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Contact mechanism and switch using same

A contact mechanism and moving contact technology, applied in the contact surface shape/structure, electrical switch, high voltage/high current switch, etc., can solve the problems of easy heating, increased resistance, short contact life, etc. The effect of heat generation, long life and extended contact life

Active Publication Date: 2021-09-24
ORMON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in the above-mentioned contact mechanism, when the above-mentioned movable contact 17 is separated from the above-mentioned fixed contact 16, the arc generated from the specific surface area of ​​the contact surface that is initially separated has a surface area. Arc persists
Therefore, only the specific surface area is burnt by the arc, and the surface is fluffed. Therefore, when the specific surface areas are in contact with each other, the resistance increases, and there is a problem that not only heat is easily generated, but also the life of the contact is shortened.

Method used

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  • Contact mechanism and switch using same
  • Contact mechanism and switch using same
  • Contact mechanism and switch using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0096] The trigger switch of the first embodiment was used as a sample. Then, when a current of 42V and 130A is passed, the arc generated when the movable contact 37a for switching and the fixed contact 35a for switching are contacted by the magnetic force of the permanent magnet 28 is extended in a direction that is less likely to touch the resin molded product. , to measure the number of occurrences of arcs and the duration of arcs when the contacts are closed. put the measurement results in the Figure 12 is represented by a shaded bar in the graph.

[0097] In addition, in Example 1, the direction in which the arc at the time of contact closing is less likely to hit the resin molded product means that the arc generated at the time of contact closing goes along the movable contact piece 37 for switching and toward the movable contact piece for switching. 37 directions of rotation fulcrum elongation.

Embodiment 2

[0105] The trigger switch of the first embodiment was used as a sample. Moreover, by passing the current of 42V and 130A, the arc generated when the movable contact 37a for switching and the fixed contact 35a for switching are brought into contact with each other by the magnetic force of the permanent magnet 28 is less likely to touch the resin molded product. The direction is stretched, and a photo is taken of the contact surface after switching 100 times. The photographing results of fixed contacts for switches are shown in Figure 13 , Figure 14 , and the photographing results of the movable contact for the switch are shown in Figure 15 , Figure 16 .

Embodiment 3

[0113] The trigger switch of the first embodiment was used as a sample. Then, a current of 42 V and 130 A was passed, and the number of times of switching until contact welding occurred was measured.

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Abstract

An object of the present invention is to provide a contact mechanism that does not increase the resistance and has a long contact life. Therefore, the contact mechanism is composed of the fixed contact (35a) for switching and the movable contact (37a) for switching facing it, and the arc generated between the fixed contact and the movable contact is extended in a predetermined direction. of permanent magnets. In particular, the arc (A1) generated from the contact surface area (35d, 37b) of the above-mentioned fixed contact point (35a) for switching and the movable contact point (37a) for switching is generated by the magnetic force (B) of the above-mentioned permanent magnet. The electric arc (A1) is extended to move to the non-contact surface area (35e, 37c) where the fixed switch contact (35a) and the switch movable contact (37a) do not contact.

Description

technical field [0001] The present invention relates to a contact mechanism, and more particularly to a contact mechanism for solving defects caused by arc generation when separating contacts. Background technique [0002] At present, as a contact mechanism, for example, there is a mechanism used in the following device, that is, "a power conversion device characterized by including: an inverter circuit that converts the output of a DC power supply into AC and supplies it to a load. part, a DC circuit breaker that is inserted into a contact part of the circuit between the DC power supply and the inverter circuit part and interrupts the power supply to the inverter circuit part, the DC circuit breaker is composed of a switch and a permanent magnet, and the The switch makes the contact part contact or separate according to the operation of the operation part; the permanent magnet is arranged on the outside of the switch main body in the manner of being located on both sides of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H9/44H01H1/06H01H13/02
CPCH01H9/06H01H9/063H01H9/443H01H1/10H01H9/302H01H13/186H01H33/182H01H50/546
Inventor 小山泰基名化诚高见幸二
Owner ORMON CORP
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