Microswitch
AssigneeOmron Tateisi Electronics Co.
InventorsToyohiro Nagahara, Takashi Niwa, Takezo Sano, Isao Kato
Life of this patent
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Abstract
A microswitch in which a good snap action feeling is obtained and an operating stroke is enhanced is provided. A compession spring is interposed between a movable member and a swingable lever which are respectively pivotaly supported at close positions. The swingable lever is operated by a push button which is vertically slidable. Further, restricting plates to restrict the motion in the width direction of the movable member are attached to the push button. A positioning member to hold the swingably lever to the position which faces the push button when the microswitch is assembled is also provided.
Claims4
A microswitch comprising:
- a switch casing in which a first common terminal member and at least one second terminal member for fixed contact are fixed to a lower plate portion;
- a hole formed in a top plate of the switch casing located between inner end portions of said first common terminal member and said second terminal member for fixed contact;
- a push button which is vertically movably inserted into said hole;
- a movable member provided with a movable contact at a free end portion thereof and pivotally supported at the inner end portion of the first common terminal member at a base end portion thereof, said movable contact facing a fixed contact fixed to the inner end portion of the second terminal member,
- a swingable lever pivotally supported at the inner end portion of the first common terminal member at a base end portion thereof and operated by said push button at a free end thereof wherein
- said push button is capable of moving towards a space located between the base end portion of said swingable lever and the free end portion of said movable member;
- and
- a compression spring, one end of which is pivotally engaged with a central portion of said swingable lever and another end of which is engaged with a free end portion of said movable member.
Dependencies are inferred from the claim text.