JP2000076680A - Recording and reproducing device of optical recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recording and reproducing of optical recording medium permitting recording and reproducing with an optical pickup even if the optical recording medium is not positioned at a normal position. SOLUTION: At least either recording or reproducing of information onto/ from a recording area is carried out by transferring an optical recording medium 1 having a recording area 2 on the surface of a card-like substrate, and moving an optical pickup 20 operating at least either irradiation of the recording area with a light beam or image pickup of interference fringes via a guide means for guiding the optical pickup in the direction of transferring the optical medium. In this case, the guide means is provided with a main guide member 31 for primarily guiding a guided part formed on one side part of the optical pickup, a sub-guide member 32 for subordinately guiding the guided part formed on the other side part of the picking-up means, a displacing means 42 for displacing the primary guide member in one direction of the optical recording medium, and a position control means 50 for operating the displacing means for the optical pickup to follow up the recording area according to the output signal of the optical pickup.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical recording / reproducing apparatus for recording and / or reproducing an optical recording medium such as a prepaid card, a credit card, and a cash card.

[0002]

2. Description of the Related Art Conventional prepaid cards, credit cards, cash cards, and the like have a magnetic recording portion called a magnetic stripe as a recording medium, and have an ID (identification) for confirming the balance and the identity of the person if necessary. The number and the like are recorded, and the record such as the balance of the prepaid card is changed as the card is used. The card as such a recording medium is convenient to carry and does not involve cumbersome cash transfer.
It contributes to a so-called cashless society. For recording and reproducing information on the magnetic recording portion of these cards,
This is performed by moving a magnetic head in contact with it, as in a so-called magnetic tape recorder.

[0003]

Since the recording medium of the above-described card has a magnetic recording layer, the recorded contents can be easily read, and therefore, the card can be easily forged. And prepaid cards have been forged in large numbers and have become a social problem. To cope with such forgery, more complicated magnetic recording methods and IC cards have been proposed in place of conventional magnetic recording methods. However, the cost of these cards is high, and the fact is that they have not yet been widely used.

A device using a diffraction grating or a hologram as an optical recording is disclosed in Japanese Patent Publication No. 7-97388. However, if the card is legitimate,
Or it is useful to identify counterfeit goods, but it is not suitable for recording more complicated information, such as the amount of a prepaid card, the balance in a cash card, and the like. This required complicated equipment and was not practical.

[0005] Against this background, a low-cost optical card suitable for recording complicated information such as the amount of a prepaid card, a personal identification number or a card number in a cash card, and an optical recording medium for recording and reproducing the same. Has been proposed by the same applicant as the present application. By using these techniques, interference fringes of the hologram obtained by irradiating the recording area of the optical recording medium with a laser beam are detected, and the balance amount of the prepaid card, the password, the card number, etc. It is possible to obtain information.

In this recording / reproducing apparatus for an optical recording medium, an optical card is transported on a table by rollers.
It is positioned at a predetermined recording / reproducing position. During recording / reproducing, the optical pickup has a main guide member for guiding the guided portion formed on one side and a sub-guide for guiding the guided portion formed on the other side. The hologram is conveyed through guide means constituted by members and is configured to sequentially detect interference fringes of the hologram.

In this case, it has been found that if the card edge is minutely deformed or dust adheres to the card, the card is not positioned at a proper position and the recording area is out of the readable range of the optical pickup. As a result, the recording area of the optical recording medium is not irradiated with the laser beam, so that the interference fringes of the hologram cannot be detected, and a reading error, that is, the card cannot be recognized as a legitimate card despite being a legitimate card. Sometimes
It could be disadvantageous for the user.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a recording / reproducing apparatus for an optical recording medium which enables recording and reproduction by an optical pickup even when the optical recording medium is not positioned at a regular position. The purpose is to provide.

[0009]

The invention according to claim 1 is
An optical pickup that conveys an optical recording medium having a recording area on the surface of a card-shaped substrate to a predetermined position and performs at least one of irradiation of a light beam on the recording area and imaging of interference fringes obtained by the irradiation, In a recording / reproducing apparatus for an optical recording medium which performs at least one of recording and reproduction of information in a recording area by moving via a guiding means for guiding in a transport direction, the guiding means is formed on one side of the optical pickup. A main guide member for guiding the guided portion in a leading manner, a sub-guiding member for guiding the guided portion formed on the other side of the optical pickup in a guided manner, and a main guide member in one direction of the optical recording medium. Displacement means for displacing the
Position control means for operating a displacement means so that the optical pickup follows the recording area based on an output signal of the optical pickup.

According to a second aspect of the present invention, in the recording / reproducing apparatus for an optical recording medium according to the first aspect, the main guide member is constituted by a rod-shaped member that fits into a through hole formed in the guided portion, The member is constituted by a rod-like member inserted between a pair of projecting portions projecting so as to suppress a change in inclination of the optical pickup.

According to a third aspect of the present invention, in the recording / reproducing apparatus for an optical recording medium according to the first or second aspect, the displacement means comprises:
A first displacement means for displacing one end of the main guide member in one direction of the optical recording medium; and a second displacement means for displacing the other end of the main guide member in one direction of the optical recording medium. The control means controls the first and second displacement means individually so as to match the position and inclination of the recording area conveyed to a predetermined position.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on preferred embodiments shown in the drawings. FIG. 1 (a),
(B) is a plan view and a side view showing the configuration of an optical card as an optical recording medium to be recorded and reproduced by the recording and reproducing apparatus according to the present invention. In the figure, an optical card 1 is made of polycarbonate having a thickness of 0.6 mm, a length of 75 mm, and a width of 25 mm.
A substrate molded in mm is used as a substrate, and a large number of recording areas are simultaneously formed on the surface thereof by protrusions of 0.1 mm square and 0.25 mm spaced from each other formed on the stamper. These recording areas are arranged in seven rows in the width direction and 240 in the longitudinal direction.
I will call it. The recording area 2 has a width of 1.5 mm and a length of 59.75 mm, and is actually formed at a position deviated to one end in the width direction. It is drawn as being located at the center in the direction. On these surfaces, a protective film 3 having a thickness of about 7 μm is formed.

FIG. 2 is a perspective view showing the structure of the transport mechanism 10 of the optical card 1 shown in FIG. 1, the optical pickup 20 for recording and reproduction, and the scanning mechanism 30 thereof.
FIG. 2B is a plan view showing a state in which the optical card 1 is conveyed and a side view showing a part of the state in cross section. In each of these figures,
The direction in which the optical card 1 is inserted from an insertion slot (not shown) and conveyed to a position where recording and reproduction are performed is indicated by X, the horizontal direction perpendicular to the direction is indicated by Y, and the vertical direction is indicated by Z.

The table 11 constituting the transport mechanism 10 has a vertically long plane shape so as to transport the optical card 1, and the front end of the surface on which the optical card 1 is placed serves as a stopper 12. One side end is formed as a guide 13 by 1 to 2 mm higher. A roller 14 is provided at the base end of the table 11 so as to convey the optical card 1 sent onto the table 11 to the back in the X direction. In this case, the roller 14 stops in a state where the side end of the optical card 1 is slid on the guide 13 and the leading end of the optical card 1 is in contact with the stopper 12.

The optical pickup 20 has a center portion at the tip in the X direction cut out obliquely downward, and a laser beam irradiating device 22 is mounted on an inclined surface 21 thereof. Table 1
The bottom surface facing 1 is also a gentle slope 23, and a CCD image sensor 24 is mounted on the slope 23.
Further, the optical pickup 20 has a guided portion 25, 2, which is spaced apart in the X direction at the tip in the Y direction, that is, on one side end.
6 and a guided portion 27 at the base end in the Y direction, that is, the other side end.

The guided portions 25 and 26 are formed with through-holes having the same axis, and a rod-shaped main guide member 31 is fitted into these through-holes, and the guided portion 27 is spaced apart in the Z direction. The auxiliary guide member 3 is formed between the pair of projections.
The main guide member 31 and the sub guide member 32 are held in parallel by a pair of holding plates 33 and 34 described later. Therefore, the main guide member 31 guides the optical pickup 20 in a leading manner, and the sub guide member 32 guides the optical pickup so as to suppress the inclination of the optical pickup, that is, guides the same.

When the laser beam LB is radiated obliquely from the laser beam irradiator 22 toward the recording area 2 in a state where the optical card 1 is in contact with the stopper 12, the hologram of the recording area 2 is reflected. Interference fringe is CC
It is detected by the D image sensor 24. And the main guide member 31
By scanning the optical pickup 20 in the X direction using the sub guide member 32 as a guide, all information in the recording area 2 can be read.

As shown in FIG. 4A, when the tip of the optical card 1 comes into contact with the stopper 12 and the dust 4 is sandwiched between the side edges of the optical card 1, the recording area 2 is moved from the scanning center line CL. As shown in FIG. 4B, if there is a minute deformed portion 5 at the side end of the optical card 1 which is in contact with the guide 13, the recording area 2 also deviates obliquely from the scanning center line CL. As a result, it is not correctly positioned at a predetermined position, and the accuracy of recording and reproduction is reduced.

FIG. 5 shows a case where the recording area 2 of the optical card 1 which is not correctly positioned at a predetermined position is placed on the optical pickup 20.
FIG. 6 is a plan view for explaining the schematic configuration and operation of the operation mechanism of the first embodiment of the optical recording medium recording / reproducing apparatus according to the present invention, which performs recording and reproduction with high precision according to the present invention. It is the front view which expanded and saw when it saw in the X direction inside (-X direction). In the figure, the same elements as those in FIG. 2 or 3 are denoted by the same reference numerals, and description thereof will be omitted.

Here, the main guide member 31 is formed of a pair of holding plates 3.
3 and the holding plate 34, each end is supported so as to be movable in a direction perpendicular to the axis of the optical card 1, that is, in the width direction of the optical card 1. It is fixed to the holding plate 34. In this case, the main guide member 3
The upper ends of the holding plates 33 and 34 that movably support 1 are
The main guide member 31 is cut out so that it can be placed and slid in the width direction of the optical card 1, and a sliding surface 35 is formed here. A screw hole 36 perpendicular to the sliding surface 35 is formed at an end portion of the sliding surface 35. A screw 41 and a small gear 43 are integrally formed on the same shaft centering around a conical drive member 42 having a conical outer periphery, and the screw 41 is screwed into the screw hole 36. .

Therefore, when the small gear 43 is rotated, the conical drive member 42 moves up and down. The main guide member 31 is mounted on the sliding surface 35 on the optical card 1 side as viewed from the conical drive member 42, and between the main guide member 31 and the cutout end faces of the holding plates 33 and 34. The coil spring 44 is mounted in a compressed state. For this reason, the main guide member 31 is pressed against the outer peripheral surface of the conical drive member 42, and when the small gear 43 is rotated clockwise as viewed from above, the main guide member 31 is forcibly moved to the optical card 1 side. Conversely, when the small gear 43 is rotated to the left, the main guide member 31 moves outward while contacting the conical drive member 42 under the action of the coil spring 44.

Further, in order to rotate the small gear 43, the large gear 45 and the small gear 46 are fixed to a rotating shaft (not shown) so that the large gear 45 and the small gear 46 rotate integrally.
7 and a small gear 48 are fixed to a rotating shaft (not shown) so as to rotate integrally.
5, the large gear 47 meshes with the small gear 46, respectively. The moving mechanism of the main guide member 31 using the gears is provided corresponding to the holding plate 33 and the holding plate 34, and the small gear 48 is connected to the output shaft of a motor (not shown) driven and controlled by the position control means 50. The gears are configured to mesh with the mechanically coupled small gears. The position control means 50 controls the main guide member 31 so that the interference fringe detected by the CCD image sensor 24 is located at a predetermined position in the Y direction, that is, is parallel to the recording area 2 and does not deviate from its reading range. In the horizontal direction. The coil spring 44, the screw 41, the conical drive member 42, the small gear 43 or the small gear 48 shown in FIG. 5 constitute the displacement means of the present invention.

FIG. 5A shows a state in which the optical card 1 has been transported to a predetermined recording / reproducing position. In this case, the main guide member 31 is held parallel to the sub guide member 32, and the optical pickup 20 is scanned for recording and reproduction along the main guide member 31. FIG. 5B shows a state in which the recording area 2 is bent rightward when viewed in the X direction because the dust 4 is sandwiched on the side of the leading end of the optical card 1.
The main guide member 31 is also bent in accordance with the bending of. That is, the main guide member 31 is held parallel to the recording area 2 and at the same distance as in the case of FIG. FIG.
(C) shows the recording area 2 by the deforming section 5 of the optical card 1.
Shows a state in which the main guide member 31 is bent to the left as viewed in the X direction.

FIG. 6A shows a state in which the main guide member 31 is pushed outward by raising the conical drive member 42 to the uppermost position, and the optical pickup 20 is accordingly displaced to the right in the drawing. ing. FIG. 6B corresponds to a case where the optical card 1 is normally conveyed to the recording / reproducing position, and shows a state in which the main guide member 31 abuts on the axially intermediate position of the conical drive member 42. FIG. 6C shows a state in which the main guide member 31 is pushed inward by lowering the conical drive member 42 to the lowermost position, and the optical pickup 20 is accordingly displaced to the left in the drawing. In either case, the outer peripheral surface of the conical drive member 42 exerts a component force such that the main guide member 31 is pressed against the sliding surface 35.
The optical pickup 20 is kept at a fixed distance from the surface of the optical card 1.

With the above configuration, according to the first embodiment shown in FIGS. 5 and 6, even when the card is not positioned at a regular position, the direction of forming the recording area 2 and the direction of scanning of the optical pickup 20 are not changed. Can be matched, thereby enabling highly accurate recording and reproduction by the optical pickup.

FIG. 7 is a plan view showing a schematic configuration of an operation mechanism of a second embodiment of the recording / reproducing apparatus for an optical recording medium according to the present invention, and FIG. 8 shows the operation mechanism in the X direction inside (-X direction). It is the front view which expanded to see. In the figure, the same elements as those in FIG. 5 or FIG. 6 are denoted by the same reference numerals, and description thereof will be omitted.
In this embodiment, a bearing hole 37 perpendicular to the sliding surface 35 is formed at an end portion of the sliding surface 35, and a shaft 52 is formed around a circular eccentric cam 51 whose outer periphery forms a cylindrical surface. Small gear 4
5 and 6 are integrally formed on the same shaft core. Among them, the point that the shaft 52 is inserted into the bearing hole 37 is different from that of FIG. In this case, the shaft 52 is fitted into the bearing hole 37 and rotates with substantially no play. The coil spring 44, the circular eccentric cam 51, and the small gear 43 shown in FIG.
The small gear 48 and the like constitute the displacement means of the present invention.

FIG. 8A shows that the main guide member 31 is moved outward by rotating the circular eccentric cam 51 to a position where the distance between the center of rotation of the circular eccentric cam 51 and the main guide member 31 is minimized. The optical pickup 20 is pushed to be displaced to the right in the drawing. FIG. 8B shows a case where the optical card 1 is normally conveyed to the recording / reproducing position.
The state in which the circular eccentric cam 51 is rotated to a position where the distance between the rotation center of the circular eccentric cam 51 and the main guide member 31 is a middle position is shown. FIG. 8C shows that the main guide member 31 is pushed inward by rotating the circular eccentric cam 51 to a position where the distance between the rotation center of the circular eccentric cam 51 and the main guide member 31 is maximized. In response, the optical pickup 20 is also displaced to the left in the drawing.

With the above-described configuration, according to the second embodiment shown in FIGS. 7 and 8, even if the card is not positioned at a regular position, the recording direction of the recording area 2 and the scanning direction of the optical pickup 20 are not changed. Can be matched, thereby enabling highly accurate recording and reproduction by the optical pickup.

FIG. 9 is a plan view showing a schematic configuration of an operation mechanism of a third embodiment of the recording / reproducing apparatus for an optical recording medium according to the present invention. In the figure, the same elements as those in FIG. And the description is omitted. In this embodiment, the angle of the main guide member 31 in the horizontal direction is adjusted by a single electric motor using a well-known torque transmission mechanism called a swing gear. Here, the oscillating gear 60 is held at a fixed center distance by a small gear 61 and a large gear 62 and an arm 63 whose rotation axes are fixed and mesh with each other.
2 and a large gear 64 that meshes in a planetary manner. Large gears 65 and 67 are rotatably supported on both sides of the oscillating gear 60 viewed in the X direction, and one of the large gears 65 and the large gear 47 at the rear end of the card are a timing belt or the like. The other large gear 67 and the large gear 47 on the leading end side of the card are connected by a belt 68.

In FIG. 9, when the rotation angle of the circular eccentric cam 51 is held at the intermediate position, recording and reproduction of the recording area 2 of the optical card 1 correctly positioned at a predetermined position are performed. FIG. 9A shows a case where the front end of the optical card 1 is at a substantially regular position, and the rear end is shifted downward in the drawing due to the presence of the deformed portion 5. At this time, when the small gear 61 of the oscillating gear 60 is rotated in the direction indicated by the arrow A, the large gear 62 is rotated in the direction indicated by the arrow B, and the large gear 64 is swung to the left side in the drawing to mesh with the large gear 65. . As a result, the circular eccentric cam 51 at the rear end of the card rotates in the direction of the arrow C, and the main guide member 31 is displaced inward in the Y direction (−Y direction).
Can be matched with the horizontal angle. FIG.
(B) shows a case where the front end of the optical card 1 is shifted downward in the drawing due to the dust 4 being sandwiched, and the rear end of the optical card 1 is at a substantially regular position. At this time, when the small gear 61 of the oscillating gear 60 is rotated in the direction indicated by the arrow D, the large gear 62 is rotated in the direction indicated by the arrow E and the large gear 6 is rotated.
4 is swung to the left side of the drawing and meshes with the large gear 67. As a result, the circular eccentric cam 51 at the leading end of the card rotates in the direction of arrow F, and the main guide member 31 moves inward in the Y direction (−Y direction).
Thus, the direction in which the recording area 2 is formed and the angle of the main guide member 31 in the horizontal direction can be matched.

With the above configuration, according to the third embodiment shown in FIG. 9, the horizontal angle of the main guide member 31 can be adjusted by one motor.

FIG. 10 is a plan view showing a schematic configuration of an operation mechanism of a fourth embodiment of the recording / reproducing apparatus for an optical recording medium according to the present invention. FIG. 11 shows the operation mechanism in the X direction inside (-X direction). It is the front view seen. In the figure, the same elements as those in FIG. 3 or FIG. 5 are denoted by the same reference numerals, and description thereof will be omitted. In the above-described first to third embodiments, the horizontal angle of the main guide member 31 is adjusted so that the forming direction of the recording area 2 and the scanning direction of the optical pickup 20 coincide with each other. The optical pickup 20 is moved to the recording area 2 by moving the main guide member 31 in parallel with the member 32.
Are sequentially made to coincide with the formation position. Here, ends of the holding plate 33 and the holding plate 34 in the Y direction are cut out so as to form a sliding surface 35 in a concave shape. A screw hole 39 in the Y direction is formed outside these cutouts, that is, at the end portions 38 of the holding plates 33 and 34.

A worm wheel 72 having one end formed with a screw 71 and the other end integrally formed as a rotating shaft 73 is provided corresponding to the holding plate 33 and the holding plate 34, respectively. A screw 71 formed in the screw 72 is screwed into each screw hole 39, and the rotating shaft 73 is rotatably supported by a bearing (not shown). A worm 75 is connected to one end of the transmission shaft 74, a worm 76 is connected to the other end, and a spur gear 78 is connected to the outside of the worm 76. in this case,
The rotating shaft 73 is rotatably supported so that the worm 75 engages with the worm wheel 72 on the holding plate 33 side, and the worm 76 engages with the worm wheel 72 on the holding plate 34 side.

Here, it is assumed that when the optical card 1 is transported to a position where it comes into contact with the stopper 12 of the table 11, the dust 4 is sandwiched and the leading end of the optical card 1 is shifted downward in the drawing as shown. In this state, the optical pickup 20 is
When the spur gear 78 is rotated to one side during recording and reproduction with respect to the recording area 2 by moving in the direction, the pair of worm wheels 72 rotate in the same direction, and the screws 71 are pushed into the back, respectively. The member 31 is moved closer to the auxiliary guide member 32, and the optical pickup 20 is moved inward in the Y direction. When the spur gear 78 is rotated in the other direction, the pair of worm wheels 72 rotate in the same direction, and the screws 71 are pulled out to the outside and the main guide member 3 is rotated.
1 is an optical pickup 20 which is kept away from the sub-guide member 32.
Is moved in the Y direction. Therefore, the optical card 1
Even when the recording area 2 is displaced obliquely from the predetermined scanning direction, the interference fringes can be detected by rotating the spur gear 78 while scanning the optical pickup 20 in the X direction.
It can be made to come to a predetermined position of the image sensor 24 (without departing from the reading range). Note that the coil spring 44, the worm wheel 72, the transmission shaft 74, the worm 75, the spur gear 78, and the like shown in FIG. 10 constitute the displacement means of the present invention.

FIG. 11B shows, for example, the state shown in FIG. 10, that is, when the dust 4 is caught in the position shown in the drawing, the leading end of the optical card 1 is shifted downward in the drawing, and the trailing end of the optical card 1 is substantially moved. The figure shows a case where it is at a regular position, and shows an initial position of the present displacement means. In this figure, the rotation direction G of the worm 75 and the screwing direction H of the screw 71 are illustrated for the sake of convenience in the following description, but it is not known in the initial state which of the two rotates. This is because the refuse 4 is not always in the state shown in FIG. 10 and may be in the opposite state, in which case the displacement means operates in the opposite state of this description. Because.

FIG. 11A shows a state where the recording area 2 of the optical card 1 is located at a predetermined recording / reproducing position and the optical pickup 20 is adjusted to the reference position. First, when the worm wheel 72 is pulled out to the outermost side in the Y direction,
Since the recording area 2 is slanted as shown in FIG. 10, when recording / reproducing toward the intermediate portion, the recording area 2 shown in FIG.
As shown in (b), when the worm 75 (76) is rotated in the direction of the arrow G, the worm wheel 72 and the screw 71 rotate integrally, the screw 71 is screwed in the direction of the arrow H, and the optical pickup 20 is rotated. It moves leftward in the drawing, that is, inward in the Y direction. In addition, in the recording / reproducing of the leading end of the recording area 2, as shown in FIG.
5 (76) is rotated in the direction of the arrow G, and the optical pickup 2 is rotated.
0 is further moved inward in the Y direction.

With the above-described configuration, according to this embodiment, even if the card is not positioned at a regular position,
High-precision recording and reproduction with an optical pickup become possible. Further, according to this embodiment, the effect that the optical system of the optical pickup 20 can be sequentially aligned with the recording area 2 by one motor can be obtained.

[0038]

According to the first aspect of the present invention, the main guide member for guiding the guided portion formed on one side of the optical pickup in a leading manner, and the main guide member formed on the other side of the pickup means. A sub-guiding member for guiding the guided portion in a guided manner,
Guide means comprising: displacement means for displacing the main guide member in one direction of the optical recording medium; and position control means for operating the displacement means so that the optical pickup follows the recording area based on an output signal of the optical pickup. Therefore, it is possible to provide an optical recording medium recording / reproducing apparatus which enables recording and reproduction by an optical pickup even when the optical recording medium is not positioned at a regular position.

According to the second aspect of the present invention, the main guide member is constituted by a rod-like member fitted into a through hole formed in the guided portion, and the sub-guide member is configured to suppress a change in inclination of the optical pickup. Since the optical pickup is constituted by the rod-shaped member inserted between the pair of projecting projections, there is an advantage that the optical pickup can follow the recording area with a simple configuration.

According to the third aspect of the present invention, since the displacement means controls one end and the other end of the main guide member individually in one direction of the optical recording medium, even if two electric motors are required. The effect that the configuration can be simplified is also obtained.

[Brief description of the drawings]

FIG. 1 is a plan view and a side view showing a configuration of an optical card as an optical recording medium to be recorded and reproduced by a recording and reproducing device according to the present invention.

FIG. 2 is a perspective view showing a configuration of a transport mechanism of the optical recording medium shown in FIG. 1, an optical pickup for performing recording and reproduction, and a scanning mechanism thereof.

FIG. 3 is a plan view showing a transport state of the optical recording medium shown in FIG. 1 and a side view showing a part in cross section.

FIG. 4 is a plan view for explaining a state of positioning error of the optical recording medium shown in FIG. 1;

FIG. 5 shows a first example of the optical recording medium recording / reproducing apparatus according to the present invention.
It is a top view for explaining a schematic structure of an operation mechanism of an embodiment, and its operation.

FIG. 6 is an enlarged front view showing various operation states of the embodiment shown in FIG. 5;

FIG. 7 shows a second embodiment of the recording / reproducing apparatus for an optical recording medium according to the present invention.
It is a top view which shows schematic structure of the operation mechanism of embodiment.

8 is an enlarged front view showing various operation states of the embodiment shown in FIG. 7;

FIG. 9 shows a third embodiment of the recording / reproducing apparatus for an optical recording medium according to the present invention.
It is a top view which shows schematic structure of the operation mechanism of embodiment.

FIG. 10 is a plan view showing a schematic configuration of an operation mechanism of an optical recording medium recording / reproducing apparatus according to a fourth embodiment of the present invention.

11 is a front view showing various operation states of the embodiment shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Optical card (optical recording medium) 2 Recording area 10 Transport mechanism 11 Table 14 Roller 20 Optical pickup 25, 26, 27 Guided part 30 Scanning mechanism 31 Main guide member 32 Secondary guide member 42 Conical drive member (displacement means) 44 Coil Spring 50 Position control means 51 Circular eccentric cam 60 Swing gear 72 Worm wheel 74 Transmission shaft 75 Worm 78 Spur gear (constitutes displacement means with coil spring, worm wheel, transmission shaft, and worm)

Claims (3)

[Claims] An optical recording medium having a recording area on a surface of a card-like substrate is conveyed to a predetermined position, and at least one of irradiation of a light beam onto the recording area and imaging of interference fringes obtained by the irradiation is performed. Pick up,
In the recording / reproducing apparatus for an optical recording medium, which moves via a guiding means for guiding the recording medium in a transport direction and performs at least one of recording and reproduction of information with respect to the recording area, the guiding means is one of the optical pickups. A main guide member for guiding the guided portion formed on the side of the optical pickup; a sub-guiding member for guiding the guided portion formed on the other side of the optical pickup in a guided manner; Displacement means for displacing the guide member in one direction of the optical recording medium, and position control means for operating the displacement means so as to cause the optical pickup to follow the recording area based on an output signal of the optical pickup. Recording / reproducing apparatus for an optical recording medium. 2. The main guide member comprises a rod-shaped member that fits into a through hole formed in the guided portion, and the sub-guide member includes a pair of protrusions that protrude so as to suppress a change in inclination of the optical pickup. 2. The recording / reproducing apparatus for an optical recording medium according to claim 1, wherein the recording / reproducing apparatus is constituted by a rod-shaped member inserted between the protrusions. 3. The displacing means comprises: first displacing means for displacing one end of the main guide member in one direction of the optical recording medium; and displacing the other end of the main guide member to one end of the optical recording medium. Second displacement means for displacing the recording area in the direction, wherein the position control means individually controls the first and second displacement means so as to match the position and inclination of the recording area conveyed to a predetermined position. 3. The recording / reproducing apparatus for an optical recording medium according to claim 1, wherein: