Title:
CIRCUIT BREAKER ARC EXTINGUISHING CHAMBER UNIT
Document Type and Number:
Japanese Patent JP2022096442
Kind Code:
A
Abstract:
To reliably hold a grid by an arc extinguishing plate without deforming the arc extinguishing plate.SOLUTION: A grid 2 is provided with locking pieces 21 to be locked to an arc extinguishing plate 3 on the left and right, and the locking piece 21 is provided with a step portion 4 whose tip is widened with respect to the base and to be locked to the arc extinguishing plate 3 in the middle. the arc extinguishing plate 3 is provided with an insertion hole 31a into which the locking piece 21 is inserted. The insertion hole 31a is composed of a through hole 5 and a tongue piece 6 formed adjacent to the through hole 5, and the tongue piece 6 is elastically deformed to expand the through hole 5. The width W1 of the through hole 5 is narrower than the width W2 of the tip of the locking piece 21, the width D1 of the insertion hole 31a is wider than the width W2, and the width W1 of the base of the locking piece 21 is slightly smaller than the width D2 of the opening. Due to elastic deformation of the tongue piece 6, the locking piece 21 can be inserted into the insertion hole 31a, and when the insertion of the locking piece 21 is completed, the tongue piece 6 elastically returns and the step portion 4 engages with the arc extinguishing plate 3.SELECTED DRAWING: Figure 5
Inventors:
SHIMIZU KEITA
Application Number:
JP2020209548A
Publication Date:
June 29, 2022
Filing Date:
December 17, 2020
Export Citation:
Assignee:
KAWAMURA ELECTRIC INC
International Classes:
H01H9/36; H01H73/18
Attorney, Agent or Firm:
Ishida Kiki