| 摘要 |
The captive screw (10) has a threaded shank (20), at least one means (22) to make it easier to rotate it, a partially hollow knob (30) mounted rigidly on one end of the threaded shank (20) and having an end cap (36), a hollow barrel (60) including a first and second end (62, 70) and a clip-fastening means (65, 69) for a panel provided on the second end (70) for attaching the barrel (60) to the top surface of an upper panel (80), a means for rendering the said threaded shank (20) captive, the first end (62) of the barrel (60) being attached to the knob (30) so that it can slide and rotate, an urging means (50) extending between the barrel (60) and the knob (30) and forcing the threaded shank (20) to be in a completely retracted position when no axial load is applied to this knob. <IMAGE>
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