MCB circuit breaker wiring terminal protection device

Abstract

The invention relates to an MCB circuit breaker wiring terminal protection device. The device comprises a base (1), a cover cap (2), a rotary base (3) and two protective covers (4), the base (1) is ofa circular tube structure, and two fulcrum bolts (12) are symmetrically arranged on the end face of the base (1). The rotating base (3) is of a round cover structure, and two transmission plug pins (31) are symmetrically arranged on the inner surface of the end face of the rotating base (3). The rotary base (3) is arranged in the cover cap (2), and circular through holes are formed in the front end surface and the rear end surface of the cover cap (2) and the end surface of the rotary base (3); the round through hole in the rear end face of the cover cap (2) is hooped on the base (1), a fixing hole (41) and a limiting groove (42) are correspondingly formed in the upper surface and the lower surface of each protective cover (4), and the fulcrum plug pin (11) and the transmission plug pin (31) are inserted into the limiting grooves (42) and the fixing holes (41) of the protective covers (4) respectively. Compared with the prior art, the device has the advantages of simple operation, high protection level and the like.

Description

technical field [0001] The invention relates to the technical field of circuit breakers, in particular to an MCB circuit breaker terminal protection device. Background technique [0002] MCB (Micro Circuit Breaker / Miniature Circuit Breaker) circuit breaker is a miniature circuit breaker, which is the most widely used terminal protection device in building electrical terminal power distribution devices. It has advanced structure, reliable performance, strong breaking capacity and beautiful appearance. Small and exquisite, it is used for overload and short circuit protection of lighting, distribution lines and equipment of office buildings, residential buildings, etc., and can be used for on-off and conversion lines. The current general-purpose MCB circuit breaker shell is composed of a bottom and a cover. Due to factors such as product structure, assembly process, and mold structure, it is designed into two parts, and the assembly line is in the middle. figure 2 , the wiring...

AI Technical Summary

Problems solved by technology

[0003] One is that the splicing line at the screw will be affected by the torsion during wiring, which will cause tension on the hole wall and cause the gap to increase, especially when using an impact-type electric or pneumatic screwdriver, when the shell exceeds the bearing capacity, it will produce irreparable plastic deformation ,Affect the appearance;

[0004] Second, because the wiring screw holes are open, the protection level is only IP20. In order to improve the IP protection level, a cover is usually added to the terminal, but the cover is separated from the shell, and the cover is easy to fall and it is inconvenient to open;

[0005] The third is that when the cover and the base are assembled and riveted, there will be an assembly line in the middle of the shell. The assembly line may appear obvious due to processing accuracy, mold, shrinkage of plastic parts, etc., which will affect the appearance and affect the customer's first perception.

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