| 摘要 |
PURPOSE: A device for keeping a fireproof door open and closing it in times of emergency is provided to use a small solenoid actuator and a small storage battery and enable repetitive use without re-assembling. CONSTITUTION: A device for keeping a fireproof door open and closing it in times of emergency comprises a housing(100), a rotating-cam assembly(200), a cam-latch assembly(300), a lock-lever assembly(400), a solenoid actuator(500), and a control circuit unit(600). The housing is fixed to a door frame. The rotating-cam assembly, cam-latch assembly, lock-lever assembly, solenoid actuator, and control circuit unit are arranged in the housing. When the fireproof is usually open by over a given angle, the open state of the fireproof is maintained at the given angle since the rotation of a rotary cam by a cam latch is inhibited. |
