JP2000134960A - Vibration actuator, manufacture thereof and ticket issuing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve efficiency of assembling of a vibration motor. SOLUTION: A vibration motor comprises a vibrator 10 in which a driving force extracting part (14) is provided at the predetermined surface (11b), a relative moving member 20 which is in contact with the driving force extracting part (14) to make relative movement against the vibrator 10 with a driving force generated on the vibrator 10, a pressure adding means 41a having a pressure adding terminal 42 to be in contact with the vibrator 10 to cause the driving force extracting part (14) and relative moving member 20 to be in contact with the predetermined force by applying an adding pressure to the vibrator 10 via the pressure adding terminal 42, and a supporting means 30 for supporting the vibrator 10 to be displaced for the direction almost parallel to the direction in which at least the adding pressure is applied. In this case, the supporting means 30 includes the holding means 35a, 35b, 35c having the opposite surfaces 35a', 35b', 35c' opposing to the predetermined surface (11b).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a vibration motor that generates relative motion between a vibrator and a relative motion member by vibration.

[0002]

2. Description of the Related Art FIG. 9 is a perspective view showing an example of a conventional vibration motor. The vibration motor 100 includes a vibrator 120
The linear drive type vibration motor includes a relative motion member 123 that performs relative motion between the vibrator 120 and a support member 124 that regulates the position of the vibrator 120.
Such a vibration motor has, for example, a structure in which the vibrator is configured as described in “Piezoelectric Linear Motor for Moving Optical Pickup 222” on page 394 of the 5th Electromagnetics-related Dynamics Symposium Proceedings. Deformed shrinkage vertical L
1-bending B4 mode flat motor ". Japanese Patent Application Laid-Open No. Hei 10-210772 discloses a driving device using such a vibration motor.

In FIG. 9, a vibrator 120 has a rectangular plate-shaped elastic body 121 and is attached to one surface of the elastic body 121 so that the elastic body 121 has a primary longitudinal vibration and a fourth-order bending vibration. And an electromechanical conversion element 122 that generates harmoniously. The elastic body 121 includes an electromechanical transducer 122
Is attached to the surface opposite to the surface on which the
b, 121c are formed. Further, semicircular notches 121d and 121e for fitting a pin for supporting the vibrator 120 are provided on the entire side in the thickness direction of the elastic body 121 on the side surface 121a in the relative movement direction. The electromechanical conversion element 122 is a member that can mutually convert electric energy and mechanical displacement, and uses a piezoelectric element, an electrostrictive element, or the like. The electromechanical transducer 122 includes drive transducers 122a and 122b and monitor transducers 122p and 122 for detecting the vibration state of the vibrator 120.
p ′.

[0004] The support member 124 has engaging portions 124b and 124c arranged on the both ends of the bottom surface of the rectangular flat plate-like support member main body 124a at equal intervals to the notches 121d and 121e provided on the elastic body 121. Have. The engaging portion 124b fits into one notch 121d, and the engaging portion 124c fits into the other notch 121e. With such a configuration, the support member 124 engages with the elastic body 121 from the side on which the electromechanical transducer 122 of the elastic body 121 is provided. Accordingly, the support member 124 regulates the position of the elastic body 121 with respect to the relative movement direction of the elastic body 121 (the direction of the double arrow in the drawing) and the direction intersecting the relative movement direction (the width direction of the elastic body 121). I do.

When the vibration motor 100 is driven, a first AC voltage having a predetermined frequency is applied to the driving conversion element 122a, and the phase of the first AC voltage is applied to the driving conversion element 122b. A second AC voltage that differs by approximately 90 ° is applied. Accordingly, the first-order longitudinal vibration and the fourth-order bending vibration are generated in the elastic body 121 in harmony. The driving force extracting portions 121b and 121c are arranged in portions that are antinodes of the fourth-order bending vibration, and generate a driving force by performing an elliptical motion by the first-order longitudinal vibration and the fourth-order bending vibration.

The vibrator 120 and the relative movement member 123
It is brought into contact with a predetermined pressure by a pressing means (not shown). Therefore, when the driving force is generated, the relative motion member 123 moves when the vibrator 120 is fixed, and moves (self-runs) when the relative motion member 123 is fixed. The monitoring conversion elements 122p and 122p ′ function as electromechanical conversion elements that convert mechanical displacement into electric energy, and generate outputs (voltages) according to the state (amplitude) of vibration generated in the elastic body 121. . Although not shown, the elastic body 121 is connected to the GND potential.

[0007]

In the above-described vibration motor, when the driving surface of the vibrator and the sliding surface of the relative motion member are stained,
Desired performance may not be obtained. Therefore, when assembling the vibration motor, care must be taken so that no object touches these driving surfaces and sliding surfaces. It is also conceivable that the driving surface or the sliding surface may be damaged by dropping the vibrator or the relative motion member. For these reasons, the assembly of the vibration motor requires caution, and the efficiency of the assembly operation has not always been high.

The present invention has been made in view of the above problems, and has as its object to improve the efficiency of assembly work of a vibration actuator.

[0009]

In order to achieve the above object, according to the first aspect of the present invention, a vibrator provided with a driving force take-out portion on a predetermined surface is brought into contact with the driving force take-out portion, A relative movement member that performs relative movement between the vibrator and the vibrator by a driving force generated by the vibrator; and a pressurizing terminal that contacts the vibrator, and is applied to the vibrator via the pressurizing terminal. Pressurizing means for applying pressure to bring the driving force take-out portion and the relative motion member into contact with a predetermined pressure, and at least the vibrator, at least in a direction substantially parallel to the direction in which the pressing force acts. And a supporting means for displaceably supporting the vibration motor, wherein the supporting means includes a holding means provided with a facing surface facing the predetermined surface.

According to the invention described in claim 2, claim 1
In the vibration motor described in (1), the opposed surface is not in contact with the predetermined surface. According to a third aspect of the present invention, there is provided the method of manufacturing the vibration motor according to the first or second aspect, wherein the vibrator and the support unit are connected to each other by the predetermined surface and the opposing surface. In the state of being held in contact, the step of disposing between the relative motion member and the pressurizing terminal, and the contact between the driving force extracting portion and the relative motion member allow the predetermined surface to face the predetermined position. Making the surface non-contact state.

According to a fourth aspect of the present invention, there is provided an accommodation means for accommodating a sheet-like member, and a conveying means for contacting the sheet-like member accommodated in the accommodation means and conveying the sheet-like member, There is provided a ticket issuing device in which the transporting means has the vibration motor according to claim 1 or 2 as a driving source.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) Hereinafter, an embodiment of the present invention will be described in more detail with reference to the drawings. In the following description, an example of an ultrasonic motor using vibration in an ultrasonic region will be described as the vibration motor.

FIG. 1 is a schematic view showing a configuration of an ultrasonic motor according to an embodiment of the present invention. FIG. 1 (A) is a side view, and FIG. 1 (B) is an A of FIG. 1 (A). It is -A sectional drawing. Also,
FIG. 2 is an explanatory diagram showing a relationship between a vibrator of the ultrasonic motor in FIG. 1 and a vibration mode generated in the vibrator. FIG.
FIG. 2A is a schematic diagram showing waveforms of two types of vibration generated in the vibrator, and FIG. 2B is a schematic plan view of the vibrator. FIG. 3 is a block diagram showing a drive circuit of the ultrasonic motor of FIG. FIG. 4 is a schematic view of a state in which the vibrator is supported by the support member, as viewed from the bottom surface side of the vibrator. The ultrasonic motor according to the present embodiment includes a vibrator 10, a roller 20 as a relative movement member, a support mechanism 30, a pressing mechanism,
And a base 50.

First, the configuration of the vibrator 10 and its driving circuit will be described. The vibrator 10 has a rectangular parallelepiped elastic body 11.
A thin plate-shaped piezoelectric element 12 bonded to the first surface 11a of the elastic body 11, and driving force extraction members 14a, 14b provided on the second surface 11b opposite to the first surface 11a. 1
4c and 14d. The elastic body 11 is formed of an elastic member such as metal or plastic. On one side surface of the elastic body 11, semicircular notches 55a and 55b are formed at positions substantially at the center in the longitudinal direction (the left-right direction in FIG. 2B). Notch 55
The position where a and 55b are formed is also a position that becomes a common node of longitudinal vibration and bending vibration described later.

The piezoelectric element 12 functions as an electromechanical transducer for converting electric energy into mechanical displacement.
Piezoelectric ceramics such as barium titanate and lead zircon titanate can be used. On the upper surface of the piezoelectric element 12, electrodes 12a, 12b, 12c, 12d, 12e, 1
2f is provided. The electrodes 12a to 12d are driving electrodes for inputting an AC voltage that is a driving signal.
The electrodes 12e and 12f are detection electrodes for detecting the vibration state of the elastic body 11, and output an electric signal (voltage) according to the vibration state of the elastic body 11. The piezoelectric element 12
When the AC voltage is applied, the elastic body 11 generates a first-order longitudinal vibration and a fourth-order bending vibration. The piezoelectric element 12
Does not interfere with the driving force extraction members 14a to 14d,
It may be arranged on the same surface as the driving force extracting members 14a to 14d.

The driving force output members 14a to 14d are made of a sliding material made of plastic or the like in order to improve the sliding state with the rotor 20. These driving force extracting members 14a to 14d may be formed integrally with the elastic body 11 in a projecting shape, or may be formed so as to be flush with the second surface 11b. FIG. 2A shows the vibrator 10 (elastic body 1).
It is explanatory drawing which shows the waveform B4 of the 4th-order bending vibration which generate | occur | produced in 1), and the waveform L1 of the 1st-order longitudinal vibration. B4a, B4
b, B4c, B4d, and B4e indicate nodes of the vibration at which the amplitude of the bending vibration becomes zero, and B4f and B4g indicate antinodes of the vibration at which the amplitude becomes the maximum. As shown in FIGS. 2A and 2B, the detection electrodes 12e and 12f are
The elastic body 11 is formed in a semicircular shape near the long side of the elastic body 11 corresponding to the positions of the nodes B4b and B4d of the bending vibration generated in the above. These detection electrodes 12e and 12f are formed so as to be symmetrical about the nodes B4b and B4d, respectively. Since the detection electrodes 12e and 12f output substantially the same signal, only one of them may be used. Further, the above-mentioned driving force extracting members 14a and 14b are bonded to a position near the antinode B4f of the bending vibration. The driving force extracting members 14c and 14d are adhered near the antinode B4g of the bending vibration.

FIG. 3 is a block diagram showing a drive circuit of the ultrasonic motor according to the present embodiment. The driving circuit includes an oscillator 60, a phase shifter 61, and two amplifiers 62a and 62b.
And a control circuit 63. The oscillator 60 includes, for example, a voltage controlled oscillator (VCO), and generates an AC voltage having a frequency based on a target speed of the ultrasonic actuator. The AC voltage output from the oscillator 60 is branched into two, one of which is input to the phase shifter 61 and the other of which is input to the amplifier 62a.

The phase shifter 61 shifts the phase of the input AC voltage by a predetermined amount (π / 2 or -π / 2), and
2b. The amplifier 62a amplifies the AC voltage output from the oscillator 60 to make it a first AC voltage. The first AC voltage is branched into two, one of which is input to the electrode 12a and the other of which is input to the electrode 12c. Amplifier 62b
Amplifies the AC voltage output from the phase shifter 61 and
AC voltage. The second AC voltage is branched into two, one is input to the electrode 12b, and the other is input to the electrode 12d. As a result, as shown in FIG. 2A, the vibrator 10 has a primary longitudinal vibration (first vibration) vibrating in the relative movement direction (the left-right direction in FIG. 2) and Fourth-order bending vibration (second vibration) vibrating in the intersecting direction is generated simultaneously. These two vibrations are combined to generate an elliptical motion at the ends of the driving force output members 14a to 14d. As a result, the driving force output members 14a to 14d
The relative motion member that contacts the end of the left or right side moves to either the left or right in FIG. To reverse the moving direction, the phase shifted by the phase shifter 61 is reversed (for example, from π / 2 to −
π / 2).

The control circuit 63 receives output voltages of the electrodes 12e and 12f. This output voltage has a value proportional to the amplitude of the vibrator 10. The control circuit compares the preset reference voltage with the output voltage. And
When the outputs from the electrodes 12e and 12f are smaller, the oscillator 60 is controlled so that the frequencies of the first and second AC voltages approach the resonance frequencies of the primary longitudinal vibration and the fourth bending vibration of the vibrator. Control. On the other hand, the electrodes 12e, 12f
When the output from is higher, the oscillator 60 is controlled such that the frequencies of the first and second AC voltages are separated from the resonance frequencies of the primary longitudinal vibration and the fourth bending vibration of the vibrator. Thereby, the vibration amplitude of the vibrator 10 is maintained at a predetermined magnitude.

The relative movement member is a roller 20 in the present embodiment, and is a shaft support 20 provided on a base 50.
It is supported rotatably about a. The outer peripheral surface of the roller 20 is in pressure contact with the distal ends of the driving force extracting members 14 c and 14 d provided on the vibrator 10 by the pressure mechanism 40. As a result, when an alternating voltage is applied to the vibrator 10 and an elliptical motion occurs on the end faces of the driving force output members 14c and 14d, the roller 20 is driven to rotate in one direction about the shaft support 20a. In the present embodiment, the driving force output members 14a and 14b are not in contact with other members, and the driving force is not transmitted by the driving force output members 14a and 14b.

Next, the support mechanism 30 will be described. FIG. 5 is a schematic view showing a configuration of the support member according to the first embodiment and a part of an assembling process of the ultrasonic motor. The support mechanism 30 includes a support member 31, and the support member 31
It comprises a mounting member 33 for fixing to zero, a receiving part 34 and the like. The support member 31 is made of a resin material, and is integrally formed with a main body portion 31a, a fixing portion 31b, and a deformed portion 31c provided between the main body portion 31a and the fixing portion 31b. The main body 31a is formed in a rectangular parallelepiped shape, and a groove 31d (see FIG. 1B) having a width larger than the width of the vibrator 10 is provided over the entire main body 31a. On both side walls of the groove 31d, as shown in FIG.
Protrusions 32a and 32b are provided to fit into two notches 55a and 55b provided on the elastic body 11 of the vibrator 10. These projections 32 a and 32 b are formed along the thickness direction of the elastic body 11. Then, as shown in FIG. 4, the notch 55a and the projection 32a of the elastic body 10 and the notch 55b and the projection 32b of the elastic body 10 are fitted into the groove 31d, as shown in FIG. It is. In addition, on the bottom surface of the groove 31d, a projection 31e is provided at a position corresponding to the two node positions B4b and B4d of the fourth-order bending vibration generated in the vibrator 10.

The deforming portion 31c is formed in a thin plate shape and can be deformed by bending. As described above, the deformable portion 31c has one end connected to the main body portion 31a and the other end connected to the fixed portion 31b. The deformed portion 31c and the main body 3
The connection portion with 1a is set on one end surface of the main body portion 31a and on the bottom surface side of the groove 31d. Fixed part 31b
Is fixed to the mounting member 33 by screws or the like.
In addition, the main body 31 a and the deformed portion 3 in the support member 31.
1c and the fixing portion 31b, as shown in FIG.
The elastic body 11 is arranged along the long side direction. With such a configuration, the main body 31a of the support member 31 is slightly displaced in a substantially linear manner in the vertical direction (the thickness direction of the elastic body 11) when the deformable portion 31c is bent around the fixed portion 31b. be able to.

The vibrator 10 has a protrusion 32 in the left-right direction (long side direction of the elastic body 11) in FIG.
By a and 32b, the relative position with respect to the main body 31a is substantially fixed. Also, in the left-right direction (the short side direction of the elastic body 11) in FIG. 1B, as shown in FIG. 4, the relative position with respect to the main body 31a is substantially fixed by being sandwiched by the protrusions 32a and 32b. Is done. However, FIG.
(A), the vertical direction in FIG. 1 (B) (the thickness direction of the elastic body 11)
About the projections 32a, 32b and the notch 55a,
Although there is some resistance caused by friction with 55b,
The main body 31a and the vibrator 10 can be relatively moved.

The mounting member 33 is fixed to the end faces of three arms 50a, 50b, 50c provided on the base 50. Also, a through hole 50d for disposing a part of a pressure mechanism described later is provided. The receiving portion 34 is installed on the base 50, and receives the second surface 11 of the elastic body 11.
b. The contact position between the receiving portion 34 and the second surface 11b is set so as to substantially coincide with the node position B4a of the fourth-order bending vibration generated in the vibrator 10.

A first holding member 35a and a second holding member 35b are provided on the main body 31a of the support member 31. Further, a third holding member 35c is provided on the fixing portion 31b. The first holding member 35a includes:
As shown in FIG. 5A, the main body 31a is provided on the end face side opposite to the connecting portion with the deformed portion 31c. Then, as shown in FIG. 4, the elastic body 11 is formed in a shape that goes around from the side surface 11c side.
An opposing surface 35a 'that opposes the second surface 11b of the elastic body 11 is formed at the tip of the first holding member 35a (see FIG. 1B). The second holding member 35b
Is, as shown in FIG. 5A,
It is installed on the end face side opposite to the connecting portion with the deforming portion 31c. Then, as shown in FIG. 4, the elastic body 11 is formed in a shape that goes around from the side surface 11d side. Then, the second surface 11b of the elastic body 11
An opposing surface 35b 'opposing to is formed.
(B)). The third holding member 35 c is
4B, the elastic body 11 is formed in a shape that wraps around the end face 11e where the driving force extracting members 14c and 14d are installed, as shown in FIG. An opposing surface 35c 'opposing the second surface 11b of the elastic body 11 is formed at the distal end (see FIG. 5A). The facing surfaces 35a ', 35b', and 35c 'are set so as to face the second surface 11b of the elastic body 11 at a predetermined interval when the ultrasonic motor is assembled.

In FIG. 1A, when the roller 20 and the receiving portion 34 are not provided, there is no member for fixing the relative position between the vibrator 10 and the main body 31a in the vertical direction of the drawing. 10 tries to move to the lower side in the drawing, coming off the groove 31d of the main body 31a. However, any one of the opposing surfaces 35a ', 35b', 35c '
1 comes into contact with the second surface 11b, and the vibrator 10
Does not fall off the groove 31d of the main body 31a as it is. The holding members 35a, 35b, 35
c may be formed integrally with the support member 31 or another member may be fixed with an adhesive or the like. In addition, since each of the holding members 35a, 35b, and 35c only needs to be able to receive the vibrator 10 and prevent it from falling, the opposing surfaces 35a ', 35b', and 35c 'are not necessarily formed on the second surface of the elastic body 11. It is not necessary to be parallel to 11b.

Next, the pressure mechanism will be described. As shown in FIG. 1B, the pressing mechanism includes a first coil spring 41a, a second coil spring 41b, a third coil spring 41c, a pressing terminal 42, and a spring holding member 43.
And a spring case 44 and the like. The first coil spring 41a is arranged inside a through hole 50d provided in the base 50. A pressure terminal 42 is fitted inside one end of the first coil spring 41a.
One end of “a” is attached to a flange 42 a of the pressure terminal 42. The other end of the first coil spring 41a is
and d is in contact with the ceiling surface 43a of the spring holding member 43 fixed so as to cover d. The distal end of the pressure terminal 42 is in contact with the upper surface of the main body 31 a of the support member 31 at a position substantially corresponding to the center in the longitudinal direction of the vibrator 10. With such a configuration, the pressing force generated by the first coil spring 41a is transmitted to the support member 31 via the pressing terminal 42,
Further, the vibration is transmitted to positions B4b and B4d, which are nodes of the fourth-order bending vibration generated in the vibrator 10, via the protrusions 31e provided on the main body 31a of the support member 31.

On the other hand, the second coil spring 41b and the third coil spring 41b
The coil spring 41c is disposed in a spring case 44 provided on the base 50. The spring case 44 includes the vibrator 1
The first spring case 4 is disposed at a position substantially corresponding to the center in the longitudinal direction of the vibrator 10 and is arranged in the width direction of the vibrator 10.
4a and a second spring case 44b. The second coil spring 41b is disposed in the first spring case 44a, and one end of the spring 41b is in contact with the second surface 11b of the elastic body 11. Further, the third coil spring 41c is disposed in the second spring case 44b, and one end of the spring 41c is in contact with the second surface 11b of the elastic body 11. The first spring case 44a and the second spring case 44b receive the springs 41b and 41c, respectively, and are then covered by the conductor plate 45. The other ends of the second coil spring 41b and the third coil spring 41c are both in contact with the conductor plate 45. With such a configuration, the pressing force generated by the second coil spring 41b and the third coil spring 41c becomes a common node between the primary longitudinal vibration and the quaternary bending vibration generated in the vibrator 10.
It is transmitted to B4c.

As described above, in the present embodiment,
The support member 31 is pressed toward the vibrator 10 by the first coil spring 41a. Further, the second coil spring 41b and the third coil spring 41c are used as grounding means for the vibrator 10, and are brought into direct contact with the elastic body 11 so that the elastic body 10 and the base 50 are connected via the conductor plate 45. Electrical connection with The second coil spring 41b and the third coil spring 41c are desirably made of stainless steel or subjected to a rust-proof treatment such as nickel plating in order to prevent electrical contact failure due to corrosion.

Next, part (1) and (2) of the assembling process of the ultrasonic motor according to the present embodiment will be described. (1) The support member 31 and the mounting member 33 are fixed,
As shown in FIG. 5A, the vibrator 10 is inserted from below the support member 31 so that the groove 31d of the main body 31a is inserted.
Fit into At this time, as described above, the notch 55a and the protrusion 32a of the elastic body 10
And the protrusion 32b are fitted to each other to form the groove 31.
The vibrator 10 is arranged in d. When the vibrator 10 is fitted into the groove 31d, the groove 31d is widened by utilizing the fact that the main body 31a is made of resin, and the projections 32a, 32b and the notches 55a, 55b may be fitted together. . FIG.
(B) is a diagram showing a state where the vibrator 10 has been fitted into the support member 31. When the roller 20 and the receiving portion 34 are not provided, and only the mounting member 33 is held, the first to third holding members 35a, 35b, and 35c have respective opposing surfaces 35a ', 35c.
b ′ and 35c ′ are in contact with the second surface 11b of the elastic body 11. Therefore, the vibrator 10 is provided with the groove 31d of the main body 31a.
Is held by the support member 31 without falling off.

(2) Thereafter, the roller 20 and the receiving portion 3
The mounting member 33 is fixed to the base 50 on which the 4 is installed.
When the mounting member 33 and the base 50 are fixed, the vibrator 10
And the roller 20 comes into contact with the driving force extracting members 14c and 14d, and the portion of the elastic body 11 at the node position B4a on the second surface 11b comes into contact with the receiving portion. Thereby, the first to first
Each opposing surface 3 of the third holding members 35a, 35b, 35c
5a ', 35b', and 35c 'are separated from the second surface 11b of the elastic body 11 to be in a non-contact state. Therefore, it does not hinder the vibration generated in the vibrator 10. Thereafter, the pressure mechanism is installed. This state is shown in FIG. In FIG. 5C, the display of the base 50 is omitted.

According to the present embodiment, when assembling the ultrasonic motor, there is almost no possibility of dropping the vibrator.
The efficiency of assembly work can be improved. (Second Embodiment) FIG. 6 is a schematic diagram showing a configuration of an ultrasonic motor according to a second embodiment of the present invention. FIG. 6A is a side view of the ultrasonic motor, and FIG. 6B is a sectional view taken along line AA of FIG. 6A. FIG. 7 is a schematic diagram showing a configuration of the support member according to the second embodiment and a part of an assembling process of the ultrasonic motor. In the following description, only the portions different from those of the first embodiment will be described, and the common portions will be denoted by the same reference numerals in FIGS. 6 and 7 and the description thereof will be omitted as appropriate. This embodiment differs from the first embodiment in the mounting position of the holding member 36 and its shape.

In this embodiment, a first holding member 36a and a second holding member 36b are provided on the bottom surface 33a of the mounting member 33. These first and second holding members 36a and 36b are formed in an L-shape as shown in FIG.
It is installed so as to wrap around from the c side (see FIG. 4).
The second surface 1 of the elastic body 11 is attached to the first holding member 36a.
An opposing surface 36a 'opposing 1b is formed. Similarly, the second holding member 36a also has an opposing surface 36b 'opposing the second surface 11b of the elastic body 11.
Each of the facing surfaces 36a 'and 36b' has a dimension larger than the width in the width direction of the vibrator 10, and
Is set so that it can be held without falling. The first holding member 36a and the second holding member 36b
If the distance is too short, the vibrator 10 cannot be stably held, so that an appropriate distance is set in advance. Further, the facing surfaces 36a 'and 36b' are set so as to face the second surface 11b of the elastic body 11 at a predetermined interval when the ultrasonic motor is assembled.

In FIG. 6A, when the roller 20 and the receiving portion 34 are not provided, there is no member for fixing the relative position between the vibrator 10 and the main body 31a in the vertical direction of the drawing. 10 tries to move to the lower side in the drawing, coming off the groove 31d of the main body 31a. However, since the opposing surfaces 36a 'and 36b' are in contact with the second surface 11b of the elastic body 11, the vibrator 10 does not fall off the groove 31d of the main body 31a as it is. The holding members 36a and 36b may be formed integrally with the attachment member 33, or another member may be fixed with an adhesive or the like. Further, similarly to the first embodiment, each holding member 36 is provided.
a and 36b are not limited as long as they can receive the vibrator 10 and prevent them from falling.
6b 'need not be parallel to the second surface 11b of the elastic body 11.

Next, part (1) and (2) of the assembling process of the ultrasonic motor according to the present embodiment will be described. (1) The support member 31 and the mounting member 33 are fixed,
The vibrator 10 is connected to the first and second holding members 36a and 36b.
Of the supporting member 31 and the main body 31a of the support member 31.
Into the groove 31d. At this time, as described above, the vibrator 10 is arranged in the groove 31d by fitting the notch 55a and the protrusion 32a of the elastic body 10 and the notch 55b and the protrusion 32b, respectively. . When the vibrator 10 is fitted into the groove 31d, the groove 31d is expanded by utilizing the fact that the main body 31a is made of resin, and the respective protrusions 32a,
32b and notches 55a and 55b may be fitted together. FIG. 7B is a diagram illustrating a state where the vibrator 10 is fitted into the support member 31. When the roller 20 and the receiving portion 34 are not provided and only the mounting member 33 is held, the facing surfaces 36a 'and 36 of the first and second holding members 36a and 36b are provided.
b ′ is in contact with the second surface 11 b of the elastic body 11. Therefore, the vibrator 10 is held by the support member 31 without falling out of the groove 31d of the main body 31a.

(2) Thereafter, the roller 20 and the receiving portion 3
The mounting member 33 is fixed to the base 50 on which the 4 is installed.
When the mounting member 33 and the base 50 are fixed, the vibrator 10
And the roller 20 comes into contact with the driving force extracting members 14c and 14d, and the portion of the elastic body 11 at the node position B4a on the second surface 11b comes into contact with the receiving portion. This allows the first,
Each facing surface 36a 'of the second holding members 36a, 36b,
36b 'is separated from the second surface 11b of the elastic body 11 and is in a non-contact state. Therefore, it does not hinder the vibration generated in the vibrator 10. Thereafter, the pressure mechanism is installed. This state is shown in FIG. FIG. 7 (C)
In FIG. 5, the display of the base 50 is omitted. According to the present embodiment, as in the first embodiment, there is almost no possibility of dropping the vibrator when assembling the ultrasonic motor, and the efficiency of the assembling operation can be improved. (Third Embodiment) FIG. 8 is a schematic perspective view showing the configuration of a portion of a ticket issuing apparatus provided with an ultrasonic motor according to a first embodiment. Further, a vibrator, a supporting mechanism, and a pressing mechanism of the ultrasonic motor are not shown. In the following description, only the portions different from those of the first embodiment will be described, and the common portions will be denoted by the same reference numerals in FIG. 8 and the description thereof will be appropriately omitted.

The main body 70 of the ticket issuing apparatus is provided with a motor installation section 70a in which an ultrasonic motor as a drive source is arranged, and a card transport surface 70b on which the card A is transported. The vibrator 10 shown in FIG.
The roller 20 that is in contact with the driving force take-out member 14c (14d) and the receiving portion 34 that is in contact with the second surface 11b of the elastic body 11 are provided. A rubber 34a is disposed as an elastic member between the receiving portion 34 and the motor installation portion 70a. The roller 20 is rotatably mounted on the motor mounting section 70a, and a drive shaft 72 extends from one of the rollers 20 in the direction of the card transport surface 70b. Further, a rubber roller 71 is attached to the drive shaft 72. A groove 70b 'is formed in the card conveying surface 70b, and the drive shaft 72 and the rubber roller 71
b ′. And the rubber roller 71 is
A part thereof protrudes from the card transport surface 70b and comes into contact with the card A.

The cards A are accommodated in a state in which a plurality of cards A are stacked in an accommodating member such as a cassette (not shown). The cassette is provided with an opening at its bottom surface, and is mounted on the main body 70 such that the lowermost card A and the rubber roller 71 are in contact with each other. When the ultrasonic motor is driven and the roller 20 rotates as described in the first embodiment with the cassette mounted, the rubber roller 71 rotates via the drive shaft 72. As a result, the card A, which is in the lowermost layer of the cassette and is in contact with the rubber roller 71, is conveyed by the friction with the rubber roller 71, for example, in the direction of the arrow in FIG. In order to ensure the frictional force between the rubber roller 71 and the card A, a known pressurizing unit may be used.

According to the present embodiment, the efficiency of the assembling work of the ultrasonic motor used as the drive source of the ticket issuing device is improved, so that the efficiency of the assembling work of the entire ticket issuing device can also be improved. (Modification) In the description of each embodiment, an ultrasonic motor using vibration in the ultrasonic region is taken as an example of the vibration motor, but the present invention can be applied to a vibration motor using a vibration region other than ultrasonic waves.

Also, an example has been described in which the ultrasonic motor generates a primary longitudinal vibration (first vibration) and a fourth bending vibration (second vibration) to generate a driving force. A vibration motor that generates a driving force using another vibration may be used. Further, the number and shape of the holding members are not limited to the examples of the embodiments. When a vibrator is incorporated into a support mechanism during the manufacture of a vibration motor, the vibrator does not easily fall off from the support mechanism, and the vibration generated in the vibrator is not suppressed when the vibration motor is driven. For example, the shape and number of the holding members may be set as appropriate.

[0041]

As described above, according to the first to third aspects of the present invention, the efficiency of the assembling operation of the vibration motor can be improved as compared with the related art. Further, according to the invention described in claim 4, the efficiency of the assembling operation of the vibration motor used as the drive source of the ticket issuing device is improved, so that the efficiency of the assembling operation of the entire ticket issuing device is also improved.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a configuration of an ultrasonic motor according to a first embodiment of the present invention. FIG. 1A is a side view of the ultrasonic motor, and FIG. 1B is a cross-sectional view taken along line AA of FIG. 1A.

FIG. 2 is an explanatory diagram showing a relationship between a vibrator of the ultrasonic motor in FIG. 1 and a vibration mode generated in the vibrator.
FIG. 2A is an explanatory diagram illustrating a waveform of a vibration generated in the vibrator, and FIG. 2B is a schematic plan view of the vibrator.

FIG. 3 is a block diagram illustrating an example of a drive circuit of the ultrasonic motor in FIG. 1;

FIG. 4 is a schematic view of a state in which the vibrator is supported by a support member, as viewed from the bottom surface side of the vibrator.

FIG. 5 is a schematic view illustrating a configuration of a support member according to the first embodiment and a part of an assembling process of the ultrasonic motor.

FIG. 6 is a schematic diagram illustrating a configuration of an ultrasonic motor according to a second embodiment. FIG. 6A is a side view of the ultrasonic motor,
FIG. 6B is a sectional view taken along line AA of FIG.

FIG. 7 is a schematic view illustrating a configuration of a support member according to a second embodiment and a part of an assembling process of an ultrasonic motor.

FIG. 8 is a schematic perspective view illustrating a configuration of a main part of a ticket issuing device according to a third embodiment.

FIG. 9 is a schematic perspective view showing a configuration of a conventional vibration motor.

[Description of Signs of Main Parts] 10 Vibrator 11 Elastic Body 12 Piezoelectric Element 14 Driving Force Extraction Member 20 Roller (Relative Motion Member) 30 Support Mechanism 31 Support Member 31a Main Body 31b Fixing Part 31c Deformation Part 33 Mounting Member 34 Receiving Part 35 Holding Member 41a First Coil Spring 41b Second Coil Spring 41c Third Coil Spring 42 Pressing Terminal 50 Base

Claims (4)

[Claims] 1. A vibrator having a driving force extracting portion provided on a predetermined surface, and a relative motion between the vibrator and the vibrator by contact with the driving force extracting portion and a driving force generated by the vibrator. A relative motion member, having a pressure terminal in contact with the vibrator, and applying a pressing force to the vibrator via the pressure terminal to apply a predetermined pressure to the driving force output portion and the relative motion member; Pressurizing means for contacting the vibrator, and supporting means for supporting the vibrator so as to be displaceable at least in a direction substantially parallel to the direction in which the pressing force acts. A vibration motor comprising a holding means provided with a facing surface facing the surface. 2. The vibration motor according to claim 1, wherein the facing surface is not in contact with the predetermined surface. 3. The method of manufacturing a vibration motor according to claim 1, wherein the vibrator and the support unit are held by bringing the predetermined surface into contact with the facing surface. In the state, the step of disposing between the relative motion member and the pressurizing terminal, and the predetermined force and the opposite surface are not in contact with each other by contacting the driving force extracting portion and the relative motion member. A method of manufacturing a vibration motor. 4. A storage device for storing a sheet-shaped member, and a transporting device for transporting the sheet-shaped member by contacting the sheet-shaped member stored in the storage device, wherein the transporting device includes a driving source. Claim 1 or Claim 2
A ticket issuing device comprising the vibration motor described in (1).