Test button loop device and circuit breaker

Patent metadata

Field	Value
Publication number	US-12504474-B2
Application number	US-202218557214-A
Country	US
Kind code	B2
Filing date	Aug 16, 2022
Priority date	Jan 21, 2022
Publication date	Dec 23, 2025
Grant date	Dec 23, 2025

Abstract

A test button loop device that includes an elastic button and a conductive member forming a test loop. The elastic button includes a contact portion matched with the conductive member, and a button member pressing the contact portion. The conductive member is linked with a handle mechanism or an operating mechanism or a moving contact of a circuit breaker, which drives the conductive member to approach the contact portion when the circuit breaker is closed, and the button member in this state can drive the contact portion to contact the conductive member to switch the test loop on. The handle mechanism or the operating mechanism or the moving contact of the circuit breaker drives the conductive member away from the contact portion when the circuit breaker is opened, and the button member in this state can will not be able to contact the conductive member.

First claim

The invention claimed is:

1 . A test button loop device, comprising an elastic button and a conductive member which form a test loop, wherein the elastic button comprises a contact portion matched with the conductive member, and a button member pressing the contact portion; the conductive member is in linkage with a handle mechanism or an operating mechanism or a moving contact of a circuit breaker; the handle mechanism or the operating mechanism or the moving contact of the circuit breaker drives the conductive member to approach the contact portion when the circuit breaker is closed, and the button member at this time is pressed to drive the contact portion to move and can contact the conductive member; and the handle mechanism or the operating mechanism or the moving contact of the circuit breaker drives the conductive member to move away from the contact portion when the circuit breaker is opened, and the button member at this time is pressed to drive the contact portion to move will not be able to contact the conductive member, wherein the conductive member is rotatably assembled in a shell of the circuit breaker, and a first end of the conductive member is in linkage with the handle mechanism or the operating mechanism or the moving contact of the circuit breaker, such that a second end of the conductive member moves close to the contact portion in a closed state, and moves away from the contact portion in an opened state, and wherein a limiting groove is formed in the shell, and the second end of the conductive member swings within the limiting groove.

2 . The test button loop device according to claim 1 , wherein a limiting boss is disposed in the shell and located above the second end of the conductive member, and the contact portion is in sliding fit with the limiting boss.

3 . The test button loop device according to claim 1 , wherein the inner sidewall of the shell is provided with a first limiting portion, the elastic button is provided with a second limiting portion, and the first limiting portion and the second limiting portion cooperate to limit a pressing stroke of the elastic button.

4 . The test button loop device according to claim 1 , wherein the test button loop device further comprising a test resistor, wherein the conductive member is electrically connected to a wiring terminal of the circuit breaker through the test resistor, and the contact portion is electrically connected to the other wiring terminal of the circuit breaker.

5 . The test button loop device according to claim 4 , wherein the conductive member comprises a torsion spring; a main body of the torsion spring is rotatably assembled in the shell; one end of the test resistor is connected to the main body of the torsion spring; both ends of the main body extend respectively to both sides of the main body to form the first end of the conductive member and the second end of the conductive member; and the first end of the conductive member is bent to form a ring structure, and the second end of the conductive member is bent towards one side of the shell.

6 . The test button loop device according to claim 1 , wherein the elastic button comprises a conductive spring pressed by the button member, one end of the conductive spring is electrically connected to the wiring terminal of the circuit breaker through a wire, and the other end of the conductive spring extends to one side to form the contact portion, and the contact portion is located above the conductive member.

7 . The test button loop device according to claim 6 , wherein the button member comprises an operating portion, a connecting portion and a pressing portion which are integrally formed; the operating portion is in sliding fit with a button hole of the shell and extends out of the shell; the connecting portion and the pressing portion are connected to one end of the operating portion located in the shell; the connecting portion extends in a direction parallel to a central axis of the button hole and is connected to one end of the conductive spring to press the conductive spring; the pressing portion extends in a direction perpendicular to the central axis of the button hole; the pressing portion is in limiting fit with the contact portion to press the contact portion; and a boss which serves as the second limiting portion is disposed to protrude from the middle of the pressing portion.

8 . The test button loop device according to claim 1 , wherein the operating mechanism comprises a lever, and a jump buckle and a lock buckle which are rotatably assembled on the lever; the jump buckle is in locking fit with the lock buckle; and a convex shaft is disposed on the lock buckle and is in linkage with the first end of the conductive member via the convex shaft.

9 . A circuit breaker, comprising a shell and at least two circuit breaker poles, wherein the test button loop device according to claim 1 is also disposed in the shell, one end of the test loop is connected to a wire incoming end of one circuit breaker pole, and the other end of the test loop is connected to a wire outgoing end of the other circuit breaker pole.

10 . The circuit breaker according to claim 9 , wherein the test button loop device and the handle mechanism of the circuit breaker are disposed at the upper part of the shell, the conductive member is rotatably assembled between the handle mechanism and the elastic button, and a test resistor is disposed on one side of the conductive member away from the elastic button.

Assignees

• Zhejiang Chint Electrics Co Ltd

Inventors

• Xia Xiaomin
• Chen Xiaohai
• Li Jie
• Wu Yanqiang

Classifications

• H01H71/12

  Automatic release mechanisms with or without manual release · CPC title

• G01R31/3275

  Fault detection or status indication · CPC title

• G01R31/3272 Primary

  Apparatus, systems or circuits therefor (G01R31/3275 takes precedence) · CPC title

• H01H13/14

  Operating parts, e.g. push-button · CPC title

• H01H13/02

  Details · CPC title