Motor, lens barrel, camera system, and method for producing motor

Abstract

An oscillatory wave motor, a lens barrel, and a camera system are provided, which have long service lives and which are stable. An oscillatory wave motor includes an oscillator which generates oscillation on an elastic member in accordance with excitation of an electromechanical conversion element, and a relative movement member which is pressurized to make contact with the oscillator and which moves relative to the oscillator in accordance with the oscillation. The oscillatory wave motor has an epoxy resin film formed of silicon beads and an epoxy resin and which is formed on at least one of frictional contact surfaces of the oscillator and the relative movement member.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a perspective view illustrating an oscillatory wave motor according to a first embodiment.

FIG. 2 shows a sectional view illustrating, in detail, frictional contact surfaces of an elastic member 12 and a movable member 13 of the oscillatory wave motor 10 according to the first embodiment.

FIG. 3 illustrates an oscillatory wave motor according to a third embodiment.

FIG. 4 shows a sectional view illustrating a camera provided with the oscillatory wave motor according to the first embodiment.

FIG. 5A to 5F shows steps of producing an epoxy resin film according to the first embodiment.

FIG. 6 shows a sectional view illustrating the epoxy resin film of the first embodiment before being polished.

FIG. 7 shows a sectional view illustrating the epoxy resin film of the first embodiment after being polished.

Claims

1. A motor comprising: a first member;a second member which makes contact with the first member, the first member and the second member being relatively movable; anda thermosetting resin film which is formed of a particulate additive and a thermosetting resin, and which is formed on at least one of contact surfaces of the first member and the second member.

2. The motor according to claim 1, wherein the additive is exposed on a surface of the thermosetting resin film.

3. The motor according to claim 2, wherein the additive contains at least one of silicon beads, acrylic beads, and carbon beads.

4. The motor according to claim 1, wherein the additive contains at least one of silicon beads, acrylic beads, and carbon beads.

5. The motor according to claim 4, wherein the silicon beads are contained in an amount of 5 to 20% by weight.

6. The motor according to claim 4, wherein the silicon beads have a particle size of not more than 6 μm.

7. The motor according to claim 4, wherein the acrylic beads are contained in an amount of 5 to 30% by weight.

8. The motor according to claim 4, wherein the acrylic beads have a particle size of not more than 5 μm.

9. The motor according to claim 4, wherein the thermosetting resin film is formed by using polytetrafluoroethylene.

10. The motor according to claim 9, wherein the thermosetting resin film is formed by using a frictional coefficient-increasing agent which increases a frictional coefficient of the contact surfaces.

11. The motor according to claim 10, wherein the thermosetting resin contains at least one of an epoxy resin and a phenol resin.

12. The motor according to claim 4, wherein the thermosetting resin contains at least one of an epoxy resin and a phenol resin.

13. The motor according to claim 12, wherein the epoxy resin is an isocyanate curable type epoxy resin.

14. The motor according to claim 13, wherein the epoxy resin is an epoxy resin to which a compound having one of phenolic hydroxyl group and methylol group is blended as a curable prepolymer.

15. The motor according to claim 1, wherein the thermosetting resin film is formed by using a fluororesin.

16. The motor according to claim 15, wherein the fluororesin is polytetrafluoroethylene.

17. The motor according to claim 1, wherein the thermosetting resin film is formed by using a frictional coefficient-increasing agent which increases a frictional coefficient of the contact surfaces.

18. The motor according to claim 17, wherein the frictional coefficient-increasing agent is carbon.

19. The motor according to claim 18, wherein the carbon is contained in an amount of 2 to 10% by weight.

20. The motor according to claim 1, wherein the thermosetting resin contains at least one of an epoxy resin and a phenol resin.

21. The motor according to claim 20, wherein the epoxy resin is an isocyanate curable type epoxy resin.

22. The motor according to claim 21, wherein the thermosetting resin film has a thickness of not more than 60 μm.

23. The motor according to claim 21, wherein the thermosetting resin film contains polytetrafluoroethylene in an amount of 5 to 35% by weight.

24. The motor according to claim 20, wherein the epoxy resin is an epoxy resin to which a compound having one of phenolic hydroxyl group and methylol group is blended as a curable prepolymer.

25. The motor according to claim 24, wherein the thermosetting resin film has a thickness of not more than 100 μm.

26. The motor according to claim 24, wherein the thermosetting resin film contains polytetrafluoroethylene in an amount of 10 to 35% by weight.

27. The motor according to claim 1, wherein the thermosetting resin film has a surface roughness in which a maximum height roughness is not more than 1 μm.

28. The motor according to claim 1, wherein the thermosetting resin film has a vertical cross-sectional shape which is substantially trapezoidal.

29. The motor according to claim 1, wherein: the first member is an oscillator which generates oscillation on an elastic member in accordance with excitation of an electromechanical conversion element; andthe second member is a relative movable member which moves relative to the oscillator by the oscillation.

30. A lens barrel comprising: the motor as defined in claim 1; andan optical system which is driven by using the motor as a driving source.

31. A camera system comprising a mount portion to which the optical system as defined in claim 30 is mountable.

32. A method for producing a motor, comprising: a step for providing a particulate additive and a thermosetting resin to at least one of contact surfaces of a first member and a second member; anda step for relatively moving the first member and the second member in a state in which the first member and the second member make contact with each other.

33. The method for producing the motor according to claim 32, further comprising a step for curing the thermosetting resin and then performing polishing.

34. A motor comprising: an oscillator which generates oscillation on an elastic member in accordance with excitation of an electromechanical conversion element;a relative movable member which moves relative to the oscillator by the oscillation while making contact with the oscillator; anda thermosetting resin film which is formed by using a particulate additive and a thermosetting resin containing at least one of an epoxy resin and a phenol resin and which is provided on at least one of contact surfaces of the oscillator and the relative movable member.

35. The motor according to claim 34, wherein: the additive is acrylic beads; andthe thermosetting resin is an isocyanate curable type epoxy resin.

36. The motor according to claim 34, wherein: the additive is silicon beads; andthe thermosetting resin is an epoxy resin including a phenol resin blended therein as a curable prepolymer.