JPH08147846A - Disk recording/reproducing device - Google Patents

Abstract

PURPOSE: To prevent dust, etc., from entering a cartridge when the cartridge is left alone in a disk recording/reproducing device for a long time. CONSTITUTION: The disk recording/reproducing device is provided with a switch 5 detecting that the cartridge 1 has been inserted into a prescribed position in the device, a hook 7, a timing belt 8, pulleys 9, 10, a warm wheel 14, a warm gear 15 and an opening/closing motor 16 opening/closing the shutter 3 of the cartridge 1, a shutter open detection SW 12 and a shutter close detection SW 13 detecting that the shutter 3 is opened/closed. The device is provided with a microcomputer performing access operation for a disk 2 in the cartridge 1 while the cartridge 1 is inserted, and the opening of the shutter 3 is detected by the shutter open detection SW 12, and thereafter, controlling the opening/ closing motor 16 and closing the shutter 3 when no input of an operation command exists for a prescribed time or longer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc recording / reproducing apparatus such as a disc player which uses a cartridge containing a disc-shaped recording medium.

[0002]

2. Description of the Related Art In recent years, the technical progress of a disc reproducing apparatus for reproducing information on a digital disc represented by a compact disc (CD) and a laser disc (LD) has been remarkable. Recently, a data compression technique for writing data at a high density in a conventional recording surface of a disc has been constructed for the purpose of recording a large amount of data on a digital disc.

Under such circumstances, a disc reproducing apparatus, for example, a disc player, etc. must prevent data recognition error due to foreign matter such as dust and fingerprints when discriminating data on the disc. In the same sense, it is necessary to prevent data loss due to scratches.

Therefore, in order to prevent the above and protect the disk from complicated handling by the user, the disk is often handled in a form of being housed in a cartridge.

The existing media include recording media such as floppy disks, magneto-optical disks and CD-ROMs.

Such a cartridge is provided with a mechanical mechanism for automatically closing the shutter when the cartridge is ejected from the disc player.

For example, when reproducing data such as a CD-ROM with a disc player, the CD-ROM is usually inserted into the slot together with the cartridge, the shutter provided in the cartridge is opened, and the hole of the opened shutter is used. Data is read by shining light from the pickup onto the disk surface.

In the slot of the disc player body, when the cartridge is inserted, the shutter is always opened regardless of whether or not data is being read.

However, if the CD-ROM is left for a long time with the shutter open, dust and the like may float in the slot, so that foreign matter such as dust may adhere to the disk surface. If dust or the like adheres to the disc surface, the disc player causes an error in recognizing high-density recorded data as described above, and correct data cannot be reproduced.

[0010]

As described above, in the conventional disk recording / reproducing apparatus, when the cartridge is left inside the apparatus for a long time, the shutter of the cartridge is always open, so that dust, dirt, etc. However, there is a problem that the foreign matter may adhere to the disc surface and correct data may not be reproduced from the disc.

The present invention has been made to solve the above problems, and prevents foreign matter such as dust and dirt from adhering to the disk surface when the cartridge is left inside the apparatus for a long time. It is an object of the present invention to provide a disc recording / reproducing device that can always reproduce correct data from a disc.

[0012]

In order to achieve the above-mentioned object, a disk recording / reproducing apparatus according to a first aspect of the present invention is such that when a cartridge containing a disk-shaped recording medium is inserted into the apparatus, In a disc recording / reproducing apparatus that opens a shutter and performs an access operation to the recording medium, a cartridge detection unit that detects that the cartridge is inserted into a predetermined position in the apparatus, and a cartridge detection unit that is inserted into a predetermined position in the apparatus. The shutter opening / closing means for opening / closing the shutter of the cartridge and the shutter opening / closing means when a predetermined operation command is input from the outside while the cartridge detection means detects the insertion of the cartridge. Shutter release instructing means for instructing to open the shutter, and the shutter Shutter opening / closing detection means for detecting that the shutter of the cartridge has been opened / closed by the shutter opening / closing means, and for the recording medium in the cartridge while opening of the shutter is detected by the shutter opening / closing detection means. And a shutter closing instruction means for instructing the shutter opening and closing means to close the shutter when the operation command is not input to the access means for a predetermined time or more. There is.

A disk recording / reproducing apparatus according to a second aspect is
2. The disc recording / reproducing apparatus according to claim 1, wherein the shutter opening / closing means moves a hook that engages with a groove provided in the shutter and the hook when the cartridge is inserted into a predetermined position in the apparatus. And a gear mechanism and a motor for driving the belt.

A disk recording / reproducing apparatus according to a third aspect of the present invention is
2. The disc recording / reproducing apparatus according to claim 1, wherein the shutter opening / closing detection means is turned on by a protrusion provided on a belt of the shutter opening / closing means and the protrusion that moves together with the belt when the shutter is opened. The switch includes an open detection switch and a shutter close detection switch that is turned on by the protrusion that moves together with the belt when the shutter is closed.

[0015]

According to the present invention, first, when the shutter opening / closing detecting means detects that the cartridge is inserted into the apparatus, the shutter opening / closing means opens the shutter of the cartridge, and then the access operation to the disk in the cartridge is performed. That is, the operation of reading data from the disk is performed.

After the data is read, if the state where the disc is not accessed is continued for a predetermined time or longer after the operation command is input, the shutter opening / closing means closes the shutter of the cartridge. That is, the opening / closing operation of the shutter of the cartridge is performed depending on whether the access operation to the disk is within a predetermined time or not. The opening / closing operation of the shutter here is such that when the cartridge is inserted into a predetermined position in the device, the hook of the belt is engaged with the groove provided in the shutter, and then the belt is driven by the motor and the gear mechanism to be operated by the hook. The shutter is moved and performed.

As the shutter opening / closing detection operation, when the shutter is opened, the protrusion provided on the belt moves together with the belt, and when the shutter open detection switch is turned on by the protrusion, the shutter release is detected. Further, when the shutter is closed, the protrusion moves together with the belt, and when the shutter close detection switch is turned on by the protrusion, the shutter close is detected.

Therefore, even if the cartridge is left inside the apparatus for a long time, the shutter is closed inside, so that no foreign matter such as dust or dust enters the cartridge.

As a result of the above, foreign matter such as dust and dirt does not adhere to the disk surface in the cartridge, and correct data can always be reproduced from the disk.

[0020]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a diagram showing the structure of a disk recording / reproducing apparatus according to an embodiment of the present invention. In the figure, 1 is a cartridge having a U-shaped pickup window 1a. In the cartridge 1, a disc 2 from which information is read out optically or magnetically, such as an optical disc or a magnetic disc, is housed. This cartridge 1
A shutter 3 is provided on the surface of the so as to cover the pickup window 1a, and is constantly urged in a closing direction by a spring or the like. The cartridge 1 has a structure in which it is opened by externally hooking and sliding in a groove 3a provided in a part of the shutter 3.

On the other hand, a pair of guides 4a and 4b are provided at the cartridge insertion opening of the disc recording / reproducing apparatus main body into which the cartridge 1 is inserted, and the cartridge 1 is guided by these guides 4a and 4b. It is inserted inside the device (direction of arrow A). At one end of the guide 4a, a cartridge detection switch 5 for detecting the insertion of the cartridge 1 is provided. A lever 6 that engages with one end of the cartridge 1 and turns on the switch 5 when the cartridge 1 reaches a predetermined position inside the apparatus is provided near the guide 4a.

Inside the apparatus, a hook 7 for opening and closing the shutter, which engages with the groove 3a of the shutter 3 when the cartridge 1 reaches a predetermined position inside the apparatus, is provided on the timing belt 8. The timing belt 8 is stretched by pulleys 9 and 10 so as to rotate in a direction orthogonal to the insertion direction of the cartridge 1 (sliding direction of the shutter 3). A projection 11 is provided on the timing belt 8 and moves together with the timing belt 8. In addition, a shutter open detection SW (switch) 12 that is turned on by the protrusion 11 at a position where the shutter 3 is fully opened is provided in this device. Further, in this device, a shutter close detection S that is turned on by the protrusion 11 at the position where the shutter 3 is closed is provided.
A W (switch) 13 is provided. Further, a worm wheel 14, a worm gear 15, and an opening / closing motor 16 for rotating the pulley 10 are provided inside the device, and the timing belt 8 is rotated by the driving of the opening / closing motor 16 and the hook 7 and the protrusion 11 are formed. Is designed to move. The position where the timing belt 8 is stopped before the cartridge is inserted is set such that the projection 11 turns on the shutter close detection SW 13 and the hook 7 meshes with the groove 3a of the closed shutter 3.

The operation of the disc recording / reproducing apparatus will be described below with reference to the flow chart of FIG. 2 and FIG.

In the case of this device, a microcomputer incorporated in the device controls all operations.

Therefore, first, when the set power source is turned on (step 201 in FIG. 2), the microcomputer determines from the state of the switch 5 whether or not the cartridge 1 is inserted (steps 202 and 203).
). For example, if the switch 5 is on (step 204
), It is determined that the cartridge 1 is inserted.

If the switch 5 is off (step 205), it is determined that the cartridge 1 is not inserted.

Subsequently, the microcomputer confirms the states of the shutter open SW 12 and the shutter close detection SW 13 (step 206, step 207).

If it is confirmed that the shutter open detection switch 12 is turned on (step 206), the data reading routine (access operation) of the disk 2 is started (step 208).

On the other hand, in step 207 when the cartridge 1 is not inserted, the opening / closing hook 7 is set to the position shown in FIG.
The timing belt 8 must be stopped at the position shown in, that is, the position where the shutter close detection switch 13 is turned on.

Therefore, the microcomputer drives the open / close motor 16 if the shutter close detection switch 13 is in the off state (step 209), and turns on the open / close motor 16 when the shutter close detection switch 13 is turned on (step 210). Stop (step 211).

If the shutter close detection switch 13 is turned on in step 207, the process waits for the cartridge 1 to be inserted.

Here, as shown in FIG. 3, the cartridge 1 is inserted into the apparatus (step 212), and the lever 6 is rotated in the direction of arrow B by one end of the cartridge 1,
When the cartridge detecting switch 5 is turned on (step 213), the microcomputer reverses the opening / closing motor 16 (step 214). As a result, the timing belt 8 rotates, and the hook 7 moves the shutter 3 and the protrusion 11 to. When the shutter open detection switch 12 is turned on by the protrusion 11 (step 215
), The microcomputer stops the opening / closing motor 16 (step 216), rotates the disc 2 with the shutter open, and starts a data reading routine (access operation) of the disc 2 by the pickup (step 217). After reading the data in the disk 2, the microcomputer starts the time measurement by operating the internal timer and waits for the input of an operation command from the outside.

When an operation command is input from the outside within a predetermined time, for example, within 30 seconds, the processing of the operation command is executed.

For example, when a command for ejecting the cartridge 1 is input within 30 seconds (step 218), the rotation of the disk 2 is stopped (step 219) and the opening / closing motor 16
Is driven (step 220). When the shutter close detection switch 13 is turned on (step 221), the opening / closing motor 16 is stopped (step 222). Then, the loading function is operated to eject the cartridge 1 (step 223), and when the cartridge detection switch 5 is turned off, it is determined that the cartridge is not inserted (step 224), and the cartridge ejection operation is completed.

When a power off command or the like is input within 30 seconds (step 225), the rotation of the disk 2 is stopped (step 226) and the opening / closing motor 16 is driven (step 227). Then, the shutter close detection switch 13
When is turned on (step 228), the opening / closing motor 16 is stopped (step 229).

On the other hand, if no operation command is input from the outside within 30 seconds (step 230), the microcomputer shifts to the shutter closing operation.

That is, the rotation of the disk 2 is stopped (step 231), the opening / closing motor 16 is driven (step 232), and when the shutter close detection switch 13 is turned on (step 233), the opening / closing motor 16 is stopped (step 233). Step 234).

When an operation command is input from the outside, the microcomputer reverses the opening / closing motor 16 (step 236), and when the shutter open detection switch 12 is turned on (step 237), the opening / closing motor 16 is stopped. (Step 238). Thereafter, the processing from step 218 described above is repeated.

As described above, according to the disc recording / reproducing apparatus of this embodiment, after the cartridge 1 is inserted into the main body, the shutter 3 is released and the data of the disc 2 is read. Otherwise, since the opening / closing motor 16 is controlled to close the shutter 3, even if the cartridge 1 is left in the apparatus for a long time, dust, dust, etc. do not enter the cartridge 1 through the U-shaped pickup window 1a. These foreign substances do not adhere to the surface of the disc 2, and correct data can always be reproduced from the disc 2 or data can be recorded on the disc 2.

Although the mechanical switches 12 and 13 are used to detect the position of the opening / closing hook 7 in this embodiment, an optical sensor may be used. Open / close motor 1
As 6, it is desirable to use a stepping motor or the like that can accurately control forward rotation and reverse rotation.

[0042]

As described above, according to the disk recording / reproducing apparatus of the first aspect, even if the cartridge is left in the set for a long time, the shutter of the cartridge is closed when the operation command is not input for a predetermined time or more. As a result, dust, dust, etc. will not enter the cartridge, these foreign substances will not adhere to the disc surface, and correct data can always be reproduced from the disc.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a disc recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the disc recording / reproducing apparatus.

FIG. 3 is a diagram showing a state in which a shutter is released in this disc recording / reproducing apparatus.

[Explanation of symbols]

1 ... Cartridge, 1a ... Pickup window, 2 ... Disc, 3 ... Shutter, 3a ... Groove, 4a, 4b ... Guide,
5 ... switch for cartridge detection, 6 ... lever, 7 ...
Opening / closing hook, 8 ... Timing belt, 9, 10 ... Pulley, 11 ... Projection part, 10, 11 ... Pulley, 12 ... Shutter open detection SW (switch), 13 ... Shutter close detection SW (switch), 14 ... Worm wheel , 15
… Worm gear, 16… Open / close motor.

Claims (3)

[Claims] 1. A disc recording / reproducing apparatus which opens a shutter of the cartridge to perform an access operation to the recording medium when a cartridge accommodating a disc-shaped recording medium is inserted into the apparatus. Cartridge detecting means for detecting that the cartridge is inserted at a position, shutter opening and closing means for opening and closing the shutter of the cartridge inserted at a predetermined position in the apparatus, and insertion of the cartridge by the cartridge detecting means. When a predetermined operation command is input from the outside while being detected, shutter opening instruction means for instructing the shutter opening and closing means to open the shutter, and the shutter of the cartridge by the shutter opening and closing means. Detects that the A shutter opening / closing detection unit, an access unit for performing an access operation to the recording medium in the cartridge while the shutter opening / closing detection unit detects the opening of the shutter, and an operation command for the access unit. A disc recording / reproducing apparatus comprising: a shutter closing instruction means for instructing the shutter opening / closing means to close the shutter when there is no input for a predetermined time or more. 2. The disc recording / reproducing apparatus according to claim 1, wherein the shutter opening / closing means engages with a groove provided in the shutter when the cartridge is inserted into a predetermined position in the apparatus, A disc recording / reproducing apparatus comprising: a belt for moving the hook; and a gear mechanism and a motor for driving the belt. 3. The disc recording / reproducing apparatus according to claim 1, wherein the shutter opening / closing detection unit has a protrusion provided on a belt of the shutter opening / closing unit, and the protrusion that moves together with the belt when the shutter is opened. 2. A disc recording / reproducing apparatus comprising: a shutter open detection switch that is turned on by the switch; and a shutter close detection switch that is turned on by the protrusion that moves together with the belt when the shutter is closed.