| 摘要 |
<p>The disclosure herein describes a device for fastening objects to thin or hollow walls which comprises: a bolt, a nut with an aperture, a guide blade mounted to the bolt and extending lengthwise thereon and a bicycle mounted to the bolt and interconnected to the nut by a tongue, pivotal movement of the bicycle on and relative to the bolt is caused by the nut acting on the bicycle through the tongue when the nut is threadedly displaced along the shank portion of the bolt as a result of the bolt being rotated; the guide blade extends through the aperture of the nut and prevents it from rotating with the bolt.</p> |
