A safety cabinet is disclosed which includes an enclosure having a double-wall construction and at least one door to selectively seal the enclosure. The safety cabinet includes a latch system for selectively retaining the door(s) in a closed position to cover the enclosure. The safety cabinet can be used to store, for example, flammable liquids, flammable waste, corrosives, pesticides, or combustible waste. The latch system includes fusible links that fuse when exposed to high ambient temperatures and cause the latch system to further engage the enclosure, thereby promoting the interlocking relationship between the door(s) and the enclosure when the safety cabinet is exposed to threshold high ambient temperatures.

An exit device located in a door frame having a door strike including a latchbolt assembly, a pushbar assembly, and a link assembly. The latchbolt assembly includes an extended position configured to engage the door strike, and a retracted position configured to move past the door strike. The pushbar assembly moves from a released position to a pressed position to move the latchbolt assembly from the extended position to the retracted position. The link assembly is operatively connected to the pushbar assembly and includes a security link having an elongated aperture and a pin configured to extend through the elongated aperture about which the security link rotates. A keeper surrounds the pin and supports the security link for rotation. In the event of extreme heat, the keeper melts and the security link moves to a position to substantially prevent opening of the door.

A door lock structure is disclosed. The door lock structure is used to mount a fire door and includes a base, a pressing component, a pressing shell and a locking component. The base is disposed on the fire door and has an accommodation groove, and a groove bottom of the accommodation groove has a first locking hole. The pressing component includes a pressing base, a roller column, a fixing plate, an elastic part and a locking part.