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US 4,513,219 AGranted
Vibration wave motor
AssigneeCanon Kabushiki Kaisha
InventorsMakoto Katsuma, Hiroyasu Murakami, Akira Hiramatsu
Life of this patent
Estimating the term…
Abstract
A pair of electro-strain element groups each having at least one polarized or non-polarized electro-strain element are arranged or polarized phase-differentially, and the electro-strain element groups are electrically insulated from each other and the electro-strain element groups and a vibrating member are also electrically insulated from each other. Pulse voltages of different phases derived from one DC power supply are applied to the respective electro-strain element groups, and a moving member press-contacted to the vibrating member is friction-driven by a travelling vibration wave generated in the vibrating member.
Claims10
A vibration wave motor comprising:
- (a) a pair of electro-strain element groups arranged or polarized phase-differentially, each group including at least one electro-strain element;
- (b) a vibrating member for generating a travelling vibration wave by application of voltages having a phase difference therebetween to said pair of electro-strain element groups;
- (c) a moving member press-contacted to said vibrating member to be friction-driven thereby;
- (d) a DC voltage generator for generating a DC voltage which is supplied to each of said pair of electro-strain element groups;
- and
- (e) a driving circuit for substantially applying an alternating voltage to said pair of electro-strain element groups by time divisionally alternating the direction of DC voltage to be applied to said pair of electro-strain element groups.
3 more elements
A vibration wave motor comprising:
- (a) a pair of electro-strain element groups arranged or polarized phase-differentially, each group including at least one electro-strain element;
- (b) a vibrating member for generating a travelling vibration wave by application of voltages having a phase difference therebetween to said pair of electro-strain element groups, said vibrating member being disposed on first surfaces of said pair of electro-strain element groups;
- (c) a conductive vibration absorber disposed on second surfaces of said pair of electro-strain element groups, said absorber functioning as an electrode for said pair of electro-strain element groups;
- (d) a moving member press-contacted to said vibrating member to be friction-driven by the travelling wave;
- and
- (e) a power source circuit for applying a driving voltage to said pair of electro-strain element groups through said conductive vibration absorber.
3 more elements
A vibration wave motor comprising:
- a pair of electro-strain element groups arranged or polarized phase-differentially, each group including at least one electro-strain element;
- a vibrating member for generating a travelling vibration wave by application of voltages having a phase difference therebetween to said pair of electro-strain element groups, said vibrating member being disposed on first surfaces of said pair of electro-strain element groups;
- a conductive member disposed on second surfaces of said pair of electro-strain element groups, said member functioning as an electrode for said pair of electro-strain element groups;
- a moving member press-contacted to said vibrating member to be friction-driven thereby;
- and
- a power source circuit for applying a driving voltage to said pair of electro-strain element groups through said conductive member.
3 more elements
A vibration wave motor comprising:
- (a) a vibration member including electro-strain element groups arranged or polarized phase-differentially for generating a travelling vibration wave by application of voltages having a phase difference therebetween to said pair of electro-strain element groups, each group including at least one electro-strain element;
- (b) a moving member press-contacted to said vibrating member to be friction-driven thereby;
- (c) a DC voltage generator for generating a DC voltage to be supplied to said pair of electro-strain element groups;
- and
- (d) a driving circuit for substantially applying an alternating voltage to said pair of electro-strain element groups by time divisionally alternating the direction of a DC voltage to be applied to said pair of electro-strain element groups.
2 more elements
A vibration motor comprising:
- (a) a vibration member including a pair of electro-strain element groups arranged or polarized phase-differentially for generating a travelling vibration wave by application of voltages having a phase difference therebetween to said pair of electro-strain element groups, each group including at least one electro-strain element;
- (b) a conductive member disposed in contact with said pair of electro-strain element groups, said member functioning as an electrode for said pair of electro-strain element groups;
- (c) a moving member press-contacted to said vibrating member to be friction-driven thereby;
- and
- (d) a power source circuit for applying a driving voltage to said pair of electro-strain element groups through said conductive member.
2 more elements
A vibration wave motor comprising:
- (a) a vibration member including a pair of electro-strain element groups arranged or polarized phase-differentially for generating a travelling vibration wave by application of voltages having a phase difference therebetween to said pair of electro-strain element groups, each group including at least one electro-strain element;
- (b) a conductive vibration absorber disposed in contact with said pair of electro-strain element groups, said absorber functioning as an electrode for said pair of electro-strain element groups;
- (c) a moving member press-contacted to said vibrating member to be friction-driven by said travelling vibration wave thereby;
- and
- (d) a power source circuit for applying a driving voltage to said pair of electro-strain element groups through said conductive absorber.
2 more elements
Dependencies are inferred from the claim text.