Shell assembly and residual current operated circuit breaker

Abstract

The utility model provides a shell assembly and a residual current operated circuit breaker, and belongs to the technical field of electrical equipment. The shell assembly comprises a base, a partition plate and a test button. A mounting hole is formed in the base and penetrates through the base in the first direction. The partition plate is connected with the base, and a mounting space is formed between the partition plate and the base. The test button comprises a pressing part and an abutting part which are connected with each other, one end, far away from the abutting part, of the pressing part penetrates through the mounting hole from the mounting space and is exposed out of the base, the abutting part is located in the mounting space, and one end, far away from the pressing part, of the abutting part is used for abutting against the contact piece. The abutting part can abut against the contact piece, so that the contact piece is electrically connected with the contact plate. The partition plate is provided with a guide limiting structure, the test button is provided with a matching structure, and the guide limiting structure is matched with the matching structure. According to the shell assembly designed by the invention, the use fluency of the test button can be improved, and the possibility of clamping stagnation of the test button in the pressing and resetting process is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of electrical equipment, and in particular to a housing assembly and a residual current operated circuit breaker. Background Art

[0002] Residual current operated circuit breakers are important switchgear in power institutions. Under specified conditions, when the residual current reaches the specified value, the residual current operated circuit breaker can quickly cut off the fault power supply in a very short time to protect the safety of people and electrical equipment.

[0003] The residual current operated circuit breaker is provided with a leakage test device, which includes a test button. The test button is usually partially exposed outside the housing of the residual current operated circuit breaker so that an operator can press it.

[0004] In the prior art, the test button may get stuck during the pressing and resetting process, which affects the leakage performance test of the residual current operated circuit breaker. Therefore, a housing assembly and a residual current operated circuit breaker are urgently needed. Utility Model Content

[0005] The present application provides a housing assembly and a residual current operated circuit breaker, which improve the smoothness of using a test button and reduce the occurrence of the problem of the test button getting stuck during the process of being pressed and reset.

[0006] In a first aspect, the present application provides a housing assembly, which is applied to a residual current operated circuit breaker. The residual current operated circuit breaker includes a contact piece and a contact plate. The contact plate is used to be electrically connected to the leakage test circuit of the residual current operated circuit breaker. The housing assembly includes: a base, a partition and a test button. The base is provided with a mounting hole, and the mounting hole passes through the base along a first direction. The partition is connected to the base, and an installation space is formed between the partition and the base. The test button includes a pressing portion and an abutting portion connected to each other. One end of the pressing portion away from the abutting portion passes through the mounting hole from the installation space and is exposed to the base. The abutting portion is located in the installation space, and one end of the abutting portion away from the pressing portion is used to abut against the contact piece. The abutting portion can press the contact piece so that the contact piece is electrically connected to the contact plate. The partition is provided with a guide limit structure, and the test button is provided with a matching structure, and the guide limit structure matches the matching structure.

[0007] Through the above scheme, the present application sets a mounting hole that passes through the base on the base, so that the mounting hole is only set on the base as a structural member, rather than being formed by splicing holes on two structural members such as the base and the cover plate, thereby reducing the possibility of misalignment of the mounting hole. Thereby reducing the possibility of the test button getting stuck when the pressing portion of the test button moves along the mounting hole. A guide limit structure is set on the partition, and a matching structure that matches the guide limit structure is set on the test button. When the test button is pressed or reset, the guide limit structure can guide and limit the matching structure, thereby further reducing the possibility of the test button getting stuck when the test button is pressed and reset.

[0008] In a possible design, the test button further includes a guide slider, which is connected to the pressing portion and located in the installation space, and the matching structure is configured as a guide slider. A first guide slot is provided at a position where the partition plate is opposite to the guide slider, and the guide limit structure is configured as the first guide slot. The guide slider is partially located in the first guide slot, and when the test button moves in the first direction, the guide slider slides along the first guide slot.

[0009] Through the above scheme, a guide slider is provided on the test button, and the guide slider is connected to the pressing part, and the movement of the pressing part can be used to drive the guide slider to move. A first guide slot is provided at a position relative to the partition and the guide slider, and on the basis of the effects of the partition mentioned in the above text, the partition can also play a guiding role, so that the partition can achieve a reuse effect. The first guide slot is configured as a guide limiting structure, and the guide slider is configured as a matching structure. The guide slider is matched with the first guide slot, so that the first guide slot can not only guide the test button in the first direction, but also limit the guide slider in directions other than the first direction, thereby increasing the stability of the movement of the test button.

[0010] In a possible design, the first guide slide groove includes a first groove bottom. When the test button drives the contact piece to move along the first direction until the contact piece abuts against the contact plate, the guide slide block abuts against the first groove bottom.

[0011] Through the above scheme, the present application uses the first guide groove to limit the test button. When the test button drives the contact piece to move along the first direction until the contact piece abuts the contact plate, the guide slider abuts against the bottom of the first groove, so that the test button cannot continue to move along the first direction, thereby increasing the reliability of the test button. In addition, the partition can not only guide the test button, but also limit the test button, so that the partition can achieve the effect of reuse.

[0012] In a possible design, the abutting portion includes an extension arm and a pressure block. One end of the extension arm is connected to the pressing portion, and the other end of the extension arm is connected to the pressure block, and the pressure block is used to abut against the contact piece.

[0013] Through the above scheme, the test button and the contact piece are in opposite or opposite positions. Based on the situation that the test button and the contact piece are not in opposite positions, the present application sets an extension arm so that the test button can effectively contact the contact piece, and sets a pressure block on the extension arm to increase the reliability of the contact between the test button and the contact piece. In addition, the setting of the extension arm does not necessarily require the test button to be set directly opposite to the contact piece. According to the setting position of the test button, the appropriate extension arm length can be selected to make the pressure block and the contact piece relative to each other, which increases the flexibility of the test button setting.

[0014] In a possible design, the partition is provided with a first limiting groove, and the guide limiting structure is configured as the first limiting groove. The matching structure is configured as an extension arm. In the first direction, the projection of the extension arm at least partially falls into the first limiting groove, and when the test button moves along the first direction, the extension arm slides along the first limiting groove.

[0015] Through the above scheme, a first limiting groove is set on the partition, the first limiting groove is configured as a guiding limiting structure, and the extension arm is configured as a matching structure. When the test button is pressed, the first limiting groove can guide the extension arm in the first direction.

[0016] In a possible design, the first limiting groove includes a second groove bottom. When the test button moves along the first direction until the abutting portion abuts against the contact piece, the extension arm abuts against the second groove bottom.

[0017] Through the above scheme, the present application uses the first limiting groove to limit the test button. When the test button drives the contact piece to move along the first direction until the contact piece abuts the contact plate, the extension arm abuts against the bottom of the second groove, thereby preventing the test button from continuing to move along the first direction, thereby increasing the reliability of the test button.

[0018] In a possible design, at least one side of the guide slider abuts against the inner wall of the base.

[0019] Through the above scheme, at least one side of the guide slider is abutted against the inner wall of the base, and the inner wall of the base can be used to guide and limit the guide slider. When the test button moves along the first direction, the guide slider is always abutted against the inner wall of the base. In this way, the possibility of the test button shaking in directions other than the first direction is reduced, and the stability of the test button is increased.

[0020] In a possible design, a second guide slot is provided at a position where the base and the guide slider are opposite. The portion of the guide slider close to the base is located in the second guide slot, and when the test button moves in the first direction, the guide slider also slides along the second guide slot.

[0021] Through the above scheme, a second guide groove is set on the base, and the part of the guide slider close to the base is located in the second guide groove. When the test button moves along the first direction, the second guide groove can be used to guide the guide slider. Since part of the guide slider is located in the second guide groove, the second guide groove can also play a certain limiting role on the guide slider.

[0022] In a possible design, the housing assembly further includes a cover plate, and a third guide slot is provided at a position of the cover plate opposite to the guide slider. A portion of the guide slider close to the cover plate is located in the third guide slot, and when the test button moves in the first direction, the guide slider also slides along the third guide slot.

[0023] Through the above scheme, the guide slider is guided by the third guide groove arranged on the cover plate, and the operation stability of the test button can be further improved when the test button moves along the first direction. In addition, the setting of the third guide groove can also limit the guide slider in directions other than the first direction, thereby reducing the possibility of shaking of the test button when moving along the first direction and increasing the operation stability of the test button.

[0024] In a second aspect, the present application provides a residual current operated circuit breaker, comprising a contact piece, a contact plate and the housing assembly of the first aspect. The contact piece and the contact plate are located in the installation space of the housing assembly.

[0025] Through the above scheme, the housing assembly provided in the present application can reduce the occurrence of the problem of the test button getting stuck during the pressing and resetting process due to the misalignment of the splicing hole when the installation hole is a splicing hole. In addition, a guide limit structure is provided on the partition of the housing assembly, and a matching structure that matches the guide limit structure is provided on the test button. When the test button is pressed or reset, the guide limit structure can guide and limit the matching structure, thereby further reducing the occurrence of the problem of the test button getting stuck during the pressing and resetting process.

[0026] The beneficial effects of the residual current operated circuit breaker provided in the second aspect can be referred to the beneficial effects brought about by the first aspect and the possible implementation methods of the first aspect, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 An exploded view of a portion of the structure of a residual current operated circuit breaker provided in an embodiment of the application.

[0028] Figure 2 A schematic diagram of a portion of the structure of a housing assembly provided in an embodiment of the present application at a certain viewing angle.

[0029] Figure 3 for Figure 2 Magnified view of section B.

[0030] Figure 4 A schematic diagram of the structure of the base provided in an embodiment of the present application.

[0031] Figure 5 A schematic diagram of the structure of a test button provided in an embodiment of the present application.

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

[0033] Figure 7 for Figure 6 Magnified view of section A.

[0034] Figure 8 for Figure 2 Schematic diagram of the structure after adding a partition to the structure shown.

[0035] Fig. 9 for Figure 8 Magnified view of section C.

[0036] Fig.10 A schematic diagram of the structure of the cover plate provided in an embodiment of the present application.

[0037] Description of reference numerals:

[0038] 100, base; 110, mounting hole;

[0039] 200, partition; 210, guide limiting structure; 220, first guide slide groove; 221, first groove bottom; 230, first limiting groove; 231, second groove bottom;

[0040] 300, test button; 310, pressing portion; 320, abutting portion; 321, extension arm; 322, pressure block; 330, matching structure; 340, guide slider;

[0041] 400, cover plate; 410, third guide chute;

[0042] 500, contact piece;

[0043] 600, contact plate;

[0044] 700, limit block;

[0045] OX, first direction. DETAILED DESCRIPTION

[0046] 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, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0048] The terms "comprising" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover but not exclude other contents. The word "a" or "an" does not exclude the presence of a plurality.

[0049] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiments" in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0050] The term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0051] The directional words appearing in the following description are all directions shown in the figures, and do not limit the static contact of a circuit breaker of the present application and the specific structure of the circuit breaker. For example, in the description of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply 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 on the present application.

[0052] In addition, the terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0053] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, the "connection" or "connection" of a mechanical structure may refer to a physical connection. For example, the physical connection may be a fixed connection, such as a fixed connection through a fixing member, such as a fixed connection through a screw, bolt or other fixing member; the physical connection may also be a detachable connection, such as a mutual snap connection or snap connection; the physical connection may also be an integral connection, such as welding, bonding or integral molding to form a connection for connection. The "connection" or "connection" of a circuit structure may refer to an electrical connection or a signal connection in addition to a physical connection. For example, it may be a direct connection, that is, a physical connection, or it may be an indirect connection through at least one intermediate element, as long as the circuit is connected, or it may be the internal connection of two elements; the signal connection may refer to a signal connection through a media medium, such as a radio wave, in addition to a signal connection through a circuit. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0054] 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.

[0055] Figure 1 An exploded view of a portion of the structure of a residual current operated circuit breaker provided in an embodiment of the application. Figure 2 A schematic diagram of a portion of the structure of a housing assembly provided in an embodiment of the present application at a certain viewing angle. Figure 3 for Figure 2Magnified view of section B. Figures 1 to 3 As shown, the present application provides a residual current operated circuit breaker, which comprises a contact piece 500, a contact plate 600 and a housing assembly. The contact piece 500 and the contact plate 600 are located in the installation space of the housing assembly.

[0056] A residual current operated circuit breaker is an electrical protection device that can detect the residual current in the circuit. When the residual current in the circuit exceeds the set value, the circuit breaker will automatically trip and cut off the circuit to prevent safety accidents caused by circuit overload or leakage. This type of circuit breaker is usually used in low-voltage power distribution systems and household electrical equipment, which can effectively protect people's lives and property.

[0057] The housing assembly includes a base 100 and a cover plate 400. The cover plate 400 and the base 100 are covered to form an installation space.

[0058] The residual current operated circuit breaker is usually provided with a leakage test circuit, which is arranged in the installation space formed by the cover plate 400 and the base 100 being covered. The leakage test circuit includes a contact piece 500, a contact plate 600, a mutual inductance coil, etc. One of the contact plates 600 is connected to the N pole of the residual current operated circuit breaker through a lead in series with a test resistor, and the other contact plate 600 is connected to the L pole of the residual current operated circuit breaker through a lead, and one of the leads passes through the mutual inductance coil, and the mutual inductance coil is connected to the circuit board of the residual current operated circuit breaker. The leakage test circuit is used to detect the working performance and sensitivity of the residual current operated circuit breaker by simulating leakage conditions.

[0059] The test circuit includes a test button 300, a contact piece 500 and a contact plate 600, etc. The contact plate 600 is electrically connected to the main circuit of the residual current operated circuit breaker through a wire. When the leakage test is not required, the contact piece 500 and the contact plate 600 are not in contact, and the test circuit cannot be turned on.

[0060] When a leakage test is required, the test button 300 is pressed, and the test button 300 presses against the contact piece 500, and the contact piece 500 abuts against the contact plate 600 to conduct the test circuit. When the residual current operated circuit breaker detects a short circuit, the residual current operated circuit breaker's leakage release drive mechanism is unlocked, the moving contact is separated from the static contact, the contact piece 500 is reset, and at the same time, the test button 300 is reset under the drive of the deformation reset force of the contact piece 500.

[0061] The housing assembly provided in the present application is explained in detail below with reference to the accompanying drawings.

[0062] Figure 4 A schematic diagram of the structure of the base provided in an embodiment of the present application. Figure 5A schematic diagram of the structure of a test button provided in an embodiment of the present application. Figure 6 A schematic diagram of the structure of the partition provided in an embodiment of the present application. Figure 7 for Figure 6 Magnified view of section A.

[0063] like Figure 1 as well as Figures 3 to 7 As shown, the present application provides a housing assembly, which includes: a base 100, a partition 200 and a test button 300. The base 100 is provided with a mounting hole 110, and the mounting hole 110 penetrates the base 100 along a first direction OX. The partition 200 is connected to the base 100, and an installation space is formed between the partition 200 and the base 100. The test button 300 includes a pressing portion 310 and an abutting portion 320 connected to each other, and one end of the pressing portion 310 away from the abutting portion 320 passes through the mounting hole 110 from the installation space and is exposed to the base 100, and the abutting portion 320 is located in the installation space, and one end of the abutting portion 320 away from the pressing portion 310 is used to abut against the contact piece 500. The abutting portion 320 can press the contact piece 500 so that the contact piece 500 is electrically connected to the contact plate 600. The partition plate 200 is provided with a guide and limit structure 210 , and the test button 300 is provided with a matching structure 330 , and the guide and limit structure 210 matches with the matching structure 330 .

[0064] The base 100 is provided with an internal space, and some components of the residual current operated circuit breaker are located in the internal space. The mounting hole 110 is a through hole provided along the first direction OX of the base 100, and the mounting hole 110 can be circular or square, etc. Among them, the first direction OX can be consistent with the direction of pressing the test button 300, and the first direction OX can also be consistent with the direction of resetting the test button 300. The first direction OX illustrated in the drawings of the present application is consistent with the direction of pressing the test button 300.

[0065] The partition 200 is arranged in the internal space of the base 100, and the partition 200 and the base 100 can be detachably connected. The partition 200 is used to divide the internal space of the base 100 into two parts. The installation space formed between the partition 200 and the base 100 is used to install the contact system and the leakage test circuit of the residual current operated circuit breaker, and the installation space formed between the partition 200 and the cover plate 400 is used to install the operating mechanism of the residual current operated circuit breaker.

[0066] The guide and limiting structure 210 may be a groove structure or a protrusion structure, etc., provided on the partition 200 .

[0067] The test button 300 is used to control the conduction or disconnection of the residual current operated circuit breaker leakage test circuit. The test button 300 includes a pressing portion 310 and an abutting portion 320 connected to each other, the pressing portion 310 is used for the operator to press the abutting portion 320 and the spring abuts against the spring.

[0068] The pressing portion 310 may be cylindrical or prismatic, etc. The shape of the pressing portion 310 may be the same as the shape of the mounting hole 110, or the shape of the pressing portion 310 may be different from the shape of the mounting hole 110. The diameter of the pressing portion 310 may be the same as the aperture of the mounting hole 110, or the diameter of the pressing portion 310 may be slightly smaller than the aperture of the mounting hole 110.

[0069] The abutting portion 320 may be cylindrical or prismatic, etc. The abutting portion 320 may be integrally formed with the pressing portion 310 , or the abutting portion 320 and the pressing portion 310 may be separately formed and then assembled.

[0070] The matching structure 330 may be a groove structure or a protrusion structure, etc., provided on the test button 300. The shape of the matching structure 330 needs to be compatible with the shape of the guide and limit structure 210, so that the guide and limit structure 210 can match the matching structure 330. For example, when the matching structure 330 is a groove structure, the guide and limit structure 210 may be a protrusion structure, or when the matching structure 330 is a protrusion structure, the guide and limit structure 210 may be a groove structure.

[0071] In summary, the present application sets a mounting hole 110 that penetrates the base 100 on the base 100, so that the mounting hole 110 is only set on the base 100, rather than being formed by splicing holes on two structural members such as the base 100 and the cover plate 400, thereby reducing the possibility of misalignment of the mounting hole 110. Thus, the possibility of the test button 300 getting stuck when the pressing portion 310 of the test button 300 moves along the mounting hole 110 is reduced. A guide limit structure 210 is set on the partition 200, and a matching structure 330 that matches the guide limit structure 210 is set on the test button 300. When the test button 300 is pressed or reset, the guide limit structure 210 can guide and limit the matching structure 330, thereby further reducing the possibility of the test button 300 getting stuck when the test button 300 is pressed and reset.

[0072] Please continue to refer to Figure 3 as well as Figures 5 to 7As shown, the test button 300 further includes a guide slider 340, which is connected to the pressing portion 310 and is located in the installation space, and the matching structure 330 is configured as the guide slider 340. A first guide slot 220 is provided at a position opposite to the partition 200 and the guide slider 340, and the guide limit structure 210 is configured as the first guide slot 220. The guide slider 340 is partially located in the first guide slot 220, and when the test button 300 moves along the first direction OX, the guide slider 340 slides along the first guide slot 220.

[0073] The guide slider 340 is a protruding structure provided on the pressing part 310. The guide slider 340 may be a block structure or a plate structure. The guide slider 340 may be integrally formed with the pressing part 310, or the guide slider 340 may be separately formed with the pressing part 310 and then assembled.

[0074] The first guide slot 220 is a groove structure provided on the partition 200. The shape of the first guide slot 220 can be selected according to the shape of the guide slider 340, so that the guide slider 340 can slide in the first guide slot 220. The first guide slot 220 can be integrally formed with the partition 200 when the partition 200 is formed, or the first guide slot 220 can be provided on the partition 200 by carving or cutting after the partition 200 is formed.

[0075] When the test button 300 is pressed or reset, the pressing portion 310 moves along the first direction OX in the mounting hole 110 . At the same time, the guide slider 340 moves along the first direction OX driven by the pressing portion 310 . During the movement of the guide slider 340 along the first direction OX, the guide slider 340 slides along the first guide groove 220 .

[0076] In summary, a guide slider 340 is provided on the test button 300, and the guide slider 340 is connected to the pressing portion 310, so that the movement of the pressing portion 310 can be used to drive the guide slider 340 to move. A first guide slot 220 is provided at a position where the partition 200 and the guide slider 340 are opposite, so that the partition 200 can also play a guiding role on the basis of the effects mentioned in the above text, so that the partition 200 can achieve a reuse effect. The first guide slot 220 is configured as a guide limiting structure 210, and the guide slider 340 is configured as a matching structure 330. The guide slider 340 is matched with the first guide slot 220, so that the first guide slot 220 can not only guide the test button 300 in the first direction OX, but also limit the guide slider 340 in other directions except the first direction OX, thereby increasing the stability of the movement of the test button 300.

[0077] Please continue to refer to Figure 7 As shown, the first guide slot 220 includes a first slot bottom 221 . When the test button 300 drives the contact piece 500 to move along the first direction OX until the contact piece 500 abuts against the contact plate 600 , the guide slider 340 abuts against the first slot bottom 221 .

[0078] The side of the first guide slot 220 facing the test button 300 is an open side, so that the guide slider 340 extends from the open side into the first guide slot 220. Based on this, the first slot bottom 221 is a slot wall in the first guide slot 220 opposite to the open side.

[0079] Since the test button 300 is supported only by the contact sheet 500 in the first direction OX, the test button 300 cannot be limited in position when being pressed.

[0080] Based on this, the present application uses the first guide slot 220 to limit the test button 300. When the test button 300 drives the contact piece 500 to move along the first direction OX until the contact piece 500 abuts against the contact plate 600, the guide slider 340 abuts against the first slot bottom 221, so that the test button 300 cannot continue to move along the first direction OX. In this way, the reliability of the test button 300 is increased, and the partition 200 can not only guide the test button 300, but also limit the test button 300, so that the partition 200 can achieve the effect of reuse.

[0081] Figure 3 for Figure 2 The enlarged view of part B in Figure 3 as well as Figure 5 As shown, the abutting portion 320 includes an extension arm 321 and a pressure block 322. One end of the extension arm 321 is connected to the pressing portion 310, and the other end of the extension arm 321 is connected to the pressure block 322, and the pressure block 322 is used to abut against the contact piece 500.

[0082] The extension arm 321 may be cylindrical or prismatic, etc. The extension arm 321 may be integrally formed with the pressing portion 310 , or the extension arm 321 and the pressing portion 310 may be separately formed and then assembled.

[0083] The pressure block 322 may be prism-shaped. The pressure block 322 may be integrally formed with the extension arm 321, or the pressure block 322 may be separately formed with the extension arm 321 and then assembled. The pressure block 322 may be provided with an arc chamfer on the side close to the contact sheet 500, which increases the contact area between the pressure block 322 and the contact sheet 500 and protects the contact sheet 500 to a certain extent, reduces the problem of the corners of the pressure block 322 crushing the contact sheet 500, and increases the service life of the contact sheet 500.

[0084] In summary, the test button 300 and the contact piece 500 are in opposite or non-opposite positions. Based on the situation that the test button 300 and the contact piece 500 are not in opposite positions, the present application sets the extension arm 321 so that the test button 300 can effectively abut against the contact piece 500, and sets the pressure block 322 on the extension arm 321 to increase the reliability of the abutment between the test button 300 and the contact piece 500. In addition, the setting of the extension arm 321 does not necessarily require the test button 300 to be set directly opposite to the contact piece 500. According to the setting position of the test button 300, the appropriate length of the extension arm 321 can be selected so that the pressure block 322 and the contact piece 500 are in opposite positions, thereby increasing the flexibility of setting the test button 300.

[0085] Figure 8 for Figure 2 Schematic diagram of the structure after adding a partition to the structure shown. Fig. 9 for Figure 8 Magnified view of section C. Figure 8 as well as Fig. 9 As shown, the partition plate 200 is provided with a first limiting groove 230, and the guide limiting structure 210 is configured as the first limiting groove 230. The matching structure 330 is configured as an extension arm 321. In the first direction OX, the projection of the extension arm 321 at least partially falls into the first limiting groove 230, and when the test button 300 moves along the first direction OX, the extension arm 321 slides along the first limiting groove 230.

[0086] The first limiting groove 230 is a groove structure provided on the partition 200. The shape of the first limiting groove 230 can be selected according to the shape of the extension arm 321, so that the first limiting groove 230 can more effectively limit the test button 300. The first limiting groove 230 can be integrally formed with the partition 200 when the partition 200 is formed, and the first limiting groove 230 can also be provided on the partition 200 by carving or cutting after the partition 200 is formed.

[0087] Since the projection of the extension arm 321 at least partially falls into the first limiting groove 230 , the extension arm 321 at least partially falls into the first limiting groove 230 during the movement.

[0088] Through the above settings, a first limiting groove 230 is set on the partition 200, the first limiting groove 230 is configured as a guiding limiting structure 210, and the extension arm 321 is configured as a matching structure 330. When the test button is pressed, the first limiting groove 230 can guide the extension arm 321 in the first direction OX.

[0089] Please continue to refer to Figure 6 as well as Figure 7As shown, the first limiting groove 230 includes a second groove bottom 231 . When the test button 300 moves along the first direction OX until the abutting portion 320 abuts against the contact piece 500 , the extension arm 321 abuts against the second groove bottom 231 .

[0090] The side of the first limiting groove 230 facing the test button 300 is an open side, so that the extension arm 321 extends from the open side into the first limiting groove 230. Based on this, the second groove bottom 231 is a groove wall in the first limiting groove 230 opposite to the open side.

[0091] Since the test button 300 is supported only by the contact sheet 500 in the first direction OX, the test button 300 cannot be limited in position when being pressed.

[0092] Based on this, the present application uses the first limiting groove 230 to limit the test button 300. When the test button 300 drives the contact piece 500 to move along the first direction OX until the contact piece 500 abuts against the contact plate 600, the extension arm 321 abuts against the second groove bottom 231, so that the test button 300 cannot continue to move along the first direction OX, thereby increasing the reliability of the test button 300.

[0093] like Figure 2 as well as Figure 3 As shown, at least one side of the guide slider 340 abuts against the inner wall of the base 100 .

[0094] The guide slider 340 may abut against the inner wall of the base 100 on one side or on both sides. When the guide slider 340 moves along the first direction OX, the guide slider 340 is in sliding contact with the inner wall of the base 100 .

[0095] Through the above-mentioned arrangement, at least one side of the guide slider 340 is in contact with the inner wall of the base 100, and the inner wall of the base 100 can be used to guide and limit the guide slider 340. When the test button 300 moves along the first direction OX, the guide slider 340 is always in contact with the inner wall of the base 100. In this way, the possibility of the test button 300 shaking in directions other than the first direction OX is reduced, thereby increasing the stability of the test button 300 during use.

[0096] A stopper 700 may be provided on the inner wall of the base 100, and the guide slider 340 may abut against the inner wall of the base 100 on one side, and at the same time, abut against the stopper 700 provided on the inner wall of the base 100 on the other side. In this way, the stability of the movement of the test button 300 may be further increased.

[0097] In a possible design, a second guide slot is provided at a position opposite to the base 100 and the guide slider 340. The portion of the guide slider 340 close to the base 100 is located in the second guide slot, and when the test button 300 moves along the first direction OX, the guide slider 340 also slides along the second guide slot.

[0098] The second guide groove may be a groove structure provided on the base 100. The second guide groove may be integrally formed with the base 100 when the base 100 is formed, or the second guide groove may be provided on the base 100 by cutting or carving after the base 100 is formed. The width of the second guide groove may be the same as the width of the guide slider 340, or the width of the second guide groove may be slightly larger than the width of the guide slider 340, so that the guide slider 340 can be effectively placed in the second guide groove.

[0099] Through the above-mentioned setting, a second guide groove is provided on the base 100, and the part of the guide slider 340 close to the base 100 is located in the second guide groove. When the test button 300 moves along the first direction OX, the second guide groove can be used to guide the guide slider 340. Since part of the guide slider 340 is located in the second guide groove, the second guide groove can also play a certain limiting role on the guide slider 340.

[0100] Fig.10 A schematic diagram of the structure of the cover plate provided in the embodiment of the present application is shown in FIG. Figure 1 as well as Fig.10 As shown, the housing assembly further includes a cover plate 400, and a third guide slot 410 is provided at a position of the cover plate 400 opposite to the guide slider 340. The portion of the guide slider 340 close to the cover plate 400 is located in the third guide slot 410, and when the test button 300 moves along the first direction OX, the guide slider 340 also slides along the third guide slot 410.

[0101] The cover plate 400 and the base 100 are covered to form an installation space, and the operating mechanism of the residual current operated circuit breaker is located in the space between the cover plate 400 and the partition plate 200.

[0102] The third guide slot 410 is a groove structure provided on the cover plate 400. The third guide slot 410 can be integrally formed with the cover plate 400, or the third guide slot 410 can be provided on the cover plate 400 by cutting or engraving after the cover plate 400 is formed. The width of the third guide slot 410 can be the same as the thickness of the guide slider 340, or the width of the third guide slot 410 can be slightly greater than the thickness of the guide slider 340.

[0103] When the cover plate 400 is covered with the base 100 , part of the guide slider 340 is located in the third guide slot 410 .

[0104] Through the above-mentioned configuration, the guide slider 340 is guided by the third guide groove 410 provided on the cover plate 400. When the test button 300 moves along the first direction OX, the operation stability of the test button 300 can be further improved. In addition, the configuration of the third guide groove 410 can also limit the guide slider 340 in directions other than the first direction OX, thereby reducing the possibility of shaking of the test button 300 when moving along the first direction OX and increasing the operation stability of the test button 300.

Claims

1. A housing assembly, applied to a residual current operated circuit breaker, the residual current operated circuit breaker comprising a contact piece and a contact plate, the contact plate being used to be electrically connected to a leakage test circuit of the residual current operated circuit breaker, characterized in that: The housing assembly comprises: A base having a mounting hole, wherein the mounting hole penetrates the base along a first direction; A partition plate is connected to the base, and an installation space is formed between the partition plate and the base; The test button comprises a pressing portion and an abutting portion connected to each other, wherein one end of the pressing portion away from the abutting portion passes through the mounting hole from the mounting space and is exposed to the base, the abutting portion is located in the mounting space, and one end of the abutting portion away from the pressing portion is used to abut against the contact piece; the abutting portion can press against the contact piece to electrically connect the contact piece to the contact plate; The partition is provided with a guide and limit structure, and the test button is provided with a matching structure, and the guide and limit structure matches with the matching structure.

2. The housing assembly according to claim 1, characterized in that: The test button further includes a guide slider, the guide slider is connected to the pressing portion and is located in the installation space, and the matching structure is configured as the guide slider; A first guide slot is provided at a position where the partition plate is opposite to the guide slide block, and the guide limiting structure is configured as the first guide slot; The guide sliding block is partially located in the first guide sliding groove, and when the test button moves along the first direction, the guide sliding block slides along the first guide sliding groove.

3. The housing assembly according to claim 2, characterized in that: The first guide chute includes a first chute bottom; When the test button drives the contact piece to move along the first direction until the contact piece abuts against the contact plate, the guide sliding block abuts against the bottom of the first groove.

4. The housing assembly according to claim 1, characterized in that: The abutment portion includes an extension arm and a pressure block; One end of the extension arm is connected to the pressing portion, and the other end of the extension arm is connected to the pressure block, and the pressure block is used to abut against the contact piece.

5. The housing assembly according to claim 4, characterized in that: The partition plate is provided with a first limiting groove, and the guide limiting structure is configured as the first limiting groove; The mating structure is configured as the extension arm; In the first direction, the projection of the extension arm at least partially falls into the first limiting groove, and when the test button moves along the first direction, the extension arm slides along the first limiting groove.

6. The housing assembly according to claim 5, characterized in that: The first limiting groove includes a second groove bottom; When the test button moves along the first direction until the abutting portion abuts against the contact piece, the extension arm abuts against the second groove bottom.

7. The housing assembly according to claim 2, characterized in that: At least one side of the guide sliding block is in contact with the inner wall of the base.

8. The housing assembly according to claim 2, characterized in that: A second guide slot is provided at a position where the base is opposite to the guide slide block; The portion of the guide sliding block close to the base is located in the second guide sliding groove. When the test button moves along the first direction, the guide sliding block also slides along the second guide sliding groove.

9. The housing assembly according to claim 2, characterized in that: The housing assembly further comprises a cover plate, and a third guide slot is provided at a position of the cover plate opposite to the guide slider; The portion of the guide sliding block close to the cover plate is located in the third guide sliding groove. When the test button moves along the first direction, the guide sliding block also slides along the third guide sliding groove.

10. A residual current operated circuit breaker, characterized in that: A housing assembly comprising a contact sheet, a contact plate and any one of claims 1 to 9; The contact sheet and the contact plate are located in the installation space of the housing assembly.

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