JPH056640A - Optical card and information recording and reproducing apparatus thereof - Google Patents

Abstract

PURPOSE:To align the position of rotating center of an optical card and the position of the center of the table rotating shaft of a turntable highly accurately. CONSTITUTION:The rotating center of a card (rotating center hole 20) which is arranged at the central part of an information recording region 19 of an optical card 18 is provided at the eccentric position at one side of the card 18. An arc-shaped part 21 whose center is the rotating center of the card is provided at one-side end of the card 18. The optical card 18 is coupled into an optical-card coupling part provided on the upper surface of the turntable of an optical-card information recording and reproducing apparatus. The optical card 18 is pushed by a clamping mechanism so that the arc-shaped part 21 of the optical card 18 comes into contact with the arc-shaped part of the optical- card coupling part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary recording / reproducing optical card having concentric or spiral information recording tracks, and an information recording / reproducing apparatus therefor.

[0002]

2. Description of the Related Art FIG. 5 shows a conventional rotary recording / reproducing optical card.

The conventional optical card 1 has a rectangular shape,
A circular information recording area 2 is provided in the central portion of the card. A circular rotation center hole 3 is formed in the center of the information recording area 2 and serves as a rotation center of the card.

As shown in FIG. 6, the optical card 1 includes an optical recording medium 4 and a transparent protective substrate 5 for covering the optical recording medium 4.
And a backing layer 7 adhered to the optical recording medium 4 with an adhesive 6. The optical recording medium 4 has a trapezoidal information recording track 4A. And this information recording track 4
A is formed in the information recording area 2 so as to be concentric or spiral around the rotation center hole 3. In order to record and reproduce information on the concentric or spiral information recording track 4A of the information recording area 2, the optical card 1 is rotated around the rotation center hole 3 and the information recording rotated by this is performed. Information is recorded on and reproduced from the track 4A by using an optical means (optical head).

FIG. 7 shows a conventional optical card information recording / reproducing apparatus for rotating the optical card 1 to record and reproduce information on the information recording track 4A of the information recording area 2.

The optical card information recording / reproducing apparatus 8 of the present invention has a turntable 9 for rotating the optical card 1 and an information recording track 4A in the information recording area 2 of the optical card 1 rotated by the turntable 9. Optical information means (not shown) for recording and reproducing information.

The optical card 1 is placed on the upper surface of the turntable 9 and is fixed in position by a clamp mechanism 10 provided on the turntable 9. In this case, in order to correctly record and reproduce information on the information recording track 4A of the information recording area 2, the rotation center hole 3 which is the card rotation center has the axis 1 of the table rotation shaft 11 of the turntable 9.
Must match 1A.

For this reason, the upper surface of the turntable 9 is engaged with the semicircular notches 12 and 13 formed on the two sides of the optical card 1 or circular holes (not shown) (see FIG. 5). Positioning pins 14 and 15 are provided to position the optical card 1 so that the rotation center hole 3 thereof coincides with the axis 11A of the table rotation shaft 11.

Therefore, the optical card 1 has the notches 12 and 13 respectively.
Is placed on the upper surface of the turntable 9 by engaging the positioning pins 14 and 15. After that, the optical card 1 is fixed in position by the clamp mechanism 10. The clamp mechanism 10
Clamp member 1 that presses the corner of optical card 1 in the direction of the arrow
6 and an urging spring (coil spring) 17 for urging the clamp member 16.

The optical card 1 and the optical card information recording / reproducing device 8 shown here are disclosed in, for example, Japanese Patent Laid-Open No. 63-310.
No. 84, etc.

[0011]

As described above, the conventional optical card 1 is provided with the semicircular cutouts 12 and 13 (or circular holes) for positioning with respect to the turntable 9. 1 uses a highly flexible plastic material for the transparent protective substrate 5 and the backing layer 7 in order to improve portability, it is difficult to form the notches 12 and 13 at predetermined positions with high precision. Therefore, there has been a problem that the rotation center hole 3 of the optical card 1 is displaced from the axis 11A of the table rotation shaft 11 and the position is not aligned.

The optical card 1 has the clamp mechanism 1 with the notches 12 and 13 engaged with the positioning pins 14 and 15.
Since the position is fixed at 0, there is also a problem that if the pressing force of the clamp mechanism 10 is not set delicately, the clamp mechanism 10 bends and flatness is impaired.

Therefore, the present invention has been made in view of the above circumstances, and an optical card capable of highly accurately aligning the card rotation center with the axis of the table rotation shaft,
And an information recording / reproducing apparatus thereof.

[0014]

According to the present invention, an information recording area for optically recording and reproducing information is provided on a card surface, and a card rotation center is arranged in this information recording area. The present invention relates to an optical card in which recording tracks are concentrically or spirally formed.

In order to achieve the above object, the present invention arranges the card rotation center at a position eccentric to the card one side, and at the end of the card one side, an arc-shaped portion centered on the card rotation center. It is characterized by being provided.

Further, the present invention has a turntable for rotating the optical card, and the optical card positioned on the turntable so that the center of the card rotation coincides with the axis of the table rotation axis by the clamp mechanism. The present invention relates to an optical card information recording / reproducing device which is fixed.

In order to achieve the above object, the present invention can fit the optical card on the upper surface of the turntable such that the card rotation center of the optical card coincides with the axis of the table rotation shaft. , A one-sided open type optical card fitting portion into which the optical card can be inserted from the side surface of the table is provided, and the clamp mechanism is used to fix the optical card fitted to the optical card fitting portion to the opening side end. It is characterized in that it is configured to be pressed through.

[0018]

According to the above construction, when the optical card is fitted into the optical card fitting portion of the turntable and the optical card is pressed by the clamp mechanism, the arc-shaped portion of the optical card becomes the peripheral wall surface of the optical card fitting portion. The position is fixed while it is in contact with.

As a result, the card rotation center of the optical card and the axis of the table rotation shaft can be aligned with high accuracy. Further, even when the pressing force of the clamp mechanism is large, the optical card is constrained by the peripheral wall surface of the optical card fitting portion and therefore cannot be bent. Therefore, the flatness is maintained.

[0020]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an optical card according to a first embodiment of the present invention, and FIG. 2 shows an optical card information recording / reproducing apparatus. The optical card 18 has a rotation center hole 20 which is a center of rotation of the card and which is arranged at the center of the arc-shaped information recording area 19 and is arranged at a position eccentric to one side of the card 18. And
An arcuate portion 21 centered on the card rotation center is provided at one end of the card 18. In addition, a semicircular cutout 22 is provided at the center of the other end of the card 18.

The optical card 18 can be fitted on the upper surface of the turntable 24 of the optical card information recording / reproducing apparatus 23 so that the rotation center hole 20 thereof coincides with the axis 25A of the table rotation shaft 25, and An optical card fitting portion 27 of one side open type is provided so that the optical card 18 can be inserted from the side surface 26 of the table. The optical card fitting portion 27 has the same shape as the outer shape of the optical card 18 so that the peripheral side surfaces of the optical card 18 come into contact with each other without any gap.

Therefore, the optical card fitting portion 27 has an arc-shaped portion 28 which is in contact with the arc-shaped portion 21 of the optical card 18. When the arc-shaped portion 21 of the optical card 18 contacts the arc-shaped portion 28 of the optical card fitting portion 27, the rotation center hole 20 of the optical card 18 coincides with the axis 25A of the table rotation shaft 25.

The turntable 24 is provided on its upper surface with a clamp mechanism 29 for pressing the optical card 18 fitted in the optical card fitting portion 27 with the notch 22 to fix the position.

The clamp mechanism 29 includes a turntable 24.
And a clamp lever 31 rotatably mounted around a support shaft 30 and one end 3 of the clamp lever 31.
It comprises a pressing pin 32 rotatably attached to 1A and a biasing spring (coil spring) 33 interposed between the other end 31B of the clamp lever 31 and the turntable 24.

The optical card 18 has an arc-shaped portion 2 from the portion open to the side surface 26 of the table with respect to the optical card fitting portion 27.
1 is inserted first, and the arc-shaped portion 21 is the arc-shaped portion 2
Push in until it touches 8. At this time, the clamp lever 31 is rotated to the position shown by the broken line so that the pressing pin 32 does not hinder the insertion of the optical card 18. Then, when the clamp lever 31 is returned to the position shown by the solid line when the insertion of the optical card 18 is completed, the pressing pin 32 biased by the biasing spring 33 engages with the notch 22 of the optical card 18, and The optical card 18 is fixed in position on the turntable 24 by pressing 18 in the direction of the arrow.

FIG. 3 shows an optical card according to a second embodiment of the present invention, and FIG. 4 shows an optical card information recording / reproducing apparatus.

In the present embodiment, the semicircular arc-shaped portion 21 provided at one end of the optical card 18 of the first embodiment is replaced with an arc-shaped portion 34 smaller than the semicircle, and accordingly, The case where the arc-shaped portion 28 of the optical card fitting portion 27 of the turntable 24 is also changed to the arc-shaped portion 35 smaller than a semicircle is shown.

Also in this embodiment, the arc-shaped portion 34 of the optical card 18 contacts the arc-shaped portion 35 of the optical card fitting portion 27 so that the rotation center hole 20 of the optical card 18 has the axis of the table rotation shaft 25. Matches 25A.

[0030]

As described above, in the optical card of the present invention and the information recording / reproducing apparatus thereof, the arc-shaped portion centering on the card rotation center provided on one end of the optical card is provided on the upper surface of the turntable. Since the optical card is fitted into the optical card fitting part so as to come into contact with the arc-shaped part of the optical card fitting part provided, the card rotation center of the optical card and the axis of the table rotation shaft can be accurately adjusted. Can be aligned.

[Brief description of drawings]

FIG. 1 is a plan view of an optical card according to a first embodiment of the present invention.

FIG. 2 is a plan view of the optical card information recording / reproducing apparatus according to the first embodiment of the present invention.

FIG. 3 is a plan view of an optical card according to a second embodiment of the present invention.

FIG. 4 is a plan view of an optical card information recording / reproducing apparatus according to a second embodiment of the present invention.

FIG. 5 is a plan view of a conventional optical card.

FIG. 6 is an enlarged vertical side view of a conventional optical card.

FIG. 7 is a plan view of a conventional optical card information recording / reproducing apparatus.

[Explanation of symbols]

18 optical cards 19 Information recording area 20 Rotation center hole (card rotation center) 21, 34 arc-shaped part 23 Optical card information recording / reproducing device 24 turntable 25 table rotation axis 25A Table rotation axis 26 Table side 27 Optical card fitting part 29 Clamp mechanism

Claims (2)

[Claims] 1. An information recording area for optically recording and reproducing information is provided on a card surface, a card rotation center is arranged in this information recording area, and an information recording track is concentric or spiral about the card rotation center. In the optical card formed in, the optical card rotation center is arranged at a position eccentric to the card one side, and an arc-shaped portion centering on the card rotation center is provided at one end of the card. Optical card to do. 2. A turntable for rotating an optical card is provided, and an optical card positioned on the turntable such that the card rotation center coincides with the axis of the table rotation shaft is fixed by a clamp mechanism. In the optical card information recording / reproducing device,
The optical card can be fitted so that its card rotation center coincides with the axis of the table rotation shaft, and
One side open type optical card fitting portion into which the optical card can be inserted from the side surface of the table is provided, and the clamp mechanism is provided with the optical card fitted to the optical card fitting portion via the opening side end. An optical card information recording / reproducing apparatus characterized in that the optical card information recording / reproducing apparatus is configured so as to be pressed.