Method for converting standing wave vibrations into motion and standing wave motor therefor
AssigneeNippon Seimitsu Kogyo Kabushiki Kaisha
InventorTamotsu Iijima
Life of this patent
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Abstract
Standing wave vibrations which are generated in an elastic vibration member by a vibrator can be effectively converted into a linear or rotary motion by transmitting the standing wave vibrations to a moving member through motion extracting means which are arranged on the vibration member at intervals of half wavelength of the standing wave and each located on a portion substantially exclusive of the node and loop of the standing wave. According to this method, a linear or rotary motor of high performance can be accomplished.
Claims27
A standing wave motor which is driven by converting standing wave vibrations into motion, comprising an elastic vibration member;
- at least one vibrator disposed on said vibration member and adapted to generate a standing wave having a fixed wavelength in said vibration member by applying a periodic voltage of fixed frequency thereto, said vibration member having a length substantially equal to integral multiples of the half wavelength of the standing wave generated in said vibration member;
- at least one row of motion extracting means integrally formed on at least one surface of said vibration member in the shape of protrusions and located within at least one of the odd or even numbered sections of quarter wavelength sections defined by equally dividing each wavelength of the standing wave into four and at a portion substantially exclusive of a loop and a node of the standing wave, said motion extracting means each having a width less than quarter the wavelength of the standing wave generated in said vibration member in longitudinal direction relative to said vibration member;
- and at least one moving member being in contact with said motion extracting means on the vibration member thereby to cause relative motion of the vibration member and the moving member by transmitting amplitude motion of the standing wave generated in the vibration member to the moving member through the motion extracting means.
A standing wave motor which is driven by converting standing wave vibrations into motion, comprising an elastic vibration member;
- at least one vibrator disposed on said vibration member and adapted to generate a standing wave having a fixed wavelength in said vibration member by applying a periodic voltage of fixed frequency thereto, said vibration member having a length substantially equal to integral multiples of the half wavelength of the standing wave generated in said vibration member;
- motion extracting means separately formed on at least one surface of said vibration member;
- a retainer for retaining said motion extracting means so as to locate said motion extracting means within at least one of the odd or even numbered sections of quarter wavelength sections defined by equally dividing each wavelength of the standing wave into four and at a portion substantially exclusive of a loop and a node of the standing wave;
- and at least one moving member being in contact with said motion extracting means on the vibration member, thereby to cause relative motion of the vibration member and the moving member by transmitting amplitude motion of the standing wave generated in the vibration member to the moving member through the motion extracting means.
A standing wave motor which is driven by converting standing wave vibrations into motion, comprising,
- an elastic vibration member;
- at least one vibrator disposed on said vibration member and adapted to generate a standing wave having a fixed wavelength in said vibration member by applying a periodic voltage of fixed frequency thereto, said vibration member having a length substantially equal to integral multiples of the half wavelength of the standing wave generated in said vibration member;
- at least one row of motion extracting means separately formed on at least one surface of said vibration member and each of said motion extracting means being located within at least one of the odd or even numbered sections of quarter wavelength sections defined by equally dividing each wavelength of the standing wave into four and at a portion substantially exclusive of a loop and a node of the standing wave;
- and
- a retainer for retaining said motion extracting means in the state contacting with said vibration member, whereby said motion extracting means is driven by applying amplitude motion of the standing wave generated in the vibration member to said motion extracting means so as to extract as an output a motion imparted to said motion extracting means.
Dependencies are inferred from the claim text.