KR960009137Y1 - Apparatus for preventing disk duplicated loading - Google Patents

Abstract

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Description

Disc Overlap Loading Device

1 is a cross-sectional view illustrating a disk overlap loading prevention apparatus according to a conventional example.

FIG. 2 is a main part perspective view illustrating the disk overlap detection means shown in FIG.

3 is a block diagram of the disk overlapping loading prevention device shown in FIG.

4 is a view for explaining the installation position of the photoelectric sensor for detecting the disk overlap state in the disk overlap loading prevention apparatus according to the present invention.

5 is a view for explaining the disk overlap loading detection operation by the disk overlap loading prevention apparatus according to the present invention.

Figure 7 is a block diagram of a disk overlap loading prevention apparatus according to the present invention.

* Explanation of symbols for main parts of the drawings

10: spindle motor 12: turntable

13: chuck 14: chuck arm

15: flow member 16: working piece

17: rotary link member 18: switch member

42: controller 46: spindle servo meter

48: pickup servo meter 50: disc tray driving mechanism

60: tray 66: photoelectric sensor

67: turntable 70: data conversion unit

71: control unit 72: tray drive unit

The present invention relates to a disk overlap loading prevention device, and more particularly, by overlapping loading of disks by photodetecting a state in which a plurality of disks are superimposed on a disk turntable having a structure capable of mounting a plurality of types of disks. A disk overlap loading prevention apparatus is provided to prevent a disk from being damaged.

At present, a single disc playback system is designed to enable a plurality of types of playback such as a compact disc in which high-quality audio information is recorded and a laser disc in which audio information and video information are recorded. Disc trays designed to be loaded or mounted are employed.

In general, disc trays capable of loading or mounting a plurality of types of discs have a cross-section of each disc so that the disc trays can be loaded with 8 cm and 12 cm diameter compact discs and 20 cm and 30 cm diameter laser discs. It is formed in a step shape appropriately.

On the other hand, in the disc tray capable of loading a plurality of types of discs, a structure of a disc tray having a dedicated disc tray for compact discs of relatively small dimensions has also been proposed. According to this, for example, when an input for reproducing a compact disc is detected, only the compact disc dedicated tray is pulled out from the disc reproducing system to drive the disc tray.

However, according to the disc tray capable of loading such a plurality of types of discs, for example, when the disc tray is loaded into the disc reproducing system with the laser disc mounted on the compact disc, the disc is loaded during playback. When the turntable is rotated at a speed of approximately 1,800 rpm by the skins motor, the surfaces of the laser disks of the compact disks are rotated in contact with each other, thereby causing damage to the disks.

In order to prevent such a disc from being overloaded, the present applicant has disclosed a disc tray capable of mounting a plurality of discs in Korean Patent Application No. 93-24173 filed on Nov. 15, 1993. The present invention proposes an apparatus which detects a state in which a plurality of disks are mounted on the disk, performs abnormal processing, and performs ejection of the disk tray, thereby preventing damage due to overlapping of the disks.

That is, FIG. 1 is a cross-sectional view illustrating the disk overlap loading preventing device disclosed in Patent Application No. 93-24173, and FIG. 2 is a schematic perspective view of the disk overlap detecting means of the disk overlap loading preventing device shown in FIG. For example, the spindle motor 10 in the state in which the disk (D) to be mounted in the disc tray (not shown) that can be mounted on the motor shaft 11 of the spindle motor 10 indicated by reference numeral 10 is seated. The rotary turntable 12 is fastened and the chuck 13 and the chuck arm 14 which constitute chucking means to prevent the flow of the disk D mounted on the turntable 12 are turnedtable 12. It is provided to flow downward in the upward direction.

Around the chuck 13 is provided a flow member 15 having a hemispherical tip 15a corresponding to the peripheral shape of the chuck 13, as shown in FIG. 2. Is the turntable 12 to prevent the flow of the disk D mounted on the turntable 12 as shown in FIG. 1 when only one disk D is mounted on the turntable 12. ) Is designed to be spaced apart from the lower peripheral protrusion 13a of the chuck 13 in contact with each other by a magnetic force (preferably a distance slightly smaller than the thickness of one disk). The moving member 15 is connected to the moving member 15 via a rotating link member 17 which provides a turning point when the moving member 15 flows upward. As shown by the dotted line in FIG. 2, both ends are rotatably fixed to the lower side of the chuck arm 14.

A switch member 18 fixed to the bracket 19 attached to the chuck arm 14 is installed at the lower side of the operating piece 16 to mount a plurality of disks D on the turntable 12. In this case, the contact 18a is connected by the downward flow of the operation piece 16 to generate a disc overlap detection signal, and the flow member 15 is cut and curved at the center portion of the flow member 15. The buffer member 20 is formed, and the stopper 20 is in contact with the chuck arm 14 when a plurality of disks overlap and the flow member 15 flows upward. To prevent excessive flow and to act as a shock absorber when the operating piece 16 contacts the contact 16a of the switch member 16.

In addition, the one end (17a) of the rotary link member 17 is provided with an elastic spring 21 is supported by the upper and lower sides of the chuck arm 14, the flow in a state where a single disk (D) is mounted As shown in FIG. 1, the member 15 is biased so as to remain horizontal with respect to the lower peripheral protrusion 13a of the chuck 13.

According to the disk overlap loading prevention device configured as described above, when a single disc D is mounted on the turntable 12, the chuck 13 and the chuck arm 14 are coupled to the turntable 12 by a magnetic force. When the disk D is chucked, the flow member 15 does not come into contact with the lower peripheral protrusion 13a of the chuck 13, so that the flow member 15 is horizontal as shown in FIG. 1. Although a plurality of disks are overlapped and mounted on the turntable 12, the chucking state of the chuck 13 is performed corresponding to the thickness of the disks D1 and D2, and accordingly the chuck ( The lower peripheral periphery 13a of 13) causes the flow member 15 to flow upward.

The rotary link member 17 is in a state in which the cushioning portion 20 is in contact with the lower surface of the chuck arm 14 and the upward flow range of the flow member 15 is limited. It rotates in accordance with the flow of the flow member 15, the operation piece 16 is moved downward by the rotation of the rotary link member 17 to contact the contact 18a of the switch member 18 is performed do.

3 is a block diagram of a circuit for processing a disc overlap state detected by the disc overlap detection means, wherein reference numeral 40 is typically provided on the front panel of a disc playback system to close or close a disc tray. A tray in / out switch for performing a function related to an open, and 42 is a control regarding a tray in / out input of the tray from the tray in / out switch 40 while performing overall control of the disc reproducing system; A control unit which performs control on abnormal operation processing for disc overlap upon input from the switch member 18 which detects an overlapping state of a plurality of discs, and 44 denotes a disc reproducing program executed by the control unit 42; It is a stored storage unit. In addition, 46 indicates a spindle servometer that includes the spindle motor 10 to perform an action related to the rotational motion of the disk, and 48 indicates completion of the chucking operation for the disk D mounted on the turntable 12. Pick-up servo meter including a fill-up device (not shown) for reading the information recorded on the disk (D) at the time, 50 indicates the input or withdrawal of the disc tray in accordance with the input of the tray in / out switch 40 The disk tray driving mechanism that performs the operation is shown.

By the disk overlap loading prevention device configured as described above, first, when operation of the tray in / out switch 40 of FIG. 3 occurs, the control section 42 controls the disc playback program written in the storage section 44. By controlling the disc tray driving mechanism 50, the disc tray is pulled out, and when the disc is loaded while the disc tray is pulled out, and then the disc tray is inserted, the disc tray is mounted on the disc tray or more and inserted into the disc playback system. The inserted disk D is seated on the turntable 12. The disk D is seated on the turntable 12 and the chucking operation on the disk D is performed by the operation of the chuck arm 14 and the chuck 13 as shown in FIG. When the single disk D is seated on the turntable 12, the tip 15a of the flow member 15 constituting the disk overlap detection means does not come into contact with the lower peripheral protrusion 13a of the chuck 13. In the state shown in FIG. Therefore, when no input signal is provided from the switch member 18, that is, when the switch member 18 remains off, the controller 42 controls the spindle servo meter 46 to control the spindle motor 10. ) Rotates at a predetermined speed (approximately 1800 rpm), and when the spindle motor 10 rotates at the predetermined speed, the controller 42 controls the pickup servometer 48. Information recorded on the disc D is reproduced.

On the other hand, the disc tray mounted with the discs superimposed thereon is introduced into the disc reproducing system and seated on the turntable 12, and the chuck arm 14 is provided for the plurality of discs seated on the turntable 12. When the chucking operation by the chuck 13 is performed, the lower peripheral protrusion 13a of the chuck 13 is in a raised position by the thickness of one disk, and thus the flow member 15 and the operating piece 16 are operated. The rotary link member 17 is raised and lowered about the center. When the contact 18a of the switch member 18 is connected by the lowering operation of the operating piece 16 and applied to the control section 42 of FIG. 3 of the overlap detection signal of the plurality of disks, that is, the switch member 18 Is turned on, the control section 42 controls the disk tray drive mechanism 50 by performing an abnormal processing operation by disk overlap upon input of the disk overlap detection signal from the switch member 18. The disc tray loaded or loaded with the disc is to be taken out to the outside.

Therefore, the disk overlap loading prevention device detects a state in which a plurality of disks are loaded and loaded on a disk tray or more, and draws out the disk tray to prevent damage due to rotation of the disk. According to the structure for detecting the overloading of the disk, the upward flow by the lower peripheral protrusion 13a of the chuck 13 with respect to the operation of the chuck 13 in the chucking state according to the state in which the plurality of disks are superimposedly loaded. The flow member 15, or the buffer member 20 is in contact with the lower surface of the chuck arm 14 during the upward flow of the flow member 15, the flow member 17, the rotary link member 17 The mechanism by the operating piece 16 which moves downward by the rotation of the switch member 18 and connects the contact 18a of the switch member 18 is required.

The present invention has been made in view of the above circumstances, and a plurality of disks are superimposed using a photoelectric sensor in which a photopath is formed at a position slightly spaced from a central axis of a turntable in which a disk mounted and inserted into a disk tray is chucked. It is an object of the present invention to provide a disk overlapping loading preventing device which is designed to prevent a loading state.

In order to achieve the above object, according to the present invention, a disk tray capable of mounting a plurality of types of disks, a turntable for rotating the disk mounted on the disk tray while being rotated by the spindle motor, the disk rotated by the turntable A disc reproducing system comprising a chucking means for keeping it stable, comprising: disc overlap detection means for generating a signal for detecting a mounting state of a plurality of discs when a plurality of discs are mounted in the disc tray, and the disc overlap detection Provided is a disk overlapping prevention apparatus, comprising control means for performing a control for ejecting a disk tray when a state where a plurality of disks are mounted on the disk tray or more by means is detected.

Preferably, the disk overlap detection means comprises a photoelectric sensor of a light emitting element and a light receiving element that are installed to correspond to a position slightly spaced from the center of the turntable on both side frames of the disc tray. As the photopath is blocked by the disk loaded on the disk, the disk is loaded based on the change of the light receiving state.

According to the disk overlap loading prevention apparatus according to the present invention configured as described above, in the multi-screen playback system capable of mounting a plurality of types of disks, the overlapping loading of the disks is detected by using photoelectric sensors mounted oppositely on both sides of the disk tray. When the overlap loading of the disc is detected, the disc loss can be prevented by preventing the disc play operation from being executed.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

4 is a view for explaining the installation position of the photoelectric sensor for detecting the overlapping state of the disk in the disk overlap loading prevention apparatus according to the present invention, the reference numeral 60 in the same drawing as a disk tray capable of mounting a plurality of disks The disk tray 60 applied to the present invention is composed of a main tray 61 on which a larger size laser disk is mounted, and a sub tray (ie, a CD dedicated tray) 62 on which a compact disk of a smaller size is mounted. The structure is applied.

When the disc tray 60 is inserted into the disc reproducing system with a compact disc or a laser disc mounted thereon, it is seated on the turntable (see FIG. 5 or FIG. 6) by the chucking assembly 63. The light emitting element and the light receiving element of the photoelectric sensor 66 mutually cross each other at a point slightly off the center of the turntable on both side frames 64 of the disc tray 60 to photodetect whether or not a plurality of disks overlap on the turntable. It is installed opposite.

According to the light receiving element of the light emitting element of the photoelectric sensor 66 thus installed, the light emitting element 66a is provided in the state where only a single disc D1 is loaded on the turntable 67 as shown in FIG. 5 and FIG. While the light beam emitted from the light beam can be received by the light receiving element 66b, for example, when a plurality of disks D1 and D2 are superimposed on the turntable 67, the light beam emitted from the light emitting element 66a becomes the upper side. It is installed at a position blocked by the disk D2 and not received by the light receiving element.

7 is a block diagram of the disk overlapping loading prevention apparatus according to the present invention, and reference numeral 66 denotes a portion slightly deviated from the central axis of the turntable 66 at both frames 64 of the disc tray as described above. When only a single disk D1 is mounted on the turntable 66, the transmission path of the optical beam is not blocked, whereas when a plurality of disks D1, D2 are mounted on the turntable 67, the upper disk D2 is mounted on the turntable 67. Installed at a height at which the transmission path of the light beam is blocked, and indicates a photoelectric sensor for detecting an overlapping loading state of the disc, and 70 denotes a conversion of data about the overlapping loading state of the disc detected by the photoelectric sensor 66, The data conversion part for analog-digital conversion is shown. 71 is a control unit 71 for controlling the operation of the disc reproducing system according to whether or not the disc is superimposed on the basis of the data converted by the data conversion unit 70. If only the disk D1 of the disk D1 is detected to be mounted, the normal playback operation is controlled. On the other hand, when the disk D1 and D2 are detected to be mounted on the turntable 67, the disk playback operation is stopped. In addition, the discharge of the disc tray 60 is controlled.

72 drives the disc tray 60 for loading / unloading discs under the control of the control unit 71, and discharges the disc tray 60 under the control of the control unit 71 when detecting overlapping loading of a plurality of discs. The tray drive part to be shown is shown.

Next, the operation of the disk overlap loading prevention apparatus according to the present invention configured as described above will be described in detail.

First, when a compact disc, for example, is mounted on the disc tray 60 and inserted into the disc reproducing system and mounted on the turntable 67, as shown in FIG. 5, both frames of the disc tray 60 ( The light beam radiated from the light emitting element 66a of the photoelectric sensor 66 oppositely provided on the 64 is transmitted to the light receiving element 66b, whereby the light receiving element 66b outputs an output signal according to a single disk stuck state. Will occur. The signal is digitally leveled by the data conversion section 70 and then applied to the control section 71, whereby the control section 71 controls the normal playback operation on the disc to be executed.

On the other hand, when the compact disc is mounted, for example, a laser disc is superimposed on the disc tray 60, drawn into the disc reproducing system, and mounted on the turntable 67. The light beam emitted from the light emitting element 66a is blocked by the upper disk (for example, the laser disk) and is not transmitted to the light receiving element. Therefore, a signal corresponding to the disk overlapping loading state is applied from the light receiving element to the control unit 72 through the data conversion unit 70, and the control unit 72 prevents the disk from being damaged due to the disk overlap loading. In order to control the normal play operation for the disc, the disc tray drive unit 72 is driven to discharge the disc tray 60 to the outside of the disc reproducing system. Damage to the disk and the like can be effectively prevented.

As described above, according to the disk overlap loading prevention apparatus according to the present invention, the photoelectric sensor is installed on the side frame of the disk tray to detect the overlap loading state of the disk by blocking the transmission path of the optical beam when the disk overlaps By discharging the disc tray when the disc is overloaded, damage to the disc, which is caused when the disc play operation is performed in the disc overload state, can be easily prevented.

Claims (2)

A disc tray 60 capable of mounting a plurality of discs, a turntable 67 for rotating the disc mounted on the disc tray 60 while being rotated by a spindle motor, and a disc rotated by the turntable 67. In the disc reproducing system provided with the chucking means (63) which hold | maintains stably, The disc overlap detection means which generate | occur | produces the signal which detected the mounting state of a some disc, when a some disc is mounted in the said disc tray 60. 66 and control for discharging the disc tray 60 when the disc overlap detection means 66 detects a state in which a plurality of discs D1 and D2 are mounted on the disc tray 60. Disc overlap loading prevention device, characterized in that it comprises a control means for performing. According to claim 1, wherein the disk overlap detection means 66 is composed of an optical sensor installed to correspond to a position slightly spaced from the center of the turntable 67 on both frame 64 of the disk tray 60, The photoelectric sensor (66) is a disk overlapping loading prevention device, characterized in that the optical path is blocked by the disk (D2) mounted on the upper side when the disk overlapping loading to detect the disk overlapping loading state.