Molded case circuit breaker

Patent metadata

Field	Value
Publication number	US-9754751-B2
Application number	US-201514981670-A
Country	US
Kind code	B2
Filing date	Dec 28, 2015
Priority date	Mar 11, 2015
Publication date	Sep 5, 2017
Grant date	Sep 5, 2017

Abstract

Disclosed is a molded case circuit breaker including a case configured to accommodate an element for trip, an upper cover detachable attached to the case, a dial configured to include a fixing plate, which is provided to protrude along an outer circumference surface thereof, and a first stopper disposed under the fixing plate, a crossbar moved by the dial, a first dial fitting hole provided in the upper cover for the dial to be fitted into the first dial fitting hole, and a dial rotation adjusting unit provided in the first dial fitting hole and fitted between the fixing plate and the first stopper to guide a rotation of the dial, the dial rotation adjusting unit including a plurality of fitting grooves arranged at certain intervals. The first stopper is fitted into and fixed to the plurality of fitting grooves according to the rotation of the dial.

First claim

What is claimed is:

1. A molded case circuit breaker comprising:
a case configured to accommodate an element for trip;
an upper cover detachably attached to the case;
a dial configured to include a fixing plate, which is provided to protrude along an outer circumference surface thereof, and a first stopper disposed under the fixing plate;
a crossbar moved by the dial;
a first dial fitting hole provided in the upper cover for the dial to be fitted into the first dial fitting hole;
a dial rotation adjusting unit provided in the first dial fitting hole and fitted between the fixing plate and the first stopper to guide a rotation of the dial, the dial rotation adjusting unit including a plurality of fitting grooves arranged at certain intervals;
a moving bar disposed under the first stopper to move the crossbar according to the rotation of the dial;
a moving bar fitting hole provided in the first dial fitting hole for the moving bar to be fitted into the moving bar fitting hole as one body; and
a first stopper moving space provided between the first stopper and the moving bar,
wherein the first stopper is fitted into and fixed to at least one fitting groove of the plurality of fitting grooves according to the rotation of the dial; and
wherein a rotation guide plate is fitted between the fixing plate and the first stopper, and when the dial rotates, the first stopper is bent in a direction toward the moving bar.

2. The molded case circuit breaker of claim 1 , wherein
the dial rotation adjusting unit comprises the rotation guide plate provided to protrude to inside the upper cover and is fitted between the fixing plate and the first stopper to guide the rotation of the dial,
the plurality of fitting grooves are provided in the rotation guide plate to be spaced apart from each other by a certain interval.

3. The molded case circuit breaker of claim 1 , further comprising:
an auxiliary cover disposed on the upper cover;
a second stopper provided in the fixing plate;
a second dial fitting hole provided in the auxiliary cover to correspond to the first dial fitting hole; and
a moving groove provided in the second dial fitting hole for the second stopper to be fitted into the moving groove and moved,
wherein the moving groove is disposed to correspond to a portion except the moving bar fitting hole and a peripheral portion thereof.

4. The molded case circuit breaker of claim 3 , wherein the fitting groove is disposed to correspond to a lower side of the moving groove, and when the dial rotates with the auxiliary cover being coupled to the upper cover, the second stopper is moved in a state of being fitted into the moving groove, and simultaneously, the first stopper is fitted into and fixed to the fitting groove.

Assignees

• Lsis Co Ltd

Inventors

• Oh Kyunghwan

Classifications

• H01H71/7463

  Adjusting only the electromagnetic mechanism · CPC title

• H01H2071/7481

  with indexing means for magnetic or thermal tripping adjustment knob · CPC title

• H01H71/2463 Primary

  with plunger type armatures · CPC title

• H01H73/22

  having electrothermal release and no other automatic release (cartridge type H01H73/62) · CPC title

• H01H71/7427

  Adjusting only the electrothermal mechanism · CPC title