JPH05342732A - Recording and/or reproducing apparatus for disk-shaped recording medium - Google Patents

Abstract

PURPOSE:To lower the production cost of an apparatus itself and to make the apparatus small-sized by a method wherein a tray can be loaded by means of a simple constitution. CONSTITUTION:An optical-disk reproducing apparatus is provided with the following: a spindle motor M on which an optical disk is mounted and which turns and drives the mounted optical disk in one direction; and an optical pickup 5 which can be moved in the radial direction of the optical disk 3. In the optical-disk reproducing apparatus, a tray 4 on which the optical disk 3 is placed is attached so as to be freely put into and take out from a drive part 2 and an information signal is replayed by means of the optical pickup 5 with reference to the optical disk 3 placed on the tray 4. The optical-disk reproducing apparatus is constituted so as to install the spindle motor M on the tray 4. In this case, a self-clamping mechanism 21 is installed on a turntable 18 for the spindle motor M, and the optical disk 3 is mounted on the turntable 18 via the self-clamping mechanism 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a read-only optical recording medium (generally called a CD-ROM), a rewritable optical recording medium, and a rewritable magneto-optical medium by optical modulation or magnetic field modulation. The present invention relates to a recording and / or reproducing apparatus for recording and / or reproducing on a disc-shaped recording medium such as a recording medium.

[0002]

2. Description of the Related Art Recently, as a disc-shaped recording medium, a read-only optical recording medium (generally referred to as a CD-ROM), a rewritable optical recording medium, or other optical recording or magnetic field modulation is possible. Various magneto-optical recording media have been proposed, and CD-ROMs and magneto-optical recording media are now in practical use.

Here, as one example, a CD-ROM
(Hereinafter referred to as an optical disc). A typical example is a tray system as a loading system for an optical disk reproducing apparatus that optically reads information signals from this optical disk.

As shown in FIG. 8, this tray type optical disk reproducing apparatus (hereinafter simply referred to as reproducing apparatus) is
Insert the tray 102 on which the optical disc 101 is placed into the insertion slot 1
The optical disk 10 is provided below the inserted tray 102 with a slide mechanism that uses a known motor (not shown) as a drive source that slides freely in and out of the drive unit 104 via 03.
Spindle motor M for rotating 1 and optical disk 1
An optical pickup 105 that optically reproduces an information signal with respect to 01 and converts it into an electric signal is arranged.

Both the spindle motor M and the optical pickup 105 are mounted on a support plate 106, and in particular, the optical pickup 105 is mounted so as to be movable in the radial direction of the optical disc 101. Support plate 106
Is a support shaft 10 whose one end surface is provided in the drive unit 104.
It is rotatably attached to the shaft 7, and the other end surface of the shaft 7 is rotated up and down via the support shaft 107. On the other hand, apart from the inserted tray 102, at the upper part,
A clamp mechanism 108 that holds the optical disc 101 placed on the tray 102 from above is provided. Also in the clamp mechanism 108, like the support plate 106, the clamp mechanism 108 is configured to rotate up and down via the support shaft 109.

When the tray 102 is pulled out from the insertion opening 103, or when the optical disk 101 is not placed on the tray 102 inserted in the drive unit 104, it is indicated by a chain double-dashed line in the figure. Thus, both the support plate 106 and the clamp mechanism 108
It is located in the direction away from. When the optical disc 101 is placed on the tray 102 and further inserted into the drive unit 104, as shown by the solid line in the figure, the support plate 1
06 and the clamp mechanism 108 rotate together in the direction of the tray 102, and the optical disc 101 on the tray 102 is moved.
Is rotatably held between the turntable 110 of the spindle motor M and the clamp mechanism 108. At this time, by operating a reproduction key (not shown), the turntable 110 rotates, the optical disc 101 rotates in one direction, and the optical pickup 105 causes the optical disc 1 to rotate.
By moving the optical disc 101 in the radial direction of 01,
The information signal recorded in is reproduced.

When the optical disk 101 is taken out from the drive section 104, the take-out key (EJECT key) 111 on the front panel of the drive section 104 is operated. That is, by operating the EJECT key 111, the switch 112 provided corresponding to the EJECT key 111 in the drive unit 104 is turned on, and based on the switch 112 being turned on, the rotational drive of the spindle motor M is stopped. After that, the support plate 106 and the clamp mechanism 108 rotate and move in the direction in which they are separated from the tray 102. Then, the tray 102 is pulled out from the insertion opening 103 by driving a slide mechanism using a motor (not shown) as a drive source.

In the above example, the support plate 106 on which the spindle motor M and the optical pickup 105 are attached is used as the spindle 1.
The optical disc 10 on the tray 102 is rotated on the turntable 110 of the spindle motor M via the optical disc 10 on the tray 102.
In the other example, as shown in FIG. 9, the spindle motor M and the optical pickup 105 are mounted on the mounting plate 113 that moves up and down in parallel.
Tray 10 on which the optical disc 101 is mounted
When 2 is inserted, the mounting plate 113 is translated in the direction of the tray 102, and the clamp mechanism 108 is further rotated in the direction of the tray 102 to rotate the spindle motor M.
It is also proposed that the optical disc 101 is rotatably held between the turntable 110 and the clamp mechanism 108.

[0009]

However, in the above-mentioned reproducing apparatus of the related art, as described above, the tray 102 on which the optical disk 101 is placed is pulled into the drive unit 104 via the slide mechanism, and the inside of the drive unit 104 is pulled. Since the optical disc 101 on the tray 102 is configured to be mounted on the spindle motor M stored in, the mechanism shown below is required at least.

That is, a mechanism for vertically moving the spindle motor M and the optical pink-up 105 (for example, in the reproducing apparatus shown in FIG. 8, a support plate 106 and the support plate 106).
Drive mechanism), a clamp mechanism 108, a mechanism for rotationally moving the clamp mechanism 108, a take-out key (EJECT key) 111 and its switch mechanism, and a motor for moving the tray 102 in and out of the drive section 104. A slide mechanism etc. is required.

These structures have complicated structures,
Further, since the accuracy is required, the manufacturing cost of the reproducing apparatus is increased and the size of the reproducing apparatus itself is increased.

The present invention has been made in view of the above problems, and an object thereof is to load a tray-shaped transfer body with a simple structure and to reduce the manufacturing cost of the apparatus itself. It is an object of the present invention to provide a recording and / or reproducing apparatus for a disk-shaped recording medium, which can be made compact and compact.

[0013]

According to the present invention, as shown in FIG. 1, a disk-shaped recording medium 3 is mounted, and a rotational driving means (spindle motor M) for rotationally driving the mounted disk-shaped recording medium 3. And a recording and / or reproducing unit (optical pickup 5) movable in the radial direction of the disk-shaped recording medium 3, and the tray-shaped transfer body 4 on which the disk-shaped recording medium 3 is placed records. And / or recording and / or reproducing of an information signal is performed by the recording and / or reproducing means 5 with respect to the disc-shaped recording medium 3 which is attached to the reproducing device main body 2 so as to be freely taken in and out and is placed on the transfer body 4. In the recording and / or reproducing apparatus, the transport body 4 is provided with the rotation driving means M.

In this case, in the portion (turntable 18) of the rotary drive means M where the disk-shaped recording medium 3 is mounted, FIG.
As shown in FIG. 6, a fitting body 21 fitted into the central hole 3 a (see FIGS. 6 and 7) of the disk-shaped recording medium 3 and the fitting body 21.
The disk-shaped recording medium 3 mounted in the portion 18 in which the disk-shaped recording medium 3 is mounted is arranged so as to be able to move forward and backward, and is biased by the elastic member 23 in a direction projecting outward of the fitting body 21. A self-clamping mechanism including a plurality of spherical members 24 pressed and supported on the side of the mounted portion 18 is provided.

In addition to the above structure, as shown in FIG. 2, a transfer body 4 is provided in the recording and / or reproducing apparatus main body 2.
The detection means 34 for electrically detecting the completion of the insertion and the withdrawal of the transfer body 4 is provided.

[0016]

In the recording and / or reproducing apparatus according to the present invention, when recording and / or reproducing the information signal on the disk-shaped recording medium 3, as shown in FIG. The disk-shaped recording medium 3 is mounted on the rotation driving means M of the disk-shaped recording medium 3, and then the transport body 4 is manually inserted into the recording and / or reproducing apparatus main body 2, for example. A recording and / or reproducing means 5 that is movable in the radial direction of the disk-shaped recording medium 3 is stored in the main body 2, and the inserted transport body 4 is on the recording and / or reproducing means 5. Will be located in. Then, the recording and / or reproducing means 5 moves in the radial direction of the disk-shaped recording medium 3 to record and / or reproduce the information signal on the disk-shaped recording medium 3 mounted on the rotation driving means M. Is done.

Therefore, since only the recording and / or reproducing means 5 is substantially stored in the main body 2, a mechanism for vertically moving the rotary driving means M as in the conventional case is not required. In particular, if the portion 18 of the rotation driving means M provided on the transfer body 4 on which the disk-shaped recording medium 3 is mounted is provided with a clamp mechanism 21 for self-clamping the disk-shaped recording medium 3, the disk-shaped body 2 is formed. It is not necessary to provide a clamp mechanism for holding the recording medium 3 from above and a rotation moving mechanism thereof.

If the recording and / or reproducing apparatus main body 2 is provided with a detection means 34 for electrically detecting the completion of insertion of the transfer body 4 and the withdrawal of the transfer body 4, the detection means 34 can be used. Rotation drive means M based on the detection signal
The disk-shaped recording medium 3 can be rotated and stopped by the recording / reproducing means 5, and the recording and / or reproducing means 5 can start and stop the recording and / or reproduction of the information signal to / from the disk-shaped recording medium 3. It is not necessary to provide an operation key such as a key dedicated to the transfer body 4.

[0019]

EXAMPLE An example of a recording and / or reproducing apparatus for a disk-shaped recording medium according to the present invention will be described below with reference to FIGS. 1 to 7. However, the disk-shaped recording medium is now in practical use. An embodiment of the present invention will be described with reference to a read-only optical recording medium (CD-ROM; hereinafter simply referred to as an optical disc). Therefore, the device applied to the driving is also referred to as a device dedicated to optical disc reproduction (hereinafter, simply referred to as a reproducing device).

As shown in FIG. 1, the reproducing apparatus according to this embodiment has a tray-shaped transfer body 4 which can be freely inserted into and taken out of the drive section 2 through an insertion opening 1 and on which an optical disk 3 is arranged. Have. An optical pickup 5 for optically detecting information recorded on the optical disc 3 and converting it into an electric signal is stored in the drive unit 2. As shown in FIG. 2, the optical pickup 5 is perpendicular to the track direction of the optical disc 3 by a guide shaft 8 and a rail 9 mounted on a chassis 6 of the drive unit 2 via a pair of mounting bases 7, respectively. It is supported so as to be movable in any direction (that is, the radial direction of the optical disk 3).

The guide shaft 8 has a thread on its surface, and is rotated by transmitting the rotational driving force of a drive motor (not shown) through a known gear train. Then, the optical pickup 5 is screw-fed in the direction toward the insertion opening 1 or in the direction away from the insertion opening 1 by the forward or reverse rotation of the guide shaft 8. In addition to the above, the moving mechanism of the optical pickup 5 may be configured by a linear motor.

On the other hand, on both outer sides of each mounting base 7, reference shafts 10 for the transfer body are provided adjacent to the mounting bases 7, respectively. It is for positioning with respect to the pickup 5 in a certain dimensional relationship, and is provided so as to extend parallel to the guide shaft 8 and to the insertion opening 1. Transport body 4
Is guided in a guide member (groove or rail) (not shown) extending from the insertion opening 1 to the back of the drive unit 2 in the drive unit 2 and the pair of reference shafts 10 so that the drive unit 2 can be freely taken in and out. ..

Further, stoppers 11 and 12 are integrally formed at both ends of each of the mounting bases 7. Among these stoppers 11 and 12, the stopper 11 on the back side of the drive unit 2 is
The movement of the optical pickup 5 and the transfer body 4 in the depth direction of the drive unit 2 is restricted. The stopper 12 on the insertion port 1 side restricts the movement of the optical pickup 5 to the insertion port 1 side. Therefore,
The movement range of the optical pickup 5 is restricted by the distance between the stopper 11 on one side and the stopper 12 on the other side.

Further, the transfer body 4 has each side slightly larger than the diameter of the optical disk 3 and a flat rectangular receiving plate 13 for ensuring the strength of the transfer body 4 itself, and this receiving plate 13. Blind plate 1 that rises upward on the end face of 13
4 and 4 are integrally formed of a material such as a synthetic resin. A rectangular opening 15 is formed in the receiving plate 13 from the end surface a on the drive unit side to the central portion. The opening 15 allows the laser beam L (see FIG. 1B) from the optical pickup 5 located below the transfer body 4 to pass through the opening 15 when the transfer body 4 is inserted into the drive unit 2. It is an opening for irradiating 3 or for escape.

In this embodiment, a circular opening is formed in the central portion of the receiving plate 13, and the spindle motor M is attached to this opening via a ring-shaped damper 16 (damping member). This spindle motor M is
For example, as shown in FIG. 1A, the drive shaft 17 has a turntable 18 on which the optical disc 3 is mounted. The spindle motor M is electrically connected by a flexible cable 19 to a drive circuit and a control circuit for driving a motor mounted on a printed wiring board (not shown) in the drive unit 2.

The turntable 18 is shown in FIGS.
As shown in FIG. 1, a shaft portion 18 a formed integrally with a material such as a synthetic resin and having a substantially cylindrical shape, and the shaft portion 1
On the outer peripheral side of the lower end side of 8a on the side of the spindle motor M, a substantially disk-shaped mounting plate portion 18 provided in a flange shape.
b and. A support hole 18 into which the drive shaft 17 of the spindle motor M is fitted is provided in the central portion of the shaft portion 18a.
c is provided. Further, a disc contact portion 18d formed of a ring-shaped ridge is provided on the peripheral portion of the upper surface of the placing plate portion 18b.

As shown in FIG. 4, a metal support ring 20 is provided on the inner surface of the support hole 18c to ensure the support of the turntable 18 by the drive shaft 17.
Are interposed and disposed between the drive shaft 17 and the drive shaft 17. The support ring 20 is attached to the turntable 18 by means such as insert molding.

The upper part of the turntable 18 is
That is, a centering member 21 that constitutes a self-clamp mechanism is attached to the upper end side of the shaft portion 3a, which is the tip end side of the drive shaft 1a. This centering member 2
Reference numeral 1 denotes a cap portion 22 fitted in a central hole 3a (see FIG. 6) for chucking provided in the central portion of the optical disc 3, and an elastic member housed and supported in the cap portion 22 O -It is composed of a ring 23 and three steel balls 24 serving as a plurality of spherical members.

The cap portion 22 is integrally formed of a material such as synthetic resin, and the turntable 1
8, a support portion 22a fitted to the outer peripheral side of the shaft portion 18a, a top plate portion 22b provided in a flange shape on the outer peripheral side of the upper end side of the support portion 22a, and the outer peripheral edge of the top plate portion 22b from the above-mentioned turn. The side wall portion 22c is provided so as to hang down on the table 18 side.

The outer peripheral surface of the side wall portion 22c has a substantially conical shape with its diameter reduced slightly toward the upper side, that is, toward the tip side of the drive shaft 17. As shown in FIG. 5, the side wall portion is formed such that the diameter D ₁ of the outer peripheral surface on the lower end side thereof is slightly smaller than the central hole 3a of the optical disc 3. A flange portion 22d is provided on the outer peripheral side of the lower end of the side wall portion 22c.

Then, three pairs of notches 25 are provided at intervals of approximately 120 degrees from the top plate portion 22b to the side wall portion 22c and the flange portion 22d. The supporting portion 22 is provided between the cut portions 25, 25 forming a pair.
The displacement portion 26 is elastically deformable in the contact / separation direction with respect to a. As shown in FIG. 5, the diameter (D ₂ ) of the circumscribing circle including the outer peripheral surface of the portion corresponding to the lower end side of the side wall portion 22c of each of these displacement portions 26 is slightly larger than that of the central hole 3a. Is formed.

When the cap portion 22 is attached to the turntable 18, the flange portion 22d is fitted into a ring-shaped groove portion 18e (see FIG. 3) provided on the upper surface side of the mounting plate portion 18b. It has become. Therefore, each of the displacement portions 26 can be displaced within a range in which the tip end portion forming a part of the flange portion 22d is fitted into the groove portion 18e and the tip end side moves in the groove portion 18e.

The O-ring 23 housed in the cap portion 22 is formed in a ring shape from a material such as synthetic rubber and is arranged so as to surround the support portion 22a. .. Each of the steel balls 24 comes into contact with the upper outer peripheral side of the O-ring 23 and is supported so as to be sandwiched between the O-ring 23 and the cap portion 22. Each steel ball 24 has a displacement portion 26,
They are arranged at intervals of 120 degrees so as to be located between 26.

The cap portion 22 is provided with through holes 27 corresponding to the steel balls 24 so that the steel balls 24 are exposed to the outside. These through holes 27 are formed in a slit shape extending from the top plate portion 22b to the side wall portion 22c, and in the top plate portion 22b, the top plate portion 2 is formed.
The side walls 22c are provided radially in the radial direction of 2b and are provided in the vertical direction extending from the upper end side to the lower end side of the side wall part 22c.

Further, each of the through holes 27 corresponds to the top plate portion 22.
In b, the width is narrower than the diameter of the steel ball 24, and in the side wall portion 22c, the width is substantially equal to the diameter of the steel ball 24. Then, on the lower surface portion of the top plate portion 22b, a pair of inclinations formed on both sides of each of the through holes 27 in the top plate portion 22b so as to open downward in a tapered shape from the through holes 27. The portion 27a is provided. The lower side of the inclined portion 27a is continuous with the inner edge of the through hole 27 in the side wall portion 22c.

The steel balls 24 are in contact with the inclined portions 27a so as to be sandwiched between the pair of inclined portions 27a in the cap portion 22.
Therefore, as shown by the arrow A in FIG. 3, the steel ball 24 has the top plate portion 22 along the pair of inclined portions 27a.
It is movable in the radial direction of b. The flange portion 22b of the cap portion 22 is provided with three locking protrusions 28 so as to face the through holes 27. These locking projections 28 have their tip portions 28a brought into contact with the steel balls 24, so that the cap portions 2 of the steel balls 24 are abutted.
The movement of 2 toward the outside is regulated. The tip portion 28a
Is formed into a concave spherical surface corresponding to the steel ball 24.

The steel balls 24 have the O-rings 23,
The pair of inclined portions 16a and the tip end portion 28a of the locking projection 28 are positioned and supported. Each of the steel balls 24 thus positioned is provided with approximately 30% of the diameter on the outer side of the side wall portion 22c through the through hole 16.
Approximately 50% is projected. At this time, as shown in FIG. 5, each steel ball 24 has a diameter (D ₃ ) of a circumscribing circle including a portion on the outer side of the steel ball 24 is equal to the central hole 3a.
It is positioned so that it has a larger diameter. And
When the steel balls 24 are moved toward the inner side of the cap portion 22, that is, in the direction of approaching the shaft portion 22a, the O
Since the O-ring 23 is elastically deformed by pressing the ring 23, the O-ring 23 is urged in a direction projecting outward of the cap portion 22.

In order to mount the optical disk 3 on the turntable 18 having the centering member 21 constructed as described above, as shown in FIG. 21 is externally fitted. At this time, the inner side portion of the central hole 3a is, as shown in the figure, the side wall portion 2 of each of the steel balls 24.
2c is abutted on a portion protruding outward from 2c, and these steel balls 24
Is moved to the inner side of the cap portion 22 as indicated by an arrow C in the figure. Then, these steel balls 24 are
Elastically deform the ring 23;

When the optical disc 3 is moved so as to be closer to the turntable 18 and placed on the turntable 18, the central hole 3 of the optical disc 3 is moved.
As shown in FIG. 7, the inner portion of a is between the turntable 18 and a portion of the steel balls 24 that protrudes outward from the side wall portions 22c of the steel balls 24 while being in contact with the steel balls 24. Will be located in. At this time, the steel balls 24
Touches the upper edge of the inner portion of the central hole 3a.
Therefore, the O-ring 23 has the upper edge portion of the inner portion of the central hole 3a through the steel balls 24, as shown by an arrow D in FIG. Press diagonally downward. That is, the O-ring 23 not only centers the optical disc 3 with respect to the drive shaft 17 but also presses and supports the turntable 18.

At this time, each of the displacement parts 26 (see FIG.
And FIG. 5) are elastically displaced to the inner side of the cap portion 22 by the contact of the inner portion of the central hole 3a. Therefore, these displacing portions 26 are arranged in the central hole 3
By pressing the inner part of a, the optical disk 3 is moved to the drive shaft 1
Center on 7.

In this way, the optical disk 3 is positioned and mounted on the turntable 18 by the centering member 21 constituting the self-clamping mechanism,
When the spindle motor M rotates the drive shaft 17, the optical disk 3 is rotationally driven together with the turntable 18. In the above example, the steel ball 24 is set to 3
Although an example in which four steel balls 24 are used is shown, of course, four or more steel balls 24 may be used. In this case, four or more through holes 27 are provided corresponding to the number of steel balls 24. Also, four or more displacement parts 26 are provided.

Next, as shown in FIG. 2, the blind plate 14 integrally formed on the end surface of the transfer body 4 so as to rise upward has a pair of concave portions 31 formed on the front side thereof. .. The recess 31 has a size such that the operator's finger can be inserted therein. Then, when the transfer body 4 is inserted into the drive unit 2 or pulled out from the drive unit 2, a finger is inserted into the recess 31 of the blindfold plate 14 and is manually performed directly.

Further, a switch pressing projection 32 and a pair of elastic hook-shaped projections 33 are integrally formed in the vicinity of the side surface of the transfer body 4 on the end surface a on the drive portion side of the transfer body 4. In the illustrated example, the protrusion 32 is formed in the vicinity of the left side surface of the drive unit side end surface a of the transfer body 4, and the pair of hook-shaped protrusions 33 is formed in the vicinity of the right side surface.

On the other hand, in the chassis 6 of the drive unit 2, a switch 34 is provided at a position facing the protrusion 32 of the transfer body 4 when the transfer body 4 is inserted into the drive unit 2.
An arcuate projection 35 is provided at a position facing the pair of hook-shaped projections 33. Further, an arcuate holder 37 for fixing the spindle motor M is provided at the end of the mount 7 on the insertion opening side via a pair of arms 36. Therefore, when the transfer body 4 is inserted into the drive unit 2, the arc-shaped projection 35 is fitted into the recess 38 formed by the pair of hook-shaped projections 33, and the drive unit side end portion a of the transfer body 4 is inserted.
Contacts the end surface of the stopper 11. At this point, the transfer body 4
Insertion is completed. Further, at this time, the switch 34 is turned on by the pressing by the protrusion 32, and it is electrically detected that the transfer body 4 is inserted into the drive unit 2.

The pair of hook-shaped projections 33 and arc-shaped projections 3
No. 5 is not necessarily provided, but since the transfer body 4 is directly put in and taken out from the drive unit 2 by hand, when the transfer body 4 is inserted into the drive unit 2, the force applied to the transfer body 4 is too large. As a result, the stopper 11 may be damaged. Therefore, by providing the pair of hook-shaped projections 33 and the arc-shaped projection 35, the tips of the pair of hook-shaped projections 33 and the arc-shaped projection 35 are provided before the end surface a of the transfer body 4 contacts the stopper 11.
The front end of the contact member comes into contact, and the operator can know in advance that the insertion of the transfer body 4 is approaching due to the repulsive force based on the contact.

That is, when the completion of the insertion of the transfer body 4 is approaching, the operator can temporarily stop the insertion of the transfer body 4 or weaken the force applied to the operation, and then the operator can make a selection. By slightly applying a force to the transfer body 4 in the insertion direction, the arc-shaped projection 35 is fitted into the recess 38 formed by the pair of hook-shaped projections 33, and the end surface a of the transfer body 4 is located on the end surface of the stopper 11. The contact is made and the insertion of the transfer body 4 is completed. In this case, since the transfer body 4 is not rapidly inserted, the inconvenience that the stopper 11 is damaged as described above does not occur.

When the information recorded on the optical disk 3 is reproduced by the reproducing apparatus according to this embodiment,
First, the transfer table 4 is mounted on the turntable 18 of the spindle motor M provided at the central portion of the transfer body 4 via the damper 16 via the self-clamping mechanism (centering member 21). After that, a finger is inserted into the concave portion 31 provided in the blind plate 14 of the transfer body 4, and the transfer body 4 is directly inserted into the drive unit 2 manually. Then, the completion of insertion of the transfer body 4 is detected by the switch 34, and this detection signal is supplied to a drive circuit and a control circuit (not shown) of the spindle motor M and a drive circuit and a control circuit (not shown) of the optical pickup 5.

After that, the reproduction on the optical disk 3 is performed by operating a reproduction key (not shown). That is, when the reproduction key is pressed, the signal from the reproduction key is transmitted to the drive circuit and control circuit of the spindle motor M.
Also, the drive circuit and the control circuit of the optical pickup 5 are driven and controlled by the drive circuit and the control circuit of the spindle motor M based on the signal from the reproduction key and the detection signal from the switch 34. , The optical disc 3 mounted on the turntable 18
Is driven to rotate in one direction. And in this state,
By moving the optical pickup 5 in the radial direction of the optical disc 3, the information signal recorded on the optical disc 3 is reproduced.

Next, when taking out the optical disk 3, the transfer body 4 may be directly pulled out manually. That is, when the transfer body 4 is pulled out from the drive unit 2, the switch 34 is turned off, and the off signal from the switch 34 is transmitted to the drive circuit and control circuit of the spindle motor M and the drive circuit and control circuit of the optical pickup 5. Based on the supply of the OFF signal, the reproduction operation by the optical pickup 5 is stopped and the rotation of the optical disk 3 by the spindle motor M is stopped. Therefore, when the transfer body 4 is completely pulled out from the drive unit 2, the rotation of the optical disc 3 is completely stopped,
The operator can easily take out the optical disc 3 from the transport body 4.

As described above, according to the reproducing apparatus of the present embodiment, the spindle motor M for rotating the optical disc 3 is provided on the transfer body 4, so that the drive unit 2 includes:
Substantially only the optical pickup 5 is stored, and a mechanism for moving the spindle motor M up and down in the drive unit 2 is unnecessary. Particularly, in the case of the present embodiment, since the centering member 21 for self-clamping the optical disc 3 is provided on the turntable 18 of the spindle motor M, the clamping mechanism for holding the optical disc 3 from above in the drive unit 2 and the same. It is not necessary to provide a rotation moving mechanism. Further, since the spindle motor M is attached to the transfer body 4 via the ring-shaped damper 16, the spindle motor M can be firmly attached to the transfer body 4. At the same time, since the vibration from the spindle motor M is absorbed by the damper 16, it is possible to prevent the generation of abnormal noise due to unnecessary vibration of the transfer body 4.

A switch 3 for electrically detecting the completion of insertion of the transfer body 4 and the withdrawal of the transfer body 4 in the drive unit 2.
4 is provided, the spindle motor M causes the optical disk 3 to rotate and its rotation stop, and the optical pickup 5 causes the optical signal to be reproduced and stopped on the optical disk 3 based on the detection signal from the switch 34. Therefore, it is not necessary to provide an operation key such as an EJECT key dedicated to the transfer body 4.

As described above, the reproducing apparatus according to the present embodiment is
A mechanism for vertically moving the spindle motor M, a mechanism for clamping the optical disk 3 on the transfer body 4 from above, a EJECT key, and a circuit system and a drive system related to the EJECT key (the drive section for the transfer body 4 is a drive unit) 2, a slide mechanism that can be freely taken in and out, etc.) is not required, so that the structure of the drive unit 2 and the structure of the reproducing apparatus are simplified. In particular, since a mechanism for vertically moving the spindle motor M and a mechanism for clamping the optical disc 3 on the transfer body 4 from above are not required, a space for accommodating these mechanisms in the drive unit 2 is not needed, The size of the playback device in the height direction can be reduced.

In the above-mentioned embodiment, the example in which the invention is applied to the read-only optical disk 3 is shown, but of course, a rewritable optical recording medium, or other magneto-optical recording medium capable of rewriting by optical modulation or magnetic field modulation. Can also be applied to.

[0054]

As described above, according to the recording and / or reproducing apparatus for the disc-shaped recording medium of the present invention, the disc-shaped recording medium is mounted and the mounted disc-shaped recording medium is rotationally driven. Rotation driving means and recording and / or reproducing means movable in the radial direction of the disc-shaped recording medium, and the transport body on which the disc-shaped recording medium is mounted is a recording and / or reproducing device. In the reproducing apparatus for recording and / or reproducing the information signal by the recording and / or reproducing means with respect to the disc-shaped recording medium mounted on the main body so as to be freely inserted and taken out, Since the above-mentioned rotation driving means is provided in the main body, a mechanism for moving the rotation driving means up and down in the main body is not required, the structure of the apparatus itself can be simplified and downsized, and the manufacturing cost can be reduced. Realization It can be.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a main part of a tray type optical disc reproducing apparatus according to the present invention, in which FIG. 1A shows a state in which a tray-shaped transfer body is pulled out, and FIG. 1B shows a state in which the transfer body is inserted. Indicates.

FIG. 2 is a plan view of a main part showing a tray type optical disc reproducing apparatus according to the present invention.

FIG. 3 is an exploded perspective view showing a self-clamping mechanism according to the present invention.

FIG. 4 is a vertical sectional view showing a self-clamping mechanism according to the present invention.

FIG. 5 is a plan view showing a self-clamping mechanism according to the present invention.

FIG. 6 is a longitudinal sectional view showing a state (insertion process) in which an optical disc is inserted in the self-clamp mechanism according to the present invention.

FIG. 7 is a vertical cross-sectional view showing a state in which an optical disc is mounted on the self-clamp mechanism according to the present invention.

FIG. 8 is a configuration diagram of essential parts showing a tray-type optical disk reproducing device according to a conventional example.

FIG. 9 is a configuration diagram of a main part showing a tray type optical disk reproducing device according to another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insertion port 2 Drive part 3 Optical disk 4 Tray-like transfer body 5 Optical pickup M Spindle motor 16 Damper 17 Drive shaft 18 Turntable 21 Centering member 23 O-ring 24 Steel ball 32 Switch projection 34 Switch 34

Claims (3)

[Claims] 1. A disk-shaped recording medium is mounted, and a rotation driving means for rotating and driving the mounted disk-shaped recording medium, and recording and / or reproduction capable of moving in the radial direction of the disk-shaped recording medium. And a tray-shaped transfer body on which the disc-shaped recording medium is placed, the unit being removably attached to the recording and / or reproducing apparatus main body, and the disc-shaped recording medium placed on the transfer body. On the other hand, in the recording and / or reproducing apparatus for recording and / or reproducing the information signal by the recording and / or reproducing means, the disk-shaped recording is characterized in that the rotary drive means is provided on the transport body. Media and / or playback device. 2. A center hole is provided in the disc-shaped recording medium, and a fitting body which fits in the center hole of the disc-shaped recording medium is provided in a portion of the rotation driving means where the disc-shaped recording medium is mounted. The fitting member is arranged so as to be able to move forward and backward, and is biased by an elastic member in a direction projecting outward of the fitting member.
A self-clamping mechanism including a plurality of spherical members for pressing and supporting the disk-shaped recording medium mounted on the disk-shaped recording medium mounting portion is provided. 2. A disc-shaped recording medium according to claim 1, and / or a reproducing device. 3. In the main body of the recording and / or reproducing apparatus,
3. A disk-shaped recording medium and / or reproducing apparatus according to claim 1, further comprising detection means for electrically detecting completion of insertion of the transfer body and withdrawal of the transfer body.