| 摘要 |
<p>A power-driven automobile door locking device is of the basic type wherein a conventional rotary bolt is engaged by a ratchet lever 11 which may be released by operating lever 42. The device has a lock lever 31 having a locking position in which the latch is not releasable and an unlocking position (Figures 5 and 6 not shown), between which it is moved by a motor M. The motor rotates a disk 63, which has an essentially spiral cam groove 70 in its surface. A cam follower 76 engages with this groove 70, and, as the disk is rotated, is caused to move radially of the disk. The radial movement of the cam follower 76 is transmitted to the lock lever 31 through any suitable mechanism, such as lever 75 and lever 80, keyed to lever 31. The rotary disk may be replaced by a rotary cylinder having a cam groove in its cylindrical surface (Figure 19, not shown). The motor output is thus amplified, driving the locking lever 31 completely into its locking and releasing positions, overcoming the resistance of any over-centre spring. In the modified groove shown in Figure 26 only edge parts 147b, 148b have any camming action; parts 147a and 148a are of constant radius. The groove is widest at its mid-point, which is the rest position. <IMAGE></p> |
