| 摘要 |
PROBLEM TO BE SOLVED: To make the external dimension of a fixed group compact for the movable range of a movable group.SOLUTION: A drive unit 4 includes a movable member 44 to which a coil 441 is fixed, and a stationary member 41 to which magnets 401-402 are fixed at positions corresponding to the coil 441, and moves the movable member 44 for the stationary member 41, by electrifying the coil 441. A magnet abutment part 413 for abutting the magnet, when fixing the magnet to the stationary member 41, is formed in the stationary member 41. On the opposite side to the magnet abutment part 413 while sandwiching the magnet, a movable member abutment part 419, against which the movable member 44 abuts when it is moved to the end of the movable range, is formed. In the vicinity of the movable member abutment part 419, a notch 418 for exposing the second face of a magnet, becoming the back surface of the first surface of a magnet abutting against the magnet abutment part 413, is formed.SELECTED DRAWING: Figure 8 |
