An access opening closure device is provided for enabling passage of food or medication into a confined space without providing direct access from within the confined space to outside of the confined space. The device includes a housing assembly including a body and a cover, and a slide assembly including an access door and a frame. The body defines a receptacle and first and second openings. The housing assembly is pivotally coupled to the slide assembly and is movable from an operative position to a stowed, non-operative position.

An access opening closure device is provided for enabling passage of food or medication into a confined space without providing direct access from within the confined space to outside of the confined space. The device includes a housing assembly including a body and a cover, and a slide assembly including an access door and a frame. The body defines a receptacle and first and second openings. The housing assembly is pivotally coupled to the slide assembly and is movable from an operative position to a stowed, non-operative position.

A lock assembly for a door includes a lock body having a housing with at least one deadbolt supported in the housing for movement between a retracted position and an extended position and biased toward the extended position by a spring, and a trigger mechanism mounted on the door separate from the lock body for engagement with a door jamb upon closure of the door, said trigger mechanism being adapted to hold the at least one deadbolt in the retracted position when the door is open in opposition to a spring bias, and to permit movement of the at least one deadbolt to the extended position upon engagement of the trigger mechanism with the door jamb.

A lock assembly for a door includes a lock body having a housing with at least one deadbolt supported in the housing for movement between a retracted position and an extended position and biased toward the extended position by a spring, and a trigger mechanism mounted on the door separate from the lock body for engagement with a door jamb upon closure of the door, said trigger mechanism being adapted to hold the at least one deadbolt in the retracted position when the door is open in opposition to a spring bias, and to permit movement of the at least one deadbolt to the extended position upon engagement of the trigger mechanism with the door jamb.

The present disclosure provides a lock with a clutch driving mechanism, comprising a driving input portion, a dutch component, a dead bolt driving component, a latch bolt driving component, a first end of the driving input portion is driven, and the second end is connected to the clutch component; a first end of the dutch component is driven, a second end drive one of the dead bolt driving component and the latch bolt driving component, a first end of the latch bolt driving component is driven in the second direction, a second end opens the door. The mechanism can simply realize the keyless mechanical double locking of the dead bolt while the latch bolt still remains in the normally open mode without using the key every time when locking the dead bolt, that key or motor drive is used only when the dead bolt double locking is to be released.

The present disclosure provides a lock with a clutch driving mechanism, comprising a driving input portion, a dutch component, a dead bolt driving component, a latch bolt driving component, a first end of the driving input portion is driven, and the second end is connected to the clutch component; a first end of the dutch component is driven, a second end drive one of the dead bolt driving component and the latch bolt driving component, a first end of the latch bolt driving component is driven in the second direction, a second end opens the door. The mechanism can simply realize the keyless mechanical double locking of the dead bolt while the latch bolt still remains in the normally open mode without using the key every time when locking the dead bolt, that key or motor drive is used only when the dead bolt double locking is to be released.

A latch assembly comprises an exterior housing, a door latch, a plunger, a resilient member, and an external lever pivotally mounted on an outer face of the exterior housing. The external lever comprises a first leg, a second leg disposed at an angle relative to the first leg, and a pivot mount disposed between the first leg and the second leg. The plunger is maintained in the latched position when the external lever is in a latched position by the resilient member, whereby an entry door cannot be unintentionally shifted from the closed position. The plunger is displaced from the latched position to the unlatched position when the external lever is rotated from the latched position to the unlatched position by the second leg bearing against the plunger, whereby the entry door is free to be shifted from the closed position to the open position.

A latch assembly comprises an exterior housing, a door latch, a plunger, a resilient member, and an external lever pivotally mounted on an outer face of the exterior housing. The external lever comprises a first leg, a second leg disposed at an angle relative to the first leg, and a pivot mount disposed between the first leg and the second leg. The plunger is maintained in the latched position when the external lever is in a latched position by the resilient member, whereby an entry door cannot be unintentionally shifted from the closed position. The plunger is displaced from the latched position to the unlatched position when the external lever is rotated from the latched position to the unlatched position by the second leg bearing against the plunger, whereby the entry door is free to be shifted from the closed position to the open position.

A door lock includes a main lock ensemble and two auxiliary lock ensembles. Each of the two auxiliary lock ensembles connects the main lock ensemble with a long bar. The main lock ensemble includes a housing with a pivotal part being connected to a horizontal bar and a lock tongue, each of two ends of the horizontal bar connecting with one said long bar to switch the auxiliary lock ensembles locked and unlocked. A lock chip is disposed in the housing. The lock chip includes an accommodating hole with a recess for accommodating a rotatable lock core. A pushing block that is disposed on the lock core extends into the recess.

A door lock includes a main lock ensemble and two auxiliary lock ensembles. Each of the two auxiliary lock ensembles connects the main lock ensemble with a long bar. The main lock ensemble includes a housing with a pivotal part being connected to a horizontal bar and a lock tongue, each of two ends of the horizontal bar connecting with one said long bar to switch the auxiliary lock ensembles locked and unlocked. A lock chip is disposed in the housing. The lock chip includes an accommodating hole with a recess for accommodating a rotatable lock core. A pushing block that is disposed on the lock core extends into the recess.