Abstract: A fire door lock includes a base assembly including first and second slide blocks, a locking control assembly including a movable seat forming a groove and a tongue control plate movably mounted to one side of the locking control assembly, and a winglet assembly including first and second winglets both having a boss movably received in the groove of the movable seat and both being respectively and rotatably coupled to the first and second slide blocks. Thus, when the movable seat is driven by a handle, the movable seat moves the first and second slide blocks to withdraw first and second latch bars to unlock the fire door and when the fire door is closed, the tongue control plate is actuated to allow the movable seat to return to the locked condition and the first and second latches and a tongue are stretched out to realize three-directional locking.

Abstract: The present invention provides a door handle apparatus consisting of a handle, a lock housing, a transmission mechanism, and a locking mechanism. The handle is pivotally engaged with the lock housing. The locking mechanism is engaged with one end of the lock housing and the handle. When the handle is rotated, the locking mechanism makes relative sliding and movement about the handle. The transmission mechanism is engaged with the other end of the lock housing and moves relative to the locking mechanism. The locking mechanism has a burglar free locking piece that prevents the door handle apparatus from being disassembled without being unlocked by a key first. After the door handle is engaged with the transmission mechanism, the door handle is still rotatable and movable via the lock housing.

Abstract: An unlock transmission mechanism for escape doors is disclosed, including a base, a transmission member, a first drive unit and a second drive unit, wherein the transmission member, the first drive unit and second drive unit are all disposed on the base, and the transmission member is actuated to move relative to the first drive unit and the second drive unit, respectively. In the case that the unlock transmission mechanism is to be installed in an escape door that has a different installation orientation, the transmission member and the first drive unit provided therein have the characteristics of multi-directional changeability, thereby enabling flexible installation of the escape door lock and eliminating the necessity to replace an existing door handle mechanism as encountered in the prior art.

Abstract: A push handle locking mechanism for a fire-blocking door lock structure is disclosed, including a handle frame member and a push handle mounted in the handle frame member. The push handle locking mechanism consists of a fixing base installed in the frame member for connecting with the push handle and having a related-actuation portion; a pressing member pivotally disposed on the fixing base for pressing the related-actuation portion; an unlatched maintaining member movably disposed on the fixing base; and a first latching assembly and a second latching assembly disposed on the fixing base corresponding to the second and third positioning portions to selectively restrict the displacement path of the unlatched maintaining member. The unlatched member is movably disposed on the fixing base to eliminate a welding problem known in the prior art, and, further, the first and second latching assemblies provide optional usage as desired.

Abstract: A transmission device for a fireproofing door lock, comprises a lock shell assembly, a driving mechanism having an elastic sliding member and a shaft, an actuating mechanism for pushing the driving mechanism, and a locking mechanism selectively latching and restricting the elastic sliding member. The actuating mechanism comprises a horizontal handle arranged on an exterior surface of the lock shell assembly, a rotate button arranged in the lock shell assembly for pushing the elastic sliding member, and a switchable connect member connecting the rotate button and the horizontal handle, so that the direction of the horizontal handle can be easily changed and the problems of conventional technologies are thus solved.

Abstract: A door lock transmission mechanism is provided on the first surface of a door for transmitting movement to a door lock provided on the second surface of the door opposite to the first surface. The door lock transmission mechanism includes a lock casing unit, an actuation mechanism, and a locking mechanism. The actuation mechanism includes a traction member having a traction portion for driving a locking seat of a core unit of the locking mechanism, wherein the locking seat can rotate freely when the locking mechanism is locked, such that an actuation member of the actuation mechanism can be pressed down by force and keeps the locking state of the door lock, and thus the parts of the door lock transmission mechanism can be protected from being damaged.

Abstract: A door lock transmission mechanism is provided on the first surface of a door for transmitting movement to a door lock provided on the second surface of the door opposite to the first surface. The door lock transmission mechanism includes a lock casing unit, an actuation mechanism, and a locking mechanism. The actuation mechanism includes a traction member having a traction portion for driving a locking seat of a core unit of the locking mechanism, wherein the locking seat can rotate freely when the locking mechanism is locked, such that an actuation member of the actuation mechanism can be pressed down by force and keeps the locking state of the door lock, and thus the parts of the door lock transmission mechanism can be protected from being damaged.