Browse Prior Art Database

Buckling Torsional Snap Actuator

IP.com Disclosure Number: IPCOM000049405D
Original Publication Date: 1982-Apr-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Baumeister, HK: AUTHOR [+2]

Abstract

A buckling spring torsional snap actuator is shown in U.S. Patent 4,118,611. The drawing shows a schematic cross section taken through one switch actuator of this type.

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Buckling Torsional Snap Actuator

A buckling spring torsional snap actuator is shown in U.S.

Patent 4,118,611. The drawing shows a schematic cross section taken through one switch actuator of this type.

A potential failure condition exists with some mechanisms of this type if, due to variations in tolerances, the buckling spring 1 does not exert sufficient force about the fulcrum point 2 to cause the rocking plate 3 to rotate clockwise. A small projection 4 in the shape of a ramp has been added to the buckling spring mechanism by attaching a projection to the pivot plate 3, as shown. When spring 1 buckles, as shown in the phantom lines, the knee of the spring will abut the surface 5 of the force transferring projection 4. This will prevent the spring from buckling further and will increase the forces applied against the pivot plate 3 in the clockwise direction, thus assuring a positive and reliable pivot action.

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