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Breaker and safety circuit

A circuit breaker and fixed contact technology, applied in the field of circuit breakers, can solve the problems of increasing the internal space of the housing and hindering the low height of the housing, and achieve the effect of suppressing interference and suppressing instantaneous conduction

Pending Publication Date: 2021-03-16
BOURNS KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to ensure a sufficient gap between the fixed contact and the movable contact in the cut-off state, it is necessary to increase the internal space of the case, which is one of the factors hindering the reduction of the height of the case.

Method used

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  • Breaker and safety circuit
  • Breaker and safety circuit
  • Breaker and safety circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] A circuit breaker according to an embodiment of the present invention will be described with reference to the drawings. Figure 1 to Figure 3 The structure of the circuit breaker is shown. Such as figure 1 and image 3 As shown, the circuit breaker 1 includes a pair of terminals 22 and 42 partially exposed from the housing 10 to the outside. The circuit breaker 1 is electrically connected to an external circuit (not shown) through the terminals 22 and 42, so that the circuit breaker 1 constitutes a main part of a safety circuit of an electric device.

[0033] Such as figure 1 As shown, the circuit breaker 1 is composed of a fixed piece 2 with a fixed contact 21 and a terminal 22, a movable piece 4 with a movable contact 41 at the front end, and a thermal response element 5 that deforms with temperature changes, etc. .

[0034] The fixed piece 2 , the movable piece 4 and the thermal response element 5 are accommodated in the casing 10 . The case 10 is composed of a...

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Abstract

A breaker (1) is provided with: a fixed contact (21); a movable piece (4) having an elastic part (44), which is formed in a plate-like shape and which elastically deforms, and a movable contact (41) disposed at a tip of the elastic part (44), whereby the movable contact (41) is pressed against the fixed contact (21) to establish contact therebetween; a thermally-actuated element (5) which deformsin response to a change in temperature so as to cause the state of the movable piece (4) to transition from a conductive state to a disconnected state; a case body (7) for housing the fixed contact (21), the movable piece (4), and the thermally-actuated element (5); and a cover member (8) attached to the case body (7) so as to at least partly cover the movable piece (4) and the thermally-actuatedelement (5). A retreat part (82) which retreats in a direction away from the fixed contact (21), is locally formed in an inner surface (81) of the cover member (8) facing the movable piece (4) side and in a region facing the fixed contact (21)via the movable piece (4).

Description

technical field [0001] The present invention relates to a small circuit breaker and the like suitable for a safety circuit of electric equipment. Background technique [0002] Conventionally, circuit breakers have been used as protection devices (safety circuits) for secondary batteries and motors of various electrical equipment. When an abnormality occurs, for example, when the temperature of the secondary battery rises excessively during charging and discharging, or when an overcurrent flows through a motor equipped in a car, home appliance, etc., the circuit breaker protects the Secondary battery or motor, etc. cut off the current. A circuit breaker used as such a protection device is required to operate correctly (with good temperature characteristics) following temperature changes and to have a stable resistance value during energization in order to ensure the safety of equipment. [0003] The circuit breaker includes a thermally responsive element that operates in re...

Claims

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Application Information

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IPC IPC(8): H01H37/04H01H37/54
CPCH01H37/04H01H37/54
Inventor 吉冈将起
Owner BOURNS KK
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