Circuit breaker

Abstract

The utility model provides a circuit breaker, and relates to the technical field of switches. The circuit breaker comprises a shell, a handle assembly and a mounting cover, wherein an avoiding groove is formed in one surface of the shell. The shell is provided with a first surface and a second surface which are adjacent to each other, the first surface is provided with a mounting hole, the second surface is provided with a receding groove, the receding groove penetrates to one side, close to the first surface, of the second surface, and the mounting hole is communicated with the receding groove. The handle assembly comprises a handle body and an extending part arranged on the outer wall of the handle body, the handle body is located in the shell, the extending part extends out of the shell from the receding groove, and one end of the rotating axis of the handle body corresponds to the mounting hole. The mounting cover is detachably connected with the shell, and the mounting cover is arranged at the position of the mounting hole. The detection or replacement efficiency of the handle assembly can be improved, and the cost is saved.

Description

Technical Field

[0001] This application relates to the field of switch technology, and particularly to a circuit breaker. Background Art

[0002] In the prior art, a circuit breaker usually includes two shells to encapsulate and protect the components of the circuit breaker.

[0003] The two shells of the circuit breaker in the prior art are usually connected by rivets. Thus, when detecting or replacing components of the circuit breaker such as a handle and a energy storage component, it is necessary to remove the rivets to disassemble the two shells. And after detection or replacement, it is necessary to use rivets to connect the two shells again.

[0004] In this case, not only the disassembly and assembly are relatively cumbersome, reducing the detection or replacement efficiency, but also the frequent disassembly and assembly of the shells will cause waste of rivets and affect the shell structure at the same time. Utility Model Content

[0005] This application provides a circuit breaker, which can improve the detection or replacement efficiency of the handle assembly and save costs.

[0006] This application provides a circuit breaker, which includes a shell, a handle assembly and a mounting cover. The shell has an adjacent first surface and a second surface. An installation hole is provided on the first surface, and an avoidance groove is provided on the second surface. The avoidance groove penetrates to the side of the second surface close to the first surface, and the installation hole is communicated with the avoidance groove. The handle assembly includes a handle body and an extension part arranged on the outer wall of the handle body. The handle body is located inside the shell, the extension part extends out of the shell from the avoidance groove, and one end of the rotation axis of the handle body corresponds to the installation hole. The mounting cover is detachably connected to the shell and is arranged at the position of the installation hole.

[0007] When adopting the above technical solution, the handle body is located inside the shell, and the extension part extends out of the shell from the avoidance groove. During actual operation, the operator can contact the handle body, which is convenient for directly operating the handle assembly to rotate the handle assembly to control the on-off of the current passing through the circuit breaker. The avoidance groove penetrates to the side of the second surface close to the first surface, and the installation hole is communicated with the avoidance groove. Thus, during the process of disassembling the handle assembly, the handle assembly can be taken off the shell through the installation hole.

[0008] The mounting cover is disposed at the position of the mounting hole, and the mounting cover is detachably connected to the housing. When the handle assembly needs to be detected or replaced, the mounting cover can be first detached from the housing, and then the handle assembly is moved along the extending direction of the avoidance groove, and the handle assembly is made to pass through the mounting hole so that the handle assembly is separated from the housing, so as to detect or replace the handle assembly. After detection or replacement, the handle body is aligned with the mounting hole, and the extending portion is aligned with the avoidance groove. Further, the handle assembly is made to pass through the mounting hole, and the handle assembly is moved along the extending direction of the avoidance groove to a preset position. After the handle assembly is installed, the mounting cover is installed on the housing. In this way, the disassembly and assembly of the handle assembly are completed. Compared with the prior art, it is not necessary to disassemble and assemble the two housing bodies of the circuit breaker that are riveted together, the operation is relatively convenient, and it will not cause waste of materials, will not damage the housing, and reduces the cost.

[0009] In a possible design, one of a protrusion and a recess is provided on the hole wall of the mounting hole, and the other of the protrusion and the recess is provided at a portion of the mounting cover that cooperates with the hole wall of the mounting hole. The protrusion cooperates with the recess to position the mounting cover on the housing.

[0010] When the above technical solution is adopted, during the process of installing the mounting cover on the housing, the protrusion and the recess can be aligned and matched in advance, and it is not necessary to adjust the position of the mounting cover in the circumferential direction of the handle body, which can improve the installation efficiency of the mounting cover. Further, the protrusion and the recess cooperate with each other to realize the positioning of the mounting cover and avoid the rotation and misalignment of the mounting cover relative to the mounting hole.

[0011] In a possible design, the circuit breaker further includes a reaction spring, and both ends of the reaction spring elastically act on the mounting cover and the handle body respectively, and are used to apply a torsional force for the handle assembly to rotate from the open position to the closed position.

[0012] When the above technical solution is adopted, the reaction spring can act on the handle assembly. When the current passing through the circuit breaker is too large, it is beneficial for the handle assembly to rotate from the open position to the closed position to cut off the current.

[0013] In a possible design, a guide post is provided on one side of the mounting cover facing the handle assembly, and the end of the guide post away from the mounting cover passes through the reaction spring and the handle body.

[0014] When the above technical solution is adopted, the setting of the guide post, on the one hand, during installation, the reaction spring and the handle body can be sleeved on the guide post, which is convenient for the installation of the reaction spring and the handle body. On the other hand, after installation is completed, the guide post can be used to limit the positions of the reaction spring and the handle body relative to the housing, avoid the misalignment of the reaction spring and the handle body, and can improve the accuracy of the circuit breaker.

[0015] In a possible design, a first limiting groove is provided on the side of the mounting cover for elastic contact with the reaction spring, and the free end of the reaction spring close to the mounting cover is limited within the first limiting groove.

[0016] When the above technical solution is adopted, the groove wall of the first limiting groove can limit the free end of the reaction spring close to the mounting cover. Whether the handle body rotates from the closed position to the open position or from the open position to the closed position, the free end of the reaction spring close to the mounting cover can always be located within the first limiting groove. Thus, when the handle body rotates from the closed position to the open position and the end of the reaction spring close to the handle body rotates with the rotation of the handle body, the reaction spring can generate torque. When the handle body rotates from the open position to the closed position and the end of the reaction spring close to the handle body rotates with the rotation of the handle body, the reaction spring can apply the generated torque to the handle body, so as to assist the tripping mechanism to drive the handle assembly to quickly rotate from the open position to the closed position to cut off the current and ensure safety.

[0017] In a possible design, a first limiting post is provided on the side of the mounting cover for elastic contact with the reaction spring, and the free end of the reaction spring close to the mounting cover is limited by the first limiting post.

[0018] When the above technical solution is adopted, the free end of the reaction spring close to the mounting cover can abut against the first limiting post. Whether the handle body rotates from the closed position to the open position or from the open position to the closed position, the end of the reaction spring close to the handle body rotates with the rotation of the handle body, while the position of the free end of the reaction spring close to the mounting cover remains unchanged. Thus, when the handle body rotates from the closed position to the open position and the end of the reaction spring close to the handle body rotates with the rotation of the handle body, the reaction spring can generate torque. When the handle body rotates from the open position to the closed position and the end of the reaction spring close to the handle body rotates with the rotation of the handle body, the reaction spring can apply the generated torque to the handle body, so as to assist the tripping mechanism to drive the handle assembly to quickly rotate from the open position to the closed position to cut off the current and ensure safety.

[0019] In a possible design, a second limiting groove is provided on the side of the handle body for elastic contact with the reaction spring, and the free end of the reaction spring close to the handle body is limited within the second limiting groove.

[0020] When the above technical solution is adopted, the groove wall of the second limiting groove can limit the free end of the reaction spring close to the handle body. Whether the handle body rotates from the closed position to the open position or from the open position to the closed position, the free end of the reaction spring close to the handle body can always be located within the second limiting groove. In this way, when the handle body rotates from the closed position to the open position and the end of the reaction spring close to the handle body rotates with the rotation of the handle body, the reaction spring can generate torque. When the handle body rotates from the open position to the closed position and the end of the reaction spring close to the handle body rotates with the rotation of the handle body, the reaction spring can apply the generated torque to the handle body, so as to assist the tripping mechanism to drive the handle assembly to quickly rotate from the open position to the closed position to cut off the current and ensure safety.

[0021] In a possible design, a second limiting post is provided on the side of the handle body for elastic contact with the reaction spring, and the free end of the reaction spring close to the handle body is limited by the second limiting post.

[0022] When the above technical solution is adopted, the free end of the reaction spring close to the handle body can abut against the second limiting post. Whether the handle body rotates from the closed position to the open position or from the open position to the closed position, the end of the reaction spring close to the handle body rotates with the rotation of the handle body, while the position of the free end of the reaction spring close to the mounting cover remains unchanged. In this way, when the handle body rotates from the closed position to the open position and the end of the reaction spring close to the handle body rotates with the rotation of the handle body, the reaction spring can generate torque. When the handle body rotates from the open position to the closed position and the end of the reaction spring close to the handle body rotates with the rotation of the handle body, the reaction spring can apply the generated torque to the handle body, so as to assist the tripping mechanism to drive the handle assembly to quickly rotate from the open position to the closed position to cut off the current and ensure safety.

[0023] In a possible design, a connection hole is provided on the mounting cover, and the connection hole is used to fix an external component.

[0024] When the above technical solution is adopted, it is convenient to connect the circuit breaker to an external component. In addition, the number of connection holes opened on the housing can be reduced, avoiding reducing the structural stability of the housing.

[0025] In a possible design, positioning holes and riveting holes are also provided on the mounting cover for connecting accessories or two adjacent circuit breakers.

[0026] When the above technical solution is adopted, it is convenient to connect accessories or two adjacent circuit breakers. Description of the Drawings

[0027] Figure 1Schematic structural diagram of a circuit breaker provided by an embodiment of the present application.

[0028] Figure 2 Partial schematic diagram of the housing provided by an embodiment of the present application.

[0029] Figure 3 Exploded partial view of the circuit breaker provided by an embodiment of the present application Figure 1 。

[0030] Figure 4 Exploded partial view of the circuit breaker provided by an embodiment of the present application Figure 2 。

[0031] Figure 5 For Figure 1 Cross-sectional schematic view at A-A in

[0032] Figure 6 For Figure 5 Enlarged schematic view at B in

[0033] Explanation of reference numerals:

[0034] 1. Housing; 11. Avoidance groove; 12. Mounting hole; 13. Protrusion; 2. Handle assembly; 21. Handle body; 22. Extension; 23. Energy storage member; 3. Mounting cover; 31. Depression; 33. Connection hole; 34. Positioning hole; 35. Riveting hole; 36. Guide post; 4. Reaction spring. Detailed implementation manners

[0035] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein in the specification of this application are only for the purpose of describing specific embodiments, and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the drawings are intended to cover non-exclusive inclusion.

[0037] References to "embodiments" in this specification mean that specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0038] The orientation terms used in the following description are the directions shown in the figures and do not limit the specific structure of the current-limiting module of the present application. For example, in the description of the present application, terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present application.

[0039] In addition, the terms "first", "second", etc. in the specification and claims of the present application or in the above-mentioned drawings are used to distinguish different objects and do not describe a specific order, and may explicitly or implicitly include one or more of such features.

[0040] In the description of the present application, unless otherwise specified, the meaning of "a plurality" refers to two or more (including two). Similarly, "a plurality of groups" refers to two or more groups (including two groups).

[0041] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, the "connection" or "coupling" of mechanical structures may refer to a physical connection. For example, a physical connection may be a fixed connection, such as a fixed connection through a spacer, such as a fixed connection through screws, bolts, or other spacers; a physical connection may also be a detachable connection, such as a snap connection or a clamping connection; a physical connection may also be an integral connection, such as a connection by welding, bonding, or integral molding. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0042] A circuit breaker refers to a switching device that can close, carry, and interrupt the current under normal circuit conditions and can close, carry, and interrupt the current under abnormal circuit conditions within a specified time.

[0043] In the prior art, a circuit breaker generally includes two housings, and these two housings are usually connected by rivets. Thus, when detecting or replacing circuit breaker components such as a handle and an energy storage member installed on the housing, it is necessary to remove the rivets to disassemble the two housings, and then remove the components such as the handle and the energy storage member installed on the housing for detection or replacement.

[0044] Moreover, after detecting or replacing the aforementioned circuit breaker components, it is necessary to reconnect the two housings using rivets again.

[0045] In this case, not only is the disassembly and assembly relatively cumbersome, reducing the efficiency of detecting or replacing circuit breaker components, but also the frequent disassembly and assembly of the housing will cause waste of rivets and affect the housing structure. At the same time, opening the housing will also bring the risk of other parts inside the circuit breaker falling off. Even more seriously, it is necessary to readjust the positions of parts such as bimetallic strips inside the circuit breaker.

[0046] To solve the problems existing in the above prior art, as shown in Figures 1 to 3 This application provides a circuit breaker, which includes a housing 1, a handle assembly 2 and a mounting cover 3. The housing 1 has adjacent first and second surfaces. An installation hole 12 is provided on the first surface, and an avoidance groove 11 is provided on the second surface. The avoidance groove 11 penetrates to the side of the second surface close to the first surface, and the installation hole 12 communicates with the avoidance groove 11. The handle assembly 2 includes a handle body 21 and an extension 22 provided on the outer wall of the handle body 21. The handle body 21 is located inside the housing 1, and the extension 22 extends out of the housing 1 from the avoidance groove 11. One end of the rotation axis of the handle body 21 corresponds to the installation hole 12. The mounting cover 3 is detachably connected to the housing 1, and the mounting cover 3 is provided at the position of the installation hole 12.

[0047] In the case of adopting the above technical solution, the handle body 21 is located inside the housing 1, and the extension 22 extends out of the housing 1 from the avoidance groove 11. During actual operation, the operator can contact the handle body 21, which is convenient for directly operating the handle assembly 2 to rotate the handle assembly 2 to control the on-off of the current passing through the circuit breaker. The avoidance groove 11 penetrates to the side of the second surface close to the first surface, and the installation hole 12 communicates with the avoidance groove 11. Thus, during the process of disassembling the handle assembly 2, the handle assembly 2 can be removed from the housing 1 through the installation hole 12.

[0048] In the embodiments provided by the present application, the mounting cover 3 is disposed at the position of the mounting hole 12, and the mounting cover 3 is detachably connected to the housing 1. When the handle assembly 2 needs to be detected or replaced, the mounting cover 3 can be first detached from the housing 1, and then the handle assembly 2 is moved along the extending direction of the avoidance groove 11, and the handle assembly 2 is made to pass through the mounting hole 12, so that the handle assembly 2 is separated from the housing 1, for detecting or replacing the handle assembly 2. After detection or replacement, the handle body 21 is aligned with the mounting hole 12, and the extending portion 22 is aligned with the avoidance groove 11. Further, the handle assembly 2 is made to pass through the mounting hole 12, and the handle assembly 2 is moved along the extending direction of the avoidance groove 11 to a preset position. After the handle assembly 2 is installed, the mounting cover 3 is installed on the housing 1. In this way, the disassembly and assembly of the handle assembly 2 are completed. Compared with the prior art, there is no need to disassemble and assemble the two housing 1s that are riveted to each other in the circuit breaker, the operation is relatively convenient, and there is no waste of materials, no damage to the housing 1, and the cost is reduced.

[0049] Specifically in implementation, the housing 1 may include a cover body and a base. The cover body is disposed on the base, so that the housing 1 forms a receiving space for receiving circuit breaker components. The cover body and the base may be connected by rivets, and of course, connection methods such as snap connection and bonding may also be used.

[0050] In one example, the base may be a shell-like structure with an open receiving groove, and the cover body 1 may be a plate-like structure that matches the base. After the cover body is disposed on the base, a receiving space is formed between the base and the cover body. In this case, the cover body is the above-mentioned first surface, and the side wall of the base is the above-mentioned second surface. Based on this, the mounting hole is disposed on the cover body, and the avoidance groove is disposed on the side wall of the base.

[0051] In another example, both the base and the cover body may be set as shell-like structures with open receiving grooves. The openings of the base and the cover body are oppositely disposed, and the base and the cover body are connected, so that a receiving space of the housing is formed between the receiving groove of the base and the receiving groove of the cover body. At this time, the mounting hole may be disposed on the bottom wall of the base, and of course, the mounting hole may also be disposed on the bottom wall of the cover body, and no specific limitation is made here. Exemplarily, when the mounting hole is disposed on the bottom wall of the cover body, the bottom wall of the cover body is the above-mentioned first surface. At this time, the avoidance groove may be only disposed on the side wall of the cover body. Of course, the avoidance groove may be partially located on the side wall of the cover body and partially located on the side wall of the base.

[0052] Furthermore, the cover body may be a shell-like structure with an open receiving groove, and the base may be a plate-like structure that matches the cover body. After the cover body is disposed on the base, a receiving space is formed between the base and the cover body. In this case, the bottom wall of the cover body is the above-mentioned first surface, and the side wall of the cover body is the above-mentioned second surface. The mounting hole is disposed on the bottom wall of the cover body, and the avoidance groove is disposed on the side wall of the cover body.

[0053] In addition, the shape, specific dimensions, material, etc. of the housing are not specifically limited here and shall be subject to the actual situation.

[0054] In actual situations, the mounting cover 3 and the mounting hole 12 are matched. The mounting cover 3 and the housing 1 can be connected by detachable connection methods such as snap connection and threaded connection. Of course, this is only an example here and is not a specific limitation. In the embodiments provided in this application, the mounting cover 3 and the housing 1 can be connected by screws. For the convenience of description, hereinafter in this article, only the example where the mounting cover 3 and the housing 1 are connected by screws will be used for illustration.

[0055] Specifically, the mounting cover 3 can only include a capping portion, and the capping portion covers the position of the mounting hole. Threaded holes can be opened at the four peripheral edges of the capping portion and at the position of the housing 1 close to the mounting hole 12, so as to facilitate the screw to pass through the mounting cover and insert into the threaded hole on the housing 1, and rotate the screw to connect the mounting cover 3 and the housing 1.

[0056] Furthermore, for the convenience of connecting the mounting cover 3 and the housing 1, the mounting cover 3 can further include a connecting portion in addition to the capping portion, and the capping portion and the connecting portion are connected to each other. The contour of the capping portion matches the contour of the mounting hole 12. To ensure that the side of the mounting cover 3 away from the handle body is coplanar with the side of the housing 1 for setting the mounting cover, a mounting groove can be opened at the position of the housing 1 corresponding to the connecting portion, that is, the wall thickness of the corresponding part of the housing 1 for the connecting portion is thinned to place the connecting portion. At this time, threaded holes can be opened on the connecting portion, and at the same time, threaded holes corresponding to the threaded holes on the connecting portion are opened on the housing 1. In this case, the mounting cover 3 and the housing 1 can be connected by screws.

[0057] The handle body 21 can be of a cylindrical structure, and the handle body 21 and the extension portion 22 can be integrally formed. Of course, the handle body 21 and the extension portion 22 can also be of a split type. When the handle body 21 and the extension portion 22 are of a split type, the connection method between the extension portion 22 and the handle body 21 can be threaded connection, snap connection, welding and other methods, which are not specifically limited here.

[0058] In actual situations, as Figure 3 shown, the handle assembly 2 can further include an energy storage member 23, and the energy storage member is arranged on the side of the handle body away from the mounting cover. When it is necessary to detect or replace the handle body 21 and the energy storage member 23, the screw for connecting the mounting cover 3 and the housing 1 can be removed, and then the handle body 21 is taken off, and the energy storage member can be separated from the housing 1 together with the handle body 21. After separating the handle body 21 and the energy storage member 23, the handle body 21 and the energy storage member 23 can be detected or replaced.

[0059] After detecting or replacing the handle and the energy storage member 23 and installing the handle body 21 and the energy storage member 23 at the preset positions, the screw removed when the mounting cover is detached from the housing 1 can be used to reconnect the mounting cover 3 and the housing 1.

[0060] In this way, the screw can be reused multiple times, avoiding waste of materials and playing a role in cost saving.

[0061] In addition, it should be noted that the orthographic projection of the handle body 21 on the mounting cover 3 along its rotation axis direction is located inside the mounting cover, so that the mounting cover 3 limits the handle body 21 on the rotation axis of the handle body 21, avoiding the handle body 21 moving in the direction close to the mounting cover 3 on the rotation axis during the use of the circuit breaker, resulting in misalignment, reducing the cooperation accuracy between the handle body 21 and other components of the circuit breaker, and affecting the sensitivity of the circuit breaker.

[0062] In a possible implementation, referring to Figure 3 and Figure 4 As shown, one of the protruding portion 13 and the recessed portion 31 is provided on the hole wall of the mounting hole 12, and the other of the protruding portion 13 and the recessed portion 31 is provided at the portion of the mounting cover 3 that cooperates with the hole wall of the mounting hole 12. The protruding portion 13 and the recessed portion 31 cooperate with each other to position the mounting cover 3 on the housing 1.

[0063] In this way, during the process of installing the mounting cover 3 on the housing 1, the protruding portion 13 and the recessed portion 31 can be aligned and matched in advance, without the need to adjust the position of the mounting cover 3 in the circumferential direction of the handle body 21, which can improve the installation efficiency of the mounting cover 3. Further, the protruding portion 13 and the recessed portion 31 cooperate with each other to achieve the positioning of the mounting cover 3 and avoid the mounting cover 3 rotating and misaligning relative to the mounting hole 12.

[0064] In actual situations, the protruding portion 13 can be provided at the portion of the mounting cover 3 that cooperates with the hole wall of the mounting hole 12, and correspondingly, the recessed portion 31 is provided on the hole wall of the mounting hole 12. Of course, the recessed portion 31 can also be provided at the portion of the mounting cover 3 that cooperates with the hole wall of the mounting hole 12, and the protruding portion 13 is provided on the hole wall of the mounting hole 12, which is not specifically limited here.

[0065] In specific implementation, multiple protruding portions 13 can also be provided at the portion of the mounting cover 3 that cooperates with the hole wall of the mounting hole 12, and correspondingly, multiple recessed portions 31 are provided on the hole wall of the mounting hole 12.

[0066] Moreover, protruding portions 13 and recessed portions 31 can be alternately arranged at the portion of the mounting cover 3 that cooperates with the hole wall of the mounting hole 12. Correspondingly, protruding portions 13 and recessed portions 31 are alternately arranged on the hole wall of the mounting hole 12, and the protruding portions 13 on the mounting cover cooperate with the recessed portions 31 on the hole wall of the mounting hole 12, and the recessed portions 31 on the mounting cover 3 cooperate with the protruding portions 13 on the hole wall of the mounting hole 12. In this way, the positioning of the mounting cover 3 can be enhanced, and the structural stability of the circuit breaker can be improved.

[0067] It should be noted that during the process of machining and forming the mounting cover 3, after machining the main body of the mounting cover 3, a plurality of grooves can be arranged at intervals at the portion of the mounting cover 3 that cooperates with the hole wall of the mounting hole 12 to form a plurality of recessed portions 31, and the protruding portions 13 are formed between two adjacent recessed portions 31. Of course, the recessed portions and the protruding portions can also be integrally formed with the mounting cover by casting.

[0068] As an alternative, please refer to the attached Figures 3 to 6 , the circuit breaker provided by the present application further includes a reaction spring 4. The two ends of the reaction spring 4 elastically act on the mounting cover 3 and the handle body 21 respectively, and are used to apply a torsional force for rotating the handle assembly 2 from the open position to the closed position.

[0069] It should be noted that Figure 5 is Figure 1 the cross-sectional view at A-A in Figure 1 . Specifically, first, a plane is defined, and this plane is parallel to the plane where the avoidance groove 11 in the housing 1 is located. The circuit breaker is cut along this plane, and a view along the Figure 5 shown arrow direction is obtained, and the cross-sectional view shown in

[0070] can be obtained. Exemplarily, the reaction spring 4 can be a telescopic spring or a torsion spring, etc., specifically depending on the actual situation.

[0071] Specifically, one end of the reaction spring 4 is limited to the mounting cover, and the other end of the reaction spring 4 is limited to the handle body 21. During the process of the handle assembly 2 rotating from the closed position to the open position, the end of the reaction spring 4 close to the handle body rotates as the handle body rotates. And during this process, since the end of the reaction spring close to the mounting cover 3 is limited to the mounting cover 3 with an unchanged position, the position of the end of the reaction spring 4 close to the mounting cover 1 remains unchanged. In this way, a torsional force is generated on the reaction spring 4. And the direction of this torsional force is the same as the direction of the handle assembly 2 rotating from the open position to the closed position.

[0072] In view of the above analysis, when the current passing through the circuit breaker is too large and the tripping mechanism of the circuit breaker operates, driving the handle assembly 2 to rotate from the open position to the closed position, the reaction spring 4 can drive the handle assembly 2 to rotate from the open position to the closed position through the aforementioned torque-assisted tripping mechanism to cut off the current and ensure safety.

[0073] In some embodiments, as shown in Figures 3 to 6 a guide post 36 is provided on one side of the mounting cover 3 facing the handle assembly, and the end of the guide post 36 away from the mounting cover 3 passes through the reaction spring 4 and the handle body 21.

[0074] The setting of the guide post 36, on the one hand, during installation, the reaction spring 4 and the handle body 21 can be sleeved on the guide post 36, facilitating the installation of the reaction spring 4 and the handle body 21. On the other hand, after the installation is completed, the guide post 36 can be used to limit the positions of the reaction spring 4 and the handle body 21 relative to the housing 1, preventing the reaction spring 4 and the handle body 21 from being misaligned, and improving the accuracy of the circuit breaker.

[0075] It should be noted that in the embodiments provided in the present application, the guide post 36 can be a columnar structure with a certain cross-sectional size or a stepped columnar structure, so that the cross-sectional size of the guide post 36 matches the inner diameter of the reaction spring 4 and the inner hole diameter size of the handle body 21 for passing through the guide post 36.

[0076] Exemplarily, the guide post 36 can include a first cylindrical section and a second cylindrical section connected to each other. The first cylindrical section is used to cooperate with the reaction spring 4, and the second cylindrical section can be used to cooperate with the handle body 21. When the inner diameter of the reaction spring 4 is equal to the inner hole diameter size of the handle body 21 for passing through the guide post 36, the diameters of the first cylindrical section and the second cylindrical section of the guide post 36 are the same, that is, the guide post 36 is a columnar structure with a certain cross-sectional size. When the inner diameter of the reaction spring 4 is greater than the inner hole diameter size of the handle body 21 for passing through the guide post 36, the diameter of the first cylindrical section is greater than the diameter of the second cylindrical section. When the inner diameter of the reaction spring 4 is less than the inner hole diameter size of the handle body 21 for passing through the guide post 36, the diameter of the first cylindrical section is less than the diameter of the second cylindrical section.

[0077] As an example, a first limiting groove is provided on the side of the mounting cover 3 for elastically contacting the reaction spring 4, and the free end of the reaction spring 4 close to the mounting cover 3 is limited in the first limiting groove.

[0078] At this time, the groove wall of the first limiting groove can limit the free end of the reaction spring 4 close to the mounting cover. Whether the handle body 21 rotates from the closed position to the open position or from the open position to the closed position, the free end of the reaction spring 4 close to the mounting cover 3 can always be located within the first limiting groove. In this way, when the handle body 21 rotates from the closed position to the open position and the end of the reaction spring 4 close to the handle body 21 rotates with the rotation of the handle body 21, the reaction spring 4 can generate torque. When the handle body 21 rotates from the open position to the closed position and the end of the reaction spring 4 close to the handle body 21 rotates with the rotation of the handle body 21, the reaction spring 4 can apply the generated torque to the handle body 21, so as to assist the tripping mechanism to drive the handle assembly 2 to quickly rotate from the open position to the closed position to cut off the current and ensure safety.

[0079] During specific implementation, a first limiting groove can be opened on the side of the mounting cover 3 that elastically contacts the reaction spring 4. During installation, a free end of the reaction spring 4 can be placed within the first limiting groove.

[0080] As another example, a first limiting post is provided on the side of the mounting cover 3 that elastically contacts the reaction spring 4, and the free end of the reaction spring 4 close to the mounting cover 3 is limited by the first limiting post. The free end of the reaction spring 4 close to the mounting cover 3 can abut against the first limiting post. Specifically, the free end of the reaction spring 4 close to the mounting cover 3 abuts against the outer wall of one side of the first limiting post along the circumferential direction of the reaction spring 4.

[0081] Similarly, whether the handle body 21 rotates from the closed position to the open position or from the open position to the closed position, the end of the reaction spring 4 close to the handle body 21 rotates with the rotation of the handle body 21, while the position of the free end of the reaction spring 4 close to the mounting cover 3 remains unchanged. In this way, when the handle body 21 rotates from the closed position to the open position and the end of the reaction spring 4 close to the handle body 21 rotates with the rotation of the handle body 21, the reaction spring 4 can generate torque. When the handle body 21 rotates from the open position to the closed position and the end of the reaction spring 4 close to the handle body 21 rotates with the rotation of the handle body 21, the reaction spring 4 can apply the generated torque to the handle body 21, so as to assist the tripping mechanism to drive the handle assembly 2 to quickly rotate from the open position to the closed position to cut off the current and ensure safety.

[0082] During specific implementation, a boss can also be provided on the side of the mounting cover 3 that elastically contacts the reaction spring 4, and one side wall of the boss in the circumferential direction of the reaction spring 4 can achieve the limitation of the free end of the reaction spring 4.

[0083] Thus, in specific implementation, the limiting method for the free end of the reaction spring 4 close to the mounting cover 3 can be selected from the first limiting groove, the first limiting post or the way of setting a boss, which enriches the limiting methods for the free end of the reaction spring 4 and is convenient for selection and setting according to the actual situation.

[0084] Furthermore, a second limiting groove is provided on the side of the handle body 21 for elastic contact with the reaction spring 4, and the free end of the reaction spring 4 close to the handle body 21 is limited in the second limiting groove.

[0085] At this time, the groove wall of the second limiting groove can limit the free end of the reaction spring 4 close to the handle body 21. Whether the handle body 21 rotates from the closed position to the open position or from the open position to the closed position, the free end of the reaction spring 4 close to the handle body 21 can always be located in the second limiting groove. Thus, when the handle body 21 rotates from the closed position to the open position and the end of the reaction spring 4 close to the handle body 21 rotates with the rotation of the handle body 21, the reaction spring 4 can generate a torque. When the handle body 21 rotates from the open position to the closed position and the end of the reaction spring 4 close to the handle body 21 rotates with the rotation of the handle body 21, the reaction spring 4 can apply the generated torque to the handle body 21, so as to assist the tripping mechanism to drive the handle assembly 2 to quickly rotate from the open position to the closed position to cut off the current and ensure safety.

[0086] In specific implementation, a second limiting groove can be formed on the side of the handle body 21 for elastic contact with the reaction spring 4. During installation, the other free end of the reaction spring 4 can be placed in the second limiting groove.

[0087] In addition to the above, a second limiting post is provided on the side of the handle body 21 for elastic contact with the reaction spring 4, and the free end of the reaction spring 4 close to the handle body 21 is limited by the second limiting post. The free end of the reaction spring 4 close to the handle body 21 can resist against the second limiting post. Specifically, the free end of the reaction spring 4 close to the handle body 21 is in abutting contact with the outer wall of the first limiting post on one side in the circumferential direction of the reaction spring 4.

[0088] Similarly, whether the handle body 21 rotates from the closed position to the open position or from the open position to the closed position, one end of the reaction spring 4 close to the handle body 21 rotates as the handle body 21 rotates, while the free end position of the reaction spring 4 close to the mounting cover 3 remains unchanged. Thus, when the handle body 21 rotates from the closed position to the open position and one end of the reaction spring 4 close to the handle body 21 rotates as the handle body 21 rotates, the reaction spring 4 can generate torque. When the handle body 21 rotates from the open position to the closed position and one end of the reaction spring 4 close to the handle body 21 rotates as the handle body 21 rotates, the reaction spring 4 can apply the generated torque to the handle body 21 to facilitate the auxiliary tripping mechanism to drive the handle assembly 2 to quickly rotate from the open position to the closed position to cut off the current and ensure safety.

[0089] In specific implementation, a boss can also be provided on the side of the handle body 21 for elastic contact with the reaction spring 4, and one side wall of the boss in the circumferential direction of the reaction spring 4 can limit the free end of the reaction spring 4.

[0090] Thus, in specific implementation, the limiting method for the free end of the reaction spring 4 close to the handle body 21 can be selected as the second limiting groove, the second limiting post or the method of providing a boss, which enriches the limiting methods for the free end of the reaction spring 4 and is convenient for selection and setting according to the actual situation.

[0091] It should be noted that a first limiting post or a boss is provided on the side of the mounting cover 3 for elastic contact with the reaction spring 4, and a second limiting post or a boss is provided on the side of the handle body 21 for elastic contact with the reaction spring 4. When the handle assembly 2 is rotated to make the handle body 21 rotate from the closed position to the open position, the acting force directions on both ends of the reaction spring 4 are opposite to ensure that the reaction spring 4 applies a torsion force to the handle assembly 2 to rotate from the open position to the closed position.

[0092] In a possible design, referring to Figure 1 and Figure 3 , a connection hole 33 is provided on the mounting cover 3, and the connection hole 33 is used to fix an external component. Thus, it is convenient to connect the circuit breaker with the external component. In addition, the number of connection holes 33 opened on the housing 1 can be reduced to avoid reducing the structural stability of the housing 1. In specific implementation, the external component can be a padlock or the like.

[0093] Furthermore, in order to facilitate the connection of accessories or the connection of two adjacent circuit breakers, a positioning hole 34 and a riveting hole 35 can be opened on the mounting cover 3 to connect accessories or two adjacent circuit breakers.

[0094] Specifically, when connecting two adjacent circuit breakers, the positioning holes 34 on the mounting covers 3 of the two adjacent circuit breakers can be aligned and matched, and then the rivet holes on the mounting covers 3 of the two adjacent circuit breakers are riveted using rivets.

[0095] In the embodiments provided in the present application, the accessory may refer to an auxiliary handle, an electric operating mechanism, a handle locking device, etc.

Claims

1. A circuit breaker, characterized in that, Comprising: A housing having adjacent first and second surfaces; an installation hole is provided on the first surface, and an avoidance groove is provided on the second surface, the avoidance groove penetrating to the side of the second surface close to the first surface, and the installation hole communicating with the avoidance groove; A handle assembly including a handle body and an extension provided on the outer wall of the handle body; the handle body is located inside the housing, and the extension extends out of the housing from the avoidance groove; one end of the rotation axis of the handle body corresponds to the installation hole; An installation cover detachably connected to the housing, the installation cover being provided at the position of the installation hole.

2. The circuit breaker according to claim 1, characterized in that, One of a protrusion and a recess is provided on the hole wall of the installation hole, and the other of the protrusion and the recess is provided at the portion of the installation cover that cooperates with the hole wall of the installation hole; The protrusion cooperates with the recess to position the installation cover on the housing.

3. The circuit breaker according to claim 1, wherein The circuit breaker further includes a reaction spring, and both ends of the reaction spring elastically act on the installation cover and the handle body respectively, for applying a torsional force to the handle assembly to rotate from the open position to the closed position.

4. The circuit breaker according to claim 3, wherein, A guide post is provided on the side of the installation cover facing the handle assembly, and the end of the guide post away from the installation cover passes through the reaction spring and the handle body.

5. The circuit breaker according to claim 3, characterized in that, A first limit groove is provided on the side of the installation cover for elastically contacting the reaction spring, and the free end of the reaction spring close to the installation cover is limited in the first limit groove.

6. The circuit breaker according to claim 3, characterized in that, A first limit post is provided on the side of the installation cover for elastically contacting the reaction spring, and the free end of the reaction spring close to the installation cover is limited by the first limit post.

7. The circuit breaker according to any one of claims 3 to 6, characterized in that, A second limit groove is provided on the side of the handle body for elastically contacting the reaction spring, and the free end of the reaction spring close to the handle body is limited in the second limit groove.

8. The circuit breaker according to any one of claims 3 to 6, characterized in that, A second limit post is provided on the side of the handle body for elastically contacting the reaction spring, and the free end of the reaction spring close to the handle body is limited by the second limit post.

9. The circuit breaker according to claim 1, characterized in that, A connection hole is provided on the installation cover, and the connection hole is used for fixing an external component.

10. The circuit breaker according to claim 1, characterized in that, The installation cover is further provided with positioning holes and riveting holes for connecting accessories or two adjacent circuit breakers.

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