| 摘要 |
<p>This invention relates to an automatic door-shutting device, which comprises a set of primary hinge (1,2) and a set of secondary hinge (5,6). By means of an axle (23) rotating on a stair-case-shaped axle seat, (13) said primary hinge (1,2) can have the door opened to both sides, slowly closed, or opened at a wide angle for long time. Said secondary hinge (5,6) includes an inner (54) and an outer (55) eccentric axle bushes, through which said secondary hinge (5,6) can automatically adjust its axis to be in alignment with that of said primary hinge, (1,2) i.e. in a co-axis in case of said automatic door-shutting device generating any eccentric condition. The door can not be operated smoothly in case of the said two hinges being out of their co-axis. Moreover, it is easy to be assembled or disassembled between said left and right side primary hinge pieces, and also between said left and right side secondary hinge pieces.</p> |
