Circuit breaker
By forming the buttons in one piece on the circuit breaker housing and extruding the contacts with the elastic action of the buttons, the problems of complex structure and high cost of the existing circuit breaker test buttons are solved, and parts reduction, assembly simplification and cost reduction are achieved. effect.
Patent Information
- Application Number
- CN202420546563.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-20
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-03-20
AI Technical Summary
The test button structure of existing circuit breakers requires multiple parts, resulting in complex assembly processes and high cost.
The button is integrally formed on the housing, and the first contact member is squeezed through the elastic action of the button to make it in contact with the second contact member, so as to realize the conduction and disconnection of the test circuit.
Reduces the number of parts, simplifies the assembly process, and reduces assembly costs and difficulty.
Smart Images
Figure CN222462777U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to a circuit breaker. Background Art
[0002] A residual current operated circuit breaker, also known as a leakage circuit breaker or leakage protector, is an important electrical safety device. Its main function is to detect the residual current in the circuit. When the current exceeds the preset threshold, the circuit breaker will quickly cut off the circuit to prevent the current from passing through the human body or other conductive objects and causing electric shock injuries.
[0003] The residual current operated circuit breaker is equipped with a test button, which can test whether the circuit breaker can operate normally when an abnormal current is detected. By pressing the test button, a leakage or ground fault can be simulated to check whether the circuit breaker can quickly cut off the circuit to prevent the current from passing through the human body or other conductive objects and causing harm. The test button is integrated on the panel of the circuit breaker. Under normal circumstances, the test button can be easily pressed and automatically reset by the reset spring to ensure that the circuit breaker quickly operates and cuts off the circuit. If the circuit breaker does not operate after the test button is pressed, or the button cannot be reset, it may indicate that the circuit breaker is faulty and needs to be repaired or replaced.
[0004] At present, test buttons mostly use independent button parts in conjunction with reset springs. After the button parts are pressed, the test circuit is connected and automatically resets under the action of the reset spring. This test structure requires a large number of parts, a relatively increased number of assembly processes, and an increased assembly cost. Utility Model Content
[0005] The utility model aims to provide a circuit breaker, which can reduce the number of parts of a test structure, optimize the assembly process and reduce the assembly cost.
[0006] To achieve this purpose, the utility model adopts the following technical solutions:
[0007] A circuit breaker, including a housing, comprising:
[0008] A button is an integrated structure with the housing, and the button is elastic;
[0009] A first contact member is disposed in the housing;
[0010] A second contact member is disposed in the housing;
[0011] The button is used to press the first contact piece so that the first contact piece contacts the second contact piece and the test circuit is turned on, and the button can be reset by its own elasticity.
[0012] As an optional solution for a circuit breaker, the button is a cantilever structure with one end connected to the housing and the other end being in a free state.
[0013] As an optional solution of a circuit breaker, the button includes a main body and a protrusion arranged on the main body, the protrusion is arranged on a side of the main body close to the first contact piece, and the protrusion is used to press the first contact piece.
[0014] As an optional solution for a circuit breaker, the protrusion and the main body are an integrated structure.
[0015] As an optional solution for a circuit breaker, the portion where the protrusion contacts the first contact piece is an arc-shaped structure.
[0016] As an optional solution for a circuit breaker, the first contact piece includes a first fixed portion and a first contact portion connected to one end of the first fixed portion, the first fixed portion and the first contact portion are arranged at an angle, a first groove for limiting the first fixed portion and a second groove for limiting the first contact portion are provided in the shell, and the button is used to squeeze the first contact portion.
[0017] As an optional solution for a circuit breaker, the second contact piece includes a second fixed portion and a second contact portion connected to one end of the second fixed portion, the second fixed portion and the second contact portion are arranged at an angle, and a third groove for limiting the second fixed portion and a fourth groove for limiting the second contact portion are provided in the shell, and the first contact portion can contact the second contact portion.
[0018] As an optional solution of a circuit breaker, the first fixing portion and the first contact portion are an integrated structure.
[0019] As an optional solution for a circuit breaker, a connection between the first fixing portion and the first contact portion is transitioned through an arc surface.
[0020] As an optional solution for a circuit breaker, the second groove and the first contact portion are clearance-fitted.
[0021] Beneficial effects:
[0022] In the utility model, this embodiment forms a button for triggering the first contact piece on the housing in an integrated manner. At the same time, relying on the elasticity of the button itself, the user can directly press the button to cause the button to elastically deform and squeeze the first contact piece, the first contact piece deforms and contacts the second contact piece, and the test circuit is turned on. When the user removes the pressing force, the button returns to its original position by relying on its own elasticity, and the first contact piece recovers its elastic deformation and separates from the second contact piece, thereby disconnecting the test circuit. By directly forming the button in an integrated manner on the housing while ensuring the elasticity of the button itself, the number of parts can be effectively reduced, the assembly process can be reduced, and the difficulty and cost of assembly can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a schematic diagram of the internal structure of a circuit breaker provided by an embodiment of the utility model;
[0024] Figure 2 yes Figure 1 A local enlarged view at point A;
[0025] Figure 3 is a top view of a circuit breaker provided by an embodiment of the utility model;
[0026] Figure 4 is a schematic structural diagram of a first contact member provided in an embodiment of the utility model;
[0027] Figure 5 It is a schematic diagram of the internal structure of a circuit breaker with a first contact piece and a second contact piece hidden provided by an embodiment of the utility model;
[0028] Figure 6 yes Figure 5 A partial enlarged view at point B.
[0029] In the figure:
[0030] 1. housing; 11. first slot; 12. second slot; 13. third slot; 14. fourth slot;
[0031] 2. button; 21. main body; 22. raised part;
[0032] 3. first contact member; 31. first fixing portion; 32. first contact portion;
[0033] 4. Second contact member; 41. Second fixing portion; 42. Second contact portion. DETAILED DESCRIPTION
[0034] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.
[0035] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0036] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0037] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.
[0038] Please refer to the attached Figure 1 -Attached Figure 3 This embodiment relates to a circuit breaker, which includes a button 2 for detecting whether its own protection function is normal, and also includes a housing 1, a first contact 3 and a second contact 4. Specifically, the button 2 and the housing 1 are an integrated structure, and the button 2 has elasticity; the first contact 3 and the second contact 4 are both arranged inside the housing 1, and the button 2 is used to press the first contact 3 so that the first contact 3 and the second contact 4 are in contact and the test circuit is turned on, and the button 2 can be reset by its own elasticity.
[0039] In this embodiment, the first contact piece 3 and the second contact piece 4 are metal conductive pieces. One end of the first contact piece 3 can be elastically deformed and contact the second contact piece 4 under the action of external force, so that the test circuit is turned on, thereby simulating the residual current of the circuit breaker, so as to observe whether the circuit breaker is normally disconnected. If the circuit breaker can be normally disconnected, it means that the function of the circuit breaker is intact. When the circuit breaker cannot be normally disconnected, the circuit breaker may have a fault and needs timely inspection and maintenance. In this embodiment, the button 2 for triggering the first contact piece 3 is integrally formed on the shell 1, specifically, it can be directly formed on the same wall surface as the circuit breaker handle. At the same time, the button 2 itself is elastic, and the user can directly press the button 2 to make the button 2 elastically deform and squeeze the first contact piece 3. When the user removes the pressing force, the button 2 returns to its original position by its own elasticity, and the first contact piece 3 recovers its elastic deformation and separates from the second contact piece 4, thereby disconnecting the test circuit.
[0040] This embodiment forms the button 2 integrally on the housing 1 while ensuring the elasticity of the button 2 itself. Compared with the existing test button which uses an independent button part in combination with a return spring to perform functional tests, it can effectively reduce the number of parts, assembly steps, and assembly difficulty and cost.
[0041] Optionally, the button 2 is a cantilever structure with one end connected to the housing 1 and the other end being free.
[0042] In this embodiment, a through hole for accommodating the button 2 is provided on the top surface of the housing 1. The button 2 is a long plate-shaped member. One end of the button 2 is connected to the housing 1. The button 2 on the housing 1 can be molded together with the housing 1 by compression molding. The other end of the button 2 is a cantilever structure. By pressing the button 2, the button 2 can generate a large elastic deformation toward the inside of the housing 1 at the end connected to the housing 1. When the user cancels the squeezing of the button 2, the button 2 returns to its original position. The gap between the button 2 and the housing 1 is minimized as much as possible to reduce dust and external impurities from entering the circuit breaker through the gap.
[0043] Optionally, the button 2 includes a main body 21 and a protrusion 22 disposed on the main body 21 , wherein the protrusion 22 is disposed on a side of the main body 21 close to the first contact member 3 , and the protrusion 22 is used to press the first contact member 3 .
[0044] In this embodiment, the button 2 includes a plate-shaped main body 21, and a protrusion 22 is convexly provided on the inner wall surface of the main body 21. Because the button 2 needs to have sufficient elasticity, the thickness of the button 2 itself cannot be too large. Therefore, in order to ensure that the button 2 can reliably trigger the first contact member 3 and have sufficient elasticity to complete reset, the protrusion 22 is used as a direct extrusion structure of the first contact member 3.
[0045] Furthermore, the protrusion 22 and the main body 21 are an integrated structure.
[0046] In this embodiment, the protrusion 22 is directly formed on the main body 21 and is an integrated structure with the housing 1, which can reduce processing and assembly costs and improve economic efficiency. In addition, the integrated molding method is simple and has a certain strength.
[0047] Optionally, the portion where the protrusion 22 contacts the first contact member 3 is an arc-shaped structure.
[0048] In this embodiment, the protrusion 22 is a partial cylinder. The protrusion 22 squeezes the first contact piece 3 through the side wall of the cylindrical surface and directly acts on the first contact piece 3 through the arc structure, which can avoid damaging the first contact piece 3 and improve the service life of the circuit breaker. Since the first contact piece 3 is a conductive piece, it can prevent scratches on the first contact piece 3 to a certain extent and ensure the stability of the test circuit.
[0049] Please continue to refer to the attached Figure 4 -Attached Figure 6 Optionally, the first contact member 3 includes a first fixed portion 31 and a first contact portion 32 connected to one end of the first fixed portion 31, the first fixed portion 31 and the first contact portion 32 are arranged at an angle, and a first groove 11 for limiting the first fixed portion 31 and a second groove 12 for limiting the first contact portion 32 are provided in the shell 1, and the button 2 is used to squeeze the first contact portion 32.
[0050] In this embodiment, the first contact member 3 is an L-shaped plate-shaped metal member, which includes a first fixing portion 31 and a first contact portion 32, and the first fixing portion 31 and the first contact portion 32 are arranged at a right angle. The first contact member 3 can be directly obtained by integral bending processing of parts. One end of the first fixing portion 31 is used for welding other conductive parts of the test circuit, such as a wire, etc., and part of the structure of the first fixing portion 31 is placed in the first groove 11, and part of the structure of the first contact portion 32 is placed in the second groove 12. The first contact member 3 is limited by the first groove 11 and the second groove 12, and the first contact portion 32 can contact the second contact member 4 by deforming itself. At least the contact part of the first contact member 3 is elastic, that is, the first contact portion 32 is elastic, so that the first contact portion 32 and the button 2 can be reset at the same time when the button 2 cancels the pressing force. The first groove 11 and the second groove 12 need to adapt to the structure of the first contact member 3. In this embodiment, on the premise that the first contact portion 32 has sufficient deformation space and can reliably contact the second contact member 4, the first contact portion 32 and the second groove 12 are clearance-matched, and the first fixing portion 31 and the first groove 11 are clearance-matched.
[0051] Optionally, the connection between the first fixing portion 31 and the first contact portion 32 is transitioned through an arc surface.
[0052] Since the first contact member 3 undergoes elastic deformation under the action of the button 2, the stress of the first contact member 3 is concentrated at the connection between the first fixing portion 31 and the first contact portion 32. The arc surface transition can reduce the stress concentration of the first contact member 3, thereby increasing the service life of the first contact member 3.
[0053] Optionally, the second contact member 4 includes a second fixed portion 41 and a second contact portion 42 connected to one end of the second fixed portion 41, the second fixed portion 41 and the second contact portion 42 are arranged at an angle, and a third groove 13 for limiting the second fixed portion 41 and a fourth groove 14 for limiting the second contact portion 42 are provided in the shell 1, and the first contact portion 32 can contact the second contact portion 42.
[0054] In this embodiment, the second contact member 4 is also an L-shaped plate-like metal component. The second contact member 4 includes a second fixing portion 41 and a second contact portion 42. One end of the second fixing portion 41 is used for welding other conductive parts of the test circuit, such as a wire, etc. The second fixing portion 41 and the second contact portion 42 are arranged at a right angle. The second contact member 4 can be directly obtained by bending the parts. Part of the structure of the second fixing portion 41 is placed in the third groove 13, and part of the structure of the second contact portion 42 is placed in the fourth groove 14. The third groove 13 and the fourth groove 14 are used to limit the second contact member 4.
[0055] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.
Claims
1. A circuit breaker comprising a housing (1), characterized in that: include: A button (2) is an integrated structure with the housing (1), and the button (2) is elastic; A first contact member (3) is arranged in the housing (1); A second contact member (4) is disposed in the housing (1); The button (2) is used to press the first contact piece (3) so that the first contact piece (3) contacts the second contact piece (4) and the test circuit is turned on. The button (2) can be reset by its own elasticity.
2. The circuit breaker according to claim 1, characterized in that: The button (2) is a cantilever structure with one end connected to the housing (1) and the other end being in a free state.
3. The circuit breaker according to claim 1, characterized in that: The button (2) comprises a main body (21) and a protrusion (22) arranged on the main body (21); the protrusion (22) is arranged on a side of the main body (21) close to the first contact piece (3); and the protrusion (22) is used to press the first contact piece (3).
4. The circuit breaker according to claim 3, characterized in that: The protruding portion (22) and the main body (21) are an integrated structure.
5. The circuit breaker according to claim 3, characterized in that: The portion where the protrusion (22) contacts the first contact piece (3) is an arc-shaped structure.
6. The circuit breaker according to claim 1, characterized in that: The first contact member (3) comprises a first fixing portion (31) and a first contact portion (32) connected to one end of the first fixing portion (31); the first fixing portion (31) and the first contact portion (32) are arranged at an angle; a first groove (11) for limiting the first fixing portion (31) and a second groove (12) for limiting the first contact portion (32) are provided in the housing (1); and the button (2) is used to press the first contact portion (32).
7. The circuit breaker according to claim 6, characterized in that: The second contact member (4) comprises a second fixing portion (41) and a second contact portion (42) connected to one end of the second fixing portion (41); the second fixing portion (41) and the second contact portion (42) are arranged at an angle; a third groove (13) for limiting the second fixing portion (41) and a fourth groove (14) for limiting the second contact portion (42) are provided in the housing (1); and the first contact portion (32) can contact the second contact portion (42).
8. The circuit breaker according to claim 6, characterized in that: The first fixing portion (31) and the first contact portion (32) are an integrated structure.
9. The circuit breaker according to claim 6, characterized in that: The connection between the first fixing portion (31) and the first contact portion (32) is transitioned through an arc surface.
10. The circuit breaker according to any one of claims 6 to 9, characterized in that: The second groove (12) and the first contact portion (32) are clearance-fitted.