Vibration type driving aparatus

• US 20010000940A1
• Filed: 12/06/2000
• Published: 05/10/2001
• Est. Priority Date: 09/30/1997
• Status: Abandoned Application

• Current Assignee: Ichiro Chiba, Takashi Kai, Yutaka Maruyama
• Original Assignee: Ichiro Chiba, Takashi Kai, Yutaka Maruyama
• Inventors: Chiba, Ichiro, Maruyama, Yutaka, Kai, Takashi
• Application Number:
  US09/729,701
• Publication Number:
  US 20010000940A1
• Time in Patent Office: Days
• US Class Current: 310/326
• CPC Class Codes: H02N 2/0065 Friction interface friction linings F16D69/00
• CPC Class Codes: H02N 2/007 Materials
• CPC Class Codes: H02N 2/163 Motors with ring stator
• CPC Class Codes: Y10T 29/42 Piezoelectric device making

Abstract

In a vibration type driving apparatus comprising a vibration member of which the vibration is excited, and a contacting member contacting with the vibration member, the contacting member and the vibration member being moved relative to each other by the vibration of the vibration member, a friction member is provided on the contacting portion of at least one of the vibration member and the contacting member, and the friction member is formed with a contacting surface smoothed by the pressing of a mold.

Claims

1. A vibration type driving apparatus comprising:

a vibration member of which the vibration is excited; and

a contacting member contacting with said vibration member, said contacting member and said vibration member being moved relative to each other by the vibration of said vibration member;

wherein a friction member is provided on the contacting portion of at least one of said vibration member and said contacting member, and said friction member is formed with a contacting surface smoothed by the pressing of a mold.

2. A vibration type driving apparatus according to

claim 1

, wherein the formation of said contacting surface by the pressing of said mold is effected with heating.

3. A vibration type driving apparatus according to

claim 1

, wherein the formation of said contacting surface by the pressing of said mold is effected by a press forming method.

4. A vibration type driving apparatus according to

claim 1

, wherein the formation of said contacting surface by the pressing of said mold is effected by an ultrasonic working method.

5. A vibration type driving apparatus according to

claim 1

, wherein said friction member is a material including a resin material.

6. A vibration type driving apparatus according to

claim 2

, wherein said friction member is a material including a resin material.

7. A vibration type driving apparatus according to

claim 3

, wherein said friction member is a material including a resin material.

8. A vibration type driving apparatus according to

claim 1

, wherein said friction member is set so that the ridgeline portion of the contacting portion of a partner side contacting said friction member is in non-contact with said friction member.

9. A vibration type driving apparatus according to

claim 8

, wherein said friction member is formed with a depressed portion, and is in non-contact with said ridgeline portion of the contacting portion of said partner side.

10. A vibration type driving apparatus according to

claim 8

, wherein said friction member is formed with a protruding portion, and is in non-contact with said ridgeline portion of the contacting portion of said partner side.

11. A vibration type driving apparatus according to

claim 9

, wherein said depressed portion of said friction member is formed at the same time by the pressing of said contacting surface by said mold.

12. A vibration type driving apparatus according to

claim 10

, wherein said protruding portion of said friction member is formed at the same time by the pressing of said contacting surface by said mold.

13. An apparatus for driving an object to be driven by using the vibration type driving apparatus according to

claim 1

as a drive source.

14. A vibration type driving apparatus comprising:

a vibration member of which the vibration is excited; and

a contacting member contacting with said vibration member, said contacting member and said vibration member being moved relative to each other by the vibration of said vibration member;

wherein a friction member is provided on the contacting portion of at least one of said vibration member and said contacting member, and said friction member is formed of a resin composition containing heat-resisting resin and mesophased pitch carbon fiber.

15. A vibration type driving apparatus according to

claim 14

, wherein said mesophased pitch carbon fiber is carbonic.

16. A vibration type driving apparatus according to

claim 14

, wherein said mesophased pitch carbon fiber comprises short fiber.

17. A vibration type driving apparatus according to

claim 14

, wherein the content of said mesophased pitch carbon fiber is 10 to 30% by weight.

18. A vibration type driving apparatus according to

claim 14

, wherein said heat-resisting resin includes fluororesin.

19. A vibration type driving apparatus according to

claim 14

, wherein said heat-resisting resin includes polyimide resin.

20. A vibration type driving apparatus according to

claim 14

, wherein said resin composition contains molybdenum disulfide.

21. A vibration type driving apparatus according to

claim 14

, wherein said resin composition contains polyimide powder.

22. An apparatus for driving an object to be driven by using the vibration type driving apparatus according to

claim 14

as a drive source.