Patent ID: 6623053
Filing Date: 2003-09-23
Classification: E05B,Y10T

Abstract:
An inside locking device of a flat handle lock, comprising:an outer handle unit, having a fixing disk provided with a rotatable outer handle, the outer handle capable of driving a drive tube to rotate, the outer handle unit having a lock core set that may drive a lock control plate to rotate; and an inner handle unit, having a fixing disk provided with a sleeve, the sleeve having an inside provided with a bottom plate, the outer handle having an elongated shank being combined on the sleeve, the inside of the sleeve receiving an unlocking plate, a first elastic member, a control cylinder, and a push button, one end of the push button protruding outwards from a hole provided in the inner handle, the unlocking plate being received in the control cylinder from one end of the control cylinder, the unlocking plate having a drive hole for passage of one end of the lock control plate, the unlocking plate being provided with at least one ear plate locked in at least one guide slot of the control cylinder, the guide slot having two ends each having an annular groove parallel with the end of the control cylinder, the control cylinder being provided with a protruding plate that is locked in a straight slot formed in the sleeve, the other end of the control cylinder being combined with the push button, one end of the first elastic member being rested on the unlocking plate, and the other end of the first elastic member pushing a wall of an inner end of the control cylinder.