| 摘要 |
PURPOSE: Hinge structure for a door is provided to prevent an accident by making a returning speed and a rotating speed of the door different and to prevent a shaking of the door by forming strong closing force of the door. CONSTITUTION: An upper hinge(50) and a lower hinge are separated from each other. The upper hinge(50) is separated to a pipe-shaped upper body(10) having an opening(11) and a saw tooth(12) and a lower body(40) having a recessed groove(41). The upper body and the lower body are combined by a center shaft(1) and a bearing(2). A rotating ring(14) having tracks(13) and a sliding groove is inserted in the upper body(10). Track pins(3) are inserted in the tracks(13). A spring(15) is installed in the rotating ring(14). A pressure control bolt(17) having inserting slots(16) is inserted in the rotating ring. The lower hinge is separated to a pipe-shaped upper body(10) having an opening(11) and a saw tooth(12) and a lower body(40) having a recessed groove(41). The upper body and the lower body are combined by a center shaft(1) and a bearing(2). Rotating pieces(100) are combined with the openings(11). A fixing piece(200) is inserted in the recessed groove(41) of the lower body(40).
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