Miniature circuit breaker

Patent metadata

Field	Value
Publication number	US-11961690-B2
Application number	US-201917418324-A
Country	US
Kind code	B2
Filing date	Dec 24, 2019
Priority date	Dec 28, 2018
Publication date	Apr 16, 2024
Grant date	Apr 16, 2024

Abstract

A miniature circuit breaker, which includes a button mechanism, a circuit breaker housing, and a locking mechanism, wherein the button mechanism is arranged at one end of the circuit breaker housing and is in sliding fit with the circuit breaker housing, the locking mechanism includes a second locking member, the second locking member is pivotally arranged on the circuit breaker housing, the circuit breaker housing includes a second opening hole arranged on one side thereof, one end of the second locking member is in driving fit with the button mechanism, and the other end of the second locking member passes through the second opening hole and is in limit fit with a housing at an assembly position of the circuit breaker.

First claim

The invention claimed is:

1. A miniature circuit breaker, comprising:
a button mechanism,
a circuit breaker housing, and
a locking mechanism,
wherein the button mechanism is arranged at one end of the circuit breaker housing and is in sliding fit with the circuit breaker housing, the locking mechanism comprises a second locking member, the second locking member is pivotally arranged on the circuit breaker housing, the circuit breaker housing comprises a second opening hole arranged on one side thereof, one end of the second locking member is in driving fit with the button mechanism, and another end of the second locking member passes through the second opening hole and is in limit fit with a housing at an assembly position of the miniature circuit breaker; and when the button mechanism is pulled out of the circuit breaker housing, the button mechanism drives the second locking member to rotate, so that the second locking member is released from the housing at the assembly position of the miniature circuit breaker, and
wherein the button mechanism comprises a button head, a button body, and a first connecting rod, one end of the first connecting rod is inserted into the button body and is in driving fit with the second locking member, the button head is located on one side of the button body so that a user operates the button head, the first connecting rod is in transmission fit with the button body, and when the button mechanism is pulled out of the circuit breaker housing, the first connecting rod drives the second locking member to rotate, so that the second locking member is released from the housing at the assembly position of the miniature circuit breaker.

2. The miniature circuit breaker according to claim 1 , wherein the locking mechanism further comprises a second locking spring, the second locking member comprises a second locking member body, and a second locking member protrusion and a second locking member driving arm which are respectively arranged at two ends of the second locking member body, the second locking member body is pivotally installed on the circuit breaker housing, the second locking member driving arm is in driving fit with the first connecting rod, the second locking spring makes the second locking member protrusion pass through the second opening hole and protrude outside the circuit breaker housing, after the miniature circuit breaker is assembled to the assembly position of the miniature circuit breaker and installed in place, the second locking member protrusion passes through the second opening hole and is in limit fit with the housing at the assembly position of the miniature circuit breaker, when the button mechanism is pulled to move out of the circuit breaker housing, the first connecting rod drives the second locking member driving arm to rotate, so that the second locking member protrusion moves towards an inside of the circuit breaker housing, and the second locking member is released from the housing at the assembly position of the miniature circuit breaker.

3. The miniature circuit breaker according to claim 1 , wherein the first connecting rod is a U-shaped rod, a transmission rod installation table is arranged on the button body, the one end of the first connecting rod passes through the transmission rod installation table and forms a first transmission rod protruding from one side of the transmission rod installation table, the first transmission rod is in driving fit with the second locking member, and when the button mechanism is pulled out of the circuit breaker housing, the first transmission rod drives the second locking member to rotate, so that the second locking member is released from the housing at the assembly position of the miniature circuit breaker.

4. The miniature circuit breaker according to claim 1 , further comprising an operating mechanism, a short circuit protection mechanism, an arc extinguishing mechanism, an overload protection mechanism, a moving contact, and a static contact, wherein the button mechanism is drivingly connected with the operating mechanism, the operating mechanism is connected with the moving contact, the moving contact is matched with the static contact, and the short circuit protection mechanism and the overload protection mechanism are in driving fit with the operating mechanism respectively; and the button mechanism is arranged at the one end of the circuit breaker housing, the short circuit protection mechanism and the arc extinguishing mechanism are arranged at another end of the circuit breaker housing, the operating mechanism is arranged between the button mechanism and the short circuit protection mechanism, and the overload protection mechanism is arranged on one side of the operating mechanism and is located between the arc extinguishing mechanism and the button mechanism.

5. The miniature circuit breaker according to claim 4 , wherein the button mechanism is drivingly connected with the operating mechanism through the first connecting rod, when the button mechanism is pressed towards an inside of the circuit breaker housing, the button mechanism drives the operating mechanism to act through the first connecting rod, and the operating mechanism drives the moving contact to be connected with the static contact; and when the button mechanism is pulled out of the circuit breaker housing, the button mechanism drives the operating mechanism to act through the first connecting rod, and the operating mechanism drives the moving contact to be disconnected from the static contact.

6. The miniature circuit breaker according to claim 5 , wherein the operating mechanism comprises a transmission member, a second connecting rod, a catch member, a supporting member, and a buckle member, the transmission member and the supporting member are pivotally arranged on the circuit breaker housing respectively, the catch member and the buckle member are pivotally arranged on the supporting member respectively, the button mechanism is drivingly connected with the transmission member through the first connecting rod, the transmission member is drivingly connected with the catch member through the second connecting rod, the supporting member is connected with the moving contact, and the catch member is in catch fit with the buckle member; and when the miniature circuit breaker is in the switching-off state, the button mechanism is pressed, the button mechanism drives the operating mechanism to act through the first connecting rod, the supporting member drives the moving contact to be connected with the static contact, the miniature circuit breaker enters a switching-on state, the button mechanism is pulled, the button mechanism drives the catch member to rotate through the first connecting rod, the catch member drives the operating mechanism to act, the supporting member drives the moving contact to be disconnected from the static contact, and the miniature circuit breaker enters a switching-off state.

7. The miniature circuit breaker according to claim 4 , wherein the button mechanism is drivingly connected with the operating mechanism through the first connecting rod, when the button mechanism is pressed into the circuit breaker housing, the button mechanism drives the operating mechanism to act through the first connecting rod, and the operating mechanism drives the moving contact to be connected with the static contact; the operating mechanism further comprises a switching-off rod, the switching-off rod comprises a switching-off rod connecting end and a switching-off rod driving end, the switching-off rod connecting end is connected with the button mechanism, and the switching-off rod driving end is in driving fit with the operating mechanism; and when the miniature circuit breaker is in a switching-on state, the button mecha

Assignees

• Zhejiang Chint Electrics Co Ltd

Inventors

• Lu Kejun
• Gu Xiangyi

Classifications

• H01H71/58 Primary

  actuated by push-button, pull-knob, or slide · CPC title

• H01H9/20 Primary

  Interlocking, locking, or latching mechanisms · CPC title

• H01H71/0207

  Mounting or assembling the different parts of the circuit breaker · CPC title

• H01H71/1009

  Interconnected mechanisms (H01H71/1045 takes precedence; operated by excess current and other electrical conditions H01H83/20) · CPC title

• H01H71/10 Primary

  Operating or release mechanisms · CPC title