Patent ID: 6158788
Filing Date: 2000-12-12
Classification: E05B,Y10S,Y10T

Abstract:
In a door lock device:(a) a base frame having an engaging portion for engaging a striker;(b) a rotatable latch member mounted on said base frame;(c) an engaging member mounted on said base frame for engaging said latch member; and(d) a cable;(e) an operating member mounted on said base frame and linked with an operating part by said cable, said operating member being switchable among three positions, an unlocked position, a locked position and a released position, by movement of said cable to place said engaging member selectably in one of an unlocked condition, a locked condition and a released condition, respectively;(f) said operating member being interlocked with said engaging member so that when said operating member is in the released position, said latch member is disengaged from said engaging member, and when said operating member is in any of the other said positions, said latch member is engaged with said engaging member;the improvement in said door lock device comprising;(g) a switching member activated solely by an operation handle;(h) said operating member and said engaging member being in interlocking relationship and providing said switching member with movement back and forth between the unlocked position facing a portion of said engaging member and the locked position for maintaining the locked condition of the engaging member;(i) said switching member having a pin for interlocking with said operating member, said operating member having a guide portion for switching the pin between the unlocked position and the locked position by moving said pin when said operating member moves between the unlocked position and the locked position, and a releasing portion to terminate said interlocking with said pin when said operating member moves between the unlocked position and the released position, said guide portion of said operating member being formed as an elongated groove having a side juide face formed on each side thereof, said elongated groove being disposed in an oblique direction that crosses an arc having a radius with its center at a center of rotation of said operating member whereby, when said operating member is rotated, said pin being provided on the switching member is moved along each of said two guide faces alternately to switch the pin between the unlocked position and the locked position.