JP2612821B2 - Recording medium playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001]

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auto-loading disc player, and more particularly to a slot-in type auto-loading for loading (loading / unloading) of an information recording disc (hereinafter simply referred to as a disc) by a conveying roller. Regarding disk players.

[0003]

[0002]

[0004]

2. Description of the Related Art In an auto loading disk player of this kind, a disk is carried to a playing position by, for example, forward rotation of a pair of upper and lower transport rollers disposed near a disk insertion opening, and is carried out to a disk insertion opening by reverse rotation. In general, the number of discs that can be played is limited to one type. In a conventional digital audio disc player, a compact disc (CD) of 12 cm is to be played.

[0005]

[0003]

[0006]

However, 12 cm C
For D, an 8 cm CD is being introduced to the market as a single disc, and when this 8 cm CD is inserted into the above-mentioned auto loading disc player, if it is taken into the player as it is, there is a problem that the eject cannot be carried out. there's a possibility that.

[0007]

[0004]

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has as its object to provide an auto loading disc player capable of coping with a case where a disc smaller in size than the target size is inserted. Purpose
Having a transport roller arranged near the disk insertion slot,
An auto-loading disc player that carries an information recording disc to a reproduction position by forward rotation of the transport roller and unloads the disc to the disc insertion port by reverse rotation, and is provided near the transport roller to determine the presence or absence of a disc. A first non-contact type detecting means for detecting, a second detecting means for detecting completion of loading of the disk into a predetermined position in the player, and a control means for controlling the forward / reverse rotation of the transport roller. The control means controls the forward rotation of the transport roller when the first non-contact type detection means does not detect the presence of the disk before the second detection means detects the completion of the loading at the time of loading the disk. It is configured to stop and then control to reversely drive the transport roller for a certain time.

[0009]

[0005]

[0010]

According to the auto loading disc player of the present invention, even if a disc smaller in size than the target size is inserted, it can be reliably ejected to the final position.

[0011]

[0006]

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of an auto loading disk player according to the present invention. The player is a 12 cm CD compatible player. In the figure, when a disc 3 is inserted into a disc insertion slot 2 formed in a front panel 1 of the player body, the disc 3 is inserted.
Is taken into the player body by the forward rotation of a pair of upper and lower transport rollers 4a and 4b arranged near the disk insertion slot 2. A disk detection sensor 5 as first detection means for detecting the completion of insertion and ejection of the disk 3 into the disk insertion port 2, that is, the presence or absence of the disk 3, is provided near the disk insertion port 2 side of the transport roller 4 a. The output of the 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. The pair of transport rollers 4a and 4b are driven by a loading motor 7 as a drive source, and carry the disc 3 into the playing position and carry it out to the disc insertion slot 2 by rotating in opposite directions.
This loading operation is performed by a pair of transport rollers 4a,
4b and a mechanism unit (not shown).

[0014]

When the center hole reaches the center of the turntable 8, the disk 3 carried by the pair of transport rollers 4a and 4b is lowered by the action of a mechanism (not shown) and is mounted on the turntable 8. You. This position is the playing position, and the disk 3 placed on the turntable 8
Is driven to rotate by a spindle motor 9. When the disc 3 descends, at least the lower transport roller 4a descends to the position shown by the broken line in the figure which does not hinder the rotation of the disc 3 in conjunction with the mechanism. When the disk 3 arrives at the playing position, a loading completion detecting sensor 10 as second detecting means for detecting the completion of loading of the disk 3 to the playing position.
Is actuated by the mechanism. For example, a mechanical switch is used as the carry-in completion detection sensor 10, and the output is supplied to the controller 6.

[0015]

The controller 6 comprises a processor, ROM, R
A disk detection sensor 5 and a loading completion detection sensor 10
Control of the loading motor 7 via the motor drive circuit 12 in response to a command or the like from the operation unit 11 to control the forward and reverse rotation of the pair of transport rollers 4a and 4b, ie, control the loading operation. Perform In addition,
When the disc 3 is at the playing position, the presence of the disc 3 is detected by the disc detection sensor 5.

[0016]

Next, a control procedure of a loading operation executed by a processor of the controller 6 will be described with reference to a 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 insertion of the disk 3 is detected, the pair of transport rollers 4a and 4b. To the motor drive circuit 12 to start the insertion of the disk 3 (step S2). In this loading operation, the presence or absence of the disk 3 is monitored by constantly sensing the output of the disk detection sensor 5 (step S3). At the same time, the completion of loading of the disk 3 is monitored by sensing the output of the loading completion detection sensor 10. (Step S
4). When the completion of the loading of the disk 3 is detected, the stop of the transport rollers 4a and 4b is instructed to the motor drive circuit 12 to complete the loading operation (step S5), and thereafter the mode is shifted to the performance mode.

[0018]

When a performance end signal indicating the end of the performance is supplied from means (not shown), or when a performance stop command is issued from the operation unit 11, the processor operates the pair of transport rollers 4a and 4b. By instructing the motor drive circuit 12 to perform reverse rotation, the operation of the disk
When the disc 3 is completely ejected and the disc detection sensor 5 does not detect the presence of the disc 3, the motor drive circuit 12 is instructed to stop the transport rollers 4a and 4b to complete the carry-out operation. .

[0019]

FIG. 3 shows the positional relationship between the transport rollers 4a and 4b, the disk detection sensor 5, and the loading completion detection sensor 10 and the disk.
The solid line indicates the insertion position into the disk insertion slot 2, the dashed line indicates the playing position, and the broken line indicates the eject position.

[0020]

Next, a case where an 8 cm CD is inserted into the disk insertion slot 2 will be described. When the 8 cm CD is inserted into the disc insertion slot 2 with a bias toward the opposite side to the disc detection sensor 5, the disc detection sensor 5 does not detect the insertion of the disc as shown by the two-dot chain line of a small circle in FIG. No loading operation is performed.

[0021]

On the other hand, when the 8 cm CD is inserted in a direction toward the disk detection sensor 5 as shown by the solid line, the disk detection sensor 5 detects the insertion of the disk, and
As in the case of D, the loading operation is started. In this loading operation, the processor constantly monitors the presence or absence of the disk 3 by sensing the output of the disk detecting sensor 5 (step S3), but the loading completion detecting sensor 10 detects the completion of the loading because the disk size is small. Since the disc detection sensor 5 does not detect the presence of the disc before detecting the disc, it is determined that an 8 cm CD has been inserted, and a reverse rotation of the pair of transport rollers 4a and 4b is commanded to the motor drive circuit 12 (step S6). Then, the elapse of a predetermined time is monitored (step S7), and when the predetermined time elapses, the motor driving circuit 12 is instructed to stop the transport rollers 4a and 4b (step S8). This operation allows the user to
Even if the mCD is inserted by mistake, it is possible to prevent a problem in that the mCD cannot be ejected (carrying out) by being taken into the player as it is.

[0022]

In the above embodiment, the disc is ejected when it is determined that an 8 cm CD has been inserted. However, as is apparent from FIG.
In the position where the presence of the disk is no longer detected (the position indicated by the dashed line in the figure), a part of the disk is still on the front panel 1.
Since it is in a state of slightly protruding outward, the carrying-in operation may be simply stopped.

[0023]

[0015]

[0024]

As described above, according to the auto loading disk player of the present invention, when the disk is loaded, the disk detection sensor detects the presence of the disk before the loading completion detection sensor detects the completion of the loading of the disk. When a disc smaller in size than the target size is inserted, it is not possible to eject the loaded disc. Become.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of the present invention.

FIG. 2 is a flowchart showing a control procedure of a loading operation executed by a processor.

FIG. 3 is a diagram showing a positional relationship between a transport roller, a disk detection sensor, and a disk, where a large circle shows a case of 12 cm CD, and a small circle shows a case of 8 cm CD.

[Explanation of symbols]

 2 Disc insertion slot 3 Information recording disc 4a, 4b Transport roller 5 Non-contact disc detection sensor 6 Controller 7 Loading motor 8 Turntable 10 Loading completion detection sensor

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Seiji Morikawa 25-1, Nishimachi, Yamada, Kawajie-shi, Saitama Prefecture Pioneer Co., Ltd. Examiner at Kawagoe Factory Yoji Sugawasawa (56) References JP-A-59-68870 (JP, A)

Claims (1)

(57) [Claims] An information recording medium is re-inserted from a recording medium insertion slot.
Transport means for transporting the information recording medium to a raw position;
A first method for detecting the presence or absence of the information recording medium without contacting the information recording medium
Detecting means for detecting that the information recording medium has been transported to the reproduction position.
A second detecting means for detecting the movement of the transfer means, and a control means for controlling a transfer operation of the transfer means.
The second detection means detects the transport to the reproduction position.
Before the first detecting means detects that the information recording medium is present,
When the presence is no longer detected, the transfer
Recording medium characterized by controlling the operation to stop.
Raw equipment.