JP2934652B2 - Optical card reciprocating conveyor - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical card reciprocating transport device for reciprocating an optical card.

[Conventional technology]

For example, while reciprocating the optical card and moving the optical head in a direction orthogonal to the reciprocating direction,
There has been proposed an information recording / reproducing system using an optical card which optically records information on an optical card and optically reads information recorded on the optical card.

In such an optical card information recording / reproducing system, the driving force of the motor is transmitted to the rollers for moving the optical card through various gears, and the rotation speed of the motor is reduced to reduce the moving speed of the optical card. An adjusted card drive is used.

[Problems to be solved by the invention]

Meanwhile, in order to increase the speed of recording and reproducing information, it is effective to increase the transport speed of the optical card. However, since tracks of an optical card are formed of discontinuous straight lines, reciprocating motion must be repeated when recording / reproducing data beyond the amount of information recordable on one track. In such a case, after recording / reproducing while transporting the optical card while maintaining a constant target speed, the speed at which the target value is reached is reduced and stopped temporarily, and then the vehicle is accelerated in the opposite direction. Control is needed. At this time, in order to increase the recording / reproducing speed, it is necessary to shorten the deceleration period until stopping as much as possible. However, if a sudden deceleration is to be performed, the shock generated at the time of stoppage is large due to the large inertia of a normal motor, and this shock causes the optical card to shake, so that the conveyance in the reverse direction is not stable. Problems arise. If stable conveyance is not possible, tracking control may be lost during recording / reproduction immediately after reversal. For this reason, there is a problem with the basic function of the recording / reproducing apparatus that reliably records and reproduces information, such as recording and destroying data on a track other than the target or reproducing data other than the target. become.

Therefore, the present invention provides a stable reversal operation even when a sudden deceleration is performed on an optical card, and enables reliable information recording / recording.
It is an object of the present invention to provide an optical card reciprocating transport device capable of reproducing.

[Means and actions for solving the problem]

The present invention relates to an optical card reciprocating transport device for reciprocating an optical card, comprising: an optical card holding unit for holding an optical card; and a driving force for reciprocating the optical card held by the optical card holding unit. An ultrasonic motor; and a driving force transmitting member for transmitting a driving force of the ultrasonic motor to the optical card via the optical card holding means, wherein the optical card holding means has one side surface of a long side of the optical card. And a first urging member that abuts against the other side of the long side of the optical card and elastically urges the other side of the long side in the direction of the one side of the long side And an upper holding portion provided on the upper surface side of the optical card, a lower holding portion provided on the lower surface side of the optical card, and a second biasing member for biasing the lower holding portion toward the upper holding portion. Hold the optical card in the surface direction A clamping member, and a support member to which the positioning member, the first biasing member, and a lower clamping portion are attached; at least the positioning member is fixed to the support member; Has a connecting portion connected to the output shaft of the ultrasonic motor, and a fixing portion fixed to the positioning member, the fixing portion is one side of the long side of the optical card across the positioning member. It is located on the side surface of the positioning member opposite to the contacting side, and furthermore, the range in which the optical card is reciprocated is the direction orthogonal to the direction in which the optical card is reciprocated and the side surface of the optical card is When viewed from a horizontal viewing direction, the output shaft of the ultrasonic motor is disposed so as to spatially overlap with the support member.

According to the present invention, the optical card holding means, the ultrasonic motor, and the driving force transmission member are provided, and the output shaft of the ultrasonic motor and the support member are arranged so as to overlap spatially. In addition to stable positioning of the optical card, the output of the ultrasonic motor can be efficiently converted to the transport force of the optical card. Further, the thickness and the length in the transport direction of the entire optical card reciprocating transport device can be reduced.

〔Example〕

FIG. 1 shows the first embodiment of the present invention and is an overall perspective view of an optical card reciprocating and conveying apparatus. Card 1 is arrow A
It is mounted on the optical card reciprocating carrier so as to move in the direction. The card 1 is a so-called optical card for optically recording and reproducing information. The mounted card 1 is pressed down by the upper roller 2 near both ends of the upper surface of the flat portion, and pressed down by the rubber roller 3 near both ends of the lower surface, while the upper roller 2 and the rubber roller 3 hold the card flat portion. The card can be moved in the direction of arrow A. The roller shaft end of the rubber roller 3 is urged by a spring 7 in a direction to clamp the flat portion of the card 1.

On the other hand, on both sides in the moving direction of the card, rollers 4 are provided so as to be movable in the direction of arrow A while holding the card 1.
The shaft of the roller 4 is urged by a spring 5 in a direction to clamp the card 1.

The card 1 is moved by transmitting rotational power to the rubber roller 3. For this purpose, an ultrasonic motor 6 is connected coaxially to a roller shaft 8 penetrating the rubber roller 3.

FIG. 2A is an enlarged sectional view showing a connection state between the rubber roller 3 and the ultrasonic motor 6. The rubber roller 3 moves integrally with the roller shaft 8 while pinching the card 1 with the upper roller 2. Both ends of the card 1 are provided so as to protrude toward the outer periphery of the roller shaft 8 on the piezoelectric element 16 side. The card 9 is positioned on the opposite side by a guide frame 10 urged in the direction of pressing the side of the card 1 by a spring 11 whose one end is held by a spring holder 12 on the opposite side.

A cylindrical piezoelectric element 16 provided in a non-contact state on the outer periphery of an extension shaft 8a connected to the roller shaft 8 of the rubber roller 3
And the rubber roller 3 by the spring 13
It is held by the push frame 14 urged in the direction.
The piezoelectric element 16 has a substantially cylindrical shape, and terminals 17 are provided at required intervals so as to straddle the cylindrical body. Its position is
Both sides position 2 where distortion of piezoelectric device 16 hardly occurs during driving 2
Place. FIG. 2B is a front view showing the positional relationship between the piezoelectric element 16 and the terminal 17. FIG. 2C is a front view showing a state in which an extended shaft 8a connected to the roller shaft 8 is rotatably supported. When the piezoelectric element 16 is driven, the rotational motion due to the distortion is transmitted to the guide 9 and the pressing frame 14, and the roller shaft 8 rotates to enable the card 1 to move.

Here, the driving principle of the ultrasonic motor having the piezo-electrons will be explained. Since a voltage is applied to each of them, distortion occurs in the cross-sectional direction. Expansion and contraction occurs in a predetermined direction depending on the direction of the electric field due to the applied voltage, causing bending resonance. Further, when the phase of the applied voltage for exciting the bending resonance is shifted by 90 °, both ends of the piezoelectric electron vibrate in a circular or elliptical manner. In this case,
When the phase of one applied voltage is changed by 180 °, the direction of the circular or elliptical vibration is reversed.

Therefore, when the rotating roller is pressed against both ends of the piezoelectric element, the rotating roller can be rotated. This ultrasonic motor has the advantages of a simple structure, small size and low cost. Further, since the rotation speed is high and the output is low, there is no need for gear adjustment. Further, there is an advantage that power is transmitted without passing through a gear and inertia is small because the weight of the rotating portion is small.

FIG. 3 is an enlarged perspective view of the ultrasonic motor 6, in which an electrode 16a is provided on the surface of the piezoelectric element 16 at a position that divides the circumference of the surface into four equal parts and is parallel to the length direction. There are four electrodes,
One terminal 17a is conductively bonded to one electrode 16a, and the other terminal 17b is conductively bonded to the other electrode. In the drawing, only one electrode 16a is shown, and the other electrode is hidden. The conductive bonding is performed by soldering a part of the electrode that protrudes in the circumferential direction of the piezoelectric electrons and a part that protrudes in the center direction of the terminal.

With such a configuration, when a voltage is applied to the piezoelectric element 16, the piezoelectric element 16 is distorted. Since the distortion is regulated by the terminal 17, the rotational movement of both ends of the piezoelectric element 16 due to the distortion is transmitted to the guide 9 and the pressing frame 14 connected to the both ends. Therefore, the roller shaft 8 which is adapted to move integrally with the guide 9
Is to be rotated. When the rotation of the piezoelectric element 16 due to the distortion is transmitted to the guide 9, the guide 9 and the roller shaft 8 are fixed and move together, but the pressing frame 14 and the roller shaft extension are fixed. Since it is not provided, it hardly contributes to rotating the roller shaft 8.

As described above, the rotation of the end portion of the piezoelectric element 16 is conducted through the portion where the ceramic forming the piezoelectric element 16 and the guide 9 are in contact with each other. Depends. However, it is difficult to process the piezoelectric element 16 into a required shape (FIG. 4A). Therefore, as shown in FIG. 4B, a contact 21 made of processed metal or hard plastic containing glass may be attached to the end of the piezoelectric element 16. Needless to say, the contact may be partially provided at a plurality of locations as long as the contact is provided at least over the contact area of the end of the piezoelectric element 16 with the guide 9. By doing so, the contact angle with the guide 9 becomes constant, and the transmission efficiency of the rotational motion can be improved.

As shown in FIG. 2B, the terminal 17 is moved to the terminal 17 so that the extension shaft 8a of the roller shaft 8 passing through the axis of the piezoelectric device 16 can move up and down with the driving of the piezoelectric device 16. An elongated hole 19 in the horizontal direction is formed at the fulcrum position, and is held by a part of the frame.

Also, as shown in FIGS. 2A and 2C, the frame 18 holding the ultrasonic motor 6 and the roller shaft 8 is provided with the ultrasonic motor 6.
Further, the roller shaft 8 and the like are formed so as to be restricted from moving in the axial direction and also from being moved in a direction perpendicular to the axial direction. On the other hand, the rubber roller 3
, An ultrasonic motor 6 and a roller shaft 8 are formed so as to be able to move up and down.

〔The invention's effect〕

According to the present invention, since the ultrasonic motor is used, when the optical card is reciprocated, a stable reversing operation is possible even if the optical card is suddenly decelerated, so that information recording and reproduction can be performed reliably. In addition, since the optical card holding member, the ultrasonic motor, and the driving force transmitting member are provided, more stable positioning of the optical card can be performed, and the output of the ultrasonic motor can be efficiently converted to the optical card conveying force. can do. In addition, since the output shaft of the ultrasonic motor and the support member of the driving force transmitting member are arranged so as to be spatially overlapped with each other, it is possible to reduce the thickness of the entire reciprocating transfer device and the length in the transfer direction. .

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of an optical card reciprocating and conveying apparatus of the present invention, and FIGS. FIG. 3 is a schematic perspective view of an ultrasonic motor, and FIGS. 4A and 4B are explanatory views showing a joined state of a piezoelectric element and a guide. 1 ... Card 3 ... Rubber roller 4 ... Roller 6 ... Ultrasonic motor 8 ... Roller shaft 16 ... Piezoelectric 17 ... Terminal

Claims (1)

(57) [Claims] 1. An optical card reciprocating transport device for reciprocating an optical card, comprising: an optical card holding means for holding the optical card; and a driving force for reciprocating the optical card held by the optical card holding means. An ultrasonic motor, and a driving force transmitting member for transmitting a driving force of the ultrasonic motor to the optical card via the optical card holding means, wherein the optical card holding means has one of long sides of the optical card. A positioning member for positioning the side surface; and a first biasing member that abuts against the other side surface of the long side of the optical card and elastically biases the other side surface of the long side toward the one side surface of the long side. Components,
An optical card by an upper holding portion provided on the upper surface side of the optical card, a lower holding portion provided on the lower surface side of the optical card, and a second biasing member for biasing the lower holding portion toward the upper holding portion. And a support member to which the positioning member, the first biasing member, and the lower holding portion are attached, and at least the positioning member is fixed to the support member. The driving force transmitting member has a connecting portion connected to the output shaft of the ultrasonic motor, and a fixing portion fixed to the positioning member, and the fixing portion has the length of the optical card sandwiching the positioning member. One side of the side is located on the side surface of the positioning member opposite to the side that is in contact, and furthermore, the range in which the optical card is reciprocated is a direction orthogonal to the direction in which the optical card is reciprocated. And of the optical card An optical card reciprocating and conveying apparatus, wherein an output shaft of the ultrasonic motor is arranged to be spatially overlapped with the support member when viewed from a direction in which a side surface is viewed horizontally.