KR19980029987U - Disc Recognition Device of Optical Disc Changer - Google Patents

Abstract

The present invention discloses a disc recognition device of an optical disc changer.

The present invention is rotatably mounted in the center of the tray, the first, second, third recognition section of the disk is formed in the center of the first, second, third mounting groove in which the disk is mounted on the upper surface, respectively, A plurality of first, second, third start or stop holes are formed at predetermined intervals to control the rotational position on a reference circle connecting the centers of the second and third mounting grooves, and adjacent to both sides of the first, second and third mounting grooves. A swivel table in which first, second, and third location holes of different lengths are formed on the reference circle, respectively; It is mounted so as to be positioned below the reference source on the upper surface of the circuit board installed in the lower part of the swivel table, and includes an optical sensor consisting of a light emitting unit for emitting and scanning an optical signal and a light receiving unit for detecting the optical signal.

Therefore, since the presence or absence of the disk and the position control are efficiently performed by a simple configuration, the operation time of the optical disk changer is greatly shortened, the use of the product is more convenient, and the number of parts is reduced, thereby reducing the production cost of the product. In addition, since the structure of the swivel table is simply configured, the molding operation is easily performed to improve the productivity of the product.

Description

Disc Recognition Device of Optical Disc Changer

The present invention relates to an optical disc changer, and more particularly, to a disc recognizing apparatus of an optical disc changer for selectively playing or recording one of a plurality of discs.

In general, an optical disk changer is loaded by a driving mechanism of a loading mechanism, and the disk is loaded to a turntable side and clamped by an operation of a clamping unit, and a disk by driving a pick-up unit. To play or record information.

Such an optical disc changer is widely used because a lot of information is conveniently recorded or reproduced on several discs, and one of several discs is selected to play or record.

As shown in FIG. 1, the optical disk changer is installed in a front of the main chassis 10 so that a tray 11 can be slidably moved toward the inside thereof, and a center of the tray 11 is provided. A swivel table 12 on which a plurality of disks D is mounted is rotatably mounted by the drive motor 13.

In addition, a turntable 14 on which the disk D transported by the tray 11 is mounted is mounted to the rear of the main chassis 10, and the disk D seated on the upper surface of the turntable 14 is clamped. clamped by (clamp: 15).

Thus, when the disk D is seated on the turntable 14, when the turntable 14 is rotated, the pickup unit 16 is transferred in the radial direction of the disk D to reproduce or record the information of the disk D. do.

By the way, the disc recognition device of the conventional optical disc changer, as shown in Fig. 2, senses the position of the disc D mounted on the swivel table 12 for selecting and reproducing or recording one of the plurality of discs D. After the recognition by the operation of the sensor 17, the focusing of the disk D is sequentially performed by the operation of the pickup unit 16 to recognize whether the disk D is present.

That is, a number set while the disk D is mounted on the swivel table 12, for example, when a user selects one of them while three disks D are mounted, the swivel table 12 is driven. Since it is rotated by the driving of the motor 13, the position of the reflection lugs 12A protruding from the swivel table 12 by the operation of the sensor 17 is sensed.

Then, the position of the disk D selected by the reflection lugs 12A of the swivel table 12 is determined and clamped to the turntable 14, and the disc D is present by focusing the pick-up unit 16. It should be recognized.

However, such a disc recognition device of the conventional optical disc changer requires an excessive time required for the recognition of the disc D, so that the operation time of the optical disc changer is long, and there is a problem that the use of the product is cumbersome and inconvenient.

In addition, since the structure of the mold is complicated due to the formation of the reflection lugs 12A when the swivel table 12 is manufactured, there is a problem in that the molding work of the swivel table 12 is cumbersome and the productivity of the product is lowered.

On the other hand, in addition to the sensor 17 for recognizing the position of the disk (D) is installed a separate sensor for recognizing the presence or absence of the disk (D), which is a complex and cumbersome assembly process is to use two sensors In addition, there is a problem that the production cost of the product is increased due to the increase in the number of parts.

The present invention has been made to solve the above-mentioned conventional problems, the object of the present invention is to shorten the recognition time of the disk by a simple mechanical configuration to facilitate the use of the product, the number of parts is reduced An object of the present invention is to provide a disc recognition device of an optical disc changer, which reduces production cost of a product and facilitates molding to improve product productivity.

A feature of the present invention for achieving the above object is a tray that is slidably transported inwardly in front of the main chassis, a clamp for selectively clamping one of a plurality of disks to a tentable, and information on the disks. An optical disc player comprising a pickup unit for recording or reproducing a disc, wherein the discs are rotatably mounted in the center of the tray, and the first, second and third discs in the center of the first, second and third mounting grooves in which the disc is mounted on the upper surface. Recognition sections are formed so as to open, a plurality of first, second, third start or stop holes for controlling the rotation position on the reference circle connecting the center of the first, second, third mounting grooves are formed at predetermined intervals, A swivel table having first and second location holes having different lengths so as to be adjacent to both sides of the first and second mounting grooves on the reference circle; The disk of the optical disk changer is mounted on the upper surface of the circuit board which is installed below the swivel table, and includes an optical sensor comprising a light emitting unit for emitting and scanning an optical signal and a light receiving unit for detecting the optical signal. It's on the recognition device.

1 is a perspective view showing a typical optical disk changer

2 is a plan view showing a disc recognition device of a conventional optical disc changer.

3 is a plan view showing a disk recognition device of the optical disk changer according to the present invention

4 is a cross-sectional view showing a disk recognition device of the optical disk changer according to the present invention.

5 is a waveform diagram of a disk recognition device of the optical disk changer according to the present invention.

Explanation of symbols for main parts of the drawings

10; Main chassis 11; tray

14; Turntable 16; Pickup unit

20; Pickup unit 21A21C; 1, 2, 3 mounting groove

22A22C; First, second, and third recognition periods 23A23C; 1, 2, 3 start or stop hole

24A24C; First, second, and third location holes 30; Circuit board

31; Optical sensor D; disk

Hereinafter, one preferred embodiment of the disc recognition device of the optical disc changer according to the present invention will be described in detail with reference to the accompanying drawings.

3 and 4 are diagrams for explaining the disc recognition device of the optical disc changer according to the present invention, the basic configuration of the optical disc changer described in Figure 1 will be described with the same reference numerals.

1 and 3, the tray 11 is installed in the front of the main chassis 10 so as to be slide-movable toward the inside thereof, and a plurality of disks D are mounted in the center of the tray 11. The swivel table 20 is rotatably mounted by the drive of the drive motor 13.

In addition, a turntable 14 on which the disk D transported by the tray 11 is mounted is mounted to the rear of the main chassis 10, and the disk D seated on the upper surface of the turntable 14 is clamped 15. Clamped by).

Meanwhile, the first, second and third mounting grooves 21A21C are formed at equal intervals so that the disk D is mounted on the upper surface of the swivel table 20, and the center of the first, second and third mounting grooves 21A21C is provided. The first, second, and third recognition sections 22A22C of the disk D are open, that is, formed into open spaces.

Here, the first, second, and third mounting grooves 21A21C are formed in a substantially circular shape, and the center thereof is formed to coincide with the center hole (Dh) of the disc D, and the first, second, and third recognition sections are provided. The width of the 22A22C is formed larger than the diameter of the center hole Dh of the disk D. Hereinafter, the disks D mounted in the first, second and third mounting grooves 21A21C will be referred to as the first and second disks D1, D2, and D3, respectively.

The swivel table 20 includes a plurality of first swivel tables 20 for controlling the rotation position of the swivel table 20 on a standard circle Sc connecting the centers of the first, second and third mounting grooves 21A21C. 2,3 start or stop holes 23A23C are formed at predetermined intervals.

Start or stop pulses are detected by the first, second and third start or stop holes 23A23C of the swivel table 20 to control the driving of the drive motor 13.

At this time, the first, second and third start or stop holes 23A23C are formed at the center between the first, second and third mounting grooves 21A21C, respectively. In addition, although the first, second, and third start or stop holes 23A23C are four, the number of the first, second, and third start or stop holes 23A23C is appropriately changeable.

On the other hand, the swivel table 20 has a first, second, third location holes (24A24C) of different lengths so as to be adjacent to both sides of the first, second, third mounting grooves 21A21C on the reference circle Sc. Each is formed. Here, the lengths of the first, second, and third location holes 24A24C are preferably formed such that the length of the first location hole 24A is gradually increased toward the third location hole 24C.

As shown in FIG. 4, a circuit board 30 is installed below the swivel table 20, and an optical sensor 31 is mounted on the upper surface of the circuit board 30. 31 is mounted to be located below the reference circle Sc of the swivel table 20.

The optical sensor 31 is composed of a light emitting portion 32 for emitting and scanning an optical signal and a light receiving portion 33 for detecting the optical signal. The optical signal detected by the operation of the light receiving unit 33 of the optical sensor 31 is determined by the operation of a general microcomputer (not shown).

Here, the optical sensor 31 can be constituted by a general photo coupler using a light emitting diode and a light receiving diode.

On the other hand, the above-mentioned swivel table 20 shows the case where the first, second and third mounting grooves 21A21C are formed so that three disks D are mounted. It can be formed by modifying the structure appropriately to fit the mounting number.

That is, it is easily understood that the first, second and third mounting grooves 21A21c of the swivel table 20 can be produced by appropriately changing their numbers and positions according to the mounting numbers of the disks D.

Referring to the operation of the disk recognition device of the optical disk changer according to the present invention as described above are as follows.

As shown in Figs. 4 and 5, the disks D, i.e., the first and second disks D1, D2, and D3, are provided in the first, second and third mounting grooves 21A21C of the swivel table 20. Figs. In the mounted state, the tray 11 is slide-transferred to the inside of the main chassis 10.

Then, when the first, second, and third discs D1, D2, and D3 are mounted in the first, second, and third mounting grooves 21A21C of the swivel table 20, reproducing or recording them is performed. In order to select one of the disks D, for example, the first disk D1 of the first mounting groove 21A, the swivel table 20 is rotated according to the driving of the drive motor 13.

In addition, while the swivel table 20 is rotated, an optical signal is emitted from the light emitting unit 32 of the optical sensor 31 and scanned on the lower surface of the swivel table 20.

When the optical signal is emitted from the light emitting unit 32 of the optical sensor 31 and scanned in the first start or stop hole 23A of the swivel table 20 as described above, the optical signal is received by the light receiving unit 33 of the optical sensor 31. Detected as a start pulse at a low level.

The optical signal of the optical sensor 31 is sequentially scanned into the first recognition section 22A of the swivel table 20 and the first location hole 24A adjacent to both of the first recognition sections 22A. Detected at low level respectively. In short, the optical signal of the optical sensor 31 is detected at low level and high level by reflection and non-reflection of the disk D and the swivel table 20, respectively.

At this time, when the first disk D1 is mounted in the first mounting groove 21A, the first recognition section 22A detects the presence or absence of the first disk D1. That is, in the state where the first disc D1 is mounted in the first mounting groove 21A, the optical signal scanned from the light emitting part 32 of the optical sensor 31 is scanned into the center hole Dh to receive the light receiving part at a low level. It is detected at 33 and, accordingly, it is determined that the disc D is mounted in the control unit.

On the contrary, in the state where the first disc D1 is not mounted in the first mounting groove 21A, the optical signal scanned from the light emitting part 32 of the optical sensor 31 is scanned in the first recognition section 22A and is low. The light receiving unit 33 is detected at the level, whereby it is determined that the disk D is not mounted in the control unit. In short, the presence or absence of the disc D in the first recognition section 22A of the swivel table 20 is determined by the difference in the pulse width detected in the center hole Dh and the first recognition section 22A.

On the other hand, the first location holes 24A adjacent to both sides of the first recognition section 22A are formed to have different lengths from the second and third location holes 24B and 24C. Therefore, since the pulse widths detected by the light receiving unit 33 of the optical sensor 31 are different from each other in the first, second, and third recognition sections 22A22C, the control unit selects one selected by the user by the first location hole 22A. The position of the disc D can be determined.

After the position of the first disc D1 selected by the user is determined, the optical signal emitted from the light emitting part 32 of the optical sensor 30 is scanned to the second start or stop holes 23B to have a low level. It is detected by the control unit with a stop pulse.

When the stop pulse is detected by the control unit as described above, the drive of the drive motor 13 is stopped by the drive of the control unit, so that the first disc D1 selected by the user can be reproduced or recorded.

On the other hand, even when the second disk D2 or the third disk D3 of the disk D is selected by the user, the second and third recognition sections are operated by the same operation as that of the disk D1 described above. The second and third disks D2 or D3 selected by the user can be selected by the action of the 22B and 22C and the second and third location holes 24B and 24C.

Therefore, in the present invention, since the presence or absence of the disk D and position control are performed together by the optical sensor 30, the time required for the presence or absence of the disk D is greatly reduced. In addition, the operation time of the optical disc changer is greatly shortened, making the use of the product more convenient, and the number of parts is reduced, thereby reducing the production cost of the product.

In addition, since the first, second, and third start or stop holes 23A23C and the first, second, and third location holes 24A24C are formed when the swivel table 20 is manufactured, it is necessary to manufacture the swivel table 20. In addition to the simple structure of the mold, the molding operation of the swivel table 20 is easily performed to improve the productivity of the product.

On the other hand, the above embodiment is merely to describe one preferred embodiment of the present invention, the scope of application of the present invention is not limited to this, and can be changed appropriately within the scope of the same idea.

As described above, according to the disc recognition device of the optical disc changer according to the present invention, since the existence of the disc and the position control are efficiently performed by a simple configuration, the operation time of the optical disc changer is greatly shortened, and thus the use of the product becomes more convenient. As a result, the number of parts is reduced, thereby reducing the production cost of the product. In addition, since the structure of the swivel table is simply configured, the molding operation is easily performed to improve the productivity of the product.

Claims (2)

An optical disc player comprising a tray which is slidably transported inwardly in front of the main chassis, a clamp for selectively clamping one of a plurality of discs to a tentable, and a pickup unit for recording or reproducing information on the disc. To The first, second and third portions of the disc D are rotatably mounted in the center of the tray 11 and in the center of the first, second and third mounting grooves 21A21C in which the disc D is mounted on an upper surface thereof. The recognition sections 22A22C are formed to be open, respectively, and a plurality of first, second and third parts for controlling the rotation position on the reference circle Sc connecting the centers of the first, second and third mounting grooves 21A21C. Start or stop holes 23A23C are formed at predetermined intervals, and the first, second and third location holes 24A24C having different lengths are adjacent to both sides of the first, second and third mounting grooves 21A21C. A swivel table 20 respectively formed on Sc); The light emitting unit 32 and the light signal are mounted on the upper surface of the circuit board 30 installed below the swivel table 20 to be positioned below the reference source Sc. And a light sensor (31) composed of a light receiving portion (33) for detecting. The optical disc according to claim 1, wherein the length of the first, second, and third location holes 24A24C is gradually increased toward the third location hole 24C. Changer disc recognition device.