JP2004073983A - Vibrator of axial driving - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable vibrator of a small size and high performance used for portable apparatus, etc., to allow a person carrying the portable apparatus etc., to silently sense an incoming call. <P>SOLUTION: The vibrator 100 of axial driving is formed by fixing a cylindrical driving coil 112 to one side end of a cylindrical frame 111. A cup-like yoke 121 consisting of a magnetic material magnetically engaging the driving coil 112 across a gap has a cup-like yoke shaft 121a. A pole piece 123 axially disposed at the tip is held between a pair of columnar permanent magnets 122a and 122b and a deadweight 128 is mounted thereon, whereby a driving element 120 is constituted. The driving element 120 is supported by a frame bearing 111a disposed at one side end of the frame 111 through the shaft 121a and is so constituted as to be vibrated at 100 to 160 Hz in an axial direction by a pair of the coil springs 124 and 125. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a configuration of a vibrating body used for a portable device or the like that makes a portable person sense an incoming call without sound.
[Prior art]
2. Description of the Related Art In public places, hospitals, vehicles such as trains and buses, the use of portable devices has been often restricted. In particular, even when the use of a portable device is permitted, a method of causing a person to sense an incoming call in a so-called manner mode (silent / feeling vibration) has been used. BACKGROUND ART As portable devices, various products have become widespread, reflecting recent and rapid technological innovation, and include, for example, mobile phones, PDAs, and wearable (wearable) computing devices. For these, a vibration motor that senses bodily vibrations without sound, a multifunction device having a function similar to that of a vibration motor (having both a speaker and a vibrating body function) and the like are used. Hereinafter, a description will be given of a typical example of a conventional vibration motor.
[0002]
Conventional examples will be described with reference to Japanese Utility Model Publication No. Hei 3-83681 (hereinafter referred to as Document A), Japanese Patent Application Laid-Open No. 7-107699 (Document B), and Japanese Patent Publication No. Hei 8-10972 (Document C). Document A uses an axial long DC motor having a brush and a commutator, and relates to an eccentric weight having a fan-shaped cross section mounted on a rotating shaft of a vibration motor. The eccentric weight is made of a powdered sintered alloy of metal containing tungsten and lead without using a bulk material of tungsten, which has a high specific gravity but is difficult to process, and facilitates fitting of the eccentric weight to the rotating shaft and vibrates. Try to increase the output.
[0003]
Document B is a vibration motor using a shaft-type DC motor having a brush and a commutator as shown in FIG. 8, and relates to the disclosure of a configuration of an eccentric weight and a method of fixing the same to a rotary shaft. In FIG. 8, a groove 335 smaller than the outer diameter of the rotating shaft 336 is provided on a rotating shaft 336 supported by a bearing 333 of the DC motor 331, and an eccentric member made of a powder sintered alloy such as tungsten formed of a material having a high specific gravity is provided. The weight 334 is swaged into the groove 335 of the rotating shaft 336 by the swaging portion 340. Therefore, the eccentric weight 334 is securely fixed to the rotary shaft 336 without the axial ends of the eccentric weight 334 rising, so that the output can be increased despite its small size. Further, it is described that the porous eccentric weight 334 is impregnated with oil and has a rust prevention effect without surface treatment by plating.
[0004]
Document C relates to a flat DC motor having a brush and a commutator. At least three coils having an opening angle of 60 to 80 ° are arranged in a fan shape so as not to overlap, and the eccentric weight is formed by a rotor. Form.
[0005]
[Problems to be solved by the invention]
Documents A, B, and C are based on the premise that a DC motor is rotated. Although there are differences between a long axis type and a flat type, there are the following difficulties. (1) Since the brush and the commutator are used, the cost is high, and there is a problem in maintenance of the life and quality due to damage by the micro arc at the time of commutation. (2) It is not suitable for a device that takes a long time to rise from 7000 to 10000 rpm and generates vibration in accordance with music.
In recent years, vibration motors are required to have a vibration device that is equipped with a vibration motor in which space efficiency is improved, the size and thickness of the device are reduced, and vibration characteristics are improved. ing. As one solution to such a demand, the technical contents described in Japanese Patent Application No. 2001-341285 (hereinafter referred to as Document D) and Japanese Patent Application No. 2002-20793 (hereinafter referred to as Document E) by the same applicant as the present application have been proposed. . Hereinafter, description will be given based on the drawings.
[0006]
5 and 6 showing the outline of Document D, the vibrating body 200 includes a cylindrical frame 211 made of synthetic resin, a driving coil 212 and a driver 220. One end of the frame 211 in the axial direction is formed by winding a magnet wire around a cylindrical coil bobbin 213 whose surface is electrically insulated by anodizing a metal material, for example, aluminum having a good heat conduction property. The drive coil 212 having 236 is fixed in a cantilever manner. The driver 220 has a cylindrical pole piece 223 made of a magnetic material disposed at the center at the center of a cup-shaped yoke 221 made of a magnetic material, and a cylindrical permanent magnet magnetized to a single magnetic pole in the axial direction. A magnet 222 is fixed in a cantilever shape, and a weight 223 formed by resin molding of, for example, tungsten powder having a large mass is fixed to the inner and outer peripheral bottom surfaces of the cup-shaped yoke 221 with an adhesive or the like. A plurality of (three in this embodiment) guide projections (214 a, 214 b, 214 c), (215 a, 215 b) in the axial direction are provided on the inner peripheral surface of the frame 211 so that the driver 220 can be smoothly driven in the axial direction. 215c) are provided. Further, the drive coil 212 and the driver 220 are magnetically engaged via circumferential gaps 226 and 227 parallel to the axial direction. That is, the magnetic flux generated by the columnar permanent magnet 222 spreads in the diameter direction at the pole piece 223 at the distal end, and interlinks with the drive coil 212 via the air gaps 226 and 227 to link the outer periphery and the bottom of the cup-shaped yoke 221. After that, a closed magnetic circuit is formed. Further, the driver 220 is supported by coil springs 224 and 225 provided at both ends of the frame 211. The primary resonance frequency of the driver 220 is determined by the mass of the driver 220 and the stiffness of the coil springs 224 and 225, and is set to 100 to 160 Hz, which is considered to be good for the wearer. The driver 220 is normally stopped at an equilibrium point by a pair of coil springs 224 and 225.
[0007]
However, although the document D is characterized by the effect of increasing the driving force and smoothing the axial vibration, solid friction occurs when the inner periphery of the frame 211 and the outer periphery of the driver 220 slide, In order to reduce the friction loss, another improvement in the characteristics has been desired.
[0008]
FIG. 7 showing the outline of document E, which is another specific example, has the following configuration. In FIG. 7, if a description is given using the same reference numerals, a vibrating body 250 of the present invention includes a cylindrical frame 211 made of synthetic resin or metal, a driving coil 212, and a driver 260. At one end in the axial direction of the frame 211, a magnet is formed on a cylindrical coil bobbin 213 coaxially with the formed frame bearing 211a by anodizing a metal material, for example, aluminum having good thermal conductivity and electrically insulating the surface. A drive coil 212 having terminals 235 and 236 formed by winding a wire is fixed in a cantilever manner. The driver 260 has a cylindrical pole piece 223 made of a magnetic material in the axial direction coaxial with a cylindrical permanent magnet 222 magnetized to a single magnetic pole at the center of a cup-shaped yoke 221 made of a magnetic material. A weight 230 formed by resin molding of, for example, tungsten powder having a large mass is fixed to the inner and outer peripheral bottom surfaces of the cup-shaped yoke 221 having the cup-shaped yoke shaft 221a with an adhesive or the like. You. At the other end of the frame 211, a bracket 232 having a bracket bearing 232a coaxial with the frame bearing 211a is provided.
[0009]
Then, between one end of the frame 211 and the bracket 232, the cup-shaped yoke shaft 221a of the driver 260 is held by coil springs 224, 225 so that the sliding surfaces of the frame bearing 211a and the bracket bearing 232a can be smoothly driven in the axial direction. Have been. In this case, the amplitude of the vibration amplitude of the driver 260 is configured to be within the sliding surface of the frame bearing 211a and the bracket bearing 232a. The magnetic flux generated by the columnar permanent magnet is engaged with the drive coil 212 via the pole pieces 223 and the cup-shaped yoke 221 via the gaps 226 and 227. Since the solid friction is generated by the pole piece shaft 223a, the cup-shaped yoke shaft 221a, the frame bearing 211a, and the bracket bearing 232a, it is understood that the solid friction is reduced as compared with the reference D. However, it is not easy to form the pole piece shaft 223a and the cup-shaped yoke shaft 221a coaxially via the columnar magnet 222, and there is a dislike that the degree of the influence of solid friction varies.
SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks and to propose an axial vibrator that can reduce solid friction, improve efficiency, and is most suitable for diversified portable devices with a simple configuration.
[0010]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a vibrating body having a cylindrical drive coil fixed to one end of a cylindrical frame and magnetically engaged with the drive coil via a gap. A driver formed of a cup-shaped yoke and a cylindrical permanent magnet or a cylindrical permanent magnet and a columnar magnetic material made of a magnetic material having a pair of coil springs provided at both ends of the frame makes the driver axially movable. It is characterized by being arranged so as to vibrate.
[0011]
According to another aspect of the present invention, there is provided a vibrating body comprising: a cup-shaped yoke made of a magnetic material; and a pair of columnar permanent magnets axially magnetized at the center of the cup-shaped yoke. A cylindrical driving pole piece made of a magnetic material is coaxially held and fixed coaxially and held on a central axis in a cantilever manner, and one side of the frame so that the central axis of the driver mechanically slides. It is characterized by being supported by end bearings.
[0012]
According to a third aspect of the present invention, there is provided a vibrating body having a ring-shaped yoke at a tip end and a central portion of a cylindrical magnet which is magnetized to a single magnetic pole in an axial direction from a magnetic material. A cylindrical yoke is fixed coaxially and held on a central axis in a cantilever manner, and is supported by bearings at both ends of a pair of the frames so that the central axis of the driver mechanically slides. It is characterized by the following.
[0013]
According to a fourth aspect of the present invention, there is provided a vibrating body comprising: a cup-shaped yoke made of a magnetic material; and a pair of columnar permanent magnets axially magnetized at a central portion of the cup-shaped yoke. And a cylindrical pole piece made of a magnetic material is coaxially held and fixed, and a sliding member is disposed in a gap between the inner peripheral surface of the cup-shaped yoke and the outer peripheral surface of the drive coil. It is.
[0014]
According to another aspect of the present invention, there is provided a vibrating body comprising: a cup-shaped yoke made of a magnetic material; and a pair of columnar permanent magnets axially magnetized at a central portion of the cup-shaped yoke. And a cylindrical pole piece made of a magnetic material is coaxially pinched and fixed, held in a cantilever manner on the center axis, and a sliding member is inserted into a gap between the inner peripheral surface of the cup-shaped yoke and the outer peripheral surface of the drive coil. The frame is arranged and supported by a bearing at one end of the frame so that the center axis of the driver element slides mechanically.
[0015]
According to a sixth aspect of the present invention, there is provided a vibrating body according to the present invention, wherein a weight is provided on the inner and outer peripheral bottom surfaces of the cup-shaped yoke.
[0016]
According to a seventh aspect of the present invention, there is provided a vibrating body, wherein a columnar pole piece made of a magnetic material is formed at a front portion of the columnar permanent magnet.
[0017]
According to another aspect of the present invention, there is provided a vibrating body wound around a cylindrical insulated metal material.
[0018]
A vibrating body according to a ninth aspect of the present invention, which has been made to solve the problem, is characterized by being driven by a bridge circuit.
[0019]
A vibrating body according to a tenth aspect of the present invention, which has been made to solve the problem, is characterized in that it is driven by a sine wave or a square wave input.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of an axially driven vibrator according to the present invention will be described with reference to the drawings. FIG. 1 is a half sectional view showing the configuration of an axially driven vibrating body (hereinafter abbreviated as a vibrating body) of the present invention. FIG. 2 is a half sectional view showing the configuration of another embodiment of the vibration body driven in the axial direction according to the present invention. FIG. 3 is a half sectional view showing the configuration of another embodiment of the axially driven vibrator according to the present invention. FIG. 4 is a half sectional view showing the configuration of another embodiment of the vibration body driven in the axial direction according to the present invention.
[0021]
In FIG. 1, a vibrating body 100 of the present invention includes a cylindrical frame 111 made of synthetic resin or metal, a driving coil 112, and a driver 120. At one end in the axial direction of the frame 111, a magnet is formed on a cylindrical coil bobbin 113 coaxially with the formed frame bearing 111a and anodized with a metal material, for example, aluminum having good heat conduction and electrically insulating the surface. The drive coil 112 formed by winding a wire is fixed in a cantilever manner. The driver 120 has a cylindrical pole piece 123 made of a magnetic material in the center of a cup-shaped yoke 121 made of a magnetic material. A weight 128 formed by resin-molding, for example, tungsten powder having a large mass is fixed to the inner and outer peripheral bottom surfaces of the cup-shaped yoke 121 with an adhesive or the like. . The cup-shaped yoke shaft 121a of the driver 120 is supported in a cantilever manner with respect to a frame bearing 111a of the frame 111, and is held by coil springs 124 and 125 so that the sliding surface can be smoothly driven in the axial direction. . In this case, the magnitude of the vibration amplitude of the driver 120 is configured to be within the sliding surface of the frame bearing 111a. The magnetic flux generated by the columnar permanent magnet 122a and the reinforcing magnet 122b is engaged with the drive coil 112 via the pole pieces 123 and the cup-shaped yoke 121 via the gaps 130 and 131. Since the solid friction is generated between the frame bearing 111a and the cup-shaped yoke shaft 121a, the solid friction is reduced as compared with the reference document D, and is effective with a simpler configuration than the reference document E.
[0022]
In FIG. 2, which is another embodiment of the present invention, if the same reference numerals are used as in FIG. 1, the vibrating body 150 of the present invention includes a cylindrical frame 111 made of synthetic resin or metal, a driving coil 112, and a driving element. 155. One end of the frame 111 in the axial direction is formed by winding a magnet wire around a cylindrical coil bobbin 113 having a surface formed by anodizing a metal material, for example, aluminum having good heat conduction and electrically insulating the surface. In addition, the drive coil 112 is fixed in a cantilever manner. The driver 155 has a cylindrical pole piece 123 made of a magnetic material in the axial direction at the center of a cup-shaped yoke 121 made of a magnetic material, coaxial with cylindrical permanent magnets 122a and 122b magnetized to a single magnetic pole. A weight 128 formed by resin molding of, for example, tungsten powder having a large mass is fixed to the inner and outer peripheral bottom surfaces of the cup-shaped yoke 121 with an adhesive or the like. The driver 155 is held by coil springs 124 and 125 so that it can be driven in the axial direction. The magnetic flux generated by the columnar permanent magnet 122a and the reinforcing magnet 122b is engaged with the drive coil 112 via the pole pieces 123 and the cup-shaped yoke 121 via the gaps 130 and 131. In order to reduce the solid friction, the outer peripheral surface of the drive coil 112 and the inner peripheral surface of the cup-shaped yoke 121 are provided with a member 151 having good lubricity or slidability, for example, a resin containing a lubricant, a resin containing calcium titanate, Teflon. (Registered trademark) resin, fluorine resin, etc. are applied and coated. Since the cup-shaped shaft 121a of the driver 155 slides, it can be seen that the solid friction is reduced as compared with Reference D.
[0023]
In FIG. 3, the vibrating body 170 of the present invention includes a cylindrical frame 111 made of synthetic resin or metal, a driving coil 112, and a driver 175, which are described in common with FIG. 1. At one end in the axial direction of the frame 111, a magnet is formed on a cylindrical coil bobbin 113 coaxially with the formed frame bearing 111a and anodized with a metal material, for example, aluminum having good heat conduction and electrically insulating the surface. The drive coil 112 formed by winding a wire is fixed in a cantilever manner. The driver 175 has a cylindrical pole piece 123 made of a magnetic material in the axial direction at the center of a cup-shaped yoke 121 made of a magnetic material. A weight 128 formed by resin-molding, for example, tungsten powder having a large mass is fixed to the inner and outer peripheral bottom surfaces of the cup-shaped yoke 121 with an adhesive or the like. . The cup-shaped yoke shaft 121a of the driver 175 is supported in a cantilever manner with respect to a frame bearing 111a of the frame 111, and is held by coil springs 124 and 125 so that the sliding surface can be smoothly driven in the axial direction. . In this case, the magnitude of the vibration amplitude of the driver 120 is configured to be within the sliding surface of the frame bearing 111a. The magnetic flux generated by the columnar permanent magnet 122a and the reinforcing magnet 122b is engaged with the drive coil 112 via the pole pieces 123 and the cup-shaped yoke 121 via the gaps 130 and 131. Solid friction is generated on the frame bearing 111a, the cup-shaped yoke shaft 121a, and the outer peripheral surface of the drive coil 112 and the inner peripheral surface of the cup-shaped yoke 121, but the stability of the axial vibration is good and the whole is compared with the references D and E. Decrease.
[0024]
In FIG. 4, the vibrating body 190 of the present invention includes a cylindrical frame 111 made of synthetic resin or metal, a driving coil 112, and a driving element 195, which are described in common with FIG. At one end in the axial direction of the frame 111, a cylindrical material whose surface is electrically insulated by anodizing a metal material, for example, aluminum having good heat conductivity, concentrically with the formed bracket bearing 181a and the frame bearing 111a. A drive coil 112 formed by winding a magnet wire around a coil bobbin 113 is fixed in a cantilever manner. The driver 195 has a cylindrical yoke shaft 182 made of a magnetic material and an annular pole piece 184 provided at the tip end thereof. A permanent magnet 185 magnetized to a single magnetic pole in a hollow cylindrical axial direction is a main yoke. It is formed to be cantilevered via 186. A weight 128 formed by resin molding of, for example, tungsten powder having a large mass is fixed to the outer peripheral bottom surface of the main yoke 186 with an adhesive or the like. The yoke shaft 182 is held by coil springs 124 and 125 so that the sliding surfaces of the bracket bearing 181a and the frame bearing 111a can be smoothly driven in the axial direction. In this case, the magnitude of the vibration amplitude of the driver 195 is set within the sliding surface of the bracket bearing 181a and the frame bearing 111a. The magnetic flux from the hollow cylindrical permanent magnet 185 engages with the drive coil 112 via the pole pieces 184 and the main yoke 186 via the gaps 130 and 131. Solid friction occurs in the yoke shaft 182, the bracket bearing 181a, and the frame bearing 111a, but can stabilize the driving and is reduced as compared with the references D and E.
[0025]
In the description of the vibrating body of the present invention, the axial cross-sectional shapes of the frame 111, the driving coil 112, the driving elements 120, 155, 175, 195, and the like are cylindrical for easy manufacture, but are not limited thereto. Any shape may be used as long as the movement of the drivers 120, 155, 175, and 195 in the axial direction is not hindered in consideration of the mounting arrangement on the portable device such as an elliptical shape or a rectangular shape.
[0026]
The driving of the drivers 120, 155, 175, 195 is performed by using an AC signal between the terminals of the driving coil 112 such as a sine wave or a square wave having the same fundamental frequency as the primary resonance frequency of the drivers 120 155, 175, 195. It is energized and driven by a bridge circuit or the like. Of course, it can be driven by a unipolar drive using a sine wave or a square wave.
[0027]
Although a pair of coil springs 124 and 125 are used for the drivers 120, 155, 175 and 195, a single coil spring may be used. In this case, the driving elements 120, 155, 175, and 195 are set to be pressed in one direction, and the driving is driven so as to overcome the static force of the coil spring. According to this method, since the drivers 120, 155, 175, and 195 are held in one direction by vibration, impact, and the like of the portable device, the vibrating body is protected from impact during transportation.
[0028]
【The invention's effect】
According to the present invention, it is possible to easily realize a vibrating body for a portable device which has a simple configuration, has low solid friction, is high in vibration generation efficiency, has excellent cost / performance, and has excellent sound sensation characteristics.
[0029]
Further, according to the present invention, since a DC motor is not used, it is not necessary to extend the life and maintain quality between brushes and commutators peculiar to the DC motor, so that manufacturing control is easy.
[0030]
Further, according to the present invention, since the resonance of the driver is used, a small-sized and high-performance vibrator having good motion conversion efficiency can be realized.
[0031]
Further, according to the present invention, it does not take much time to start up like a normal vibration motor, it is possible to play a rhythm in time with music, and the functions of a portable device can be enhanced.
[Brief description of the drawings]
FIG. 1 is a half sectional view showing a configuration of a vibrating body of the present invention.
FIG. 2 is a diagram showing another embodiment of the vibrating body of the present invention.
FIG. 3 is a diagram showing another embodiment of the vibrating body of the present invention.
FIG. 4 is a view showing another embodiment of the vibrating body of the present invention.
FIG. 5 is a conceptual diagram of Japanese Patent Application No. 2001-341285.
FIG. 6 is a conceptual diagram of Japanese Patent Application No. 2001-341285.
FIG. 7 is a conceptual diagram of Japanese Patent Application No. 2002-020793.
FIG. 8 is a conventional vibration motor.
[Explanation of symbols]
100, 150, 170, 190 Vibrator 111 Frame 111a Frame bearing 112 Drive coil 113 Coil bobbin 120, 155, 175, 195 Driver 121 Cup-shaped yoke 121a Cup-shaped yoke shaft 122a Column-shaped permanent magnet 122b Reinforced magnet 123, 184 Pole piece 124, 125 Coil spring 128 Weight 130, 131 Air gap 181a Bracket bearing 182 Yoke shaft 185 Permanent magnet 186 Main yoke

Claims (10)

A cylindrical drive coil is fixed to one end of the cylindrical frame, and a cup-shaped yoke made of a magnetic material magnetically engaged with the drive coil through a gap and a columnar permanent magnet or a cylindrical permanent magnet. A driving element formed of a columnar magnetic material and a pair of coil springs provided on both side ends of the frame are disposed so that the driving element vibrates in an axial direction. . The vibrating body driven in the axial direction includes a cup-shaped yoke made of a magnetic material, a pair of columnar permanent magnets axially magnetized at the center of the cup-shaped yoke, and a columnar pole piece made of a magnetic material. Are held coaxially and fixed to the central axis in a cantilever manner, and are supported by bearings at one end of the frame so that the central axis of the driver slides mechanically. The vibrating body driven in the axial direction according to claim 1. The vibrating body driven in the axial direction has an annular yoke at the tip end, and a cylindrical yoke made of a magnetic material is coaxially fixed at the center of a cylindrical magnet magnetized to a single magnetic pole in the axial direction. 2. The device according to claim 1, wherein the drive shaft is held in a cantilever manner on a center shaft, and is supported by bearings at both end portions of the pair of frames so that the center shaft of the drive element slides mechanically. Item 3. The vibrating body driven in the axial direction according to any one of Items 2. The vibrating body driven in the axial direction includes a cup-shaped yoke made of a magnetic material, a pair of cylindrical permanent magnets axially magnetized at the center of the cup-shaped yoke, and a columnar pole piece made of a magnetic material. And a sliding member is disposed in the gap between the inner peripheral surface of the cup-shaped yoke and the outer peripheral surface of the drive coil. An axially driven vibrating body as described. The vibrating body driven in the axial direction includes a cup-shaped yoke made of a magnetic material, a pair of columnar permanent magnets axially magnetized at the center of the cup-shaped yoke, and a columnar pole piece made of a magnetic material. Are coaxially held and fixed to the central axis in a cantilever manner, and a sliding member is disposed in a gap between the inner peripheral surface of the cup-shaped yoke and the outer peripheral surface of the drive coil, so that the center of the driver The vibrating body driven in the axial direction according to any one of claims 1 to 4, wherein the shaft is supported by a bearing at one end of the frame so as to slide mechanically. 6. The axial driving device according to claim 1, wherein a weight of the driver constituting the vibrating body driven in the axial direction is provided on the inner and outer peripheral bottom surfaces of the cup-shaped yoke. Vibrating body. 7. A driving element constituting the vibrating body driven in the axial direction, wherein a columnar pole piece made of a magnetic material is formed at the front of the columnar permanent magnet. The vibrating body driven in the axial direction according to any one of the above. 8. The vibrating body driven in the axial direction according to claim 1, wherein the drive coil of the vibrating body driven in the axial direction is wound on a cylindrical insulated metal material. 9. The vibrating body driven in the axial direction according to claim 1, wherein the driving of the vibrating body driven in the axial direction is driven by a bridge circuit. 10. The vibrating body driven in the axial direction according to claim 1, wherein the driving of the vibrating body driven in the axial direction is driven by input of a sine wave or a square wave.

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