KR950006909Y1 - Double side laser disk player - Google Patents

Abstract

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Description

Combined compact disc device for laser disc player for double-sided playback

1 is a side view showing the configuration of a conventional laser disk player for double-sided reproduction.

2 is a plan view showing a disk adapter which is a main configuration of a small disk combined device of the laser disk player for double-sided reproduction according to the present invention;

3A is a cross-sectional view taken along the line A-A of FIG. 2, and FIG. 3B is a cross-sectional view taken along the lines B-B and C-C of FIG.

4A is a plan view showing a state in which a small disk is coupled to a disk adapter, which is a main component of a small disk combined device of the laser disk player for double-sided reproduction according to the present invention of FIG. 4A, and FIG. 4B is a cross-sectional view of FIG.

5A to 5C show an example of a tray applied to a laser disk player for double-sided reproduction in general. FIG. 5A is a plan view, FIG. 5B is a front view, and FIG. 5C is a side view.

6 is a cross-sectional view taken along the line D-D in FIG. 5A.

* Explanation of symbols for main parts of the drawings

21 disc adapter 22 hollow

23: support rib 24: notch

25: elastic portion 26, 27: lower support protrusion

28: upper support protrusion

The present invention relates to a small disk combined device of a laser disk player (KASER DISC PLAYER) for double-sided reproduction, and in particular, a small disk having a small diameter using a separate disk adapter, which is a double-sided exclusive for large laser disks. The present invention relates to a compact disc compatible device which can be used in a laser disc player for reproduction.

A typical double-sided reproduction laser disk player includes a turn table 1 for mounting a laser disk D, a spindle motor 2 for rotating the turn table 1, and the like. Installed at regular intervals adjacent to the laser disk (D) "Information guide rail (3), the guide rail, guide shafts (4) (4 ') supported on the bottom and the upper surface of the guide rail (3), respectively, coupled to the guide rail (3) The optical pickup 5 for reading the laser disk (D) signal, the feed motor 6 is integrally configured to power the optical pickup 5, and rotated by the drive of the feed motor 6 It consists of a transfer gear (7) for transferring the optical pickup (5), the optical pickup (5) is held between the objective lens 8, the objective lens 8 and the laser disk (D) constant It consists of the actuator 9 for making it.

In such a double-sided reproduction laser disk player, the laser disk D mounted on the turntable 1 is rotated by the drive of the spindle motor 2, and at the same time, the optical pickup 5 has a guide rail ( 3) and guided by the lower guide shaft 4 while moving in the circumferential direction from the inner circumference of the laser disk (D) is to read the information contained on the lower surface of the laser disk (D).

In addition, after reading all the information on the lower surface of the laser disk (D), it is moved along the guide rail (3) in order to read the information on the other side and is moved inward while being guided by the upper guide side (4 '), The pickup 5 is moved while being guided by the guide rail 3 and the guide shaft 4 ′ from the inner circumference of the laser disk D to the outer circumferential direction, thereby reading the information recorded on the upper surface of the laser disk D.

5 and 6 show an example of a tray 11 applied to a general double-sided laser disk player, a 12 cm compact disk seating surface 12, a 20 cm laser disk seating surface 13, and The 30 cm laser disk seating surface 14 is formed to be stepped, and reference numeral 15 in the figure shows the main body of the laser disk player.

The laser disk D is mounted on the seating surfaces 12, 13 and 14 of the tray 11 as described above and loaded into the main body 15, and as shown in FIG. The laser disk (D) is seated in 1).

However, in the general double-sided laser disc player as described above, only a relatively large laser disc D having a diameter of 20 cm and 30 cm can be reproduced on both sides, and a small disc of CD, DVD, and VSD having a diameter of 12 cm is relatively small. In the case of the two-sided reproduction is not possible, only one-sided reproduction has a disadvantage, and in the case of a small disc of 8cm in diameter, there was a number of problems such as the playback operation is not possible at all.

The main object of the present invention is to provide a small disk combined device of the laser disk player for double-sided reproduction does not have the conventional problems as described above.

Another object of the present invention is to provide a small-sized disc combined device of a laser-disc player for double-sided reproduction to enable two-sided reproduction of two small-sized discs with a diameter of 8 cm and 12 cm.

In order to achieve the object of the present invention as described above, in the laser disk player for double-sided reproduction in which at least one disc is mounted on the tray 11 to reproduce both sides of the disc, the disc adapter supported on the tray is provided. Laser disc player for double-sided play, characterized in that two small discs having small diameters are formed on the hollow inner circumferential surface to form several joining support means for the data surface to face outwards. The small disc compatible device of the present invention is provided.

The coupling support means is formed in the lower portion of the hollow inner circumferential surface, a plurality of support ribs for supporting the periphery of the lower surface of the two small disks, and several elastic portions formed by cutouts between the support ribs, The lower support protrusion is formed at both sides of the lower inner peripheral surface of the elastic portion at regular intervals to support the lower periphery of the lower surface of the two small disks, and the upper support protrusion is formed on the inner peripheral surface of the elastic portion to support the upper peripheral edge of the small disk.

Hereinafter, the compact disc compatible device of the laser disk player for double-sided reproduction according to the present invention will be described according to the embodiment shown in the accompanying drawings.

FIG. 2 is a plan view showing a disc adapter which is a main component of the small disc combined device of the laser disk player for double-sided reproduction according to the present invention. FIG. 3A is a cross-sectional view taken along line AA of FIG. 2, and FIG. 3B is a line BB and CC of FIG. Fig. 4A is a plan view showing a state in which a small disc is coupled to a disc adapter, which is a main component of the small disc combined device of the laser disc player for double-sided reproduction according to the present invention, and Fig. 4B is a cross-sectional view of Fig. 4A. .

As shown in the drawing, the compact disc combined device of the laser disc player for double-sided reproduction according to the present invention is capable of double-sided reproduction by being combined with a compact disc adapter 21 of CD, DVD, and VSD having a diameter of 8 cm and 12 cm. It is configured to

In more detail, two sheets are combined with the disk adapter 21 having a diameter of 20 cm or 30 cm so that the data surface a of the small disk D 'faces outward. As shown in Fig. 1, a 20 cm laser disk seating surface 13 of a general tray 11 or a 30 cm laser disk seating surface 14 is mounted and loaded into the main body 15, and then shown in FIG. As described above, the disk adapter 21 in which two small disks D 'are coupled to the turn table 1 is seated, so that both sides of the small disk D' can be reproduced like the laser disk D. It is.

The disk adapter 21 is provided with several coupling support means for supporting the small disk (D ') on the inner peripheral surface of the hollow 22. The engaging support means is a plurality of support ribs 23 formed at an angle of, for example, 180 ° below the inner circumferential surface of the hollow 22, and elastic portions 25 formed between the support ribs 23, respectively. ) And the lower support protrusions 26 and 27 formed at predetermined intervals on both sides of the lower inner circumferential surface of the elastic portion 25 and the upper support protrusions formed on the inner circumferential surface between the lower support protrusions 26 and 27. It consists of (8).

The coupling support means is not limited to the embodiment shown in the drawings, it can be modified in various forms.

The disk adapter 21 is preferably made to have the same thickness as that of two small disks D 'of 2.4 mm, which is the thickness of a general laser disk D.

In addition, the diameter size of the disk adapter 21 is not limited, and manufactures 12cm, 20cm, and 30cm, respectively, with respect to the diameter size of the small disk (D '), according to the diameter size of the small disk (D') It can be used optionally.

Referring to the effect of the small disk combined device of the laser disk player for double-sided reproduction according to the present invention configured as described above are as follows.

First, when two small disks D 'are laminated so that the data surface a faces outwards, they are joined by the hollows 22 of the disk adapter 21, and the outer peripheral portion of the small disk D' is overlapped. Pushes the upper support protrusion 8 so that the elastic part 25 by the cutout 24 is retracted inward elastically, and the small disc D 'has several support ribs 23 and the lower support protrusions. When it is seated at (26) (27), the upper support protrusion (8) is returned to the original state by the elasticity of the elastic part (25), thereby preventing the small disc (D ') from being separated, so as to prevent the departure of the small disk (D') from FIG. As shown in the figure, two small disks D 'are coupled to the disk adapter 21. As shown in FIG.

As described above, the disk adapter 21 in which the two small disks D 'are combined is mounted on the tray 11 shown in FIGS. 5 and 6 according to the diameter size of the disk adapter 21. (13) After mounting on the 14, the normal loading and mounting operation is carried out. As shown in FIG. 1, a disk adapter in which two small disks D 'are coupled to the turntable 1 ( 21) is to be seated, and then a double-sided reproduction operation of the conventional small disk D 'is performed.

In this case, the disk presence and absence check and the disc type check are performed in the same manner as the conventional case. Since the disk adapter 21 is made of plastic, the laser beam emitted from the objective lens 8 for the presence or absence of the disc is checked. The reflectivity is not good with respect to, so that the disk is not misleading.

In more detail, when a disk is checked in a general manner, and whether a disk is checked, for example, a 20cm disk adapter 21 is combined with two 12cm or 8cm small disks D '. In this case, the small disk D 'can be discriminated.

When the PLAY command is applied in this state, the optical pickup 5 moves to the lead-in area (23 mm to 25 mm radius from the center of the disc) of the small disc D ', and the spindle The motor 2 rotates. At this time, if the acceleration time of the spindle motor 2 is checked, the small disk D 'is one or the two small disks D' coupled to the disk adapter 21. ) Can be determined. In the case of using one piece of the small disk D ', the B surface reproducing command is not possible. However, in the case of the two small disks D', the B surface reproducing command must be possible, so it is necessary to distinguish it.

In the case of a spindle servo, a gain value is divided into three types, a 30cm laser disc, a 20cm laser disc, and a 12cm small disc, and a rotation moment of inertia (moment of moment) depends on the type of disc. ) Is a big difference.

In other words, the rotational moment of inertia is 23,000 gmcm for 30cm laser discs, and 2,200 to 4700 gmcm for 20cm laser discs and 60 to 300 gmcm for 12cm small discs. It makes a lot of difference. Since the difference in moment of inertia is represented by the difference in acceleration of the spindle motor 2, the disk type can be checked by monitoring the FG output.

Therefore, assuming that the disk adapter 21 is used to stack two small disks D 'onto the tray 11 to issue a play command, the sequence can be expressed as follows.

As described above, the compact disc combined device of the laser disk player for double-sided reproduction according to the present invention can be reproduced on both sides of a relatively small compact disc with a diameter of 8 cm and 12 cm by using a conventional double-sided laser disc player. It works.

Claims (2)

In a laser disc player for double-sided reproduction in which at least one disc is mounted on the tray 11 to reproduce both sides of the disc, the diameter is formed on the inner circumferential surface of the hollow 22 of the disc adapter 21 on which the tray 11 is supported. The small two small discs D 'form several joining support means for joining the data surface a to face outward, so that the small disc D' can be reproduced on both sides. Compact disc compatible device for laser disc player for double-sided reproduction. 2. The support rib according to claim 1, wherein the coupling support means is formed under the inner circumferential surface of the hollow 22 and supports several support ribs 23 for supporting the periphery of the lower surface of the two small disks D ', and the support ribs ( 23 each of the plurality of elastic portions 25 formed by the cutouts 24 between the lower portions of the inner circumferential surface of the elastic portion 25 at regular intervals. A small disk combined device of a laser disk player for double-sided reproduction, characterized in that it comprises a lower support protrusion (26) (27) supporting the lower periphery and an upper support protrusion (28) supporting the periphery.