A circuit breaker
By setting limiting and restricting parts on the circuit breaker base, the problem of low reliability of the contact system is solved, the contact reliability between the moving contact and the stationary contact is improved, the installation is simplified, and the production cost is reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DELIXI ELECTRIC
- Filing Date
- 2025-07-29
- Publication Date
- 2026-07-14
AI Technical Summary
The contact system of existing circuit breakers has low reliability, which leads to the displacement of the stationary contact position and affects the stability of current flow.
By setting limiting parts and restricting parts on the base of the circuit breaker, the stationary contact is restricted in the arrangement direction of the wiring terminals and contact terminals and the arrangement direction of the side plates, respectively, reducing the possibility of movement and shaking of the stationary contact and improving the fixation of the stationary contact.
It enhances the reliable contact between the moving and stationary contacts, improves the reliability of the contact system, reduces production costs, and simplifies the installation process.
Smart Images
Figure CN224501859U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of electrical equipment technology, and more particularly to a circuit breaker. Background Technology
[0002] A circuit breaker is a switching device used in a circuit. Its core function is to automatically disconnect the circuit when faults such as overload, short circuit, or undervoltage occur, preventing damage to electrical equipment or safety accidents such as fires. Circuit breakers combine manual switching and automatic protection functions, making them an indispensable safety component in power systems, industrial equipment, and household electricity.
[0003] The contact system is a core component of a circuit breaker, playing a crucial role in its normal operation and fault protection. A contact system typically consists of moving and stationary contacts. When the moving and stationary contacts are in contact, current can flow normally within the circuit breaker; when they separate, the current is interrupted. However, current contact systems suffer from relatively low reliability in existing technologies. Utility Model Content
[0004] This application provides a circuit breaker to improve the reliability of the contact system.
[0005] In a first aspect, this application provides a circuit breaker. The circuit breaker includes a base, a stationary contact, and a pad. The base includes a bottom plate, a first side plate, and a second side plate, which are sequentially connected to form a U-shaped structure. The bottom plate has a first limiting portion and a second limiting portion. The stationary contact is disposed on the bottom plate and includes a terminal and a contact end positioned opposite each other. The side of the terminal facing the bottom plate has a first limiting portion. The pad is fixedly disposed on the side of the contact end facing the bottom plate and has a second limiting portion. The first limiting portion cooperates with the first limiting portion to limit the stationary contact in a first direction, and the second limiting portion cooperates with the second limiting portion to limit the stationary contact in a second direction. The first direction is the arrangement direction of the terminal and the contact end, and the second direction is the arrangement direction of the first side plate and the second side plate.
[0006] With the above solution, when the stationary contact is mounted on the base plate, the first limiting part cooperates with the first restricting part to limit the terminal of the stationary contact in the first direction, that is, the arrangement direction of the terminal and the contact end. This reduces the possibility of the stationary contact moving towards the moving contact or away from the moving contact when the terminal fixing becomes loose, thereby reducing the possibility of the contact end moving towards the moving contact or away from the moving contact. When the stationary contact is mounted on the base plate, the second limiting part cooperates with the second restricting part to limit the contact end of the stationary contact in the second direction, that is, the arrangement direction of the first side plate and the second side plate. This reduces the possibility of the contact end wobbling between the first side plate and the second side plate. The stationary contact is mounted on the contact end. When the contact end is limited in both the first and second directions, the possibility of the stationary contact moving within the base is reduced. This reduces the likelihood of misalignment between the moving and stationary contacts, thereby improving the reliability of the conduction between the moving and stationary contacts and ultimately enhancing the overall reliability of the contact system. Furthermore, when the possibility of misalignment between the moving and stationary contacts is reduced, it is no longer necessary to increase the area of the stationary and / or moving contacts to ensure reliable contact, thus saving on circuit breaker production costs.
[0007] In one possible design, the first limiting part is a groove structure provided on the side of the base plate facing the stationary contact. The first limiting part is a protruding structure provided on the terminal. The protruding structure is positioned opposite the groove structure and is located within the groove structure.
[0008] With the above solution, the first limiting part is a groove structure, and the first restricting part is a protrusion structure. The groove structure and the protrusion structure cooperate to limit the stationary contact of the base plate, reducing the possibility of the stationary contact moving in the first direction within the base. Furthermore, the groove structure can also guide the protrusion structure, thus simplifying the installation of the stationary contact.
[0009] In one possible design, the first limiting part is a protruding structure provided on the side of the base plate facing the stationary contact. The first limiting part is a grooved structure provided on the terminal. The protruding structure and the grooved structure are positioned opposite each other, with the protruding structure located within the grooved structure.
[0010] With the above solution, the first limiting part is a protruding structure, and the first restricting part is a groove structure. The groove structure cooperates with the protruding structure to limit the stationary contact of the base plate, reducing the possibility of the stationary contact moving along the first direction within the base. Furthermore, the protruding structure can also guide the groove structure, thus simplifying the installation of the stationary contact.
[0011] In one possible design, the second limiting part is a limiting block disposed on the side of the base plate facing the stationary contact. The second limiting part is a limiting groove formed on the pad. The limiting block is located in the limiting groove, and in a second direction, the side wall of the limiting block contacts the groove wall of the limiting groove.
[0012] With the above scheme, the limiting block is located within the limiting groove, and the side wall of the limiting block in the second direction contacts the groove wall in the second direction. This allows the limiting block and the limiting groove to cooperate, enabling the base plate to limit the pad. Since the pad is fixedly connected to the contact end, when the base plate limits the pad, the contact end is also limited by the base plate. Thus, combined with the first limiting part and the first restricted part, the stationary contact can be limited by the base plate in both the first and second directions within the base. This reduces the possibility of movement of the stationary contact within the base, thereby reducing the possibility of misalignment between the moving and stationary contacts, improving the reliability of the connection between the moving and stationary contacts, and ultimately improving the reliability of the contact system.
[0013] In one possible design, the second limiting part is a limiting block disposed on the side of the base plate facing the stationary contact. The second limiting part is a claw structure disposed on the pad, the claw structure including a first claw and a second claw, the first claw and the second claw being disposed on two side walls of the pad respectively along a second direction. The first claw contacts one side wall of the limiting block in the second direction, and the second claw contacts the other side wall of the limiting block in the second direction.
[0014] With the above solution, the second limiting part is a claw structure. When the stationary contact is installed on the base plate, the claw structure cooperates with the limiting block, enabling the base plate to limit the contact end. Since the claw structure includes a first claw and a second claw, and the first claw and the second claw respectively contact the two side walls of the limiting block, the possibility of the first claw and the second claw moving relative to the limiting block can be reduced, thereby better limiting the contact end.
[0015] In one possible design, both the first and second claws have hooks at their ends furthest from the pad. A groove is provided on the limiting block opposite the hook, and the hooks engage with the grooves.
[0016] By employing the above-described scheme, hooks are provided at the ends of the first and second claws furthest from the pad. This not only ensures a tighter limiting relationship between the limiting block and the claw structure but also reduces the likelihood of the pad moving away from the base plate along a third direction. Consequently, it reduces the possibility of the contact end moving away from the base plate along a third direction. This results in a better limiting effect of the base plate on the contact end.
[0017] In one possible design, the pad has a positioning post on the side facing the contact end. The contact end has a positioning hole on the side facing the pad, with the positioning post and positioning hole positioned opposite each other. The positioning post is located within the positioning hole.
[0018] The above solution involves setting positioning posts on the pad and positioning holes on the contact end. The positioning posts and holes work together to limit the pad's position, thus reducing the possibility of misalignment between the pad and the stationary contact. Furthermore, the positioning holes also guide the positioning posts, simplifying the installation of the pad.
[0019] In one possible design, the circuit breaker further includes fasteners, a first through hole at the contact end, and a second through hole at the pad, the first and second through holes communicating with each other. The fasteners pass through the first and second through holes to securely connect the pad and the contact end.
[0020] The above solution involves providing a first through hole on the contact end and a second through hole on the pad, ensuring that the first and second through holes are interconnected. Fasteners inserted into the first and second through holes can then fix the pad to the contact end. This fixing method is simple and reliable, further reducing the possibility of positional misalignment between the pad and the stationary contact.
[0021] In one possible design, the contact end has a mounting groove that extends through the contact end along a third direction. The pad has a positioning block, which is partially located within the mounting groove and contacts the groove wall. The third direction refers to the arrangement direction of the stationary contact and the base plate.
[0022] Through the above scheme, the mounting groove can change the current direction at the contact end. Thus, when the moving contact rotates to separate from the stationary contact, the stationary contact can provide a greater repulsive force to the moving contact, allowing the moving contact to separate from the stationary contact more quickly. A positioning block is provided on the pad, which can be located within the mounting groove and contact the groove wall. This allows the mounting groove to limit the pad's movement, further reducing the amplitude of the contact end's swing in the second direction.
[0023] In one possible design, the circuit breaker also includes a moving contact, which is rotatably connected within the circuit breaker. The moving contact includes a moving point, and a stationary contact is located on the side of the contact end away from the base plate, with the stationary contact situated on the rotational trajectory of the moving contact.
[0024] With the above scheme, the moving contact is rotatably connected inside the circuit breaker, enabling the moving contact to drive the moving point to rotate. A stationary contact is provided at the contact end, and the stationary contact is positioned on the rotation trajectory of the moving contact. When the moving contact drives the moving point to rotate, the moving contact can come into contact with the stationary contact. In this way, the current inside the circuit breaker can flow normally, thereby ensuring the normal operation of the circuit breaker. Attached Figure Description
[0025] Figure 1 This is a partial structural assembly diagram of the circuit breaker provided in the embodiments of this application.
[0026] Figure 2 This is a schematic diagram of the structure of the base provided in an embodiment of this application.
[0027] Figure 3 This is a schematic diagram of the structure of the stationary contact provided in an embodiment of this application.
[0028] Figure 4 This is an assembly diagram of the stationary contact and pad provided in an embodiment of this application.
[0029] Figure 5 This is a schematic diagram of the structure of the pad provided in the embodiment of this application when it is in the first configuration form.
[0030] Figure 6 This is a schematic diagram of the structure of the pad provided in the embodiment of this application when it is configured in the second way.
[0031] Figure 7 This is a schematic diagram of the structure of the pad provided in the embodiment of this application when the pad is configured in the second form and an extension section is provided.
[0032] Figure 8 This is a schematic diagram of the structure of the stationary contact when the contact end is bent, as provided in the embodiment of this application.
[0033] Explanation of reference numerals in the attached figures:
[0034] 100, base; 110, bottom plate; 120, first side plate; 130, second side plate; 140, first limiting part; 150, second limiting part;
[0035] 200, stationary contact; 210, terminal; 211, first restricted part; 220, contact end; 221, positioning hole; 222, first through hole; 223, mounting groove; 230, stationary contact;
[0036] 300, pad block; 310, second restricted part; 311, first claw; 312, second claw; 320, positioning post; 330, second through hole; 340, positioning block;
[0037] 400. Fasteners;
[0038] 500. Moving contact; 510. Moving point;
[0039] OX, first direction; OY, second direction; OZ, third direction. Detailed Implementation
[0040] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
[0042] The terms "comprising" and "having," and any variations thereof, used in the specification, claims, and drawings of this application are intended to cover without excluding other meanings. The words "a" or "an" do not exclude the presence of multiples.
[0043] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0044] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.
[0045] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. For example, in the description of this application, terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0046] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned 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.
[0047] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection. A physical connection can be a fixed connection, such as a connection secured by fasteners, such as a connection secured by screws, bolts, or other fasteners; a physical connection can also be a detachable connection, such as a snap-fit or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0048] A circuit breaker is a switching device used in a circuit. Its core function is to automatically disconnect the circuit when faults such as overload, short circuit, or undervoltage occur, preventing damage to electrical equipment or safety accidents such as fires. Circuit breakers combine manual switching and automatic protection functions, making them an indispensable safety component in power systems, industrial equipment, and household electricity.
[0049] Figure 1 This is a partial structural assembly drawing of the circuit breaker provided in an embodiment of this application. (See attached diagram.) Figure 1 As shown, a circuit breaker typically includes a base 100, a moving contact 500, and a stationary contact 200. The moving contact 500 and the stationary contact 200 together form a contact system, which is the core component of the circuit breaker and plays a crucial role in its normal operation and fault protection. The contact system is usually housed within the base 100.
[0050] The stationary contact 200 can be fixedly connected to the base 100, and the moving contact 500 can be rotatably connected to the base 100. The stationary contact 200 includes a stationary contact point 230, which can be fixed to the base 100 along with the stationary contact 200. The moving contact 500 includes a moving contact point 510, which can rotate along with the moving contact 500. The stationary contact point 230 is located on the rotation trajectory of the moving contact point 510, so as to contact or separate from the moving contact point 510.
[0051] With the circuit breaker in Figure 1 Taking the placement shown as an example, when the moving contact 500 drives the moving contact 510 to rotate counterclockwise until it contacts the stationary contact 230, the moving contact 500 and the stationary contact 200 are in contact, and the current in the circuit breaker can flow normally. When the moving contact 500 drives the moving contact 510 to rotate clockwise until it separates from the stationary contact 230, the moving contact 500 and the stationary contact 200 are separated, and the current in the circuit breaker is interrupted.
[0052] As described above, the moving contact 510 and the stationary contact 230 are indispensable parts of the contact system. In the prior art, due to the insecure fixing of the stationary contact 200, the setting position of the stationary contact 230 may shift, resulting in misalignment between the moving contact 510 and the stationary contact 230. When the contact between the moving contact 510 and the stationary contact 230 is misaligned, it will affect the flow of current within the circuit breaker.
[0053] To address the aforementioned problems, this application provides a circuit breaker. To enable those skilled in the art to better understand the solutions presented in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.
[0054] Figure 2 This is a schematic diagram of the structure of the base provided in an embodiment of this application. Figure 2 As shown, this application provides a circuit breaker. The circuit breaker includes a base 100. The base 100 includes a base plate 110, a first side plate 120 and a second side plate 130, which are sequentially connected to form a U-shaped structure. The base plate 110 is provided with a first limiting part 140 and a second limiting part 150.
[0055] The base plate 110, the first side plate 120, and the second side plate 130 can all be plate-shaped structures. The first side plate 120 and the second side plate 130 are arranged opposite to each other and spaced apart, with the base plate 110 located between the first side plate 120 and the second side plate 130. In this way, the first side plate 120, the base plate 110, and the second side plate 130 can be connected sequentially, allowing the base 100 to form a U-shaped structure.
[0056] In some possible embodiments, multiple partitions may be provided between the first side plate 120 and the second side plate 130. The multiple partitions can divide the space between the first side plate 120 and the second side plate 130 into several independent installation spaces, and a set of contact systems can be provided in each installation space.
[0057] The first limiting part 140 and the second limiting part 150 can both be limiting structures provided on the base 100, and the first limiting part 140 and the second limiting part 150 can both be provided on the base plate 110.
[0058] Figure 3 This is a schematic diagram of the structure of the stationary contact provided in an embodiment of this application. Figure 1 as well as Figure 3 As shown, the circuit breaker also includes a stationary contact 200, which is disposed on the base plate 110. The stationary contact 200 includes a terminal 210 and a contact end 220 that are positioned opposite each other. The terminal 210 has a first restricted part 211 on the side facing the base plate 110.
[0059] The stationary contact 200 can be in the shape of a long strip. The two ends of the stationary contact 200 can be a wiring terminal 210 and a contact terminal 220, respectively. The wiring terminal 210 can be used to make electrical connections with external wires, and the side of the contact terminal 220 facing away from the base plate 110 can be used to set the stationary contact 230.
[0060] Since the first limiting part 140 is provided on the base plate 110, the first limiting part 211 can be used in conjunction with the first limiting part 140. Therefore, the first limiting part 211 can be provided on the side of the terminal 210 facing the base plate 110.
[0061] Figure 4 This is an assembly diagram of the stationary contact and pad provided in an embodiment of this application. Figure 5 This is a structural diagram illustrating the first configuration of the pad provided in this application embodiment. Figure 4 as well as Figure 5 As shown, the circuit breaker also includes a pad 300, which is fixedly disposed on the side of the contact end 220 facing the base plate 110, and the pad 300 is provided with a second restricted part 310.
[0062] The pad 300 can be a block-shaped structure or a plate-shaped structure provided on the contact end 220. Since the pad 300 is provided with a second limiting part 310, the second limiting part 310 can be used in conjunction with the second limiting part 150. The second limiting part 150 is provided on the base plate 110, so the pad 300 can be provided on the side of the contact end 220 facing the base plate 110.
[0063] like Figures 1 to 5As shown, the first limiting part 140 cooperates with the first restricting part 211 to limit the stationary contact 200 in the first direction OX, and the second limiting part 150 cooperates with the second restricting part 310 to limit the stationary contact 200 in the second direction OY. Here, the first direction OX is the arrangement direction of the terminal 210 and the contact end 220, and the second direction OY is the arrangement direction of the first side plate 120 and the second side plate 130.
[0064] In summary, when the stationary contact 200 is mounted on the base plate 110, the first limiting part 140 cooperates with the first restricting part 211 to limit the terminal 210 of the stationary contact 200 in the first direction OX, that is, in the arrangement direction of the terminal 210 and the contact end 220. This reduces the likelihood of the stationary contact 200 moving towards the moving contact 500 or away from the moving contact 500 when the fixing of the terminal 210 becomes loose. Consequently, it also reduces the likelihood of the contact end 220 moving towards the moving contact 500 or away from the moving contact 500.
[0065] When the stationary contact 200 is mounted on the base plate 110, the second limiting part 150 cooperates with the second restricting part 310 to limit the contact end 220 of the stationary contact 200 in the second direction OY, that is, in the arrangement direction of the first side plate 120 and the second side plate 130. In this way, the possibility of the contact end 220 wobbling between the first side plate 120 and the second side plate 130 can be reduced.
[0066] The stationary contact 230 is mounted on the contact end 220. When the contact end 220 is limited in both the first direction OX and the second direction OY, the possibility of the stationary contact 230 moving within the base 100 can be reduced. This reduces the possibility of misalignment between the moving contact 510 and the stationary contact 230, thereby improving the reliability of the conduction between the moving contact 500 and the stationary contact 200, and consequently improving the reliability of the contact system. Furthermore, when the possibility of misalignment between the moving contact 510 and the stationary contact 230 is reduced, it is no longer necessary to increase the area of the stationary contact 230 and / or the moving contact 510 to ensure reliable contact, thus saving on the circuit breaker's production costs.
[0067] The first limiting part and the first restricted part mentioned in this application will be described in detail below with reference to the accompanying drawings.
[0068] Please continue to refer to Figure 2 as well as Figure 3As shown, the first limiting part 140 is a groove structure provided on the side of the base plate 110 facing the stationary contact 200. The first limiting part 211 is a protruding structure provided on the terminal 210. The protruding structure is positioned opposite to the groove structure and is located within the groove structure.
[0069] The groove structure can be a blind groove structure provided on the base plate 110, and the groove opening can face the terminal 210. The groove structure can be a square groove, a circular groove, or a triangular groove, etc. The groove structure can be integrally formed with the base plate 110, or it can be set on the base plate 110 by grooving or engraving after the base plate 110 is formed.
[0070] The raised structure can be a block-shaped structure provided on the side of the terminal 210 facing the base plate 110. The raised structure can be a quadrangular prism, a cylinder, or a triangular prism, etc. The raised structure can be integrally formed with the stationary contact 200, or the raised structure can be provided on the terminal 210 of the stationary contact 200 by means of adhesion after the stationary contact 200 is formed.
[0071] The length of the protruding structure can be the same as the depth of the groove structure, or the length of the protruding structure can be less than the depth of the groove structure. In this way, when the protruding structure is located inside the groove structure, the contact end 220 can contact the base plate 110, thereby making the installation of the stationary contact 200 more stable.
[0072] When the protruding structure is located within the grooved structure, the sidewall of the protruding structure can contact the groove wall of the grooved structure. This reduces the possibility of the protruding structure wobbling within the grooved structure, thereby improving the limiting effect of the first limiting part 140 on the first limiting part 211, and further improving the limiting effect of the base plate 110 on the stationary contact 200.
[0073] In summary, the first limiting part 140 is a groove structure, and the first limiting part 211 is a protrusion structure. The groove structure and the protrusion structure cooperate to limit the stationary contact 200 within the base 100, reducing the possibility of the stationary contact 200 moving along the first direction OX. Furthermore, the groove structure also guides the protrusion structure, thus simplifying the installation of the stationary contact 200.
[0074] In some possible designs, the first limiting part 140 can be a protruding structure provided on the side of the base plate 110 facing the stationary contact 200. The first limiting part 211 can be a groove structure provided on the terminal 210.
[0075] The raised and groove structures have been described in detail above and will not be repeated here.
[0076] As shown in the above scheme, the first limiting part 140 is a protruding structure, and the first limiting part 211 is a groove structure. The groove structure cooperates with the protruding structure, enabling the base plate 110 to limit the stationary contact 200, reducing the possibility of the stationary contact 200 moving along the first direction OX within the base 100. Furthermore, the protruding structure can also guide the groove structure, thus simplifying the installation of the stationary contact 200.
[0077] like Figures 3 to 5 As shown, a positioning post 320 is provided on the side of the pad 300 facing the contact end 220. A positioning hole 221 is provided on the side of the contact end 220 facing the pad 300, and the positioning post 320 is positioned opposite to the positioning hole 221. The positioning post 320 is located inside the positioning hole 221.
[0078] The positioning post 320 can be a columnar protrusion structure provided on the side of the pad 300 facing the contact end 220. The positioning post 320 can be cylindrical or prismatic, etc. The positioning hole 221 can be a blind groove structure provided on the side of the contact end 220 facing the pad 300, or the positioning hole 221 can be a through hole structure provided on the contact end 220. When the pad 300 is installed on the stationary contact 200, the positioning post 320 can be located in the positioning hole 221.
[0079] The length of the positioning post 320 can be the same as the depth of the positioning hole 221. In this way, when the positioning hole 221 is a blind hole, the problem of gaps between the pad 300 and the stationary contact 200 caused by the positioning post 320 being too long can be reduced.
[0080] Because the pad 300 is located on the side of the contact end 220 facing the base plate 110, when the positioning hole 221 is a through hole structure, the length of the positioning post 320 is the same as the depth of the positioning hole 221. This can reduce the problem that the end of the positioning post 320 away from the pad 300 protrudes from the contact end 220 due to the positioning post 320 being too long, thus affecting the use of the contact system.
[0081] In summary, by providing a positioning post 320 on the pad 300 and a positioning hole 221 on the contact end 220, the positioning post 320 and the positioning hole 221 can cooperate to limit the position of the pad 300, thereby reducing the problem of positional misalignment between the pad 300 and the stationary contact 200. Furthermore, the positioning hole 221 can also provide a guide for the positioning post 320, making the installation of the pad 300 simpler.
[0082] Please continue to refer to Figures 3 to 5As shown, the circuit breaker also includes a fastener 400. The contact end 220 has a first through hole 222, and the pad 300 has a second through hole 330. The first through hole 222 and the second through hole 330 communicate with each other. The fastener 400 passes through the first through hole 222 and the second through hole 330 to fix the pad 300 and the contact end 220.
[0083] In some possible embodiments, the first through hole 222 can be a through hole structure provided on the contact end 220. The first through hole 222 can be integrally formed with the stationary contact 200. Alternatively, the first through hole 222 can be provided on the contact end 220 by methods such as grooving or engraving after the stationary contact 200 is formed.
[0084] The second through hole 330 can be a through hole structure provided on the pad 300. The second through hole 330 can be integrally formed with the pad 300, or the second through hole 330 can be provided on the pad 300 by grooving or carving after the pad 300 is formed.
[0085] When the positioning pin 320 is located in the positioning hole 221, the pad 300 contacts the contact end 220. At this time, the first through hole 222 communicates with the second through hole 330.
[0086] In this case, the fastener 400 can be a rivet, which can be inserted into the first through hole 222 and the second through hole 330 to rivet the pad 300 to the stationary contact 200.
[0087] In some other possible embodiments, the first through hole 222 can be a threaded hole provided on the contact end 220, and the second through hole 330 can be a through hole structure provided on the pad 300.
[0088] In this case, the fastener 400 can be a bolt. When the positioning pin 320 is located in the positioning hole 221, the pad 300 contacts the contact end 220. At this time, the first through hole 222 communicates with the second through hole 330. The fastener 400 can pass through the second through hole 330 and be threadedly connected to the first through hole 222.
[0089] In summary, a first through hole 222 is provided on the contact end 220, and a second through hole 330 is provided on the pad 300, with the first through hole 222 and the second through hole 330 communicating with each other. A fastener 400 inserted into the first through hole 222 and the second through hole 330 can fix the pad 300 to the contact end 220. This fixing method is simple and relatively reliable, further reducing the possibility of positional misalignment between the pad 300 and the stationary contact 200.
[0090] The second limiting part and the second restricted part mentioned in this application will be described in detail below with reference to the accompanying drawings.
[0091] like Figure 1 , Figure 2 , Figure 4 as well as Figure 5 As shown, the second limiting part 150 can be a limiting block provided on the side of the base plate 110 facing the stationary contact 200. The second limiting part 310 is a limiting groove opened on the pad 300. The limiting block is located in the limiting groove, and in the second direction OY, the side wall of the limiting block is in contact with the groove wall of the limiting groove.
[0092] The limiting block can be a block-shaped protrusion structure provided on the side of the base plate 110 facing the stationary contact 200, and the limiting block can be prism-shaped.
[0093] The limiting groove can be a through groove structure provided on the pad 300, or it can be a blind groove structure provided on the side of the pad 300 facing the base plate 110. When the limiting groove is a through groove structure, it can be opened on the pad 300 in the opposite direction of the first direction OX, and it also penetrates the pad 300 in the third direction OZ. Alternatively, the limiting groove can penetrate the pad 300 in the third direction OZ. When the limiting groove is a blind groove structure, it can be opened on the side of the pad facing the base plate 110 in the opposite direction of the third direction OZ. The third direction OZ can be the arrangement direction of the stationary contact 200 and the base plate 110.
[0094] The limiting groove can be a rectangular groove. In this way, when the limiting block is located in the limiting groove and the side wall of the limiting block in the second direction OY contacts the groove wall of the limiting groove in the second direction OY, the problem of the contact end 220 swinging along the second direction OY with the limiting block as the axis can be reduced.
[0095] When the stationary contact 200 is mounted on the base plate 110, the terminal 210 is limited to the base plate 110 by the first limiting part 140 and the first restricting part 211, and the contact end 220 is fixedly provided with a pad 300, which is limited to the base plate 110 by the second limiting part 150 and the second restricting part 310. In this way, the stationary contact 200 can be limited by the base plate 110 in both the first direction OX and the second direction OY within the base 100.
[0096] In summary, the limiting block is located within the limiting groove, and the side wall of the limiting block in the second direction OY contacts the groove wall of the limiting groove in the second direction OY. Thus, the limiting block and the limiting groove cooperate to limit the pad 300 by the base plate 110. Since the pad 300 is fixedly connected to the contact end 220, when the base plate 110 limits the pad 300, the contact end 220 can also be limited by the base plate 110. Therefore, combined with the first limiting part 140 and the first limiting part 211, the stationary contact 200 can be limited by the base plate 110 along both the first direction OX and the second direction OY within the base 100. This reduces the possibility of the stationary contact 230 moving within the base 100, thereby reducing the possibility of misalignment between the moving contact 510 and the stationary contact 230. This improves the reliability of the connection between the moving contact 500 and the stationary contact 200, and consequently improves the reliability of the contact system.
[0097] Figure 6 This is a schematic diagram illustrating the structure of the pad provided in the embodiments of this application when it is in the second configuration. In some possible embodiments, such as... Figure 2 , Figure 4 as well as Figure 6 As shown, the second limiting part 150 can be a limiting block provided on the side of the base plate 110 facing the stationary contact 200. The second limiting part 310 is a claw structure provided on the pad 300. The claw structure includes a first claw 311 and a second claw 312, which are respectively provided on two side walls of the pad 300 along the second direction OY. The first claw 311 contacts one side wall of the limiting block in the second direction OY, and the second claw 312 contacts the other side wall of the limiting block in the second direction OY.
[0098] The first claw 311 can be a plate-like structure disposed on one side wall of the pad 300, and the second claw 312 can be a plate-like structure disposed on the other side wall of the pad 300. Both the first claw 311 and the second claw 312 can extend towards the base plate 110. The side wall of the pad 300 where the first claw 311 and the side wall of the pad 300 where the second claw 312 are disposed can be arranged along the second direction OY. The first claw 311 and the second claw 312 can be symmetrically arranged about the pad 300 as an axis of symmetry. Thus, the first claw 311 and the second claw 312 can form a locking structure.
[0099] When the stationary contact 200 is mounted on the base plate 110, the first claw 311 contacts one side wall of the limiting block, and the second claw 312 contacts the other side wall of the limiting block. The first claw 311 and the second claw 312 will not move relative to the limiting block. In this way, the base plate 110 can be used to limit the pad 300. Since the pad 300 is fixedly connected to the contact end 220, when the base plate 110 limits the pad 300, the contact end 220 can also be limited by the base plate 110.
[0100] In summary, the second limiting part 310 is a claw structure. When the stationary contact 200 is mounted on the base plate 110, the claw structure cooperates with the limiting block, enabling the base plate 110 to limit the contact end 220. Since the claw structure includes a first claw 311 and a second claw 312, and the first claw 311 and the second claw 312 respectively contact the two side walls of the limiting block, the possibility of the first claw 311 and the second claw 312 moving relative to the limiting block can be reduced, thereby better limiting the contact end 220.
[0101] Furthermore, both the first claw 311 and the second claw 312 are provided with hooks at the ends away from the pad block 300. The limiting block is provided with a groove at the position opposite to the hook, and the hook hooks into the groove.
[0102] A slot is provided on the side wall where the limiting block contacts the first claw 311, and a slot is also provided on the side wall where the limiting block contacts the second claw 312.
[0103] With the above configuration, hooks are provided at the ends of the first claw 311 and the second claw 312 away from the pad 300. This not only makes the limiting relationship between the limiting block and the claw structure tighter, but also reduces the possibility of the pad 300 moving away from the base plate 110 along the third direction OZ, thereby reducing the possibility of the contact end 220 moving away from the base plate 110 along the third direction OZ. Thus, the limiting effect of the base plate 110 on the contact end 220 is better.
[0104] Please continue to refer to Figure 1 , Figure 2 , Figure 4 as well as Figure 6 As shown, in some possible embodiments, the contact end 220 is provided with a mounting groove 223, which extends through the contact end 220 in a third direction OZ. The pad 300 is provided with a positioning block 340, which is partially located within the mounting groove 223 and contacts the groove wall of the mounting groove 223.
[0105] The mounting groove 223 can be a through groove structure opened along the third direction OZ on the contact end 220. The positioning block 340 can be a protrusion structure provided on the pad 300. The positioning block 340 can be provided on the side wall of the pad 300 in the second direction OY, or the positioning block 340 can be provided on the side wall of the pad 300 facing the stationary contact 200. The positioning block 340 can extend in a direction away from the base plate 110. There can be two positioning blocks 340, and the two positioning blocks 340 can be symmetrically arranged about the pad 300 as an axis of symmetry.
[0106] The length of the positioning block 340 can be the same as the depth of the mounting groove 223, or the length of the positioning block 340 can be less than the depth of the mounting groove 223. Since the mounting groove 223 can be a through-slot structure provided on the contact end 220, it can be concluded that the length of the positioning block 340 can be the same as the thickness of the stationary contact 200, or the length of the positioning block 340 can be less than the thickness of the stationary contact 200. This design can reduce the problem of the end of the positioning block 340 away from the pad 300 protruding from the stationary contact 200 due to excessive length, thus affecting the use of the contact system.
[0107] When the positioning pin 320 is located in the positioning hole 221, the positioning block 340 can be located in the mounting groove 223, and the positioning block 340 can contact the groove wall of the mounting groove 223.
[0108] In summary, the mounting groove 223 can change the current direction of the contact end 220. Thus, when the moving contact 500 drives the moving contact 510 to rotate and separate from the stationary contact 230, the stationary contact 200 can provide a greater repulsive force to the moving contact 500, allowing the moving contact 500 to separate from the stationary contact 200 more quickly. A positioning block 340 is provided on the pad 300. The positioning block 340 can be located within the mounting groove 223 and can contact the groove wall of the mounting groove 223. This allows the mounting groove 223 to limit the movement of the pad 300, further reducing the amplitude of the contact end 220's swing in the second direction OY.
[0109] Figure 7 This is a schematic diagram illustrating the structure of the pad provided in this application embodiment when the pad is configured in the second manner, with an extended section. For example... Figure 1 , Figure 3 as well as Figure 7 As shown, the pad 300 may further include an extension section, which can be an extension plate structure located at the end of the pad 300 furthest from the terminal 210. The second through hole 330 may be provided on the extension section.
[0110] Figure 8 This is a schematic diagram of the structure of the stationary contact when the contact end is bent, as provided in an embodiment of this application. Figure 8As shown, in some possible embodiments, in order to reduce the time the arc stays between the moving contact 510 and the stationary contact 230 when the moving contact 500 separates from the stationary contact 200, the contact end 220 of the stationary contact 200 is bent toward the base plate 110.
[0111] When the pad 300 is provided with an extension section, the extension section can also be bent toward the base plate 110. This makes the pad 300 more compatible with the bent contact end 220, thereby increasing the application scenarios of the pad 300.
[0112] The stationary contact 200 mentioned in this application can be... Figure 3 or Figure 8 The structure shown can be adapted to different structures of the pad 300 depending on the structure of the stationary contact 200, so that the pad 300 can be matched with the stationary contact 200.
Claims
1. A circuit breaker, characterized in that, include: The base includes a bottom plate, a first side plate, and a second side plate. The first side plate, the bottom plate, and the second side plate are connected in sequence to form a U-shaped structure. The bottom plate is provided with a first limiting part and a second limiting part. A stationary contact is disposed on the base plate. The stationary contact includes a terminal block and a contact end that are positioned opposite each other. The terminal block has a first limiting part on the side facing the base plate. A pad is fixedly disposed on the side of the contact end facing the base plate, and the pad is provided with a second restrictive part; The first limiting part cooperates with the first restricting part to limit the stationary contact in a first direction, and the second limiting part cooperates with the second restricting part to limit the stationary contact in a second direction. Wherein, the first direction is the arrangement direction of the wiring terminal and the contact terminal, and the second direction is the arrangement direction of the first side plate and the second side plate.
2. The circuit breaker according to claim 1, characterized in that, The first limiting part is a groove structure provided on the side of the base plate facing the stationary contact; The first restricted part is a protruding structure provided on the terminal; The protruding structure is positioned opposite the groove structure, and the protruding structure is located within the groove structure.
3. The circuit breaker according to claim 1, characterized in that, The first limiting part is a protruding structure provided on the side of the base plate facing the stationary contact; The first restricted part is a groove structure provided at the terminal; The protruding structure is positioned opposite the groove structure, and the protruding structure is located within the groove structure.
4. The circuit breaker according to claim 1, characterized in that, The second limiting part is a limiting block provided on the side of the base plate facing the stationary contact; The second restricted part is a limiting groove opened on the pad; The limiting block is located within the limiting groove, and in the second direction, the sidewall of the limiting block is in contact with the groove wall of the limiting groove.
5. The circuit breaker according to claim 1, characterized in that, The second limiting part is a limiting block provided on the side of the base plate facing the stationary contact; The second restricted part is a claw structure provided on the pad block. The claw structure includes a first claw and a second claw, which are respectively provided on two side walls of the pad block along the second direction. The first claw contacts one sidewall of the limiting block in the second direction, and the second claw contacts the other sidewall of the limiting block in the second direction.
6. The circuit breaker according to claim 5, characterized in that, Both the first claw and the second claw have hooks at the ends furthest from the pad; The limiting block is provided with a slot at the position opposite to the hook, and the hook is hooked to the slot.
7. The circuit breaker according to any one of claims 1-6, characterized in that, The pad has a positioning post on the side facing the contact end; The contact end is provided with a positioning hole on the side facing the pad, and the positioning post is positioned opposite to the positioning hole; The positioning post is located inside the positioning hole.
8. The circuit breaker according to any one of claims 1-6, characterized in that, It also includes fasteners, the contact end is provided with a first through hole, the pad is provided with a second through hole, and the first through hole communicates with the second through hole; The fastener passes through the first through hole and the second through hole to fix the pad block and the contact end.
9. The circuit breaker according to any one of claims 1-6, characterized in that, The contact end is provided with a mounting groove, which extends through the contact end in a third direction; The pad is provided with a positioning block, the positioning block is partially located in the mounting groove, and the positioning block is in contact with the groove wall of the mounting groove; Wherein, the third direction refers to the arrangement direction of the stationary contact and the base plate.
10. The circuit breaker according to claim 1, characterized in that, It also includes a moving contact, which is rotatably connected inside the circuit breaker; The moving contact includes a moving contact point, and a stationary contact point is provided on the side of the contact end away from the base plate. The stationary contact point is located on the rotation trajectory of the moving contact point.