EP0458638A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Vibration wave driven motor
Assignee: Canon Inc
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Filing: 1991-05-23
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Granted: —
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Expires: 2011-05-23
Abstract
Abstract According to this invention, a piezo-electric element (3,4) as an electro-mechanical energy conversion element is urged against a vibration member (1,2), and a vibration is excited in the vibration member by a vibration produced in the piezo-electric element. Thus, a contact member, e.g., a rotor which contacts the vibration member, and the vibration member are moved relative to each other. The rigidity of the outer side of the vibration member is larger than that of its inner side.
Inventors
- 👤 Takashi C/O Canon Kabushiki Kaisha Maeno
- 👤 Takayuki C/O Canon Kabushiki Kaisha Tsukimoto
- 👤 Jun C/O Canon Kabushiki Kaisha Tamai
- 👤 Yutaka C/O Canon Kabushiki Kaisha Maruyama
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 12:28
CPC Classifications
H; H02; H02N; H02N2/00; H02N2/10; H02N2/106
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
116 words
A vibrating device comprising: (a) a first vibrating member having a hollow portion; (b) a second vibrating member having a hollow portion; (c) an electro-mechanical energy conversion member having a hollow portion, and clamped between said first and second vibrating members, said conversion member generating a vibration wave in said first and second vibrating members in response to an applied electrical signal; (d) a fastening member fitted into the hollow portions of said first and second vibrating members, and said conversion member, for fastening said conversion member between said first and second vibrating members; and (e) a uniforming member for substantially uniforming a compression stress acting on said conversion member when said fastening member executes fastening.
Claim 2
Dependent Claim
18 words
A vibrating device according to claim 1, wherein said first vibrating member is formed of an elastic member.
Claim 3
Dependent Claim
18 words
A vibrating device according to claim 1, wherein said second vibrating member is formed of an elastic member.
Claim 4
Dependent Claim
34 words
A vibrating device according to claim 1, wherein said fastening member comprises a bolt, and the hollow portion of said first vibrating member has a threaded portion which is threadably engaged with said bolt.
Claim 5
Dependent Claim
45 words
A vibrating device according to claim 1, wherein said first vibrating member has a contact surface contacting said conversion member, and said contact surface has a recess formed in an inner peripheral portion of said first vibrating member so as to form said uniforming member.
Claim 6
Dependent Claim
14 words
A vibrating device according to claim 5, wherein said recess has a spherical shape.
Claim 7
Dependent Claim
14 words
A vibrating device according to claim 5, wherein said recess has a curved-surface shape.
Claim 8
Dependent Claim
44 words
A vibrating device according to claim 1, wherein said uniforming member is provided between one of said first and second vibrating members and said conversion member, and comprises as spacer whose thickness of an inner side is thinner than that of an outer side.
Claim 9
Dependent Claim
47 words
A vibrating device according to claim 1, wherein said uniforming member comprises a member, provided on one of said first or second vibrating member, for forming a gap between an outer circumferential surface of said fastening member, and an inner circumferential surface of said one vibrating member.
References Cited (Backward Citations)
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