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circuit breaker

A technology of circuit breakers and circuits, applied in circuits, circuit breaker parts, electrical switches, etc., can solve problems such as inability to meet product performance, and achieve the effect of increasing connection force

Active Publication Date: 2017-03-08
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the demand for circuit breakers in recent years has miniaturization and high breaking capacity, the product performance cannot be satisfied only by space allocation, and the idea of ​​effectively using the dead zone has become essential (see patent Literature 1)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0022] Figure 1 to Figure 6 An example of the circuit breaker according to Embodiment 1 of the present invention is shown, specifically, figure 1 It is a perspective view of a tripped state, (a) shows the appearance, (b) shows the view with the cover part removed from (a), and (c) shows the structure after the switch mechanism part is separated from (b). figure 2 It is an exploded perspective view of the movable contact part showing the open state, (a) shows the general appearance, (b) shows the state after the movable contact is separated from the cross bar, (c) shows the (b) ) state after the movable contact piece is further disassembled. image 3 is a circuit breaker (along figure 1 (a) shows the off state, and (b) shows the on state. Figure 4 yes figure 1 The disassembled oblique view of the opening and closing mechanism part in Figure 5 yes figure 1 An exploded perspective view of the movable contact part in . Figure 6 is the movable contact part (along F...

Embodiment approach 2

[0047] Figure 7 An example of a circuit breaker according to Embodiment 2 of the present invention is shown. Contrary to Embodiment 1 described above, the cross-sectional shape of the cross-bar rotation shaft 11s is a perfect circle, and the support portions 2a and 12d are substantially elliptical. Even in this case, the substantially non-circular shape such as the shape or the elongated hole shape depends on the cross-bar rotation axis viewed in the extending direction of the center of the cross-bar rotation axis 11s as in the case of the above-mentioned first embodiment. 11s and the difference in cross-sectional shape of the support parts 2a, 12d, in the process of connecting the circuit breaker, through the connecting force of the opening and closing mechanism part 51, the axis of the cross bar rotation shaft 11s is from the first axis 11b2 to the second. The axis 11c2 automatically moves, and conversely, during the disconnection of the circuit breaker, the axis of the cro...

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PUM

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Abstract

A circuit breaker in which a circuit breaker chassis (101c) is internally provided with: an opening / closing mechanism unit (51); a holding member (11) which is connected to the opening / closing mechanism unit and which is caused to rotate by the action of the opening / closing mechanism unit; a movable contact (10) held by the holding member; and a fixed contact (8) opened and closed by the movable contact, which rotates with the rotation of the holding member. The shape of a bearing surface of a support part for rotatably supporting the holding member as viewed in the direction of the center of rotation of the holding member and the shape of a borne surface of the holding member borne by the bearing surface of the support part as viewed in the direction of the aforementioned center of rotation are formed to different shapes. A first axial core (11b) of the holding member in the open state and a second axial core (11c) of the holding member in the state in which the movable contact is closed are located in different positions, increasing the input power of the movable contact.

Description

technical field [0001] The present invention relates to a circuit breaker such as a circuit breaker for wiring and an earth leakage circuit breaker, and specifically relates to a circuit breaker that ensures crimping of opening and closing contacts. Background technique [0002] A circuit breaker is generally composed of the following components: a mechanism part, which is used to contact / separate movable contacts to open and close the circuit; a trip part, which detects the flow of overcurrent and short-circuit current and makes the mechanism Tripping, to prevent the burning of wires and load equipment before it happens; the arc extinguishing part, which has a fixed contact that is in contact with / separated from the movable contact, is used to extinguish the arc caused by cutting off the large current; and In the substantially rectangular parallelepiped frame in which the above components are integrated, the functional margin, quality, and manufacturing cost of each part wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H73/02
CPCH01H1/50H01H71/0214H01H2009/0088
Inventor 千种真一
Owner MITSUBISHI ELECTRIC CORP