JPH09265715A - Disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the moving time of a reproducing and recording means and to minimize impact force to a stopper. SOLUTION: When a pickup is instructed to perform reproduction from a disk D1 positioned in a reproducible area to a surface of the other disk D2 , the pickup is immediately moved to the disk D2 at the double reproducing speed, and upon arrival of the pickup in a position P6 prior to the innermost circumferential position P7 of the other disk D2 by a prescribed distance Q2 and on the upstream side of the moving direction of the pickup, the pickup is moved at the reproducing speed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk device, and more particularly, to a disk device for reproducing at least one surface of a plurality of disks and / or recording on at least one surface of a plurality of disks. .

[0002]

2. Description of the Related Art Conventionally, a single pickup has two
Disc devices have been proposed which reproduce at least one side of one disc. In this disc device, when there is an instruction to reproduce the surface of the other disc during reproduction of the surface of the other disc, the pickup is once positioned at the innermost circumferential position of the one surface. After the pickup is located at the innermost circumferential position, the pickup is moved toward the reproducible area of another disc.

By the way, the disk device is provided with a stopper and a limit switch so as to correspond to the innermost peripheral position of the disk, and when the limit switch detects that the pickup is located at the innermost peripheral position,
Stop moving the pickup. The stopper prevents the pickup from moving further. After that, the other disc is reproduced.

[0004]

However, in the above-mentioned disc device, when there is an instruction to reproduce the surface of the other disc, the pickup is once positioned at the innermost circumferential position of the surface of one disc and then Since the pickup is moved toward the reproducible area of the other disc, the pickup is moved back and forth between the position of the pickup at the time of the above instruction and the innermost circumferential position of the surface of the one disc. It takes a long time to move, which gives the user discomfort such as frustration.

On the other hand, in order to shorten the moving time of the pickup, it is conceivable to increase the moving speed of the pickup, but if the moving speed of the pickup is increased in this way, the pickup will have a large impact force. While colliding with the stopper, a large abnormal noise is generated which gives the user discomfort.

The present invention has been made in view of the above facts, and an object thereof is to provide a disk device in which the moving time of the reproducing / recording means is short and the impact force to the stopper is suppressed to a small level.

[0007]

In order to achieve the above object, the invention according to claim 1 performs at least one of reproduction of at least one side of a plurality of discs and recording on at least one side of a plurality of discs. Reproducing / recording means, moving means for moving the reproducing / recording means, instructing means for instructing reproduction or recording of a surface of another disc which is not located in an area reproducible or recordable by the reproducing / recording means, And a control means for controlling the moving means so that the reproducing / recording means immediately moves on the surface of the other disk toward a reproducible or recordable area when instructed by.

According to a second aspect of the invention, in the first aspect of the invention, there is provided a detecting means for detecting that the reproducing / recording means is located at a predetermined reproducing or recording start position on the surfaces of the plurality of disks. Further, the control means controls the moving means so that the reproducing / recording means stops when the detecting means detects that the reproducing / recording means is located at the reproducing or recording start position. And

According to a third aspect of the present invention, in the first or second aspect of the invention, the control means controls the moving means so as to decelerate before the reproduction / recording means stops. To do.

The reproducing / recording means according to the invention of claim 1 performs at least one of reproduction on at least one surface of the plurality of disks and recording on at least one surface of the plurality of disks, and the moving means reproduces / records. Move means.

Here, when the instructing means gives an instruction to reproduce or record the surface of another disk which is not located in the area reproducible or recordable by the reproducing / recording means, the control means causes the reproducing / recording means to control the other disk. The moving means is controlled so as to immediately move the surface toward the reproducible or recordable area.

In this way, when the reproducing / recording means gives an instruction to reproduce or record the surface of another disc not located in the reproducible or recordable area, the reproducing / recording means can reproduce or record the surface of the other disc. The position of the reproducing / recording means when the instruction is given and the distance between the reproducing or recording start positions of the discs located in the reproducible or recordable area when the instruction is given, since it is immediately moved to the appropriate area. Since the reproducing / recording means does not reciprocate, the moving time of the reproducing / recording means can be shortened.

Further, when the moving means is controlled so that the reproducing / recording means immediately moves on the surface of the other disc toward the reproducible or recordable area, the reproducing / recording means starts the reproducing or recording of the other disc. It will be located in the position.

Thus, when the reproducing / recording means is located at the reproducing or recording start position of another disc, the detecting means according to the second aspect of the invention detects this, and the control means stops the reproducing / recording means. To control the moving means.

By the way, in order to further shorten the moving time of the above-mentioned reproducing / recording means, if the reproducing / recording means is moved at a speed higher than the moving speed of the reproducing / recording means at the time of reproducing and recording, it is usually used in a disk device. When the reproducing / recording means collides with the stopper provided, a large impact force is applied to the stopper.

Therefore, in the invention according to the third aspect, the control means controls the moving means so as to decelerate before the reproducing / recording means stops.

As described above, since the reproducing / recording means is decelerated before stopping, it is possible to suppress the impact force to the stopper when the reproducing / recording means collides with the stopper.

Here, the control means according to the third aspect of the invention decelerates when it is judged that the reproducing / recording means is located at a predetermined position before the reproduction or recording start position on the surface of the other disk. The moving means may be controlled as described above.

In this case, the control means judges whether or not the other disk exists based on the output of the reproducing / recording means. If the judgment is affirmative, it is judged that the other disk exists. The speed may be decelerated when the reproducing / recording unit moves a distance from which it can be determined that the predetermined position has been reached.

A motor for moving the reproducing / recording means, a transmission mechanism for transmitting the rotational force of the motor to the reproducing / recording means, the moving means according to the present invention. Auxiliary means for assisting the reproducing / recording means to move in a region between the reproducing or recording start positions of the surfaces of the plurality of disks by the rotational force transmitted by the transmission mechanism, and an applying means for applying a voltage to the motor. And may be configured. The control means may control the moving means so as to reduce the voltage applied to the applying means so as to decelerate before the reproducing / recording means stops.

A reproducing / recording means for performing at least one of reproduction of at least one surface of a plurality of disks and recording on at least one surface of a plurality of disks according to claim 4 of the present invention, and the reproduction / recording means. Moving means for moving, control means for controlling the moving means so that the reproducing / recording means moves toward a reproducible or recordable area on the surface of the other disc, and an optical means for irradiating the disc with light. And detecting the presence or absence of light reflected by the disc of the light emitted from the optical means while the reproducing / recording means is moving on the surface of the other disc toward the reproducible or recordable area, It is characterized in that the change of the presence or absence of the reflected light detects that the reproducing / recording means is located in a region other than the reproducing / recording area of any of the disks.

The reproducing / recording means detects the presence / absence of the reflected light from the disk of the light emitted from the optical means while the surface of another disk is moving toward the reproducible or recordable area. The change in the presence or absence of the reflected light detects that the reproducing / recording means is located outside the reproducing / recording area of any of the disks. Therefore, it is possible to easily confirm the position of the reproducing / recording means.

An optical means according to a fifth aspect of the present invention is the reproducing / recording means.

According to a sixth aspect of the present invention, the optical means is an optical sensor. Instructing means for instructing reproduction or recording of a surface of another disc which is not located in the area reproducible or recordable by the reproducing / recording means according to claim 7 of the present invention, and the reproducing / recording means when instructed by the instructing means. It further comprises control means for controlling the moving means so as to immediately move the surface of the other disk toward a reproducible or recordable area.

According to claim 8 of the present invention, there is further provided detection means for detecting that the reproduction / recording means is located at a predetermined reproduction or recording start position on the plurality of disk surfaces, and the control means is the detection means. The moving means is controlled so that the reproducing / recording means stops when it is detected that the reproducing / recording means is located at the reproducing or recording start position.

It should be noted that the control means determines whether or not the other disk exists, at any of the first time, the second time, and the third time, which will be described below, at the reproduction / recording means. Alternatively, the determination may be made by determining whether or not the output is output.

Here, in the first case, when the instruction is given, the detection means detects that the reproduction / recording means is not located at the reproduction or recording start position, and when the instruction is given, a reproducible or recordable area. A predetermined time required for the reproducing / recording means to move the outermost distance between the surface of the disk and the surface of the other disk after the output of the reproducing / recording means on the disk surface located at It's time to go.

In the second case, when the above-mentioned instruction is given, the detection means detects that the reproduction / recording means is located at the reproduction or recording start position, and when the above-mentioned instruction is given, the reproduction or recording means reproduces or records. There is an output of the reproducing / recording means on the disk surface located in a possible area, and
This is when a predetermined time required for the reproducing and recording means to move the distance between the outermost circumferences of the surface of the disk and the surface of the other disk has elapsed since the output of the reproducing and recording means was completed.

Further, in the third case, when the above-mentioned instruction is given, the above-mentioned detection means detects that the above-mentioned reproduction / recording means is located at the reproduction or recording start position, and when this instruction is given, the above-mentioned reproduction / recording means reproduces or records. There is no output of the reproducing / recording means on the disk surface located in the possible area, and
When a predetermined time required for the reproducing / recording unit to move the reproducing or recording start position and the distance between the outermost circumferences of the surfaces of the other disks has elapsed since the reading / writing unit was moved. is there.

The control means according to claim 9 of the present invention is characterized in that the moving means is controlled so as to decelerate before the reproducing / recording means stops.

According to a tenth aspect of the present invention, the control means is the light emitted from the optical means while the reproducing / recording means is moving on the surface of the other disk toward a reproducible or recordable area. When the presence or absence of light reflected by the disc does not change along a predetermined pattern within a predetermined time or a predetermined length, the reproducing / recording means is decelerated.

The control means according to claim 11 of the present invention is to control the light emitted from the optical means while the reproducing / recording means is moving toward the reproducible or recordable area on the surface of the other disk. The reproducing / recording means is stopped when the presence / absence of light reflected by the disc does not change along a predetermined pattern within a predetermined time or a predetermined length.

According to the disk device of the tenth or eleventh aspect, the pattern of the reflected light is, for example, "with or without reflection,
If the pattern does not reach this pattern within the specified time or specified length, it is judged that there is no target disk, or that the pickup is mechanically constrained or something abnormal occurs, and the pickup is decelerated. By doing this, it is possible to prevent the pickup from running out of control.

The control means may control the moving means so as to decelerate when the presence of the other disk is negative.

[0035]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. Fig. 1 shows a carrying component (a so-called transportable component stereo).
S is shown. As shown in FIG. 1, a disc device 10 according to the present embodiment is mounted on the top of the carrying component S, and the disc device 10 has a lid 70 for covering a pair of turntables described later. Are arranged. Further, the disk device 10 is provided with an open button 72 for opening the lid 70 at the front center of the upper surface thereof. When the lid 70 is opened by the open button 72, the pair of turntables are exposed and the disc can be placed on the pair of turntables.

Front panel 74 of carrying component S
Is a display section 76 for displaying the date and time, a numerical value of the frequency in the tuner, a disk number indicating which disk is being reproduced, a power key 78A for turning on the power of the carrying component S, a CD section, a tuner section, and Each function key (CD function key 78D) for selecting a cassette portion, a play key 78B for setting the disc device 10 in a play mode (a mode for reproducing a disc), and a play mode to a stop mode (a mode for stopping reproduction) ), A key operation portion 78 including a stop key 78C and the like, and a cassette holder 80
Cassette parts 80 in which A and 80B are arrayed on the left and right are respectively arranged.

A handle 84 is formed on the back side of the upper portion of the carrying component S, so that the user can use the handle 84.
It is possible to carry and carry the carrying component S by, for example, holding it on the shoulder.

As shown in FIGS. 2 and 3, turntables 12 and 14 are arranged on both the left and right sides of the front of the carrying component S of the chassis 11 of the disk device 10. 14 is a disk D mounted on the turntables 12 and 14.
1 and D2 are arranged so as to have a predetermined gap so that they do not interfere with each other. The turntables 12 and 14 are connected to spindle motors 13 and 15 (see FIG. 4), and these spindle motors 13 and 15 are connected to the chassis 1
1 is fixed to the lower surface.

When the lid 70 is closed,
A clamper (not shown) is arranged at a portion facing the turntables 12 and 14, and the discs D1 and D2 are sandwiched (chucked) by the clamper and the turntables 12 and 14, respectively.

A rectangular through hole 10A is formed in a portion of the chassis 11 sandwiched between the turntables 12 and 14. A pickup 16 is arranged in the through hole 10A, and an objective lens 30 for condensing light is arranged in the pickup 16.

Guide shafts 28A and 28B are arranged in the front-rear direction and above the through hole 10A. These shafts 28A and 28B are the pickup 1
6, and both ends of the shafts 28A and 28B are fixed to the chassis 11. Therefore, pickup 1
6 can slide in the left-right direction while being guided by the shafts 28A and 28B.

A sled motor 22 (shown by a broken line in FIG. 2) for moving the pickup 16 is fixed to the front lower surface of the chassis 11, and a motor gear 24 of this sled motor 22 projects to the upper surface of the chassis 11.

The motor gear 24 always meshes with the large diameter gear 26A of the relay gear 26, and the small diameter gear 26B of this relay gear 26 meshes with the large diameter gear 20A of the pinion 20. That is, the large-diameter gear 26A and the small-diameter gear 26B of the relay gear 26 are integrally formed, and the pinion 20
And the large-diameter gear 20A are integrally formed. The pinion 20 is formed on the lower surface of the large diameter gear 20A.

A rack 18 is attached to the front side of the pickup 16, and the rack 18 is always meshed with the pinion 20. As shown by an imaginary line (dotted line) in FIG. 2, when the pinion 20 rotates so as to start meshing with the left end of the rack 18 from the left end of the rack 18 to the right end of the left part, the pickup 16 is mounted on the turntable 12 side. It moves from the innermost circumferential position (playback start position) of the placed disc D2 to the outermost circumferential position. Further, as indicated by the solid line in FIG. 2, the pinion 20 from the right end of the right part of the rack 18
When the pinion 20 rotates so as to start meshing with the left end of the right portion, the pickup 16 moves from the innermost position to the outermost position of the disk D1 placed on the turntable 14 side.

As shown in FIG. 3, the turntable 12,
At the lower part of 14, there are arranged stoppers 36 and 38 for stopping the pickup 16 at the innermost peripheral position while the pickup 16 does not proceed further than the innermost peripheral position. The state where the pickup 16 collides with the stoppers 36 and 38 is shown by a dotted line.

Below the chassis 11 and below the spindle motors 13 and 15 and the sled motor 22,
A printed circuit board (not shown) is arranged. The printed circuit board has limit switches 32 and 34 for detecting that the pickup 16 is located at the innermost position of the disk D1 or D2 placed on the turntable 12 or 14.
Are fixed to both ends of the pickup 16 in the moving direction. The limit switches 32 and 34 output a detection signal when the pickup 16 contacts. As a result, it is detected that the pickup 16 is located at the innermost peripheral position. The limit switches 32 and 34 are provided for the following reason. That is, when the disc D1 or D2 placed on the turntable 12 or 14 is reproduced by the pickup 16,
Is moved from the innermost peripheral position to the outermost peripheral position and is not reproduced, the pickup 16 is used for the next reproduction.
The innermost peripheral position is set. Therefore,
Limit switches 32 and 34 are provided, and it is determined whether or not the pickup 16 is located at the innermost circumferential position of the disks D1 and D2 by determining whether or not the detection signals from the limit switches 32 and 34 are input. I am trying. An optical sensor or the like may be used instead of the limit switch.

Next, the control system of the disk device 10 will be described with reference to FIG. As shown in FIG. 4, this control system includes a pickup 16 which outputs a digital audio signal, a focus error signal, and a tracking error signal by reproducing the disks D1 and D2. The pickup 16 includes a semiconductor laser (not shown) that emits laser light toward the disks D1 and D2, a light receiving element that receives reflected light from the disk D1 or D2 via the objective lens 30, and a laser light emitted from the semiconductor laser. It is configured to include an APC circuit that controls a drive current supplied to the semiconductor laser so that the light emission amount is constant, a focus servo mechanism for focus adjustment, and a tracking servo mechanism for tracking adjustment.

The pickup 16 includes an RF amplifier 5
0 and the power amplifier 58 are connected. A control unit 56 and a signal processing system 52 are connected to the RF amplifier 50. An output terminal is connected to the signal processing system 52 via a D / A converter 54.

A polarity reversing circuit 66, a limit switch 32, a three-way switch (SW) 60, a key operation unit 78 and a power amplifier 58 are connected to the control unit 56. The power amplifier 58 is connected to the spindle motors 13 and 15 via a polarity reversing circuit 66, a thread motor 22, and a changeover switch (SW) 60.

Next, the operation of the present embodiment will be described. In the present embodiment, the power key 7 arranged in the key operation unit 78
When 8A is operated, the main power source of the carrying component S is turned on. The power is set to be turned on even when each function key (CD function key 78D) for selecting the CD unit, the tuner unit, and the cassette unit is operated.

When the play key 78B is operated once after the disk device 10 is thus powered on, a play signal is supplied to the controller 56. Based on this play signal, the control unit 56 drives the spindle motors 13 and 15 via the power amplifier 58 to rotate the disks D1 and D2 and drives the sled motor 22 to move the pickup 16.

Here, the control unit 56 controls the pickup 16
The spindle motors 13 and 15 and the sled motor 22 are controlled via the power amplifier 58 so that the linear velocity at the time of reproducing the surface of the disk D1 or D2 by the method is constant.

The controller 56 outputs the objective lens 30 and the disc D based on the focus error signal output from the pickup 16 and input via the RF amplifier 50.
The focus servo mechanism is controlled via the power amplifier 58 so that the distance to the surface 1 or D2 is kept constant.

Further, the control unit 56 passes through the power amplifier 58 so that the optical axis of the objective lens 30 follows the track based on the tracking error signal output from the pickup 16 and input through the RF amplifier 50. hand,
The spindle motors 13 and 15, the sled motor 22, and the tracking servo mechanism are further controlled.

As described above, in the disk device 10, the linear velocity when the surface of the disk D1 or D2 is reproduced by the pickup 16 becomes constant, and the distance between the objective lens 30 and the surface of the disk D1 or D2 is kept constant. While controlling the optical axis of the objective lens 30 to follow the track, the digital audio signal output from the pickup 16 is passed through the RF amplifier 50 and the analog audio signal via the signal processing system 52 and the D / A converter 54. Converted to and supplied to the output terminal.

On the other hand, for example, when the reproduction of the disc D1 is completed, the control unit 56 causes the polarity inversion circuit 66 to move the pickup 16 in the direction opposite to the moving direction at the time of the reproduction.
Control. As a result, the pickup 16 moves in the direction opposite to the moving direction during the above reproduction. After that, when the pickup 16 is positioned at the innermost position of the disc D1, it contacts the limit switch 32. When the pickup 16 contacts the limit switch 32, the limit switch 3
The detection signal output from 2 is input to the control unit 56, and the control unit 56 stops the movement of the pickup 16 and
Further controlling the polarity reversing circuit 66, the sled motor 22
The voltage applied to is switched to a polarity that enables the next reproduction by the pickup 16.

On the other hand, if the play key 78B is operated twice, it means that the reproduction of the surface of another disc which is not currently located in the reproducible area of the pickup 16 is instructed, and the control routine shown in FIG. To be executed.

That is, when the play key 78B is operated twice within a predetermined time immediately after the power is turned on, or when the play key 78B is operated again in the play mode, this routine is started, and the RF signal is output in step 102. By determining whether or not there is, it is determined whether or not reproduction is in progress.

When the surface of the disk, for example, the disk D1, is being reproduced, the focus servo circuit is turned off, and the pickup 16 is controlled so that the output of the audio signal is stopped in step 104, and step 106 is executed. Then, the voltage applied to the sled motor 22 is increased. That is, the control unit 56 is twice the voltage (2V ₀₎ thread motor voltage linear velocity during reproduction side of the disc D1 by the pickup 16 is applied to the sled motor 22 to be constant (V ₀₎ 22 applied to
It controls the power amplifier 58. As a result, the pickup 16 immediately moves on the surface of the disc D2 toward the reproducible area. The applied voltage is not limited to 2V ₀ . Alternatively, the focus servo circuit may be left on and the output may be muted.

In step 108, it is determined whether or not the reflected light is not incident on the pickup 16 depending on whether or not the focus error signal has been input. That is, as described above, when the play key 78B is operated twice,
When the surface of the disc D1 is being reproduced and the pickup 16 moves toward the reproducible area on the surface of the disc D2, the pickup 16 moves the outermost position P ₃ of the disc D1 as shown in FIG. 6A. To reach the position corresponding to. In this way, when the pickup 16 reaches the position corresponding to the outermost peripheral position P ₃ of the disc D1, the focus error signal and the tracking error signal are not input. That is, the pickup 16 is in a non-light receiving state. As a result, the control unit 56 causes the pickup 16 to move to the disc D.
It can be determined that the position corresponding to the outermost peripheral position P ₃ of 1 has been reached.

In this way, the pickup 16 does not receive light.
If it is ready, in step 110, pick up
Time T from the time when 16 goes into the non-light receiving state₁Has it passed
Determine whether or not. The time T₁Is the disk D1 and
Outermost position P of disk D2 _Three, P_FiveDistance l₀To
2V₀Voltage is applied to the sled motor 22 and picked up
This is the time required for the up 16 to move.

When the time T _{1 has} elapsed, the pickup 16
Reaches a position corresponding to the outermost peripheral position P ₃ of the disk D2, as shown in FIG. 6 (a).

Here, as shown in FIG. 6 (a), if the disk D2 is placed on the turntable 12, the pickup 16 is in a light receiving state, and as shown in FIG. 6 (b), the turntable 12 is shown. If the disc D2 is not placed on the pickup 16, the pickup 16 is in the non-light receiving state. Therefore, when the time T ₁ elapses, the pickup 16 receives light.
By determining the non-light receiving state, it is possible to determine whether or not the disk D2 is placed on the turntable 12.

Therefore, in step 112, it is judged whether or not the pickup 16 is in the light receiving state. If the pickup 16 is in the light receiving state, in step 114.
When the first seek profile control is executed and the pickup 16 is in the non-light-receiving state, the second seek profile control is executed in step 116, and this control is ended.

Here, the first seek profile control will be described. When the voltage of 2V ₀ is applied to the sled motor 22, the moving speed of the pickup 16 is, as shown in FIG. 9, the linear velocity v ₀ of 2 when reproducing the surface of the disk D1.
Double speed (2v ₀ ). If the pickup 16 continues to move at this speed 2v ₀ , a large impact force is applied to the stopper 36 when the pickup 16 collides with the stopper 36. On the other hand, the position of the pickup 16 that collides with the stopper 36 is the innermost peripheral position P ₇ of the disc D2,
The distance between the innermost peripheral position P ₇ and the outermost peripheral position P ₅ of the disc D2 is predetermined.

Therefore, in the first seek profile control, the pickup 16 is decelerated before stopping. That lowers the voltage applied to t _1, a sled motor 22 when the predetermined distance l ₂ pickup 16 to a predetermined position P ₆ of the pickup 16 radially outward of the innermost position P ₇ of disk D2 has reached V ₀ . The pickup 16
Determines whether or not the position has reached the position P ₆ as follows. That is, the distance l ₁ between the outermost peripheral position P ₅ and the position P ₆ of the disk D2 is predetermined, and the time T ₃ required for the pickup 16 to move the distance l ₁ at a speed of 2V ₀ is also predetermined. Therefore, as shown in FIG. 7, when it is determined in step 112 that the pickup 16 is in the light receiving state, t
By determining whether or not the time T ₃ has elapsed from _0, it is possible to determine whether or not the pickup 16 has reached the position P ₆ .

Thus, when the voltage is reduced to V ₀ ,
The moving speed of the pickup 16 is, as shown in FIG.
Decrease to ₀ . This can reduce the impact force on the stopper 36 when the pickup 16 collides with the stopper 36. When the pickup 16 collides with the stopper 36, the polarity of the voltage applied to the sled motor 22 is reversed for a predetermined time Δt from t ₂ . As a result, the sled motor 22 is braked, and the pickup 16 stops at time t ₃ .

When the pickup 16 stops, the pickup 16 contacts the limit switch 32, and the limit switch 32 outputs a detection signal. When this detection signal is input, the control unit 56 controls the changeover switch 60 to drive the spindle motor 15 so that the disk D2 placed on the turntable 12 rotates, and
The polarity reversing circuit 66 is controlled to supply the sled motor 22 with a drive voltage having a polarity corresponding to the reproduction direction of the disc D2.

Next, the second seek profile control will be explained.
I will tell. When executing the second seek profile control
In the turntable 12, as shown in FIG.
Since the disk D2 is not placed, as shown in FIG.
In step 112, the pickup 16 is not in the light receiving state.
When it is not judged that₀, Immediately thread mode
The voltage applied to the₀Lower to. This
The moving speed of the pickup 16 is shown in FIG.
Sea urchin v₀To a reduced speed v₀Pick up at
16 collides with the stopper 36. In addition, pickup 1
The moving speed of 6 is v ₀Therefore, the impact on the stopper 36
The force can be kept small. And pickup
When 16 collides with stopper 36, t_FiveFrom the predetermined time Δ
t, the polarity of the voltage applied to the sled motor 22 is reversed.
Let As a result, the brake is applied to the sled motor 22.
Time t₆Then, the pickup 16 stops. here
The control is performed using the predetermined time ΔT, but the predetermined time ΔT
Even if you use the distance equivalent to
Good.

On the other hand, if it is determined in step 102 that the disc is not being reproduced, the pickup 16 determines that the disc D1
Is located at the innermost peripheral position P ₂ of
A rising voltage (2V ₀ ) is applied to the sled motor 22 in a direction in which the pickup 16 moves toward the disk D2. As a result, the pickup 16 immediately moves on the surface of the disc D2 toward the reproducible area.

In step 120, a focus search is performed by determining whether or not the laser light is emitted toward the disc D1 and the reflected light from the disc D1 is received. In step 122, the pickup 16 is selected by the focus search. Determines whether or not the reflected light was received. As a result, the disc D1 turns into the turntable 14
It is possible to determine whether or not it is mounted on the. When it is determined that the reflected light is received, it can be determined that the disk D1 is placed on the turntable 14, the process proceeds to step 108, and the above-described processing (steps 108 to 116) is executed.

On the other hand, when it is determined that the reflected light is not received by the focus search, it can be determined that the disk D1 is not mounted on the turntable 14, and in step 124, the reflected light is not received by the focus search. It is determined whether or not the time T _{2 has} elapsed from the time when it is determined that it has been determined. Time T ₂ are, the distance between the outermost position P ₅ of the innermost position P ₂ and the disc D ₂ of the disk D1, the pickup 16 is the time required to move at the speed 2V _0.

When the time T _{2 has} elapsed, the pickup 16
Reaches a position corresponding to the outermost peripheral position P ₃ of the disk D2, the process proceeds to step 112 and the above processing (steps 112 to 116) is executed.

As described above, in the present embodiment, when the reproduction of the surface of another disc which is not currently located in the reproduction area of the disc is instructed, the pickup is moved to the reproduction area of the surface of the other disc. Since the pickup is moved immediately, it is better to move the pickup rather than returning it to the innermost position of the disc that is currently in the playable area and then moving to the surface playable area of another disc. The time required can be shortened. Since the time required to move the pickup can be shortened in this way, the user's waiting time before the start of playback of another disc surface can be shortened, and the user's discomfort (frustration) can be reduced. You can

Further, in the above-described embodiment, since the pickup is decelerated before stopping, the impact force on the stopper when the pickup collides with the stopper can be suppressed to a small level, and the pickup can be stopped by the stopper. It is possible to suppress the abnormal noise generated when the vehicle collides with.

In the embodiment described above, the presence of another disc is detected based on the light receiving state of the pickup, but the present invention is not limited to this, and the pickup may be used for another disc. It may move immediately to the reproducible area of the surface of the disc and slow down before the pickup stops regardless of the presence of other discs. That is, as shown in FIGS. 6A and 11, when it is not determined that the reproduction is being performed, the time is from T ₀ to T ₆ (the time required for the pickup 16 to move from the position P ₂ to the position P ₆ ). The voltage is lowered to V ₀ when the time elapses and the impact force on the stopper 36 when the pickup 16 collides with the stopper 36 is reduced, and
When the pickup 16 collides with the stopper 36, the polarity of the voltage applied to the sled motor 22 is reversed for a predetermined time Δt from t ₁₁ , and the sled motor 22 is braked. As a result, the pickup 16 stops at time t ₁₂ .

Although an example in which the pickup 16 is detected to be located at the end portion of the disk is detected based on the light receiving state of the pickup 16, an optical sensor is arranged in the pickup or the like, The same operation can be performed by utilizing the presence or absence of reflected light. Also,
As shown in FIG. 6A, it is detected that the pickup has passed a predetermined position, for example, a central position P ₄ between the outermost peripheral positions P ₃ and P ₅ of the disks D1 and D2. An optical sensor is further provided, and the control routine shown in FIG. 12 is executed. Since this routine has the same acting parts as the control routine shown in FIG. 5, the same acting parts are designated by the same reference numerals, and the description thereof will be omitted. Only different parts will be explained. That is, steps 102 to 106
After executing the process of step 1 or after executing the process of step 118 when the determination in step 102 is negative, it is determined in step 132 that the optical sensor has detected that the pickup has passed the central position P _4. If it is determined by the optical sensor that the pickup has passed the central position P ₄ , the seek profile control is executed in step 134. That is, as shown in FIG. 13, in step 132, when the optical sensor detects that the pickup has passed the central position P ₄ , the time T ₀ to the time T 4 elapses.
_{When 5} (the time required for the pickup 16 to move from the position P ₄ to the position P ₆ ) has elapsed, the voltage is lowered to V ₀ , and the impact force on the stopper 36 when the pickup 16 collides with the stopper 36 is reduced. When the pickup 16 collides with the stopper 36, the polarity of the voltage applied to the sled motor 22 is reversed for a predetermined time Δt from t ₈ and the sled motor 22 is braked. As a result, the pickup 16 stops at time t ₉ .

Further, in the above-described embodiments and modifications, when there is an instruction to reproduce another disc, the pickup is controlled to stop at the innermost peripheral position of the other disc. Is not limited to this, and at the time of instructing the reproduction of another disc, an instruction to reproduce a predetermined track (for example, the fifth song) of the other disc should also be instructed. After stopping the pickup at the inner circumferential position, the pickup may be controlled to be located at the designated track position, directly without stopping the pickup at the innermost circumferential position of another disc. The pickup may be controlled to be located at the designated track position. In addition, the information of the track of the disc (information of which track is at which position) is recorded on the top track of the innermost circumference of the disc, and the pickup is directly positioned at the designated track position. In order to do so, the information of this track is read in advance, and the pickup is directly positioned at the position of the specified track based on the read information of the track.

Further, in the above-described embodiment and modification, an example in which disks of the same size are placed on a pair of turntables has been described, but the present invention is not limited to this, and different disks may be used. It can also be applied when placed.

Further, in the above-mentioned embodiments and modifications, the disc on which music is recorded has been described as an example. However, the present invention is not limited to this, and a disc on which information other than music is recorded ( It is also applicable to the case of so-called CD-ROM).

In addition, in the above-described embodiments and modifications, the optical pickup is used as an example for explanation. However, the present invention is not limited to this, and a pickup other than an optical pickup is used. The formula can be similarly applied. In this case, the same can be applied to the case of recording data on the surface of the disc.

Furthermore, in the above-described embodiments and modifications, the example in which a pair of turntables for mounting the disks is provided has been described, but the present invention is not limited to this, and the turntable is not limited to this. It can also be applied to the case where two or more are provided.

In the above-described embodiment and modification, the play key 78B is operated twice to instruct the reproduction of another disk surface, but the present invention is not limited to this. Instead of a play key, a dedicated key for instructing may be provided,
A key for instructing the instruction may be provided on the remote controller.

[0084]

As described above, the present invention has the effect that the moving time of the reproducing / recording means can be shortened, so that the user's discomfort can be suppressed to a small level.

Further, since the impact force on the stopper when the reproducing / recording means collides with the stopper can be suppressed to a small level, the amount of abnormal noise generated when the reproducing / recording means collides with the stopper can be reduced. Therefore, the user's discomfort can be reduced.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a carrying component S.

FIG. 2 is a plan view showing a main part of the disk device according to the embodiment of the present invention.

FIG. 3 is a cross-sectional view showing the main parts of the disk device of the present embodiment.

FIG. 4 is a block diagram of a control system of the disk device of the present embodiment.

FIG. 5 is a flowchart showing a control routine of the disk device of the present embodiment.

FIG. 6 is an explanatory diagram showing a light receiving state and a non-light receiving state of a pickup when a disc is placed on a pair of turntables and when it is not placed.

FIG. 7 is a diagram showing a first seek profile control.

FIG. 8 is a diagram showing a second seek profile control.

FIG. 9 is a time-series diagram showing the moving speed of the pickup under the first seek profile control.

FIG. 10 is a time-series diagram showing the moving speed of the pickup under the second seek profile control.

FIG. 11 is a diagram showing seek profile control of a modified example of the present embodiment.

FIG. 12 is a flowchart showing a control routine of still another modified example of the present embodiment.

FIG. 13 is a diagram showing the seek profile control of step 134 of the control routine of still another modification example of the present embodiment.

[Explanation of symbols]

 16 Pickup (reproducing / recording means) 22 Thread motor (moving means) 20A Large diameter gear (moving means) 24 Motor gear (moving means) 26 Relay gear (moving means) 20 Pinion (moving means) 18 Rack (moving means) 28A, 28B Shaft (moving means) 78 Operation part (instructing means) 56 Control part (control means) 66 Polarity inversion circuit (control means) 34, 36 Limit switch (detection means)

Claims (11)

[Claims] 1. A reproducing / recording means for performing at least one of reproduction of at least one surface of a plurality of disks and recording on at least one surface of a plurality of disks, and moving means for moving the reproduction / recording means. Instructing means for instructing reproduction or recording of the surface of another disc that is not located in the area reproducible or recordable by the reproducing / recording means, and the reproducing / recording means is the surface of the other disc when instructed by the instructing means. And a control means for controlling the moving means so as to immediately move to a reproducible or recordable area. 2. A detection means for detecting that the reproduction / recording means is located at a predetermined reproduction or recording start position on the surfaces of the plurality of discs, and the control means causes the reproduction to be performed by the detection means. 2. The disk device according to claim 1, wherein the moving means is controlled so that the reproducing / recording means stops when it is detected that the recording means is located at the reproduction or recording start position. 3. The disk device according to claim 2, wherein the control means controls the moving means so as to decelerate before the reproduction / recording means stops. 4. A reproducing / recording means for performing at least one of reproduction of at least one surface of a plurality of disks and recording on at least one surface of a plurality of disks, and moving means for moving the reproduction / recording means. The reproducing / recording means includes a control means for controlling the moving means so as to move the surface of the other disc toward a reproducible or recordable area, and an optical means for irradiating the disc with light. The presence / absence of this reflected light is detected by detecting the presence / absence of the reflected light from the disc of the light emitted from the optical means while the means is moving on the surface of the other disc toward the reproducible or recordable area. A disc device, which detects that the reproducing / recording means is located outside a reproducing / recording area of any one of the discs due to a change. 5. The disk device according to claim 4, wherein the optical unit is the reproducing / recording unit. 6. The disk device according to claim 4, wherein the optical means is an optical sensor. 7. An instructing means for instructing reproduction or recording of a surface of another disc which is not located in an area reproducible or recordable by the reproducing / recording means, and the reproducing / recording means is provided when the instructing means instructs the reproducing / recording means. 7. The disk device according to claim 4, further comprising a control means for controlling the moving means so as to immediately move the surface of another disk toward a reproducible or recordable area. 8. A detection means for detecting that the reproduction / recording means is located at a predetermined reproduction or recording start position on the plurality of disk surfaces, and the control means is configured to perform the reproduction / recording by the detection means. 8. The disk device according to claim 7, wherein the moving means is controlled so that the reproducing / recording means stops when it is detected that the means is located at the reproduction or recording start position. 9. The disk apparatus according to claim 7, wherein the control means controls the moving means so as to decelerate before the reproduction / recording means stops. 10. The control means reflects the light emitted from the optical means by the disc while the reproducing / recording means is moving on the surface of the other disc toward a reproducible or recordable area. 8. The disk device according to claim 7, wherein the reproducing / recording means is decelerated when the presence or absence of light does not change along a predetermined pattern within a predetermined time or a predetermined length. 11. The control means reflects the light emitted from the optical means by the disc while the reproducing / recording means is moving on the surface of the other disc toward a reproducible or recordable area. 8. The disk device according to claim 7, wherein the reproducing / recording means is stopped when the presence or absence of light does not change along a predetermined pattern within a predetermined time or a predetermined length.