Patent ID: 6644077
Filing Date: 2003-11-11
Classification: E05B,Y10T

Abstract:
A lock structure for bathroom use, comprising an inner rose (10), an outer rose (20), an inner unlatching mechanism (50), and an outer unlatching mechanism (40), an inner spindle (12) rotatably extending through the inner rose, with an inner handle (11) being attached to the inner spindle to turn therewith, an outer spindle (22) rotatably extending through the outer rose, with an outer handle (21) being attached to the outer spindle to turn therewith, the inner unlatching mechanism (50) comprising:an inner unlatching rod (51) having a non-circular section, the inner unlatching rod (51) being operably connected to the outer unlatching mechanism (40); a fixing member (52) fixed to the inner rose (10) and mounted around the inner unlatching rod (51), the fixing member (52) including a first side, a second side, and a central hole (521) through which the inner unlatching rod (51) rotatably extends, an unlatching groove (522) being defined in the first side of the fixing member and tapering to the central through-hole (521), the unlatching groove (522) being delimited by a truncated conic wall (524), a locking groove (523) being defined in an end edge of the first side of the fixing member and spaced from the unlatching groove (522), the locking groove (523) having a depth along a longitudinal direction of the inner unlatching rod (51) not equal to a depth of the unlatching groove (522) along the longitudinal direction of the inner unlatching rod; a locking wheel (53) mounted to the inner unlatching rod (51) to turn therewith, the locking wheel (53) including an engaging block (531) for selectively engaging with one of the unlatching groove (522) and the locking groove (523) of the fixing member (52), the locking wheel (53) further including an arcuate drive portion (532) on an outer periphery thereof; and a follower wheel (55) securely mounted around the inner spindle (12) to turn therewith, the follower wheel (55) including a notch (551) for releasably engaging with the arcuate drive portion (532) of the locking wheel (53); wherein when in a locked state, the engaging block (531) of the locking wheel (53) is engaged in the locking groove (523) of the fixing member (52), and the arcuate drive portion (532) of the locking wheel (53) is engaged in the notch (551) of the follower wheel (55), with the outer unlatching mechanism (40) being in a state not allowing rotational movement of the outer spindle (22) and the outer handle (21); and wherein when the inner handle (11) is turned to turn the inner spindle (22) through 40-60 degrees, the engaging block (531) of the locking wheel (53) is moved into the unlatching groove (522) of the fixing member (52), and the arcuate drive portion (532) of the locking wheel (53) is disengaged from the notch (551) of the follower wheel (55).