Circuit breaker shell, fastener and circuit breaker shell device

Abstract

The invention provides a circuit breaker shell, a fastener and a circuit breaker shell device. The circuit breaker shell comprises a first shell body and a second shell body; the first shell body and the second shell body are both provided with a first lug boss and a second lug boss which are symmetric each other; and when the first shell body and the second shell body are combined together, one edge of the first shell body is adhered to one edge of the second shell body, and the distance between the other edge of the first shell body and the other edge of the second shell body gradually increases first and then decreases. The shell bodies of the circuit breaker shell can be combined together in a clamping way more firmly and closely, thus the reliability of the circuit breaker is guaranteed. Compared with the fastener having external occlusal force in the prior art, the fastener provided by the invention has internal occlusal force, thus the shell bodies of the circuit breaker shell can be combined closely without a gap being left, the direction of the airflow generated from breaking can not be affected, and the normal breaking of the circuit breaker can be guaranteed. The fastener is easier to assemble and disassemble, and the circuit breaker is convenient to maintain.

Description

technical field [0001] The invention relates to the technical field of electronic circuit control, and in particular to a circuit breaker casing, buckle and circuit breaker casing device. Background technique [0002] A circuit breaker (English name: circuit-breaker, circuit breaker) refers to the ability to close, carry and break current under normal circuit conditions, and to close, carry and break abnormal circuit conditions within a specified time (including short circuit conditions). conditions) current switching device. Circuit breakers can be used to distribute electric energy, start asynchronous motors infrequently, protect power lines and motors, and automatically cut off the circuit when they are severely overloaded, short-circuited, or under-voltage. Its function is equivalent to a fuse-type switch. Combination with overheating and underheating relays, etc. Moreover, there is generally no need to change parts after breaking the fault current. At present, it has...

AI Technical Summary

Problems solved by technology

[0005] In view of this, in view of this, the present invention aims to solve the problem in the prior art that the small-sized low-voltage electrical appliances and the guide rail are not installed firmly due to the problem that the buckle of the small circuit breaker is not firmly engaged with the housing, and it is not easy to use it. Convenience, unreliability and other technical issues

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