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Title:
PROXIMITY SWITCH
Document Type and Number:
Japanese Patent JP2007012376
Kind Code:
A
Abstract:

To provide a proximity switch wherein output variation of a magnetic sensor is steep regardless of the moving speed of a mobile body used as a movement detection object and which can thereby stably execute on/off changeover.

A slider 52 having further entered into a casing 12 presses a movable part 26 at its one end. However, the movable part 26 is energized toward a plate part 22 by energizing force of a return spring 38 resisting its spring force. Thereby, even if pressing force from the slider 52 is given to the movable part 26, the movable part 26 can not move to the plate 18 side and bent. When the spring force of the movable part 26 increased by the bending and the pressing force from the slider 52 exceed the energizing force of the return spring 38, the movable part 26 tends to rapidly restore (stretch) its shape. Thereby, the tip side of the movable part 26 rapidly moves toward the plate part 18 and a permanent magnet 30 rapidly approaches the magnetic sensor 32.


Inventors:
Muraki, Kinji
Itoigawa, Koichi
Application Number:
JP2005000190205
Publication Date:
January 18, 2007
Filing Date:
June 29, 2005
Export Citation:
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Assignee:
TOKAI RIKA CO LTD
International Classes:
H01H15/18; H01L43/06; H01L43/08
Domestic Patent References:
JPH0528878A
JP2001297662A
JPH0346721A
JPH03196428A
JPS5418081A
JPS5511062U
Attorney, Agent or Firm:
中島 淳
加藤 和詳
西元 勝一
福田 浩志