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Title:
ELECTROMAGNETIC PULL-OUT DEVICE AND CIRCUIT BREAKER
Document Type and Number:
Japanese Patent JP2017027710
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an electromagnetic pull-out device that can suppress a magnetic flux leaking from the gap between a pole head and an armature, and a circuit breaker using the same.SOLUTION: A plunger 2 and a damping spring 3 are arranged inside a cylinder 1 which is formed in a cylindrical shape to be bottomed. A pole head 4 closes the opening of the cylinder 1. An electromagnetic coil 5 is wound around the cylinder 1. A yoke 6 has a first piece 6a and a second piece 6b which are arranged along the axial direction of the cylinder 1. An armature 7 is supported by the yoke 6 so as to be rotatable between a first position where the armature 7 is in contact with the pole head 4 and a second position where the armature 7 is away from the pole head 4. A magnetic shielding piece 9 is provided to the pole head 4 and arranged at a side of the armature 7. The armature 7 is rotatable within a range where the armature 7 does not protrude from the magnetic shielding piece 9 in the axial direction of the cylinder 1 in side view.SELECTED DRAWING: Figure 1

Inventors:
MURAKAMI HIROAKI
OKADA KENJI
NISHIHARA SHINO
Application Number:
JP2015143485A
Publication Date:
February 02, 2017
Filing Date:
July 17, 2015
Export Citation:
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Assignee:
PANASONIC IP MAN CORP
International Classes:
H01H73/36
Attorney, Agent or Firm:
Keisei Nishikawa
Takeshi Sakaguchi
Hidetoshi Kitade
Nakaishi Haruki