| 摘要 |
PROBLEM TO BE SOLVED: To provide a driving device in which heat generation of a coil is reduced, and assembly workability is improved.SOLUTION: A driving device 30 includes: a movable unit 23; a base; and guide members 24 and 25 for supporting the movable unit movable in an axial direction. A first yoke member 16 is attached to one of the movable unit and the base, and a second yoke member 17 is attached to the other one. The first yoke member includes: a base portion 61 that holds a first permanent magnet 21 opposed to the second yoke member; and a pair of projection portions 62 and 63 that project from the base portion and are opposed to the second yoke member through a given gap. The second yoke member is longer than the first yoke member, and a coil 19 is attached to the second yoke member. The first permanent magnet and a part of the coil are arranged in a region surrounded by the first yoke member and the second yoke member. When electricity flows through the coil, driving force in the axial direction is generated in the first yoke member and between the first permanent magnet and the second yoke member, so that the movable unit is moved along the guide members. |
