JPH05135477A - Disk player - Google Patents

Abstract

PURPOSE:To quickly perform a starting operation of disks having a different class. CONSTITUTION:When the disks are housed successively in a housing part 5, the classes of an LD or CD are discriminated by an optical sensor 30, and also these discriminated classes are made to correspond to addresses corresponding to housed positions in the housing part 5 and stored successively in a memory. When the disks are reproduced, a pickup 40 is moved for standby to the recording start position of the disk to be reproduced before the disk is inserted and held (set) between a turntable 43 of spindle motor 42 and a clamper 44. Even in the case any disk of the CD and LD different in the class is being housed, the starting operations of each disk can be quickly performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention accommodates a plurality of discs each having a different diameter, such as a compact disc (hereinafter referred to as a CD) and a video disc (hereinafter referred to as an LD), and automatically selects a selected disc. The present invention relates to a disc player having an automatic change function for loading and reproducing data on a disc, and more particularly to a disc player capable of speeding up playback start-up by controlling the position of a pickup according to the type of disc selected. ..

[0002]

2. Description of the Related Art For example, in a laser karaoke system for business use, it is necessary for a highly-experienced and dedicated person in charge to work out a set of request songs that enter one after another and set them in a disc player. The auto change function acts on behalf of this dedicated person.

As a device having such an automatic change function, for example, Japanese Patent Application No. 3-213725 discloses a disc player as shown in FIG. Two disc reproducing sections 2A and 2B are provided above and below one side in the housing 1 of the disc player. A main tray 3 is provided near the upper end of the housing 1 so as to be freely drawn out. When the main tray 3 is pulled into the housing 1, it is housed on the lower surface side of the upper disk reproducing section 2A.

The main tray 3 includes the main tray 3
The sub-tray 4 is provided so as to be movable in a direction orthogonal to the moving direction of. Upper and lower disc playback unit 2
Between A and 2B, there is provided a storage section 5 for storing the sub-tray 4 holding the disc or the empty sub-tray 4 in a horizontally movable manner and in a stacked state. On the other side of the housing 1, there is provided a moving space of a carrying member 6 for carrying the sub-tray 4 between the upper and lower disc reproducing portions 2A and 2B. When the transport member 6 receives a driving force from a moving mechanism having a rack 7 and a pinion 8, etc.,
It moves vertically along the guide member 6a.

For the positioning of the transport member 6 in the vertical direction along the guide member 6a, a plurality of slits (not shown) extending along the moving direction of the transport member 6 are provided in the transport member 6. This is performed by counting each time a photo sensor (not shown) crosses and stopping the movement of the transport member 6 when the count value matches the designated address.

As shown in FIG. 2, the conveying member 6 is provided with an engaging member 10 which moves horizontally along the guide member 9. For example, when pulling out the sub-tray 4 from the main tray 3, the engaging member 10 moves to the main tray 3 side and engages with the engaging protrusion 4 a of the sub-tray 4. In this state, the engaging member 10 moves in a direction away from the main tray 3, so that the sub-tray 4 is pulled toward the transport member 6. When the sub-tray 4 is transferred from the transport member 6 side to the main tray 3 side, the engaging member 10 engages with the engaging protrusion 4a.
The sub-tray 4 is pushed to the main tray 3 side while being engaged with. When the sub-tray 4 is completely transferred to the main tray 3 side, the engagement state of the engagement protrusion 4a by the engagement member 10 is released. After that, the engaging member 10 moves in a direction away from the main tray 3.

In the disc player having such a structure,
When an operation key of an operation panel provided on the surface of the housing 1 or an operation key of a remote control device (hereinafter referred to as a remote controller) (neither is shown) is operated to issue an eject command for the main tray 3, for example, the main tray Housing 1 with sub tray 4 mounted on
It is pushed out. When the disc is placed on the sub-tray 4 and a loading command is given by operating the above-mentioned operation keys, the main tray 3 is pulled into the housing 1.

When the pulling operation of the main tray 3 is completed,
The transport member 6 moves to the position of the main tray 3 along the guide member 6a. Sub tray 4 on the main tray 3 side
Is pulled toward the conveying member 6 by the operation of the engaging member 10. The transport member 6 that has received the sub-tray 4 moves to one of the disc reproducing units 2A and 2B. When this movement is completed, the sub-tray 4 is pushed into the disc reproducing section 2A or 2B from the conveying member 6 by the operation of the engaging member 10, and the disc is reproduced.

In this state, for example, when the other disc reproducing section 2A or 2B is empty,
The sub-tray 4 accommodated in the accommodating portion 5 is conveyed by the conveying member 6 in the same manner as described above, and the other disc reproducing portion 2A is conveyed.
Alternatively, it is also possible to continuously reproduce by making the 2B side stand by. In addition, the empty sub-tray 4 stored in the storage section 5 is transferred to the main tray 3 by the transport member 6, the main tray 3 is ejected again, a new disc is stored in the sub-tray 4, and then loaded in the same manner as described above. Continuous reproduction is also possible by making the other disk reproducing section 2A or 2B stand by by the conveying member 6.

That is, since the sub-tray 4 holding the disc being reproduced is carried into the disc reproducing section 2A or 2B, the conveying member 6 is in an empty state in which the sub-tray 4 is not placed. On the other hand, each of the other sub-tray 4 stored in the storage portion 5 is vertically aligned, and accordingly, the protrusions 4a of each sub-tray 4 are also vertically aligned.

As a result, the transport member 6 moves in the vertical direction and temporarily stops at a position corresponding to the predetermined sub-tray 4 stored in the storage portion 5, and the sub-tray 4 is pulled out from the storage portion 5 in the same manner as above. The disc reproducing section 2A or 2 that can receive the received sub tray 4 is vacant.
It can be carried into the B side in the same manner as above.

Since the projection 4a provided on the sub-tray 4 projects in the moving direction of the main tray 2, the vertical movement of the conveying member 6 and the horizontal movement of the main tray 3 may affect each other. Instead, for example, the injection and loading operations of the main tray 3 can be performed even while the transport member 6 is moving up and down to access the predetermined sub-tray 4 of the storage section 5.

The disks in the sub-tray 4 stored in the storage section 5 are exchanged as follows. When the operation key for designating the disc exchange mode provided on the operation panel or the remote controller and the operation key for designating the address of the sub-tray 4 to be exchanged are operated, the transport member 6 is placed on the main tray 3. The placed sub-tray 4 is pulled out, and the sub-tray 4 is transported and transferred to a standby position (for example, the disc reproducing section 2A or 2B in an empty state) provided at a position other than the storage section 5. As a result, the main tray 3 becomes empty. Next, the transport member 6 moves to the position of the sub-tray 4 in the storage section 5 corresponding to the designated address, and receives the sub-tray 4 from the storage section 5 in the same manner as above. The carrying member 6 ascends to the main tray 3 side with the sub-tray 4 placed thereon, and delivers the sub-tray 4 to the main tray 3 side.

When the main tray 3 receives the sub tray 4, it shifts to the eject mode and the main tray 3 is pushed out of the housing 1. When a loading command is given after exchanging the disc in this ejected state, the main tray 3 is loaded to a predetermined position inside the housing 1. When the loading of the main tray 3 is completed, the transport member 6 receives the sub tray 4 and
The sub-tray 4 is returned to the original position in the storage section 5. In this state, since the main tray 3 becomes empty, the sub-tray 4 waiting at the standby position (that is, the disc reproducing section 2A or 2B) is again moved to the main tray 3 side.

As described above, the above-described operation is repeated by simply operating the operation keys provided on the operation panel or the remote controller to sequentially specify the disc number, the disc side, and the music number. Further, in the disc player having the above-described configuration, the disc stored in the storing portion 5 can be exchanged by ejecting the main tray 3 and loading operation. Therefore, the door of the housing 1 can be opened as in the conventional case. There is also an advantage that it is not necessary to manually replace the disk, and a predetermined disk can be reliably stored at a position corresponding to a predetermined address.

[0016]

By the way, in the laser karaoke system for business use, it is preferable that the access time (cue time) is fast in order to keep the singer from waiting and to improve the business efficiency. Therefore, in the above-described conventional disc player having the automatic change function, for example, two disc reproducing units 2A and 2B are provided, and when one disc reproducing unit 2A is reproducing, the other disc reproducing unit 2B is next. It is configured to put the disc to be played back in standby. Moreover, such a configuration is common.

However, when a plurality of disc reproducing units 2A and 2B are provided in this way, a sensor for detecting the disc type is required for each of the disc reproducing units 2A and 2B, so that the structure is complicated. Not only that, but there was a problem that the cost was increased.

On the other hand, as a disc on which information can be reproduced by an optical pickup, the diameter is 8 cm, 12
There are CDs of cm and LDs of 20 cm and 30 cm in diameter.
There is a so-called compatible type disc player for reproducing a plurality of types of discs having different diameters. In such a disc player, since the recording start position of the CD is located on the innermost peripheral side of the LD position, the respective recording start positions are different, and a detection means for detecting the disc type is provided. Will be needed. As a detection means for detecting the type of the disc, a method using focus lock-in or a method using a photo sensor or the like can be considered.

In disc discrimination by focus lock-in, as shown in FIG. 3, when the sub tray 4 is set in the disc reproducing section 2A or 2B (step 3).
01), the pickup is larger than 6cm radius and 10cm
It is moved to a smaller position (step 302), and the focus pull-in operation is performed at that position (step 303). If it can be locked in, it is determined that the LD is the LD, the pickup is moved to the LD start-up position (step 304), and the disc is reproduced (step 305).

On the other hand, if the lock-in is not possible at that position, the pickup is moved to a position smaller than the radius of 4 cm (step 306), and the focus pull-in operation is performed again at that position (step 307). If it can be locked in, it is determined to be a CD, and the pickup is moved to the CD starting position (step 308),
The disc is reproduced (step 305).

When the lock-in cannot be performed in (step 307), it is judged that there is no disk, and for example, a message of no disk is displayed on the display section. However, in the disc identification method by the focus lock-in, if the lock-in cannot be performed at the position where the LD should be focused, a series of sequence operation is performed in which the focus pull-in operation is performed again at the position where the CD should be focused. Therefore, the disc discriminating method as described above is applied to a disc player that accommodates a plurality of discs each having a different diameter and has an auto change function for automatically loading or playing a selected disc. In this case, after instructing the disc number, disc side and song number of the disc to be played,
The disadvantage is that it takes too long until the performance starts.

On the other hand, Japanese Patent Application No. 1-221706 discloses a loading device as shown in FIG. 4 for detecting the type of a disc by using a photo sensor or the like. The tray 20 has a step portion 2 on which an LD of 30 cm is placed.
Steps 20b and 12cm for mounting LDs of 0a and 20cm
Is provided with a step portion 20c for mounting the CD and a step portion 20d for mounting the 8 cm CD. Each step 20a to 20d
A hole (not shown) is provided in the. Sensors S1, S2, S3, and S4, which are photocouplers or mechanical switches, are provided at the bottom of each hole.

Further, a hole is provided in the outermost peripheral portion 20e of the tray 20 in the horizontal direction, and a sensor S5 similar to the above is provided in the inner part of the hole. In addition, this sensor S5
In particular, in the case where the sensors S1 to S4 are optical sensors, the sensors S1 to S4 are arranged so as not to move erroneously when external light such as illumination is extinguished, and are arranged at positions not blocked by the disc.

When each of the sensors S1 to S5 is mechanical, it is determined that the CD is 8 cm when the sensor S1 is on, and the CD is 12 cm when the sensor S2 is on.
20 cm when the sensor S3 is turned on because it is determined to be D
30 when the sensor S4 is on and it is determined that the LD is
It is determined that the LD is cm. When all the sensors S1 to S5 are off, it is determined that there is no disk.

Further, when each of the sensors S1 to S5 is of an optical type, a CD of 8 cm is provided when only the sensor S1 is turned on.
1 when the sensors S1 and S2 are turned on.
It is determined that the CD is 2 cm, the LD is 20 cm when the sensors S1 to S3 are on, and the sensor S1 is
When ~ S4 is on, it is judged to be a 30 cm LD. When all the sensors S1 to S5 are off, it is determined that there is no disk.

However, when such a tray 20 is applied to the disc player shown in FIG. 1 which is the premise of the present application, each sensor S1 to S5 in the tray 20 is required for each sub-tray 4, so that an innumerable number of sensors are used. Not only the sensors are required, but also the control lines connected to these sensors are required, which causes a problem that the number of parts increases too much.

The present invention has been made in consideration of such circumstances, and has a simple structure in which the type of each disc to be stored is stored in advance, and at the time of disc reproduction, the pickup operation is completed before the disc setting operation is completed. An object of the present invention is to provide a disc player that can speed up the start-up of reproduction by moving the position to the reading start position of the disc.

[0028]

In order to achieve the above object, the present invention is to store a plurality of discs of different types in a storage unit and to reproduce the discs by the transporting unit and the storage unit. A disc player conveyed to and from a player section, comprising storage means for storing a type of a disc to be stored in the storage section, a command for selecting a disc stored in the storage section, and the player section. After discriminating the command means for issuing a disc reproducing command and the type of the disc selected by the commanding device by referring to the stored information of the storage means, the pickup of the player section is moved to the signal recording start position of the disc. And a control means for controlling.

[0029]

In the disc player of the present invention, the type of the disc to be stored in the storage section is stored in the storage means in advance, and when the disc selecting instruction and the disc reproducing instruction are issued by the instructing means, the selected disc is selected. By determining the type of the selected disc by referring to the storage information of the storage means before the completion of the setting operation of, the pickup of the player unit can be moved to the signal recording start position of the disc.

Therefore, for example, the disc type can be manually input, and in this case, a sensor for detecting the disc type is unnecessary. Even when a plurality of discs having different diameters such as CDs and LDs are stored, the pickup waits at the signal recording start position of each disc before the loading operation of each disc is completed. Because
It becomes unnecessary to perform a series of sequence operations in the disc discriminating method by the focus lock-in as in the related art.

[0031]

Embodiments of the present invention will be described below in detail with reference to the drawings. In the drawings described below, the same parts as those in FIG. 1 are designated by the same reference numerals, and overlapping description will be omitted. FIG. 5 shows an embodiment of the disc player of the present invention. Disc reproducing parts 2A and 2B are provided on one side of the housing 1 of the disc player. Each disc reproducing section 2A, 2B is provided with a single pickup as shown in FIG. 13 described later. A main tray 3 is provided near the upper end of the housing 1 so as to be movable back and forth. The main tray 3 is provided with a sub-tray 4 which is movable in a direction orthogonal to the moving direction of the main tray 3. Then, when the main tray 3 retracts inside the housing 1, it is housed on the lower surface side of the disc reproducing portion 2A.

As shown in FIG. 6, an optical type detection sensor (hereinafter referred to as a sensor) 30 having a light receiving portion 30A and a light emitting portion 30B sandwiches the main tray 3 on the lower surface side of the disc reproducing portion 2A. It is installed in. Light receiving unit 30
Light receiving elements 30a and 30c and light emitting elements 30b and 30d are provided in A and the light emitting section 30B. The relative positions of the optical sensor 30 and the disc housed in the sub-tray 4 movably provided in the main tray 3 have the relationship shown in FIG.

That is, the light receiving element 30a and the light emitting element 30
b is located above and below the point a on the outer peripheral edge of the CD 30E having a size of 8 cm, and the light receiving element 30c and the light emitting element 30d are 20
It is arranged so as to be located above and below the point b of the m video disc 30C.

Then, the light emitted from the light emitting portion 30B side passes through the clamping hole 4a of the sub-tray 4 and the hole 3a provided corresponding thereto, and reaches the light receiving portion 30A side. As a result, the detection result of the optical sensor 30 is
As shown in the truth table of FIG. 8, (1, 1: with video disc), (1, 0: with compact disc),
There are three types (0, 0: no disk). In addition, 30
B and 30D show an LD with a diameter of 30 cm and a CD with a diameter of 12 cm, respectively.

Between the upper and lower disc reproducing units 2, there is provided a storage unit 5 for storing the sub-tray 4 holding the disc or the empty sub-tray 4 so as to be movable in the horizontal direction and stacked. On the other side of the housing 1, there is provided a moving space for the carrying member 6 for carrying the sub-tray 4.

The positioning of the conveying member 6 in the vertical direction along the guide member 6a is performed by a photosensor provided on the conveying member 6 across a plurality of slits of the member extending along the moving direction of the conveying member 6. This is performed by counting each time, and stopping the movement of the transport member 6 when the count value matches the designated address.

FIG. 9 shows a control system for controlling the operation of the disc player shown in FIG. 5, in which the disc reproducing section controllers 2a, 2b, and 2b are provided to the control section 32 for controlling the operation of each component. The transport member controller 6a, the main tray controller 3a, the key code generator 33a, the sensor controller 30e, and the memory 31 are connected to each other via a data bus.

Disc reproducing unit 2A, disc reproducing unit 2
B, transport member 6, main tray 3, type detection sensor 30
Are disk reproduction unit controllers 2a, 2b,
It is driven by control signals from the transport member controller 6a, the main tray controller 3a, and the sensor controller 30e.

The key code generator 33a is provided with the operation keys 33.
Alternatively, the key code data corresponding to the command mode of the remote control signal light receiving unit 34a for receiving the remote control signal from the remote control 34a is generated. The memory 31 stores an address and disc type information corresponding to the storage position in the storage section 5 for each disc.

Next, the operation when the disc is stored in the storage portion 5 will be described with reference to FIGS. First,
When the disc is accommodated in the sub-tray 4 placed on the main tray 3 in the state shown in FIG. 10 and the main tray 3 is closed, the main tray 3 moves to the lower surface side of the disc reproducing section 2A (step 1201). At this time, the disc of the sub-tray 4 is located between the light receiving portion 30A and the light emitting portion 30B of the sensor 30.

Simultaneously with closing the main tray 3, the optical sensor 30 is driven by the control of the controller 32 (step 1202). By driving the sensor 30, the detection result of each of the light receiving elements 30a and 30c on the light receiving unit 30A side is obtained, and the type of the disc or the like is determined based on the detection result.

That is, when both the light receiving elements 30a and 30c are active (step 1203), it is determined that (1, 1: video disk exists) (step 1204).
When both the light receiving elements 30a and 30c are not active and only the light receiving element 30c is active (step 120
5), (1, 0: Compact disk present) is determined (step 1206). When both the light receiving elements 30a and 30c are passive, it is determined that (0, 0: no disk) (step 1207).

Based on such a determination result, the control unit 32
Stores the address and disk type information corresponding to the storage position in the storage section 5 in the memory 31 (step 1208). When the operation of storing the information in the memory 31 is completed, the sub-tray 4 accommodating any one of the disks is stored in a predetermined position of the storage section 5 by the above-described transfer operation of the transfer member 6 (step 1209).

When the operation of storing the sub-tray 4 is completed, the main tray 3 becomes empty, and as described above, the transport member 6 pulls out another sub-tray 4 from the storage section 5 and transfers the sub-tray 4 to the main tray 3. The next disc can be stored. Even when the disc already stored in the storage unit 5 is replaced, the address and the disc type information corresponding to the storage position in the storage unit 5 are stored in the memory 31 by the same procedure as described above. In this case, new information is written by overwriting the address in the memory 31, for example.

Next, the reproducing operation of the disc will be described with reference to FIGS. 13 and 14. First, when the disc number, the disc side, and the music number are designated by the operation keys 33 or the remote controller 34, the designated disc type is discriminated based on the information stored in the memory 31 (step 1401). If the LD is determined, the pickup 40 is moved along the guide shaft 41 to the LD start-up position in the radial direction of the disc (step 1402).

When the designated disc type is discriminated as a CD in the same manner as described above, the pickup 40 moves along the guide shaft 41 in the radial direction C of the disc.
It is moved to the rising position of D (step 1403).
On the other hand, when it is determined that there is no disc, a warning is displayed on a display unit (not shown) provided on the front surface side of the housing 1 (step 1404). The means for notifying the warning is not limited to this example, and for example, a method of blinking the display lamp or sounding a buzzer may be used.

Either the LD or the CD is the turntable 43 of the spindle motor 42 and the clamper 44.
When the disc is sandwiched (set) (step 1405), the disc is reproduced immediately after the disc reaches a predetermined number of revolutions by the driving force of the spindle motor 42 (step 1406).

As described above, in this embodiment, the type of LD or CD is discriminated by the optical sensor 30 when the discs are successively accommodated in the accommodating section 5, and the discriminated type and the accommodating section 5 are discriminated. The addresses corresponding to the storage positions were stored in the memory 31 in order. At the time of reproducing the disc, the pickup 40 is moved to the recording start position of the disc to be reproduced and made to stand by before the disc is clamped (set) between the turntable 43 and the clamper 44 of the spindle motor 42. The recording start position differs due to the difference in C
Even when either of the D and LD disks is stored, the startup operation of each disk can be performed quickly.

In the present embodiment, the case where the present invention is applied to the disc player having the main tray 3 which can be moved forward and backward with respect to the housing 1 has been described, but the present invention is not limited to this example, and the door of the housing 1 can be used. It may be applied to a disc player of a type in which the disc is released and the disc is manually replaced. In this case, when the disc is replaced, the type of the disc and the address corresponding to the storage position are stored in the memory 31 in association with each other by manual input.

[0050]

As described above, according to the disc player of the present invention, the type of the disc to be accommodated in the accommodating portion is stored in the storage means in advance, and the command means issues a disc selection command and disc reproduction. When a command is issued, the type of the selected disc is determined by referring to the storage information of the storage means before the setting operation of the selected disc is completed, and the pickup of the player unit is moved to the signal recording start position of the disc. Can be kept.

Therefore, for example, the type of the disc can be manually input, and in this case, the sensor for detecting the type of the disc can be eliminated, so that the sensor and the parts associated with the sensor can be omitted. It can be omitted and the configuration can be simplified.

Even when a plurality of types of discs having different signal recording start positions are accommodated due to different types of discs such as CDs and LDs, before loading of each disc is completed, By making the pickup stand by at the signal recording start position, a series of sequence operations in the disc discriminating method by the focus lock-in which is required in the related art are not required, and therefore the speed of the reproduction start-up can be increased.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of the configuration of a conventional disc player.

FIG. 2 is a perspective view for explaining a delivery state by the transport member of FIG.

FIG. 3 is a flowchart for explaining a focus lock-in operation as an example for discriminating the type of a conventional disc.

FIG. 4 is a perspective view showing a loading device using a sensor as another example for discriminating the type of a conventional disc.

FIG. 5 is a perspective view showing an embodiment of a disc player of the present invention.

FIG. 6 is a cross-sectional view for explaining an arrangement state of optical sensors of the disc player shown in FIG.

7 is a perspective view showing a relative positional relationship between a light emitting element and a light receiving element of the optical sensor of FIG. 6 and discs of different types.

8 is a diagram showing a truth table which is a detection result by the optical sensor of FIG.

9 is a block diagram showing a control system of the disc player shown in FIG.

FIG. 10 is a diagram for explaining the operation of the disc player shown in FIG.

FIG. 11 is a diagram for explaining the operation of the disc player of FIG.

12 is a flowchart for explaining an information storing operation in a memory when the disc player of FIG. 5 stores the disc.

13 is a side view for explaining a start-up position of a CD or LD by a pickup of the disc player shown in FIG.

14 is a flow chart for explaining an operation of the disc player shown in FIG. 5 during disc reproduction.

[Explanation of symbols]

 1 Housing 2A, 2B Disc Playback Section 3 Main Tray 4 Sub-Tray 5 Storage Section 6 Conveying Member 30 Type Detection Sensor 30A Light-Receiving Section 30B Light-Emitting Section 30a, 30c Light-Receiving Element 30b, 30d Light-Emitting Element 31 Memory

Claims (1)

[Claims] 1. A disc player in which a plurality of discs of different types are accommodated in a storage unit, and the discs are transported by a transporting unit between the storage unit and a player unit for reproducing the discs. A storage unit that stores the type of the disc to be stored in the storage unit; a command unit that issues a selection command of the disc stored in the storage unit and a reproduction command of the disc by the player unit; A disc player, further comprising: a control unit that moves the pickup of the player unit to a signal recording start position of the disc after determining the disc type by referring to the storage information of the storage unit.