JPH0630986U - Disk device - Google Patents

Abstract

(57) [Abstract] [Purpose] To reduce the cost by simplifying the head control mechanism. [Structure] A detection unit 8 engaging with a recording window of a recording / reproducing cartridge 92 is arranged on a lever 3 of a head 2. When the cartridge 92 is for recording / reproducing, the detecting portion 8 engages with the recording window of the cartridge 92 so that the head 2 faces the disk. When the cartridge 97 is exclusively for reproduction, the detection unit 8 contacts the upper surface of the cartridge 97 and the head 2 separates from the cartridge 97. The detection unit 8 engages with the recording window of the cartridge 92 so that the head 2 automatically opposes the disk. Therefore, a motor for moving the head, etc., as in the conventional case, can be dispensed with. The cost can be reduced by a simpler configuration than the mechanical mechanism for controlling the head.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a disk device in which a cartridge containing a disk is housed in a holder for recording and reproducing.

[0002]

[Prior art]

 It has been proposed to house the disc in a cartridge. In addition, as cartridges, a recording / playback type and a playback only type have been proposed. 8 and 9 show an example thereof, FIG. 8 shows a recording / reproducing cartridge 92, and FIG. 9 shows a reproducing-only cartridge 97.

First, the structure of the recording / reproducing cartridge 92 will be described. In FIG. 8, reference numeral 90 is a disk, and this disk 90 is a rewritable magnetic material capable of repeatedly recording and reproducing data (information) by, for example, magneto-optical means. The information compression technique records the amount of information for a predetermined time.

Reference numeral 92 is a recording / reproducing cartridge, and the disk 90 is housed in the cartridge 92. A hole 93 for exposing the clamping plate 91 of the disk 90 is formed in the center of the lower surface of the cartridge 92.

Further, the cartridge 92 is provided with shutter windows 94 and 95 on its upper and lower surfaces. Then, a shutter 96 for opening or closing the shutter windows 94, 95 is slidably attached to the cartridge 92. As shown in FIG. 8, the shutter 96 is formed in a U shape so as to correspond to the shutter windows 94 and 95, respectively.

Next, the structure of the reproduction-only cartridge 97 will be described. A shutter window 94 is formed only on the lower surface of the reproduction-only cartridge 97, as shown in FIG. That is, the shutter window is not formed on the upper surface of the cartridge 97. Therefore, the shutter 98 is formed only in a portion corresponding to the shutter window 94, as shown in FIG.

Data is recorded in advance on the read-only disc 90 shown in FIG. Other configurations are similar to those in FIG.

A recording / reproducing disc device for recording / reproducing data on / from the disc 90 shown in FIG. 8 or FIG. 9 has, for example, a holder for accommodating the cartridge 92 or 97 and a disc accommodated in this holder. A head for recording information on 90 and an optical pickup used for recording or reproduction are arranged so as to be opposed to each other.

To record or write information on the disc 90, the head moves so as to face the disc 90, and then a laser beam is emitted from the optical pickup to momentarily heat the disc 90 at a pinpoint. This is done by applying magnetism from the head which is in contact with the disk 90 or slightly floating.

To reproduce or read information on the disc 90, the laser beam from the optical pickup is reflected by the disc 90 and the reflected beam is used.

[0011]

[Problems to be solved by the device]

 By the way, for example, when recording after reproduction using the recording / reproducing cartridge 92, the head stands by above the cartridge 92 (disk 90) at the time of reproduction, and at the time of recording, it is determined whether the cartridge is for recording / reproduction or reproduction-only. Etc., the motor for moving the head is rotated by the control signal from the sensor to drive the head lever that supports the head. By this drive, the head moves toward the disk 90.

Therefore, in the recording / reproducing disk device, a head moving mechanical mechanism requires a head moving motor or the like, which causes a problem that the structure becomes complicated and the cost becomes high.

Therefore, an object of the present invention is to reduce the cost by simplifying the head control mechanism in the recording / reproducing disk device.

[0014]

[Means for Solving the Problems]

 In this invention, a disc for accommodating a reproduction-only cartridge having a reproduction window formed on one surface or a recording / reproduction cartridge having recording and reproduction windows formed on both surfaces is stored together with the cartridge. Holder, a head for recording information on the disc, and a detection means for engaging with a recording window of a cartridge disposed integrally with the head, and when the cartridge is for recording / reproducing, the detection means has a window of the cartridge. The head is configured to face the disk by being engaged.

[0015]

[Action]

 When the recording / reproducing cartridge 92 is housed in the holder 1, the detecting means 8 engages with the window 95 of the cartridge 92, and the head 2 is held facing the disk 90. Then, recording or reproduction is performed in this holding state.

When the reproduction-only cartridge 97 is housed in the holder 1, the detecting means 8 contacts the cartridge 97 and holds the head 2 and the cartridge 97 in a separated state. Note that the reproduction is performed, for example, by using the window 94 opened when the cartridge 97 is stored. That is, the detecting means 8 engages with the recording window 95 of the cartridge 92 so that the head 2 automatically opposes the disk 90. A moving motor or the like can be eliminated. Therefore, the structure can be simpler than that of the conventional head controlling mechanical mechanism, and the cost can be reduced. Further, in the conventional device, it took time to change the mode when recording after reproduction, but in the case of this invention, it is possible to change the mode instantaneously.

[0017]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a diagram showing a main part of a mechanical mechanism for controlling a head of a disk device. The disk device is for recording / reproducing used when recording or reproducing the disk 90 shown in FIG. 8 or 9.

In FIG. 1, reference numeral 1 is a holder of the disk device, and this holder 1 is for holding the cartridges 92 and 97. A movable chassis 20 moves the holder 1 up and down to a certain height. Reference numeral 30 denotes a fixed chassis, and this fixed chassis 30 regulates the movement of the holder 1 in the vertical direction. Then, the holder 1 is arranged so as to be able to move up and down on the fixed chassis 30 via the movable chassis 20.

As shown in FIGS. 1 and 2, the holder 1 is provided with an opening 1 a on its upper surface at a portion corresponding to a head 2 and a detecting portion 8 which is a detecting means which will be described later. The opening 1a is formed at a position corresponding to the shutter window 95 of the recording / reproducing cartridge 92.

As shown in FIG. 3, the holder 1 has an opening 1c formed on the lower surface thereof at a portion corresponding to a pickup 5 described later. Further, the opening 1c is formed at a portion corresponding to the shutter window 94 of the cartridges 92 and 97.

As shown in FIG. 3, the holder 1 is provided with a pair of four pins 1 b on both side surfaces thereof so as to project. As shown in FIG. 1, the pin 1b engages with a groove 21 of a movable chassis 20 and a groove 31 of a fixed chassis 30 described later.

Reference numeral 2 denotes a head, and the head 2 is arranged above the portion of the holder 1 facing the opening 1 a. The head 2 is fixed to the tip of the lever 3, as shown in FIGS. The lever 3 is rotatably supported by the movable member 4. In this example, a non-contact type head mechanism will be described.

As shown in FIGS. 1 to 3, the lever 3 is composed of three plates so as to be flexible. The lever 3 has an engaging portion 7 formed in a bent shape at substantially the center thereof so as to come into contact with the upper surface of the holder 1. Further, the lever 3 is provided with a detecting portion 8 as a detecting means at substantially the center between the head 3 and the engaging portion 7.

The detection unit 8 is configured to engage with the recording window 95 of the cartridge 92 when the recording / reproducing cartridge 92 is housed in the holder 1. Further, the detection unit 8 is configured to come into contact with the upper surface of the cartridge 97 when the reproduction-only cartridge 97 is housed in the holder 1.

Reference numeral 9 is a stopper, and this stopper 9 is arranged on the movable member 4. The stopper 9 is for preventing the detector 8 from coming into contact with the disc 90 through the shutter window 95 when the recording / reproducing cartridge 92 is housed in the holder 1. That is, the stopper 9 regulates the rotation of the lever 3.

The movable member 4 shown in FIG. 2 is provided with an optical pickup 5 at a portion facing the head 2. The movable member 4 is arranged so as to be slidable in the left-right direction (see FIG. 3). That is, the movable member 4 moves via a worm gear (not shown) when a motor (not shown) rotates.

Reference numeral 6 denotes a spring, which is mounted between the lever 3 and the movable member 4 (see FIG. 2). Therefore, the lever 3 is always biased counterclockwise by the biasing force of the spring 6.

A groove 21 as shown in FIG. 1 is formed on a side surface of the movable chassis 20 corresponding to the pin 1b of the holder 1. The movable chassis 20 is slidably arranged on a mechanical chassis (not shown) via a spring 22. The movable chassis 20 is always urged to the front side by the urging force of the spring 22, as shown in FIG. The movable chassis 20 is always held at the position shown in FIG. 1 by a locking means (not shown).

In the fixed chassis 30, a groove 31 is formed in the side surface of the fixed chassis 30 at a position corresponding to the pin 1b of the holder 1 along the vertical direction. The fixed chassis 30 is fixed to a mechanical chassis (not shown). Further, a disc clamper 10 shown by a chain double-dashed line in FIGS. 5 and 6 is rotatably arranged in the mechanical chassis.

First, the case where the recording / reproducing cartridge 92 is housed in the holder 1 will be described. The cartridge 92 is inserted into the holder 1 in a state where the cartridge 92 is opposed to the insertion port P of the holder 1 (the state shown by the two-dot chain line in FIG. 1 and the solid line in FIG. 3). With this insertion, the shutter 96 slides by the release mechanism of the holder 1 (not shown) to open the shutter windows 94 and 95.

Simultaneously with this insertion, the locking means (not shown) that holds the movable chassis 20 at a fixed position (the position shown in FIG. 1) is unlocked, and the movable chassis 20 becomes a spring. The urging force of 22 moves to the front side. By this movement, the pin 1b of the holder 1 is regulated by the groove 21 of the movable chassis 20 and the groove 31 of the fixed chassis 30, and is moved downward to lower the holder 1.

Further, as the holder 1 descends, the lever 3 tilts counterclockwise until the engaging portion 7 contacts the holder 1 by the biasing force of the spring 6 until it contacts the stopper 9. When the lever 3 is stopped (the state shown by the chain double-dashed line in FIG. 4), the head 2, the detecting portion 8 and the engaging portion 7 arranged on the lever 3 are separated from the disc 90 and the cartridge 92. (See FIG. 5).

That is, the detection unit 8 engages with the recording window 95 of the cartridge 92 so that the head 2 automatically faces the disk 90. In FIG. 5, only the head 2 and the detector 8 are shown.

As described above, since the head 2 and the optical pickup 5 are arranged to face the movable member 4, the head 2 and the optical pickup 5 move in a state of facing each other. Then, reproduction is performed by reflecting the laser beam from the optical pickup 5 facing the shutter window 94 on the disc 90 and utilizing the reflected beam.

Further, recording is performed by emitting a laser beam from the optical pickup 5 to momentarily heat the disc 90 at a pinpoint, while applying a magnetism from the head 2 in a state of being separated from the disc 90.

Further, when recording after reproduction, recording is continuously performed by the head 2 which is positioned in the reproduction state (position shown by the chain double-dashed line in FIG. 4). That is, according to this example, when recording after reproduction, it is possible to eliminate the time required to move the head 2 from the reproduction state to the recording state, so that recording can be performed quickly.

Next, the case where the reproduction-only cartridge 97 is housed in the holder 1 will be described. When the cartridge 97 is housed in the holder 1 and the holder 1 descends, the reproducing-only cartridge 97 has no chassis window formed at a portion facing the head 2 and the detecting portion 8. It contacts the upper surface of the cartridge 97. In this contact state (state shown by the solid line in FIG. 4), the head 2 is separated from the upper surface of the cartridge 97 (see FIG. 6). The reproduction is performed by the optical pickup 5 facing the shutter window 94, similarly to the recording / reproducing cartridge 92.

To eject the cartridge 92 or 97, an eject button (not shown) is operated. Then, since the movable chassis 20 moves to the rear side, the holder 1 is raised by the operation reverse to the above, and the cartridges 92 and 97 are ejected by the ejection mechanism (not shown). Then, the movable chassis 20 is held in the state shown in FIG. 1 by the locking means (not shown).

That is, according to the present example, the detection unit 8 engages with the recording window 95 of the cartridge 92 so that the head 2 automatically faces the disk 90. Therefore, the mechanism for controlling the head 2 is controlled. It is possible to eliminate the need for a motor for moving the head or the like, which is required in the conventional mechanism. Therefore, according to this example, it is possible to make the configuration simpler than the conventional mechanical mechanism for controlling the head, and to reduce the cost.

In the above-mentioned embodiment, the non-contact type head mechanism is shown, but the same can be applied to the contact type head mechanism. In this case, when the holder 1 accommodating the recording / reproducing cartridge 92 descends, the lever 3 tilts and the head 2 comes into contact with the disk 90, but the detecting section 8 and the engaging section 7 are separated by the disk 90 and the holder. It is configured to be separated from the upper surface of 1.

An example of signal processing of the disk device will be described. FIG. 7 is a block diagram relating to signal processing of the disk device.

In the figure, reference numeral 110 denotes an input terminal, and an analog audio signal is supplied to the input terminal 110. The analog audio signal from the input terminal 110 is supplied to the A / D converter 111 and converted into a digital audio signal.

The digital audio signal from the A / D converter 111 is compressed by the audio compression encoder / decoder 112, and the compressed signal passes through the shock proof memory controller 113 to the error correction code / modulation encoder / decoder 115. Supplied. The error correction code is added by the error correction code / modulation encoder / decoder 115, and the modulated signal is supplied to the head 117 via the head drive unit 116. Then, it is recorded on the disc 90 in cooperation with the laser beam from the optical pickup 121.

120 is a motor for the disk 90. The Tmax of the EFM-modulated digital reproduction signal, that is, the time length of the maximum inversion interval is constantly measured, and the rotation of the motor 120 is controlled so that the disk 90 is always rotated at a constant linear velocity.

The output from the non-contact type optical pickup 121 is amplified by the RF amplifier 122 and then supplied to the servo circuit 123 to form servo signals such as a focus error signal and a tracking error signal. Then, the respective servo signals are supplied to the optical pickup 121, the feed motor 124 for the optical pickup 121, and the motor 120.

The main signal output from the RF amplifier 122 is supplied to the error correction code / modulation encoder / decoder 115 and subjected to demodulation processing and error correction processing. The processed signal is supplied to the audio compression encoder / decoder 112 via the shock proof memory controller 113. The shock proof memory controller 113 uses the memory 114 to prevent so-called skipping.

The digital audio signal expanded by the audio compression encoder / decoder 112 is supplied to the D / A converter 126. Then, this digital audio signal is converted into an analog audio signal by the D / A converter 126 and supplied to the output terminal 127.

Reference numeral 128 denotes a system controller, which operates the input key 129 to cause the disk device to perform a predetermined operation. That is, the system controller 128 controls the operations of the shock proof memory controller 113, the error correction code / modulation encoder / decoder 115, and the servo circuit 123 based on the operation signal of the input key 129.

Further, the system controller 128 causes the display unit 130 to display the accumulated reproduction time read from the subcode, the program number, and the like.

[0050]

[Effect of device]

 According to this invention, when the cartridge is for recording / reproducing, the detecting means engages with the window of the cartridge so that the head automatically faces the disk. It can be performed instantly, and the head control mechanical mechanism does not require a motor for moving the head as in the conventional case, and the structure is simpler than that of the conventional head mechanical mechanism. By doing so, cost down can be achieved.

[Brief description of drawings]

FIG. 1 is a diagram showing a main part of an embodiment.

FIG. 2 is a diagram showing a main part of the embodiment.

FIG. 3 is a diagram showing a usage state of the embodiment.

FIG. 4 is a diagram showing a usage state of the embodiment.

FIG. 5 is a diagram showing a usage state of the embodiment.

FIG. 6 is a diagram showing a usage state of the embodiment.

FIG. 7 is a block diagram of signal processing according to the embodiment.

FIG. 8 is a diagram showing a recording / reproducing cartridge.

FIG. 9 is a diagram showing a reproduction-only cartridge.

[Explanation of symbols]

 1 Holder 2 Head 3 Lever 4 Movable Member 5 Optical Pickup 6, 22 Spring 7 Engagement Part 8 Detection Part 9 Stopper 20 Movable Chassis 30 Fixed Chassis 90 Disk 92, 97 Cartridge 94, 95 Shutter Window 96, 98 Shutter

Claims (1)

[Scope of utility model registration request] 1. A holder for accommodating, together with the cartridge, a disk to be accommodated in a reproduction-only cartridge having a reproduction window formed on one surface thereof or a recording-reproduction cartridge having recording and reproduction windows formed on both surfaces thereof. A head for recording information on the disk, and a detection means for engaging with a recording window of the cartridge arranged integrally with the head, and when the cartridge is for recording and reproduction, the detection means is the cartridge. A disk device, wherein the head is configured to face the disk by engaging with a window of the disk.