JPH0532825B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to an autoloading disk player, and particularly to a slot-in type autoloading disk player in which an information recording disk (hereinafter simply referred to as a disk) is loaded (loaded/unloaded) using a conveyor roller. Relating to an autoloading disk player.

BACKGROUND ART In this type of autoloading disk player, a pair of upper and lower conveyance rollers placed near the disk insertion port, for example, carry the disk to a playing position by rotating in the forward direction, and carry it out to the disk insertion port by rotating in the reverse direction. Generally, the disc size that can be played is limited to one type, and in the case of conventional digital audio disc players, it is a 12 cm compact disc (CD).
is the subject of performance. However, 8cm CDs are being introduced into the market as single discs in contrast to 12cm CDs, and when this 8cm CD is inserted into the above-mentioned autoloading disc player, there is a problem in that it cannot be ejected if it is loaded into the player as is. may occur.

Summary of the invention The present invention has been made in view of the above points, and
To provide an autoloading disc player capable of dealing with the case where a disc of a smaller size than a target size is inserted.

The autoloading disc player according to the present invention is provided with a first detection means for detecting the presence or absence of a disc near the conveyance roller disposed near the disc insertion slot, and also detects the completion of loading the disc to the playing position. A second detecting means is provided to detect the disk, and when the first detecting means no longer detects the presence of the disk before the second detecting means detects the completion of carrying in the disk, the disk carrying operation is stopped. It is structured as follows.

Embodiments Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

FIG. 1 is a block diagram showing an embodiment of an autoloading disc player according to the present invention, and this player is compatible with a 12 cm CD. In the figure, when a disc 3 is inserted into a disc insertion slot 2 formed on the front panel 1 of the player main body, the disc 3 is moved to the right side of a pair of upper and lower transport rollers 4a and 4b arranged near the disc insertion slot 2. It is taken into the player body by rotation. Near the disk insertion opening 2 side of the transport roller 4a, there is a disk detection sensor 5 as a first detection means for detecting the completion of insertion and ejection of the disk 3 into the disk insertion opening 2, that is, the presence or absence of the disk 3. The output of this disk detection sensor 5 is supplied to a controller 6. As the disk detection sensor 5, a non-contact type photo sensor, for example, is used. a pair of conveyor rollers 4a,
4b uses the loading motor 7 as a drive source, and carries the disk 3 into the playing position and out of the disk insertion slot 2 by rotating in opposite directions. Note that this loading operation is performed by the cooperation of the pair of conveying rollers 4a, 4b and a mechanical section (not shown).

The disk 3 carried in by the pair of conveyor rollers 4a and 4b has its center hole aligned with the turntable 8.
When it reaches the center of the turntable 8, it is lowered by the action of a mechanism (not shown) and placed on the turntable 8.
This position becomes the performance position, and the disk 3 placed on the turntable 8 is rotationally driven by the spindle motor 9. Incidentally, when the disk 3 is lowered, at least the lower conveyance roller 4a is lowered in conjunction with the mechanism section to a position shown by a broken line in the figure where the rotation of the disk 3 is not hindered. When the disc 3 arrives at the performance position, the mechanism section activates a loading completion detection sensor 10 as a second detection means for detecting completion of loading the disc 3 into the performance position. For example, a mechanical switch is used as the carry-in completion detection sensor 10, and its output is supplied to the controller 6.

Controller 6 is a processor, ROM, RAM
The outputs of the disk detection sensor 5 and loading completion detection sensor 10 control the loading motor 7 via the motor drive circuit 12 in response to commands from the operation unit 11, etc. A pair of conveyor rollers 4
Controls the forward and reverse rotation of a and 4b, that is, the loading operation. Note that when the disc 3 is at the performance position, the disc detection sensor 5 detects the presence of the disc 3.

Next, the control procedure of the loading operation executed by the processor of the controller 6 will be explained according to the flowchart of FIG.

The processor monitors the insertion of the disk 3 into the disk insertion slot 2 by sensing the output of the disk detection sensor 5 (step S1), and when the processor detects the insertion of the disk 3, the pair of transport rollers 4
The motor drive circuit 12 is commanded to rotate the disks a and 4b in the normal direction to start loading the disk 3 (step S2).
During this carrying-in operation, the disk detection sensor 5
The presence or absence of the disk 3 is monitored by sensing the output of the sensor 10 (step S3), and at the same time, the completion of loading the disk 3 is monitored by sensing the output of the loading completion detection sensor 10 (step S3).
S4). When the completion of loading the disk 3 is detected, the motor drive circuit 12 is commanded to stop the conveyance rollers 4a and 4b, and the loading operation is completed (step 3).
S5), and then shifts to performance mode.

Note that when a performance end signal indicating that the performance has ended is supplied from a means (not shown) or a performance stop command is issued from the operation section 11, the processor causes the pair of conveyor rollers 4a and 4b to rotate in reverse order using the motor. By instructing the drive circuit 12, the disk 3 is carried out by the operation opposite to that described above, and when the disk 3 is completely ejected and the disk detection sensor 5 no longer detects the presence of the disk 3, the disk 3 is transferred. The motor drive circuit 12 is commanded to stop the rollers 4a and 4b, and the unloading operation is completed. In Figure 3,
The positional relationship between the conveyance rollers 4a, 4b, the disk detection sensor 5, the loading completion detection sensor 10, and the disk is shown, and the large circle is 12 cmCD,
The solid line indicates the insertion position into the disc insertion slot 2, the dashed line indicates the performance position, and the broken line indicates the ejection position.

Next, a case where an 8 cm CD is inserted into the disc insertion slot 2 will be explained. If the 8 cm CD is inserted into the disk insertion slot 2 with a bias toward the side opposite to the disk detection sensor 5, the disk detection sensor 5 will not detect the insertion of the disk, as shown by the small circle double-dashed line in Fig. 3. , no loading operation is performed. On the other hand, when the 8 cm CD is inserted biased toward the disk detection sensor 5 side as shown by the solid line, the disk detection sensor 5 detects the insertion of the disk, and the loading operation is started in the same way as in the case of the 12 cm CD. In this carrying-in operation, the processor constantly monitors the presence or absence of the disk 3 by sensing the output of the disk detection sensor 5 (step S3), but due to the small size of the disk, the carrying-in completion detection sensor 10 is Since the disk detection sensor 5 no longer detects the presence of the disk before detecting the completion of loading, it is determined that an 8 cm CD has been inserted, and the motor drive circuit 12 is instructed to reverse the pair of transport rollers 4a and 4b (step S6). Subsequently, the passage of a certain period of time is monitored (step S7), and when the certain period of time has elapsed, the motor drive circuit 12 is commanded to stop the conveyance rollers 4a, 4b (step S8).
By this operation, even if the user accidentally inserts an 8cm CD, it is possible to prevent a problem such as being unable to eject the CD by loading it into the player.

In the above embodiment, the disk is ejected when it is determined that an 8 cm CD has been inserted, but as is clear from FIG. At the position shown by the one-dot chain line), a portion of the disk still protrudes slightly outward from the front panel 1, so the carrying-in operation may be simply stopped.

Effects of the Invention As explained above, according to the autoloading disk player of the present invention, the disk detection sensor does not detect the presence of the disk before the loading completion detection sensor detects the completion of disk loading when loading the disk. Since the structure is such that the disk loading operation is stopped when the disk is used up, it is possible to prevent problems such as not being able to eject the loaded disk if a disk smaller than the target size is inserted. .

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing one embodiment of the present invention, and FIG.
The figure is a flowchart showing the control procedure of the loading operation executed by the processor, and Figure 3 is a diagram showing the positional relationship between the transport roller, the disk detection sensor, the loading completion detection sensor, and the disk. In the case of , the small circle is 8
The case of cmCD is shown respectively. Explanation of symbols of main parts 2...Disk insertion slot, 3...Information recording disk, 4a, 4b...Transport roller, 5...Disk detection sensor, 6...Controller, 7...Loading motor, 8...
Turntable, 10... Loading completion detection sensor.

Claims (1)

[Scope of Claims] 1. It has a conveyance roller disposed near the disk insertion opening, and by forward rotation of this conveyance roller, the information recording disk is carried to the performance position, and by reverse rotation, it is conveyed to the said disk insertion opening. An autoloading disc player for transporting, wherein a first detection means is provided near the transport roller to detect the presence or absence of a disc, and a second detection means to detect completion of transport of the disc to a performance position. and control means for driving control of the forward rotation and reverse rotation of the conveyance roller, and the control means controls the first detection means before the second detection means detects the completion of the loading at the time of loading the disk. An autoloading disk player characterized in that the automatic loading disk player is controlled to stop normal rotation of the conveying roller when the conveyance roller no longer detects the presence of a disk. 2. The autoloading disk player according to claim 1, wherein the control means controls the transport roller to rotate in the reverse direction after stopping normal rotation of the transport roller.