JPH1080166A - Vibration driving device and apparatus with vibration driving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration driving device which is low-cost and which can detect a movement amount with a simple configuration by a method in which the rotation of a guide member is detected by a detection means. SOLUTION: When voltages, at a specific frequency, whose value is different from each other by 90 deg. are applied in a state that an A-phase electrode film and a B-phase electrode film at a vibrator are set to continuity, a piezoelectric element repeats expansion and contraction motions whose phase is different by 90 deg.. As a result, a moving body 4 is moved by an elliptical motion. When the moving body 4 is moved, a guide member 7b which is supported by ball bearings 8b, 8d is turned, and also a light-shielding plate 9 is turned. When the light-shielding plate 9 is turned, a beam of light from a light source at a photointerrupter 10 is shielded intermittently by the light-shielding plate 9. At this time, an intermittent output signal is output from the output terminal of the photointerrupter 10, the output signal is counted by a pulse detection circuit which is connected to the photointerrupter 10, and the movement amount of the moving body 4 can be detected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear vibration driving device and an apparatus having the vibration driving device, and more particularly to an encoder for detecting a position.

[0002]

2. Description of the Related Art In a linear vibration driving device utilizing vibration waves, a vibrating body formed in a rectangular plate shape is vibrated, and a moving body (moving member) brought into contact with the vibrating body is linearly driven. For example, such a vibration drive device is configured as shown in FIG.

In FIG. 1, reference numeral 111 denotes an elastic body formed of an elastic material such as a metal, and 112a and 112b denote piezoelectric elements for exciting the elastic body 111 to vibrate. The vibrating body is composed of the elastic body 111 and the piezoelectric elements 112a and 112b.

Further, 114a, 114b, 114c,
114d is an electrode film for applying a voltage of a specific frequency to the piezoelectric elements 112a and 112b, and 115 is a moving body. Reference numeral 116 denotes a pressing spring for pressing the moving body 115 against the elastic body 111 with an appropriate force, and 117 denotes a bearing for reducing frictional resistance between the pressing spring 116 and the moving body 115.

[0005] In the linear vibration driving device constructed as described above, a voltage control circuit (not shown) controls the electrode film 11.
4a and 114d (A-phase electrode film), 114b and 114c
With the (B-phase electrode film) conductive, voltages of specific frequencies (indicated by sin and cos in the figure) having phases different from each other by 90 degrees are applied to the A-phase electrode film 114a and the B-phase electrode film 114b. Then, the piezoelectric elements 112a and 112b repeat expansion and contraction at the frequency. This piezoelectric element 112a, 1
A longitudinal vibration (for example, a first mode vibration) and a bending vibration (for example, a fourth mode vibration) are excited in the elastic body 111 by the expansion and contraction of 12b, and the moving body 115 is generated by combining these vibrations (standing wave). A driving wave is formed for the movement. Then, by combining the standing waves, each mass point on the surface of the elastic body 111 performs an elliptical motion as a driving wave that rotates in the same direction.

For this reason, when the moving body 115 is brought into pressure contact with the elastic body 111, the moving body 115
Is driven in the direction of the arrow in the figure. The elastic body 111 is provided with motion extractors 113a and 113b for amplifying the elliptical motion and transmitting the amplified elliptic motion to the moving body 115.

[0007]

In the linear vibration driving device described above, it is necessary to detect the amount of movement of the moving body 115 for controlling the moving body 115. Means for detecting the amount of movement of the moving body 115 include, for example, a detecting means proposed by the present applicant and
There is a detecting means proposed in Japanese Patent Application Laid-Open No. 125460.

In the detecting means proposed by the present applicant, a magnetic scale made of a magnetic recording medium magnetized at equal intervals is attached to a part of the guide bar in the axial direction. The member includes a magnetism detecting element such as a magnetoresistive element or a Hall element that senses the magnetization of the magnetic scale, and detects the amount of movement of the moving body (lens holding member).

However, in this detection means, since a part of the guide bar is magnetized, the guide bar needs to be made of a magnetic material, and the surface accuracy of the guide bar to be used must be controlled on the order of submicrons. Therefore, there has been a problem that it becomes very expensive overall.

It is an object of the first invention according to the present application to provide a vibration drive device which can detect the amount of movement with a simple and inexpensive structure.

A second object of the present invention is to provide an apparatus having a vibration driving device capable of positioning a driven unit driven by using the vibration driving device as a driving source with high accuracy.

[0012]

A first configuration for realizing the object of the first invention according to the present application is a vibrating body that vibrates an elastic body by an electro-mechanical energy conversion element, and houses the vibrating body. A case member, a guide member rotatably supported by the case member, a contact member arranged to be in contact with the guide member and the vibrating body, and extending in a moving direction; and A vibration driving device that has a pressing unit that presses and contacts the guide member and that relatively moves the case member and the contact member by vibration formed in the vibrating body, wherein rotation of the guide member is detected. A vibration drive device comprising a detection unit.

A second configuration for realizing the object of the first invention according to the present application is characterized in that, in the first configuration, a plurality of the detecting units are provided with a rotation detection phase shifted. Vibration driving device.

According to a third configuration for realizing the object of the first invention according to the present application, in the above-mentioned first or second configuration, the detecting means comprises: a light source supported by the case member; A vibration drive device, comprising: a light receiving unit supported by a member and receiving a light beam from the light source; and a light shielding plate attached to the guide member and blocking the light beam from the light source. It is in.

According to a fourth configuration for realizing the object of the first invention according to the present application, in the first or second configuration described above, the detecting means includes a brush mechanism formed on the case member, A vibration drive device is an encoder that is an encoder that is attached to a guide member and includes a pulse plate having a pattern portion divided into a conductive portion and an insulating portion.

According to a fifth configuration for realizing the object of the first invention according to the present application, in the first or second configuration described above, the detecting means includes: a magnetic sensing element formed on the case member; And a magnetic scale plate having a magnetic pole portion attached to the guide member and having magnetic poles continuously magnetized at a predetermined pitch.

A sixth configuration for realizing the object of the first invention according to the present application is the vibration driving device, wherein in each of the above-mentioned configurations, the vibrator is formed in a rectangular plate shape. .

According to a seventh aspect of the present invention for achieving the object of the first invention, in each of the above aspects, the guide member is rotatably attached to the case member via a ball bearing. The feature is a vibration drive device.

According to an eighth configuration for realizing the object of the first invention according to the present application, in the above-mentioned seventh configuration, the coefficient of friction between the contact member and the guide member is determined by comparing the coefficient of friction between the guide member and the ball bearing with each other. The vibration driving device is characterized in that the coefficient of friction is sufficiently larger than the coefficient of friction.

According to a ninth configuration for realizing the object of the first invention according to the present application, in the above-described fourth configuration, the coefficient of friction between the brush mechanism and the pulse plate is determined by changing the moving member and the guide member. The vibration drive device is characterized in that the coefficient of friction is sufficiently smaller than the coefficient of friction. A first configuration for realizing the object of the second invention according to the present application is an apparatus having a vibration driving device characterized in that a driven body is driven using the vibration driving device of each of the above-described configurations as driving means. .

A second configuration for realizing the object of the second invention according to the present application is characterized in that in the apparatus having the above-mentioned vibration driving device, the driven body is a lens.

According to the above arrangement, the detecting means detects the rotation of the guide member, and comprises, for example, an optical encoder comprising a light shielding plate supported by the guide member, and a brush mechanism formed on the case member. A brush type encoder composed of a pulse plate supported by a guide member, a magnetic encoder composed of a magnetic sensing element formed on a case member and a magnetic scale plate supported by a guide member, and the like can be provided. Therefore, the amount of movement of the moving member can be accurately detected without hindering the movement of the moving member, and can be provided at low cost.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) FIG. 1 shows a first embodiment of a vibration wave driving device according to the present invention.

FIG. 1 is an exploded perspective view of a linear vibration driving device according to a first embodiment of the present invention. In this figure, reference numeral 1 denotes a vibrator as a vibration member serving as a drive source of a linear vibration driving device, and the vibration state is exaggerated. As shown in detail in FIG. 2, the vibrator 1 has a substantially rectangular plate-shaped elastic body 1a made of brass, phosphor bronze, stainless steel, or the like, and piezoelectric elements 1b and 1c bonded to the upper and lower surfaces of the elastic body 1a. Motion extractors 1d and 1e attached to the upper surface of piezoelectric element 1c, and piezoelectric elements 1b and 1c
The electrode films 1f, 1g, 1h, and 1i are formed so as to be divided at a predetermined width so as to be divided at the center in the longitudinal direction.

Reference numerals 2a and 2b denote vibration absorbing members for absorbing vibration of felt or the like.
It is arranged so that it may be located substantially opposite to d and 1e. Reference numeral 3 denotes a support member that supports the vibrator 1 via the vibration absorbing members 2a and 2b, and is fixed to the lower surfaces of the vibration absorbing members 2a and 2b with an adhesive or a double-sided tape. In the present embodiment, two vibration absorbing members 2a and 2b are provided, but if they are located on substantially opposite sides of the motion extractors 1d and 1e, 1
Or three or more.

Reference numeral 4 denotes a moving body which comes into contact with the motion extractors 1d and 1e and converts the elliptical motion generated in the motion extractors 1d and 1e into a linear motion. The moving body 4 has a D-shaped cross section with a flat lower surface.

Reference numeral 5 designates the moving body 4 as the motion extracting body 1 of the vibrator 1.
A pressing spring 6 for bringing d and 1e into contact with a predetermined pressing force, and 6 is a case for housing the vibrator 1. An opening having an opening area in which the support member 3 can be movably fitted in the up-down direction is formed on the lower surface of the case 6.

7a and 7b are guide members for guiding the moving body 4 in the moving direction.
Is preferably a resin, metal, or the like which has excellent wear resistance and slidability and does not deform under the pressing force of the pressing spring 5.

8a, 8b, 8c and 8d are guide members 7
a and 7b are rotatably supported ball bearings, which are fitted or press-fitted into fitting holes of ball bearing attachment portions formed on the side surface in the width direction of the case 6.
Supported. In the present embodiment, the guide members 7a,
Although a ball bearing is used as a member for rotatably supporting the member 7b, the member is not limited to this, as long as a similar effect can be obtained.

As shown in FIG. 3, two guide support portions 6a and 6b for the vibrator 1 are provided on the side surface in the width direction of the case 6, and are provided on both sides of the elastic body 1a of the vibrator 1 in the width direction. 2
The vibrator 1 is guided in the height direction of the case 6 by fitting with the convex portions 1m and 1n at the locations. The support member 3 has a protrusion 3a (not shown). The protrusion 3a fits into a hole 5a formed in the center of the pressing spring 5 in the longitudinal direction. Is positioned and supported.

The pressing spring 5 has two longitudinal ends.
It has a locking arm that is divided into both ends in the width direction and extends upward,
On the upper portions of these locking arms, convex locking portions 5c, 5c are provided.
d, 5e and 5f are formed. Further, convex locking projections 6c, 6d, 6e, 6f are formed at positions corresponding to the locking portions 5c to 5f in the case 6, respectively. Then, the locking portions 5c to 5f of the pressing spring 5 are locked by engaging with the locking protrusions 6c to 6f of the case 6, respectively. The lower portions of the locking projections 6c to 6f are each formed in a tapered shape, so that the locking portions 5c to 5f can be easily engaged from below. Further, the locking portion 5c
Since the downward length of .about.5f is longer than the vertical length of the locking projections 6c.about.6f, the vertical movement of the pressing spring 5 with respect to the case 6 is allowed.

Next, a description will be given of the moving amount detecting means of the moving body having the above configuration. Reference numeral 9 denotes a disk-shaped light-shielding plate which is press-fitted and supported on the rotating shaft of the guide member 7b, and a plurality of through holes are formed at a predetermined pitch in the circumferential direction.
Reference numeral 10 denotes a photointerrupter which is fitted and supported by being inserted from the lower surface of the case 6 into a fitting hole of a support portion 6g provided on a side surface of the case member 6 in the width direction. The photo-interrupter 10 is provided with a light source and a light-receiving unit that receives light from the light source. FIG. 4 shows an assembled perspective view when the main parts described above are assembled. As can be seen from this figure, the light shielding plate 9 attached to the guide member 7b
Are arranged so as to intermittently block light rays from the light source of the photo interrupter 10. With this configuration, an optical encoder that detects the amount of movement of the moving body 4 is formed.

Next, a brief description will be given of a driving method of the linear vibration driving device of the present embodiment. In a state where the electrode films 1e and 1h (A-phase electrode film), 1f and 1i (B-phase electrode film) of the vibrator 1 are respectively made conductive, the A-phase electrode film 1e and the B-phase electrode film 1f are in phase with each other by 90 °. When a voltage of a different specific frequency is applied via a flexible printed circuit board for application (not shown), the piezoelectric element 1a repeats expansion and contraction movements having a phase difference of 90 ° from each other in a portion corresponding to the electrode film. As a result, longitudinal vibration and bending vibration are excited in the elastic body 1a, whereby the motion extractors 1d and 1e perform an elliptical motion rotating in the same direction. This elliptical motion is caused by friction between the motion extractors 1d and 1e and the mobile
Is moved, for example, in the direction of the arrow in FIG.

When the moving body 4 moves, the guide member 7b supported by the ball bearings 8b and 8d rotates, and the light shielding plate 9 also rotates. When the light shielding plate 9 rotates, light from the light source of the photo interrupter 10 is intermittently shielded by the light shielding plate 9. At this time, the photointerrupter 10 outputs an intermittent output signal from the OUT terminal shown in FIG. 5, and the output signal is counted by a pulse detection circuit (not shown) connected to the photointerrupter 10, whereby the output signal is counted. The moving amount of the moving body 4 can be detected. In the present embodiment, the light source and the light receiving unit formed in the case 6 are photointerrupters, but the present invention is not limited to this as long as the same effect can be obtained.

Further, since the guide member 7b on which the light shielding plate 9 is mounted rotates one-to-one without slipping with respect to the movement of the moving body 4, the coefficient of friction between the moving body 4 and the guide member 7b is reduced.
It is desirable that the friction coefficient between the guide member 7b and the ball bearings 8b and 8d be sufficiently larger. As the means, the coefficient of friction between the moving body 4 and the guide member 7b is
6 (a) to 6 (c), in order to sufficiently increase the friction coefficient between the guide member 7b and the ball bearings 8b, 8d.
As shown in (1), when the rubber member 4a is attached to the moving body 4, when the coating portion 4b is formed, the portion 4c having a reduced surface roughness can be formed.

(Modification of First Embodiment) FIG.
A modification of the embodiment will be described.

In this modification, a guide member 7a is provided with a second light-shielding plate, and a case 6 is provided with a second light source and a second light source in order to determine the moving direction of the moving body 4 and improve the resolution of the sensor. And a light receiving unit for receiving the light beam of the second light source. As shown in FIG. 7, the guide members 7a, 7
b is formed into a D-shaped cross-section, while the first
Guide members 7a, 7 of the light shielding plate 9 and the second light shielding plate 709.
The engagement portion with b is formed in a D-shaped cross section hole shape.

The guide members 7a, 7b thus formed
Then, the first light shielding plate 9 and the second light shielding plate 709 are fixedly supported. At this time, in order to set the phase difference between the first light-shielding plate 9 and the second light-shielding plate 709 to 90 degrees, the flat surface of the tip end of the rotating shaft formed into a D-shaped cross-section of the guide members 7a and 7b is set. Using the reference as a reference, it is fixedly supported at the same phase using a predetermined jig. In this state, the first light shielding plate 9 and the second light shielding plate 709 are, for example, press-fitted and supported. The first light-shielding plate 9 and the second light-shielding plate 709 are so formed that the through holes formed in the respective light-shielding plates have a phase difference of 90 degrees with respect to the flat surfaces of the respective D-shaped cross-sectional holes. Is formed.

As described above, the first encoder composed of the first light shielding plate 9 and the first light source and the light receiving unit, and the second encoder composed of the second light shielding plate 709 and the second light source and the light receiving unit. Can be configured so as to have a phase difference of 90 degrees from each other, so that an encoder for determining the moving direction of the moving body 4 and increasing the resolution of the sensor can be formed.

(Second Embodiment) FIG. 8 shows a second embodiment.

FIG. 8 shows a linear vibration driving device according to a second embodiment of the present invention. In this figure, the same members as those shown in FIGS. 1 to 7 are denoted by the same reference numerals, and description thereof will be omitted.

A description will be given of the moving amount detecting means of the moving body according to the second embodiment of the present invention. In FIG.
Reference numeral 809 denotes a disk-shaped pulse plate which is press-fitted and supported on the rotating shaft of the guide member 7b, and a plurality of conductive pattern portions are formed at a predetermined pitch in the circumferential direction. Reference numeral 810 denotes a brush mechanism that is fixedly supported by the mounting screws 810c from the side surface of the case 6 with reference to the positioning pins of the support portions 806g provided on the width side surface of the case member 6. The brush mechanism 810 includes a brush portion 810a made of a conductive material having elasticity and a brush connector 810b. FIG. 9 shows an assembled perspective view when the main parts described above are assembled. As can be seen from this figure, the pulse plate 809 attached to the guide member 7b is arranged so that the brush portion 810a of the brush mechanism 810 contacts. With this configuration, a brush-type encoder that detects the amount of movement of the moving body 4 is formed.

According to the above configuration, the linear vibration driving device is driven by the means described in the first embodiment, so that when the moving body 4 moves, the ball bearings 8 move.
The guide member 7b supported by b and 8d rotates, and the pulse plate 809 also rotates. When the pulse plate 809 rotates, the brush portion 810a of the brush mechanism 810 slides with the pulse plate 809, and the brush portion 810a alternately contacts the conductive portion and the insulating portion of the pulse plate 809.

Therefore, at this time, the brush connector 810b
An intermittent output signal corresponding to the amount of movement of the moving body 4 is output from a detection circuit (not shown) connected to the controller. By counting the output signals, the amount of movement of the moving body 4 can be detected. it can.

It is to be noted that the guide member 7 is moved with respect to the movement of the moving body 4.
In order for b to rotate one-to-one without slipping, it is desirable that the means described in the first embodiment be applied to the moving body 4 in advance.

Also, the pulse plate 809 and the brush part 810a
Is preferably sufficiently smaller than the friction coefficient between the moving body 4 and the guide member 7b.

Further, in order to determine the moving direction of the moving body 4 and increase the resolution of the sensor, the configuration described in the first embodiment may be adopted.

(Third Embodiment) FIG. 10 shows a third embodiment.

FIG. 10 is an assembled perspective view of a linear vibration driving device according to a third embodiment of the present invention.
In this figure, the same components as those of the embodiment shown in FIGS. 1 to 9 are denoted by the same reference numerals, and the description thereof will be omitted.

A description will be given of a moving amount detecting means of the moving body according to the third embodiment of the present invention. In FIG. 10, reference numeral 1009 denotes a disk-shaped magnetic scale plate which is press-fitted and supported on the rotating shaft of the guide member 7b, and has a magnetic pole portion in which the magnetic poles are continuously magnetized at a predetermined pitch in the circumferential direction. Reference numeral 1010 denotes a magnetic sensing element such as a magnetoresistive element or a Hall element that is fitted and supported by being inserted from the lower surface of the case 6 into the fitting hole of the support portion 1006g provided on the widthwise side surface of the case member 6. As can be seen from this figure, the magnetic scale plate 1009 attached to the guide member 7b
Are the magnetic sensing part of the magnetic sensing element 1010 and the magnetic scale plate 1
The magnetic pole portions 009 are arranged to face each other. With this configuration, a magnetic encoder that detects the amount of movement of the moving body 4 is formed.

According to the above configuration, when the moving body 4 moves by the linear vibration driving device being driven by the means described in the first embodiment, the ball bearings 8 move.
The guide member 7b supported by b and 8d rotates, and the magnetic scale plate 1009 also rotates. Magnetic scale plate 1009
Is rotated, the magnetic sensing part of the magnetic sensing element 1010 periodically detects the magnetic pole of the magnetic pole part of the magnetic scale plate 1009.
Therefore, at this time, a detection circuit (not shown) connected to the magnetic sensing element 1010 outputs an intermittent output signal corresponding to the amount of movement of the moving body 4, and by counting the output signals, the moving body 4 can be detected.

In the present embodiment, the magnetic scale plate 1
The magnetic pole portion 009 may be formed integrally with the magnetic scale plate 1009, and there is no problem whether the magnetic pole portion is made of the same material or is attached to the magnetic scale plate 1009 with another material. In addition, the guide member 7 b
It is desirable that the means described in the first embodiment be applied to the moving body 4 in order to rotate one-to-one without slipping. Furthermore, in order to determine the moving direction of the moving body 4 and increase the resolution of the sensor, the configuration described in the first embodiment may be adopted.

In each of the above embodiments, the moving body 4 as a contact body that comes into contact with the vibrating body is moved with respect to the vibrating body. Conversely, the vibrating body is moved with respect to the contacting body. You may do so.

In each of the above embodiments, the driven body driven by the vibration driving device is not particularly shown, but the vibration driving device is provided with various devices, for example, a vibration driving device provided in a lens barrel. Alternatively, a lens as a driven body may be driven to perform an autofocus or power zoom operation, and in this case, positioning control of the lens can be performed with high accuracy.

[0055]

According to the inventions according to the first to eleventh aspects, the detecting means detects the rotation of the guide member, for example, an optical encoder and a case member comprising a light shielding plate supported by the guide member. Brush type encoder composed of a brush mechanism formed on the base member and a pulse plate supported by the guide member, and a magnetic type encoder composed of a magnetic sensing element formed on the case member and a magnetic scale plate supported on the guide member Since it can be an encoder or the like, it can be driven without hindering relative movement with the contact member.

When the lens is driven in the lens barrel, the amount of movement of the lens can be accurately detected.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a vibration drive device according to a first embodiment of the present invention.

FIGS. 2A and 2B show the vibrator of FIG. 1, wherein FIG.
Is a sectional view.

FIG. 3 is a plan view showing a support state of the vibrator of FIG. 2;

FIG. 4 is a perspective view of an encoder according to the first embodiment of the present invention.

FIG. 5 is an equivalent circuit diagram of the photointerrupter according to the first embodiment of the present invention.

FIG. 6 is a perspective view of a moving body according to the first embodiment of the present invention.

FIG. 7 is a perspective view showing a modification of the first embodiment of the present invention.

FIG. 8 is an exploded perspective view of a vibration driving device according to a second embodiment of the present invention.

FIG. 9 is a perspective view of an encoder according to a second embodiment of the present invention.

FIG. 10 is a perspective view of an encoder according to a third embodiment of the present invention.

FIG. 11 is a sectional view of a conventional linear vibration driving device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Vibrating body 1a ... Elastic body 1b ... Piezoelectric vibrating body 1d, 1e ... Motion extraction body 1f, 1g, 1h, 1i ... Electrode film 2a, 2b ... Elastic member 3 ... Elastic member support member 4 ... Moving body 5 ... Pressing spring 5a: hole portions 5c, 5d, 5e, 5f: locking portions 6: case 6a, 6b: vibrator support portions 6c, 6d, 6e, 6f: locking protrusions 7a, 7b: guide members 8a, 8b, 8c, 8d ... Ball bearing 9 ... Light shield plate 10 ... Photo interrupter 709 ... Second light shield plate 709 ... Second photo interrupter 809 ... Pulse plate 810 ... Brush mechanism 1009 ... Magnetic scale plate 1010 ... Magnetic detection element

Claims (11)

[Claims] A vibrating body for vibrating an elastic body by an electro-mechanical energy conversion element, a case member for housing the vibrating body, a guide member rotatably supported by the case member; A contact member that is disposed so as to be in contact with the vibrating body and extends in the moving direction; and a pressing unit that presses the contact member against the vibrating body and the guide member. A vibration driving device that relatively moves the case member and the contact body, further comprising a detection unit that detects rotation of the guide member. 2. The vibration driving device according to claim 1, wherein a plurality of said detecting means are provided with a rotation detection phase shifted. 3. The device according to claim 1, wherein the detecting unit includes a light source supported by the case member, a light receiving unit supported by the case member and receiving a light beam from the light source, and the guide member. A vibration driving device, comprising: a light-shielding plate attached to the light source and configured to block a light beam from the light source. 4. The device according to claim 1, wherein the detecting means has a brush mechanism formed on the case member, and a pattern portion attached to the guide member and divided into a conductive portion and an insulating portion. A vibration drive device comprising an encoder including a pulse plate. 5. The detecting means according to claim 1, wherein the detecting means is attached to the magnetic detecting element formed on the case member and the guide member, and the magnetic poles are continuously magnetized at a predetermined pitch. A vibration drive device comprising an encoder including a magnetic scale plate having a magnetic pole portion. 6. The vibration driving device according to claim 1, wherein the vibrating body is formed in a rectangular plate shape. 7. The vibration drive device according to claim 1, wherein the guide member is rotatably attached to the case member via a ball bearing. 8. The vibration driving device according to claim 7, wherein a friction coefficient between the contact member and the guide member is sufficiently larger than a friction coefficient between the guide member and the ball bearing. 9. The vibration driving device according to claim 4, wherein a coefficient of friction between the brush mechanism and the pulse plate is sufficiently smaller than a coefficient of friction between the moving member and the guide member. 10. A device having a vibration driving device, wherein the device is driven by using the vibration driving device according to claim 1 as driving means. 11. The apparatus according to claim 10, wherein the driven body is a lens.