| 摘要 |
To form switch-mounting portions, switch drive portions and so on, provided at a top hoop and a spacer, with high positional precision so that switch operating signals can be outputted with positive and good operability. Bosses 7 a and 7 b are formed on spacers 5 a and 5 b provided between a top rubber 4 and a top hoop 3 . Guide holes 8 a and 8 b for respectively guiding the movements of the bosses 7 a and 7 b in accordance with a pounding operation on the top rubber 4 are formed in a flat plate portion 3 a of the top hoop 3 . Bushings 10 , made of a high wear-resistant resin, are mounted respectively in the guide holes 8 a and 8 b. By doing so, switch-mounting portions 9 a and 9 b, switch drive portions 6 a and 6 b and so on, provided at the top hoop 3 and the spacers 5 a and 5 b, are formed with high positional precision. |
