| 摘要 |
PURPOSE:To permit a packing to be rapidly and positively inserted by enabling a return piece and drawing pin to move together with an operating body and the drawing pin to retreat from a shoulder surface with which the packing engages only when the operating body returns. CONSTITUTION:A packing 3 is drawn up by a drawing pin 19 to be screwed fixedly to a engaging shoulder portion 11. Under such condition, the packing 3 is inserted from above a watch 1 side into the interior of the cylindrical portion. When a portion of the packing except for that drawn up is to the corresponding annular groove 2 at the watch 1 side to release a pressure piece 21, an operating body 6 is moved leftward by a return spring 35. Then a L-shaped pawl 18 engages a horizontal pin 31 on the upper left end of a vertical portion 25 to block the leftward movement of the pin 31 so that the L-shaped pawl 18 pivots clockwise about a saft 28. Thus the lower end of the drawing pin 19 is rotated upward clockwise from the proximity of a fitting lug 30 and retreated. |
