contact.

[0078] Preferably, the protuberance is placed at the second end of the lever.

[0079] Advantageously, the protuberance has a substantially cylindrical form, even more advantageously a conical form. The insertion of the protuberance into the respective resilient element is thereby facilitated.

[0080] Preferably, the resilient elements are formed as helical springs. Advantageously, each resilient element comprises a first end and a second end. Preferably, the protuberance can be inserted from the first end of the corresponding resilient element. Each resilient element has a second end which is preferably in abutment with the main body, even more preferably with the lower body. The main body may comprise a blind cavity which is suitable for receiving the second end of the first resilient element. This blind cavity allows the stability of the return mechanism to be increased.

[0081] The features and additional advantages of the invention will be better appreciated from the following detailed description of a preferred though non-exclusive embodiment thereof which is illustrated by way of non-limiting example with reference to the appended drawings, in which:

Figure 1 is a perspective view of the electric switch of the present invention;

Figure 2 is a front view of a longitudinal section of the switch without the main body and the return mechanism;

Figure 3 is a perspective view of the main body in which the button support is separated from the lower body;

Figures 4 and 5 are a lower perspective view and a longitudinal section of the button support, respectively;

Figure 6 is a perspective view of the button, in which the rocker button cover is separated from the button body;

Figures 7 and 8 are a first perspective view and a second perspective view of the lever, respectively;

Figure 9 is a perspective view of the interlocking device.

[0082] With reference to the Figures, an electric switch is generally designated 1.

[0083] The electric switch 1 comprises a main body 2, a first button 11 and a second button 12 and a first lever 21 and a second lever 22. The first button 11 and the second button 12 are connected to the main body 2. Each button 11, 12 can be moved between a rest position and an operating position. The first lever 21 and the second lever 22 are connected to the main body 2 and can be rotated about a first rotation axis A1 and a second rotation axis A2, respectively. The first rotation axis A1 and the second rotation axis A2 are preferably parallel with each other. The first lever 21 and the second lever 22 are preferably identical to each other.

[0084] The switch 1 comprises a first movable contact 31 and a second movable contact 32 and a first fixed contact 41 and a second fixed contact 42. The first movable contact 31 is connected to the first lever 21 and is movable between an open position, in which it is spaced apart from the first fixed contact 41, and a closed position, in which it is in contact with the first fixed contact 41. The second movable contact 32 is connected to the second lever 22 and is movable between an open position, in which it is spaced apart from the second fixed contact 42, and a closed position, in which it is in contact with the second fixed contact 42. Figure 2 shows the first movable contact 31 and the second movable contact 32 which are both in an open position.

[0085] The first lever 21 is rotatable by means of the first button 11 which abuts the first lever 21 so that the movement of the first button 11 from the rest position to the operating position causes the rotation of the first lever 21, moving the first movable contact 31 from the open position to the closed position. The second lever 22 is rotatable by means of the second button 21 which abuts the second lever 22 so that the movement of the second button 21 from the rest position to the operating position causes the rotation of the second lever 22 by moving the second movable contact 32 from the open position to the closed position. Each lever 21, 22 comprises a fulcrum portion 3, along which the respective rotation axis A1, A2 passes, and a receiving portion 4, against which the corresponding button 11, 12 moves into abutment.

[0086] The levers 21, 22 are positioned in the main body 2 so as to be opposite each other and so that the fulcrum portions 3 are positioned between the receiving portions 4. Each lever 21, 22 comprises a first end 5 and a second end 6. These ends 5, 6 are opposite each other. The lever 21, 22 comprises an intermediate portion 10 which is positioned between the first end 5 and the second end 6. The fulcrum portion 3 is positioned at the first end 5 of the lever 21, 22. The receiving portion 4 is placed at the intermediate portion 10 of the lever 21, 22. The fulcrum portion 3 may have a tubular, cylindrical form.

[0087] Each button 11, 12 advantageously comprises a button body 13 and a button cover 14, as shown in Figure 6 for the first button 11.

[0088] In a Cartesian coordinate system XYZ which is associated with the main body 2, it is possible to define a longitudinal direction X, a transverse direction Y and a sliding direction Z. These directions are perpendicular to each other. The first rotation axis A1 and the second rotation axis A2 are advantageously parallel with the transverse direction Y. When the first button 11 or the second button 12 are in rest positions, an upper surface 15 of the first button or second button can advantageously be aligned with a plane parallel with the plane defined by the longitudinal direction X and the transverse direction Y. In other words, the buttons 11, 12 are aligned in the longitudinal direction X when they are in a rest position. This upper surface 15 can be the surface of the button cover 13.

[0089] It will be appreciated that, in the present embodiment, the switch 1 is configured as an electric module which can be connected to a support frame which can be fixed to a wall. The support frame may comprise a plurality of insertion slots, to which respective electric modules can be connected. The support frame can be connected to a box which can be inserted into a cavity of the wall. This box can receive electric elements, for example, electric wires which are connected to respective electric modules. These electric wires can be connected to terminal boards 7 by the switch 1. The fixed contacts 41, 42 are fixed to the terminal boards 7 which are also inserted in the main body 2. The fixed contacts 41, 42 are connected to the terminal boards 7 so as to extend mainly along a plane substantially parallel with the plane defined by the longitudinal direction X and the transverse direction Y.

[0090] The main body 2 may be in the form of a box-shaped body. The main body comprises a button support 8 and a lower body 9, as shown in Figure 3. The buttons 11, 12 are advantageously connected to the button support 8.

[0091] The main body 2 may be connectable to the support frame. Advantageously, the main body 2 comprises fixing portions 60 which are provided for connecting the electric switch 1 to the support frame. The fixing portions 60 can be present on the button support 8. Preferably, the lower body 9 comprises first connection portions 61 which can be inserted in respective second connection portions 62 of the button support 8.

[0092] The button body 13 preferably comprises an opening 16 which is suitable for receiving a respective connection element 17 of the rocker button cover 8. It is possible to obtain, by means of this connection, a reduction of the dimensions of the switch 1, in particular in the sliding direction Z.

[0093] In the embodiment of Figure 2, when the first button 11 is moved from the rest position to the operating position, it abuts the first lever 21, making it rotate in a counterclockwise direction, and when the second button 12 is moved from the rest position to the operating position, it abuts the second lever 22, making it rotate in a clockwise direction. When the buttons 11, 12 are in an operating position, the levers 21, 22 are rotated so as to be preferably aligned with the longitudinal direction X. The main body 2 may comprise a central region 18 and two lateral regions 19, where the central region 18 is positioned between the lateral regions 19.

[0094] The distance d in the longitudinal direction X between the fulcrum portions 3 is less than the distance D in the longitudinal direction X between the receiving portions 4.

[0095] In other words, along the longitudinal direction X, the distance d between the first rotation axis A1 and the second rotation axis A2 is less than the distance D between a first interface T1 and a second interface T2. This first interface T1 is the interface between the first button 11 and the receiving portion 4 of the first lever 21 and this second interface T2 is the interface between the second button 12 and the receiving portion 4 of the second lever 22.

[0096] The fulcrum portions 3 can be positioned in the central region 18 of the main body 2. In the sliding direction Z, the spatial requirement h of the central region 18 is advantageously less than the spatial requirement H of the lateral regions 19. There is generated between the central region and lateral regions an empty space 23. The spatial requirement H of the switch 1 at the lateral regions 19 in the sliding direction Z is preferably between approximately 22 and 26 mm, even more preferably of approximately 24 mm. The spatial requirement h of the switch 1 in the central region 18 is preferably between approximately 16.5 mm and 20.5 mm, even more preferably of approximately 18.5 mm.

[0097] The main body 2 may comprise a central housing 24. This central housing 24 is positioned in the central region 18. The main body 2 may comprise two lateral housings 25. These lateral housings 25 are positioned in the respective lateral regions 19. The central housing 24 is positioned between the two lateral housings 25.

[0098] The main body 2 comprises lever seats 26 which are suitable for receiving respective fulcrum portions 3 of the levers 21, 22. These lever seats 26 are positioned in the central housing 24 of the main body 2.

[0099] Each lateral housing 25 is suitable for receiving the intermediate portion 10 and the second end 6 of the respective lever 21, 22. Therefore, the receiving portion 4 of the lever 21, 22 is also positioned in the respective lateral housing 25.

[0100] The central housing 24 may have a smaller volume than the lateral housings 25 because the fulcrum portion 3 is not subjected to excursion while the intermediate portion 10 and the second end 6 are subjected to excursion, in particular the second end 6 of the lever 21, 22 and therefore require a more extensive housing for carrying out this excursion.

[0101] The central housing 24 can be separated from the lateral housings 25 by means of respective transverse walls 27. The housings 24, 25 can be defined between the button support 8 and the lower body 9.

[0102] In the embodiment illustrated, the two levers 21, 22 are connected to the main body 2 so as to be opposite each other with respect to a plane of symmetry which passes through a centre of the central region 18. This plane of symmetry is advantageously parallel with a plane which is defined by the transverse direction Y and the sliding direction Z.

[0103] In the embodiment illustrated, the first button 11 and the second button 12 are configured as axial buttons, which can move in translation in the sliding direction Z between the rest position and the operating position. In Figure 2, these buttons 11, 12 are shown in a rest position.

[0104] The axial buttons 11, 12 are advantageously movable in translation from the rest position to the operating position by applying a pressure thereto. This pressure is preferably directed towards the main body 2 in the sliding direction Z so as to move the axial button 11, 12 in translation towards the interior of the main body 2. The axial buttons 11, 12, without rotating, remain arranged parallel with the longitudinal direction X during the movement thereof between the rest position and the operating position.

[0105] Each axial button 11, 12 can move independently in translation in the sliding direction Z between the rest position and the operating position. Each lever 21, 22 can be rotated by means of abutment of the corresponding axial button 11, 12 which abuts this lever 21, 22 so that the translational movement of the axial button 11, 12 from the rest position to the operating position causes rotation of the respective lever 21, 22, the rotation being such that the movable contact 31, 32 which is connected to the lever 21, 22 is moved between the open position and the closed position.

[0106] Each axial button 11, 12 may comprise a sliding element 29 which can slide in a respective groove 20 of the main body 2. Each sliding element 29 may comprise a recess 33 which is suitable for moving into abutment against a respective locking element 33 of the corresponding groove 20. This locking element 33 serves to lock the translational movement of the axial button 11, 12 in a rest position.

[0107] In the embodiment illustrated, the switch 1 comprises an interlocking device 34 which is interposed between the levers 21, 22 and which is suitable for preventing the simultaneous rotation of both the levers 21, 22.

[0108] The interlocking device 1 prevents the two buttons 11, 12 from being pressed simultaneously.

[0109] The interlocking device 34 is suitable for receiving in abutment the first lever 21 which, by applying a thrust to the interlocking device 34, moves it until it is moved into contact with the second lever 22. Vice versa, the interlocking device 34 is suitable for receiving in abutment the second lever 22 which, by applying a thrust to the interlocking device 34, moves it until it is moved into contact with the first lever 21.

[0110] The operating principle of the interlocking device 34 may be as follows.

[0111] If, initially, the first button 11 is moved from the rest position to the operating position, the first lever 21 is rotated and abuts the interlocking device 34. By means of this abutment, the interlocking device 34 is moved and moves into abutment against the second lever 22, which cannot therefore be rotated. This consequently prevents the movement from the rest position to the operating position of the second button 12 as long as the first button 11 remains in the operating position. The same operation is carried out mutatis mutandis when the second button 12 is initially moved from the rest position to the operating position. The interlocking device 34 can be positioned near the fulcrum portions 3 of the levers 21, 22. The interlocking device 34 can be inserted in the central housing 24.

[0112] The interlocking device 34 can be rotated about a third rotation axis A3 which is parallel with the first rotation axis A1 and the second rotation axis A2.

[0113] The interlocking device 34 comprises an active portion 36 which is suitable for abutting an abutment portion 37 of each lever 21, 22.

[0114] The abutment portion 37 may comprise a first planar surface 38. The active portion 36 may comprise a second planar surface 39, preferably a pair of second planar surfaces 39 which are longitudinally opposite each other. The first planar surface 38 is suitable for abutting the second planar surface 39.

[0115] The rocker device 34 may comprise an upper end 43 and a lower end 44, which are opposite each other in the sliding direction Z. The upper end may be the end along which the third rotation axis A3 passes. This upper end may be of tubular form, preferably cylindrical. The active portion 36 can be positioned at the lower end 44. The rocker device 34 may comprise a central portion 45 which is positioned between the upper end 43 and the lower end 44.

[0116] The central housing 24 may comprise a lower support surface 46 which is suitable for abutting the lower end 44 of the interlocking device 34. The lower end 44 may comprise a third surface 47 which is suitable for interfacing with the lower support surface 46. Preferably, both the lower support surface 46 and the third surface 47 are curved. This allows the rotation of the rocker device 34 to be promoted.

[0117] The abutment portion 37 can be placed at the first end 5 of the lever 21, 22. The abutment portion 37 can extend in the lower region from the fulcrum portion 3.

[0118] The lever seats 26 may be of cylindrical form. The lever seats 26 may comprise an upper portion and a lower support portion. Preferably, the upper portion is positioned on the button support 8 and the lower support portion is positioned on the lower body 9. The lower support portion may be suitable for supporting the fulcrum portion 3 of the lever 21, 22. This ensures particularly stable support of the fulcrum portion 3. The lower support portion may comprise a rectilinear portion 48 and a blind cavity 28. Preferably, a transverse end 66 of the fulcrum portion 3 can move into abutment against the blind cavity 28. The rectilinear portion 48 may advantageously comprise a recess 49 which is suitable for receiving the abutment portion 37 of the lever 21, 22.

[0119] The main body 2 may comprise an interlock seat 50 which is suitable for receiving the upper end 43 of the interlocking device 34. The interlock seat 50 may be positioned in the central housing 24 and it is interposed between the lever seats 26.

[0120] The interlock seat 50 may be positioned in the button support 8. The interlock seat 50 may be of tubular, preferably cylindrical, form.

[0121] Each movable contact 31, 32 may comprise a contact-carrying element 51 and a contact portion 52.

[0122] The contact portion 52 is the movable contact portion 31, 32 which is suitable for abutting the fixed contact 41, 42 when the movable contact 31, 32 is in a closed position.

[0123] When the button 11, 12 is in an operating position, the lever 21, 22 is rotated so that the contact portion 52 is aligned with the respective fixed contact 41, 42. Each movable contact 31, 32 may preferably comprise an additional contact portion 52 which is suitable for interfacing with a respective additional fixed contact. In the embodiment described, the switch 1 comprises an additional first fixed contact and an additional second fixed contact, both of which are not depicted.

[0124] The contact-carrying element 51 can be in the form of a plate. The contact-carrying element 51 may be able to be inserted in a groove 53 which is present in the lever 21, 22. The groove 53 is formed and is preferably positioned at the receiving portion 4 of the lever 21, 22. Advantageously, the groove 53 is formed between the receiving portion 4 and the intermediate portion 10 of the lever 21, 22.

[0125] The contact-carrying element 51 may comprise a central portion 54 which can be inserted in the groove 53 and lateral portions 55, on which respective contact portions 52 are mounted.

[0126] The central portion 54 may have a form which complements the form of the groove 53. Both the groove 53 and the central portion 54 can have a planar formation. Advantageously, both the groove 53 and the central portion 54 extend in a plane parallel with the plane defined by the longitudinal direction X and the transverse direction Y.

[0127] The lateral portions 55 can be opposite each other transversely. The lateral portions 55 can be formed so as to allow the contact portions 52 to be aligned with the relevant fixed contacts 41, 42 when the movable contact 31, 32 is in a closed position. The lateral portions 55 can preferably have an L-shaped formation, as can be seen in Figures 7 and 8. The L-shaped formation is advantageously sized so that, when the movable contact 31, 32 is in a closed position, the contact portions 52 can move into contact with the respective fixed contacts 41, 42 at the same time.

[0128] The receiving portion 4 of each lever 21, 22 can be raised towards the corresponding button 11, 12. The receiving portion 4 is advantageously raised with respect to the intermediate portion 10 of the lever 21, 22. The receiving portion may have a T-shaped formation.

[0129] Each button 11, 12 may comprise a projecting portion 56 which is suitable for abutting the respective lever 21, 22 in order to move it in rotation.

[0130] The projecting portion 56 is advantageously suitable for abutting the receiving portion 4 of the lever 21, 22. The projecting portion 56 can be contained in the button body 14.

[0131] The projecting portion 56 preferably extends in the sliding direction Z. The projecting portion 56 can be positioned in a lower housing 57 which is formed under the button body 14.

[0132] The electric switch 1 may comprise a return mechanism (not depicted) which is configured to move the button 11, 12 into the rest position. Advantageously, the return mechanism includes resilient elements which are suitable for abutting each lever 21, 22 so that the rotation of the lever 21, 22 moves the corresponding button 11, 12 into a rest position.

[0133] A resilient force of each resilient element advantageously urges the respective lever 21, 22 in order to rotate it. In the embodiment of Figure 2, a resilient element is suitable for urging the first lever 21 so as to move it in a clockwise direction and this rotation moves the first button 11 from the operating position to the rest position; an additional resilient element is suitable for urging the second lever 22 so as to rotate it in a counterclockwise direction and this rotation moves the second button 12 from the operating position to the rest position.

[0134] The locking element 33 is advantageously suitable for locking the axial button 11, 12 in a rest position, blocking the translational movement of the axial button 11, 12 as a result of the return mechanism.

[0135] Each lever 21, 22 may comprise a protuberance 58 which can be inserted in the corresponding resilient element.

[0136] This protuberance 58 advantageously projects from the opposite side to the receiving portion 4 of the lever 21, 22, or the protuberance 58 faces towards the fixed contact 41, 42.

[0137] The protuberance 58 is preferably positioned at the second end 6 of the lever 21, 22.

[0138] The protuberance 58 may have a substantially conical shape.

[0139] The resilient elements can be in the form of helical springs.

[0140] Advantageously, each resilient element comprises a first end and a second end. The protuberance 58 can preferably be inserted from the first end of the corresponding resilient element. Each resilient element has a second end which is preferably in abutment against the lower body 9. The lower body 9 may comprise a blind cavity 59 which his suitable for receiving the second end of the first resilient element.

Claims

1. An electric switch (1) including:

a main body (2), to which a first button (11) and a second button (12) are connected, each button (11, 12) being movable between a rest position and an operating position,

a first lever (21) and a second lever (22) which are connected to the main body (2) and which can rotate about a first rotation axis (A1) and a second rotation axis (A2), respectively, the first rotation axis (A1) and second rotation axis (A2) being mutually parallel,

a first movable contact (31) which is connected to the first lever (21) and which is movable between an open position, in which it is spaced apart from a first fixed contact (41), and a closed position, in which it is in contact with the first fixed contact (41), and

a second movable contact (32) which is connected to the second lever (22) and which is movable between an open position, in which it is spaced apart from a second fixed contact (32), and a closed position, in which it is in contact with the second fixed contact (32),

the first lever (21) being rotatable by means of the first button (11) which abuts the first lever (21) so that the movement of the first button (11) from the rest position to the operating position causes the rotation of the first lever (21) by moving the first movable contact (31) from the open position to the closed position,

the second lever (22) being rotatable by means of the second button (12) which abuts the second lever (22) in such a manner that the movement of the second button (12) from the rest position to the operating position causes the rotation of the second lever (22) by moving the second movable contact from the open position to the closed position,

each lever (21, 22) comprising a fulcrum portion (3), along which the respective rotation axis (A1, A2) passes, and a receiving portion (4), against which the corresponding button (11, 12) moves into abutment,

the levers (21, 22) being positioned in the main body (2) so as to be opposite each other and so that the fulcrum portions (3) are interposed between the receiving portions (4).

2. An electric switch (1) according to the preceding claim, wherein, in a longitudinal direction (X), the distance (d) between the fulcrum portions (3) is less than the distance (D) between the receiving portions (4).

3. An electric switch (1) according to any one of the preceding claims, wherein the first button (11) and the second button (12) are configured as axial buttons, which can be moved in translation in a sliding direction (Z) between the rest position and the operating position.

4. An electric switch (1) according to any one of the preceding claims, comprising an interlocking device (34) which is interposed between the levers (21, 22) and which is suitable for preventing the simultaneous rotation of both levers (21, 22).

5. An electric switch (1) according to the preceding claim, wherein the interlocking device (34) can be rotated about a third rotation axis (A3) which is parallel with the first (A1) and the second rotation axis (A2).

6. An electric switch according to claim 5 or 6, wherein the interlocking device comprises an active portion which is suitable for abutting an abutment portion of each lever.

7. An electric switch (1) according to any one of the preceding claims, wherein the main body (2) comprises lever seats (26) which are suitable for receiving respective fulcrum portions (3) of the levers (21, 22), said lever seats (26) being positioned in a central housing (24) of the main body (2).

8. An electric switch (1) according to the preceding claim when dependent on any one of claims 4 to 6, wherein the main body (2) comprises an interlock seat (50) which is suitable for receiving an upper end (43) of the interlocking device (34), the interlock seat (50) being positioned in the central housing (24) and being interposed between the lever seats (26).

9. An electric switch (1) according to any one of the preceding claims, wherein each movable contact (31, 32) comprises a contact-carrying element (51) and a contact portion (52), said contact-carrying element (51) being suitable for being inserted in a groove (53) of the respective lever (21, 22).

10. An electric switch (1) according to the preceding claim, wherein the contact-carrying element (51) comprises a central portion (54) which can be inserted in the groove (53) and lateral portions (55), on which respective contact portions (52) are mounted.

11. An electric switch (1) according to any one of the preceding claims, wherein the receiving portion (4) of each lever (21, 22) projects towards the corresponding button (11, 12).

12. An electric switch (1) according to any one of the preceding claims, wherein each button (11, 12) comprises a projecting portion (56) which is suitable for abutting the respective lever (21, 22) in order to rotate it.

13. An electric switch (1) according to any one of the preceding claims, comprising a return mechanism which is configured to move the button (11, 12) into the rest position, the return mechanism including resilient elements which are suitable for abutting each lever (21, 22) so that the rotation of the lever moves the corresponding button (21, 22) into a rest position.

14. An electric switch (1) according to the preceding claim, wherein each lever (21, 22) comprises a protuberance (58) which can be inserted in the corresponding resilient element.

15. An electric switch (1) according to any one of the preceding claims, wherein each movable contact (31, 32) is rigidly connected to the respective lever (21, 22).

Drawing