Vibrational wave driving apparatus

Patent metadata

Field	Value
Publication number	US-9369067-B2
Application number	US-201313913136-A
Country	US
Kind code	B2
Filing date	Jun 7, 2013
Priority date	Jun 15, 2012
Publication date	Jun 14, 2016
Grant date	Jun 14, 2016

Abstract

A vibrational wave driving apparatus in the present invention includes an elastic member attached to an electromechanical energy transducing member, a pair of electrodes provided on the electromechanical energy transducing member, a wiring unit connecting the pair of electrodes and a voltage applying unit, and a driven body configured to be pressure contacted with the elastic member. The driven body is relatively driven by mechanical vibration of the elastic member generated when an alternating voltage is applied to the pair of electrodes. The wiring unit includes a pair of wiring portions connected to the pair of electrodes, respectively. The pair of wiring portions includes a pair of film-like bases and a pair of conductors formed on surfaces of the pair of film-like bases. The pair of wiring portions is arranged such that the pair of conductors overlaps each other through insulating layers.

First claim

What is claimed is:

1. A vibrational wave driving apparatus comprising:
a plate-shaped electromechanical energy transducing member including a first surface and a second surface that is opposite the first surface;
an elastic member attached to the electromechanical energy transducing member on a side of the second surface of the electromechanical energy transducing member;
a pair of electrodes provided on the first surface and the second surface, respectively, of the electromechanical energy transducing member;
a voltage applying unit configured to apply a voltage to the pair of electrodes;
a wiring unit connecting the pair of electrodes and the voltage applying unit; and
a driven body configured to be pressure contacted with the elastic member,
wherein the driven body is relatively driven by mechanical vibration of the elastic member generated when an alternating voltage is applied to the pair of electrodes,
wherein the wiring unit includes a pair of wiring portions connected to the pair of electrodes, respectively,
wherein the pair of wiring portions includes a pair of film-like bases and a pair of conductors formed on surfaces of the pair of film-like bases, and
wherein the pair of wiring portions is arranged such that the pair of conductors overlaps each other through insulating layers.

2. The vibrational wave driving apparatus according to claim 1 ,
wherein the pair of electrodes has the same shape and is composed of the same material.

3. The vibrational wave driving apparatus according to claim 1 ,
wherein the pair of electrodes includes a first electrode formed on the first surface and a second electrode formed on the second surface,
wherein the pair of conductors includes a first conductor connected to the first electrode and a second conductor connected to the second electrode, and
wherein the second electrode and the second conductor are connected to each other through a via hole in the electromechanical energy transducing member.

4. The vibrational wave driving apparatus according to claim 3 ,
wherein the first conductor includes a circular exposure portion formed at an end of the first conductor and a lead portion connected to the exposure portion,
wherein the second conductor includes an annular exposure portion formed at an end of the second conductor and a lead portion connected to the exposure portion,
wherein the insulating layers include a first insulating layer that is arranged between the first conductor and the second conductor and that includes a hole corresponding to the circular exposure portion and a second insulating layer that is arranged between the first conductor and the first electrode and that includes a hole corresponding to the annular exposure portion,
wherein the circular exposure portion is connected to the via hole through the hole in the second insulating layer and the hole in the first insulating layer, and
wherein the annular exposure portion is connected to the first electrode through the hole in the second insulating layer.

5. The vibrational wave driving apparatus according to claim 4 ,
wherein the lead portion of the first conductor and the lead portion of the second conductor are arranged in such a way as to overlap each other.

6. The vibrational wave driving apparatus according to claim 1 ,
wherein the electromechanical energy transducing member has a disc shape,
wherein the pair of electrodes includes a plurality of first electrodes formed on the first surface and second electrodes formed on the second surface in correspondence with the plurality of first electrodes,
wherein the plurality of first electrodes include first electrodes in a first group and first electrodes in a second group, and
wherein a first wiring portion that short-circuits the first electrodes in the first group and a second wiring portion that short-circuits the first electrodes in the second group are included.

7. The vibrational wave driving apparatus according to claim 6 ,
wherein the second electrodes include second electrodes in the first group having shapes corresponding to shapes of the first electrodes in the first group and second electrodes in the second group having shapes corresponding to shapes of the first electrodes in the second group, and
wherein a third wiring portion that short-circuits the second electrodes in the first group and a fourth wiring portion that short-circuits the second electrodes in the second group are included.

8. The vibrational wave driving apparatus according to claim 7 ,
wherein the first wiring portion and the third wiring portion have the same shape, and the second wiring portion and the fourth wiring portion have the same shape.

9. The vibrational wave driving apparatus according to claim 6 ,
wherein the second electrodes include an arc-shaped electrode having a uniform width corresponding to the first electrodes in the first group and an arc-shaped electrode having a uniform width corresponding to the first electrodes in the second group.

10. The vibrational wave driving apparatus according to claim 9 ,
wherein the first wiring portion has a shape corresponding to the arc-shaped electrode having the uniform width corresponding to the first electrodes in the first group, and
wherein the second wiring portion has a shape corresponding to the arc-shaped electrode having the uniform width corresponding to the first electrodes in the second group.

11. The vibrational wave driving apparatus according to claim 6 ,
wherein the pair of conductors includes a first conductor connected to the first wiring portion and a second conductor connected to the second wiring portion, and
wherein the second wiring portion and the second conductor are connected to each other through a via hole in the electromechanical energy transducing member.

12. The vibrational wave driving apparatus according to claim 6 ,
wherein the pair of conductors includes a first conductor connected to the first wiring portion and a second conductor connected to the second wiring portion, and
wherein the second wiring portion and the second conductor are connected to each other through a side surface connection portion provided on a side surface of the electromechanical energy transducing member.

Assignees

• Canon Kk

Inventors

• Fujimoto Kosuke

Classifications

• H02N2/0035

  Cylindrical vibrators · CPC title

• H02N2/163

  Motors with ring stator · CPC title

• H02N2/026

  by pressing one or more vibrators against the driven body · CPC title

• H02N2/103

  by pressing one or more vibrators against the rotor · CPC title

• H02N2/0085 Primary

  Leads; Wiring arrangements · CPC title