A system for monitoring the state of a hook-keeper unit of an aeronautical structure. The hook-keeper unit is movable between a latched state and in a non-latched state, a mechanical warning element is movable between an exposed state and an unexposed state, and a connecting mechanism comprises a first end coupled to the hook-keeper unit, and a second end coupled to the mechanical warning element. The connecting mechanism is configured to automatically transmit the state of the hook-keeper unit to the mechanical warning element. The hook-keeper unit and the mechanical warning element are coupled between them by the connecting mechanism in an automatic bijective relationship, so that when the hook-keeper unit is in the latched state, the mechanical warning element is automatically in the unexposed state, and when the hook-keeper unit is in the non-latched state, the mechanical warning element is automatically in the exposed state.

An appliance includes a hinge module between a main body and a pull-down door. The hinge module includes a housing, a rotational axis member disposed in the housing serving as a center of rotation between the pull-down door and the main body, an inner link housing movably disposed in the housing that moves with the opening of the pull-down door in a direction of the rotational axis member, and a damper installed in the inner link housing, the damper including a piston and a cylinder and providing damping force according to a relative movement of the piston and the cylinder. Any one of the piston and the cylinder of the damper moves with the inner link housing and the other of the piston and the cylinder of the damper moves by a predetermined distance as the inner link housing moves and then is interfered by the housing so as not to move further, and the piston and the cylinder of the damper starts damping, wherein the predetermined distance corresponds to an opening angle of the pull-down door in which the damping is started.

An appliance includes a hinge module between a main body and a pull-down door. The hinge module includes a housing, a rotational axis member disposed in the housing serving as a center of rotation between the pull-down door and the main body, an inner link housing movably disposed in the housing that moves with the opening of the pull-down door in a direction of the rotational axis member, and a damper installed in the inner link housing, the damper including a piston and a cylinder and providing damping force according to a relative movement of the piston and the cylinder. Any one of the piston and the cylinder of the damper moves with the inner link housing and the other of the piston and the cylinder of the damper moves by a predetermined distance as the inner link housing moves and then is interfered by the housing so as not to move further, and the piston and the cylinder of the damper starts damping, wherein the predetermined distance corresponds to an opening angle of the pull-down door in which the damping is started.

A latch assembly for an appliance includes a cabinet having a front panel with a latch opening. A latch member is aligned with the latch opening of the front panel and is movable between an engaged position and a disengaged position. A door is hingedly coupled to the cabinet between open and closed positions and has a latch receiving aperture. A cover plate is configured to selectively cover the latch opening. The cover plate is rotatably coupled with the cabinet between first and second positions.

A latch structure comprising an elastic pull latch is disclosed. The top of the elastic pull latch includes a latch bar configured with a latch groove. The elastic pull latch also includes an elastic boss that moves in and out of the latch cover of the pull latch. On both sides of a box, an elastic pull latch is provided at the top and a catch groove having a catch affixed to the lower edge is provided at the bottom. When two boxes are stacked together, the catch in the catch groove of the upper box is snapped into the latch groove of the elastic pull latch of the lower box to securely connect the two boxes. When the latch is released, the catch of the upper box blocks the elastic boss of the latch of the lower box to prevent the latch from retracting inwards.

A latch structure comprising an elastic pull latch is disclosed. The top of the elastic pull latch includes a latch bar configured with a latch groove. The elastic pull latch also includes an elastic boss that moves in and out of the latch cover of the pull latch. On both sides of a box, an elastic pull latch is provided at the top and a catch groove having a catch affixed to the lower edge is provided at the bottom. When two boxes are stacked together, the catch in the catch groove of the upper box is snapped into the latch groove of the elastic pull latch of the lower box to securely connect the two boxes. When the latch is released, the catch of the upper box blocks the elastic boss of the latch of the lower box to prevent the latch from retracting inwards.

An appliance includes a hinge module between a main body and a pull-down door. The hinge module includes a housing, a rotational axis member disposed in the housing serving as a center of rotation between the pull-down door and the main body, an inner link housing movably disposed in the housing that moves with the opening of the pull-down door in a direction of the rotational axis member, and a damper installed in the inner link housing, the damper including a piston and a cylinder and providing damping force according to a relative movement of the piston and the cylinder. Any one of the piston and the cylinder of the damper moves with the inner link housing and the other of the piston and the cylinder of the damper moves by a predetermined distance as the inner link housing moves and then is interfered by the housing so as not to move further, and the piston and the cylinder of the damper starts damping, wherein the predetermined distance corresponds to an opening angle of the pull-down door in which the damping is started.

An appliance includes a hinge module between a main body and a pull-down door. The hinge module includes a housing, a rotational axis member disposed in the housing serving as a center of rotation between the pull-down door and the main body, an inner link housing movably disposed in the housing that moves with the opening of the pull-down door in a direction of the rotational axis member, and a damper installed in the inner link housing, the damper including a piston and a cylinder and providing damping force according to a relative movement of the piston and the cylinder. Any one of the piston and the cylinder of the damper moves with the inner link housing and the other of the piston and the cylinder of the damper moves by a predetermined distance as the inner link housing moves and then is interfered by the housing so as not to move further, and the piston and the cylinder of the damper starts damping, wherein the predetermined distance corresponds to an opening angle of the pull-down door in which the damping is started.

A vehicle hood pin apparatus is disclosed which contains an outer housing with holes to accept a cotter pin or other self-locking device, an inner pin with holes that can mate with the holes on the outer housing, and an electric switch attached to the housing to communicate signals to the vehicle, and in mechanical connection with the inner pin. By mating the holes in the inner pin with the holes in the outer housing and inserting the cotter pin or other self-locking device into the mated holes, the hood is closed securely on the vehicle and the electric switch sends a signal to the vehicle.

A vehicle hood pin apparatus is disclosed which contains an outer housing with holes to accept a cotter pin or other self-locking device, an inner pin with holes that can mate with the holes on the outer housing, and an electric switch attached to the housing to communicate signals to the vehicle, and in mechanical connection with the inner pin. By mating the holes in the inner pin with the holes in the outer housing and inserting the cotter pin or other self-locking device into the mated holes, the hood is closed securely on the vehicle and the electric switch sends a signal to the vehicle.