| 摘要 |
<p>PURPOSE: To prevent the theft of the ball adapting to a circumstance under which the mouse is used. CONSTITUTION: In the space 24 at the inside of the lower case 3 of a mouse 1, a hook 26 is provided. Further, a hook restraint part is formed by providing slant installation parts 15, 15 and recessed grooves 16, 16 on all the bayonet pawls 13 and 14 of a ball holding ring 7. The hook restraint part is formed on only the bayonet pawls 13 to be the part of the ball holding ring. A small hole 17 is punched on a ring plate 11 at the location opposite to the recessed groove 16. An angular hole 28 is punched on a ring-shaped recessed part 21 at the location opposite to the tip part of the hook 26.</p> |
