US 7,017,956 B2 · Lock mechanism and opening-closing device

Abstract

A lock mechanism includes a cam provided on one of a base member and a movable member and having a swing groove around a roughly heart-shaped projecting portion; a swing member pivotally provided on the other of the base member and the movable member and having a pin for tracing along the swing groove; and an auxiliary device provided on a side where the cam is disposed for contacting and separating from the swing member to restrict an unnecessary movement of the swing member while the pin is tracing the swing groove. In the lock mechanism, when the movable member is pushed against a force of an urging device, the movable member is locked at the first position through the swing groove and the pin. When the movable member is pushed again, the movable member is released and switched from the first position to the second position.

Claims9

Dependent claims

A lock mechanism for locking a movable member to a base member, comprising:

a cam fixed on the base member, and having a projection with a roughly heart shape and a swing groove formed around the projection,
a swing member provided on the movable member to move laterally and vertically relative to the cam, and having a tip and a pin close to the tip for tracing the swing groove, and
a spring member as auxiliary means provided on the base member and contacting the swing member while the pin is tracing the swing groove so that the auxiliary means allows the swing member to move properly, said spring member being located adjacent to the cam and contacting the tip of the swing member when the swing member is moved close to the projection, to thereby urge the swing member from one side of the projection toward the other side of the projection.

Dependencies are inferred from the claim text.

Lock mechanism and opening-closing device

Life of this patent

Lock mechanism and opening-closing device

Life of this patent

Abstract

Claims9