Miniature circuit breaker convenient to assemble

Abstract

The utility model discloses a miniature circuit breaker convenient to assemble, which comprises a base, a tripping piece, a contact frame and a torsion spring are arranged in the base, the tripping piece is provided with a cavity for accommodating the torsion spring, one side of the cavity is provided with an abutting part, one side of the tripping piece, which is far away from the abutting part, is provided with a marking part, and the marking part is provided with a button. The contact frame is provided with a protruding pressure-bearing portion, the protruding pressure-bearing portion and the marking portion are located in the same direction, one end of the torsion spring abuts against the abutting portion, the other end of the torsion spring abuts against the pressure-bearing portion, and therefore the tripping piece and the contact frame move in a linkage mode. By changing the position of the pressure-bearing part, a space for the mechanical grippers to take in is reserved between the abutting part and the pressure-bearing part, so that the situation that the torsional spring is assembled in place by the two mechanical grippers at the same time is avoided, the assembling steps are also suitable for manual assembling, and by means of the structural design, the assembling efficiency is greatly improved, and convenience is provided for assembling.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a miniature circuit breaker which is easy to assemble. Background Art

[0002] Miniature circuit breakers are important control and protection devices in low-voltage power distribution systems. They can quickly interrupt fault currents when overload or short circuit occurs in the power distribution system, protecting the power distribution system and electrical equipment.

[0003] According to utility model patent application number 202420935499.4, "A tripping mechanism for a leakage circuit breaker" discloses a base, a tripping mechanism rotatably connected to the base, and a handle rotatably connected to the base. The tripping mechanism includes a swinging member, a tripping block, a tripping frame, and a contact pressure-bearing portion. One end of the tripping block is hinged to one end of the swinging member and abuts the tripping frame. The tripping block is provided with a connecting rod and connected to the handle. The tripping frame is linked to the swinging member. The utility model pre-installs a second torsion spring in the base through a second abutting surface, a pre-abutting surface, and a cylinder, facilitating assembly of the tripping mechanism. The contact pressure-bearing portion is movably connected to the swinging member through the first torsion spring. The tripping frame is movably connected to the swinging member through a transmission arm. The tripping frame provides support for the tripping block, forming the tripping mechanism as a whole. This greatly reduces the time required for assembly, giving the product the advantages of improved assembly efficiency and reduced manufacturing costs.

[0004] The installation space for the first torsion spring in the above technical solution is narrow, which not only makes it difficult for assemblers to install it quickly, but also increases the installation steps of the two robotic grippers on the automated production line due to the narrow installation space, thereby reducing the assembly efficiency of the first torsion spring. Therefore, the applicant has made a beneficial design and found a solution to the above problem. The technical solution to be introduced below was produced in this context. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings of the above technical solutions and to provide a product that is easy to assemble and improves assembly efficiency.

[0006] In order to solve the above problems, the present invention adopts the following technical solutions.

[0007] A miniature circuit breaker that is easy to assemble includes a base, in which a tripping piece, a contact frame, and a torsion spring are arranged. The tripping piece is provided with a cavity for accommodating the torsion spring, and a resistance portion is provided on one side of the cavity. The tripping piece is provided with a marking portion on a side away from the resistance portion. The contact frame is provided with a raised pressure-bearing portion that is in the same direction as the marking portion. One end of the torsion spring abuts the resistance portion, and the other end of the torsion spring abuts the pressure-bearing portion, so that the tripping piece and the contact frame move in conjunction.

[0008] Preferably, the cavity is provided with a guide pillar, and the abutting part is provided with a notch.

[0009] Preferably, the pressure-bearing part is arranged at the outlet of the notch, and a blocking part is arranged on one side of the pressure-bearing part.

[0010] Preferably, one end of the torsion spring passes through the notch, and both ends of the torsion spring are in a V-shaped structure.

[0011] Preferably, the base is provided with a pin shaft, which passes through the contact holder and the guide pillar.

[0012] Advantageous effects:

[0013] Compared with the prior art, the advantageous effects of the present utility model are as follows:

[0014] In the present utility model, by changing the position of the pressure-bearing part, a space for the mechanical gripper to pick up is left between the abutting part and the pressure-bearing part. Moreover, the shapes of both ends of the torsion spring are changed into a V-shaped structure. The mechanical gripper can first place the torsion spring in the cavity, and then place one end of the torsion spring on the pressure-bearing part. At the same time, the other end of the torsion spring is automatically abutted against the abutting part under the influence of its own torsion force, completing the assembly of the torsion spring. Through the above optimization of the structure, it is thus avoided that two mechanical grippers assemble the torsion spring in place at the same time, greatly improving the assembly efficiency. The above assembly steps are also applicable to manual assembly; Description of the drawings

[0015] Figure 1 is a schematic structural diagram of a miniature circuit breaker convenient for assembly according to the present utility model during opening;

[0016] Figure 2 is a schematic structural diagram of a miniature circuit breaker convenient for assembly according to the present utility model during closing;

[0017] Figure 3 is an exploded view of a miniature circuit breaker convenient for assembly according to the present utility model

[0018] The corresponding relationship between the reference numerals in the drawings and the component names is as follows:

[0019] Reference numerals: 1, base; 2, release part; 3, contact holder; 4, torsion spring; 11, pin shaft; 21, cavity; 22, abutting part; 23, marking part; 24, guide pillar; 2, notch; 31, pressure-bearing part; 32, blocking part. Specific embodiments

[0020] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left" and "right" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0022] In the embodiments of the present invention, "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0023] Reference example Figures 1 to 3 A miniature circuit breaker that is easy to assemble includes a base 1, in which a tripping member 2, a contact frame 3, and a torsion spring 4 are arranged. The tripping member 2 has a cavity 21 for accommodating the torsion spring 4, and a resistance portion 22 is provided on one side of the cavity 21. The tripping member 2 has a marking portion 23 on the side away from the resistance portion 22. The contact frame 3 has a raised pressure-bearing portion 31 in the same direction as the marking portion 23. One end of the torsion spring 4 abuts the resistance portion 22, and the other end of the torsion spring 4 abuts the pressure-bearing portion 31, so that the tripping member 2 and the contact frame 3 move in conjunction with each other. By changing the position of the pressure-bearing portion 31, A space is left between the abutment portion 22 and the pressure-bearing portion 31 for the mechanical claw to pick up, and the shapes of the two ends of the torsion spring 4 are changed to a V-shaped structure. The mechanical claw can first place the torsion spring 4 in the cavity 21, and then place one end of the torsion spring 4 on the pressure-bearing portion 31. At the same time, the other end of the torsion spring 4 is affected by its own torsion force and automatically abuts the abutment portion 22 to complete the assembly of the torsion spring 4. Through the above-mentioned optimization of the structure, it is avoided that two mechanical claws assemble the torsion spring 4 in place at the same time, which greatly improves the assembly efficiency. The above-mentioned assembly steps are also applicable to manual assembly.

[0024] It is worth mentioning that the cavity 21 is provided with a guide post 24 and the abutment portion 22 is provided with a notch 221. The guide post 24 prevents the torsion spring 4 from escaping, and the notch 221 facilitates one end of the torsion spring 4 to pass through.

[0025] It is worth mentioning that the pressure-bearing part 31 is arranged at the outlet of the notch 221, and a blocking part 32 is provided on one side of the pressure-bearing part 31. The blocking part 32 prevents the torsion spring 4 from disengaging from the pressure-bearing part 31 due to the torsional force generated by the rotation of the detaching part 2 and the contact head frame 3;

[0026] It is worth mentioning that one end of the torsion spring 4 passes through the notch 221, and both ends of the torsion spring 4 are in a V-shaped structure;

[0027] It is worth mentioning that the base 1 is provided with a pin shaft 11, which passes through the contact head frame 3 and the guide post 24. The detaching part 2 and the contact head frame 3 rotate around the pin shaft 11 as the axis.

[0028] Through the above design scheme, the product can achieve the advantages of being easy to assemble and improving the assembly efficiency.

[0029] The above content is a further detailed description of the present invention in combination with specific embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope determined by the claims submitted for the present invention.

Claims

1. A miniature circuit breaker convenient for assembly, comprising a base (1), wherein a releasing member (2), a contact holder (3), and a torsion spring (4) are arranged inside the base (1), and it is characterized in that: The release member (2) is provided with a cavity (21) for accommodating a torsion spring (4); a contact portion (22) is provided on one side of the cavity (21); a marking portion (23) is provided on the side of the release member (2) away from the contact portion (22); the contact frame (3) is provided with a raised pressure-bearing portion (31) and is in the same direction as the marking portion (23); one end of the torsion spring (4) abuts against the abutting portion (22), and the other end of the torsion spring (4) abuts against the pressure-bearing portion (31), so that the release member (2) and the contact frame (3) move in a linked manner.

2. The micro circuit breaker facilitating assembly according to claim 1, wherein: The mold cavity (21) is provided with a guide column (24), and the abutment portion (22) is provided with a notch (221).

3. The miniature circuit breaker facilitating assembly according to claim 2, wherein: The pressure-bearing portion (31) is arranged at the outlet of the notch (221), and a blocking portion (32) is provided on one side of the pressure-bearing portion (31).

4. The miniature circuit breaker facilitating assembly according to claim 2, characterized in that: One end of the torsion spring (4) passes through the notch (221), and both ends of the torsion spring (4) are in a V-shaped structure.

5. The miniature circuit breaker facilitating assembly according to claim 2, characterized in that: The base (1) is provided with a pin shaft (11) which passes through the contact frame (3) and the guide column (24).

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