JPH0316129Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a disc autochanger device suitable for, for example, a CD (optical compact disc). [Technical background of the invention and its problems] Recently, in the field of audio equipment, DAD (Digital Audio Disk) using PCM (Pulse Code Modulation) technology has been developed in order to achieve as high fidelity reproduction as possible. ) playback devices have been developed, and among them, those based on the CD system are rapidly becoming popular. In other words, this CD method has a diameter of 12 cm.
A 1.2 mm thick transparent resin disk is covered with a metal thin film that forms pits (irregularities that provide different light reflectance depending on "1" or "2") corresponding to digital (PCM) data. The disk is rotated at a variable rotational speed of approximately 500 to 200 rpm using the CLV (constant linear velocity) method, and is rotated from the inner circumferential side to the outer circumferential side using an optical pickup containing a semiconductor laser and a photoelectric conversion element. The data is reproduced using a linear tracking method. In this case, a CD stores a huge amount of information, enabling approximately one hour of stereo playback on one side, and has a higher recording density than conventional analog discs in terms of playback characteristics. It has been established in principle that it can be made significantly superior in terms of points as well. By the way, as a way to utilize the excellent features of such CDs, for example, it is being considered that they can be used as multi-disk automatic performance devices for professional use. In other words, this corresponds to the so-called joke box or karaoke machine that is also in practical use with analog disks.
This can be realized by a disk automatic changer device. However, this type of disk autochanger device, which has been known in the past, is designed for analog disks and has a complex structure and large size.
There were problems with operability. Furthermore, due to the need for reliable operation, the number of disks that can be stored cannot be increased that much, and the speed of replacing disks cannot be made that fast either. Therefore, there are many problems in applying the conventional disk auto-changer device for CDs as described above, and it is urgent to develop a disk auto-changer device suitable for CDs. It was considered to be an issue. The same situation applies to optical disk file systems that have recently been put into practical use as part of the so-called electronic file system. By the way, in this type of disk autochanger device, it is possible to easily load and replace a large number of disks stored in a tray, and
Accordingly, consideration must be given to ensuring that the tray and the disk can always be accurately positioned with respect to the main body of the apparatus. [Purpose of the invention] Therefore, this invention was made in view of the above points, and it not only simplifies the loading and replacement of a large number of disks stored in a tray, but also makes it easier to load and replace a large number of disks stored in a tray. It is an object of the present invention to provide an extremely good disk automatic changer device that can always be accurately positioned with respect to a main body. [Summary of the invention] That is, the disk auto-changer device according to this invention is a disk auto-changer device that can automatically select a predetermined disk from a tray containing a large number of disks and supply it to a disk reproducing unit for exchange. The tray is characterized in that it has a position regulating portion and is detachably provided with respect to the apparatus main body. [Example of the invention] Hereinafter, as an example of this invention, when applied to a multi-disc automatic performance device for CD,
This will be explained in detail with reference to the drawings. Figures 1 and 2 show the disk autochanger device removed from a cabinet (not shown), and it is installed between the main chassis 11, the side plates 12, 13 at both left and right ends, and the top plate 14 in the relationships described below. Tray section 100 , tray drive mechanism section 150 , disk selection mechanism section 200 ,
First loading mechanism section 300 , second loading mechanism section 400 , disk pocket mechanism section 5
00, a disk pocket control mechanism section 550 , a disk playback mechanism section 580 , a disk temporary standby mechanism section 600, and an unloading mechanism section 700 . Here, before moving on to the explanation of the above-mentioned parts, we will explain their conceptual aspects together with the front view, plan view, and left side view of Fig. 1 shown in Figs. 3 to 5, and the conceptual diagram shown in Fig. 6. Describe the configuration and functionality. A tray section 10 in which a predetermined number of disks 101 are stored vertically in the depth direction.
Based on the disk access information, the tray drive mechanism unit 150 drives the target disk in the direction of the arrow in the figure to move the target disk to a predetermined position. The tray section 1 is selected by the disk selection mechanism section 200 .
00 is accurately positioned, and at the same time, only one disk 101 at the predetermined position is pushed up about 5 mm from the stored position to the selected position within the tray section 100 . The selected disk 101 is transferred from the tray section 100 to the loading path by the first loading mechanism section 300 , and then sent to the carry-in position (IN) in the disk pocket mechanism section 500 by the second loading mechanism section 400 . The disk pocket control mechanism section 550 rotates the disk pocket mechanism section 500 forward to bring the disk 101 to the playback position (PLAY), and then the disk playback mechanism section 580 causes the disk playback mechanism 580 to play the disk. The disk pocket control mechanism section 550 rotates the disk pocket mechanism section 500 backward to bring the disk 101 to the unloading position (OUT).
Subsequently, the disk is delivered to a position within the disk temporary standby mechanism section 600 where it can be unloaded. , , the next disk to be played is selected based on the next disk access information.
01 is carried out from the tray section 100 and carried into the disk pocket mechanism section 500 , and then brought into a reproducing state by the same procedure as described above. While the next disc 101 is being played, the previously played disc 101 fed into the temporary standby mechanism section 600 is transferred to a predetermined position on the tray section 100 by the unloading mechanism section 700 . Repeat the same steps again. During this time, a disk external loading/unloading mechanism section 800 is provided which can carry out the disk 101 after the performance is finished or carry in the disk 101 to be played from the outside if necessary. Further, in FIG. 6, 900 is an operation section,
Based on various operation command signals (for example, disk access signals, etc.) from the operation section 900, each section is sequentially controlled by a control circuit 910 so as to have a predetermined time sequence, for example. Similarly, 920 is a display unit that provides necessary displays associated with each of the above operations. The overall feature of a disk autochanger device as described above is that it has the structure and function of each part described above, so it can store disks in as little space as possible. It is possible to increase the number of disks, contribute to an improvement in the disk exchange speed, and satisfy the requirement of reliable operation. Next, details of each of the above parts will be explained in order. FIG. 7 shows a tray section 10 containing the main parts of the present invention.
0 shows an exploded perspective view of the tray drive mechanism section 150 , in which the tray section 100 has a tray main body 1 having a large number of storage grooves 102 in the shape of approximately 1/4 semicircle.
03, and each lever 104-1, 104-2 at the lower front edge of the tray body 103 as described later.
A push-up lever mechanism 106 shaped like a piano keyboard is supported by a common shaft 105 on a receiving part 121 in a state in which the ... are rotatable independently of each other, and a push-up lever mechanism 106 is attached to the back surface of the tray main body 103 with screws 107. and a positioning member 110 attached by a screw 109 so as to sandwich the push-up lever mechanism 106 at the lower part of the tray body 103. Here, the positioning member 110 has a pair of engagement protrusions 111 and 112 formed at both ends thereof in the depth direction, and the pair of protrusions 111 and 112 are connected to a carry 151 of a tray drive mechanism section 150 , which will be described later. By inserting and engaging the tray part 100 into the pair of formed engagement recesses 152 and 153, the tray part 100 can be freely attached to and removed from the tray drive mechanism part 150 while being accurately positioned. It is made possible. However, in order to prevent the tray section 100 from unintentionally rattling or coming off, it is normally fixed to the carry 151 with the positioning member 110 sandwiched between the front end of the tray body 103 by screws 120. Further, the positioning member 110 has a plurality of positioning guide holes 123-1, 123-2 formed in the skirt portion 122 below the side edge thereof at pitches corresponding to the pitches of the respective grooves 102 of the tray main body 103. has been done. The tray drive mechanism section 150 has a pair of holders 154 and 1 near the left end of the main chassis 11.
a guide shaft 156 supported by a guide shaft 155; a bearing holder 158 supported slidably in the direction of the arrow via a linear bearing 157 with respect to the guide shaft 156; A front U-shaped guide rail 159 supported by the main chassis 11 with an interval of , and this guide rail 159 and the bearing holder 158
A tray carrier section 1 consisting of the above-mentioned carry 151, one of which is directly attached between the two and the other of which is slidable in the direction of the arrow via a roller 160.
61, and a carrier drive section 162 for driving this tray carrier section 161. Here, the carrier drive unit 162 includes a linear body 165 such as a stainless steel wire attached to both ends of the carrier 151 via fasteners 163 and 164;
Four intermediate pulleys 166, 16 support the linear body 165 so as to be slidable in the direction of the arrow, forming a loop.
7, 168, 169, a pulley gear 170 around which one side of the filament 165 is wound several times, and a worm gear 171 meshed with this pulley gear 170.
And the motor 1 that drives this worm gear 171
72 and a tension arm mechanism 173 that applies a certain tension to the filamentary body 165. In FIG. 7, a light reflection sensor section 174 (described later) on the access surface is attached to the inside of the side plate 12 via a mounting plate 175. Figure 8 a, b, and c are the tray main body 1 in the above
The sectional front view, front view, and left side view showing the details of 03, in which the radius of curvature R ₁ that is compatible with the disk 101 to be stored is the valley, and the radius of curvature R ₂ smaller than R ₁ is the peak. A large number of approximately 1/4 semicircular storage grooves 102 (50 in the illustrated case) are arranged at a predetermined pitch in the depth direction (1.2 mm thick in the illustrated case).
3mm for CD, but the valley width is 1.3 and the peak width is 2.2
The front edge portion 113 is formed continuously with a shape that widens towards the end of mm, and is connected to the extension line of R ₁ and R ₂ described above, and is a portion slightly higher than the lowest portion A of the groove 102. A parallel guide groove 114 is also formed in the same shape as the groove 102 described above. In addition, the storage groove 10 formed in the tray body 103
2 and the guide groove 114, there is a bag-shaped notch, and the tips of the levers 104-1, 104-2, . . . of the push-up lever mechanism 106 described above are inserted into the notch 124. In this case, each lever 104 as shown in FIG.
-1, the storage groove 1 mentioned above also at the tip of 104-2.
By forming the push-up grooves 115 having valleys and peaks with predetermined radii of curvature R ₁ and R ₂ corresponding to 02, the push-up lever mechanism 106 can be rotated with respect to the tray body 103 as described above. When supported movably, the grooves 102 and 115 of both appear to be connected with predetermined radii of curvature R ₁ and R ₂ , and the guide grooves 115 of the former appear to be connected to the push-up groove 115 of the latter. It appears that the grooves 114 are continuous (see FIG. 14). Note that the tip of the guide groove 114 is such that when the disk 101 is returned, which will be described later, the disk 101 is placed in the guide groove 114.
It is assumed that it has a predetermined opening angle and widens toward the end so that it can be easily inserted. In addition, a guide portion 116 that enters the storage groove 102 of the tray body 103 is formed at the tip end of each lever 104-1, 104-2, so that the disk pushing operation when selecting the disk 101, which will be described later, is facilitated. It shall be ensured that this can be done smoothly. FIG. 9 shows details of the light reflection sensor section 174 described above, in which a plurality of sensors S ₁ to _{S 8} are arranged vertically at a predetermined pitch on a printed wiring board 176 attached to the inside of a mounting plate 175. The sensors S ₁ to _{S 8} are electrically connected to each other, and their positions are regulated by holders 177 having a plurality of holding holes H ₁ to _{H 8} that hold their heads correspondingly. Retained. In this case, the holder 177 has slits SL 1 _to SL ₈ formed in front of the holding holes H ₁ to _{H 8} as shown in FIG. 10, but the upper two slits SL ₁ and SL ₂
The width of the slit is 0.5mm, and the width of other slits SL ₃ ~
It is narrowed to half the width of SL ₈ (1mm). Note that these slits SL ₁ to _{SL 8} are connected to each sensor S ₁
〜S ₈ , each sensor S ₁ exists in a substantially semicircular shape, as shown in FIG. 11.
~ _S8 light emitting part (LED) and light receiving part (P/T)
It is formed in such a way that it faces each other. The outputs of the two upper sensors S ₁ and S ₂ are for positioning, and are connected in a differential configuration as shown in FIG. 12. That is, by adding the respective outputs of these two sensors S ₁ and S ₂ to the positive and negative phase input terminals + and - of the operational amplifier OP, the error signal output from the operational amplifier OP is used to drive the motor of the tray drive unit 162 described above. 172. Further, sensors S ₃ to _{S 8} other than those mentioned above are for reading addresses. Figure 13 shows the reflector plate 1 for access in the above
08, the upper two reflection patterns P ₁ and P ₂ are for positioning, and both overlap by 0.25 mm in correspondence to each storage groove 102 of the tray body 103 mentioned above. In this case, 50 pieces are formed for both. Also, in Fig. 13, other reflection patterns P ₃
~ _P8 is each storage groove 1 of the tray body 103 mentioned above.
Addresses 1 to 50 corresponding to 02 are formed in binary notation. That is, the above-mentioned light reflection sensor section 174 applies reflection patterns P 3 to P that give addresses of 1 to 50 with sensors S ₃ to _{S 8} to the above-described reflection plate 108 attached to the back surface of the tray body ₁₀₃ . After reading ₈ and moving the tray unit 100 via the tray drive mechanism unit 150 to a predetermined access position, the sensors S ₁ and S ₂ move the tray unit 100 to a predetermined access position by 0.25 (±0.125) mm.
It is designed to enable accurate positioning with an accuracy of . FIG. 14 shows a state in which the tray section 100 described above is assembled into the tray drive mechanism section 150 , and the disk selection mechanism section 200 is also shown. However, for convenience of illustration, only one disk 101 is shown in the tray section 100 at a predetermined position to be accessed (the position where the sensors S ₁ to S ₈ are arranged). Here, in the disk selection mechanism section 200 , the tray section 100 is connected to the tray drive mechanism section 150 as described above.
The motor 201 is brought into a driving state after being brought into a predetermined access position by the motor 20.
1 has a positioning shaft section 203 and a disk push-up lever section 204 that are driven via a transmission mechanism 202 which will be described later. FIGS. 15a, b, and c show the disk selection mechanism section 20.
0, when the motor 201 is driven, the pinion gear 220 fixed to the output shaft of the motor 201 rotates counterclockwise in the figure. As a result, the cam gear 207 is
clockwise rotation is transmitted to. In this case, the cam gear 207 is connected to the first to third cam portions 20 as shown separately in d, e, and f of the same figure.
8,209,210. Of these, the third cam portion 210 contacts the bent portion 212 formed on the mounting plate 211 of the disk selection mechanism portion 200 , thereby causing the cam gear 20
This is to restrict the rotation angle of the rotation angle 7, and is designed to prevent rotation in the counterclockwise direction. Then, due to the clockwise rotation of the cam gear 207, the first cam portion 208 first moves the shaft pushing lever 21.
3 is rotated around a support shaft 214 so that its tip presses the rear end of a positioning shaft 215. This positioning shaft 215 is pressed toward the shaft pushing lever 213 by a spring 216 and a retaining ring 217 provided on the positioning shaft 215. As a result, the shaft pushing lever 213 is rotated by the first cam portion 208, and the positioning shaft 21 is rotated.
5 is pushed out in the direction of the arrow, the tapered tip of the tip is pushed out into the corresponding guide hole 1 formed in the positioning member 110 of the tray section 100 described above.
I will be entering the 23rd year. As a result, the above-mentioned access position accuracy of the tray section 100 is made higher than the ±0.125 mm obtained by the light reflection sensor section 174, and the fitting clearance between the guide hole 123 and the positioning shaft 215 is 0.01 to 0.03. It will be possible to make it within mm. In this case, by making the force for pushing out the positioning shaft 215 considerably strong, it is possible to overcome the frictional force of the tray drive mechanism section 150 and correct the position of the tray section 100 . Then, when the cam gear 207 rotates further,
The second cam portion 209 presses the lever 218 to rotate the lever 218 counterclockwise. Here, the disk selection mechanism section 200 is arranged in such a position that the tip of the lever 218 can engage with the base end of each lever 104 of the push-up lever mechanism 106 incorporated into the tray section 100 described above. There is. This causes the lever 218 to move as shown in FIGS.
Then, as shown in FIG. 17, the accessed lever 104 at the predetermined position is rotated clockwise in the figure, so that only the target disk stored in the push-up groove 115 of the lever 104 is removed from the position indicated by the chain line in the figure. This means that it can be pushed up about 5 mm to the position indicated by the solid line, and only the target disk accessed here can be selected. In addition, the actual selection completion state is cam gear 207.
is rotated further and the third cam portion 210 comes into contact with the bent portion 212 as shown in FIG. 16e. Then, the disk selection mechanism section 200 as described above
This function also functions as a disk selection operation and a locking operation of the tray section 100 . Moreover, if the motor 201 is driven clockwise after this operation, it goes without saying that the original state can be restored through the reverse procedure described above. [Effect of the invention] Therefore, as detailed above, according to the invention,
Since the tray that stores a plurality of disks is detachably attached to the main body of the device via a pair of engaging parts, it is possible to easily load and replace a large number of disks stored in the tray. As a result, it is possible to provide an extremely good disk autochanger device in which the disk can always be accurately positioned with respect to the main body of the device.

[Brief explanation of the drawing]

1 and 2 are perspective views and cutaway perspective views of essential parts of an embodiment of the disc autochanger device according to this invention, and FIGS. 3 to 6 are
7 is an exploded perspective view showing details of the tray section and tray drive mechanism shown in FIG. 1, and FIG. 8 is a detail of the tray body shown in FIG. 7. 9 is a sectional view showing the details of the light reflection sensor section in FIG. 7, FIG. 10 is a view showing the slit shape of the holder in FIG. 9, and FIG. A diagram showing the relationship with the slit,
FIG. 12 is a diagram showing the electrical connection of the sensor in FIG. 9, FIG. 13 is a diagram showing details of the reflector in FIG. 7,
FIG. 14 is a perspective view showing the state after the assembly shown in FIG. 7, and FIGS. 15 to 17 are views showing details of the disk selection mechanism shown in FIG. 1 and its operating state. 11...Main chassis, 12, 13...Side plate, 14...Top plate, 100 ...Tray portion, 150
...Tray drive mechanism section, 200 ...Disk selection mechanism section, 300 ...First loading mechanism section,
400...second loading mechanism section, 500 ...
... Disc pocket mechanism section, 550 ... Disc pocket control mechanism section, 580 ... Disc playback mechanism section, 600 ... Disc temporary standby mechanism section, 70
0... Unloading mechanism section, 101... Disk, 800 ... Disk external loading/unloading mechanism section,
900...Operation unit, 910...Control circuit, 920...Display unit, 102...Storage groove, 10
3...Tray body, 104...Lever, 105...
... Common shaft, 121 ... Receiving portion, 106 ... Push-up lever mechanism, 107 ... Screw, 108 ... Reflection plate, 110 ... Positioning member, 111, 112 ...
... Convex part, 151... Carry, 152, 153...
... recess, 120 ... screw, 122 ... skirt part, 123 ... guide hole, 154, 155 ... holder, 156 ... guide shaft, 157 ... linear bearing, 158 ... bearing holder, 159 ...
Guide rail, 160...Roller, 161...Tray carrier section, 162...Carrier drive section, 1
63,164...stopper, 165...striatum, 1
66-169... Intermediate pulley, 170... Pulley gear, 171... Worm gear, 172... Motor, 173... Tension arm mechanism, 174...
...Light reflection sensor section, 175...Mounting plate, 113...
...Front edge, 114...Guide groove, 124...Notch, 115...Groove, 116...Guide portion, 176
...Printed wiring board, S ₁ to S ₈ ... Sensor, H ₁ to _{H 8} ...
...Holding hole, 177...Holder, SL ₁ to _{SL 8} ...
Slit, LED... light emitting part, PT... light receiving part,
OP...Operation amplifier, _P1 to _P8 ...Reflection pattern,
201...Motor, 202...Transmission mechanism, 203
...Positioning shaft part, 204...Disc push-up lever part, 220...Pinion gear, 205, 20
6...Reduction gear, 207...Cam gear, 208~
210...Cam part, 211...Mounting plate, 212...
...Bending portion, 213... Axial push lever, 214...
Support shaft, 215...positioning shaft, 216...spring, 217...retaining ring, 218...lever.

Claims (1)

[Claims for Utility Model Registration] Tray body 103 in which a plurality of disk storage grooves 102 for separately storing a plurality of disks are connected.
a positioning member 110 having a pair of engaging portions 111 and 112 respectively provided at substantially both ends of the disk storage groove 102 in the connecting direction in the tray body 103; and the disk storage groove 102 in the tray body 103. a pair of locking portions 15 that lock the pair of engaging portions 111 and 112 of the positioning member 110;
2,153, and the tray main body 103 is provided with the positioning member 11.
1. A disk automatic changer device characterized in that the disk autochanger device is detachably supported in a position-controlled state by engagement between the drive wheel 151 and the carry 151.