KR20050017710A - Sensing apparatus and method for detecting open/close of tray from an optical disk drive - Google Patents

Abstract

PURPOSE: A device and a method for detecting a tray opening/closing action of an optical disk drive are provided to detect an open-complete state of a tray from a disk drive by using a write prevention tab recognition switch of a disk cartridge or a switch for detecting a used surface of the disk cartridge, thereby reducing the number of parts of the disk drive. CONSTITUTION: The first and third projections(161,163) are separated from each other at certain intervals. The first contact switch(151) is selectively contacted with the first projection(161). The third contact switch(153) is used to detect whether a write prevention tab is on, on a disk surface of a disk cartridge in connection with a lower surface of the disk cartridge. The fourth contact switch(154) for detecting a groove formed on a disk is separated from the disk cartridge since a sub deck(115) is rotated downward. The fourth contact switch(154) is on by the third projection(163), and a tray is detected to be fully open.

Description

Sensing apparatus and method for detecting open / close of tray from an optical disk drive}

The present invention relates to a tray opening / closing detection device and method for an optical disk drive, and more particularly, in a disk drive for reproducing and recording information on a disk, detecting opening and closing of a tray having a disk cartridge inherent therein, and further comprising the disk cartridge. An apparatus and method for detecting the opening and closing of a tray of an optical disc drive for recognizing a mounting surface and a write protection tab of the same.

In general, an optical disc drive such as a CD-ROM, a DVD player, a CD / DVD RAM, or the like is a device that records information by reading light from a disk, which is a recording medium, or reads and reads information therefrom.

In recent years, the use of optical discs (for example, CD, DVD, BD, etc.) as an information recording / reproducing medium is increasing. Although generally contained in a tray in the form of a bare disk and loaded into a drive, the bare disk requires handling precautions because its surface is exposed to the outside. Accordingly, many disc cartridges are used to prevent damage to the disc and to facilitate handling. In particular, in a high capacity disc, a disc cartridge type storage medium is used to protect the disc from dust and fingerprints of human hands. need.

1 is an exploded perspective view showing an optical disk drive using a conventional disk cartridge.

Referring to FIG. 1, a disc drive includes a main deck 10 provided with a turntable 11 on which a disc D is seated, and an optical pickup 12 for performing recording / reproducing operation on the disc D; A tray 30 which accommodates the disc D or the cartridge 20 in which the disc D is accommodated, and is installed in and out of the main deck 10, and a cover covering the main deck 10 ( 40) and the like. The cover 40 is provided with an opening lever 41 for opening and closing the shutter 21 of the cartridge 20 and a clamper 42 for clamping the disk D on the turntable 11.

The turntable 11 and the optical pickup 12 are installed in the sub deck 15, and the sub deck 15 is formed in the groove formed in the main deck 10 by fixing protrusions 16 formed at both ends thereof. It is fixedly installed to act as a rotating shaft, the other side is formed with a rotating projection (not shown). This hinge protrusion is rotated along the guide groove 60a formed in the slider cam (60 of FIG. 3) mentioned later, and the sub deck 15 is rotated. That is, the disk cartridge 20 released from the chucked state is rotated upward when spaced apart from the disk cartridge 20 when it is written / recorded on the disk D, which is a recording medium, and rotated downward at other times. It becomes dischargeable. A cam slider (60 in FIG. 3) is provided for the rotation of the sub deck 15. The cam slider 60 converts its linear motion into the vertical rotational motion of the sub deck 15 while moving the hinge protrusion formed at one end of the sub deck 15 while reciprocating left and right through the guide groove (FIG. 60A). .

The cartridge 20 has holes 23 formed at both sides thereof in which the write-protect tab 24 is slidably received. In addition, a predetermined groove 25 is formed on one surface of the disc cartridge 20 next to the hole 23.

2 is a partial plan view of a front portion of the main deck showing a plurality of conventional contact switches, and FIG. 3 is a partial perspective view of the slider cam as viewed from the bottom.

Referring to FIGS. 2 and 3 together, in the arrow directions A and B, which are the moving directions of the slider cam 60, the lower portions of the slider cam 60 are predetermined in the arrow directions A, B and the arrow direction, respectively. The first and second protrusions 61 and 62 are formed to be spaced apart from each other. In addition, the main deck 10 is provided with contact switches 51 and 52 provided to be in contact with the protrusions 61 and 62 in a moving path of the first and second protrusions 61 and 62 in the A direction. .

When the tray 30 is closed, as the tray 30 enters in, the slider cam 60 moves in the direction of arrow B, and when the tray 30 is completely closed, the slider cam 60 moves to the rightmost side. The first protrusion 61 detects that the tray 30 is closed by operating the first contact switch 51.

On the other hand, on one end of the sub-deck 15, which is pivotally coupled to the main deck 10, third and fourth contact switches 53 and 54 described later are provided. These contact switches 53 and 54 contact the lower surface of the disc cartridge 20 with the sub deck 15 pivoted upward. When the disc cartridge 20 is seated on the tray 30 and entered into the disc drive, the third contact switch 53 is in contact with the write protect tab 24 when the disc write prohibition of the cartridge 20 is turned off or When the fourth contact switch 54 meets the groove 25 of the disc cartridge 20 and is drawn into the groove 25, the fourth contact switch 54 detects that the disk is turned on. It indicates that the first surface of is recorded / reproduced, and if it does not meet the groove, the switch is turned on to detect that the optical pickup device is opposed to the second surface of the disc D.

Conversely, when the tray 30 is opened and discharged out of the disk drive, the slider cam 60 is moved in the direction of the arrow A in the drawing by the rotation of a motor not shown to guide the pivoting protrusion that spans the guide groove 60a. By moving along the path of the groove 60a, the sub deck 15 descends downward, and the disc cartridge 20 is spaced apart from the turntable 11. And the tray 30 is opened. When the tray 30 is fully open, the slider cam 60 is completely moved in the direction of arrow B, as shown in FIG. At this time, the second protrusion 62 presses the second contact switch 52, and thus the tray 30 is detected to be completely open.

However, in the conventional optical disc drive, in addition to the switches 53 and 54 for detecting the write-protect tab of the disc cartridge 20 and the operation side of the disc drive, the loading completion of the tray 30 and the completion of opening are respectively detected. Since separate switches 51 and 52 are used, there is a problem in that the manufacturing cost increases because the number of switches is increased.

The present invention has been made to solve the above problems, using the switch for detecting the completion of the loading of the tray, the switch for detecting the write-protect tab of the disk cartridge or the switch for detecting the operating side of the disk drive to complete the opening of the tray An object of the present invention is to provide an apparatus and method for detecting a tray opening and closing of an optical disc drive.

An apparatus for detecting the opening and closing of a tray of an optical disc drive for achieving the above object includes a cam slider for rotating a sub deck on which an optical pickup is installed to the main deck, a tray for mounting a disc cartridge in and out of the disc drive body, and the sub In the tray opening and closing detection device of the optical disk drive having a contact switch for detecting the disk of the disk cartridge on the tray by a contact switch on the deck,

A first contact switch installed on the main deck;

A first protrusion configured to generate a loading completion detection signal of the tray when contacting the first contact switch under the slider cam; And

And a second protrusion for generating an open completion detection signal of the tray when the slider cam is in contact with a contact switch on the sub deck under the slider cam.

The disk detection contact switch,

Preferably, the contact switch detects a write-protect tab formed in the disk cartridge or the contact switch detects a used disk surface of the disk cartridge.

A tray opening and closing detection method of an optical disc drive for achieving the above another object includes a cam slider for rotating a sub deck on which an optical pickup is installed to the main deck, a tray for entering and exiting a disc drive body by mounting a disc cartridge, A contact switch for detecting a disk of the disc cartridge on the tray with a contact switch on a sub deck, a first contact switch provided on the main deck, and loading of the tray when contacting the first contact switch under the slider cam A first protrusion for generating a completion detection signal and a second protrusion for generating an open completion detection signal of the tray when contacting a contact switch on the sub deck under the slider cam; To

A first step of determining a state in which the first contact switch is off;

A second step of determining that the tray is open when it is determined that the first contact switch is in an off state and the disk detection contact switch is turned on; And

And if the first contact switch is on, determining that the tray is in a loading completion state.

In the second step, it is preferable to use a contact switch for detecting a write prohibition tab formed in the disk cartridge as the disk detection contact switch or a contact switch for detecting the use disk surface of the disk cartridge.

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

4 is a partial plan view of a detection apparatus of an optical disk drive according to a preferred embodiment of the present invention, and FIG. 5 is a partial perspective view of the slider cam as viewed from the bottom, and the same reference numerals as those of the conventional invention refer to the same components as those of the conventional invention. Are used and detailed description is omitted.

Referring to FIGS. 4 and 5, the lower portions of the slider cams 160 in the arrow directions A and B, which are the moving directions of the slider cams 160, are respectively predetermined in the arrows A and B directions and in the direction perpendicular to the arrow directions. The first and third protrusions 161 and 163 are formed to be spaced apart at intervals of the first and third protrusions 161 and 163. In addition, a first contact switch 151 is provided on the main deck 10 to selectively contact the first and third protrusions 161 and 163 with the first protrusion 161 in a movement path in the direction of arrow B. FIG.

When the tray 30 is opened to be discharged out of the disk drive, the slider cam 160 is moved in the direction of arrow A in FIG. 4 by the rotation of a motor, not shown, to guide the pivoting protrusion extending over the guide groove 160a. By moving to the right in the drawing along the path of the groove 160a, the sub deck 15 is lowered downward, and the disc cartridge 20 is spaced apart from the turntable 11. And the tray 30 is opened. When the tray 30 is fully open, the slider cam 160 is moved completely to the left side of the arrow B, as shown in FIG. In this case, since the first contact switch 151 is spaced a predetermined distance from the first protrusion 161 to the right, the first contact switch 151 is turned off. Therefore, the first contact switch 151 may not detect whether the tray 30 is in an open state.

On the other hand, the third contact switch 153 which is in contact with the lower surface of the disk cartridge 20 and used to detect whether the write-protect tab 24 is turned on the corresponding disk D surface of the disk cartridge 20. The fourth contact switch 154 detecting the groove 25 formed in the disk D is spaced apart from the disk cartridge 20 because the sub deck 115 is rotated downward. At this time, any one of these contact switches 153 and 154, for example, the fourth contact switch 154 is turned on by the third protrusion 163 as shown in FIG. 5, and at this time, the tray 30 is detected to be fully open. do.

Conversely, when the tray 30 is closed, as the tray 30 enters the disc drive, the slider cam 160 is moved in the arrow B direction as shown in FIG. 6, and the slider cam when the tray 30 is completely closed. 160 moves to the rightmost side, and the first protrusion 161 detects that the tray 30 is closed by operating the first contact switch 151. At this time, as shown in FIG. 6, the sub deck 15 is rotated upwards such that the third and fourth contact switches 153 and 54 contact the lower surface of the disc cartridge 20. When the disc cartridge 20 is seated on the tray 30 and entered into the disc drive, the third contact switch 153 is in contact with the write protect tab 24 when the disc write prohibition of the cartridge 20 is turned off or The fourth contact switch 154 meets the groove 25 of the disc cartridge 20 and is drawn into the groove 25 so that the fourth contact switch 154 is not pressed. It indicates that the first surface is recorded / reproduced, and when it does not meet the groove, the switch is turned ON to detect that the optical pickup device is opposed to the second surface of the disc D.

As described above, according to the apparatus for detecting and opening a tray of an optical disc drive according to the present invention, a tray is opened from a disc drive by using a write prohibition tap recognition switch of a disc cartridge or a switch for detecting a use surface of the disc cartridge. Can be detected by a single switch, thus reducing the number of parts of the disk drive and improving the reliability of the switches, which are detection devices.

In the above description, a preferred embodiment of the tray opening / closing detection apparatus of the optical disk drive according to the present invention has been described, but it is merely an example, and those skilled in the art may make various modifications and other equivalent embodiments therefrom. Will understand. Therefore, the true technical protection scope of the present invention will be defined by the appended claims.

1 is an exploded perspective view showing an optical disk drive using a conventional disk cartridge.

2 is a plan view of a part of the front side of the main deck showing a plurality of conventional contact switches.

3 is a partial perspective view of the slider cam as viewed from the bottom.

4 is a partial plan view of a tray opening and closing detection apparatus according to an exemplary embodiment of the present invention.

5 and 6 are partial perspective views seen from the bottom of the slider cam.

<Description of the symbols for the main parts of the drawings>

20: disc cartridge 110: main deck

115: Sub deck 151,153,154: contact switch

160: slider cam 161,163: protrusion

Claims (6)

A cam slider for rotating the sub-deck on which the optical pickup is installed to the main deck, a tray for mounting the disc cartridge in and out of the disc drive main body, and a contact switch on the sub-deck to detect the disc of the disc cartridge on the tray. In the tray opening and closing detection device of an optical disk drive having a contact switch, A first contact switch installed on the main deck; A first protrusion configured to generate a loading completion detection signal of the tray when contacting the first contact switch under the slider cam; And a second protrusion for generating an open completion detection signal of the tray when the slider cam is in contact with a contact switch on the sub deck at a lower portion of the slider cam. The method of claim 1, The disk detection contact switch, And a contact switch for detecting a write prohibition tab formed on said disk cartridge. The method of claim 1, The disk detection contact switch, And a contact switch for detecting a use surface of the disc cartridge. A cam slider for rotating the sub-deck on which the optical pickup is installed to the main deck, a tray for mounting the disc cartridge in and out of the disc drive main body, and a contact switch on the sub-deck to detect the disc of the disc cartridge on the tray. A contact switch, a first contact switch provided on the main deck, a first protrusion for generating a loading completion detection signal of the tray when the first contact switch is in contact with a lower portion of the slider cam, and a lower portion of the slider cam. In the method of detecting the opening and closing of the tray of the optical disk drive having a second protrusion for generating an open completion detection signal of the tray when contacting the contact switch on the sub deck, Determining a state in which the first contact switch is off; Determining that the tray is open when the first contact switch is determined to be in an off state and the disk detection contact switch is turned on; And And determining that the tray is in a loading completion state, when the first contact switch is on. The method of claim 4, wherein the second step, And a contact switch for detecting a write prohibition tab formed on the disk cartridge as the disk detection contact switch. The method of claim 4, wherein the second step, And a contact switch for detecting a used disk surface of the disk cartridge as the disk detection contact switch.