Piezo drive system
AssigneeTaiyo Yuden Co., Ltd.
InventorsYutaka Doshida, Taisei Irieda
Life of this patent
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Abstract
A piezo drive system includes an elastic fixing frame, a drive element, a rod, and a rotor. A vamplate portion is formed on the outer surface of the rod. One end of the rod is secured to around the center of a face of the drive element. The rotor consists of a cylindrical portion and a disk portion, and can rotate relative to the rod. Protrusions are formed on the inside of a top surface portion of the fixing frame to push against the disk portion. Using the drive element, the rod rotates while tilting and makes a surface contact with the vamplate portion, producing friction. Consequently, the rotor is rotated.
Claims18
A piezo drive system comprising:
- a piezo drive element having a first face and a second face opposite to the first face;
- a rod having one end secured to the first face of the piezo drive element, the rod having a shaft portion extending upwardly, the shaft portion having an outer surface having a vamplate portion, the shaft portion having a front portion located closer to a front end of the rod than is the vamplate portion;
- a rotor into which the front portion of the shaft portion can be inserted, the rotor making a surface contact with the vamplate portion, the rotor being capable of rotating relative to the rod;
- and
- a preloading unit for pushing the rotor against the vamplate portion of the rod;
- wherein the piezo drive element causes the rod to produce a torque, thus rotationally driving the rotor.
Dependencies are inferred from the claim text.