Abstract: A latch structure according to an embodiment includes a body, a locking body, a latch head, a plunger, and a latch stopper. The body is disposed inside a door. The locking body moves in response to an external operation. The latch head protrudes from the body to maintain the door in a closed position, and rotates when the locking body is spaced apart at least a predetermined distance. The plunger retracts into the body to prevent the latch head from rotating while the door is being closed. The latch stopper prevents the protruding latch head from retracting into the body when the plunger is maintained within the body.

Abstract: A latch structure according to an embodiment includes a body, a locking body, a latch head, a plunger, and a latch stopper. The body is disposed inside a door. The locking body moves in response to an external operation. The latch head protrudes from the body to maintain the door in a closed position, and rotates when the locking body is spaced apart at least a predetermined distance. The plunger retracts into the body to prevent the latch head from rotating while the door is being closed. The latch stopper prevents the protruding latch head from retracting into the body when the plunger is maintained within the body.

Abstract: A present invention relates to a digital doorlock including a latch bolt self-loosening structure which includes an authenticator which receives an authentication signal and performs authentication; a motor which is driven in a predetermined direction when authentication is performed by the authenticator; a latch operator which can be operated through driving of the motor; and a shaft which is rotated according to operation of the latch operator and operates a latch bolt, wherein the latch operator releases the latch bolt by operating according to the authentication and rotating the shaft in one direction.

Abstract: A door locking device including a rotary part including a first rotary part and a second rotary part allowed to be changed into a locked state or an unlocked state through rotation; an elastic rotary part rotated by movement of a locking body moved by a key; a cam lever moved by rotation of the elastic rotary part; a clutch pushed and moved by movement of the cam lever; and an interlocking member inserted into the rotary part by movement of the clutch to interlock the first rotary part and the second rotary part is provided.

Abstract: Provided is a mortise device. According to one embodiment, the mortise device includes a mortise installed at a door, a face plate coupled to one side surface of the mortise, a latch bolt which thrusts out of or retracts into the one side surface of the mortise to which the face plate is coupled, a guide protrusion formed on the latch bolt, and a fixing pin which allows the latch bolt to be installed in the mortise.

Abstract: Provided is an apparatus for detecting opening and closing of a door. The apparatus includes a sensor unit, which is installed at a location close to a first member and detects an opening and closing of a door, a loading unit coupled to the sensor unit and a folded unit, folded and rotated based on a center of the folded unit when a back set distance from a side surface of the door to a center line of an indoor unit is small, and led in an installation groove of an indoor unit, and a case coupled to the loading unit when the back set distance from the side surface of the door to the center line of the indoor unit is larger, and separated from the loading unit when the back set distance from the side surface of the door to the center line of the indoor unit is small.

Abstract: Provided is an apparatus for detecting opening and closing of a door. The apparatus includes a sensor unit, which is installed at a location close to a first member and detects an opening and closing of a door, a loading unit coupled to the sensor unit and a folded unit, folded and rotated based on a center of the folded unit when a back set distance from a side surface of the door to a center line of an indoor unit is small, and led in an installation groove of an indoor unit, and a case coupled to the loading unit when the back set distance from the side surface of the door to the center line of the indoor unit is larger, and separated from the loading unit when the back set distance from the side surface of the door to the center line of the indoor unit is small.

Abstract: Provided is a door mortise lock that may improve product safety and user convenience by enabling a latch bolt operates to be unlocked after a dead bolt of the door mortise lock completely operates. To this end, the door mortise lock includes: a dead bolt driving unit that operates a dead bolt; a latch bolt driving unit that unlocks a latch bolt when a time interval passes after the dead bolt is unlocked by the dead bolt driving unit; and a connection unit that is disposed between the dead bolt driving unit and the latch bolt driving unit, and selectively operates the dead bolt driving unit and the latch bolt driving unit so that the dead bolt and the latch bolt are sequentially unlocked with a time interval.

Abstract: Provided is a door-lock apparatus. In the door-lock apparatus which minimizes a loss of a driving force due to a lateral pressure of a thumb-turn gear and a thumb-turn rotating body or an assembling structure of the thumb-turn rotating body and also minimizes a load of a manual operation through the thumb-turn rotating body or the assembling structure of the thumb-turn rotating body, a groove serving as an idle section of a driving force is formed at the thumb-turn rotating body or the assembling structure of the thumb-turn rotating body, and when a lever (or knob) is manually rotated to lock or unlock a lockset of the door-lock apparatus, the manual rotation of the lever (or knob) for locking or unlocking of the lockset separately from a driving motor is smoothly realized with a small force, and also a load of the driving motor is minimized.

Abstract: Provided is a door lock mortise that may improve product safety and user convenience by enabling a latch bolt operates to be unlocked after a dead bolt of the door lock mortise completely operates. To this end, the door lock mortise includes: a dead bolt driving unit that operates a dead bolt; a latch bolt driving unit that unlocks a latch bolt when a time interval passes after the dead bolt is unlocked by the dead bolt driving unit; and a connection unit that is disposed between the dead bolt driving unit and the latch bolt driving unit, and selectively operates the dead bolt driving unit and the latch bolt driving unit so that the dead bolt and the latch bolt are sequentially unlocked with a time interval.