JPH05144151A - Discoid recording medium carrier device - Google Patents

Abstract

PURPOSE:To provide a disk drive device for a CD player capable of preventing the loading of a disk which is improper in size. CONSTITUTION:In the discoid recording medium carrier device for carrying a discoid recording medium inserted from an inserting hole 2 to a prescribed mounting place 15, plural sensors 21, 22 and 23 for detecting the insertion of the recording medium are disposed separately from each other at more than a prescribed distance in the vicinity of the inserting hole 2, and only when the insertion of the recording medium is detected by a specific number of sensors or more out of the plural sensors 21-23, the carrying of the medium to the mounting place 15 is then performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc-shaped recording medium conveying device suitable for being applied to a reproducing device of a compact disc (hereinafter referred to as a CD) on which digital audio data is recorded.

[0002]

2. Description of the Related Art Conventionally, in a CD reproducing apparatus in which digital audio data is recorded, that is, a CD player,
Generally, as a method of loading a disc, a built-in carrier method, for example, a method of placing and loading a disc on a pull-out type disc table is used, but this system pulls out the disc table to the front side of the player body. Space is required, and there is a problem in space, especially when a CD player is mounted on an automobile or the like, there is a problem of a protrusion in the narrow vehicle interior. Is desirable. FIG. 2 is a view showing the outer appearance of the slot-in type CD player. In the figure, reference numeral 1 shows a housing of the CD player, and a disc insertion slot 2 and operation members 3 are provided on the front side.
A frame-shaped panel 4 having a and is mounted. Then, the disc is directly inserted into the insertion slot 2 so that the inner roller loads (conveys) the disc to the disc rotation drive unit. When the disc inserted in the CD player is taken out, the roller rotates in the reverse direction and is ejected from the insertion slot 2.

With this construction of the slot-in system, the device itself does not project at the time of loading the disc and can be installed in a narrow space such as an automobile without any problem.

[0004]

By the way, there are two kinds of CDs having a diameter of 12 cm and 8 cm for recording digital audio signals. Here, in the case of the slot-in type CD player described above, if the CDs of both sizes can be loaded, the diameter is 8 cm.
Requires a special mechanism for the CD. That is, for a CD with a diameter of 12 cm, the width of the disc insertion slot should be 1
If the size is set to be slightly larger than 2 cm, the disc is always inserted in almost the same state, the center of the disc is not largely displaced, and the disc rotation drive unit is properly loaded without a special mechanism. On the other hand, in the case of a CD with a diameter of 8 cm, the width of the insertion slot is about 12 cm, so the center of the disc inserted from the insertion slot may be displaced by ± 2 cm from the specified position. Even a disc inserted with a large deviation from the position thus defined requires a complicated mechanism for correctly loading the disc into the disc rotation drive unit.

Therefore, in the case of a slot-in type CD player, when two types of discs of 12 cm and 8 cm are used, there is a disadvantage that the mechanism becomes complicated. It is conceivable that only one type of disc can be loaded. In this case, considering a slot-in type CD player compatible only with 8 cm discs, it is impossible to insert a 12 cm disc if the width of the disc insertion slot is set to about 8 cm. Accidents where the disc is inserted can be prevented.

On the other hand, when considering a slot-in type CD player compatible with only 12 cm discs, it is impossible to regulate the insertion of 8 cm discs by the width of the disc insertion slot, and an 8 cm disc is erroneously inserted. It may be inserted through the mouth. If a disc of an unsupported size is erroneously inserted in this way, the loading operation by the rollers or the like may be started, and the disc may completely enter the inside and may not be taken out.

In view of these points, the present invention has an object of providing an apparatus of this type capable of preventing the loading of a disc having an incompatible size.

[0008]

The present invention is, for example, as shown in FIG. 1, in a disc-shaped recording medium conveying device for conveying a disc-shaped recording medium inserted from an insertion port 2 to a predetermined mounting position 15. , A plurality of sensors 21, 22, 23 for detecting that a recording medium has been inserted near the insertion slot 2.
Are separated by a predetermined distance or more, and a plurality of sensors 21 to 23 are arranged.
Only when a predetermined number or more of the sensors detect the insertion of the recording medium, the conveyance to the placement place 15 is performed.

[0009]

By doing so, when a recording medium having a small diameter is inserted from the insertion port, a plurality of sensors arranged at a distance larger than the diameter of the recording medium do not detect the insertion at the same time, and the insertion is not performed at the same time. By controlling the conveyance in accordance with the detection states of a plurality of sensors that detect the, it is possible to prevent an accident in which a recording medium having a small diameter is erroneously conveyed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

This example is applied to the slot-in type CD player shown in FIG. 2. The player of this example is a CD player capable of reproducing only a disc having a diameter of 12 cm, and a disc having a diameter of 8 cm cannot be reproduced. It has a relatively simple structure that cannot be done. Then, the inside of this player is configured as shown in FIG. FIG. 1 is a view mainly showing the loading mechanism of a disc inserted from the insertion slot 2. In the figure, reference numeral 10 denotes a frame installed in the housing 1, and the frame 10 has a loading mechanism for the disc and a rotation mechanism. A drive mechanism (reproduction unit) is configured. In the vicinity of the insertion slot 2, a pair of upper and lower rollers 11a, 11
A guide roller 11 composed of b is arranged, and a pair of upper and lower rollers 12a, 1
A drive roller 12 composed of 2b is arranged. And
The guide roller 11 can be freely rotated,
The driving roller 12 is rotationally driven by a loading motor (not shown), and when all the sensors 21 to 23 described later detect a disc, the driving roller 12 is rotationally driven to load the inside thereof. There is. Therefore, when the drive roller 12 is not driven, the disc inserted from the insertion slot 2 can be inserted to a position where it abuts the drive roller 12. The distance from the insertion port 2 to the drive roller 12 is 8 cm or less, and when a disc having a diameter of 8 cm is inserted, a part of this disc protrudes from the insertion port 2 to the outside of the housing 1. ..

A spindle motor 13 is arranged in the back of the drive roller 12, and a chucking board 15 rotatably attached to the tip of a chucking arm 14 is arranged above the spindle motor 13. is there. Then, the disk loaded to the position of the chucking board 15 is chucked by the chucking board 15 so that the disk can be rotationally driven by the spindle motor 13. In this case, the chucking board 15 performs the chucking operation by the movement of the chucking arm 14. Further, in the chucked state, the drive roller 12b is moved downward and separated from the disc. An optical pickup 16 which is movable in the radial direction of the chucked disc is arranged near the spindle motor 13, and the optical pickup 16 reads the data recorded on the disc.

When the disc is taken out, the chucking of the disc chucked by the chucking board 15 is released, and the driving roller 12b moves upward to move the disc to the driving roller 1.
In the state of being sandwiched by 2a and 12b, the driving roller 12 is driven to rotate to be discharged to the insertion port 2 side and taken out.

In this example, three optical sensors 21, 22, 23 are provided between the insertion port 2 and the guide roller 11.
Is arranged. The respective optical sensors 21, 22,
Reference numeral 23 has a configuration for outputting an infrared signal and detecting return light of the output signal. When the disc is directly above each sensor, the return light is detected to detect the presence of the disc. .. Then, this detection data is supplied to a disc loading control circuit (not shown).

In this case, the distance a between the adjacent optical sensors 21 and 22 and the distance b between the adjacent optical sensors 22 and 23 are values exceeding 4 cm (for example, 4.5c).
m), and the distance (a + b) between the sensor 21 at the left end and the sensor 23 at the right end slightly exceeds 8 cm (for example, 9c).
m).

In the loading control circuit, when all the three optical sensors 21, 22, 23 detect the presence of the disc in a state where the disc is not chucked, a drive signal is supplied to the loading motor. The drive roller 12 is rotated to load the disc inside. Therefore, when only one or two sensors detect the presence of the disc, the loading is not performed and the disc does not enter the drive roller 12 deeper.

With this structure, the diameter is 12 cm.
When the disc is inserted from the insertion slot 2, the three optical sensors 21, 22, 23 detect the presence of all the discs, the drive signal is supplied from the loading control circuit to the loading motor, and the drive roller 12 internally drives the drive motor. It will be loaded into and chucked for playback.

When a disk D ₈ having a diameter of 8 cm shown in phantom in FIG. 1 is inserted from the insertion slot 2, three optical sensors 21, 22, 22 are arranged at a distance of at least the diameter of the disk D ₈ . 23 does not detect the presence of the disc D _{8 at} the same time, only at most two photosensors. Therefore, the loading control circuit does not supply a driving signal to the loading motor, and the diameter is 8 cm.
Discs are never loaded inside. Therefore, even if a disc having a diameter of 8 cm is mistakenly inserted from the insertion opening 2, the drive roller 12 does not rotate, and an accident that the disc having a diameter of 8 cm cannot be taken out can be prevented. Therefore, even if the reproducing device can reproduce only a disc having a diameter of 12 cm, it is not necessary to provide a mechanism for ejecting an incorrectly inserted disc having a diameter of 8 cm. Easy to configure.

In the above embodiment, when the disc having a diameter of 8 cm is inserted, the drive roller 12 is not simply driven. However, at this time, the drive roller 12 is rotated in the direction of ejecting the disc to positively drive it. It may be discharged as desired.

In the above embodiment, the three sensors 21 to 21 are used.
Although the disc diameter is discriminated at 23, the discriminating diameter can be made by using only two sensors. That is, FIG.
As shown in FIG. 2, two sensors 31, 32 are arranged between the disc insertion slot 2 of the CD player and the guide roller 11 with a value x slightly exceeding 8 cm, and these two sensors 31, 32 are arranged. The loading operation is performed only when the presence of a disk is detected at the same time. By doing so, the disk D ₈ having a diameter of 8 cm is not loaded and the disk D ₁₂ having a diameter of 12 cm is reliably loaded. Further, similarly, the determination may be made by four or more sensors.

Further, although the optical sensor is used to detect the disk in the above-described embodiment, the sensor may be detected by another sensor, and the mounting position of the sensor may be the guide roller 11 and the drive roller 12. It may be in between.

Further, in the above-mentioned embodiment, the present invention is applied to the reproducing apparatus for the compact disc, but it can also be applied to the reproducing apparatus for other disc-shaped recording medium. In this case, it is possible to restrict the insertion of a disc of a specific size in the case of a recording medium having three or more sizes.

[0023]

According to the present invention, the conveyance is controlled according to the detection states of the plurality of sensors for detecting the insertion of the disc, so that the accidental conveyance of the recording medium having a small diameter can be prevented.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a loading mechanism according to an embodiment of the present invention.

FIG. 2 is a perspective view showing the appearance of a CD player according to an embodiment of the present invention.

FIG. 3 is an explanatory view showing another embodiment of the present invention.

[Explanation of symbols]

2 Insertion port 11 Guide roller 12 Drive roller 13 Spindle motor 15 Chucking board 21, 22, 23 Optical sensor D ₈ Compact disk (diameter 8 cm)

Claims (1)

[Claims] 1. A disc-shaped recording medium transporting device for transporting a disc-shaped recording medium inserted from an insertion port to a predetermined mounting position, wherein it is detected that the recording medium is inserted near the insertion port. The plurality of sensors are arranged at a predetermined distance or more, and only when a predetermined number or more of the plurality of sensors detect the insertion of the recording medium, the conveyance to the above-mentioned placement location is performed. Disk-shaped recording medium conveying device.