| 摘要 |
PURPOSE:To ensure an accurate attachment in both position and direction with an extremely simple working, by providing an engagement part having a form corresponding to the external shape of a movable coil and an end face at the outer circumference of a holder and then fixing a movable coil to the engagement part. CONSTITUTION:A holder 3 made of synthetic resin is bonded at the rear edge of a cantilever 2, and a pair of mvable coils 4 and 4' are fixed on the circumference of the holder 3. The holder 3 contains two arc-shaped cuts 8 and 8' provided at the circumference on one surface of a disk with 90 deg. angles. These cuts 8 and 8' plus rear end faces 9 and 9' form an engagement part between coils 4 and 4', and the cut circular arc coincides with the external form of coils 4 and 4'. Thus the rear end faces are used for positioning of coils 4 and 4' in the axis direction. In such way, an accurate attachment is possible in both position and direction with an extremely simple working. |
