Contact structure, movable contact, stationary contact and circuit breaker

Abstract

The application relates to the technical field of circuit breakers, in particular to a contact structure, a moving contact, a static contact and a circuit breaker. The contact structure comprises a body and a silver point. The body comprises a mounting surface arranged along a first direction. The mounting surface is provided with a clamping groove with an opening. The silver point comprises a contact structure and a clamping structure, and the contact structure is connected with the clamping structure. The clamping structure is clamped in the clamping groove, so that at least part of the contact structure is located outside the clamping groove and protrudes from the mounting surface. The clamping groove comprises a groove bottom and a first step structure oppositely arranged along the first direction. The first step structure comprises a first surface and a second surface. The first surface and the groove bottom abut against the clamping structure. The second surface abuts against the contact structure. The clamping groove comprises two groove walls oppositely arranged along a second direction. The two groove walls abut against the clamping structure. The application effectively solves the problem of unstable connection between the silver point and the body, and significantly improves the reliability and long-term stability of the contact structure in a dynamic working environment.

Description

Technical Field

[0001] This application relates to the field of circuit breaker technology, and in particular to a contact structure, moving contact, stationary contact, and circuit breaker. Background Technology

[0002] A circuit breaker is an electrical device that controls the flow of current. It is connected to a circuit system to protect it from short circuits or overloads. A circuit breaker consists of a moving contact and a stationary contact. The moving contact rotates within the circuit breaker, and the stationary contact is positioned along the rotation path of the moving contact, allowing the moving and stationary contacts to connect or disconnect, thereby controlling the flow of current within the circuit breaker. Both the moving and stationary contacts may include a body and a silver contact point. The silver contact point reduces the resistance between the moving and stationary contacts, increasing the current flow rate within the circuit breaker.

[0003] In related technologies, silver dots are welded to the body, and the stability of the connection between the silver dots and the body depends on the precision of the welding process. If incomplete welding or cracks occur during the welding process, the connection between the silver dots and the body may fail, thus affecting the normal flow of current in the circuit breaker and consequently impacting the basic functions of the circuit breaker. Utility Model Content

[0004] This application provides a contact structure, a moving contact, a stationary contact, and a circuit breaker to solve the problem of unstable connection between the silver contact and the body due to welding. It achieves long-term stability of the connection between the silver contact and the body, thereby ensuring the stability of current flow in the circuit breaker and ensuring the long-term effectiveness of the basic functions of the circuit breaker.

[0005] In a first aspect, this application provides a contact structure for a circuit breaker, comprising: a body and a silver dot. The body includes a mounting surface disposed along a first direction. A snap-fit ​​groove is provided on the mounting surface, the snap-fit ​​groove having an opening on the mounting surface. The silver dot includes a contact structure and a snap-fit ​​structure, the contact structure being connected to the snap-fit ​​structure. The snap-fit ​​structure snaps into the snap-fit ​​groove, and at least a portion of the contact structure is located outside the snap-fit ​​groove and protrudes from the mounting surface. The snap-fit ​​groove includes a groove bottom and a first step structure disposed opposite each other along the first direction. The first step structure includes a first surface facing the groove bottom and a second surface facing the opening. The first surface and the groove bottom abut against the snap-fit ​​structure along the first direction. The second surface abuts against the contact structure along the first direction. The snap-fit ​​groove includes two groove walls disposed opposite each other along a second direction, wherein the second direction is perpendicular to the first direction. The two groove walls abut against the snap-fit ​​structure along the second direction.

[0006] According to the description of the first aspect embodiment, this application uses the bottom of the snap-fit ​​groove and the first surface of the first step surface to abut against the snap-fit ​​structure along the first direction to achieve initial positioning of the silver point in the first direction. The groove wall of the snap-fit ​​groove abuts against the snap-fit ​​structure to achieve positioning of the silver point in the second direction. Since the first direction is perpendicular to the second direction, the groove bottom, the first surface, and the groove wall work together on the snap-fit ​​structure, using a mechanical snap-fit ​​method to replace the traditional welding process to position the spatial freedom of the silver point, avoiding the risk of connection failure caused by incomplete welding or cracks. In addition, the second surface of the first step surface abuts against the contact structure along the first direction, so that the contact structure protrudes stably from the mounting surface through the snap-fit ​​groove opening, maintaining its effective contact area with the contact head, thereby ensuring the normal flow of current in the circuit breaker. This technical solution effectively solves the problem of unstable connection between the silver point and the body, and significantly improves the reliability and long-term stability of the contact structure in a dynamic working environment.

[0007] In one possible design, the snap-fit ​​structure enters the snap-fit ​​slot along a third direction. This third direction is perpendicular to both the first and second directions. The snap-fit ​​structure and the snap-fit ​​slot are connected by an interference fit.

[0008] Based on the description of the above embodiments, the snap-fit ​​structure enters the snap-fit ​​groove along the third direction, and the snap-fit ​​structure and the snap-fit ​​groove are interference-fitted, so that the silver point is firmly connected to the body, preventing the silver point from coming out of the snap-fit ​​groove in the third direction. The friction between the snap-fit ​​structure and the snap-fit ​​groove achieves the limitation of the silver point in the third direction. Since the third direction is perpendicular to the first direction and the second direction, the aforementioned friction, groove bottom, first surface and groove wall work together on the snap-fit ​​structure to limit the six spatial degrees of freedom of the silver point, ensuring the stability of the contact structure and the reliability of current conduction.

[0009] In one possible design, the dimension of the contact structure in the first direction is larger than the dimension of the snap-fit ​​structure in the first direction. The dimension of the contact structure in the second direction is also larger than the dimension of the snap-fit ​​structure in the second direction.

[0010] Based on the description of the above embodiments, the size of the contact structure in the first / second direction is larger than that of the snap-fit ​​structure in the first / second direction. This promotes stable contact between the contact structure and the mating contacts, thereby ensuring the reliability of current conduction. Furthermore, it reduces the space occupied by the snap-fit ​​structure in the snap-fit ​​slot, thus reducing the volume of the snap-fit ​​slot and preventing an excessively large slot from affecting the structural strength of the main body, thereby improving the long-term service life of the contact structure.

[0011] In one possible design, a connecting structure is provided between the contact structure and the snap-fit ​​structure. The dimension of the first step in the first direction is equal to the dimension of the connecting structure in the first direction. The dimension of the snap-fit ​​structure in the first direction is greater than the dimension of the connecting structure in the first direction. The dimension of the snap-fit ​​structure in the second direction is greater than the dimension of the connecting structure in the second direction.

[0012] Based on the description of the above embodiments, the connecting structure between the contact structure and the snap-fit ​​structure can effectively disperse the stress borne by the contact structure and the snap-fit ​​structure during the snap-fit ​​process. Meanwhile, the design of the dimensions of the connecting structure in the first and second directions in this application can reduce the volume of the snap-fit ​​groove while ensuring the reliability of the connection between the silver dot and the body. This avoids the snap-fit ​​groove on the body being too large, which would affect the structural strength of the body itself, thereby improving the long-term service life of the contact structure.

[0013] In one possible design, a first step divides the snap-fit ​​groove along a first direction into a first receiving groove and a second receiving groove. An opening is located in the first receiving groove. The bottom of the groove is located in the second receiving groove. The first receiving groove is adapted to the contact structure to accommodate at least a portion of the contact structure. The second receiving groove is adapted to the snap-fit ​​structure to accommodate the snap-fit ​​structure.

[0014] Based on the description of the above embodiments, the first step divides the snap-fit ​​groove along the first direction into a first receiving groove adapted to the contact structure and a second receiving groove adapted to the snap-fit ​​structure, so that contact structures and snap-fit ​​structures of different sizes can be tightly snapped into the different receiving grooves divided by the snap-fit ​​groove, so as to achieve a stable connection between the silver point and the body.

[0015] In one possible design, the contact structure includes two side surfaces arranged along a second direction. Each of the two side surfaces has a protruding structure. The first receiving groove includes an inner wall that abuts against the two side surfaces. Two insertion slots are formed on the inner wall, corresponding to the two protruding structures respectively. The protruding structures are inserted into the insertion slots.

[0016] Based on the description of the above embodiments, the insertion and engagement of the protrusion structure and the insertion groove can eliminate the displacement space of the contact structure in the first receiving groove, thereby effectively suppressing the shaking, movement or rotation that may occur due to the gap between the contact structure and the first receiving groove, and improving the installation accuracy and positional stability of the silver dot on the body.

[0017] In one possible design, the snap-fit ​​structure can be a cuboid block. Alternatively, the snap-fit ​​structure can be a spherical block.

[0018] Based on the description of the above embodiments, when the snap-fit ​​structure is a cuboid block, it has the advantage of stable connection. When the snap-fit ​​structure is a spherical block, it has the advantage of low contact friction, which can improve the service life of the structure. Those skilled in the art can select the appropriate structure according to actual needs.

[0019] Secondly, this application provides a stationary contact, including the contact structure described in any of the above embodiments.

[0020] Thirdly, this application provides a moving contact, including the contact structure described in any of the above embodiments.

[0021] Fourthly, this application provides a circuit breaker, characterized in that it includes the stationary contact described in the second aspect embodiment and / or the moving contact described in the third aspect embodiment.

[0022] The advantages of the stationary contact provided in the second aspect, the moving contact provided in the third aspect, and the circuit breaker provided in the fourth aspect can be found in the first aspect and the advantages of various possible implementations of the first aspect, and will not be repeated here. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of a contact structure in an embodiment of this application.

[0025] Figure 2 for Figure 1 An enlarged view of section A.

[0026] Figure 3 This is a schematic diagram of the structure of an entity in an embodiment of this application.

[0027] Figure 4 for Figure 3 A magnified view of section B.

[0028] Figure 5 for Figure 3 A diagram from another perspective.

[0029] Figure 6 This is a schematic diagram of the structure of a silver dot in an embodiment of this application.

[0030] Explanation of reference numerals in the attached figures: 100-Contact structure; 1-Body; 11-Mounting surface; 11a-Opening; 12-Snap-fit ​​groove; 121-First receiving groove; 122-Second receiving groove; 13-First step structure; 131-First surface; 132-Second surface; 14-Groove bottom; 15-Groove wall; 16-Plug-in groove; 2-Silver dot; 21-Contact structure; 22-Snap-fit ​​structure; 23-Connection structure; 24-Protrusion structure; X-First direction; Y-Second direction; Z-Third direction. Detailed Implementation

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] Furthermore, the descriptions of directions such as the X direction, Y direction, and Z direction used to explain the operation and construction of the components in this embodiment are not absolute but relative. Although these directions are appropriate when the components are in the positions shown in the figure, they should be interpreted differently when these positions change to correspond to the changes.

[0038] 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.

[0039] In the description of this application, unless otherwise stated, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more (including two groups).

[0040] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, "connection" or "linkage" in mechanical structures can refer to a physical connection, such as a fixed connection, for example, a connection fixed by fasteners, such as a connection fixed 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. In circuit structures, "connection" or "linkage" can refer not only to a physical connection but also to an electrical connection or a signal connection. For example, it can be a direct connection, i.e., a physical connection, or an indirect connection through at least one intermediate component, as long as the circuit is connected; it can also refer to the internal connection of two components. Signal connection can refer not only to signal connection through a circuit but also to signal connection through a media, such as radio waves. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0041] A circuit breaker is an electrical device that controls the flow of current. It is connected to a circuit system to protect it from short circuits or overloads. A circuit breaker consists of a moving contact and a stationary contact. The moving contact rotates within the circuit breaker, and the stationary contact is positioned along the rotation path of the moving contact, allowing the moving and stationary contacts to connect or disconnect, thereby controlling the flow of current within the circuit breaker. Both the moving and stationary contacts may include a body and a silver contact point. The silver contact point reduces the resistance between the moving and stationary contacts, increasing the current flow rate within the circuit breaker.

[0042] In related technologies, silver dots are welded to the body, and the stability of the connection between the silver dots and the body depends on the precision of the welding process. If incomplete welding or cracks occur during the welding process, the connection between the silver dots and the body may fail, thus affecting the normal flow of current in the circuit breaker and consequently impacting the basic functions of the circuit breaker.

[0043] For example, when a short-circuit fault occurs in a circuit system, the moving contact of the circuit breaker performs a rapid breaking operation, while the stationary contact is subjected to dynamic mechanical impact and thermal stress cycles. In this scenario, microcracks may appear at the welded joint due to stress concentration, causing localized peeling at the interface between the silver contact and the body. If the stability of the connection between the silver contact and the body is not addressed, the contact structure will face a continuous accumulation of connection failure risks during long-term operation. Consequently, the circuit breaker may be unable to maintain a stable current conduction capacity under critical fault conditions, leading to a decrease in the reliability of the circuit protection mechanism.

[0044] Based on this, this application provides a contact structure, a moving contact, a stationary contact, and a circuit breaker. By changing the connection method between the silver contact and the body, it solves the problem of unstable connection between the silver contact and the body caused by welding, achieving long-term stability of the connection between the silver contact and the body, thereby ensuring the stability of current flow in the circuit breaker and ensuring the long-term effectiveness of the circuit breaker's basic functions. The following is a detailed explanation... Figures 1-6 Further explanation is needed.

[0045] Firstly, such as Figures 1-5As shown, this application provides a contact structure 100 for a circuit breaker, comprising a body 1 and a silver dot 2. The body 1 includes a mounting surface 11 disposed along a first direction X. A snap-fit ​​groove 12 is provided on the mounting surface 11, and the snap-fit ​​groove 12 has an opening 11a on the mounting surface 11. The silver dot 2 includes a contact structure 21 and a snap-fit ​​structure 22, which are connected. The snap-fit ​​structure 22 snaps into the snap-fit ​​groove 12, and at least a portion of the contact structure 21 is located outside the snap-fit ​​groove 12 and protrudes from the mounting surface 11. The snap-fit ​​groove 12 includes a groove bottom 14 and a first step structure 13 disposed opposite each other along the first direction X. The first step structure 13 includes a first surface 131 facing the groove bottom 14 and a second surface 132 facing the opening 11a. The first surface 131 and the groove bottom 14 abut against the snap-fit ​​structure 22 along the first direction X. The second surface 132 abuts against the contact structure 21 along the first direction X. The snap-fit ​​groove 12 includes two groove walls 15 disposed opposite each other along a second direction Y. The second direction Y is perpendicular to the first direction X. The two groove walls 15 abut against the snap-fit ​​structure 22 along the second direction Y.

[0046] The body 1 is a component in the contact structure 100 that serves as the basic carrier and conductive substrate. It can be made of a conductive metal material, such as copper or a copper alloy, and includes a mounting surface 11 for mounting the silver dot 2.

[0047] The mounting surface 11 is a specific surface on the body 1 used to support and fix the silver dot 2. This mounting surface 11 is positioned along a first direction X and has a snap-fit ​​groove 12 with an opening 11a for the silver dot 2 to pass through. The first direction X is a spatial reference direction defined in this application, which is the normal direction of the mounting surface 11, and can specifically be as follows: Figure 4 The direction shown is perpendicular to the mounting surface 11 and points from the bottom of the groove 14 to the opening 11a.

[0048] The snap-fit ​​groove 12 is a groove structure formed on the mounting surface 11, used to achieve mechanical interlocking with the snap-fit ​​structure 22. The groove includes a groove bottom 14, an opening 11a, a first step structure 13, and two groove walls 15, which limit and fix the silver point 2 in multiple directions.

[0049] The bottom 14 of the groove is the innermost wall surface of the locking groove 12 that is opposite to the opening 11a along the first direction X. It and the first surface 131 of the first step structure 13 together clamp and abut against the locking structure 22 of the silver point 2 along the first direction X, so as to restrict the movement of the locking structure 22 in the first direction X.

[0050] The opening 11a is the external entrance of the snap-fit ​​groove 12 on the mounting surface 11. The silver dot 2 allows at least part of the contact structure 21 to protrude beyond the mounting surface 11 through the opening 11a.

[0051] The silver point 2 is an electrical contact functional component made of silver or a silver-based alloy material, which is fixed in the snap-fit ​​groove 12 of the body 1 by a snap-fit ​​structure 22. The silver point 2 includes a contact structure 21 for electrical contact and a snap-fit ​​structure 22 for mechanical fixation.

[0052] Among them, contact structure 21 is the part of silver point 2 used to form a separable and configurable electrical contact with mating contacts. Specifically, as shown in... Figure 2 As shown, the contact structure 21 protrudes from the mounting surface 11 of the body 1 through the opening 11a, so that the contact structure 21 of the silver point 2 can contact the mating contact, thereby realizing the normal flow of current in the circuit breaker.

[0053] It should be noted that when the contact structure 21 in this application is applied to the stationary contact of a circuit breaker, the mating contact is the moving contact in that circuit breaker. Conversely, when the contact structure 21 in this application is applied to the moving contact of a circuit breaker, the mating contact is the stationary contact in that circuit breaker.

[0054] Among them, the snap-fit ​​structure 22 is the part of the silver dot 2 used to achieve mechanical connection with the snap-fit ​​groove 12. For example... Figure 2 As shown, the snap-fit ​​structure 22 is accommodated and snapped into the snap-fit ​​groove 12, and abuts against the groove bottom 14 and the first surface 131 of the first step structure 13 in the first direction X, and against the two groove walls 15 in the second direction Y, thereby achieving a stable fixation of the silver dot 2 on the body 1. The second direction Y is perpendicular to the first direction X. Specifically, the second direction Y can be as follows: Figure 4 The arrangement direction of the two groove walls 15 of the snap-fit ​​groove 12 shown.

[0055] Among them, such as Figure 2 and Figure 4 As shown, the first step structure 13 is a key limiting feature constituting the locking groove 12, located between the groove bottom 14 and the opening 11a. This structure includes a first surface 131 and a second surface 132, which respectively abut against the locking structure 22 and the contact structure 21 of the silver point 2 to precisely define the axial position of the silver point 2 within the locking groove 12.

[0056] Among them, such as Figure 2 and Figure 4 As shown, the first surface 131 is the surface of the first step structure 13 facing the bottom of the groove 14. It is arranged opposite to the bottom of the groove 14 along the first direction X, and together they clamp and abut against the locking structure 22 of the silver point 2 to prevent the silver point 2 from displacing into the bottom of the groove 14 along the first direction X.

[0057] Among them, such as Figure 2 and Figure 4As shown, the second surface 132 is the surface of the first stepped structure 13 facing the opening 11a. It abuts against the contact structure 21 of the silver point 2 along the first direction X, thereby limiting the installation position of the contact structure 21, so that those skilled in the art can control the height of the contact structure 21 protruding from the mounting surface 11 by controlling the size of the contact structure 21 in the first direction X.

[0058] Among them, such as Figure 4 As shown, the groove walls 15 are two opposing wall surfaces arranged in the snap-fit ​​groove 12 along the second direction Y. These two groove walls 15 abut against the two sides of the snap-fit ​​structure 22 of the silver point 2 along the second direction Y, thereby restricting the movement of the snap-fit ​​structure 22 in the second direction Y and preventing it from moving laterally.

[0059] According to the description of the first aspect embodiment, this application uses the bottom 14 of the snap-fit ​​groove 12 and the first surface 131 of the first stepped surface to abut against the snap-fit ​​structure 22 along the first direction X, thereby achieving initial positioning of the silver point 2 in the first direction X. The groove wall 15 of the snap-fit ​​groove 12 abuts against the snap-fit ​​structure 22, thereby achieving positioning of the silver point 2 in the second direction Y. Since the first direction X is perpendicular to the second direction Y, the bottom 14, the first surface 131, and the groove wall 15 work together on the snap-fit ​​structure 22, using a mechanical snap-fit ​​method to replace the traditional welding process to position the spatial freedom of the silver point 2, avoiding the risk of connection failure caused by incomplete welding or cracks. In addition, the second surface 132 of the first stepped surface abuts against the contact structure 21 along the first direction X, thereby ensuring that the contact structure 21 protrudes stably from the mounting surface 11 through the opening 11a of the snap-fit ​​groove 12, maintaining its effective contact area with the contact head, and thus ensuring the normal flow of current in the circuit breaker. This technical solution effectively solves the problem of unstable connection between the silver point 2 and the body 1, and significantly improves the reliability and long-term stability of the contact structure 100 in a dynamic working environment.

[0060] In some embodiments, such as Figure 5 As shown, the snap-fit ​​structure 22 enters the snap-fit ​​groove 12 along the third direction Z. The third direction Z is perpendicular to the first direction X and the second direction Y. The snap-fit ​​structure 22 and the snap-fit ​​groove 12 are connected by an interference fit.

[0061] Among them, the third direction Z is perpendicular to the first direction X and the second direction Y, so that the first direction X, the second direction Y and the third direction Z together form a complete spatial rectangular coordinate system. Specifically, as shown in the figure... Figure 5 As shown, the third direction Z can be the installation and pushing direction of the snap-fit ​​structure 22 into the snap-fit ​​groove 12 during the assembly process.

[0062] In this application, the interference fit is a specific mechanical fit between the snap-fit ​​structure 22 and the snap-fit ​​groove 12. Specifically, the dimension of the snap-fit ​​structure 22 in the mating direction is designed to be larger than the dimension of the snap-fit ​​groove 12 in the corresponding direction, thereby creating dimensional interference.

[0063] During the assembly of the snap-fit ​​structure 22, the dimensional interference between the snap-fit ​​structure 22 and the snap-fit ​​groove 12 requires external force to force the snap-fit ​​structure 22 into the snap-fit ​​groove 12 along the third direction Z. This process causes the snap-fit ​​groove 12 to undergo temporary, recoverable elastic deformation. After assembly, the tendency of the snap-fit ​​groove 12 to recover its deformation results in a large radial pressure and static friction between the mating surfaces of the snap-fit ​​structure 22 and the snap-fit ​​groove 12, thereby enabling the silver point 2 and the body 1 to be firmly fixed together without relying on additional fasteners. These fasteners may include, but are not limited to, screws or adhesives.

[0064] According to the description of the above embodiment, the snap-fit ​​structure 22 enters the snap-fit ​​groove 12 along the third direction Z, and the snap-fit ​​structure 22 and the snap-fit ​​groove 12 are interference-fitted, so that the silver point 2 is firmly connected to the body 1, preventing the silver point 2 from coming out of the snap-fit ​​groove 12 in the third direction Z. The friction between the snap-fit ​​structure 22 and the snap-fit ​​groove 12 achieves the limitation of the silver point 2 in the third direction Z. Since the third direction Z is perpendicular to the first direction X and the second direction Y, the above-mentioned friction, groove bottom 14, first surface 131 and groove wall 15 work together on the snap-fit ​​structure 22 to limit the six spatial degrees of freedom of the silver point 2, ensuring the stability of the contact structure 100 and the reliability of current conduction.

[0065] Furthermore, in some embodiments, the dimension of the contact structure 21 in the first direction X is larger than the dimension of the snap-fit ​​structure 22 in the first direction X. The dimension of the contact structure 21 in the second direction Y is larger than the dimension of the snap-fit ​​structure 22 in the second direction Y.

[0066] The dimension of the contact structure 21 in the second direction Y refers to the vertical distance between the two outermost boundary surfaces of the contact structure 21 in the axial direction parallel to the second direction Y. Similarly, the dimension of the snap-fit ​​structure 22 in the second direction Y refers to the vertical distance between the two outermost boundary surfaces of the snap-fit ​​structure 22 in the axial direction parallel to the second direction Y.

[0067] Specifically, the second direction Y and the third direction Z define a plane in space. The mounting surface 11, opening 11a, first surface 131, second surface 132, and groove bottom 14 mentioned above are all parallel to this plane. The dimension of the contact structure 21 in the second direction Y is larger than that of the snap-fit ​​structure 22 in the second direction Y, which can relatively increase the projected area of ​​the contact structure 21 on this plane, thereby increasing the contact area between the contact structure 21 and the mating contact and improving the reliability of current conduction. At the same time, it can relatively reduce the projected area of ​​the snap-fit ​​structure 22 on this plane, thereby reducing the space occupied by the snap-fit ​​structure 22 in the snap-fit ​​groove 12, reducing the volume of the snap-fit ​​groove 12, and avoiding the impact on the structural strength of the body 1 due to the excessive volume of the snap-fit ​​groove 12 opened on the body 1.

[0068] The dimension of the contact structure 21 in the first direction X refers to the vertical distance between the two outermost boundary surfaces of the contact structure 21 in the axial direction parallel to the first direction X. Similarly, the dimension of the snap-fit ​​structure 22 in the first direction X refers to the vertical distance between the two outermost boundary surfaces of the snap-fit ​​structure 22 in the axial direction parallel to the first direction X.

[0069] Specifically, the first direction X is the normal direction perpendicular to the aforementioned plane, and can be used to represent the thickness direction of the component extending along the first direction X with the aforementioned plane as a reference surface. The dimension of the contact structure 21 in the first direction X is larger than the dimension of the snap-fit ​​structure 22 in the first direction X, which relatively increases the thickness of the contact structure 21. This facilitates the smooth protrusion of the contact structure 21 from the mounting surface 11, ensuring stable contact between the contact structure 21 and the mating contact, thereby guaranteeing the reliability of current conduction. Simultaneously, the thickness of the snap-fit ​​structure 22 can be relatively reduced, thereby reducing the space occupied by the snap-fit ​​structure 22 in the snap-fit ​​groove 12, reducing the volume of the snap-fit ​​groove 12, and preventing the snap-fit ​​groove 12 on the body 1 from being too large and affecting the structural strength of the body 1 itself.

[0070] As described in the above embodiments, the dimension of the contact structure 21 in the first direction X / second direction Y is larger than the dimension of the snap-fit ​​structure 22 in the first direction X / second direction Y. This promotes stable contact between the contact structure 21 and the mating contact, thereby ensuring the reliability of current conduction. Furthermore, it reduces the space occupied by the snap-fit ​​structure 22 in the snap-fit ​​groove 12, thus reducing the volume of the snap-fit ​​groove 12. This prevents the snap-fit ​​groove 12 on the body 1 from being too large, which could affect the structural strength of the body 1 itself, and improves the long-term service life of the contact structure 21.

[0071] In some embodiments, such as Figure 2 and Figure 6As shown, a connecting structure 23 is provided between the contact structure 21 and the snap-fit ​​structure 22. The dimension of the first step in the first direction X is equal to the dimension of the connecting structure 23 in the first direction X. The dimension of the snap-fit ​​structure 22 in the first direction X is greater than the dimension of the connecting structure 23 in the first direction X. The dimension of the snap-fit ​​structure 22 in the second direction Y is greater than the dimension of the connecting structure 23 in the second direction Y.

[0072] The connecting structure 23 is a transitional section in the silver point 2 that connects the contact structure 21 and the snap-fit ​​structure 22. Specifically, the connecting structure 23 physically connects the contact structure 21, which serves as the electrical contact area, and the snap-fit ​​structure 22, which serves as the mechanical fixing area, forming an independent geometric section in the silver point 2. Its core function is to facilitate the transition of torque transmission between the contact structure 21 and the snap-fit ​​structure 22.

[0073] As mentioned above, the dimension of the snap-fit ​​structure 22 in the second direction Y is smaller than that of the contact structure 21 in the second direction Y. Therefore, based on the fact that the dimension of the connecting structure 23 in the second direction Y is smaller than that of the snap-fit ​​structure 22, we can conclude that among the silver point 2 formed by the contact structure 21, the connecting structure 23, and the snap-fit ​​structure 22, the connecting structure 23 has the smallest dimension in the second direction Y. Figure 6 As shown, the relatively small connecting structure 23 in the second direction Y corresponds to a groove structure recessed between the contact structure 21 and the snap-fit ​​structure 22. The bottom 14 of the groove structure is formed by the connecting structure 23, and the two sidewalls of the groove structure in the first direction X are formed by the contact structure 21 and the snap-fit ​​structure 22, respectively. At this time, the first step structure 13, used to separate the contact structure 21 and the snap-fit ​​structure 22, can be inserted into the groove structure, forming a snap-fit ​​relationship between the first step structure 13 and the groove structure.

[0074] Based on this, the dimensions of the connecting structure 23 in the first direction X are equal to the dimensions of the first step structure 13 in the first direction X, so that after the first step structure 13 is inserted into the above-mentioned groove structure, the first surface 131 and the second surface 132 can be completely and tightly fitted with the two side walls of the groove structure, that is, the contact structure 21 and the snap-fit ​​structure 22, to avoid the silver point 2 having displacement space in the first direction X, so as to ensure the reliability of the connection between the silver point 2 and the body 1.

[0075] Similarly, as mentioned above, the dimension of the snap-fit ​​structure 22 in the first direction X is smaller than the dimension of the contact structure 21 in the first direction X. Therefore, based on the fact that the dimension of the connecting structure 23 in the first direction X is smaller than the dimension of the snap-fit ​​structure 22 in the first direction X, we can conclude that among the silver point 2 formed by the contact structure 21, the connecting structure 23, and the snap-fit ​​structure 22, the connecting structure 23 has the smallest dimension in the first direction X.

[0076] As a transitional structure between the contact structure 21 and the snap-fit ​​structure 22, the connecting structure 23 has the smallest dimension in the first direction X, which can relatively reduce the thickness of the connecting structure 23, thereby reducing the space occupied by the connecting structure 23 in the snap-fit ​​groove 12, further reducing the volume of the snap-fit ​​groove 12, and avoiding the snap-fit ​​groove 12 on the body 1 being too large, which would affect the structural strength of the body 1 itself.

[0077] According to the description of the above embodiments, the connecting structure 23 connecting the contact structure 21 and the snap-fit ​​structure 22 can effectively disperse the stress borne by the contact structure 21 and the snap-fit ​​structure 22 during the snap-fit ​​process. Meanwhile, the design of the dimensions of the connecting structure 23 in the first direction X and the second direction Y of this application can reduce the volume of the snap-fit ​​groove 12 while ensuring the reliability of the connection between the silver point 2 and the body 1. This avoids the snap-fit ​​groove 12 on the body 1 being too large, which would affect the structural strength of the body 1 itself, thereby improving the long-term service life of the contact structure 21.

[0078] Furthermore, in some embodiments, such as Figure 4 As shown, the first step divides the snap-fit ​​groove 12 along the first direction X into a first receiving groove 121 and a second receiving groove 122. An opening 11a is located in the first receiving groove 121. The bottom 14 is located in the second receiving groove 122. The first receiving groove 121 is adapted to the contact structure 21 to accommodate at least a portion of the contact structure 21. The second receiving groove 122 is adapted to the snap-fit ​​structure 22 to accommodate the snap-fit ​​structure 22.

[0079] The first receiving groove 121 is a groove portion separated by the first stepped structure 13 within the snap-fit ​​groove 12, adjacent to and including the opening 11a. Specifically, the first receiving groove 121 is located on the side of the snap-fit ​​groove 12 in the first direction X that is close to the mounting surface 11, and one end of it is directly connected to the opening 11a.

[0080] The spatial shape and dimensions of the first receiving groove 121 are specifically configured to fit the contact structure 21, to accommodate at least a portion of the contact structure 21, typically its bottom, and to ensure that the main body of the contact structure 21 can smoothly pass through the opening 11a and stably protrude beyond the mounting surface 11. Furthermore, the first receiving groove 121 is typically mechanically interlocked with the contact structure 21 via an interference fit.

[0081] In one specific embodiment, the second surface 132 of the first step structure 13, i.e. the surface facing the opening 11a, can serve as the bottom of the first receiving groove 121, abutting against the contact structure 21 along the first direction X, thereby precisely limiting the protrusion height of the contact structure 21.

[0082] The second receiving groove 122 is a groove portion separated by the first stepped structure 13 within the snap-fit ​​groove 12, adjacent to and including the groove bottom 14. Specifically, the second receiving groove 122 is located on the side of the snap-fit ​​groove 12 away from the mounting surface 11 in the first direction X, and one end of it terminates at the groove bottom 14 of the snap-fit ​​groove 12.

[0083] The spatial shape and size of the second receiving groove 122 are specially configured to fit the snap-fit ​​structure 22, to accommodate the snap-fit ​​structure 22, and to achieve mechanical interlocking with the snap-fit ​​structure 22 by means of interference fit.

[0084] In one specific embodiment, the bottom 14 of the snap-fit ​​groove 12 and the first surface 131 of the first step structure 13, i.e. the surface facing the bottom 14, together form the two boundaries of the second receiving groove 122 in the first direction X, and abut against the two ends of the snap-fit ​​structure 22 along the first direction X, thereby realizing the axial clamping and fixing of the snap-fit ​​structure 22.

[0085] According to the description of the above embodiment, the first step divides the snap-fit ​​groove 12 along the first direction X into a first receiving groove 121 adapted to the contact structure 21 and a second receiving groove 122 adapted to the snap-fit ​​structure 22, so that the contact structures 21 and snap-fit ​​structures 22 of different sizes can be tightly snapped into the different receiving grooves divided by the snap-fit ​​groove 12, so as to achieve a stable connection between the silver point 2 and the body 1.

[0086] Furthermore, those skilled in the art have discovered that during the processing of the body 1, a cutting edge is likely to appear near the opening 11a. The presence of the cutting edge will cause a gap between the contact structure 21 and the first receiving groove 121, resulting in the contact structure 21 having displacement space within the first receiving groove 121.

[0087] Based on this, in some embodiments, such as Figure 2 , Figure 4 as well as Figure 6 As shown, the contact structure 21 includes two side surfaces arranged along the second direction Y. A protrusion 24 is provided on each of the two side surfaces. The first receiving groove 121 includes an inner wall that abuts against the two side surfaces. Two insertion grooves 16 are formed on the inner wall, such that the insertion grooves 16 correspond to the two protrusions 24 respectively. The protrusions 24 are inserted into the insertion grooves 16.

[0088] The protruding structure 24 is a locally convex geometric feature formed on both sides of the contact structure 21. Specifically, the protruding structure 24 can be an insertion part that mates with the insertion groove 16 on the inner wall of the first receiving groove 121. Its core function is to compensate for the assembly gap generated between the contact structure 21 and the inner wall of the first receiving groove 121 due to the machining cutting edge by inserting into the insertion groove 16.

[0089] The insertion groove 16 is a recessed feature formed on the inner wall of the first receiving groove 121 to accommodate the protruding structure 24. Specifically, the insertion groove 16 is precisely formed on the inner wall of the first receiving groove 121 opposite to the side of the contact structure 21, and its position and number correspond one-to-one with the protruding structure 24, ensuring that each protruding structure 24 can be accommodated by the corresponding insertion groove 16.

[0090] According to the description of the above embodiments, the insertion and engagement of the protrusion structure 24 and the insertion groove 16 can eliminate the displacement space of the contact structure 21 in the first receiving groove 121, thereby effectively suppressing the shaking, movement or rotation that may occur due to the gap between the contact structure 21 and the first receiving groove 121, and improving the installation accuracy and positional stability of the silver dot 2 on the body 1.

[0091] In some embodiments, the snap-fit ​​structure 22 can be a cuboid block. Alternatively, the snap-fit ​​structure 22 can be a spherical block.

[0092] Among them, the cuboid structural block refers to a geometric body with a regular plane. The regular plane can form a stable surface contact with the groove wall 15 of the snap-fit ​​groove 12, and the contact pressure is evenly distributed during the interference connection process to avoid installation misalignment caused by local stress concentration.

[0093] Among them, the spherical structure block refers to a geometric body with a continuous curved surface. The adaptive characteristics of the spherical surface can reduce frictional resistance during the snap-fit ​​process and prevent damage to the groove wall 15 caused by hard friction.

[0094] As described in the above embodiments, when the snap-fit ​​structure 22 is a cuboid block, it has the advantage of stable connection. When the snap-fit ​​structure 22 is a spherical block, it has the advantage of low contact friction, which can improve the service life of the structure. Those skilled in the art can select the appropriate structure according to actual needs.

[0095] Furthermore, it should be noted that the snap-fit ​​structure 22 includes, but is not limited to, two forms: cuboid structural blocks and spherical structural blocks. The snap-fit ​​structure 22 block can also be triangular prism, cylindrical, elliptical, or other shapes. This application does not specifically limit these shapes.

[0096] Secondly, this application provides a stationary contact, including the contact structure described in any of the above embodiments.

[0097] Thirdly, this application provides a moving contact, including the contact structure described in any of the above embodiments.

[0098] Fourthly, this application provides a circuit breaker, characterized in that it includes the stationary contact described in the second aspect embodiment and / or the moving contact described in the third aspect embodiment.

[0099] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0100] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A contact structure applied to a circuit breaker, characterized in that, include: The body and the silver dot; The body includes a mounting surface disposed along a first direction; A snap-fit ​​groove is provided on the mounting surface, and the snap-fit ​​groove has an opening on the mounting surface. The silver dot includes a contact structure and a snap-fit ​​structure, and the contact structure is connected to the snap-fit ​​structure. The snap-fit ​​structure snaps into the snap-fit ​​groove, and at least a portion of the contact structure is located outside the snap-fit ​​groove and protrudes from the mounting surface; The snap-fit ​​groove includes a groove bottom and a first step structure disposed opposite to each other along the first direction; The first step structure includes a first surface facing the bottom of the groove and a second surface facing the opening; The first surface and the bottom of the groove abut against the snap-fit ​​structure along the first direction; The second surface abuts against the contact structure along the first direction; The snap-fit ​​groove includes two groove walls arranged opposite each other along the second direction; Wherein, the second direction is perpendicular to the first direction; The two groove walls abut against the snap-fit ​​structure along the second direction.

2. The contact structure according to claim 1, characterized in that, The snap-fit ​​structure enters the snap-fit ​​groove along a third direction; Wherein, the third direction is perpendicular to the first direction and the second direction; The snap-fit ​​structure and the snap-fit ​​groove are connected by an interference fit.

3. The contact structure according to claim 1, characterized in that, The dimension of the contact structure in the first direction is larger than the dimension of the snap-fit ​​structure in the first direction; The dimension of the contact structure in the second direction is larger than the dimension of the snap-fit ​​structure in the second direction.

4. The contact structure according to claim 3, characterized in that, A connecting structure is provided between the contact structure and the snap-fit ​​structure; The dimension of the first step in the first direction is equal to the dimension of the connecting structure in the first direction; The dimension of the snap-fit ​​structure in the first direction is larger than the dimension of the connecting structure in the first direction; The dimension of the snap-fit ​​structure in the second direction is larger than the dimension of the connection structure in the second direction.

5. The contact structure according to any one of claims 1-4, characterized in that, The first step divides the snap-fit ​​groove into a first receiving groove and a second receiving groove along the first direction; The opening is located in the first receiving groove; The bottom of the groove is located in the second receiving groove; The first receiving groove is adapted to the contact structure and is used to accommodate at least a portion of the contact structure; The second receiving groove is adapted to the snap-fit ​​structure and is used to receive the snap-fit ​​structure.

6. The contact structure according to claim 5, characterized in that, The contact structure includes two sides arranged along the second direction; A protruding structure is provided on each of the two sides; The first receiving groove includes an inner wall that abuts against the two sides; Two insertion slots are provided on the inner wall, so that the insertion slots correspond to the two protruding structures respectively; The protruding structure is inserted into the insertion slot.

7. The contact structure according to any one of claims 1-4, characterized in that, The snap-fit ​​structure can be a cuboid block. or, The snap-fit ​​structure is a spherical structural block.

8. A stationary contact, characterized in that, The contact structure includes any one of claims 1-7.

9. A moving contact, characterized in that, The contact structure includes any one of claims 1-7.

10. A circuit breaker, characterized in that, Includes the stationary contact as described in claim 8 and / or the moving contact as described in claim 9.

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