Circuit breaker and power distribution box

Patent metadata

Field	Value
Publication number	US-12308191-B2
Application number	US-202217981215-A
Country	US
Kind code	B2
Filing date	Nov 4, 2022
Priority date	May 8, 2020
Publication date	May 20, 2025
Grant date	May 20, 2025

Abstract

This application discloses example circuit breakers and power distribution boxes, and relates to the field of communication device technologies. One example circuit breaker includes a housing, a control apparatus, a current signal collection mechanism, an operating mechanism, and a contactor mechanism that are disposed in the housing. The current signal collection mechanism has a first fixed contact and a second fixed contact that are electrically connected. The operating mechanism has a rotating part and a first moving contact. The first moving contact is electrically connected to a first electrode cable inlet port of the circuit breaker. Rotating the rotating part may make a circuit between the first moving contact and the first fixed contact connected/disconnected.

First claim

What is claimed is:

1. A circuit breaker, comprising:
a housing, a current signal collection mechanism, an operating mechanism, a contactor mechanism, cable inlet ports, cable outlet ports, and a control apparatus, wherein:
the current signal collection mechanism, the operating mechanism, and the contactor mechanism are disposed in the housing;
the current signal collection mechanism comprises a first fixed contact and a second fixed contact, and the first fixed contact is electrically connected to the second fixed contact;
the cable inlet ports are connected to a power supply line and comprise a first electrode cable inlet port and a second electrode cable inlet port;
the operating mechanism has a rotating part and a first moving contact, the first moving contact is electrically connected to the first electrode cable inlet port, and the rotating part is configured to drive the first moving contact to rotate, wherein rotating causes a circuit between the first moving contact and the first fixed contact to become connected or disconnected;
the cable outlet ports are connected to a power receiving line and comprise a first electrode cable outlet port and a second electrode cable outlet port, the first electrode cable outlet port is electrically connected to a second moving contact, and the second electrode cable outlet port is electrically connected to the second electrode cable inlet port; and
the control apparatus is configured to control the contactor mechanism to drive the second moving contact to move, wherein moving causes a circuit between the second moving contact and the second fixed contact to become connected or disconnected.

2. The circuit breaker according to claim 1 , wherein:
the circuit breaker further comprises a signal port, and a signal terminal is disposed in the signal port; and
the control apparatus is a signal circuit board, the signal circuit board is inserted into the signal port, and the signal terminal is connected to the signal circuit board by using a signal.

3. The circuit breaker according to claim 2 , wherein a limiting structure is disposed in the signal port, a notch is disposed at an end of the signal circuit board, and the limiting structure is inserted into the notch.

4. The circuit breaker according to claim 2 , wherein:
the circuit breaker further comprises an arc extinguishing mechanism, and the first fixed contact and the second fixed contact of the current collection mechanism is electrically connected to the arc extinguishing mechanism; and
when the circuit breaker further comprises the signal port, and the signal terminal is disposed in the signal port, the arc extinguishing mechanism is electrically connected to the signal terminal.

5. The circuit breaker according to claim 1 , wherein, at least one of the following:
the control apparatus is further configured to:
detect current intensity at the first fixed contact; and
when the detected current intensity falls within a preset current intensity threshold range, determine that the circuit between the first fixed contact and the first moving contact is connected; or
when the detected current intensity exceeds a preset current intensity threshold range, determine that the circuit between the first fixed contact and the first moving contact is disconnected; or

the control apparatus is further configured to:
detect current intensity at the second fixed contact; and
when the detected current intensity falls within a preset current intensity threshold range, determine that the circuit between the second fixed contact and the second moving contact is connected; or
when the detected current intensity exceeds a preset current intensity threshold range, determine that the circuit between the second fixed contact and the second moving contact is disconnected.

6. The circuit breaker according to claim 1 , wherein:
the circuit breaker further comprises a short-circuit protection mechanism, the short-circuit protection mechanism is disposed on one side of the operating mechanism, the short-circuit protection mechanism comprises an electromagnetic coil, an iron core, a shaft, an armature spring, and an armature, the electromagnetic coil is sleeved on the iron core, the armature spring is sleeved on the shaft, and the armature is fixedly connected to the armature spring, one end of the electromagnetic coil is electrically connected to the second moving contact through a conductor, and the other end of the electromagnetic coil is electrically connected to the first electrode cable outlet port; and
when a current flowing through the electromagnetic coil exceeds a preset current threshold range, electromagnetic force generated by the electromagnetic coil attracts the armature to rotate around the shaft, and the armature pushes the rotating part to rotate, wherein the rotation of the rotating part causes the circuit between the first moving contact and the first fixed contact to be disconnected.

7. The circuit breaker according to claim 1 , wherein:
the circuit breaker further comprises an overload protection mechanism, and the overload protection mechanism is made of a material that can bend and deform when subjected to heat, and one end of the overload protection mechanism is rigidly connected to the first electrode cable inlet port; and
when heat generated in the power receiving line exceeds a preset heat threshold range, the overload protection mechanism deforms and drives the rotating part of the operating mechanism to rotate, wherein the rotation of the rotating part of the operating mechanism causes the circuit between the first moving contact and the first fixed contact to be disconnected.

8. The circuit breaker according to claim 7 , wherein:
a first sliding slot is disposed on the rotating part of the operating mechanism, and a first connecting rod is disposed between the overload protection mechanism and the operating mechanism; and
one end of the first connecting rod is hinged to the overload protection mechanism, and the other end of the first connecting rod configured to slide along the first sliding slot.

9. The circuit breaker according to claim 8 , wherein a connecting part is disposed on an inner sidewall of the housing, a second sliding slot is disposed on the connecting part, and a hinge point between the first connecting rod and the overload protection mechanism is configured to slide along the second sliding slot.

10. The circuit breaker according to claim 1 , wherein the circuit breaker further comprises a button mechanism, and movement of the button mechanism is configured to drive the rotating part of the operating mechanism to rotate, wherein rotation of the rotating part of the operating mechanism causes the circuit between the first fixed contact and the first moving contact to be connected or disconnected.

11. The circuit breaker according to claim 10 , wherein:
the button mechanism comprises a button, a rotating shaft, and a second connecting rod, one end of the second connecting rod is fastened to an edge of the rotating shaft, and the other end of the second connecting rod is fastened to an edge of the rotating part of the operating mechanism; and
when the button moves towards an interior of the housing, rotation of the rotating shaft drives the second connecting rod to rotate, and the rotating part rotates with the second connecting rod, wherein rotation of the rotating part with the second connecting rode causes the circuit between the first fixed contact and the first moving contact to be connected; or
when the button moves towards an exterior of the housing, rotation of the rotating shaft drives the second connecting rod to rotate, and the rotating part rota

Assignees

• Huawei Digital Power Tech Co Ltd

Inventors

• Liang Zehua
• Guo Wei
• Yang Yanxing

Classifications

• H02G3/08

  Distribution boxes; Connection or junction boxes · CPC title

• H01H71/02

  Housings; Casings; Bases; Mountings · CPC title

• H01H50/045

  Details particular to contactors (H01H50/042 takes precedence) · CPC title

• H01H3/46

  using rod or lever linkage, e.g. toggle · CPC title

• H01H71/2472

  with rotatable armatures · CPC title