JPH0982016A - Recording medium detection device and disk device having the detection device - Google Patents

Abstract

(57) Abstract: Since detection of whether or not a recording medium is stored in a recording medium storage portion is performed by a focus operation by an optical pickup, information such as a musical tone signal recorded on a desired recording medium is obtained. It took a long time to reproduce the signal. A light emitting unit that emits light toward any one of a plurality of disc-shaped recording media stored in a plurality of recording medium storage units, and a light receiving unit that receives the light. And an optical sensor having. The optical axis between the light emitting portion and the light receiving portion of the optical sensor is arranged so as to intersect the plane of the recording medium.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to the reproduction and / or reproduction of information.
Alternatively, a recording medium detection device that detects a disc-shaped recording medium such as a recordable optical disc or a magneto-optical disc by an optical sensor having a light emitting portion and a light receiving portion, and a CD player or the like equipped with the recording medium detection device The present invention relates to a disk device.

[0002]

2. Description of the Related Art Conventionally, generally, a plurality of disc-shaped recording media, for example, 100 reproduction-only optical discs are housed, and an optical disc of a desired choice is selected to reproduce an information signal such as a recorded tone signal. A disc device such as a CD player is provided. This disk device includes a disk storage device for vertically storing 100 optical disks, a disk transfer mechanism for selectively taking out and transferring one of the optical disks stored in the disk storage device, and this disk transfer mechanism. And a disc reproducing mechanism that reproduces the information signal recorded on the optical disc carried by.

The disc storage device of this disc device is
It is provided with a rotary table provided with 100 disk storage units for individually storing 100 optical disks, a table drive mechanism for rotating the rotary table, and the like. The 100 disc storage units provided in the rotary table are arranged radially around the axis of the rotation center of the rotary table. By storing one optical disc in each disc storage unit,
The optical discs are arranged in a donut shape as a whole.

A disc transport mechanism for selectively taking out and transporting one of the optical discs housed in the disc housing portion has a first arm for supporting the optical disc from below and pushing it upward, and this first arm. Second movement of the optical disc to the disc reproduction mechanism side while holding it in cooperation with the arm
And an optical disc guide for guiding the optical discs conveyed by the first and second arms to the loading position of the disc reproducing mechanism.

The optical disk carried by the disk carrying mechanism is chucked by the disk table and the chucking plate of the disk reproducing mechanism. This disc reproducing mechanism is a disc rotation driving mechanism that rotationally drives a chucked optical disc, an optical pickup that reproduces an information signal such as a musical tone signal recorded on the optical disc that is rotationally driven, and the optical pickup that drives the optical disc. It is composed of a pickup moving mechanism that moves in the radial direction.

Selection of an optical disk to be reproduced by such a disk reproducing mechanism is performed by a user selecting an operation switch. That is, when a predetermined signal is input by the operation of the operation switch, the control device outputs a predetermined control signal based on the input signal, and first, the rotary table is rotationally driven to move the selected disk storage unit to the disk storage unit. Move it to the front of the ejection position of the transport mechanism. Next, by operating the disc transport mechanism, the optical disc is taken out from the rotary table and transported to the disc playback mechanism, and the optical disc is loaded. As a result, the reproduction of the information signal such as the tone signal recorded on the optical disc is executed by the optical pickup.

When the reproducing operation is completed, the chucking of the optical disk by the disk reproducing mechanism is released, the optical disk is returned to the rotary table side by the disk conveying mechanism, and is housed in the original disk housing section. As a result, the predetermined reproduction operation by the above selection operation is completed and the next reproduction operation becomes possible.

[0008]

However, in the conventional disk device as described above, it is possible to select an arbitrary disk storage portion by the selection operation by the operation switch, but the optical disk is stored in the selected disk storage portion. Since the detection of whether or not is stored is performed by the focus operation by the optical pickup, there is a problem that it may take a long time to reproduce the information signal such as the tone signal recorded on the desired optical disc. .

That is, the rotary table is provided with 100 disc accommodating portions, and each disc accommodating portion can accommodate one optical disc, but whether all the disc accommodating portions can accommodate optical discs or not. Is at the discretion of the user. For example, only one optical disk can be mounted on the rotary table and used. Therefore, for example, when a disc storage section in which an optical disc is not stored is selected by the selection operation of the operation switch, the normal loading operation is performed regardless of the absence of the optical disc, and the result of the focus operation by the optical pickup is For the first time, the absence of an optical disc was detected.

Therefore, regardless of the presence / absence of an optical disc in the selected disc storage unit, a series of normal disc transport to performance start is carried out until the optical disc is conveyed from the rotary table to the disc reproducing mechanism to start reproduction performance. Since mechanical operation is required, there is a problem that it takes time before the presence or absence of an optical disc can be determined.
In particular, when determining the presence / absence of an optical disc in a plurality of disc storage units, a series of mechanical operations are repeated until the required optical disc is reached, which not only causes a significant loss of time but also mechanical operation. There was also a problem that repeated mechanical noise was generated due to.

As another conventional example, there is a device for detecting the presence or absence of an optical disk during the loading operation until the optical disk is taken out from the rotary table and chucked on the disk table. Since the detection is performed after the removal operation is completed, similarly, it takes time to determine the presence / absence of the optical disk, which not only causes a small loss of time, but also causes mechanical noise accompanying the mechanical operation.

The present invention has been made in view of the above conventional problems, and an optical sensor is provided in the vicinity of the recording medium storage portion, and a recording medium stored in the recording medium storage portion by the optical sensor is provided. By making it possible to detect the presence or absence,
An object of the present invention is to provide a recording medium detection device that can detect the presence or absence of an optical disc quickly and accurately, and a disc device having the detection device.

[0013]

In order to solve the above-mentioned problems and the like and to achieve the above-mentioned objects, the present invention provides a plurality of disc-shaped recording media stored in a plurality of recording-medium storage portions. An optical sensor having a light emitting unit that emits light toward any one of the recording media and a light receiving unit that receives the light is provided, and the optical axis between the light emitting unit and the light receiving unit is in the plane of the recording medium. The feature is that they are placed crossing each other.

Further, any one of a rotary table provided with a plurality of recording medium accommodating portions capable of accommodating a disk-shaped recording medium in a vertical arrangement and radially arranged and a recording medium accommodated in the recording medium accommodating portion is provided. An optical sensor having a light emitting unit that emits light toward the recording medium and a light receiving unit that receives the light;
A recording and / or reproducing mechanism for recording and / or reproducing information on a recording medium, and a recording medium housed on a rotary table is taken out and conveyed to the recording and / or reproducing mechanism, or recording and / or reproducing. A recording medium transport mechanism that takes out the recording medium mounted on the mechanism and transports it to a rotary table, and the optical axis between the light emitting unit and the light receiving unit is arranged to intersect the plane of the recording medium. I am trying.

According to the present invention having the above-described structure, when the recording medium is stored in the desired recording medium storage unit among the plurality of recording medium storage units, the light emitting unit of the optical sensor emits the recording medium. Since the emitted light is blocked by the recording medium and the light is not received by the light receiving section, it is possible to quickly and accurately know that the recording medium is present at the position being detected. On the other hand, when there is no recording medium in the desired recording medium housing portion, the light emitted from the light emitting portion is directly received by the light receiving portion, so it is prompt and accurate that there is no recording medium at the position being detected. I can know.

Further, since the presence or absence of a recording medium relating to the desired recording medium housing section can be detected quickly and accurately by an optical sensor having a light emitting section and a light receiving section, information such as a tone signal recorded on the desired recording medium can be obtained. The signal can be quickly reproduced.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 12 show an embodiment of the present invention, which is applied to a CD player showing a specific example of a disc device capable of accommodating a plurality of optical discs. FIG. 1 shows the disc of the present invention. 2 is an external perspective view of the apparatus with the front door opened, FIG. 2 is an external perspective view of the disk apparatus of the present invention with the front door closed, and FIG. 3 is a plan view showing the internal structure of the disk apparatus of the present invention. 4 is an enlarged plan view showing an essential part of the disk device shown in FIG. 3, FIG. 5 is a perspective view showing a disk transfer mechanism according to the present invention, FIG. 6 is a vertical sectional view of the disk device according to the present invention, and FIG. 10 is a side view of the recording medium detecting device of the present invention, FIG. 8 is a front view of the recording medium detecting device of the present invention, and FIG. 9 is a plan view of the recording medium detecting device of the present invention. FIG. 12 shows the operating states of the disc transport mechanism of the disc device of the present invention. It is an explanatory diagram.

As shown in FIGS. 1 and 2, the disk device of the present invention comprises a plurality of optical disks D each of which is a specific example of a disk-shaped recording medium in a housing 3 which constitutes a device body having a substantially rectangular shape. A disc storage device 4 capable of storing (100 discs in this embodiment), and a recording for taking out and transporting one optical disc D selected from a plurality of optical discs D stored in the disc storage device 4. A disk transport mechanism 5 showing a specific example of the medium transport mechanism, and a disk playback mechanism 6 showing a specific example of a recording and / or playback mechanism for playing back information recorded on the optical disk D transported by the disk transport mechanism 5. Etc. are built in.

The casing 3 has a box-shaped box body 3a having an opening on the front side and a front panel 3b for closing the front opening of the box body 3a. Is formed with an opening 3c. The opening 3c of the front panel 3b can be opened and closed by a front door 3d that is also rotatably attached to the front panel 3b. A part of the front side of the rotary table 8 rotatably attached to the box body 3a faces the interior of the opening 3c of the front panel 3b which is opened and closed by the front door 3d, and the optical disk D is accommodated through the opening 3c. And the take-out operation is possible.

Further, the front panel 3b has a power switch 1 for turning on / off the electric power supplied from an external power source.
9a, an operation dial 19b that can rotate the rotary table 8 in any direction to the left or right by a manual rotation operation, and many other operation switches 19c (for example, a reproduction switch, a pause switch,
Stop switch, etc.) is provided. The input state by the operation dial 19b and the operation switch 19c, and the operation state such as performance based on the input state are displayed by the display section 3e (for example, a liquid crystal display) provided below the opening 3c.

As shown in FIG. 6 and the like, the disk storage device 4 disposed in the housing 3 includes a rotary table 8 rotatably supported on the side of the box body 3a via a support shaft 7, and a rotary table 8. The rotary table 8 is provided with a table drive mechanism 9 that drives the rotary table 8 to rotate about the support shaft 7. The support shaft 7 penetrates through the center of the rotary table 8 and projects vertically, and the support pin 11 of the upper bearing plate 10 fixed to the top plate of the box body 3a of the housing 3 is provided at the upper end of the upper projection. Is rotatably fitted, and a support pin 13 of a lower bearing plate 12 fixed to the lower surface plate of the box body 3a is rotatably fitted to the lower end of the lower protrusion of the rotary table. 8 is rotatable in parallel with the bottom surface of the housing 3.

Further, the support shaft 7 is a lower surface piece 10a of the upper bearing plate 10 formed by bending so as to be parallel to the bottom surface of the housing 3.
And the upper bearing piece 12a of the lower bearing plate 12 are pierced through, the upper face piece 12a supports the rotary table 8 from below, and the lower face piece 10a prevents the rotary table 8 from moving upward. The rotary table 8 is always configured to rotate horizontally at a predetermined height position. Reference numeral 14 in the figure denotes a bearing ring fitted and fixed to the center of the upper portion of the rotary table 8.

As shown in FIGS. 3 and 6 to 12, the rotary table 8 has a disk shape in which the inner surface of the upper surface is bulged into a cylindrical shape, and the upper surface is inclined outward in the radial direction. In the portion, a plurality of disk storage portions 15 (100 in this embodiment) are formed radially around the rotation center of the support shaft 7 as a specific example of the recording medium storage portion. More specifically, the rotary table 8 includes a disc-shaped inner support 16 and the inner support 16.
And a ring-shaped outer support 17 arranged concentrically with a predetermined gap in the radial direction with respect to the inner support 16
And a large number of partition walls 18 that connect the outer supports 17 to each other. The partition walls 18 are arranged at equal angular intervals in the circumferential direction.
There are provided 100 disk storage portions 15 each of which is a concave portion curved in an arc shape by providing zero.

The disc storage portion 15 of the rotary table 8 includes an inner receiving portion 20 provided on the upper surface of the inner supporting body 16, an outer receiving portion 21 provided on the upper surface of the outer supporting body 17, and an adjacent partition wall. The operation port 22 is formed by an opening penetrating in the up-down direction and provided between 18 and. The inner receiving portion 20 and the outer receiving portion 21 are formed to have a V-shaped or U-shaped cross-section, and their bottom surfaces have a radius of curvature corresponding to the radius of curvature of the outer peripheral surface of the optical disc D. And has a substantially V-shaped cross section
V-shaped grooves 23 and 24 having a V shape are provided, respectively. The V-shaped groove 24 of the outer receiving portion 21 and the inner receiving portion 20
The lower portion of the optical disc D is supported by the outer peripheral side of the V-shaped groove 23, and the side portion of the optical disc D is supported by the inner peripheral side of the V-shaped groove 23 of the inner receiving portion 20.

Thus, when the optical disk D is stored in the disk storage portion 15 of the rotary table 8, both outer peripheral edges of the outer peripheral surface of the optical disk D come into contact with both slopes of the V-shaped grooves 23 and 24, respectively, and the optical disk D is formed by these slopes. D
Is supported. In addition, the outer peripheral edges of the outer peripheral surface of the optical disc D contact with lines over substantially the entire length of the V-shaped grooves 23 and 24,
The optical disc D is held so as to be sandwiched from both sides by the two parallel planes including the contact line. Therefore, due to the action of the V-shaped grooves 23 and 24, the optical disc D is securely held by the disc storage portion 15 and vertically supported in a state of standing upright so as to be substantially vertical.

Further, a ring-shaped first detection plate 25 and a second detection plate 26 are provided on the lower surface side of the rotary table 8 so as to be concentric with each other about the support shaft 7. The first detection plate 25 has a diameter larger than that of the second detection plate 26, and the lower end surface thereof has slits formed at a constant pitch in the circumferential direction. The number of these slits is the disc storage unit 1 provided on the rotary table 8.
It is formed in the same pitch corresponding to the number of 5, therefore,
In this embodiment, 100 slits are provided.

On the other hand, the second detection plate 26 is located inside the first detection plate 25, and ten slits are provided on the lower end surface thereof at different pitches in the circumferential direction. The ten slits of the second detection plate 26 having different pitches and the 100 slits of the first detection plate 25 having the same pitch are configured to identify the respective positions of the 100 disc storage portions 15. . And
Three optical sensors 27, 28, 29 are provided in association with the first and second detection plates 25, 26.

The three optical sensors 27 to 29 are each composed of a combination of a light emitting element and a light receiving element, and a mounting plate 30 fixed to a lower bearing plate 12 that pivotally supports the support shaft 7 of the rotary table 1. Is attached to. A first optical sensor 27 and a second optical sensor 28 are installed at a predetermined interval with respect to the first detection plate 25, and a third optical sensor 29 is provided with respect to the second detection plate 26. Is installed. The first to third optical sensors 27 to 29 are set to output, for example, high-level detection signals when detecting the slit portions of the corresponding detection plates 25 and 26, for example.

The detection signals of the three optical sensors 27 to 29 are
It is configured so that it can be supplied to a control device (not shown), and through a predetermined arithmetic processing by the arithmetic processing device, 100 disc addresses corresponding to the 100 disc storage portions 15 can be specified. By specifying the position of the disc storage portion 15 of the rotary table 1 in this manner, it is possible to accurately perform an operation such as taking out the optical disc D in the disc storage portion 15 having a desired disc number and playing back. it can.

On the lower surface side of the rotary table 8 and outside the first detection plate 25, both detection plates 25, 2 are provided.
A cylindrical lock plate 31 is provided so as to be concentric with the lock plate 6. The lock plate 31 is provided with 100 lock recesses 32 that are open to the outside in the radial direction at equal intervals in correspondence with the disc storage portion 15 of 100, and the stopper pin 33 is engaged with the desired lock recess 32. By doing so, rotation of the rotary table 8 is prevented and the rotary table 8 is positioned at a desired position, and the disk storage unit 1 having a desired disk number is formed.
The rotary table 8 can be locked with 5.

Reference numeral 34 shown in FIGS. 3 and 6 is a supporting roller for supporting the outer supporting body 17 which is the outer peripheral edge of the rotary table 8 from below, and is composed of five supporting rollers 34 arranged substantially evenly in the circumferential direction. By supporting the outer peripheral edge of the rotary table 8, flexural deformation of the outer peripheral edge of the rotary table 8 when the optical disk D is stored is prevented. The support roller 34 is rotatably attached to a support plate 35 fixed to the box body 3a by a support pin,
The function of the support roller 34 ensures the stability of rotation of the rotary table 8 under a heavy load such as when the optical disks D are stored in all the disk storage portions 15, for example.

Further, on the outer peripheral surface of the rotary table 8, that is, the outer peripheral surface of the outer support 17, a gear portion 36 is provided over the entire circumference thereof. The gear portion 36 is for rotating the rotary table 8. The output gear 37a of the reduction gear train 37 of the table drive mechanism 9 is meshed with the rotary table 8 via the reduction gear train 37. It is connected to the drive motor 38 so that power can be transmitted. The reduction gear train 37 includes five gears including an output gear 37a and a driven pulley 37b, and a drive belt 39 is wound between the driven pulley 37b and a drive pulley 38a fixed to the rotation shaft of the table drive motor 38. It has been passed. The table drive motor 38 is directly fixed to the base plate 40, while the reduction gear train 37 is rotatably attached to the base plate 40 via a plurality of shafts.

As shown in FIG. 5 and the like, the base plate 40
A stand plate 41 is erected upright, and a disc transport mechanism 5 and a disc reproducing mechanism 6 are provided in association with the stand plate 41. The stand plate 41 includes a standing plate portion 41a provided so as to stand upright on the base plate 40, and a bearing portion 41b continuously provided on one side in the surface direction of the standing plate portion 41a. An opening window 42 is formed in the portion 41a.
An arm bracket 43 is arranged in the opening window 42 of the stand plate 41, and the upper portion of the arm bracket 43 is rotatably supported by the stand plate 41, so that the arm bracket 43 is rotatably held at the lower portion of the arm bracket 43. The chucking plate 44 is configured to be swingable in the lateral direction.

As shown in FIG. 6, the stand plate 41
The base end of an upper bearing plate 10 that fixes and supports the support shaft 7 is fixed to the upper end of the. A disc guide 45 is arranged on one surface side of the upper bearing plate 10.
One end of 5 is rotatably supported on the tip side of the upper bearing plate 10, and the other end extends horizontally and is arranged above the arm bracket 43 so as to be vertically swingable. An engaging pin 46 is laterally inserted and engaged with an end portion of the disc guide 45 on the swinging side, and
The engagement pin 46 is fixed to an upper end portion of a guide link 47 that is held by the stand plate 41 so as to be slidable in the vertical direction on one surface side of the stand plate 41. As shown in FIG. 4, the lower end portion of the guide link 47 is laterally bent and arranged behind the cylindrical cam 50, and the cam pin 48 fixed to the tip of the bent portion is fixed by the spring 49 to the cylindrical cam 50. It is biased by the disc guide driving cam portion 54.

The cylindrical cam 50 is provided with an optical system driving cam portion 51 provided on the upper surface of a cylindrical cam body, an arm driving cam portion 52 provided on the outer peripheral surface of the cam body, and a lower portion of the cam body. Gear portion 53, the disc guide driving cam portion 54 provided on the upper surface of the gear portion 53, and the gear portion 53.
Rotary table drive cam 55 provided on the lower surface of the
And a stopper pin driving cam portion 56 provided on the lower surface of the cam body. The cylindrical cam 50 is rotatably fitted to a pivot 57 that is erected on the base plate 40, and the upper part of the center of rotation is the base plate 40.
It is rotatably supported by a cam bracket 58 fixed to the.

An output gear 61a of a reduction gear train 61 of a cam drive mechanism 60 is meshed with a gear portion 53 of the cylindrical cam 50, and the cylindrical cam 50 transmits power to a cam drive motor 62 via the reduction gear train 61. Connected as possible. The reduction gear train 61 is composed of seven gears including an output gear 61a and a driven pulley 61b, and a drive belt 63 is wound between the driven pulley 61b and a drive pulley 62a fixed to a rotation shaft of a cam drive motor 62. It has been passed. The cam drive motor 62 is fixed to the base plate 40, while the reduction gear train 61 is rotatably attached to the base plate 40 via a plurality of shafts.

Further, as shown in FIG. 5, a shaft sleeve 64 is fixed to the bearing portion 41b of the stand plate 41 with the center hole oriented in the lateral direction. The rotating shaft 65 is rotatably inserted. A first arm 66 is fixed to the tip of one of the protrusions of the rotating shaft 65 to be integrated in the rotating direction, and
A sleeve 67 is rotatably fitted inside the first arm 66, and the second arm 6 is attached to the sleeve 67.
8 is fixed and integrated in the rotating direction. And
Coil spring 69 fitted to the other protrusion of the rotary shaft 65
Thus, the first arm 66 and the second arm 68 are biased toward the shaft sleeve 64 side.

The first arm 66 has a working piece that extends to one side in the radial direction with the turning shaft 65 as the center of rotation, and an input piece that extends to the opposite side. The working piece of the rotary table 8 is the working piece. In order to avoid the outer supporting body 17, the outer supporting body 17 is formed in a U-shape, and the first conveying claw 70 is fixed to the tip portion thereof. The first transporting claw 70 is mounted on the disc reproducing mechanism 6 by lifting the optical disc D accommodated in the disc accommodating portion 15 of the rotary table 8 from below and moving it to the disc reproducing mechanism 6 side. This is for returning the optical disc D to the disc storage portion 15.
Therefore, the first transfer claw 70 is provided on the rotary table 8
The operation port 22 provided in each of the disc storage portions 15 has a shape corresponding to the planar shape of the operation port 22 so that the operation port 22 can pass in the vertical direction, and the optical disc D is held on the upper surface thereof so as not to be detached. A holding groove 71 is formed. Then, at the tip of the input piece of the first arm 66,
The slide pin 72 is fixed.

The second arm 68 extends to the input side of the first arm 66, and its tip is bent to the side of the first arm 66, and the second arm 68 has a second tip at its tip. The transport claw 73 is fixed. Second transport claw 7
Reference numeral 3 is for holding the optical disc D in cooperation with the first conveying claw 70 and for conveying the optical disc D between the rotary table 8 and the disc reproducing mechanism 6. Therefore, the second transport pawl 73 is formed with a holding groove 74 for holding the optical disc D so as not to be detached from the wheel, as with the first arm 66, and the holding groove 74 is held by the first transport pawl 70. Is attached to the second arm 68 so as to face the holding groove 71. A slide pin 75 is fixed in the middle of the second arm 68.

The slide pin 72 of the first arm 66.
A forked portion 76b provided at the tip of the horizontal portion 76a of the first L-shaped link 76 is slidably engaged with the. The first L-shaped link 76 is arranged on the side of the cylindrical cam 50 of the stand plate 41, and the two guide pins 77 fixed to the stand plate 41 are connected to the first L-shaped link 76.
The first L-shaped link 76 is slidably supported in the vertical direction by slidably engaging the two elongated holes provided in the vertical portion 76c. Further, the fork portion 78b provided at the tip of the horizontal portion 78a of the second L-shaped link 78 is slidably engaged with the slide pin 75 of the second arm 68. The second L-shaped link 78 is arranged so as to be overlapped with the first L-shaped link 76 with a predetermined gap therebetween, and at the same time, the two guide pins 7 are provided.
The second L-shaped link 78 is also slidably supported in the vertical direction by slidably engaging 7 with the two elongated holes provided in the vertical portion 78c of the second L-shaped link 78. .

An upper cam pin 79 protruding toward the cylindrical cam 50 is fixed to the base of the horizontal portion 76a of the first L-shaped link 76, and a cylindrical portion is provided at the base of the horizontal portion 78a of the second L-shaped link 78. A lower cam pin 80 protruding toward the cam 50 is fixed. The upper and lower cam pins 79, 80 are used for the cylindrical cam 50.
Are arranged so as to face each other in the vertical direction with the arm driving cam portion 52 interposed therebetween. A spring 81 is stretched between the first and second L-shaped links 76 and 78, and the spring force of the spring 81 causes the upper cam pin 7 to move.
9 is biased to the upper surface of the arm driving cam portion 52, and the lower cam pin 80 is biased to the lower surface of the arm driving cam portion 52. Due to the shapes of the upper and lower cam surfaces of the arm driving cam portion 52, the first arm 66 and the second arm 68 are given different movements as will be described later, so that the optical disc D can be transported.

The stopper pin driving cam portion 56 of the cylindrical cam 50 comprises a cam groove formed in a substantially C shape, and the stopper pin driving cam portion 56 has a cam pin 83 fixed to the base end of the slide lever 82. Are slidably engaged. The stopper pin driving cam portion 56 includes the cylindrical cam 50.
It is provided so as to be eccentric with respect to the pivot shaft 57 which is the center of rotation of the slide lever 82.
Is given a predetermined slide amount. Slide lever 82
Of the lever pin 82a extending toward the center of the rotary table 8 and erected on the base plate 40.
While the base end side is guided by, the tip end is rotatably connected to the base end of the swing lever 84. A rotating shaft 85 is inserted in the middle of the swing lever 84, and the stopper pin 33 is fixed to the tip on the opposite side and protrudes upward. The rotating shaft 85 is erected on a support plate 86 slidably supported on the base plate 40.

Thus, by retracting the slide lever 82, the stopper pin 33 moves forward through the swing motion of the swing lever 84. As a result, the stopper pin 33
Enter into the lock concave portion 32 provided in the lock plate 31 of the rotary table 8, whereby the rotary table 8 is locked in the rotation direction. On the other hand, when the slide lever 82 is moved forward and the stopper pin 33 is retracted, the stopper pin 33 comes out of the lock recess 32, whereby the rotation direction lock of the rotary table 8 is released.

Further, the support plate 86 is provided with a long hole 86a extending in the direction in which the slide lever 82 extends and a plurality of long holes 86b extending in a direction intersecting with the long hole 86a. Protrusions bulging from the base plate 40 are engaged with a plurality of elongated holes 86b of the support plate 86, and by restricting the movement of the support plate 86 by these protrusions, the support plate 86 slides only in the intersecting direction. It is possible. An adjusting screw 87, which is rotatably supported by the base plate 40, is inserted into the elongated hole 86a of the supporting plate 86.
An eccentric shaft portion provided between the head portion and the shaft portion is rotatably fitted in the elongated hole 86a.

Thus, by rotating the adjusting screw 87 to eccentrically move the eccentric shaft portion, the support plate 86 can be slid in the direction in which the elongated hole 86b extends in accordance with the amount of eccentricity of the eccentric shaft portion. When the support screw 86 is slid by rotating the adjusting screw 87 in this manner, the position of the stopper pin 33 changes together with the rotation shaft 85, and accordingly, the swing position of the stopper pin 33 is changed. As a result, the lock position of the rotary table 8 that is locked at the forward position of the stopper pin 33 can be adjusted.
By making the lock position of the rotary table 8 changeable in this manner, the position of the operation port 22 of each disc storage portion 15 at a predetermined position of the rotary table 8 can be aligned with the first arm 66.

Further, the disc guide driving cam portion 54 of the cylindrical cam 50 is composed of an arcuate ridge extending in the circumferential direction, and an inclined surface is provided at one end in the circumferential direction of the disc guide driving cam portion 54. The cam pin 48 can be moved up and down. The cam pin 48 is aligned with the cam portion 5 along the inclined surface.
The guide link 47 is lifted by an amount corresponding to the lift of the cam pin 48 when the guide link 47 is lifted up. By the function of the disc guide driving cam portion 54, the optical disc D
At the time of chucking, the cam pin 48 is lifted, and one end of the disc guide 45 is lifted through the operation of the guide link 47 and the engaging pin 46 which are integral with the cam pin 48. Thereby, it is considered that the optical disc D does not come into contact with the disc guide 45 even when the disc guide 45 is separated from the optical disc D and shake occurs during rotation.

Further, the rotary table driving cam portion 55 of the cylindrical cam 50 is composed of an arcuate ridge extending in the circumferential direction, and detects the rotational direction of the cylindrical cam 50 as shown in FIGS. The control switch 88 is turned on / off by the circumferential edges of the rotary table driving cam portion 55. The detection signal of the control switch 88 is input to a control device (not shown) serving as control means having a CPU (central processing unit), RAM / ROM (storage device) and the like. Then, the control device executes predetermined arithmetic processing based on the detection signal of the control switch 88 and outputs the control signal to the table drive motor 38 and the cam drive motor 62, so that loading of the optical disc, reproduction performance, etc. will be described later. Run.

Further, the optical system driving cam portion 51 of the cylindrical cam 50 is composed of a substantially C-shaped cam groove, and this optical system driving cam portion 51 is also the stopper pin driving cam portion 5.
As in the case of No. 6, it is provided so as to be eccentric with respect to the pivot 57 which is the center of rotation of the cylindrical cam 50. As shown in FIG. 6, a cam pin 92 fixed to the lower end of a frame plate 91 on which an optical pickup 90 is mounted is slidably engaged with the optical system driving cam portion 51. A predetermined opening / closing operation is given to the frame plate 91 by the eccentric amount of 51.

That is, as shown in FIGS. 3 and 6, the frame plate 91 is the cylindrical cam 5 of the stand plate 41.
It is arranged so as to face the 0 side with a predetermined interval. The frame plate 91 is formed by the support shaft 58a provided on the cam bracket 58 and the support shaft 93a provided on the arm bracket 93 fixed to the upper surface of the stand plate 41.
Both the upper and lower ends of the rear part are pivotally supported, so that the rotary table 8 side of the frame plate 91 is swingable in the left-right direction. Furthermore, the frame plate 9
The cam pin 92 is provided in the lower part of 1, and can be opened and closed on the side of the cylindrical cam 50 which is the lower side by the movement of the cam pin 92 by the optical system driving cam portion 51.

A plurality of mounting means 9 are mounted on the frame plate 91 which can be swung left and right and downward as described above.
The mounting plate 95 is elastically supported in the front-back, left-right and up-down directions through the mounting plate 9.
5 is configured to absorb the vibration applied thereto.
A spindle motor and a pickup drive motor 96 are fixed to the attachment plate 95, and a disc table 97 is attached to the rotary shaft of the spindle motor. The disk table 97 is provided with a truncated cone-shaped convex portion so that the optical disk D can be aligned and held, and the chucking plate 44 is arranged so as to be able to approach and separate from the disk table 97 so as to face the disk table 97. There is.

A feed screw shaft 99 is connected to a pickup drive motor 96 mounted on a mounting plate 95 through a reduction gear train 98, and the feed screw shaft 99 is a feed screw shaft fixed to one side of the optical pickup 90. Nut 100
Are screwed together. The feed screw shaft 99 is a mounting plate 95.
The guide rail 101 is rotatably supported by the mounting plate 95 so as to be parallel to the feed screw shaft 99.
It is provided in. A bearing member 102 fixed to the other side of the optical pickup 90 is slidably engaged with the guide rail 101, and the optical pickup 90 is movable between the guide rail 101 and the feed screw shaft 99. Is held.

Thus, the rotational force of the pickup drive motor 96 is transmitted to the reduction gear train 98 to rotate and drive the feed screw shaft 99, whereby the optical pickup 90 is guided by the guide rail 101 in the radial direction of the disc table 97. Move to approach or leave. When the optical pickup 90 moves, the information recorded on the recording surface of the optical disc D is read, and the reproduction performance or the like is executed. Therefore, the optical pickup 90 contains a light source such as a laser diode, a predetermined optical device such as a beam splitter and a collimator lens, and a photodiode and the like.

Further, as shown in FIG. 6, an optical disc D having a predetermined diameter, which is accommodated in the disc accommodating portion 15 of the rotary table 8, is located radially outside the rotary table 8 and near the disc transport mechanism 5. Optical sensor 1 for detecting the presence or absence of (CD of 12 cm in diameter in this embodiment)
10 are provided. The optical sensor 110 is fixed to the lower surface side of the box body 3a and emits a predetermined light, and the light receiving section 112 is fixed to the upper surface side of the box body 3a and receives light from the light emitting section 111. It consists of and. For example, a light emitting diode (LED) can be applied as the light emitting unit 111 of the optical sensor 110, and, for example, a phototransistor can be applied as the light receiving unit 112.

The light emitting portion 111 and the light receiving portion 112 of the optical sensor 110 are located outside the rotary table 8 in the radial direction at positions where they do not come into contact with the optical disc D supported substantially vertically in the disc storage portion 15. Moreover, the optical axis L is arranged so as to intersect the plane (vertical surface) of the optical disc D. That is, as shown in FIG. 6, the light emitting portion 111 is fixed to the mounting panel 113 with the light emitting port 111a of the light facing upward, and the mounting panel 113 is formed on the support plate 4 formed on the base plate 40.
0a. Further, the light receiving portion 112 is fixed to the mounting panel 114, and the mounting panel 114
Are attached to the upper bearing plate 10.

Then, as shown in FIG.
The emission port 111a of the optical disc Db is a disc to be detected, which is located next to the one side of the optical disc Da.
On the other hand, the light receiving portion 112 is located on the inner side of the optical disc Dc by approximately one pitch, while the light receiving portion 112 is located inside the optical disc Dc accommodated in the disc accommodating portion 15 on the other side of the optical disc Da to be detected. It is biased to the other surface side by about one pitch so as to be positioned, and thereby the light emitting portion 111 and the light receiving portion 112 are provided with the above intersection angle. In the case of the present embodiment, the angle of intersection of the optical axis L of the light emitting section 111 with the plane of the optical disc Da is about 9 degrees. Further, the light emitting port 111a of the light emitting section 111 is formed in a slender shape in the radial direction of the rotary table 8, whereby the circumferential direction of the rotary table 8, in other words, the optical disk Da.
It suppresses the emission of light in the direction orthogonal to the plane.

Further, 103 shown in FIG. 6 is a front panel 3
It is a disk cover arranged above the rear side of the opening 3c of b, and is screwed to the upper bearing plate 10 by a mounting bracket 104. The disc cover 103 is formed in an arc shape so that the optical disc D stored in the disc storage portion 15 of the rotary table 8 can pass in the horizontal direction, and is provided with a ring-shaped pop-out prevention band 105. Cage and this pop-out prevention band 105
This prevents the optical disc D from jumping out of each disc storage portion 15.

Incidentally, the first and second arms 66, 68
And the first and second transfer claws 70, 73 and the first and second L
The disk-transporting mechanism 5 is configured by the shape links 76, 78 and the cylindrical cam 50, and the disk-playing mechanism 6 is configured by the optical pickup 90, the frame plate 91, the disk table 97, the arm bracket 43, the chucking plate 44, and the like. ing.

The disk device having such a structure is
For example, by using as follows, a desired one optical disk D can be selected from a plurality of optical disks D and a reproduction performance can be executed. First, an appropriate number of optical disks D are stored in the disk storage device 4 in the housing 3. In this embodiment, 100 disk storage units 15 are set in the rotary table 8 of the disk storage device 4, and one optical disk D can be stored in each disk storage unit 15. One optical disk D can be stored. The size of the optical disk D used is generally 12 inches,
It is also possible to use an 8-inch optical disk by using an adapter.

In this case, the work of storing the optical disc D in each disc storage portion 15 of the disc storage device 4 is first performed manually. First, as shown in FIG. 1, the front door 3d at the center of the front panel 3b is pulled toward the front to open the opening 3c to expose the front side of the rotary table 8. Next, the optical disc D held in the hand is inserted vertically into the opening 3c, and the optical disc D is stored in the disc storage portion 15 located on the front side of the rotary table 8. When a plurality of optical discs D are to be stored, the front operation dial 19b is turned in any direction to rotate the rotary table 8 to the right or the left, and the vacant disc storage portion 15 is searched for. To store.

At this time, unique addresses from 1 to 100 are assigned to the disc storage portion 15 of 100, and the position of the rotary table 8 is controlled by the control device for controlling the operation of the disc device. It is based on the street address. Therefore, in the subsequent reproduction performance and the like, the relationship between the address of each disk storage portion 15 of the disk storage device 4 and the optical disk D stored in the disk storage portion 15 corresponding to the address is clarified in advance. There is a need.

Therefore, in this type of disc device, a storage device that can freely write and erase information is usually provided, and when the optical disc D is stored, the information of the stored optical disc D is input for each address. It is possible. The information on this optical disc D is recorded on the front panel 3b.
The information about the optical disc D stored in the disc storage unit 15 located in front of the disc transfer mechanism 5 on which the loading is performed can be displayed by the display unit 3e disposed on the front surface of the disc. It is displayed on the display unit 3e.

When the optical disc D is stored in the disc storage portion 15 of the rotary table 8 in this way, in the case of the present embodiment, the optical disc D is held in a substantially vertical state in each disc storage portion 15. . That is, since both outer peripheral edges of the outer peripheral surface of the optical disc D are supported by the V-shaped grooves 23 and 24 of the disc storage portion 15, the optical disc D can be securely held in a substantially vertical state without rattling. You can

Thus, as in the present embodiment, 100 disk storage portions 15 are arranged radially on the rotary table 8 arranged on the same circumference, and the optical disk D is stored in each disk storage portion 15 and supported in a donut shape. By doing so, the gap between the adjacent optical disks D can be narrowed as much as possible inside the rotary table 8. As a result, it is possible to reduce the space in the housing 3 to reduce the size of the entire disc device, and also to secure a sufficiently wide gap on the outer side in the radial direction of the rotary table 8 between the adjacent optical discs D. .

Next, a case will be described in which the optical disk D stored in the disk storage portion 15 of the rotary table 8 is taken out by the disk transfer mechanism 5 and transferred, and is mounted on the disk reproduction mechanism 6 to perform reproduction performance. The operation of transporting the optical disc D can be performed as follows, for example.

In the initial state before this operation is started, the stopper pin 33 is in the retracted position by the action of the stopper pin driving cam portion 56 of the cylindrical cam 50, as shown in FIG. 8 is not engaged with any of the lock recesses 32 provided in the lock plate 31, and therefore the rotary table 8 is in a rotatable state. Further, the rotary table driving cam portion 55 of the cylindrical cam 50 is in contact with the operator 88a of the control switch 88, and the detection signal thereof is input to the control device. Further, as shown in FIG. 5, by the action of the arm driving cam 52 of the cylindrical cam 50, the first arm 66 is pushed down and positioned below the rotary table 8, while the second arm 68 is retracted rearward. It is located below the chucking plate 44.

Furthermore, due to the function of the optical system driving cam portion 51 of the cylindrical cam 50, the rotary table 8 side of the frame plate 91 is slightly opened, and the disc table 97 is opened.
Are separated from the chucking plate 44. On the other hand, the cam pin 48 is provided on the disc guide driving cam portion 54.
Are not in contact with each other, and the guide link 47 has a spring 49.
The disk guide 45 is in the lowered state because it is pushed down by the spring force of.

From this state, after turning on the power switch 19a shown in FIG. 1 to supply power to the disk device, the optical disk D desired to be reproduced and played is selected, and the disk in which the selected optical disk D is stored. The address number of the storage section 15 is input by the operation switch 19c. In this case, the optical sensor 110 constantly (or at every predetermined timing) determines whether or not the optical disc D is stored in the disc storage portion 15 of the rotary table 8 located at the take-out position of the optical disc D by the disc transport mechanism 5. ) Is detected, and the detection signal is input to the controller device.

That is, as shown in FIGS. 7 to 9, when the light emitting portion 111 of the optical sensor 110 emits light, the light is within a range limited by the shape of the light emitting port 111a.
The light travels toward the light receiving unit 112 that is installed opposite to the optical axis L. At this time, the disc storage portion 1 located at the eject position
When the optical disk Da is present in the optical disk 5, the light is not received by the light receiving section 112 because the light blocking section X located outside the optical axis L of the optical disk Da blocks the progress of the light, as shown in FIG. Therefore, the light receiving unit 112 sends a detection signal indicating that the predetermined light is not received to the control device. Based on this detection signal, the control device determines that the optical disc D is in the disc storage portion 15 at the eject position, and also determines the address number of the disc storage portion 15 based on the detection signals from the three optical sensors 27 to 29. to decide. Then, these judgment results are displayed on the display unit 3e of the front panel 3b.

On the other hand, when the optical disk D is not housed in the disk housing section 15 at the take-out position, the light from the light emitting section 111 is directly received by the light receiving section 112, so that the light receiving section 112 has a predetermined size. A detection signal indicating that light is received is sent to the control device. Based on this detection signal and the detection signals from the optical sensors 27 to 29, the control device determines that there is no optical disc D in the disc storage portion 15 at the eject position, determines the address number, and displays it on the display portion 3e. indicate.

Thus, by providing the optical sensor 110, the optical disc D can be stored in the disc storage portion 15 at the take-out position.
It is possible to instantly determine whether or not is stored. Therefore, in a CD changer capable of accommodating as many as 100 optical discs D at a time, the target optical disc D can be searched easily and in a short time from the accommodated optical discs D, and desired music or the like can be quickly performed. Can be played. Moreover, since the optical axis of the optical sensor 110 is provided on the outer peripheral portion of the rotary table 8,
As shown in FIG. 7, an optical disc Dd having a smaller diameter than the optical disc D to be detected (for example, a CD having a diameter of 8 cm) is not detected. Therefore, this optical sensor 110 can detect only CDs of a target size, excluding CDs having different diameters.

Further, the optical axes L of the light emitting section 111 and the light receiving section 112 are arranged so as to intersect with the plane of the optical disc D, so that the surface of the optical disc D is irradiated with light and not only the light directly input but also the reflected light is received. Since light is also received, it is possible to configure the optical sensor 110 using an inexpensive photoelectric conversion element such as a light emitting diode or a phototransistor. Furthermore,
Since it is an optical sensor, it is possible to maintain the quietness of the disk device without generating operation noise unlike the mechanical sensor.

The rotary table 8 can be rotated by manually turning the operation dial 19b. In this case as well, the address number of the disc storage portion 15 moved to the eject position is displayed on the display portion 3e. . At this time, the disc storage portion 15 that opens the front door 3d and faces the opening 3c
By looking at the label of the optical disc D stored in the optical disc D, the contents of the optical disc D can be visually confirmed.

Next, the selection signal of the optical disk D selected as described above is input to the control device, which causes the control device to sequentially output a predetermined control signal to drive the table drive motor 38 and the cam drive. Motor 6
2 is drive-controlled. The control device first supplies a drive current to the table drive motor 38 of the table drive mechanism 9, transmits the rotational force of the rotation shaft to the gear portion 36 of the rotary table 8 via the drive belt 39 and the reduction gear train 37, The rotary table 8 is rotationally driven until the disc storage portion 15 in which the selected optical disc D is stored moves to the take-out position in the front part of the disc transport mechanism 5.

When the desired disk storage portion 15 is installed facing the front portion of the disk transport mechanism 5 by the rotation of the rotary table 8, the control device causes the cam drive motor 6 to move.
2 is supplied with a drive current to rotate its rotary shaft to transmit the rotational force to the gear portion 53 of the cylindrical cam 50 via the drive belt 63 and the reduction gear train 61, so that the cylindrical gear 50 moves in one direction (for example, the forward rotation direction). ) To rotate. As a result, first, the cam pin 8 engaged with the stopper pin driving cam portion 56 is
3 moves to the rotation center side of the cylindrical cam 50 to move the slide lever 82 backward, and the swing lever 84 around the rotation shaft 85.
By swinging the stopper pin 33 to the rotary table 8
Rock to the side. As a result, the stopper pin 33 enters the lock concave portion 32 corresponding to the selected disc storage portion 15, whereby the rotary table 8 is locked at the desired position.

A little after the movement of the stopper pin 33, the cam portion 52 is actuated by the arm driving cam portion 52.
Slide pin 72 fixed to the first L-shaped link 76 biased to the upper surface of the slide pin 7 and slide pin 7 fixed to the second L-shaped link 78 biased to the lower surface of the cam portion 52.
5, the upper slide pin 72 is pushed down, while the lower slide pin 75 is pulled up. As a result, the forked portion 76b provided at the tip of the horizontal portion 76a of the first L-shaped link 76 pushes down the slide pin 72 slidably engaged with the horizontal portion 76a, while the second L-shaped link 78 horizontally extends. A forked portion 78b provided at the tip of the portion 78a pulls up the slide pin 75 slidably engaged with the forked portion 78b.

As a result, in FIG. 6 and FIG.
The arm 66 rotates in the counterclockwise direction about the rotating shaft 65, while the second arm 68 rotates in the opposite clockwise direction about the rotating shaft 65. Then, as shown in FIG. 11, the first transfer claw 70 provided at the tip of the first arm 66 is provided on the rotary table 8 in the selected disk storage portion 15.
The optical disc D stored in the disc storage portion 15 is pushed up from below to be taken out from the disc storage portion 15, and the second transfer provided at the tip of the second arm 68 is performed. The claw 73 moves so as to reach the optical disc D, and both the transport claws 70 and 73 hold the optical disc D so as to sandwich it in the diameter direction. When the cylindrical cam 50 further rotates in the normal direction, the second arm 68
Only the rotation direction of the first and second conveyance claws 70,
73 cooperates to rotate counterclockwise.

Such first and second arms 66, 6
By the rotation of 8, the optical disk D is guided by the disk guide 45 and moved to the disk reproducing mechanism 6 side. And
When the optical disc D is held by the first and second conveying claws 70 and 73 and moves to a predetermined chucking position, the optical system driving cam portion 51 closes the opening side of the frame plate 91, and the optical disc D can be rotated. The disk table 97 held by is parallel to the chucking plate 44 held by the stand plate 41. As a result, the chucking plate 44 is attracted to the disc table 97 across the optical disc D by the magnetic force of the magnet fixed to the chucking plate 44. As a result, the optical disc D is rotatably held on the disc table 97, and the chucking operation of the optical disc D is completed.

After the chucking operation is completed, as shown in FIG. 12, the second arm 68 further rotates counterclockwise so that the second conveying claw 73 is separated from the optical disc D, while the first arm 68 is rotated counterclockwise. The arm 66 rotates in the opposite clockwise direction to the extent that the first conveying claw 70 moves away from the optical disc D.
At the same time, the cam pin 48 fixed to the guide link 47 is pushed up by the action of the disc guide driving cam portion 54, and the guide link 47 is raised by the pushing amount. As a result, the outer end of the disc guide 45 is lifted away from the optical disc D by the engagement pin 46 fixed to the guide link 47. As a result, the preparation for the reproduction performance of the optical disc D is completed.

It is to be noted that the first and second transporting claws 70, 73 and the disc guide 45 are separated from the optical disc D by an appropriate amount in order to cause the optical disc D to vibrate due to excessive vibration during reproduction and the like. Even if
This is to prevent the optical disc D from coming into contact with the first transport claw 70 and the like.

Thereafter, the control device outputs a control signal for reproduction and performance, drives the spindle motor to rotate the optical disc D mounted on the disc plate 97, and drives the pickup drive motor 96 to drive the optical disc D. The pickup 90 is moved in the radial direction of the optical disc D. At this time, the optical pickup 90 reads the information recorded on the information recording surface of the optical disc D, and the reproduction performance is executed based on the read information.

When the desired reproduction performance is completed, the control device causes the cam drive motor 62 and the table drive motor 3 to operate.
A control signal for rotating and driving 8 in the opposite direction to the above is output, and a transport operation for returning the optical disc D to the disc storage device 4 is performed. First, the control device outputs a control signal for rotationally driving the cam drive motor 62 in the direction opposite to the rotational direction, and rotationally drives the cylindrical cam 50 in the reverse direction opposite to the normal direction. As a result, from the state shown in FIG. 12, the guide link 47 is pushed down via the cam pin 48 by the rotation of the disc guide driving cam portion 54 of the cylindrical cam 50, and the engagement pin 46 integrated therewith is lowered to guide the disc guide. The outer end of 45 is pulled down and approaches the upper side of the optical disc D.

At the same time, the rotation of the arm driving cam portion 52 of the cylindrical cam 50 causes the upper and lower cam pins 79 and 80 to move up and down, and first, the upper cam pin 79 is pushed down to move the first L-shaped link 76. While the lower cam pin 80 is pulled up, the second L-shaped link 78 rises. As a result, in FIG. 12, the first arm 66 rotates counterclockwise, and the first transport claw 70 moves to the optical disc D.
While the second arm 68 rotates clockwise, the second carrying claw 73 approaches the optical disc D and supports it from the rear side.

A little later than this, the optical system driving cam portion 5
The rotation of 1 moves the cam pin 92 to the side of the pivot 57 that supports the cylindrical cam 50, and opens the rotary table 8 side of the frame plate 91. As a result, the disc table 97 is separated from the chucking plate 44 against the attraction force of the magnet, the optical disc D is released, and the loading state is released. As a result, the optical disc D is supported by the first transport claw 70 and the second transport claw 73 from below at the front and back, and at the same time by the disc guide 45 at the top.

When the cylindrical cam 50 is further rotated in the reverse direction, the upper cam pin 79 is pushed up and the lower cam pin 80 is pulled up by the rotation of the arm driving cam portion 52, and the first L-shaped link 76 and the second L-shaped link 76 and the second L-shaped link 76 are formed. L-shaped link 78 of both of them rises. As a result, as shown in FIG.
Both the arm 66 and the second arm 68 rotate clockwise about the rotation shaft 65. As a result, as shown in FIG. 10, the optical disc D moves to the rotary table 8 side along the disc guide 45. Then, the first transport claw 70 passes through the operation port 22 of the disc storage portion 15 and moves below the rotary table 8, so that the optical disc D is returned into the original disc storage portion 15.

At the same time, the slide lever 82 is pushed out by the rotation of the rotary table driving cam portion 55, so that the stopper pin 33 retracts through the swing of the swing lever 82 and engages with the lock recess 32. Is canceled. As a result, the rotary table 8 becomes rotatable and the operation for reproducing and playing the next optical disk D becomes possible.

As described above, the present invention is not limited to the above embodiment. For example, in the above embodiment, a light emitting diode is used as the light emitting portion 111 of the optical sensor 110 and a phototransistor is used as the light receiving portion 112. Although the example of use has been described, other light emitting elements such as an EL panel can be applied as the light emitting section, and other light receiving elements such as a photodiode and a photothyristor can be applied as the light receiving section. Further, in the above embodiment, the example in which the read-only optical disc D is used as the recording medium has been described, but a write-once type rewritable type magneto-optical disc that can be written only once and a rewritable type that can be rewritten many times can be used.

Further, in the above-mentioned embodiment, the case where a reproduction-only CD player having a rotary table capable of accommodating a large number of optical disks D arranged in the circumferential direction at a time is applied as an embodiment of the disk device has been described. , A stocker for accommodating recording media such as optical disks D arranged in a stepwise manner is provided so as to be movable in the vertical direction or the horizontal direction,
The recording medium stored in this stocker is used as the optical sensor 11
It is needless to say that it is possible to adopt a configuration in which 0 is detected, and further, it is possible to apply to a disk device that can perform not only reproduction but also recording. Thus, the present invention
Various changes can be made without departing from the spirit of the invention.

[0088]

As described above, according to the recording medium detecting apparatus of the present invention, the light emitting portion which emits light toward any one of the plurality of disc-shaped recording media and the light emitted from the light emitting portion. Since the optical sensor having a light receiving portion for receiving is provided and the optical axis between the light emitting portion and the light receiving portion is provided so as to intersect the plane of the recording medium, the recording medium is stored in an arbitrary recording medium storage portion at a predetermined detection position. It is possible to instantly and accurately detect whether or not is stored.

Moreover, since the optical axis between the light emitting portion and the light receiving portion is intersected with the plane of the recording medium so that the light strikes the plane of the recording medium obliquely, the recording medium is stored in the predetermined recording medium storage portion. In such a case, it is possible to reflect light on the plane of the recording medium and concentrate a large amount of light on the light receiving portion so that a larger amount of light can be received by the light receiving portion.
Therefore, as the configuration of the light emitting unit and the light receiving unit of the optical sensor,
Generally, a light emitting element such as an inexpensive light emitting diode and a light receiving element such as an inexpensive phototransistor can be applied. The structure is simple and inexpensive, and the presence or absence of a recording medium or the size of the recording medium is small or large. It is possible to obtain the effect that the detection of can be performed quickly and accurately.

Further, according to the disk device of the present invention, an inexpensive light emitting element such as a light emitting diode can be used as a light emitting section, and an inexpensive light receiving element such as a phototransistor can be used as a light receiving section, and the structure is An optical sensor that is simple and inexpensive to manufacture, and that can detect a recording medium quickly and accurately is provided, and the presence or absence of the recording medium stored in the recording medium storage portion is detected by the optical sensor. Therefore, the presence or absence of the recording medium can be instantly detected, and the reproduction or recording of information on the desired recording medium can be performed quickly and accurately. There is no risk of mechanical noise due to the operation of the mechanical configuration until
There is an effect that information can be reproduced or recorded on a target recording medium without generating noise.

[Brief description of drawings]

FIG. 1 shows an embodiment of a disc device of the present invention, and is an external perspective view of a state in which a front door is opened.

FIG. 2 shows an embodiment of the disk device of the present invention and is an external perspective view with the front door closed.

FIG. 3 is a plan view of the internal structure showing an embodiment of the disk device of the present invention.

FIG. 4 is an enlarged view of a main part of FIG. 3 and is a plan view of a disc carrying mechanism according to a disc device of the present invention.

FIG. 5 is a perspective view showing a disc carrying mechanism according to the disc device of the present invention.

FIG. 6 is a vertical cross-sectional view showing an embodiment of the disk device of the present invention.

FIG. 7 is a side view illustrating the operation of the optical sensor according to the disk device of the present invention.

FIG. 8 is a front view illustrating the operation of the optical sensor according to the disk device of the present invention.

FIG. 9 is a plan view illustrating the operation of the optical sensor according to the disk device of the present invention.

FIG. 10 is an explanatory view showing an operating state of the disc carrying mechanism according to the disc device of the present invention, showing a state before the optical disc is carried.

FIG. 11 is an explanatory diagram showing an operating state of the disc transport mechanism according to the disc device of the present invention, showing a state during transport of the optical disc.

FIG. 12 is an explanatory view showing an operating state of the disc carrying mechanism according to the disc device of the present invention, showing a state after the optical disc is carried.

[Explanation of symbols]

 4 disc storage device (recording medium storage device) 5 disc transport mechanism (recording medium transport mechanism) 6 disc playback mechanism (recording and / or playback mechanism) 8 rotary table 15 disc storage portion (recording medium storage portion) 44 chucking plate 45 Disc guide 50 Cylindrical cam 60 Cam drive mechanism 66 First arm 68 Second arm 70 First transport claw 73 Second transport claw 90 Optical pickup 97 Disc table 110 Optical sensor 111 Light emitting part 111a Light emitting port 112 Light receiving part D Optical disc (disc-shaped recording medium) L optical axis

Claims (5)

[Claims] 1. A light emitting unit that emits light toward any one recording medium of a plurality of disc-shaped recording media stored in a plurality of recording medium storage units, and a light receiving unit that receives the light. A recording medium detecting device, comprising: an optical sensor having: and an optical axis between the light emitting unit and the light receiving unit, the optical axis being crossed with respect to the plane of the recording medium. 2. The recording medium detecting device according to claim 1, wherein the recording medium housing portion is composed of a plurality of concave portions arranged radially on a rotary table, and the recording medium housing portion is provided with the recording medium. A recording medium detecting device characterized in that the medium can be stored vertically one by one. 3. The recording medium detecting device according to claim 2, wherein the optical sensor vertically emits light radially outside the rotary table so as to sandwich the recording medium housed in the recording medium housing from above and below. A recording medium detection device characterized in that a recording section and a light receiving section are arranged. 4. A rotary table in which a plurality of recording medium storage units capable of storing a disc-shaped recording medium in a vertical direction are radially arranged, and any one of the recording media stored in the recording medium storage unit. An optical sensor having a light emitting portion that emits light toward one recording medium and a light receiving portion that receives the light; and recording and / or reproducing for recording and / or reproducing information on the recording medium. Mechanism and recording medium stored in the rotary table is taken out and conveyed to the recording and / or reproducing mechanism, or recording medium mounted in the recording and / or reproducing mechanism is taken out and conveyed to the rotary table A disk drive comprising a medium transport mechanism, wherein an optical axis between the light emitting portion and the light receiving portion is arranged to intersect with a plane of the recording medium. 5. The disk device according to claim 4, wherein the optical sensor vertically emits light at the outer side in the radial direction of the rotary table so as to sandwich the recording medium housed in the recording medium housing from above and below. A disk device having a light receiving section.