1. Technical Field
The present invention relates to a piezoelectric motor, a driving device, an electronic component conveying device, an electronic component inspection device, a printing device, a robot hand, and a robot.
2. Related Art
A piezoelectric motor which vibrates a vibrating body formed of a piezoelectric material to drive an object has been known. The piezoelectric motor can be of small size compared to an electromagnetic motor which rotates a rotor by means of an electromagnetic force, can obtain a large driving force, and can align the object with high resolution. For this reason, the piezoelectric motor is used as an actuator for various devices, such as a driving mechanism of a camera.
The piezoelectric motor operates under the following principle. First, a vibrating body (piezoelectric material) is formed to substantially have a rectangular parallelepiped shape, and has a convex portion in an end surface in a longitudinal direction. If a voltage with a predetermined frequency is applied to the vibrating body, vibration in which the vibrating body is stretched and vibration in which the vibrating body is bent are generated simultaneously. When this happens, the end surface of the vibrating body starts an elliptical motion to rotate in one direction. Accordingly, if the convex portion provided in the end surface is pressed against the object, the object can be moved in a given direction with a frictional force acting between the convex portion and the object.
Under this operation principle, it is necessary that the piezoelectric motor is used in a state where the convex portion provided in the end surface of the vibrating body is pressed against the object. It is also necessary to retain the vibrating body such that the vibrating body does not escape due to a reaction force received by the convex portion from the object when driving the object. Nevertheless, the vibration of the vibrating body should be permitted such that the convex portion performs an elliptical motion. Accordingly, a technique in which the vibrating body is fit in a storage case in a state where the convex portion protrudes, both sides of the vibrating body are supported from a bending direction through elastic members in the storage case, and the storage case is pressed against the object along with the vibrating body has been suggested (JP-A-11-346486).
However, the suggested technique has a problem that it is difficult to efficiently use mechanical energy generated by the vibrating body so as to drive the object. This is because both sides of the vibrating body are supported from the bending direction, such that the vibration of the vibrating body is easily transmitted to the outside through the storage case, and the vibration transmitted to the outside cannot be used for driving the object.
An advantage of some aspects of the invention is that it provides a piezoelectric motor capable of efficiently driving an object.
An aspect of the invention is directed to a piezoelectric motor which applies a voltage to a vibrating body containing a piezoelectric material to generate bending vibration, and brings a convex portion in an end portion of the vibrating body into contact with an object to move the object. The piezoelectric motor includes electrodes which are formed on both surfaces of the vibrating body facing in a direction intersecting a bending direction in which the end portion provided with the convex portion moves with bending vibration of the vibrating body, and to which the voltage is applied, electric wires which are coated with a non-conductive material, and apply the voltage to the electrodes, bond portions which electrically bond the electrodes and the electric wires, a storage case which stores the vibrating body, and support portions which are provided between the vibrating body and the storage case, and sandwich both surfaces of the vibrating body provided with the electrodes from the direction intersecting the bending direction of the vibrating body, wherein the bond portions are provided in the gap corresponding to the thickness of the support portions between the electrodes of the vibrating body and the storage case, and the height of the bond portions from the electrodes and the outer diameter of the electric wires are smaller than the thickness of the support portions.
In the piezoelectric motor according to the aspect of the invention, if the electric wires are bonded to the electrodes formed on both surfaces of the vibrating body and a voltage is applied, the vibrating body undergoes bending vibration to bring the convex portion in the end portion of the vibrating body into contact with the object, thereby driving the object. The vibrating body is stored in the storage case in a state where both sides (both surfaces on which the electrodes are provided) of the vibrating body are sandwiched with the support portions from the direction intersecting the bending direction of the vibrating body. The bond portions which bond the electrodes and the electric wires are provided in the gap corresponding to the thickness of the support portions between the electrodes of the vibrating body and the storage case, and the height of the bond portions from the electrodes and the outer diameter of the electric wires are smaller than the thickness of the support portions.
In this way, if both sides of the vibrating body are sandwiched by the support portions from the direction intersecting the bending direction instead of the bending direction of the vibrating body, since the support portions are deformed in a shearing direction when the vibrating body undergoes bending vibration, it is possible to suppress the transmission of the vibration of the vibrating body to the storage case compared to a case where the vibrating body is sandwiched from the bending direction. A reaction force received by the convex portion of the vibrating body when driving the object is received with rigidity when the support portions are deformed in the shearing direction, thereby supporting the vibrating body such that the vibrating body does not escapes due to the reaction force. As a result, it is possible to efficiently drive the object. If the same surfaces as the surfaces on which the electrodes of the vibrating body are provided are sandwiched by the support portions, the wiring to the electrodes is restricted. For this reason, in the piezoelectric motor according to the aspect of the invention, the wiring to the electrodes can be made using the gap corresponding to the thickness of the support portions between the electrodes of the vibrating body and the storage case. That is, if the height of the bond portions from the electrodes and the outer diameter of the electric wires are smaller than the thickness of the support portions, the wiring (bond portions and electric wires) to the electrodes is fit in the gap between the electrodes of the vibrating body and the storage case, thereby securing the wiring to the electrodes in a system in which both sides (both surfaces on which the electrodes are provided) of the vibrating body are sandwiched by the support portions from the direction intersecting the bending direction of the vibrating body.
In the piezoelectric motor according to the aspect of the invention, the vibrating body may be sandwiched by the support portions in some node portions from a plurality of node portions where the amplitude of the bending vibration is smaller than the end portion provided with the convex portion of the vibrating body or a plurality of antinode portions, such that the bond portions may be bonded to the electrodes in a node portion which is not sandwiched by the support portions.
In this way, if the node portions of the vibrating body are sandwiched by the support portions, the amplitude (the amount of movement of the convex portion) of the vibrating body in the bending vibration can increase without increasing the amount of deformation of the support portion in the shearing direction when the vibrating body undergoes bending vibration compared to a case where a portion (the end portion provided with the convex portion or the antinode portions) different from the node portions are sandwiched. This is advantageous when driving the object.
When wiring to the electrodes is made in the node portion which is not sandwiched by the support portion (the electric wires are bonded with the bond portions), it is possible to suppress interference of the wiring with the bending vibration of the vibrating body. Besides, since it is possible to suppress deviation of the wiring from the electrodes due to the bending vibration of the vibrating body, it is suitable for securing the wiring for stably applying a voltage to the vibrating body.
In the piezoelectric motor according to the aspect of the invention, the inner surface of the storage case facing the electrodes may be coated with a non-conductive material.
With this, even when distortion or the like occurs in the storage case, and the inner surface of the storage case comes into contact with the electrodes or the bond portions, it is possible to stably apply a voltage to the vibrating body without electric leakage.
In the piezoelectric motor according to the aspect of the invention, when each electrode has four regions, a first region and a second region which are connected together through a connection portion may be formed as a single body including the connection portion, and a third region and a fourth region arranged on different sides with respect to the connection portion may be connected by the electric wire intersecting the connection portion.
When the first region and the second region are connected through the electric wire (the connection portion is constituted by the electric wire), it is necessary that the third region and the fourth region three-dimensionally intersect the electric wire which connects the third region and the fourth region. Meanwhile, if the connection portion which connects the first region and the second region is formed as a single body with the electrodes, it is not necessary to provide two electric wires to three-dimensionally intersect each other, making it easy to fit the wiring to the electrodes in the gap corresponding to the thickness of the support portions between the electrodes of the vibrating body and the storage case. Therefore, it is suitable for securing the wiring to the electrodes in a system in which both sides (both surfaces on which the electrodes are provided) of the vibrating body are sandwiched by the support portions from the direction intersecting the bending direction of the vibrating body.
A driving device, a printing device, a robot hand, a robot, or the like may be constituted using the above-described piezoelectric motor.
The above-described piezoelectric motor can realize reduction in size and high driving precision. Therefore, if the driving device, the printing device, the robot hand, the robot, or the like is constituted using the above-described piezoelectric motor, it is possible to obtain a driving device, a printing device, a robot hand, a robot, or the like which is of small size and has high performance.
An electronic component inspection device described below may be constituted using the above-described piezoelectric motor. That is, an electronic component inspection device which mounts a held electronic component in an inspection socket, and inspects the electrical characteristics of the electronic component may be configured such that the electronic component is aligned with respect to the inspection socket using the above-described piezoelectric motor.
As described above, since the piezoelectric motor according to the aspect of the invention can be of small size and can realize high driving precision, it becomes possible to align the electronic component with high precision and to realize a small electronic component inspection device.
Alternatively, an electronic component inspection device may be implemented as the following form. That is, an electronic component inspection device which mounts a held electronic component in an inspection socket, and inspects the electrical characteristics of the electronic component may be configured to include a piezoelectric motor which aligns the electronic component with respect to the inspection socket, wherein the piezoelectric motor includes a vibrating body which is formed to contain a piezoelectric material, and if a voltage is applied, undergoes bending vibration, a convex portion which is provided in an end portion of the vibrating body, electrodes which are formed on both surfaces of the vibrating body facing in a direction intersecting a bending direction in which the end portion provided with the convex portion moves with bending vibration of the vibrating body, and to which the voltage is applied, electric wires which are coated with a non-conductive material, and apply the voltage to the electrodes, bond portions which electrically bond the electrodes and the electric wires, a storage case which stores the vibrating body, and support portions which are provided between the vibrating body and the storage case, and sandwich both surfaces of the vibrating body provided with the electrodes from the direction intersecting the bending direction of the vibrating body, the bond portions are provided in the gap corresponding to the thickness of the support portions between the electrodes of the vibrating body and the storage case, and the height of the bond portions from the electrodes and the outer diameter of the electric wires are smaller than the thickness of the support portions.
An electronic component inspection device may be implemented as the following form. That is, an electronic component inspection device may be configured to include an inspection socket in which an electronic component is mounted, and the electrical characteristics of the electronic component are inspected, a holding device which holds an electronic component, a moving device which moves the holding device in the direction of three axes in total of a first axis and a second axis perpendicular to each other and a third axis perpendicular to the first axis and the second axis, an imaging device which is provided on the first axis or the second axis when viewed from the inspection socket, and detects a position in the directions of the first axis and the second axis and an angle around the third axis for the electronic component mounted in the inspection socket as the posture of the electronic component, an upstream-side stage which conveys the electronic component from the inspection socket to a predetermined position on the first axis or the second axis connecting the imaging device, a downstream-side stage which conveys the electronic component from a predetermined position opposite to the side on which the imaging device is provided when viewed from the inspection socket, and a control device which controls the operation of the moving device, wherein the control device includes a first control unit which moves the holding device holding the electronic component conveyed by the upstream-side stage onto the imaging device, a second control unit which moves the holding device to mount the electronic component whose posture is confirmed by the imaging device in the inspection socket, and a third control unit which moves the holding device to place the electronic component whose electrical characteristics are inspected in the inspection socket from the inspection socket to the downstream-side stage, the holding device has a first piezoelectric motor which moves the electronic component in the direction of the first axis on the basis of the posture of the electronic component detected by the imaging device, a second piezoelectric motor which moves the electronic component in the direction of the second axis on the basis of the posture of the electronic component detected by the imaging device, and a third piezoelectric motor which rotates the electronic component around the third axis on the basis of the posture of the electronic component detected by the imaging device, and the first to third piezoelectric motors are the above-described piezoelectric motor.
The electronic component inspection device having this configuration can mount the electronic component in the inspection socket after the posture of the electronic component is adjusted by means of the first to third piezoelectric motors provided in the holding device. Since the above-described piezoelectric motor can be of small size and can drive the object with high precision, the piezoelectric motor is particularly excellent as the first to third piezoelectric motors provided in the holding device.
An electronic component conveying device described below may be constituted using the piezoelectric motor according to the aspect of the invention. That is, an electronic component conveying device which conveys a held electronic component may be configured such that the electronic component is aligned by means of the piezoelectric motor according to the aspect of the invention.
As described above, since the piezoelectric motor according to the aspect of the invention can realize reduction in size and high driving precision, it becomes possible to align the electronic component with high precision and to realize a small electronic component conveying device.
Alternatively, an electronic component conveying device may be implemented as the following form. That is, an electronic component conveying device which conveys a held electronic component may be configured to include a piezoelectric motor which aligns the electronic component, wherein the piezoelectric motor includes a vibrating body which is formed to contain a piezoelectric material, and if a voltage is applied, undergoes bending vibration, a convex portion which is provided in an end portion of the vibrating body, electrodes which are formed on both surfaces of the vibrating body facing in a direction intersecting a bending direction in which the end portion provided with the convex portion moves with bending vibration of the vibrating body, and to which the voltage is applied, electric wires which are coated with a non-conductive material, and apply the voltage to the electrodes, bond portions which electrically bond the electrodes and the electric wires, a storage case which stores the vibrating body, and support portions which are provided between the vibrating body and the storage case, and sandwich both surfaces of the vibrating body provided with the electrodes from the direction intersecting the bending direction of the vibrating body, the bond portions are provided in the gap corresponding to the thickness of the support portions between the electrodes of the vibrating body and the storage case, and the height of the bond portions from the electrodes and the outer diameter of the electric wires are smaller than the thickness of the support portions.
An electronic component conveying device may be implemented as the following form. That is, an electronic component conveying device may be configured to include a holding device which holds an electronic component, a moving device which moves the holding device in the directions of three axes in total of a first axis and a second axis perpendicular to each other and a third axis perpendicular to the first axis and the second axis, and a control device which controls the operation of the moving device, wherein the holding device has a first piezoelectric motor which moves the electronic component in the direction of the first axis, a second piezoelectric motor which moves the electronic component in the direction of the second axis, and a third piezoelectric motor which rotates the electronic component around the third axis, and the first to third piezoelectric motors are the above-described piezoelectric motor.
The invention will be described with reference to the accompanying drawings, wherein like numbers reference like elements.
Hereinafter, in order to clarify the content of the invention, an example will be described in the following sequence.
A. Device Configuration
B. Operation Principle of Piezoelectric Motor
C. Securing of Wiring to Front Electrode and Rear Electrode
D. Modifications
E. Application Examples
The main portion 100 and the base portion 200 respectively have a plurality of components. For example, the base portion 200 is configured such that a first sidewall block 210 and a second sidewall block 220 are fastened to both sides of an upper surface of a substrate 230 substantially having a rectangular shape by locking screws 240 (see
The first sidewall block 210 has three concave portions of a front housing 212, a central housing 214, and a rear housing 216. When attaching the first sidewall block 210 to the substrate 230, attachment is made in a state where a front-side pressure spring 212s is stored in the front housing 212, and a rear-side pressure spring 216s is stored in the rear housing 216. As a result, the main portion 100 is in a state of being pressed against the second sidewall block 220 by the front-side pressure spring 212s and the rear-side pressure spring 216s. A front roller 102r and a rear roller 106r are attached onto the lateral surface side of the main portion 100 facing the second sidewall block 220. A pressure spring 222s is provided on the lateral surface of the main portion 100. The pressure spring 222s presses the main portion 100 at a location on the rear side of the front roller 102r in the X direction.
A pressing roller 104r in the Z direction (upward in the drawing) is provided on the lateral surface of the main portion 100 opposite to the side on which the front roller 102r and the rear roller 106r are provided. In a state where the first sidewall block 210 is attached, the pressing roller 104r is stored in the central housing 214 of the first sidewall block 210. A pressing spring 232s is provided between the rear side of a portion where the pressing roller 104r of the main portion 100 is provided and the substrate 230. For this reason, the pressing roller 104r is in a state of being pressed in the Z direction (upward in the drawing) with respect to the inner surface of the central housing 214.
As described below, the vibrating body 112 vibrates when a voltage is applied. The driving convex portion 114 of this example corresponds to the “convex portion” according to the invention, and the front electrodes 116 and the rear electrode of this example correspond to the “electrodes” according to the invention.
The vibrating body 112 is stored in a vibrating body case 120 in a state where both surfaces (in
As described above, in the surface of the vibrating body 112 opposite to the side on which the four front electrodes 116 are provided, the rear electrode which substantially covers the entire surface is provided, and a ground electric wire 306 for connection to the ground is bonded to the rear electrode by the solder 302. The inter-electrode electric wires 300, the external electric wires 304, and the ground electric wires 306 of this example correspond to the “electric wires” according to the invention, and the solders 302 of this example correspond to the “bond portions” according to the invention.
First, as well known in the art, the vibrating body 112 expands if a positive voltage is applied. Accordingly, as shown in
As shown in
The resonance frequency of the stretching vibration shown in
The piezoelectric motor 10 drives the object using the elliptical motion. That is, the elliptical motion is generated in a state where the driving convex portion 114 of the vibrating body 112 is pressed against the object. In this case, the driving convex portion 114 repeats an operation to move from left to right (or from right to left) in a state of being pressed against the object when the vibrating body 112 expands, and to return the original position in a state of being away from the object when the vibrating body 112 contracts. As a result, the object is driven in one direction by a frictional force applied from the driving convex portion 114. Since the driving force applied to the object is equal to a frictional force which is generated between the object and the driving convex portion 114, the magnitude of the driving force is determined by a frictional coefficient between the driving convex portion 114 and the object and a force when the driving convex portion 114 is pressed against the object.
As will be apparent from the operation principle of the piezoelectric motor 10 described above, it is necessary that the piezoelectric motor 10 is used in a state where the driving convex portion 114 is pressed against the object. For this reason, in the piezoelectric motor 10 of this example, the main portion 100 including the driving convex portion 114 is movable with respect to the base portion 200, and the driving convex portion 114 protruding the main portion 100 is pressed against the object by the pressure spring 222s provided between the main portion 100 and the base portion 200 (see
If the object is driven, the driving convex portion 114 receives a reaction force from the object. The reaction force is transmitted to the main portion 100. As described above, while the main portion 100 should be movable with respect to the base portion 200, if the main portion 100 escapes in a direction perpendicular to the moving direction with the reaction force received during driving, a sufficient driving force cannot be transmitted to the object. If the main portion 100 escapes, the amount of movement of the driving convex portion 114 decreases, such that the amount of driving of the object becomes small. Since the amount of escape of the main portion 100 may not be constantly stable, the amount of driving of the object becomes unstable. Accordingly, as shown in
The vibrating body 112 should be stored in the vibrating body case 120 in a state where the vibration (stretching vibration and bending vibration) of the vibrating body 112 is permitted such that the driving convex portion 114 performs an elliptical motion. Accordingly, as shown in
The support members 130 are formed of a resin material, such as polyimide, and as the support members 130 increase in thickness, deformation (shear deformation) in the shearing direction easily occurs to increase the allowable amplitude (the degree of freedom of vibration) of the vibrating body 112. When this happens, the amount of movement of the driving convex portion 114 increases, the amount of driving or the driving speed of the object is improved, thereby advantageously affecting the driving of the object. Meanwhile, the support members 130 support the reaction force received by the driving convex portion 114 from the object with rigidity when being deformed in the shearing direction. If the support members 130 increase in thickness, while shear deformation easily occurs, rigidity which supports the reaction force from the object is lowered to decrease the driving of the object. In this way, it is necessary that the support members 130 have an appropriate thickness so as to have appropriate rigidity which supports the reaction force received by the driving convex portion 114 from the object while permitting the vibration of the vibrating body 112 due to shear deformation. In the piezoelectric motor of this example, the vibrating body 112 (width: 7.5 mm, length: 30.0 mm, thickness: 3.0 mm) is sandwiched by the support members 130 having a thickness of 1.0 mm from both sides.
As described above, the front electrodes 116 and the rear electrode are provided on both surfaces of the vibrating body 112 sandwiched by the support members 130 (both surfaces of the vibrating body 112 facing in the direction intersecting the bending direction), and various electric wires (the inter-electrode wires 300a and 300b, the external electric wires 304a and 304b, and the ground electric wire 306) for applying a voltage to the vibrating body 112 are bonded to the electrodes by the solders 302. However, when the same surfaces as the surfaces of the vibrating body 112 on which the front electrodes 116 and the rear electrode are provided are sandwiched by the support members 130, there is a restriction on securing the wiring to the front electrodes 116 and the rear electrode. Accordingly, in the piezoelectric motor 10 of this example, the wiring to the front electrode 116a and the rear electrode of the vibrating body 112 is secured as follows.
Similarly, the gap corresponding to the thickness of the support members 130 is formed between the bottom surface of the vibrating body case 120 and the rear electrode 115 of the vibrating body 112. As described above, in the surface opposite to the side on which the four front electrodes 116 of the vibrating body 112 are provided, the rear electrode 115 which substantially covers the entire surface is provided, and the ground electric wire 306 is bonded to the rear electrode 115 by the solder 302. Similarly to the external electric wires 304a and 304b, an electric wire having an outer diameter smaller than the thickness of the support members 130 is used for the ground electric wire 306. Since the thickness (the height from the rear electrode 115) of the solder 302 which bonds the ground electric wire 306 to the rear electrode 115 is smaller than the thickness of the support members 130, the wiring (the solders 302, the ground electric wire 306) to the rear electrode 115 can be fit in the gap corresponding to the thickness of the support members 130.
As described above, in the piezoelectric motor 10 of this example, the wiring (the solders 302, the inter-electrode electric wires 300a and 300b, the external electric wires 304a and 304b) to the front electrodes 116 and the wiring (the solder 302, the ground electric wire 306) to the rear electrode 115 can be fit in the gap corresponding to the thickness of the support members 130. Therefore, in a system in which both sides (both surfaces on which the front electrodes 116 and the rear electrode 115 are provided) of the vibrating body 112 are sandwiched by the support members 130 from the direction intersecting the bending direction of the vibrating body 112, it is possible to secure the wiring to the front electrodes 116 and the rear electrode 115.
As shown in
In the piezoelectric motor 10 of this example, portions (node portions) where the amplitude of the bending vibration is smaller than the end portion provided with the driving convex portion 114 of the vibrating body 112 are sandwiched by the support members 130, and the wiring to the respective electrodes (the front electrodes 116 and the rear electrode 115) is made in the node portion different from the node portions which are sandwiched by the support members 130. In this way, it is possible to secure more stable wiring. Hereinafter, this point will be described supportively.
The vibrating body 112 which undergoes the bending vibration in the above-described manner does not vibrates uniformly as a whole (moves in the Y direction), and as shown in
The front node portion 118a and the rear node portion 118c from among the three node portions 118 are portions in which the vibrating body 112 is sandwiched by the support members 130 (see
The center node portion 118b which is not sandwiched by the support members 130 faces the gap corresponding to the thickness of the support members 130 (see
Hereinafter, modifications of the piezoelectric motor 10 of the foregoing example will be described. In the description of the modifications, the same parts as those in the foregoing example are represented by the same reference numerals as the foregoing examples, and detailed description thereof will not be repeated.
In the vibrating body 112 of the modification, during wiring to the front electrode 116, as shown in
While in the vibrating body 112 of the above-described example, the two inter-electrode electric wires 300a and 300b three-dimensionally intersect each other in the up-down direction (Z direction) (see
The piezoelectric motor 10 of this example or the piezoelectric motor 10 of the modification can be of small size and can drive the object with high precision. Therefore, the piezoelectric motor can be suitably incorporated as a driving device of the following device.
A Y stage 632 is provided in the support 630 to be movable in a direction (Y direction) parallel to the upstream-side stage 612u and the downstream-side stage 612d of the base 610, and an arm portion 634 extends from the Y stage 632 in a direction (X direction) toward the base 610. An X stage 636 is provided on the lateral surface of the arm portion 634 to be movable in the X direction. An imaging camera 638 and a holding device 650 embedded with a Z stage movable in an up-down direction (Z direction) are provided in the X stage 636. A holding portion 652 which holds the electronic component 1 is provided at the tip of the holding device 650. A control device 618 which controls the overall operation of the electronic component inspection device 600 is provided on the front surface side of the base 610. In this example, the Y stage 632 provided in the support 630, the arm portion 634, the X stage 636, or the holding device 650 corresponds to the “electronic component conveying device” according to the invention. The X stage 636, the Y stage 632, and the Z stage embedded in the holding device 650 correspond to the “moving device” according to the invention. The control device 618 of this example corresponds to the “first control unit”, the “second control unit”, and the “third control unit” according to the invention.
The electronic component inspection device 600 having the above configuration inspects the electronic component 1 as follows. First, the electronic component 1 to be inspected is placed on the upstream-side stage 612u and moves near the inspection table 616. Next, the Y stage 632 and the X stage 636 are driven to move the holding device 650 to a position directly above the electronic component 1 placed on the upstream-side stage 612u. At this time, the position of the electronic component 1 can be confirmed using the imaging camera 638. The holding device 650 falls using the Z stage embedded in the holding device 650, if the electronic component 1 is held using the holding portion 652, the holding device 650 moves directly above the imaging device 614, and the posture of the electronic component 1 is confirmed using the imaging device 614. Subsequently, the posture of the electronic component 1 is adjusted using a fine adjustment mechanism embedded in the holding device 650. The holding device 650 moves to above the inspection table 616, and then the Z stage embedded in the holding device 650 is driven to set the electronic component 1 on the inspection table 616. Since the posture of the electronic component 1 is adjusted using the fine adjustment mechanism in the holding device 650, it is possible to set the electronic component 1 at a correct position of the inspection table 616. After the electrical characteristics of the electronic component 1 are inspected using the inspection table 616, the electronic component 1 is picked up from the inspection table 616, the Y stage 632 and the X stage 636 are driven to move the holding device 650 to above the downstream-side stage 612d, and the electronic component 1 is placed on the downstream-side stage 612d. Thereafter, the downstream-side stage 612d is driven to convey the inspected electronic component 1 to a predetermined position.
As indicated by hatching in
Inside the printing device 700 are provided a carriage 720 which reciprocates in a main scanning direction on the printing medium 2, and a guide rail 710 which guides the movement of the carriage 720 in the main scanning direction. The carriage 720 has an ejection head 722 which ejects ink onto the printing medium 2, a driving unit 724 which drives the carriage 720 in the main scanning direction, and the like. A plurality of ejection nozzles are provided on the bottom surface side (the side toward the printing medium 2) of the ejection head 722, such that ink can be ejected from the ejection nozzles toward the printing medium 2. Piezoelectric motors 10m and 10s are mounted in the driving unit 724. The driving convex portion (not shown) of the piezoelectric motor 10m is pressed against the guide rail 710. For this reason, if the piezoelectric motor 10m is operated, it is possible to move the carriage 720 in the main scanning direction. The driving convex portion 114 of the piezoelectric motor 10s is pressed with respect to the ejection head 722. For this reason, if the piezoelectric motor 10s is operated, the bottom surface side of the ejection head 722 can be close to the printing medium 2 or can be away from the printing medium 2. In the printing device 700 which uses so-called roll paper as the printing medium 2, a mechanism for cutting roll paper with the image printed thereon is required. In this case, if a cutter is attached to the carriage 720 and moved in the main scanning direction, it is possible to cut roll paper.
Although the piezoelectric motor according to the embodiment of the invention or various devices having the piezoelectric motor mounted therein have been described, the invention is not limited to the foregoing examples, modifications, and application examples, and may be carried out in various forms without departing from the scope of the invention.
For example, in the above-described example, the vibrating body 112 is sandwiched by the support members 130 in the front node portion 118a and the rear node portion 118c from among the three node portions 118 of the vibrating body 112, and the wiring to the front electrodes 116 and the wiring to the rear electrode 115 are made in the center node portion 118b (see
The entire disclosure of Japanese Patent Application No. 2011-266552, filed Dec. 6, 2011 is expressly incorporated by reference herein.
Number | Date | Country | Kind |
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2011-266552 | Dec 2011 | JP | national |