Contact plate and switching device

Abstract

The utility model discloses a contact plate and a switching device, and relates to the technical field of low-voltage electric appliances, the contact plate is arranged on the switching device, the switching device comprises a shell and a cover body, a connecting part is arranged on the shell, the contact plate is installed on the connecting part, and the cover body covers the shell. The contact plate is connected to the connecting part through a fastener and forms a first limiting position, and the contact plate can rotate relative to the first limiting position. The cover body is provided with a first limiting structure, the contact plate is provided with a second limiting structure matched with the first limiting structure, and after the cover body is connected with the shell, the first limiting structure and the second limiting structure are connected to form a second limiting position. A gap is formed between the first limiting position and the second limiting position, and when the first limiting position and the second limiting position act at the same time, the contact plate and the connecting part are relatively locked. According to the contact plate and the switching device provided by the embodiment of the invention, the installation stability of the contact plate can be improved, and the influence of unstable installation of the contact plate on normal use of the switching device is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to a contact plate and a switch device. Background Art

[0002] A contactor is a device that can quickly cut off the AC and DC main circuits and can frequently connect and disconnect high current control circuits. The contact plate in the contactor is used to cooperate with the wiring terminals and moving contacts to enable the contactor to control the on and off of the circuit.

[0003] In the prior art, the contactor includes a cover, a shell and a base. A contact plate is usually installed in the shell. One end of the contact plate cooperates with the terminal and the other end cooperates with the moving contact. The middle part of the contact plate is fixedly connected to the shell by screws.

[0004] However, the contact plate installed in this way may be driven to rotate together during the process of tightening the screws, and the contact plate may also become loose or rotate during the wiring of the terminal. The installation stability is low, affecting the normal use of the contactor. Utility Model Content

[0005] The purpose of the present application is to provide a contact plate and a switch device, which can improve the installation stability of the contact plate and reduce the impact of unstable installation of the contact plate on the normal use of the switch device.

[0006] In a first aspect, an embodiment of the present application provides a contact plate, wherein the contact plate is disposed on a switch device, and the switch device includes a housing and a cover body, wherein a connecting portion is disposed on the housing, the contact plate is mounted on the connecting portion, and the cover body is disposed on the housing. The contact plate is connected to the connecting portion by a fastener and forms a first limiting position, and the contact plate can rotate relative to the first limiting position. A first limiting structure is disposed on the cover body, and a second limiting structure adapted to the first limiting structure is disposed on the contact plate. After the cover body is connected to the housing, the first limiting structure is connected to the second limiting structure and forms a second limiting position. There is a gap between the first limiting position and the second limiting position, and when the first limiting position and the second limiting position act simultaneously, the contact plate and the connecting portion are relatively locked.

[0007] Based on the above-mentioned embodiments of the present application, the first limiting position and the second limiting position can be used to limit the contact plate from two points, thereby locking the contact plate on the connection part of the shell, effectively reducing the risk of the contact plate being offset or rotated after being installed on the shell, and improving the installation stability of the contact plate. In addition, the second limiting position is formed after the cover body and the shell are connected, which means that no other fixing operations are required. The second limiting position can be directly formed during the assembly of the cover body and the shell to limit the contact plate, which is simple to operate and has a relatively stable limiting effect.

[0008] In an optional embodiment, the first limiting structure is a limiting column arranged inside the cover body, the limiting column extends toward the contact plate, and the second limiting structure is a clamping portion arranged on the contact plate, and the limiting column can be connected to the clamping portion.

[0009] Based on the above embodiments of the present application, the first limiting structure is set as a limiting column, which has a simple structure and is convenient for manufacturing the cover. The limiting column extends to the contact plate and is clamped with the clamping part on the contact plate, which has the advantages of simple connection and convenient connection operation.

[0010] In an optional embodiment, the clamping portion is a first clamping groove, and the limiting column can be clamped in the first clamping groove. Alternatively, the clamping portion is a clamping hole, and the limiting column can be clamped in the clamping hole. Alternatively, the clamping portion is a convex ridge, and the end of the limiting column is provided with a second clamping groove adapted to the convex ridge.

[0011] Based on the above-mentioned embodiments of the present application, no matter whether the snap-in portion is set as a snap-in slot, a snap-in hole or a convex ridge, a second limiting position can be formed in cooperation with the limiting column to limit the contact plate and prevent the contact plate from deflecting on the connecting portion. The structure of the above-mentioned cooperation form is relatively simple, which is convenient for connecting operations.

[0012] In an optional embodiment, the limiting column includes a main body and a clamping column, the first end of the main body is connected to the cover body, the second end of the main body extends toward a side away from the cover body, and the clamping column is arranged at the second end of the main body. The cross-sectional size of the clamping column is smaller than the end face size of the main body, and the clamping column clamps and presses the clamping portion.

[0013] Based on the above-mentioned embodiments of the present application, the limiting column consists of a main body and a clamping column. The main body can be used to improve the structural stability of the limiting column, and the clamping column is used to connect the clamping part. This can reduce the risk of the limiting column breaking due to excessive deflection force on the contact plate, thereby improving the reliability of the second limiting position.

[0014] In an optional embodiment, the contact plate includes a wiring section, a connecting section and a stationary contact section, wherein the wiring section and the stationary contact section are located at opposite ends of the connecting section. A fastening hole adapted to the fastener is provided on the connecting portion, a through hole is provided on the connecting section, the fastener is simultaneously passed through the through hole and the fastening hole, and the connecting section is fixedly connected to the connecting portion through the fastener.

[0015] Based on the above embodiments of the present application, the connecting section not only connects the terminal and the static contact section as one, but also connects to the connecting portion on the housing to achieve the positioning and installation of the contact plate. The through hole opened on the connecting section is connected to the fastening hole, which is convenient for connection through fasteners, and the matching form is relatively simple, which is convenient for processing and forming.

[0016] In an optional embodiment, the second limiting structure is close to the stationary contact segment relative to the through hole.

[0017] Based on the above-mentioned embodiments of the present application, the second limiting structure is arranged at a position of the connecting section close to the static contact section, which can limit the static contact section, effectively reduce the risk of the static contact section being bent and deformed by the electric arc generated on the static contact section, improve the structural stability of the static contact section and the contact plate, increase the service life of the contact plate, and reduce the risk of electrical accidents.

[0018] In an optional embodiment, at least one limiting boss is further provided on the housing, and the side edge of the stationary contact segment can abut against the limiting boss.

[0019] Based on the above-mentioned embodiments of the present application, the limiting boss arranged on the side of the static contact segment abuts against the side of the static contact segment, which can play a role in limiting the static contact segment. The rotation or displacement of the static contact segment is limited, and the corresponding rotation and displacement of the entire conductive plate are limited, thereby preventing the conductive plate from deflecting during the installation process.

[0020] In an optional embodiment, two limiting bosses are provided, and the two limiting bosses are arranged oppositely on two sides of the stationary contact segment.

[0021] Based on the above embodiments of the present application, by providing a limiting boss on each side of the stationary contact segment, and the two limiting bosses are positioned opposite to each other, the stationary contact segment can be clamped between the two limiting bosses, effectively preventing the stationary contact segment from deflecting to both sides.

[0022] In an optional embodiment, the fastening hole is configured as a threaded hole, the fastener is configured as a screw, and the screw passes through the through hole and is threadedly connected to the threaded hole.

[0023] Based on the above embodiments of the present application, the connection form using screws and threaded holes has a high connection stability, can reduce the risk of the contact plate being loose or falling out, and is easy to assemble. At the same time, in conjunction with the second limiting position and the limiting boss, it can effectively prevent the contact plate from being rotated, thereby improving the assembly stability of the contact plate.

[0024] In a second aspect, an embodiment of the present application further provides a switching device, comprising an arc extinguishing member and the above-mentioned contact plate, wherein the arc extinguishing member is arranged on a housing of the contact plate.

[0025] Based on the above-mentioned embodiments of the present application, the switching device with the above-mentioned contact plate can limit the contact plate from at least two positions, and the limiting effects of at least two positions cooperate with each other to lock the contact plate in the connecting part inside the shell, effectively preventing the contact plate from shaking or rotating inside the shell, improving the installation stability of the contact plate, and thus helping to enhance the use stability of the switching device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the structure of the shell and cover after assembly provided in an embodiment of the present application.

[0028] Figure 2 A top view of the assembled shell and cover provided in an embodiment of the present application.

[0029] Figure 3 Provided for the embodiments of this application Figure 2 Cross-sectional view along the AA direction.

[0030] Figure 4 An exploded view of a switch device provided in an embodiment of the present application.

[0031] Figure 5 A schematic diagram of the structure of the cover body provided in an embodiment of the present application.

[0032] Figure 6 A schematic diagram of the structure of a contact plate provided in an embodiment of the present application.

[0033] Figure 7 A schematic diagram of the structure in which a contact plate provided in an embodiment of the present application is installed in a housing.

[0034] Figure 8 Provided for the embodiments of this application Figure 7 Cross-sectional view along the BB direction.

[0035] Description of reference numerals:

[0036] 1. Shell; 11. Connecting part; 12. Fastener; 13. Fastening hole; 14. Limiting boss; 2. Contact plate; 21. Wiring section; 22. Connecting section; 23. Static contact section; 221. First slot; 222. Through hole; 3. Cover; 31. Limiting column; 311. Main body; 312. Snap-on column; 4. Arc extinguishing member. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0039] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0040] In the description of this application, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0041] In the description of this application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] As an important component of the contactor, the contact plate can cooperate with the terminal to connect the wire and introduce the current in the wire, and can also cooperate with the moving contact to realize the conduction and disconnection of the circuit. The existing contact plate is usually fastened to the housing of the contactor with screws to reduce the risk of the contact plate loosening or falling off.

[0043] However, the contact plate is prone to rotation when only screws are used for fastening. For example, when tightening the screws, the contact plate may rotate in the tightening direction driven by the screws, or when the contact plate is connected to the wiring terminal, the contact plate may rotate in the tightening direction driven by the wire pressing screws. Both of these situations will reduce the installation stability of the contact plate and affect the normal use of the contact plate.

[0044] Based on this, the embodiments of the present application provide a contact plate and a switch device, which can improve the installation stability of the contact plate and reduce the impact of unstable installation of the contact plate on the normal use of the switch device.

[0045] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0046] Please refer to Figures 1 to 3 The present embodiment provides a contact plate 2, which is arranged on a switch device. The switch device includes a shell 1 and a cover body 3. A connecting portion 11 is arranged on the shell 1, and the contact plate 2 is installed on the connecting portion 11. The cover body 3 is covered on the shell 1. The contact plate 2 is connected to the connecting portion 11 by a fastener 12 and forms a first limiting position. The contact plate 2 can rotate relative to the first limiting position. A first limiting structure is arranged on the cover body 3, and a second limiting structure adapted to the first limiting structure is arranged on the contact plate 2. After the cover body 3 is connected to the shell 1, the first limiting structure is connected to the second limiting structure and forms a second limiting position. There is a gap between the first limiting position and the second limiting position, and when the first limiting position and the second limiting position act at the same time, the contact plate 2 is relatively locked with the connecting portion 11.

[0047] Reference Figure 3 The contact plate 2 is mounted on the connection part 11 in the housing 1 through the fastener 12, wherein the fastener 12 may be a screw or a rivet or other similar parts, and the connection part 11 may include a corresponding structure such as a threaded hole or a riveting hole. The first limiting position formed by the fastener 12 and the connection part 11 can play a corresponding fixing and limiting role on the contact plate 2, and has a simple structure and convenient installation and operation.

[0048] The cover body 3 is covered on the housing 1 and forms a second limiting position on the contact plate 2 , and the second limiting position includes a first limiting structure on the cover body 3 and a second limiting structure on the contact plate 2 .

[0049] The first limiting structure may be configured as a limiting groove or a limiting platform, and the second limiting structure may be configured as a limiting platform or a limiting groove, etc., correspondingly.

[0050] When the cover body 3 is connected to the shell 1, the first limiting structure on the cover body 3 is close to the second limiting structure on the contact plate 2. After the cover body 3 is installed to the shell 1, the first limiting structure and the second limiting structure are connected to form a second limiting position.

[0051] The first limiting position and the second limiting position are arranged at intervals, and the contact plate 2 can be locked by the two limiting positions, thereby preventing the contact plate 2 from deflecting or rotating. Figure 3 shown.

[0052] Based on the above-mentioned embodiments of the present application, with the cooperation of the first limiting position and the second limiting position, the contact plate 2 can be limited from two points, thereby locking the contact plate 2 on the connecting portion 11 of the shell 1, effectively reducing the risk of the contact plate 2 being offset or rotated after being installed on the shell 1, and improving the installation stability of the contact plate 2.

[0053] Moreover, the second limiting position is formed after the cover body 3 and the shell 1 are connected, which means that no other fixing operation is required. The second limiting position can be directly formed during the assembly of the cover body 3 and the shell 1 to limit the contact plate 2. The operation is simple and the limiting effect is relatively stable.

[0054] Of course, the contact plate 2 may also form a third limiting position or more limiting positions between the housing 1 and the cover 3 , which can further improve the installation stability of the contact plate 2 .

[0055] Reference Figure 3 and Figure 4 In some examples, the first limiting structure is a limiting column 31 disposed on the inner side of the cover body 3, the limiting column 31 extends toward the contact plate 2, and the second limiting structure is a clamping portion disposed on the contact plate 2, and the limiting column 31 can be connected to the clamping portion.

[0056] Based on the above-mentioned embodiment of the present application, the first limiting structure is set as a limiting column 31, and the limiting column 31 has a simple structure, which is convenient for manufacturing and forming the cover body 3. The limiting column 31 extends to the contact plate 2 and is clamped with the clamping part on the contact plate 2, which has the advantages of simple connection form and convenient connection operation.

[0057] Reference Figure 4 , wherein the limiting column 31 is arranged on the side of the cover body 3 facing the housing 1. After the cover body 3 is covered on the housing 1, the limiting column 31 can extend into the housing 1 and connect to the clamping part or directly press against the surface of the contact plate 2. The clamping part can be arranged in the form of a clamping groove or a clamping hole, etc., and the limiting column 31 can be connected with the limiting column 31 to limit the deviation of the contact plate 2.

[0058] Reference Figure 4 For example, the clamping portion is a first clamping groove 221, and the limiting column 31 can be clamped in the first clamping groove 221. Or the clamping portion is a clamping hole, and the limiting column 31 can be clamped in the clamping hole. Or the clamping portion is a convex ridge, and the end of the limiting column 31 is provided with a second clamping groove adapted to the convex ridge.

[0059] Based on the above-mentioned embodiments of the present application, no matter whether the snap-in portion is set as a snap-in groove, a snap-in hole or a convex ridge, a second limiting position can be formed in cooperation with the limiting column 31 to limit the contact plate 2 and prevent the contact plate 2 from deflecting on the connecting portion 11. The structure of the above-mentioned cooperation form is relatively simple, which is convenient for connection operation.

[0060] Specifically, in the embodiments of the present application, refer to Figure 3 and Figure 4 The clamping portion is configured as a first clamping groove 221, which is configured on the side of the contact plate 2 facing the cover body 3, and the shape of the first clamping groove 221 is the same as the cross-sectional shape of the limiting column 31, that is, the first clamping groove 221 is configured as a circular groove, and the limiting column 31 is a cylinder.

[0061] After the cover body 3 is covered on the shell 1, the limiting column 31 can be inserted into the first slot 221, the side wall of the limiting column 31 can abut the side wall of the first slot 221, and the end face of the limiting column 31 can abut the bottom face of the first slot 221, so that the contact plate 2 can be pressed tightly in the shell 1 to prevent the contact plate 2 from deflecting.

[0062] Similarly, when the clamping portion is set as a clamping hole, the size of the clamping hole is the same as the size of the limiting column 31, and the limiting column 31 can be inserted into the clamping hole to abut against the side wall of the clamping hole to limit the deflection of the contact plate 2.

[0063] When the clamping portion is configured as a ridge, the ridge may protrude from the contact plate 2 and extend toward the cover 3 . The second clamping groove configured on the ridge may be the same as the first clamping groove 221 and have the same technical effect, which will not be described in detail.

[0064] Reference Figure 5 In some examples, the limiting column 31 includes a main body 311 and a clamping column 312. The first end of the main body 311 is connected to the cover 3, the second end of the main body 311 extends toward a side away from the cover 3, and the clamping column 312 is arranged at the second end of the main body 311. The cross-sectional size of the clamping column 312 is smaller than the end face size of the main body 311, and the clamping column 312 clamps and presses the clamping portion.

[0065] Based on the above-mentioned embodiments of the present application, the limiting column 31 is composed of a main body 311 and a clamping column 312. The main body 311 can be used to improve the structural stability of the limiting column 31, and the clamping column 312 is used to connect the clamping part. This can reduce the risk of the limiting column 31 breaking due to excessive deflection force on the contact plate 2, thereby improving the reliability of the second limiting position.

[0066] Specifically, refer to Figure 5 The limiting column 31 can be integrally formed with the cover body 3, or can be separately connected.

[0067] In the embodiment of the present application, the limiting column 31 is integrally formed with the cover body 3, the main body 311 is located between the cover body 3 and the clamping column 312, and the cross-sectional size of the main body 311 is larger than that of the clamping column 312, which can support and improve the strength of the clamping column 312. The clamping column 312 is connected to the clamping portion to form a second limiting position between the cover body 3 and the contact plate 2, and a relatively simple structure can be used to stably install the contact plate 2 in the housing 1, which is highly practical.

[0068] Reference Figure 6 In some examples, the contact plate 2 includes a wiring segment 21, a connecting segment 22 and a stationary contact segment 23, and the wiring segment 21 and the stationary contact segment 23 are located at opposite ends of the connecting segment 22. A fastening hole 13 adapted to the fastener 12 is provided on the connecting portion 11, and a through hole 222 is provided on the connecting segment 22. The fastener 12 is simultaneously penetrated through the through hole 222 and the fastening hole 13, and the connecting segment 22 is fixedly connected to the connecting portion 11 through the fastener 12.

[0069] Reference Figure 6 The wiring segment 21 is used to cooperate with the wiring terminal to connect the wire to the current in the wire. The static contact segment 23 is used to cooperate with the moving contact to realize the on and off of the control circuit through the action of the moving contact. The connecting segment 22 is used to cooperate with the connecting portion 11 on the housing 1 to fix the contact plate 2 on the housing 1.

[0070] Reference Figure 7 and Figure 8 The wiring segment 21 and the static contact segment 23 are located at opposite ends of the connecting segment 22, and the first limiting position and the second limiting position are both located on the connecting segment 22. The connecting segment 22 is connected to the connecting portion 11 through a fastener 12. The connecting portion 11 is generally provided with a fastening hole 13 to cooperate with the fastener 12. The through hole 222 provided on the connecting segment 22 is also used to cooperate with the fastener 12. The fastener 12 passes through the through hole 222 on the connecting segment 22 and is connected to the fastening hole 13 to fix the connecting segment 22 on the connecting portion 11.

[0071] Based on the above-mentioned embodiments of the present application, the connecting section 22 not only connects the terminal and the stationary contact section 23 as a whole, but is also connected to the connecting portion 11 on the housing 1 to achieve the positioning and installation of the contact plate 2. The through hole 222 provided on the connecting section 22 is connected to the fastening hole 13 to facilitate the connection through the fastener 12, and the matching form is relatively simple, which is convenient for processing and molding.

[0072] Reference Figure 6 and Figure 7 In some examples, the second limiting structure is close to the stationary contact segment 23 relative to the through hole 222 .

[0073] Based on the above-mentioned embodiments of the present application, the second limiting structure is arranged at a position of the connecting section 22 close to the static contact section 23, which can limit the static contact section 23, effectively reduce the risk of the static contact section 23 being bent and deformed by the arc generated on the static contact section 23, improve the structural stability of the static contact section 23 and the contact plate 2, increase the service life of the contact plate 2, and reduce the risk of electrical accidents.

[0074] Reference Figure 6 , wherein the second limiting structure is set as the first slot 221, and the first limiting structure is set as the limiting column 31, the limiting column 31 extends into the first slot 221 and abuts against the bottom of the first slot 221, thereby applying pressure to the first slot 221 to press the connecting section 22 onto the connecting portion 11. Since the first slot 221 is close to the static contact section 23, it can press the static contact section 23 to reduce the possibility of bending and deformation of the static contact section 23.

[0075] Reference Figure 7 and Figure 8 In some examples, at least one limiting boss 14 is further provided on the housing 1 , and the side edge of the stationary contact segment 23 can abut against the limiting boss 14 .

[0076] Based on the above-mentioned embodiments of the present application, the limiting boss 14 arranged on the side of the static contact segment 23 abuts against the side of the static contact segment 23, which can limit the static contact segment 23, and the rotation or displacement of the static contact segment 23 is limited, and the corresponding rotation and displacement of the entire conductive plate are limited, thereby preventing the conductive plate from deflecting during the installation process.

[0077] Specifically, the limiting boss 14 is arranged on the housing 1, and is located on the same plane as the conductive plate in the housing 1. The limiting boss 14 is a cylinder protruding from the plane, and the side of the static contact section 23 abuts against the side wall of the cylinder. The limiting boss 14 abuts against the static contact section 23, and can limit the static contact section 23 from deflecting in the direction of the limiting boss 14 from the side of the static contact section 23. Since the conductive plate is arranged as an integral unit, the conductive plate as a whole can be limited from deflecting in the direction of the limiting boss 14. In this way, the possibility of the conductive plate as a whole deflecting is effectively reduced during both the installation process and the wiring process, which is conducive to improving the installation stability.

[0078] The limiting boss 14 may also be configured in other shapes, such as a prism or plate-like structure, which can abut against the stationary contact section 23 and limit the stationary contact section 23 .

[0079] In addition, multiple limiting bosses 14 can also be provided, and multiple limiting bosses 14 are arranged at intervals in the shell 1 near the side of the static contact segment 23. Multiple limiting bosses 14 can limit the static contact segment 23 at multiple points. For example, the static contact segment 23 can be clamped between two limiting bosses 14, or it can be limited by multiple limiting bosses 14 located on the same side, both of which can effectively limit the installation of the conductive plate and prevent the conductive plate from deflecting.

[0080] For example, refer to Figure 7 There are two limiting bosses 14 , and the two limiting bosses 14 are arranged oppositely on both sides of the stationary contact section 23 .

[0081] Based on the above-mentioned embodiments of the present application, by providing a limiting boss 14 on each side of the stationary contact segment 23, and the two limiting bosses 14 are positioned opposite to each other, the stationary contact segment 23 can be clamped between the two limiting bosses 14, effectively preventing the stationary contact segment 23 from deflecting to both sides.

[0082] In some examples, the fastening hole 13 is configured as a threaded hole, and the fastener 12 is configured as a screw, which passes through the through hole 222 and is threadedly connected to the threaded hole.

[0083] Based on the above-mentioned embodiments of the present application, the connection form using screws and threaded holes has a high connection stability, can reduce the risk of loosening or falling out of the contact plate 2, and is easy to assemble. At the same time, in cooperation with the second limiting position and the limiting boss 14, it can effectively prevent the contact plate 2 from being rotated, thereby improving the assembly stability of the contact plate 2.

[0084] In an optional embodiment, the fastening hole 13 can be set as a rivet hole, and the fastener 12 can be set as a rivet. The riveted connection is simpler and the assembly operation is more convenient. There is no need to rotate the connection like a screw, which can avoid driving the contact plate 2 to rotate, which is beneficial to reducing the risk of rotation or loosening of the contact plate 2 and is beneficial to improving the connection stability.

[0085] Reference Figure 4 An embodiment of the present application further provides a switching device, including an arc extinguishing member 4 and the above-mentioned contact plate 2 , wherein the arc extinguishing member 4 is arranged on the housing 1 of the contact plate 2 .

[0086] Based on the above-mentioned embodiments of the present application, the switching device having the above-mentioned contact plate 2 can limit the contact plate 2 from at least two positions, and the limiting effects of at least two positions cooperate with each other to lock the contact plate 2 on the connecting portion 11 in the shell 1, effectively preventing the contact plate 2 from shaking or rotating in the shell 1, improving the installation stability of the contact plate 2, and thus helping to enhance the use stability of the switching device.

[0087] The arc extinguishing member 4 can be used to extinguish the arc generated on the stationary contact segment 23. The arc extinguishing member 4 is arranged in the housing 1 near the stationary contact segment 23 of the contact plate 2, and is specifically arranged above the stationary contact segment 23 at intervals.

[0088] In this embodiment, the arc extinguishing member 4 is configured to be U-shaped, the U-shaped arc extinguishing member 4 is horizontally installed with its opening facing the static contact section 23, and the side wall of the U-shaped arc extinguishing member 4 abuts against the side of the limiting boss 14 away from the static contact section 23. This can prevent the force generated by the arc from causing the side wall of the arc extinguishing member 4 to bend, thereby improving the structural stability of the arc extinguishing member 4 and ensuring reliable arc extinguishing.

[0089] In addition, the distance between the arc extinguishing member 4 and the stationary contact segment 23 is set relatively small, which can play a limiting role when the stationary contact segment 23 is warped and deformed, and cooperate with the limiting column 31 to further reduce the possibility of warping and deformation of the stationary contact segment 23.

[0090] The above-mentioned switch device of the present application may also be replaced by other types of switch devices, such as switch devices with contact plates 2, such as circuit breakers, fuses, relays, etc.

[0091] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A contact plate, characterized in that: The switch device includes a housing and a cover, the housing is provided with a connection portion, the contact plate is mounted on the connection portion, and the cover is covered on the housing; The contact plate is connected to the connecting portion by a fastener and forms a first limiting position, and the contact plate can rotate relative to the first limiting position; The cover body is provided with a first limiting structure, and the contact plate is provided with a second limiting structure adapted to the first limiting structure. After the cover body is connected to the housing, the first limiting structure is connected to the second limiting structure to form a second limiting position; The first limiting position and the second limiting position are spaced apart from each other, and when the first limiting position and the second limiting position act simultaneously, the contact plate and the connecting portion are relatively locked.

2. The contact plate according to claim 1, characterized in that The first limiting structure is a limiting column arranged inside the cover body, and the limiting column extends toward the contact plate. The second limiting structure is a clamping portion arranged on the contact plate, and the limiting column can be connected to the clamping portion.

3. The contact plate according to claim 2, characterized in that The clamping portion is a first clamping slot, and the limiting column can be clamped in the first clamping slot; Alternatively, the clamping portion is a clamping hole, and the limiting column can be clamped in the clamping hole; Alternatively, the engaging portion is a convex ridge, and the end of the limiting column is provided with a second engaging groove matched with the convex ridge.

4. The contact plate according to claim 2, characterized in that The limiting column comprises a main body and a clamping column, wherein a first end of the main body is connected to the cover body, a second end of the main body extends toward a side away from the cover body, and the clamping column is arranged at the second end of the main body; The cross-sectional dimension of the clamping column is smaller than the end surface dimension of the main body, and the clamping column clamps and presses the clamping part.

5. The contact plate according to claim 1, characterized in that The contact plate comprises a wiring segment, a connecting segment and a stationary contact segment, wherein the wiring segment and the stationary contact segment are located at two opposite ends of the connecting segment; The connecting portion is provided with a fastening hole matched with the fastener, the connecting section is provided with a through hole, the fastener is simultaneously passed through the through hole and the fastening hole, and the connecting section is fixedly connected to the connecting portion through the fastener.

6. The contact plate according to claim 5, characterized in that The second limiting structure is close to the static contact segment relative to the through hole.

7. The contact plate according to claim 5, characterized in that At least one limiting boss is also provided on the housing, and the side edge of the stationary contact section can abut against the limiting boss.

8. The contact plate according to claim 7, characterized in that There are two limit bosses, which are arranged opposite to each other on both sides of the stationary contact section.

9. The contact plate according to claim 5, characterized in that The fastening hole is configured as a threaded hole, and the fastener is configured as a screw. The screw passes through the through hole and is threadedly connected to the threaded hole.

10. A switching device, characterized in that: It comprises an arc extinguishing member and a contact plate as claimed in any one of claims 1 to 9, wherein the arc extinguishing member is arranged on the shell of the contact plate.

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