| 摘要 |
A positioning board (1) for a chuck includes a board member (10) with a central bore (20), positioning bores (30) and positioning slots (40). Each positioning slot (40) has a main slot (41) and two sub-slots (42, 43) connected to opposite ends (41a, 41b) of the main slot (41) to form an H-shaped slot. Two flexible tongues (13) are formed at opposite sides of the main slot (41). Therefore, while a post (2a, 3a) of a base (2, 3) engages the positioning slot (40), the flexible tongues (13) are bent by the post (2a, 3a) to provide a precise engagement of chuck's bases (2, 3). |
