Circuit breaker

Patent metadata

Field	Value
Publication number	US-9978551-B2
Application number	US-201615351932-A
Country	US
Kind code	B2
Filing date	Nov 15, 2016
Priority date	Nov 23, 2015
Publication date	May 22, 2018
Grant date	May 22, 2018

Abstract

A circuit breaker having a first micro switch, a second micro switch and a transmission mechanism. The transmission mechanism drives the first micro switch and the second micro switch, which are arranged in a circuit breaker shell. The first micro switch and the second micro switch are arranged on one side of the shell side by side, and a corresponding first transmission rod and a corresponding second transmission rod in the transmission mechanism respectively drive the first micro switch and the second micro switch. Since the circuit breaker is provided with no external device, the space occupied by the circuit breaker is reduced, thereby facilitating construction and installation. Since the two micro switches are built-in side by side, different signals can be simultaneously output.

First claim

What is claimed is:

1. A circuit breaker comprising:
a circuit breaker shell;
a first micro switch arranged in the circuit breaker shell;
a second micro switch arranged in the circuit breaker shell, wherein the first micro switch and the second micro switch are arranged side by side on one side of the circuit breaker shell; and
a transmission mechanism configured to drive the first micro switch and the second micro switch, the transmission mechanism including
a handle,
a first rotating shaft,
a first transmission rod rotatable around the first rotating shaft and configured to move between a first position in which the first transmission rod does not trigger a contact of the first micro switch and a second position in which the first transmission rod triggers the contact of the first micro switch,
a rotary pin having a first rotary position in which the circuit breaker is in an open state, a second rotary position in which the circuit breaker is in a tripping state, and a third rotary position in which the circuit breaker is in a closed state,
an armature configured to push the rotary pin from the first rotary position to the second rotary position, wherein the rotary pin pushes the first transmission rod to rotate around the first rotating shaft from the first position to the second position as the rotary pin moves from the first rotary position to the second rotary position, and
an alarm circuit including a coil, wherein a current flows through the coil to generate a magnetic force when there is a fault in the circuit, and the magnetic force triggers the armature to push the rotary pin from the first rotary position to the second rotary position.

2. The circuit breaker of claim 1 , wherein the first micro switch is an alarm switch, and when the first transmission rod is in the second position, the first transmission rod triggers the contact of the alarm switch to output an alarm signal.

3. The circuit breaker of claim 2 , wherein
when the handle is in an open position, the first transmission rod is in a first alarm position and the rotary pin is in the first rotary position; and
when the rotary pin is in the first rotary position, the position of the handle is constrained by the rotary pin and the alarm circuit is in an on state.

4. The circuit breaker of claim 3 , wherein when the rotary pin is in the second rotary position, a constraint on the position of the handle is removed, and the alarm circuit is in an off state.

5. The circuit breaker of claim 4 , wherein the transmission mechanism further comprises a fixing part, and when the handle is not constrained by the rotary pin, the handle is fixed by the fixing part in a tripping position.

6. The circuit breaker of claim 5 , wherein when the handle arrives at a closed position from the tripping position by a manual operation, the handle brings the rotary pin into the third rotary position from the second rotary position;
when the rotary pin is in the third rotary position, the position of the handle is constrained by the rotary pin, and the alarm circuit is in the off state; and
when the rotary pin is in the third rotary position, the rotary pin does not provide a thrust for the first transmission rod, and the first transmission rod rotates back to the first alarm position from a second alarm position under a resilient force of the contact of the alarm switch.

7. The circuit breaker of claim 6 , wherein when the handle arrives at the open position from the closed position by the manual operation, the handle brings the rotary pin into the first rotary position from the third rotary position.

8. The circuit breaker of claim 1 , wherein the second micro switch is an auxiliary switch, the transmission mechanism further comprises a linkage part and a second transmission rod, and the handle drives the second transmission rod through the linkage part, so that:
when the second transmission rod is in a first auxiliary position, the second transmission rod does not trigger the contact of the auxiliary switch; and
when the second transmission rod is in a second auxiliary position, the second transmission rod triggers the contact of the auxiliary switch, so that the auxiliary switch outputs an auxiliary signal.

9. The circuit breaker of claim 8 , further comprising a transmission part rotatable around a second rotating shaft, wherein when the handle is in the open position, the second transmission rod is in the second auxiliary position and pushes the transmission part to rotate around the second rotating shaft, so as to trigger the contact of the auxiliary switch.

10. The circuit breaker of claim 9 , wherein when the handle arrives at the tripping position from the open position, the second transmission rod arrives at the first auxiliary position from the second auxiliary position and does not provide a thrust for the transmission part any more, and the transmission part rotates around the second rotating shaft under the resilient force of the contact of the auxiliary switch and does not trigger the contact of the auxiliary switch.

11. The circuit breaker of claim 10 , wherein when the handle arrives at the closed position from the tripping position by a manual operation, the second transmission rod is in the first auxiliary position.

12. The circuit breaker of claim 11 , wherein when the handle arrives at the open position from the closed position by the manual operation, the handle drives the second transmission rod to arrive at the second auxiliary position from the first auxiliary position through the linkage part.

13. A circuit breaker comprising:
a first micro alarm switch;
a second micro auxiliary switch, wherein the first micro alarm switch and the second micro auxiliary switch are arranged side by side; and
a transmission mechanism for selectively driving the first micro alarm switch and the second micro auxiliary switch, the transmission mechanism including
a handle,
a first rotating shaft,
a first transmission rod rotatable around the first rotating shaft and configured to move between a first position in which the first transmission rod does not trigger a contact of the first micro alarm switch and a second position in which the first transmission rod triggers the contact of the first micro alarm switch, which outputs an alarm signal,
a linkage part,
a second transmission rod, wherein the handle moves the second transmission rod through the linkage part between a first auxiliary position in which the second transmission rod does not trigger a contact of the second micro auxiliary switch and a second auxiliary position in which the second transmission rod triggers the contact of the second micro auxiliary switch, which outputs an auxiliary signal; and
an alarm circuit including a coil, wherein a current flows through the coil to generate a magnetic force when there is a fault in the circuit, and the magnetic force triggers an armature configured to push a rotary pin from the first rotary position in which the circuit breaker is in an open state and a second rotary position in which the circuit breaker is in a tripping state, wherein the rotary pin pushes the first transmission rod to rotate around the first rotating shaft from the first position to the second position as the rotary pin moves from the first rotary position to the second rotary position.

14. A circuit breaker comprising:
a first micro switch;
a second micro switch, wherein the first micro switch and the second micro switch are arranged side by side; and
a transmission mechanism arranged to selectively drive the first micro switch and the second micro switch, wherein the transmission mechanism

Assignees

• Sensata Technologies Inc

Inventors

• Chen Jian
• Fu Jianjun
• Zhou Wei

Classifications

• H01H51/2236 Primary

  comprising pivotable armature, pivoting at extremity or bending point of armature (H01H51/2227 takes precedence) · CPC title

• H01H71/465 Primary

  Self-contained, easily replaceable microswitches · CPC title

• H01H9/167

  Circuits for remote indication · CPC title

• H01H71/04 Primary

  Means for indicating condition of the switching device {(by means of an auxiliary contact H01H71/46)} · CPC title

• H01H71/10

  Operating or release mechanisms · CPC title