Automatic door closing device

The utility model relates to an automatic door closing device whose base is fixedly arranged on the wall surface of the upper margin of a door frame. Coaxial support slots and reed slots are respectively formed on the top face and the bottom face of the base for a shaft stop piece penetrating throug...

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Bibliographic Details
Main Author LIN WUXIONG
Format Patent
LanguageEnglish
Published 27.11.1996
Edition6
Subjects
CHECKS FOR WINGS
DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION
FIXED CONSTRUCTIONS
KEYS
LOCKS
SAFES
WINDOW OR DOOR FITTINGS
WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THEFUNCTIONING OF THE WING
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Summary:The utility model relates to an automatic door closing device whose base is fixedly arranged on the wall surface of the upper margin of a door frame. Coaxial support slots and reed slots are respectively formed on the top face and the bottom face of the base for a shaft stop piece penetrating through shaft holes and clamping with swirl elastic sheets in the reed slots, and rotation stop blocks used for positioning an interlocking shift bar is fixedly locked at the bottom end of the shaft stop piece. The barrel body of a cushion device is assembled in a lean setting slot, the toothed bar of the cushion device is penetrated through the channel of the base, and the tooth surface of the toothed bar and the ring tooth surface of the shaft stop piece are mutually meshed. A shaft bar penetrated in the barrel body is interlocked by the toothed bar to be matched with a piston at the end of the shaft bar to be shifted backwards and forwards in the hydraulic oil of the barrel body, and proper buffering efficiency is generated by the automatic door closing device when door plates are returned to be closed.
Bibliography:Application Number: CN1995225812U