A moving contact assembly for a circuit breaker

Abstract

The utility model discloses a movable contact assembly for circuit breaker, including contact support and movable contact, wherein, the contact support is integrally formed on the movable contact, the movable contact includes contact part and the connecting portion of contact support connection, when the connecting portion with contact support connects, the connecting portion is embedded in the inside of contact support. Above all, through the injection of contact support and movable contact's connection, has spared the hot riveting technological procedure, has reduced production cost greatly, and when integral injection, four faces of movable contact are all covered by contact support, increases the connecting area, has greatly promoted the reliability of connection, has solved the defect of easy falling in the large current working condition.

Description

Technical Field

[0001] This utility model relates to the technical field of circuit breaker accessories, specifically a moving contact assembly for a circuit breaker. Background Technology

[0002] Currently, the connection between the plastic contact support and the moving contact in miniature circuit breakers is basically achieved in two ways: one is by hot riveting, and the other is by using pins or rivets. Both of these methods require the plastic parts to be injection molded first, the moving contact to be spot-welded, and then hot-riveted or pinned together. This process is complex, has a small connection area, is prone to detachment under high current conditions, and suffers from poor reliability. Utility Model Content

[0003] The purpose of this invention is to provide a moving contact assembly for a circuit breaker to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a moving contact assembly for a circuit breaker, comprising a contact support and a moving contact; wherein the contact support is integrally formed on the moving contact; the moving contact includes a contact portion and a connecting portion connected to the contact support, wherein when the connecting portion is connected to the contact support, the connecting portion is embedded inside the contact support; after the contact support is formed on the moving contact, a positioning post is formed between the contact support and the through hole; the moving contact is also provided with a welding arm, wherein when the moving contact and the contact support are formed, the side of the welding arm abuts against the contact support.

[0005] As a preferred technical solution of this utility model: the connecting part is also provided with a positioning hole, and the moving contact is fixed on the mold by means of the positioning hole, so as to facilitate the contact support forming on the moving contact.

[0006] As a preferred technical solution of this utility model, the connecting part is wedge-shaped.

[0007] As a preferred technical solution of this utility model: the moving contact is further provided with a through hole, and the contact area between the moving contact and the contact support is expanded through the through hole.

[0008] As a preferred technical solution of this utility model: the contact support is further provided with a support platform, and the support platform abuts against the welding arm.

[0009] The beneficial effects of this utility model by adopting the above technical solution are as follows: the connection between the contact support and the moving contact is completed by injection molding, eliminating the hot riveting process and greatly reducing production costs; and during the one-piece injection molding, all four sides of the moving contact are covered by the contact support, increasing the connection area, greatly improving the reliability of the connection, and solving the defect of easy detachment under high current conditions. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0011] Figure 2 This is a cross-sectional schematic diagram of the main structure of this utility model;

[0012] Figure 3 This is a schematic diagram of the main structure of the contact support of this utility model;

[0013] Figure 4 This is a schematic diagram of the main structure of the moving contact of this utility model.

[0014] In the diagram: 1. Contact support; 2. Moving contact; 20. Contact part; 21. Connecting part; 22. Welding arm; 23. Positioning hole; 24. Through hole; 3. Positioning post; 4. Support platform. Detailed Implementation

[0015] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "upper surface," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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, and therefore should not be construed as limiting this utility model.

[0016] Please see Figure 1-4 The present invention provides an embodiment of a moving contact assembly for a circuit breaker, comprising a contact support 1 and a moving contact 2; wherein the contact support 1 is formed on the moving contact 2 by injection molding; the moving contact 2 includes a contact portion 20 and a connecting portion 21 connected to the contact support 1, wherein when the connecting portion 21 is connected to the contact support 1, the connecting portion 21 is embedded inside the contact support 1.

[0017] In summary, by completing the connection between the contact support 1 and the moving contact 2 through injection molding, the hot riveting process is eliminated, which greatly reduces the production cost. Moreover, during the one-piece injection molding, all four sides of the moving contact 2 are covered by the contact support 1, which increases the connection area and greatly improves the reliability of the connection, solving the defect of easy detachment under high current conditions.

[0018] Furthermore, the connecting part 21 is also provided with a positioning hole 23, which is used to fix the moving contact 2 on the mold so that the contact support 1 can be formed on the moving contact 2. Thus, when the moving contact 2 is placed on the forming mold of the contact support 1, it can be connected to the corresponding pin on the mold through the positioning hole 23 to fix the moving contact 2 on the forming mold of the contact support 1, so as to reliably fix one side of the moving contact 2 inside after the contact support 1 is formed.

[0019] Furthermore, since the connecting part 21 is wedge-shaped, the contact area between the connecting part 21 and the contact support 1 can be further expanded by utilizing the wedge structure, which can further ensure the stability between the contact support 1 and the moving contact 2.

[0020] Because the moving contact 2 is also provided with a through hole 24, the contact area between the moving contact 2 and the contact support 1 is increased through the through hole 24. Specifically, after the contact support 1 is formed on the moving contact 2, a positioning post 3 is formed at the contact support 1 and the through hole 24. Thus, the contact area between the moving contact 2 and the contact support 1 can be increased inside, thereby enhancing the connection strength between the two from the inside. In particular, the positioning post 3 is also formed after the contact support 1 is formed, and it can also penetrate through the through hole 24, so that the moving contact 2 is stably located inside the contact support 1.

[0021] Based on the above solution, since the moving contact 2 is also provided with a welding arm 22, after the moving contact 2 and the contact support 1 are formed, the side of the welding arm 22 abuts against the contact support 1. Furthermore, the contact support 1 is also provided with a support platform 4, which abuts against the welding arm 22. After the wire is welded to the welding arm 22, the welding arm 22 can also abut against the support platform 4, further strengthening the structural strength of the moving contact 2 and the contact support 1.

[0022] In summary, this contact assembly achieves the connection between the moving contact 2 and the contact support 1 through injection molding. By changing the structure of the connection part of the moving contact 2, the contact area between the moving contact 2 and the contact support is expanded. Furthermore, the contact surface between the moving contact 2 and the contact support 1 is further increased inside the moving contact 2 using the through hole 24. Thus, by increasing the contact surface, the stability of the connection between the two is improved, thereby ensuring that the moving contact assembly can reliably guarantee the opening and closing of the circuit. Even if the contact support 1 heats up, the moving contact 2 will not easily separate from it.

[0023] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A moving contact assembly for a circuit breaker, characterized in that: It includes a contact support (1) and a moving contact (2); wherein the contact support (1) is integrally formed on the moving contact (2); The moving contact (2) includes a contact portion (20) and a connecting portion (21) connected to the contact support (1). When the connecting portion (21) is connected to the contact support (1), the connecting portion (21) is embedded inside the contact support (1). The moving contact (2) is also provided with a through hole (24), and the contact area between the moving contact (2) and the contact support (1) is increased through the through hole (24); After the contact support (1) is formed on the moving contact (2), a positioning post (3) is formed at the contact support (1) and the through hole (24). The moving contact (2) is also provided with a welding arm (22). When the moving contact (2) and the contact support (1) are formed, the side of the welding arm (22) abuts against the contact support (1).

2. The moving contact assembly for a circuit breaker according to claim 1, characterized in that: The connecting part (21) is also provided with a positioning hole (23), and the moving contact (2) is fixed on the mold by means of the positioning hole (23) so that the contact support (1) is formed on the moving contact (2).

3. The moving contact assembly for a circuit breaker according to claim 2, characterized in that: The connecting part (21) is wedge-shaped.

4. The moving contact assembly for a circuit breaker according to claim 3, characterized in that: The contact support (1) is also provided with a support platform (4), and the support platform (4) abuts against the welding arm (22).

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