| 摘要 |
<p>The freely movable button plate (4) is seated on a locally fixed base (1) associated with a single pin fastening peg (13) which - by means of its collar (15) - braces the outer edge of the base against the supporting material (12) so that whilst the button plate can waggle freely relative to the material, the base cannot, irrespective of the thickness of the supporting material. The edge of the base which lies concentric with the waggle peg (13) at a max. distance from it forms a support face which - even when pressed slightly into the supporting material - ensures the fixed position of the base against the material.</p> |
