JP3295969B2 - Disc playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc reproducing apparatus such as an LV (Region Vision Disc) player and a CD (Compact Disc) player, and relates to a process from the time when a tray is stored in the main body of the reproducing apparatus to the time when reproduction is started. It is a time reduction.

[0002]

2. Description of the Related Art In a disk reproducing apparatus such as an LV player or a CD player, when a tray is stored in a main body of the reproducing apparatus, it is determined whether or not a disk is present, and the apparatus is shifted to a reproduction standby state (for example, positioning of an optical pickup).

Conventionally, the presence / absence of a disc is determined from the presence / absence of an output signal of an optical pickup or a tilt sensor output signal after a tray is accommodated in a reproducing apparatus main body and a disc clamping operation is performed.

[0004]

According to the conventional disk reproducing apparatus, after the tray is housed in the main body of the reproducing apparatus and the disk clamping operation is completed, it is determined whether or not a disk is present, and the apparatus is shifted to a reproduction standby state. However, there is a disadvantage that it takes a long time from the tray storage to the start of the reproduction because the reproduction is started.

An object of the present invention is to solve the above-mentioned problems in the prior art and to provide a disk reproducing apparatus in which the time from tray storage to the start of reproduction is reduced.

[0006]

SUMMARY OF THE INVENTION The present invention, reproduction apparatus main body to housing, a tray portion to be discharged, the large-diameter disk <br/> configured to hold a large-diameter disk on the tray portion And a rotating unit rotatably disposed on the tray unit.
Around the center of rotation of the turntable and this turntable.
Configured on the rotary table to hold a diameter disc
A plurality of small-diameter disk holding portions, a large-diameter disk presence / absence detection hole formed within the range of the large-diameter disk holding portion of the tray portion, and a communication with the large-diameter disk presence / absence detection hole.
With a large-diameter disk
A non-detection hole, and a light emitting means disposed at a position where the large-diameter disk presence / absence detection hole is passing through the tray portion in the middle of the reproducing apparatus when the large-diameter disc presence / absence detection hole is located, and the light-emitting means is opposed to the upper and lower positions of the tray portion. and light receiving means and said rotary Te
Cable out of the range of the small-diameter disc holding portion.
State in which the tray section is accommodated in the playback apparatus main body.
When the rotary table is rotated in the light emitting means and
Table rotation configured at the position where the optical axis of the light receiving means passes
Communication with the shift position detection hole and the table rotation position detection hole.
Table rotation position detecting means
And Deana, and the large-diameter disk whether discrimination means for discriminating the presence or absence of the large-diameter disk in the large-diameter disk holding portion by the light receiving output of the way by the light receiving means for the tray portion is a storing operation, the large-diameter disk and standby operation command means for detecting means to direct the standby operation for reproducing the large-diameter disk when it is determined that there is a large diameter disk <br/> click, the tray unit is housed in the reproduction apparatus main body Condition
In this state, the rotation of the rotary table is
And a table rotation position detecting means for detecting a rotation position .

[0007]

[0008]

According to the present invention, during the tray storage operation,
Since the standby operation can be commanded by determining the presence or absence of the large-diameter disk, the time from the storage of the tray unit to the start of reproduction can be shortened.

As a disk reproducing apparatus, a rotary table is rotatably provided on a tray, and a plurality of small-diameter disks are mounted around a center of rotation on the rotary table so that they can be continuously reproduced. 2. Description of the Related Art A changer type disk reproducing apparatus (for example, a CD changer) has conventionally existed. When configuring this to have a large diameter disk playback functions LV or the like as the compatible player, in addition to the determination of the presence or absence of the large diameter disk, it is necessary to detection of the rotational position of the rotary table for small disc playback. Conventionally, the rotation position of the rotary table was detected by a mechanical sensor disposed on the tray. However, this requires a sensor separately from the presence or absence of the large-diameter disk, and a signal from the rotation position detection sensor. Since the wire is drawn out of the tray portion which is a movable portion, there is a problem that the routing is troublesome.

[0010] Therefore, according to the present invention, in the middle housing of the tray portion with the light emitting means and light receiving means in addition to determining whether or not the large-diameter disk, after storage of the tray portion with the light emitting means and light receiving means Thus, the rotational position of the rotary table is detected. According to this configuration, the number of sensors can be reduced because the sensor is also used for determining the presence or absence of the large-diameter disk and detecting the rotational position of the rotary table. Further, since the sensor comprising the light emitting means and the light receiving means is provided in the main body of the reproducing apparatus and is not provided in the tray section, it is necessary to draw out the signal line of the sensor from the tray section which is a movable section. And it can be easily routed.

[0011]

An embodiment of the present invention will be described below. In this embodiment, a case will be described in which the present invention is applied to a compatible player in which a CD is a small-diameter disc, an LV is a large-diameter disc, and an LV playback function is added to a CD changer.

FIG. 1 shows a plane structure and a side structure of a compatible player to which the present invention is applied, with a tray portion 31 in a discharged state. Also, the tray unit 31
FIG. 2 shows a planar structure and a side structure when an LV is reproduced by storing the. The tray section 31 is indicated by arrows A and A 'in FIG.
And is stored in the reproducing apparatus main body 32 and discharged. The tray section 31 is configured such that a rotary table 34 is rotatably arranged on the tray 30.

FIG. 3 shows the structure of the tray section 31. The tray 30 is formed in a square shape, and has a substantially circular concave portion 36 that rotatably accommodates the turntable 34. An opening 38 is formed at the center of the recess 36. An opening 40 is formed in the radial direction of the recess 36.
In addition, a rotary table driving mechanism disposed in the main body of the reproducing apparatus is inserted into a part of the concave portion 36 to rotate the rotary table 3.
An opening 45 for rotationally driving the motor 4 is formed.
Further, an LV presence / absence detection hole 42 and a table rotation position detection hole 44 are formed at predetermined positions of the concave portion 36. On the lower surface of the tray 30, a loading gear 80 (FIG. 1) is formed.

The rotary table 34 is formed in a substantially circular shape.
Notches 46 and 48 are formed on both left and right sides, and the width direction is formed narrower than its diameter. Tray 30
Is formed to be substantially the same as the width of the turntable 34, whereby the width of the tray 30 is formed to be narrower than the diameter of the turntable 34.

At the center of the turntable 34, a tray 30 is provided.
An opening 50 is formed which communicates with the upper opening 38 and forms an LV turntable insertion opening. Opening 3
8 and the opening 50, the turntable 34
Is rotatably supported on the tray 30. On the lower surface of the rotary table 34, a table rotary gear 78 (FIG. 1) is formed around its rotation center.

Around the center of rotation of the rotary table 34,
Five CD holding portions 51 to 55 are formed. Each CD
12 cm CD holding groove 56 and 8 cm C
D holding grooves 58 are respectively formed. In addition, each C
The D holding portions 51 to 55 are respectively formed with openings 60 which communicate with the openings 40 on the tray 30 to form a CD turntable insertion opening and a CD pickup opening.

Further, the rotary table 34 is formed with an LV holder 62 in a range around the center of rotation and partially overlapping the CD holders 51-55. The LV holding portion 62 is formed with a 30 cm LV holding groove 64 and a 20 cm LV holding groove 66. Grooves 56, 5 of CD holding part 51
8 and the grooves 64, 66 of the LV holding portion 62 are 58, 56, 6
The height is sequentially increased in the order of 6, 64, whereby the LV holding unit 6 holds the CD in the CD holding unit 51.
2 can hold the LV.

The rotary table 34 has CD holding units 51, 5
5, an opening 68 is formed which communicates with the opening 40 on the tray 30 and constitutes an LV optical pickup opening. As described above, the LV turntable insertion opening 50 and the LV optical pickup opening 68 are formed at positions where the CD holding portions 51 to 55 are removed.
While holding D in each of the CD holding units 51 to 55, L
V can be played.

At a predetermined position of the turntable 34,
An LV that detects the presence or absence of an LV by communicating with the hole on the tray 30 when the turntable is at a predetermined rotation reference position.
The presence / absence detection hole 70 is formed at a position inside the 20 cm LV groove 66 and outside the CD holding portions 51 to 55.
The rotary table 3 communicates with the hole 44 on the tray 30.
Table rotation position detection holes 71 to 71 for detecting the rotation position of No. 4
76 are located at the same distance from the table rotation center and outside the 30 cm LV groove 64 and the CD holding portions 51 to
55 are formed at positions deviating therefrom. The hole 71 among the table rotation position detection holes 71 to 76 is the CD holding unit 5.
3 is detected at the CD reproduction position. Similarly, hole 72
The hole 73 detects that the CD holding unit 55 is at the CD reproducing position, the hole 73 detects that the CD holding unit 51 is at the CD holding unit 51, and the hole 76 detects that the CD holding unit 52 is at the CD reproducing position. The hole 74 detects that the rotary table 34 is at a predetermined rotation reference position (the left and right notches are aligned with the width direction of the tray 30 (that is, the state shown in FIGS. 1 and 2). Holes 71-7
Unlike 3,75,76, it is configured as a hole with a two-part structure. The rotation table 34 is rotatable only when the tray 31 is stored in the main body of the playback apparatus.
When the tray 31 is discharged, the turntable 34 is returned to its rotation reference position and discharged. In a state where the tray section 31 is discharged, the rotation of the turntable 34 is locked by, for example, an electrically driven lock mechanism, and cannot be rotated.

Next, the configuration inside the playback apparatus main body 32 of FIG. 1 will be described. A mechanical base 84 is fixed to a bottom portion 82 in the playback device main body 32. A loading motor 86 is attached to the mechanical base 84, and drives the pulley 88, the belt 90, the pulley 92, and the gears 94, 96, 98.
Tray 3 via the driving force transmitting means 100 in which
0, the tray portion 31 is moved in the directions of arrows A and A 'to be stored.
Is discharged.

The mechanical base 84 includes a mechanical chassis 102.
Is mounted so as to be able to move up and down freely, and a disk clamp is performed by this elevating operation. Further, a pickup base 104 is attached to the mechanical chassis 102 so as to be tiltable, and a tilt operation at the time of LV reproduction is performed by the tilting operation. Slide cams 106 and 108 are held on both side surfaces of the mechanical base 84 so as to be slidable in the front-rear direction (arrows B and B 'directions).

A disk clamp and tilt motor 110 is fixed on the mechanical base 84, and its driving force is transmitted by a pulley 112, a belt 114, a pulley 116, a gear 11
Driving force transmitting means 124 combining 8, 120 and 122
To the gears 126, 128 formed on the slide cams 106, 108 via the
08 is slid in the direction of arrow B to realize the above-described disc clamping operation and tilt operation.

A table rotation motor 138 is fixed on a mechanical base 84 at the back of the main body 32 of the reproducing apparatus.
The driving force of this motor 138 is
42, a pulley 144, and gears 146, 148, 150 are sequentially transmitted to a driving force transmitting means 152.

An LV spindle motor 130 is fixed to the mechanical chassis 102, and an LV turntable 132 is attached to the motor shaft. Above the LV turntable 132, an LV clamper 134 is fixed to the chassis 136. Pickup base 10
4, a feed shaft 164 is fixed, and CD, L
A V-shared optical pickup 154 and a CD spindle motor 156 are slidably mounted. Motor 156
A CD turntable 158 is attached to the motor shaft. Above the CD turntable 158, a CD clamper 160 is provided in a state supported by the clamp arm 162. The position clamped by the clamper 160 is the CD reproduction position. The clamp arm 162 is attached to the mechanical base 84 so as to be rotatable around the rotation shaft 166 in the directions of arrows C and C ', and this rotation moves the CD clamper 160 between a clampable state and a non-clampable state.

In the vicinity of the tray outlet in the reproducing apparatus main body 32, light-emitting elements 168 are provided above and below the tray 31.
And the light receiving element 170 are opposed to each other. Its optical axis 17
2 is an LV detection hole 4 during the storage operation of the tray unit 31.
2 and 70, and after the storing operation of the tray unit 31 is completed, the position is set so as to pass through the table rotation position detection holes 44 and 71 to 76.

FIG. 4 is a perspective view showing a detailed structure of the pickup base 104 shown in FIG. 1 and a mechanism for disc clamping and tilting operations (only the front side is shown, and the other side has the same structure).

The mechanical base 84 is fixed inside the reapparatus main body. A mechanical chassis 102 to which an LV spindle motor 130 is fixed and a pickup base 104 are arranged inside the mechanical base 84, and a slide cam 108 is arranged outside a side surface portion 84 a of the mechanical base 84, and guide screws 174, 176, 178 are integrally connected. The position of the pickup base 104 is inclined slightly downward toward the outer periphery. The slide cam 108 slides in the directions of arrows B and B 'by driving the disc clamp and tilt motor 110 shown in FIG.

The slide cam 108 has cam grooves 180,
182, 184 are formed. The cam groove 180 is formed obliquely halfway, and a horizontal portion 180a is formed thereon. The same applies to the cam groove 182. The entire cam groove 184 is formed obliquely. Side part 8 of mechanical base 84
4a, vertical cam grooves 186, 188, 190 are formed at positions corresponding to the respective cam grooves 180, 182, 184. The guide screw 174 is provided in the cam groove 180, 1
The screw 86 is screwed into the screw hole 192 of the mechanical chassis 102. The guide screw 176 is connected to the cam grooves 182, 1
88, which is screwed into a screw hole 196 of the pickup base 104 through a hole 194 formed in the mechanical chassis 102. The guide screw 178 is connected to the cam grooves 184, 190
Through the screw hole 198 of the pickup base 104. Note that arrows E, F, and G in FIG.
(A), (b) and (c) respectively show.

The pickup base 104 has an opening 20.
0 is formed, and the feed shaft 164 is fixedly disposed therein. An optical pickup 154 and a motor base 202 are slidably attached to the feed shaft 164.
The motor base 202 has a CD spindle motor 156.
Is attached.

An optical pickup feed motor 204 is attached to the lower surface of the pickup base 104. The driving force is transmitted to a gear 220 formed on a side surface of the optical pickup 154 through a driving force transmitting unit 218 including a combination of a pulley 206, a belt 208, a pulley 210, and gears 212, 214, and 216. Slide along the feed axis 164.
An objective lens 222 for emitting a reproduction laser beam and a tilt sensor 224 are provided above the optical pickup 154.
Are arranged.

On the lower surface of the pickup base 104, C
A motor 226 for moving the spindle motor for D and for moving the CD clamper is mounted. The driving force is transmitted to a rack gear 236 formed on the side surface of the rod 234 via a driving force transmitting means 238 including a worm 228 and gears 230 and 232. The rod 234 is guided by a guide member (not shown) by this driving force,
It moves in the directions of arrows H and H '. The motor base 202 is connected to the rod 234 via a connecting portion 240, and the movement of the rod 234 causes the CD spindle motor 156 to slide on the feed shaft 164.

The tip of the rod 234 is the clamp arm 1
62 abuts. As shown in FIG. 6, the clamp arm 162 is urged in the direction of arrow C by a spring 242, and by moving the rod 234 in the direction of arrow H, the clamp arm 162 rotates in the direction of arrow C to move the clamper 160. The CD arm can be clamped, and the rod 234 is moved in the direction of arrow H 'to thereby clamp the arm 1.
Numeral 62 turns in the direction of arrow C 'to make CD clamping impossible.

The mechanism of FIG. 4 operates as follows. By driving the disk clamp and tilt motor 110 (FIG. 1) to slide the slide cam 108 in the direction of arrow B, the cam grooves 180, 182, 184 and the cam grooves 186, 1
88, 190 and the guide screw 17 inserted therein.
4, 176, 178, the mechanical chassis 102
And the pickup base 104 moves upward. At this time, the pick-up base 104 moves upward in an oblique posture. When the guide screws 174 and 176 reach the upper ends of the oblique portions of the cam grooves 180 and 182,
The movement of the mechanical chassis 102 stops. Further, when the slide cam 108 is slid in the direction of arrow B, the guide screw 178 moves upward,
4 rotates around the guide screw 176 as a fulcrum. At this time, since the guide screws 174 and 176 move on the horizontal portions 180a and 182a of the cam grooves 180 and 182, the mechanical chassis 10
The posture of 4 does not change. This pickup base 104
The tilt operation is realized during the LV reproduction by the rotation operation of. During CD reproduction, the slide cam 108 is slid in the direction of arrow B and held until the pickup base 104 is in a horizontal state.

The motor 226 is connected to the rod 2 during LV reproduction.
34 in the direction of arrow H 'to turntable 158.
Is retracted outward to a position where it does not collide with the LV. At this time, the clamp arm 162 also retracts upward due to the contact of the rod 234. During CD playback, the rod 234 is moved in the direction of arrow H to move the turntable 158 to a predetermined CD playback position. At this time, the clamp arm 162 is also returned to the predetermined clamp position. Optical pickup 154
Moves along the feed axis 164 so that the entire range of LV and CD can be traced.

Next, a description will be given of a control operation in the above-described compatible player from when a tray section storage instruction is given to when reproduction is started. FIG. 7 shows an example of a system configuration for this control. When the tray open / close button 250 on the main body panel or the remote controller is pressed while the tray unit 31 is being discharged, the system controller 252 issues a tray storage command and issues a tray storage instruction. The unit 31 is stored. The light receiving means 170 detects the presence or absence of the LV during the storage. The end of the tray storage operation is detected by a tray close end detection sensor 254 such as a limit switch. After the tray section is stored, the light receiving means 170 detects the rotation position of the turntable. If the system controller 252 detects the presence of an LV while
A standby command for V playback is issued, and if no LV is detected, a standby command for CD playback is issued to shift the optical pickup position and CD spindle motor position to respective standby states. Accordingly, if the disc clamp is started after the tray unit is stored and the play button 256 is pressed, the reproduction can be started immediately after the disc clamp is completed. In the case of CD reproduction, a table rotation command is issued after the tray unit is stored, and when a predetermined table rotation position is detected, the disk is clamped and reproduction is started.

FIG. 8 shows an example of a control flow by the system controller 252 for performing the above control. Tray open / close button 2 from the tray discharge state
When the user presses 50, a tray section storage command is issued (S1),
The motor 86 (FIG. 1) is driven to start the tray section storing operation (S2).

The hole 4 on the tray 31 during the storing operation
It is detected whether a light receiving signal is obtained from the light receiving element 170 through the light receiving elements 2 and 70 (S3). If there is no light receiving signal, it is determined that the LV is mounted and an LV standby command is issued (S4). Thereby, the motor 226 (FIG. 4)
Is driven, the rod 234 moves in the direction of the arrow H ', and the CD spindle motor 156 and the CD clamper 1 are moved.
60 is retracted to a position where it does not collide with the LV, and the optical pickup 154 is fed to the outermost circumferential position,
The playback standby state is set.

When the storage end of the tray 31 is detected (S5), a disc clamp command is issued (S6).
As a result, the motor 110 (FIG. 1) is driven to raise the mechanical chassis 102 (FIG. 4), and the LV is pulled up from the tray 31 by the turntable 132 and clamped by the clamper 134. FIG. 9A shows the state at this time.
Shown in If there is a reproduction command (S7), reproduction is started (S7).
8) If there is no reproduction command, the operation is stopped (S9). Since the LV playback standby operation has been started from the middle of the storage of the tray unit 31, the LV 25 is immediately activated after the storage of the tray unit.
8 can be started.

During the LV reproduction, the rotary table 34 is at the rotation reference position (at this time, the opening 68 is at the CD reproduction position).
Even if a CD is held in the CD-ROMs 1 to 55, the LV turntable 132 and the pickup 164 are not used in the CD holding units 51 to 5.
5, and the LV 258 can be reproduced with the CD 260 remaining on the turntable 34 as shown in FIG.

If a light receiving signal is obtained from the light receiving element 170 while the tray is being stored, it is determined that a CD is mounted, and a CD standby command is issued (S9). This allows
The motor 226 (FIG. 4) is driven, the rod 234 moves in the direction of arrow H, the CD spindle motor 156 moves to a predetermined CD playback position, and the CD clamper 160
The optical pickup 154 is set to the D-clamp position, and the optical pickup 154 is fed to the outermost position to be in the CD reproduction standby state (or, every time the tray portion is discharged, the CD reproduction standby state is steadily returned to and the LV detection is performed). It is also possible to shift to the LV reproduction standby state only at the time.

When it is detected that the storage of the tray has been completed (S1)
0), a table rotation command is issued (S11). In the state where the storage of the tray portion is completed, the table rotating gear 150 in the reproducing apparatus is inserted through the opening 45 (FIG. 4) of the tray 30 and meshes with the gear 78 on the lower surface of the rotary table 34 ( By rotating the motor 138, the turntable 34 is rotated. Then, the positions of the holes 71, 72, 73, 75, 76 from the table reference position 74 are counted based on the light receiving signal of the light receiving element 170, and the table rotation position programmed or specified manually by the manual operation is detected. Then, the table rotation is stopped (S12, S13).

The table reference position is detected by utilizing the fact that the hole 74 at the table reference position has a two-part structure unlike the other holes 71 to 73, 75 and 76, and the time interval of the light receiving signal is detected. Can be performed. That is, as shown in FIG. 10, when the rotary table 34 is rotated at a constant speed, the time interval of the light receiving signal is normally A, but becomes shorter as B when passing through the hole 74. Therefore, a certain reference value longer than B and shorter than A is set,
If the rise (or fall) time interval of the light receiving signal is detected to be shorter than this reference value, the position is detected as the table reference position.

When the rotation of the table is stopped, a disc clamp command is issued (S6). Thereby, the motor 11
0 (FIG. 1) is driven to raise the mechanical chassis 102 (FIG. 4), and the CD at the CD reproduction position is pulled up from the tray section 31 by the turntable 132 and clamped by the clamper 160. The state at this time is shown in FIG.
Shown in If there is a reproduction command (S7), reproduction is started (S7).
8) If there is no reproduction command, the operation is stopped (S9). Since the CD reproduction standby operation is started during the storage of the tray unit 31, the CD 26 is immediately stored after the tray unit is stored.
0 playback can be started.

When the tray is ejected during the reproduction of the CD, the CD clamp is released and the CD is returned to the turntable 34. Then, after the rotary table 34 is rotated and returned to the rotation reference position (by detecting the hole 74), the tray section discharge is started. Thus, the engagement between the table rotating gear 150 and the gear 78 on the lower surface of the rotating table 30 is released, and the tray section 31 is discharged. Since the table rotation motor 138 and its driving force transmission means 152 are not provided on the lower surface of the tray 30, the tray portion 31 can be pulled out largely, and all the CD holding portions 5 can be pulled out.
Disk exchange can be performed for 1 to 55.

[0045]

[0046]

As described above, according to the present invention, it is possible to determine the presence or absence of a disk during the tray storage operation and to issue a standby operation, thereby shortening the time from storage of the tray to the start of reproduction. can do.

Further, according to the present invention, in the middle housing of the tray portion with a light emission unit and the light receiving unit in addition for determining the presence or absence of a large-diameter disk, after storage of the tray portion with the light emitting means and light receiving means Since the rotation position of the rotary table is detected by using the rotary table, the sensor can be used for both the determination of the presence or absence of the large-diameter disk and the detection of the rotary position of the rotary table, and the number of sensors can be reduced. Further, since the sensor comprising the light emitting means and the light receiving means is provided in the main body of the reproducing apparatus and is not provided in the tray section, it is necessary to draw out the signal line of the sensor from the tray section which is a movable section. And it can be easily routed.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention in a tray portion discharge state.

FIG. 2 is a plan view showing the disc reproducing apparatus of FIG. 1 in a state where a tray unit is stored.

FIG. 3 is an exploded perspective view showing a structure of a tray and a rotary table of FIG. 1;

FIG. 4 is a perspective view showing a part of a mechanism in the playback apparatus main body of FIG. 1;

FIG. 5 is a view as seen from arrows E, F, and G in FIG. 3;

FIG. 6 is a side view showing the operation of the clamp arm 162 of FIG.

7 is a block diagram illustrating an example of a system configuration of a control device that performs control from the start of storage of a tray unit to the start of reproduction in the disc reproduction device of FIG. 1;

FIG. 8 is a diagram showing an example of a control flow by the system controller of FIG. 7;

9 is a side view showing a state at the time of LV clamping and a state at the time of CD clamping in the disc reproducing apparatus of FIG. 1;

10 is a waveform chart showing a light receiving signal of the light receiving element 170 of FIG. 1 when the table is rotated.

[Explanation of symbols]

31 tray part 42, 70 large-diameter disk presence / absence detection hole 51-55 CD holding part ( small-diameter disk holding part) 62 LV holding part (large-diameter disk holding part) 44, 71-76 table rotation position detection hole 168 light emitting means 170 light receiving Means 172 Optical axis 252 System controller ( Large-diameter disk presence / absence determining means, Standby operation instruction means, Table rotation position detecting means) 258 LV ( Large-diameter disk) 260 CD ( Small-diameter disk )

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) G11B 17/22-17/30 G11B 19/10-19/12

Claims (1)

(57) [Claims] 1. A tray section stored and ejected from and to a reproducing apparatus main body, a large-diameter disc holding section configured to hold a large-diameter disc on the tray section, and rotatable on the tray section. Rotary table installed
And a small-diameter disc around the center of rotation of the turntable.
A plurality of small units configured on the rotary table
A large-diameter disk holding portion, a large-diameter disk presence / absence detection hole formed within a range of the large-diameter disk holding portion of the tray portion, and the rotation so as to communicate with the large-diameter disk presence / absence detection hole.
A large-diameter disc presence / absence detection hole formed in a table and the tray portion sandwiched between the large-diameter disc presence / absence detection holes in the main body of the reproducing apparatus while the tray portion is being stored and ejected. A light-emitting unit and a light-receiving unit disposed opposite to each other, and
Position and the tray unit is housed in the playback device main body.
When the rotary table is rotated in the state
Means and a light receiving means are arranged at a position where the optical axis passes.
The table rotation position detection hole and the tray are connected so as to communicate with the table rotation position detection hole.
Classification and tables rotational position detection hole configured Lee unit, the existence of large <br/> disk in the large-diameter disk holding portion by the light receiving output of the way by the light receiving means for the tray portion is a storing operation and the large-diameter disk whether discrimination means for, and standby operation command means for this large-diameter disk presence detecting means for commanding the standby operation for reproducing the large-diameter disk when it is determined that there is large-diameter disc, the tray portion is the In the state of being stored in the playback device body
Rotation of the rotary table by the light receiving output of the light receiving means
A disc reproducing apparatus comprising: a table rotation position detecting means for detecting a position .