JPH02152063A - Disk changer - Google Patents

Abstract

PURPOSE:To avoid the situation that a disk is caught between a magazine and a reproducing part by taking out a prescribed disk from the magazine, where plural disks are stored, to set it to a disk reproducing part and providing an unload detecting means to unload it at the time of the end of reproducing. CONSTITUTION:One of CDs stored in a magazine 2 is taken out and is set to a reproducing part 8 of a disk player, and the CD is returned to a prescribed insertion hole 4 of the magazine 2 from the reproducing part 8 at the time of the end of reproducing. When the CD is not set to the insertion hole 4 at the time of this unloading, a disk transporting mechanism 21 is vertically shifted for a prescribed length by the output of a detecting means constituting of a timer to set the CD again, and this operation is repeated three times. When the CD cannot be set to the insertion hole 4 nevertheless, this state is displayed, and the CD is returned to the home position by operator's operation of a disk change, and the situation that the CD is caught between the magazine 2 and the reproducing part 8 is avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disc changer in which a predetermined disc is selected from a plurality of discs and the selected disc is played back in a disc playback section.

2. Description of the Related Art Recently, a disc player equipped with a disc engine mechanism, that is, a disc changer, has been put into practical use in in-vehicle audio equipment and the like.

This disc changer consists of a magazine loading section into which a magazine containing a plurality of discs is mounted, a disc playback section into which the discs are played, etc. When a magazine is installed in the magazine mounting section, a disk transfer mechanism is activated. The discs are searched by the search engine, and a predetermined disc is loaded from the magazine and carried to the disc reproducing section, where the disc is reproduced.

"Problems to be Solved by the Invention" By the way, in the conventional disc changer described above, a disc that has been played is unloaded from the disc playback unit and returned to a predetermined position in the magazine. However, during unloading, the disk may hit the edge of the magazine and not be able to enter the magazine. Moreover, in this case, there are disadvantages in that the unloading operation may be repeated many times, causing damage to the disc, or the disc may become caught between the magazine and the disc playback section, resulting in loss of control.

The present invention was made against this background, and an object thereof is to provide a disk changer that can accurately return a disk to a predetermined position within a magazine during unloading.

``Means for Solving the Problems'' This invention involves loading a given disc from a magazine in which a plurality of insertion slots for storing a plurality of discs are provided at predetermined intervals, and setting the disc in a disc playback section for playback. After that, in a disc changer that unloads a predetermined disc into a predetermined insertion slot, there is provided a detection means for detecting the end of unloading during unloading, and a detection means for detecting the end of unloading when an output signal of the detection means is not manually input within a predetermined time.
If the output signal of the detection means is not input even after performing the unloading operation a predetermined number of times after moving the predetermined disk by a predetermined pressure M so as to bring the predetermined disc closer to the predetermined insertion slot,
The present invention is characterized in that it includes a control circuit that sets a predetermined disc in the disc playback unit when an indication that unloading is disabled is displayed.

According to the present invention, when the operator of the disc changer operates a key or the like for unloading a predetermined disc, the control circuit unloads the predetermined disc into a predetermined insertion slot of the magazine. Perform a predetermined loading operation. As a result, in the normal case, a predetermined disk is inserted into a predetermined insertion slot, and the output signal of the detection means is manually inputted to the control circuit within a predetermined time. On the other hand, if the output signal of the detection means is not manually input within a predetermined time,
The control circuit performs an operation of unloading after moving a predetermined disk a predetermined distance so as to bring it closer to a predetermined insertion slot. If the output signal of the detection means is not input after performing this operation a predetermined number of times, the control circuit displays that unloading is impossible and sets a predetermined disc in the disc reproducing section.

"Embodiment" Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 and 2 are a block diagram and a perspective view, respectively, showing the structure of a disc changer and a magazine used in this disc changer according to an embodiment of the present invention. In these figures,! ,~1. is a compact disc (CD), 2 is a CD1. ~1. 3 is a partition plate installed in the magazine 2 at regular intervals, 4 is an insertion slot formed with a constant width by the partition plate 3, 5 is a bottom plate of this disc changer body, and 6 is a slot on the bottom plate 5. The fixed magazine tables 6a and 6b on which the magazine 2 is attached are guide pieces bent at both left and right edges of the magazine table 6, and serve as guides for both edges of the magazine table 6 when the magazine 2 is loaded. The lower sides of the magazine 2 are guided by the pieces 6a and 6b.

In addition, 7 is a magazine eject mechanism provided below the magazine table 6 to eject the magazine 2, and 8 is a CI
) l, to 16, is a disc playback unit that plays a predetermined CD. In the disc playback unit 8, 9 is a CD
10 is a clamper that clamps the CD, 11 is a spindle motor that rotationally drives the CI), ! 2 is an optical pickup that uses a laser beam to read digital information recorded in bits on the signal recording surface of the CI); 13 is this optical pickup 9;
A feed motor 14 generates and outputs a focus error signal and a tracking error signal from the read signal output from the optical pickup 12, and also amplifies and outputs the read signal.
It's an amplifier.

Further, 15 is a data processor that performs processing such as decoding, decoding, and correction of code errors of the signal output from the It F amplifier +4, and I6 is a data processor that converts the digital signal output from the data processor 15 into an analog audio signal. A converting DA converter 17 is an audio circuit that performs processing such as amplification and sound quality control on this audio signal, and the output signal of this audio circuit 17 is outputted to an external speaker or the like via an audio output terminal 18. . I9 is the system controller, and the CPU (central processing unit)
, l'ROM in which programs used in this CPtJ are stored, rlAM and 1 for data storage.
It consists of 10 (manpower) boats. 20 under the control of the system controller 19 performs focus adjustment control (feed servo) and tracking adjustment control (tracking servo) of the optical pickup 12 using the focus error signal, tracking error signal, etc. output from the INF amplifier 14. ) and feed motor! 3 feed adjustment control (feed servo) and spindle motor 1! This is a servo processor that performs constant linear velocity control (spindle servo).

Further, 21 is a disk transfer mechanism for loading a predetermined CD from the magazine 2 to CD I+16 into the disk playback section 8, and 22 is a magazine loading mechanism under the control of the system controller I9. - An automatic change machine groove drive unit that drives the mechanism 7 and the disk transfer groove 21; 23 is an operation panel operated by the operator to cause the disk changer to perform various functions; 24 is a control panel that displays the operating status of this disk changer; This is a display section on which error messages and the like are displayed.

Further, FIG. 3 shows the structure of the disk transfer machine M21.

In this figure, 25 is a support plate provided on the disk transport mechanism 21, 261 and 26. 27 is a guide pin provided on the support plate 8, and 27 is a guide pin 26. and 26. This is a disc ejecting member supported by the magazine 2, and ejects and mounts a predetermined CD stored in the magazine 2 by moving linearly in the direction a-r in the figure.

Furthermore, 28 is a drive device that drives the disk ejection member 27, 29 is driven by the drive device 28, and the magazine 2
The roller 29 is an upper roller that pulls in a predetermined CD from a predetermined insertion opening 4, and both ends of the roller 29 are supported by a swing lever 30.

The swing lever 30 is swingably supported around a pin 30a as a fulcrum. Further, 31 is a rotatably supported lower roller, 32 is a spring that biases the swinging lever 30 downward, and this biasing force sets a disc clamping force between the roller 29 and the roller 31. has been done. Further, a swing lever 30 is attached to the end of the roller 29.
A protrusion 29a is provided that protrudes from. On the other hand, as shown in FIG. 2, a roller regulating piece 33 is provided on the bottom plate 5, and the disc transport mechanism 21
When the protrusion 29a of the roller 29 comes into contact with the roller regulating piece 33, the swinging lever 30 rotates, and the roller 29 escapes upward relative to the descending disk transport mechanism 21, causing the pair of rollers to The disk clamping force exerted by 29 and 31 is released.

In addition, in FIG. 3, 34. ~34 holes are guide holes,
351-35. is guide hole 34. ~34. Concubine next to J-
This is a female screw hole.

In addition, in FIG. 2, 36. 363 is an elevating mechanism that drives the disk transport mechanism 21 in the vertical direction. This elevating mechanism 361-36. are all Gaidon Yaf l-3
7, ~373, lifting screw 38°~38. and this lifting screw 38. Gear 39 fixed at ~38°.
~393. And the lifting mechanism 36
．． ~3G, guide shirt 1.37. ~37. are guide holes 341 to 341 provided in the disk transport mechanism 21, respectively.
343, and the lifting screw 38. ~38. are respectively female threaded holes 35. ~35. is screwed into the

Furthermore, these elevating mechanisms 3G, to 36. Gears 39 provided in each of the gears 39. ~39. is the bottom plate 5 in Figure 2.
They are rotated in synchronization with each other by an elevation drive mechanism 40 provided on the lower surface of the . FIG. 4 shows the structure of the elevating drive mechanism 40. Incidentally, FIG. 4 is a bottom view of the disc changer. In FIG. 4, parts corresponding to those in FIG. 2 are given the same reference numerals, and their explanations will be omitted. In this figure, 41 is a synchronous drive gear,
This synchronous drive gear 41 is rotatably supported by a shaft 42. The synchronous drive gear 4I also has holes 43 bored to a predetermined diameter at 12 locations g180 degrees symmetrically around its outer circumference.
and 43. is provided.

Furthermore, the holes 43+ and 43. A sensor 44 consisting of a light emitter and a light receiver is provided at a passing position sandwiching the synchronous drive gear 4I. And holes 43 and 43
．． By passing over this sensor 44, the light emitted from the light emitter is incident on the light receiver, and the sensor 44 outputs a pulse corresponding to the diameter of the holes 431 and 43.

Further, the synchronous drive gear 41 has three shafts 45. -45, and a synchronous gear 46. which is rotatably supported by. meshes with ~465, synchronous gear 4G, ~46. gears 391-39. are intertwined with each other. On the other hand, the synchronous drive gear 41 meshes with a pinion gear 47, and the pinion gear 47 is connected to a motor 48.
It meshes with a worm gear 49 inserted into the shaft of.

Further, FIG. 5 shows a plan view of the disc changer. In this figure, parts corresponding to those in FIG. 2 are given the same reference numerals, and their explanations will be omitted.

In this figure, 50 is a CD set on the turntable 9 of the disc playback section 8, and 51 to 53 are discs 5 and 53.
These sensors are turned on when the light passes above or above 0 and blocks the light.

In such a configuration, the operation in which one system controller unloads the CD 50 set in the disk playback section 8 of FIG. 5 into a predetermined insertion slot 4 of the magazine 2 will be described based on the flowchart of FIG. 6. When the operator of this disc changer operates a key or the like for unloading the CD 50 provided on the operation panel 23, the system controller I9 first proceeds to step S1 and sets an internal unloading error timer. do. This timer is used to determine whether unloading is completed within a predetermined time. Then, proceed to step S2/>. In step S2, an operation is performed to unload the CD 50. That is,
A disk unloading command is output to the auto change mechanism drive unit 22. Auto change mechanism drive section 2
2 receives this command and drives the motor 48 of the lifting drive machine +f140 in direction 11 in the figure. As a result, the worm gear 49 rotates in the 11 direction, and the pinion gear 47 rotates in the i direction.
, rotate in the direction. Then, the synchronous drive gear 41 is driven in 13 directions. Further, the synchronous drive gear 4I includes synchronous gears 461 to 46. The gear 39. is rotated in the L+force direction i4, direction and ias direction, respectively. ~39, are driven in the is+ direction, the io force direction, and the i direction, respectively. As a result, the three lifting mechanisms 361 to 36 in FIG. each lifting screw 3B.

~383 synchronously rotate in the i□ force direction Lm direction and in the ias direction, and the disk transport mechanism 21 rises,
The CD 50 is lifted by the rollers 31 and the like. During this process, the roller 29 separates from the roller regulating piece 33, and the CD 50 is held between the rollers 29 and 31.

In this case, half a revolution of the synchronous drive gear 41 is equal to the distance that the disk transporter JM 21 moves from one insertion opening 4 of the magazine 2 to the adjacent insertion opening 4.

On the other hand, as the synchronous drive gear 41 rotates, the sensor 4
4 outputs the waveform shown in FIG.

The period to of this waveform is equal to half a rotation of the synchronous drive gear 41, that is, the moving distance from one insertion port 4 of the magazine 2 of the disk transfer mechanism 21 to the adjacent insertion port 4.

Therefore, the operation m of the disk transport mechanism 21 can be detected by the sensor 44. This detection operation allows the disk transport mechanism 21 to be opposed to the predetermined position of the insertion opening 4 of the magazine 2. As a result, the system controller I9 raises the disk transport mechanism 21 to the predetermined insertion slot 4 position of the magazine 2, detects the fall of the output signal of the sensor 44 (not shown in FIG. 7), and moves the disk transport mechanism 21 up. make it stop. Next, the auto change mechanism drive section 22 drives the drive mechanism 28 to remove the disk ejecting member 27.
is moved in the direction of e in Fig. 3. As a result, CD5
0 is moved to position a in FIG. 5, then to position b, and inserted into a predetermined insertion opening 4. Incidentally, as the CD 50 moves as described above, the sensors 51 to 53 are turned on and off as shown below. First, when the CD 50 is set in the disc playback unit 8, the sensor 5I is on and the sensor 5I is on.
2 and 53 are off. Next, when the CD 50 moves to position a, all the sensors 51 to 53 are turned on, and the
When D50 is installed in position b, that is, in the predetermined insertion port 4, all of the sensors 51 to 53 are turned off.

Next, the system controller I9 proceeds to step S3 and determines whether unloading has been completed. If the result of this judgment is rYESJ, that is, if all the sensors 51 to 53 are turned off, the series of operations ends.

On the other hand, if the determination result in step S3 is "NO", that is, if the CD 50 is not inserted into the predetermined insertion slot 4 of the magazine 2 for some reason and all the sensors 51 to 53 are not turned off, step Proceed to S4. Step S4
Then, it is determined whether the internal unloading error timer has exceeded the predetermined time period. If the result of this determination is rNOJ, the process returns to step S2. On the other hand, what about step S4? If the II cutting result is rYEsJ, the process advances to step S5. In step S5, a disk loading operation is performed. That is, a disk loading command is output to the auto change mechanism driving section 22. The auto change mechanism drive unit 22 receives this command and drives the drive mechanism 28 to release the disc ejection member 2.
7 in the direction of r in Fig. 4. Therefore, CD50
moves to a position above the disc playback section 8 in FIG.

Then, the process advances to step S6. In step S6, 1 is added to the internal unloading error counter, and the process then proceeds to step S7. In step S7, it is determined whether the value of the unloading error counter is 3 or not.

If the result of this judgment is "NO", step S
Proceed to step 8. In step S8, a position shifting operation is performed. That is, the motor 48 in FIG. 4 is moved in the opposite direction to the above case.
That is, it is driven in the g+ force direction in the figure.

As a result, the worm gear 49 rotates in the g1 direction, and the pinion gear 47 rotates in the gt force direction. Then, the synchronous drive gear 41h4g is driven in the direction. Furthermore, the synchronous drive gear 41 includes synchronous gears 461 to 46. each gm+
Direction, ga! Rotate in direction G43 and gear 3
9. ~39. are driven in the g@+ direction, gs* direction, and gss direction, respectively. As a result, the three lifting mechanisms 36 in FIG. ~36. each lifting screw 38
．． 383 rotate in the get direction, gsw direction, and gas direction, respectively, and the disk transport mechanism 21 descends. Then, the system controller I9 detects the fall of the output signal of the sensor 44 (not shown in FIG. 7), and
The lowering of the disk transport mechanism 21 is stopped. That is, the seventh
The disk transport mechanism 21 is lowered by a distance corresponding to the width t of the waveform in the figure. Then, the process returns to step S2.

On the other hand, if the determination result in step S7 is rYES J, the process advances to step S9. In step S9, the display section 2
After displaying an unloading error message in step S4, the process advances to step S10. In step S10, CD5
0 to the home position, that is, CD5
0 on the turntable 9 of the disc playback section 8, the series of operations is completed.

In this way, if the CD 50 is not inserted into the predetermined insertion slot 4 of the magazine 2 during unloading, the disk transport mechanism 21 is shifted up and down by a predetermined distance and the operation of reloading the CD 50 is repeated three times. The CD 50 can be reliably loaded into the predetermined insertion slot 4 of the magazine 2. In addition, if the CI) 50 is not inserted into the specified insertion slot 4 even after repeating the operation of shifting the disk transfer mechanism 2 three times, a message will be displayed, so the operator of this disk changer will be able to avoid this situation. can be dealt with immediately. However, in this case, since the CD 50 is returned to the home position, failures such as the CD 50 being caught between the magazine 2 and the disc playback unit 8 do not occur.

In the above description, an example was given in which the disc playback unit 8 is attached to the bottom plate 5 and the disc transport mechanism 21 always rises when unloading the CD 50.
If the disc playback unit 8 is attached to the top plate or middle part of the disc changer, this disc playback unit 8
When unloading a CD 50, the disk transport mechanism 2 may be lowered or raised depending on the position of the insertion port 3 in the magazine 2 corresponding to the CD 50 set therein.

[Effects of the Invention] As explained above, according to the present invention, there is an effect that a disk can be accurately returned to a predetermined insertion slot in a magazine during unloading. Moreover, if the disc cannot be returned to the designated insertion slot in the magazine even after repeating the unloading operation a predetermined number of times, a message to that effect will be displayed, allowing the operator of this disc changer to take immediate action to resolve the situation. The effect is that it can be done. Furthermore, in this case, since the disc is returned to the disc playback unit, there is an advantage that failures such as the disc being caught between the magazine and the disc playback unit do not occur.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the structure of a disc chain node and a magazine used in this disc changer according to an embodiment of the present invention, and FIG. 2 is a block diagram showing a disc changer according to an embodiment of the present invention and a magazine used in this disc changer. FIG. 3 is a perspective view of the disk transfer machine (1 card 21), FIG. 4 is a bottom view of the disk changer, FIG. 5 is a plan view of the disk changer, and FIG. 6 is the system controller!9. )
[l-chi (--1-1 Figure 7 is a waveform diagram of the output signal of the Senna 44. !9...System controller, 51-53...
Senna.

Claims (1)

[Claims] A predetermined disc is loaded from a magazine in which a plurality of insertion slots for storing a plurality of discs are provided at predetermined intervals, and after setting it in the disc playback section and playing it, the predetermined disc is unloaded into the predetermined insertion slot. In a loading disc changer, at the time of unloading, a detection means detects the end of the unloading, and if an output signal of the detection means is not input within a predetermined time, the predetermined disc is moved closer to the predetermined insertion slot. If the output signal of the detecting means is not input even after the unloading operation is performed a predetermined number of times after the predetermined distance has been moved as shown in FIG. A disc changer characterized by comprising a control circuit set in the part.