Durable plastic circuit breaker shell

Abstract

The utility model relates to a durable plastic circuit breaker shell which comprises a shell body, contact grooves are formed in the front faces of the two ends of the shell body, electric connection contacts extend in the contact grooves, and the electric connection contacts are bent upwards to form torsion structures and penetrate through the inner side of the shell body inwards. Threaded connection grooves are formed in the back faces of the two ends of the shell and correspond to the contact grooves, and the threaded connection grooves are sleeved with anti-abrasion structures. The circuit breaker has the advantages that the circuit breaker is more durable, and the wiring part of the circuit breaker needs to be reinforced.

Description

Technical Field

[0001] This application relates to the field of circuit breaker technology, and in particular to a durable plastic circuit breaker housing. Background Technology

[0002] Molded case circuit breakers, also known as air switches, have overload long-delay and short-circuit instantaneous protection functions. They can usually be used in conjunction with leakage current devices, measuring and electrical control modules. They need to be installed in switch cabinets, so molded case circuit breakers have high requirements for the air quality of the installation site. However, most of the current applications of circuit breakers are in industrial and urban low-voltage factories.

[0003] Molded case circuit breakers need to be connected to the contacts of external wires via screw connections. During installation, the circuit may need to be adjusted multiple times. During this process, the nuts and bolts will put pressure on the circuit breaker's outer casing, which can cause deformation of the circuit breaker's contacts and support points, affecting the circuit breaker's service life. In view of the above-mentioned technologies, the applicant believes that to make the circuit breaker more durable, the wiring part of the circuit breaker needs to be strengthened. Utility Model Content

[0004] To make circuit breakers more durable, the wiring portion of the circuit breaker needs to be reinforced. This application provides a durable plastic circuit breaker housing.

[0005] The technical solution for a durable plastic circuit breaker housing provided in this application is as follows:

[0006] A durable plastic circuit breaker housing includes a housing with contact grooves arranged on the front of both ends of the housing. Electrical contacts extend from the contact grooves and are bent upward to form a torsion structure and inserted into the inner side of the housing. Screw grooves are arranged on the back of both ends of the housing, corresponding to the contact grooves, and the screw grooves are fitted with anti-wear structures.

[0007] By adopting the above technical solution, the electrical contact is bent upward to form a torsion structure and inserted into the inner side of the housing. This design can prevent the contact from twisting in the plane when the electrical contact is twisted, thus avoiding damage to the circuit breaker that is difficult to repair. The screw groove is set to correspond to the contact groove and is fitted with an anti-wear structure. This design effectively prevents abnormal wear of the screw groove by the bolt during long-term use.

[0008] Preferably, the torsion structure includes a torsion bridge, which is fixed to the power contact. The torsion bridge is low at both ends and high in the middle. Both ends are set at the same height and a gap is left between the two ends. One end is fixed to the power contact and the other end passes through the inside of the housing.

[0009] By adopting the above technical solution, the design of the torsion bridge, which is low at both ends and high in the middle, allows the electrical contacts to produce uniform elastic deformation when subjected to external forces, thereby ensuring that the electrical contacts and internal circuits always maintain a stable contact pressure. This not only improves the reliability of the electrical connection but also reduces contact resistance, lowering the risk of failure due to poor contact.

[0010] Preferably, the torsion structure further includes collapsing grooves, which are vertically spaced on both sides of the torsion bridge.

[0011] Preferably, the wear-resistant structure includes a friction ring and positioning feet, with the friction ring corresponding to the screw groove; the positioning feet are elastically fixed to the friction ring at intervals and inclined inwards, and the positioning feet are vertically inserted through the housing.

[0012] By adopting the above technical solution, the friction ring is set to correspond to the bolt groove, which can effectively reduce the direct wear of the bolt groove on the bolt during long-term use. The positioning support feet are elastically spaced and tilted inward to fix the friction ring, so that the friction ring can be stably installed on the housing.

[0013] Preferably, the wear-resistant structure further includes debris grooves, which are circumferentially spaced on one side of the friction ring opposite the housing.

[0014] Preferably, the wear-resistant structure further includes a limiting block, which is fixed to the side wall of the friction ring and extends inward to abut against the side wall of the threaded groove.

[0015] In summary, this application includes at least one of the following beneficial technical effects:

[0016] The electrical contacts are bent upward to form a torsion structure and inserted into the inner side of the housing. This design prevents the contacts from twisting in the plane when torsion occurs, thus avoiding damage to the circuit breaker that is difficult to repair. The screw groove is set to correspond to the contact groove and is fitted with an anti-wear structure. This design effectively prevents abnormal wear of the screw groove by the bolt during long-term use.

[0017] The design of the torsion bridge, with its low ends and high center, allows the electrical contacts to undergo uniform elastic deformation under external force, ensuring a stable contact pressure between the contacts and the internal circuitry. This not only improves the reliability of the electrical connection but also reduces contact resistance, lowering the risk of failure due to poor contact.

[0018] The friction ring is designed to correspond to the bolt groove, which can effectively reduce the direct wear of the bolt groove on the bolt during long-term use. The positioning feet are elastically spaced and tilted inward to fix the friction ring, so that the friction ring can be stably installed on the housing. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of an embodiment of this application;

[0020] Figure 2 This is a cross-sectional view illustrating the torsion structure in an embodiment of this application;

[0021] Figure 3 This is a partial structural diagram of an embodiment of this application;

[0022] Figure 4 This is a schematic diagram illustrating the wear-resistant structure in an embodiment of this application.

[0023] Explanation of reference numerals in the attached drawings: 1. Housing; 2. Contact groove; 3. Screw groove; 4. Torsion structure; 41. Torsion bridge; 42. Collapse groove; 5. Wear-resistant structure; 51. Friction ring; 52. Positioning support; 53. Debris groove; 54. Limiting block; 6. Electrical contact. Detailed Implementation

[0024] The present application will be further described in detail below with reference to the accompanying drawings.

[0025] This application discloses a durable plastic circuit breaker housing, referring to... Figure 1 , 2 It includes a housing 1, with contact grooves 2 arranged on the front of both ends of the housing 1 and screw grooves 3 arranged on the back of both ends of the housing 1, with the contact grooves 2 and screw grooves 3 being set in a corresponding manner.

[0026] Reference Figure 2 , 3 The contact groove 2 extends into which an electrical contact 6 is connected to the contact. The electrical contact 6 is connected to the inside of the housing 1 through a torsion structure 4. The torsion structure 4 includes a torsion bridge 41 and a collapsible groove 42. The torsion bridge 41 is fixed to the electrical contact 6. The torsion bridge 41 is lower at both ends and higher in the middle. Both ends are set at the same height and a gap is left between the two ends. One end is fixed to the electrical contact 6, and the other end passes through the inside of the housing 1. When the torsion bridge 41 is displaced at the connection contact, the upper bent part can collapse or expand according to the direction of the torsion, so as to prevent the electrical contact 6 from bending in the same plane, which would lead to an increase in internal resistance.

[0027] Reference Figure 2 , 3 The collapsible grooves 42 are vertically spaced on both sides of the torsion bridge 41. Since the deformation on both sides of the torsion bridge 41 is the greatest when it is torsion, the collapsible grooves 42 can reduce the internal stress of the material on both sides of the torsion bridge 41 and avoid the internal stress causing the local conductivity of the metal to decrease and the resistance to increase.

[0028] Reference Figure 3 , 4The screw groove 3 is provided with an anti-wear structure 5 to enhance the wear resistance of the housing 1. The anti-wear structure 5 includes a friction ring 51, positioning feet 52, a debris groove 53 and a limiting block 54. The friction ring 51 is provided corresponding to the screw groove 3. The positioning feet 52 are elastically and inwardly fixed to the friction ring 51 at intervals. The positioning feet 52 are vertically inserted into the housing 1 to facilitate the positioning of the friction ring 51. The inward elastic inclination provides clamping force to prevent it from falling off.

[0029] Reference Figure 3 , 4 The debris groove 53 is circumferentially spaced on one side of the friction ring 51 opposite the housing 1. When the nut rubs against the friction ring 51 and generates debris, the debris will enter the debris groove 53 as the nut rotates, preventing the nut from slipping against the friction ring 51. The limiting block 54 is fixed to the side wall of the friction ring 51 and extends inward to abut against the side wall of the screw groove 3, so that the friction ring 51 can be stably positioned by the inner wall of the screw groove 3, and will not break the positioning support leg 52 due to excessive torque from the nut.

[0030] The working process of this application is as follows: when the bolt is aligned with the contact groove 2 and the nut is aligned with the screw groove 3, the bolt and nut are screwed together to clamp the housing 1 and the electrical contact 6. The nut generates a torque on the side of the electrical contact 6 and deforms and bends through the torsion bridge 41, thereby preventing the electrical contact 6 from bending and maintaining the stability of its resistance value. The torque of the lower nut acts on the friction ring 51. The friction ring 51 can prevent the nut from directly rubbing against the housing 1, help to balance the pressure it receives, and avoid wear caused by direct contact, thereby maintaining the durability of the housing 1.

[0031] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A durable plastic circuit breaker housing, comprising a housing (1), characterized in that: The housing (1) has contact grooves (2) arranged on the front of both ends, and electrical contacts (6) extend from the contact grooves (2). The electrical contacts (6) are bent upward to form a torsion structure (4) and pass inward to the inside of the housing (1). The housing (1) has screw grooves (3) arranged on the back of both ends, and the screw grooves (3) are set corresponding to the contact grooves (2). The screw grooves (3) are fitted with anti-wear structures (5).

2. The durable plastic circuit breaker housing according to claim 1, characterized in that: The torsion structure (4) includes a torsion bridge (41), which is fixed to the power contact (6). The torsion bridge (41) is low at both ends and high in the middle. Both ends are set at the same height and there is a gap between the two ends. One end is fixed to the power contact (6) and the other end passes through the inside of the housing (1).

3. The durable plastic circuit breaker housing according to claim 2, characterized in that: The torsion structure (4) also includes a collapse groove (42), which is vertically spaced on both sides of the torsion bridge (41).

4. The durable plastic circuit breaker housing according to claim 1, characterized in that: The wear-resistant structure (5) includes a friction ring (51) and a positioning foot (52). The friction ring (51) is provided in relation to the screw groove (3). The positioning foot (52) is fixed to the friction ring (51) at intervals and tilted inwards. The positioning foot (52) is vertically inserted into the housing (1).

5. A durable plastic circuit breaker housing according to claim 4, characterized in that: The wear-resistant structure (5) also includes a chip groove (53), which is circumferentially spaced on one side of the friction ring (51) opposite the housing (1).

6. A durable plastic circuit breaker housing according to claim 4, characterized in that: The wear-resistant structure (5) also includes a limiting block (54), which is fixed to the side wall of the friction ring (51) and extends inward to abut against the side wall of the screw groove (3).

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