Patent ID: 6568231
Filing Date: 2003-05-27
Classification: E05B,Y10T

Abstract:
A lock structure for bathroom use, the lock structure comprising:an outer rose (1), an outer handle (11) being pivotally mounted to the outer rose (1), an outer spindle (12) being connected to the outer handle (11) to turn therewith, a wheel (13) being mounted to the outer spindle (12) to turn therewith, the wheel (13) including an engaging groove (131), a pair of plates (14) being formed on the outer rose (1), a hole (17) being defined between the plates (14); an inner rose (2), an inner handle (21) being pivotally mounted to the inner rose (2), an inner spindle (22) being connected to the inner handle (21) to turn therewith, a drive wheel (23) and a follower wheel (24) being mounted on the inner-spindle (22) to turn therewith, an elastic element (21) being mounted on the inner spindle (22) for returning the inner handle (21), the follower wheel (24) including a notch (241), the inner rose (2) further including a hole (20); an inner unlatching mechanism (3) including an inner unlatching rod (31), a fixing member (32), and a locking wheel (33), the inner unlatching rod (31) being pivotally extended through the hole (20) of the inner rose (2), the fixing member (32) being fixed in the inner rose (2) and including a hole (321) through which the inner unlatching rod (31) extends, the fixing member (32) further including a first engaging notch (322) and a second engaging notch (323) shallower than the first engaging notch (322), the locking wheel (33) being mounted on the inner unlatching rod (31) to turn therewith, the locking wheel (33) including an engaging block (331) and a plurality of teeth (332), wherein when the engaging block (331) is engaged in the first engaging notch (322) of the fixing member (32), the locking wheel (33) is disengaged from the follower wheel (24), and wherein when the engaging block (331) is engaged in the second engaging notch (322) of the fixing member (32), the locking wheel (33) is engaged in the notch (241) of the follower wheel (24); and an outer unlatching mechanism (4) including an outer unlatching rod (41), an elastic element (42), a stop plate (43), and a locking plate (44), the outer unlatching rod (41) being pivotally extended through the hole (17) of the outer rose (1) and including a first end securely engaged with the inner unlatching rod (31) of the inner unlatching mechanism (3), the outer unlatching rod (41) further including a second end that is exposed outside the outer rose (1) and that has a drive portion (411), the locking plate (44) being mounted on the outer unlatching rod (41) to turn therewith, the stop plate (43) being mounted on the outer unlatching rod (41) and rotatable relative to the locking plate (44), the locking plate (44) including a first engaging groove (441) and a second engaging groove (442) shallower than the first engaging groove (441), the stop plate (43) including a protrusion (431) and being biased by the elastic element (42) of the outer unlatching mechanism (4) to be selectively engaged in one of the first engaging groove (441) and the second engaging groove (442) of the locking plate (44), wherein when the protrusion (431) of the stop plate (43) is engaged in the first engaging groove (441) of the locking plate (44), the stop plate (43) is partially located between the plates (14) on the outer rose (1) and engaged in the engaging groove (131) of the wheel (13), and wherein when the protrusion (431) of the stop plate (43) is engaged in the second engaging groove (442) of the locking plate (44), the stop plate (43) is received between the plates (14) on the outer rose (1) and disengaged from the engaging groove (131) of the wheel (13).