US5274295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibration driven motor
Assignee: Canon Inc
•
Filing: 1992-12-18
•
Granted: 1993-12-28
•
Expires: 2012-12-18
Abstract
Abstract The contact portion of a movable member is endowed with a spring property to thereby effect uniform contact over the entire circumference of the movable member, thereby realizing an ultrasonic motor which is good in efficiency and suffers little from the occurrence of sounds.
Inventors
- 👤 Takayuki Tsukimoto
- 👤 Takashi Maeno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:28
CPC Classifications
H; H02; H02N; H02N2/00; H02N2/0005; H02N2/005; H02N2/0065; H02N2/10; H02N2/106
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
153 words
A vibration driven motor comprising: a vibration member having a contact surface, said member generating therein at least two vibrations in different planes and having a phase difference in time therebetween in response to an applied electrical signal; and a contact member having a contact portion provided in contact with the contact surface of said vibration member and for receiving a combined vibration of said two vibrations as a driving force from said vibration member, said contact portion having a spring characteristic which satisfies a relation: Fsinβ Kt<N μ where, F is an amount of vibration deviation of the vibration member at the contact portion of the contact member and said contact surface; N is a vertical drag; μ is a fraction coefficient; β is an angle formed by a direction perpendicular to the contact surface and the vibration deviation; and Kt is a hardness in a direction parallel to the contact surface.
Claim 2
Dependent Claim
153 words
A vibration driven motor comprising: a vibration member having a contact surface, said member generating therein at least two vibrations in different planes and having a phase difference in time therebetween in response to an applied electrical signal; and a contact member having a contact portion provided in contact with the contact surface of said vibration member and for receiving a combined vibration of said two vibrations as a driving force from said vibration member, said contact portion having a spring characteristic which satisfies a relation: Fsinβ Kt<N μ where, F is an amount of vibration deviation of the vibration member at the contact portion of the contact member and said contact surface; N is a vertical drag; μ is a fraction coefficient; β is an angle formed by a direction perpendicular to the contact surface and the vibration deviation; and Kt is a hardness in a direction parallel to the contact surface.
Claim 3
Dependent Claim
20 words
A vibration driven motor according to claim 1, wherein the contact surface of said vibration member includes a tapered portion.
Claim 4
Dependent Claim
28 words
A vibration driven motor according to claim 2, wherein said contact portion is of a shape which makes surface contact with the tapered portion of said contact surface.
Claim 5
Dependent Claim
16 words
A vibration driven motor according to claim 1, wherein said contact portion has a U-shaped portion.
Claim 6
Dependent Claim
152 words
A vibration driven actuator comprising: a vibration member having a contact surface, said member generating therein at least two vibrations in different planes and having a phase difference in time therebetween in response to an applied electrical signal; and a contact member having a contact portion provided in contact with the contact surface of said vibration member and for receiving a combined vibration of said two vibrations as a driving force from said vibration member, said contact portion having a spring characteristic which satisfies a relation: Fsin βKt<Nμ where, F is an amount of vibration deviation of the vibration member at the contact portion of the contact member and said contact surface; N is a vertical drag; μ is a friction coefficient; μ is an angle formed by a direction perpendicular to the contact surface and the vibration deviation; and Kt is a hardness in a direction parallel to the contact surface.
Claim 7
Dependent Claim
152 words
A vibration driven actuator comprising: a vibration member having a contact surface, said member generating therein at least two vibrations in different planes and having a phase difference in time therebetween in response to an applied electrical signal; and a contact member having a contact portion provided in contact with the contact surface of said vibration member and for receiving a combined vibration of said two vibrations as a driving force from said vibration member, said contact portion having a spring characteristic which satisfies a relation: Fsin βKt<Nμ where, F is an amount of vibration deviation of the vibration member at the contact portion of the contact member and said contact surface; N is a vertical drag; μ is a friction coefficient; μ is an angle formed by a direction perpendicular to the contact surface and the vibration deviation; and Kt is a hardness in a direction parallel to the contact surface.
Claim 8
Dependent Claim
20 words
A vibration driven actuator according to claim 5, wherein the contact surface of said vibration member includes a tapered portion.
Claim 9
Dependent Claim
28 words
A vibration driven actuator according to claim 6, wherein said contact portion is of a shape which makes surface contact with the tapered portion of said contact surface.
Claim 10
Dependent Claim
155 words
A contact device for a motor having a vibration member having a contact surface and for generating at least two vibrations in different planes and having a phase difference in time therebetween in response to an applied electrical signal, said device comprising: a contact member having a contact portion provided in contact with the contact surface of said vibration member and for receiving a combined vibration of said two vibrations as a driving force from said vibration member, said contact portion having a spring characteristic which satisfies a relation: FsinβKt<N μ where, F is an amount of vibration deviation of the vibration member at the contact portion of the contact member and said contact surface; N is a vertical drag; μ is a friction coefficient; β is an angle formed by a direction perpendicular to the contact surface and the vibration deviation; and Kt is a hardness in a direction parallel to the contact surface.
Claim 11
Dependent Claim
155 words
A contact device for a motor having a vibration member having a contact surface and for generating at least two vibrations in different planes and having a phase difference in time therebetween in response to an applied electrical signal, said device comprising: a contact member having a contact portion provided in contact with the contact surface of said vibration member and for receiving a combined vibration of said two vibrations as a driving force from said vibration member, said contact portion having a spring characteristic which satisfies a relation: FsinβKt<N μ where, F is an amount of vibration deviation of the vibration member at the contact portion of the contact member and said contact surface; N is a vertical drag; μ is a friction coefficient; β is an angle formed by a direction perpendicular to the contact surface and the vibration deviation; and Kt is a hardness in a direction parallel to the contact surface.
Claim 12
Dependent Claim
161 words
A vibration driven system comprising: a vibration member having a contact surface, said member generating therein at least two vibrations in different planes and having a phase difference in time therebetween in response to an applied electrical signal; a contact member having a contact portion provided in contact with the contact surface of said vibration member and for receiving a combined vibration of said two vibrations as a driving force from said vibration member, said contact portion having a spring characteristic which satisfies a relation: Fsin βKt<N μ where F is an amount of vibration deviation of the vibration member at the contact portion of the contact member and said contact surface; N is a vertical drag; μ is a friction coefficient; β is an angle formed by a direction perpendicular to the contact surface and the vibration deviation; and Kt is a hardness in a direction parallel to the contact surface; and a driving mechanism driven by said contact member.
Claim 13
Dependent Claim
161 words
A vibration driven system comprising: a vibration member having a contact surface, said member generating therein at least two vibrations in different planes and having a phase difference in time therebetween in response to an applied electrical signal; a contact member having a contact portion provided in contact with the contact surface of said vibration member and for receiving a combined vibration of said two vibrations as a driving force from said vibration member, said contact portion having a spring characteristic which satisfies a relation: Fsin βKt<N μ where F is an amount of vibration deviation of the vibration member at the contact portion of the contact member and said contact surface; N is a vertical drag; μ is a friction coefficient; β is an angle formed by a direction perpendicular to the contact surface and the vibration deviation; and Kt is a hardness in a direction parallel to the contact surface; and a driving mechanism driven by said contact member.
Claim 14
Dependent Claim
147 words
A vibration driven motor, comprising: a vibration member having a contact surface, said member generating therein at least two vibrations having a phase difference in time therebetween in response to an applied electrical signal; and a contact member having a contact portion provided in contact with the contact surface of said vibration member and for receiving a combined vibration of said two vibrations as a driving force from said vibration member, said contact portion having a spring characteristic which satisfies a relation; FsinβKt<Nμ where, F is an amount of vibration deviation of the vibration member at the contact portion of the contact member and said contact surface; N is a vertical drag; μ is a friction coefficient; β is an angle formed by a direction perpendicular to the contact surface and the vibration deviation; and Kt is a hardness in a direction parallel to the contact surface.
Claim 15
Dependent Claim
147 words
A vibration driven motor, comprising: a vibration member having a contact surface, said member generating therein at least two vibrations having a phase difference in time therebetween in response to an applied electrical signal; and a contact member having a contact portion provided in contact with the contact surface of said vibration member and for receiving a combined vibration of said two vibrations as a driving force from said vibration member, said contact portion having a spring characteristic which satisfies a relation; FsinβKt<Nμ where, F is an amount of vibration deviation of the vibration member at the contact portion of the contact member and said contact surface; N is a vertical drag; μ is a friction coefficient; β is an angle formed by a direction perpendicular to the contact surface and the vibration deviation; and Kt is a hardness in a direction parallel to the contact surface.
Claim 16
Dependent Claim
133 words
A vibration driven actuator comprising: a vibration member having a contact surface, said member generating therein a vibration in response to an applied electrical signal; and a contact member having a contact portion provided in contact with the contact surface of said vibration member and for receiving the vibration as a driving force from said vibration member, said contact portion having a spring characteristic which satisfies a relation: FsinβKt<Nμ where, F is an amount of vibration deviation of the vibration member at the contact portion of the contact member and said contact surface; N is a vertical drag; μ is a friction coefficient; β is an angle formed by a direction perpendicular to the contact surface and the vibration deviation; and Kt is a hardness in a direction parallel to the contact surface.
Claim 17
Dependent Claim
133 words
A vibration driven actuator comprising: a vibration member having a contact surface, said member generating therein a vibration in response to an applied electrical signal; and a contact member having a contact portion provided in contact with the contact surface of said vibration member and for receiving the vibration as a driving force from said vibration member, said contact portion having a spring characteristic which satisfies a relation: FsinβKt<Nμ where, F is an amount of vibration deviation of the vibration member at the contact portion of the contact member and said contact surface; N is a vertical drag; μ is a friction coefficient; β is an angle formed by a direction perpendicular to the contact surface and the vibration deviation; and Kt is a hardness in a direction parallel to the contact surface.
Claim 18
Dependent Claim
143 words
A contact device for a motor having a vibration member having a contact surface and for generating at least two vibrations in response to an applied electrical signal, said device comprising: a contact member having a contact portion provided in contact with the contact surface of said vibration member and for receiving a combined vibration of said two vibrations as a driving force from said vibration member, said contact portion having a spring characteristic which satisfies a relation: FsinμKt<Nμ where, F is an amount of vibration deviation of the vibration member at the contact portion of the contact member and said contact surface; N is a vertical drag; μ is a friction coefficient; β is an angle formed by a direction perpendicular to the contact surface and the vibration deviation; and Kt is a hardness in a direction parallel to the contact surface.
Claim 19
Dependent Claim
143 words
A contact device for a motor having a vibration member having a contact surface and for generating at least two vibrations in response to an applied electrical signal, said device comprising: a contact member having a contact portion provided in contact with the contact surface of said vibration member and for receiving a combined vibration of said two vibrations as a driving force from said vibration member, said contact portion having a spring characteristic which satisfies a relation: FsinμKt<Nμ where, F is an amount of vibration deviation of the vibration member at the contact portion of the contact member and said contact surface; N is a vertical drag; μ is a friction coefficient; β is an angle formed by a direction perpendicular to the contact surface and the vibration deviation; and Kt is a hardness in a direction parallel to the contact surface.
Claim 20
Dependent Claim
148 words
A vibration driven system comprising: a vibration member having a contact surface, said member generating therein at least two vibrations in response to an applied electrical signal; a contact member having a contact portion provided in contact with the contact surface of said vibration member and for receiving a combined vibration of said two vibrations as a driving force from said vibration member, said contact portion having a spring characteristic which satisfies a relation: FsinβKt<Nμ where, F is an amount of vibration deviation of the vibration member at the contact portion of the contact member and said contact surface; N is a vertical drag; μ is a driction coefficient; β is an angle formed by a direction perpendicular to the contact surface and the vibration deviation; and Kt is a hardness in a direction parallel to the contact surface; and a driving mechanism driven by said contact member.
Claim 21
Dependent Claim
148 words
A vibration driven system comprising: a vibration member having a contact surface, said member generating therein at least two vibrations in response to an applied electrical signal; a contact member having a contact portion provided in contact with the contact surface of said vibration member and for receiving a combined vibration of said two vibrations as a driving force from said vibration member, said contact portion having a spring characteristic which satisfies a relation: FsinβKt<Nμ where, F is an amount of vibration deviation of the vibration member at the contact portion of the contact member and said contact surface; N is a vertical drag; μ is a driction coefficient; β is an angle formed by a direction perpendicular to the contact surface and the vibration deviation; and Kt is a hardness in a direction parallel to the contact surface; and a driving mechanism driven by said contact member.
References Cited (Backward Citations)
SU794685A1
Cited
US4210837A
Cited
US4548090A
Cited
SU1070628A1
Cited
USRE33390E
Cited
US4663556A
Cited
US4692650A
Cited
US4728843A
Cited
EP0301429A2
Cited
US4884002A
Cited
JPH0255584A
Cited
US5028833A
Cited
EP0401762A2
Cited
EP0406843A2
Cited
EP0458638A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-12-27 | 1997-06-28 | 1997-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-12-27 | 2001-06-28 | 2001-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-12-27 | 2005-06-28 | 2005-12-28 | $7700.00 | Window Closed / Lapsed |