Abstract: An inside locking device of a flat handle lock includes an inner handle unit having a fixing disk provided with a sleeve for combination with an inner handle having an elongated shank. The sleeve has an inside provided with a bottom plate, an unlocking plate, a first elastic member, a control cylinder, and a push button. The unlocking plate is received in the control cylinder, and has at least one ear plate locked in at least one guide slot of the control cylinder. The control cylinder is provided with a protruding plate that is locked in a straight slot formed in the sleeve, and the other end of the control cylinder is combined with the push button. The push button protrudes outward from the hole provided in the inner handle.

Abstract: An inside locking device of a flat handle lock includes an inner handle unit having a fixing disk provided with a sleeve for combination with an inner handle having an elongated shank. The sleeve has an inside provided with a bottom plate, an unlocking plate, a first elastic member, a control cylinder, and a push button. The unlocking plate is received in the control cylinder, and has at least one ear plate locked in at least one guide slot of the control cylinder. The control cylinder is provided with a protruding plate that is locked in a straight slot formed in the sleeve, and the other end of the control cylinder is combined with the push button. The push button protrudes outward from the hole provided in the inner handle.

Abstract: A lock for various door thicknesses comprises a latch bolt, a chassis, an inner spindle, an outer spindle, a retractor, and an outer handle assembly. The outer handle assembly comprises an outer rose liner, an outer rose, a ring threadedly engaged with the chassis, a gear meshed with the ring, and an outer handle. When the retractor is not aligned with a hook of the latch bolt during installation of the lock, a tool is extended through the outer rose liner into a non-circular hole of the gear to thereby turn the gear and the ring, thereby causing the ring to move relative to the outer tubular member and causing the outer rose liner and the outer rose to move relative to the chassis along a longitudinal direction of the chassis until the retractor is aligned with and engageable with the hook of the latch bolt.