| 摘要 |
<p>A stepless slide adjuster having a safety lock includes a first member and a second member, which can move relatively to each other, a nut fastened to the first member, a screw rotatably attached to the second member and screwed into the nut, a manual locking device for manually locking the screw, and an emergency locking device having a brake drum and brake shoes for emergency locking the screw. The lead angle of the nut and the screw is set to be larger than the friction angle between them. When the locking with the manual locking device is released, and the screw rotates with an acceleration or a speed that exceeds a predetermined value, then the brake shoes spread and frictionally engage the brake drum, thereby impeding a relative movement between the first member and the second member. <IMAGE></p> |
