JPS6055577A - Optical recording and reproducing device - Google Patents

Abstract

PURPOSE:To decrease greatly the time for recording/reproduction by irradiating a laser beam from an optical pickup to record and reproduce an information signal while revolving a card holding part where an optical information card having an arc-shaped information surface is loaded. CONSTITUTION:The optical information card 7 having an arc-shaped information surface formed in a lengthwise direction is inserted to a slot 22 with a transparent base plate surface turned down. This transparent base plate surface forms an information record and serves as a recording surface. Then the card 7 is carried inside by a feed roll 23 and a load/unload roll 24 and held by a retaining pawl 11 and a touch surface 12a to be fixed to the holding part 8 of a rotor 1. Then the rotor 1 is driven to irradiate a laser beam oscillated from a semiconductor laser incorporated to an optical pickup onto the transparent base plate surface of the card 7. Thus the information signal is recorded or reproduced.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is an optical recording and reproducing method suitable for use in recording and reproducing optical information cards capable of recording various information signals at high density on an arcuate information surface. Regarding device I#.

BACKGROUND TECHNOLOGY AND PROBLEMS> Conventionally, information cards in which various information signals are recorded on a small rectangular plastic card have been widely used. Magnetic cards that record and reproduce information on a layer are common.

However, with the magnetic card mentioned in -1-2:, magnetic f413
Due to structural limitations of the magnetic head used for recording, there is a limit to the amount of information that can be recorded on this card, that is, the absolute recording capacity, and it is difficult to cope with the demand for larger capacity S as the amount of information increases. I'm doing what I can.

Therefore, the present inventor has previously proposed an optical information card that can dramatically improve the recording capacity through high-density recording and is also easy to manufacture.

This optical information card uses an optical recording method that uses a laser beam with a single wavelength and an extremely short wavelength to record and read a predetermined information signal. The width of the recording track can be made extremely narrow, and arc-shaped grooves are formed at a pitch of about 2 μm for tracking control of this recording track, so it is possible to form two recording tracks with high density. It is possible. For this reason, it has become possible to significantly improve the absolute recording capacity of the above-mentioned information card, for example, it is possible to increase the recording capacity to about 1 million times that of a conventional magnetic card of the same standard. It has become.

By the way, in optical information cards that are designed to achieve high-density recording and are provided with an extremely large number of recording tracks, the reading speed of recorded information signals is particularly problematic. For example, if the recorded signals were read by reciprocating a reading device such as an optical pickup, as with conventional magnetic cards, it would take about 2 seconds to make the device reciprocate once, so all of the recorded signals could be read. It takes more than an hour or two to read, so it's very practical.

<Object of the Invention> Therefore, an object of the present invention is to provide an optical recording and reproducing device suitable for use in recording and reproducing the above-mentioned optical information card, and which can significantly shorten the recording and reproducing time. The purpose is to provide optical recording and reproducing devices.

<Summary of the Invention> In order to achieve two objects, the present invention has a card holder for mounting an optical information card on which an arc-shaped information surface is formed, and is rotationally driven by a drive motor. a rotating body,
It is equipped with an optical pickup that freely moves in the radial direction of this rotating body and faces the information surface of the information card, which is attached to the rotating body while rotating the rotary body. It is formed by irradiating a laser beam from a pickup and recording an information signal.

<Example> Hereinafter, specific examples of the present invention will be described with reference to the drawings.

The recording and reproducing apparatus constituting the present invention includes antimony, for example.
An optical card that records and reproduces information signals by irradiating a laser beam oscillated from a half-body laser onto an information card whose recording layer is made of an optical recording material such as a selenium-based alloy. As shown in FIGS. 1 to 3, there is a rotating body 1 in which an optical information card is installed, which rotates the Hq card, and an optical pickup 2, which has a housing built-in a semiconductor laser that oscillates a laser beam. , attached to a movable support stand 3.

The rotating body 1 is formed into a substantially rectangular plate shape, and a drive shaft 5 of a drive motor 4 is inserted and fixed in the center thereof, and is fixedly attached to the support base 3 via a bearing part 6. . The rotating body 1 is configured to be rotationally driven by the drive motor 4 like a propeller.

Furthermore, - as shown in an enlarged view in FIG. 4, a card holding section 8 for mounting and fixing an optical information card 7 is provided at one end in the longitudinal direction of the rotating body 1. As shown in FIG. This card holding part 8 has an opening window 9 that allows the information side of the information card 7 to face the back side of the rotating body 1, and a window 9 that faces oppositely to each other in the radial direction (in the direction of the arrow in the figure) at both ends of the opening window 9. a pair of guide portions 10.10 provided as a pair of guide portions 10.10, and a retaining portion bent inwardly into the opening window 9 at one end in the circumferential direction (direction of arrow B in the figure) of the opening window 9. The locking claw 11 and this locking claw 11
and a rotary clamper 12 provided at the other end in the circumferential direction of the opening window 9 so as to face each other.

The opening window 9 is formed to be slightly smaller than the outer dimensions of the information card 7, and the information card 7 is supported by the rotating body 1 at the periphery of the opening window 9. being done.

The opposing guide 10a of the guide portion 10.10
, IQa are each formed in an arc shape so as to project inwardly, and are arranged so as to smoothly guide the optical information guard 7 inserted between these guide portions 10 and 10.

Furthermore, a position detecting means 13 such as a switch or an optical sensor is provided in the middle of the locking claw 11.

The rotary clamper 12 is controlled by a plunger portion 14 attached to the back side of the rotating body 1 to rotate in the direction of arrow X so that the abutting member 12a stands up. Furthermore, the above-mentioned card 7 is placed in the above-mentioned guess 12a.
A friction member such as rubber is attached so that the holding state is stable.

The holding portion 8 is provided at such a position that the center of the arc of the information surface of the information card 7 coincides with the axis of the rotating body 1 when the information card 7 is mounted.

On the other hand, the optical pickup 2 is inserted into and attached to a guide rod 15 provided on the support base 3 that extends in the rotational radial direction of the rotor 1, and is moved along the guide rod 15 by a control motor (not shown). The rotor 1 is disposed to slide in the radial direction of the rotating body 1. The objective lens 16 of the optical pickup 20 is arranged to face upward in the axial direction of the rotary body 1 and perpendicularly face the rotary body 1, and emits light from a semiconductor laser (not shown) built in the optical pickup 2. The laser beam is irradiated perpendicularly to the information surface of the optical information card T mounted on the holder 8 through the objective lens 16.

The support W stand 3 to which the rotating body 1 and the optical pickup 2 are attached is connected to a pair of substantially protruding guide portions 17.17 provided in parallel to the main body of the apparatus through bearings 18.
The guide portions 17 and 17 are supported so as to be movable along the guide portions 17 and 17.

The support stand 3 is moved by the moving motor 2 OK via the screw 19 in a direction perpendicular to the arrangement direction of the feed rollers and detachable rollers, which will be described later. It is constructed so that it dries. Further, a position detection switch 21 is provided at the end point of the movement of the support stand 3, and when the support stand 3 hits this switch 21, the movement motor 20 is stopped and the movement of the support stand 3 is stopped. It is arranged in

Furthermore, in the recording/reproducing apparatus of this embodiment, a groove-shaped insertion opening 2 for inserting the optical information card 7 into the apparatus is provided.
2, a feeding roll 23 and a removable i-ra 24 for introducing the inserted card 7 into the card holding portion 3 of the rotating body 1.
is provided.

A connecting belt 2 is attached to the feed roller 23 and the detachable roller 24.
5 so that the rotation of the motor 26 is transmitted thereto.

A support roller 28 biased by a spring 27 is disposed opposite to the feed roller 23 . The card 7 is sandwiched between the feed roller 23 and the support roller 28 and fed.

Further, the attachment/detachment roller 24 is controlled by a plunger 29 for moving the attachment/detachment roller, and is pushed down so as to press the card 7 only when attaching/detaching the card 7, and is pushed up by a spring 30 when the rotating body 1 is rotationally driven. It has become.

Next, the operation of the above-mentioned optical recording/reproducing device will be explained.

5 to 10 are schematic diagrams illustrating the operation of the recording/reproducing apparatus.

First, as shown in FIG. 5, an optical information card γ having an arc-shaped information surface formed in the longitudinal direction is prepared so that the transparent substrate surface 7a that constitutes the information surface and is the recording surface of this card T is Insert it from the insertion port 22 so that it faces downward in the figure.

Once dried, the information card 7 is sent in the direction of arrow C in FIG. 6 by the feed roller 23 and the attachment/detachment roller 24, as shown in FIG.

As shown in FIG. 7, the information card 7 is pushed onto the upper surface of the rotating body 1 by the attaching/detachable roller 24 and guided by the guide portion 10.10. It is fed 1 until the tip 7b reaches the locking pawl 11.

Next, the tip 71) of the information card T is 1=Register city (1
(When the pawl 11 is reached, it is detected by the position detection means 13 provided in the middle of the locking pawl 11, and as shown in FIG. and plunger 14.

The rotary clamper 12 is rotated in the direction of arrow X in the figure so that the abutting member 12a stands up, and the -1- information card 7 is clamped between the IL claw 11 and the abutting surface 12a, and the rotating member 12 is It is fixed to the holding part 8 of No. 1.

Next, the 91st! As shown in η, the support base 3 is moved in a direction (Z direction in the figure) perpendicular to the arrangement direction of the rollers 23 for feeding and the rollers 24 for attaching and detaching.

In this state, the rotating body 1 is driven to rotate, and a laser beam oscillated from a semiconductor laser built in the optical pickup 2 is irradiated onto the transparent substrate surface 7a of the information card γ to record or reproduce information signals. Let's do it. At this time, the optical pickup 2 is slowly slid in the radial direction of the rotating body 1 along the guide rod 15 (10), and the objective lens 16 is controlled within a minute range by a tracking coil (not shown). Therefore, it is possible to easily perform tracking control on the arc-shaped recording track of the information card 70 in the same way as with a disc-shaped optical disc. Furthermore, since the support stand 3 is moved to a predetermined position, when the rotary body 1 is driven to rotate, the rotary body 1 is prevented from coming into contact with the feed roller 23, the support roller 28, the attachment/detachment roller 24, etc. There are many people.

When the recording or reproduction is completed, the power supply to the drive motor 4 of the rotating body 1 is first stopped, and the support base 3 is moved back to its original position, and as shown in FIG. When the rotary clamper 12 of 8 is released, the attachment/detachment roller 24 is pushed down, and the attachment/detachment roller 24 and the feed roller 23 are transmitted to send out the information card I in the direction indicated by the arrow in the figure.

As described above, in the above embodiment, the optical information card 7 having the arc-shaped information surface is held at the holding portion 8 of the rotating body 1.
The optical pickup 2, which is movable in the radial direction, is used to irradiate a laser beam while rotating and driving the rotary body 1, and record or N on the information card 7.
Since tlT raw data is used, it is possible to significantly shorten the recording and reproducing time. For example, upper iI rotation body 1
If the rotation speed is set to about 180 rpm, about 3000 recording tracks can be read in less than 2 minutes, which is sufficient for practical use.

By the way, in the above embodiment, one optical pickup 2 for recording and reproducing d' is provided, but it is also possible to provide a plurality of optical pickups 2 to further shorten the recording time. It is possible to expand the system by using some of the optical pickups 2, which are provided with several KHs, for recording only and others for reproducing.

In addition, in the 2N embodiment, the optical pickup 2
is arranged on the lower surface side of the rotating body 1, but the optical pickup 2 may be opposed to the holding part 8 from the upper surface side of the rotating body 1. In this case, the information card 27 is The insertion direction may be reversed.

Further, in the above embodiment, the rotating body 1 is formed into a substantially rectangular shape, but the rotating body 1 may have any shape, such as a disk shape.

A plurality of card holding sections 8 may be provided.

<Effects of the Invention> As is clear from the description of the embodiments described above, according to the optical recording/reproducing apparatus of the present invention, recording/reproducing on an optical information card having an arc-shaped information surface is easy. Therefore, it is possible to significantly shorten the recording and reproducing time.

[Brief explanation of the drawing]

1 to 3 show an optical recording/reproducing device to which the present invention is applied, in which FIG. 1 is a plan view thereof, FIG. 2 is a front view thereof, and FIG. 3 is a side view thereof. . FIG. 4 is a perspective view of essential parts showing the card holding section. 5 to 10 are schematic drawings showing the operation of the recording/reproducing apparatus according to the present invention, FIG. 5 is a front view showing the information card inserted state, and FIG. 6 is an information power diagram showing the information card being inserted. FIG. 9 is a plan view showing the moving state of the support base, and FIG. 10 is a front view showing the delivery form of the information card. 1...Rotating body 2...Optical pickup 4...Drive motor 7...Optical information card 8...Card holder Patent applicant Sony i-type company representative Patent attorney Miumi Koike 1) Ri゛ Sakae - Figure 1 Figure 2 Figure 3 b Figure 4 Figure 5 Figure 6 Figure 7 Figure 8

Claims (1)

[Claims] The device includes a rotating body that has a card holder for mounting an optical information card having an arc-shaped information surface and is rotationally driven by a drive motor, and an optical pickup that faces and is movable in the radial direction of the rotating body. . An optical recording and reproducing device which records and reproduces information signals by irradiating a laser beam from the optical pickup onto the information surface of the information card mounted on the rotary body while rotating the rotary body.