| 摘要 |
A positioning device has a sphere portion (30) sized to be movably retained in tapered passage (21). Shank (31) extends radially and outwardly from sphere portion and connect to at least one collar (32) which has one protrusion extending from an inner periphery. A positioning portion has a head (41) movably retained in the collar (32) and a tail (42) extending traversely from a mediate point of the head (41). The tail is positioned corresponding to the collar (32) so as to position a resilient portion between the head (41) and the collar (32). The tapered passage (21) has lower inner diameter smaller than upper inner diameter. The sphere portion (30) has a diameter smaller than passages upper inner diameter and larger than lower inner diameter. |
