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Wire Form, Self-Restoring Torsional Latch

IP.com Disclosure Number: IPCOM000047900D
Original Publication Date: 1983-Dec-01
Included in the Prior Art Database: 2005-Feb-08
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Cauchy, MJ: AUTHOR [+2]

Abstract

This article describes a simple and inexpensive self-restoring torsional latch in which the latching action is provided by a wire restrained at one end but rotatable at the other. Referring to the drawing, the latch includes a wire 10 which is restrained at one end by a pair of ribs 12 and 14 in one wall of a base structure 16. The opposite end of the wire 10 is coupled to a knob 18 which is journaled in the opposite wall of the base structure. The journaled end can be rotated between a latched position 20 and an unlatched position 22. The base structure includes a preferably integral beam spring 24. The wire 10 is capable of retaining a catch 26 for a cover (not shown). The catch 26 is shown both in its retained position and (in dotted outline form) in its free position.

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Wire Form, Self-Restoring Torsional Latch

This article describes a simple and inexpensive self-restoring torsional latch in which the latching action is provided by a wire restrained at one end but rotatable at the other. Referring to the drawing, the latch includes a wire 10 which is restrained at one end by a pair of ribs 12 and 14 in one wall of a base structure
16. The opposite end of the wire 10 is coupled to a knob 18 which is journaled in the opposite wall of the base structure. The journaled end can be rotated between a latched position 20 and an unlatched position 22. The base structure includes a preferably integral beam spring 24. The wire 10 is capable of retaining a catch 26 for a cover (not shown). The catch 26 is shown both in its retained position and (in dotted outline form) in its free position. The catch includes a shoulder 28 and a camming surface 30. When the handle 18 is in the latch position 20, the shoulder 28 is biased against the wire 10 by upward pressure of beam spring 24. When the handle 18 is rotated to unlatch position 22, the offset segment of wire 10 pivots free of the shoulder 28. Once catch 26 is free, the handle 18 can be released. The stored torsional energy in the wire 10 causes the wire to return to the latched position 20. When a user presses the cover down, the camming surface 30 pushes the wire aside until it clears the shoulder
28. The stored torsional energy in the wire 10 causes the wire to return to its latched positi...