| 摘要 |
<p>The invention is a vacuum suction apparatus comprising a cup shape case (10) having a center opening (12), a suction pad (20) disposed under the case (10) and having a screw shaft (22) engaged into the center opening (12) of the case (10), a adjusting cap (30) disposed on the case (10) and threadly engaged on the upper end of the screw shaft (22) and a soft ring (40) provided on the lower periphery of the case (10) and a part of it being overlapped on the edge of the suction pad (20), and the soft ring (40) is made of the material softer than that of the suction pad (20).</p> |
