JP2000163840A - Disk discriminating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a disk from erroneous discriminating by preparing plural photodetecting means which is light shielded with a disk inserted into a disk inserting inlet, a controller and a light shielding means and shielding light which is leaked from a slit of an adapter holding small diameter disk in the central part by means of a light shielding means. SOLUTION: When a disk holding a 8 cm-CD in the center of an adapter is inserted, since a pin 12 is slid in the left direction with the outer peripheral part of the adapter, a small hole 8A in an upper base 6 is clogged with a sliding plate 9, and light which passes through the slit of the adapter is shielded with the sliding plate 9. Thus, loading is continued even in the case of inserting the disk holding the 8 cm-CD in the center of the adapter. When the 8 cm-CD which is held with the adapter having the slit is inserted in the case of inserting a 12 cm-CD, loading is continued and the 8 cm-CD is transferred up to a tray within a casing, while the 8 cm-CD is discharged when the 8 cm-CD the clamp area of which is coated or the adapter not holding the 8 cm-CD is inserted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc player for reproducing information recorded on a disc such as a CD (compact disc) and a disc discriminator used for a disc discriminator used in a disc changer.

[0002]

2. Description of the Related Art Heretofore, there has been known a disc changer device which discriminates a size of a disc inserted into a disc insertion slot and transfers only a proper disc to a predetermined position in the apparatus by a loading mechanism. For example, discriminating between 8 cm CD and 12 cm CD,
This 12 cm CD is loaded only when insertion of D is detected, and 8c CD is detected when insertion of 8 cm CD is detected.
Mechanisms for ejecting mCD are known.

FIG. 10 shows an adapter holding an 8 cm CD at the center and having the same outer diameter as a 12 cm CD. FIG.
In FIG. 1, reference numeral 1 denotes a ring-shaped adapter made of resin, and a hole 2 is formed in the center of the adapter 1. Reference numeral 3 denotes a disk holding piece formed at the edge of the hole 2, and the outer peripheral portion of the 8 cm CD is held by the disk holding piece 3. Reference numeral 4 denotes slits formed in the adapter 1, and by forming these slits 4, the disk holding piece 3 having flexibility is configured. By forming the slits 4 in the adapter 1 and making the disc holding pieces 3 flexible, 8c
mCD can be easily held.

Conventionally, when a 12 cm CD is detected, the 12 cm CD is transferred into the apparatus by a loading mechanism, and when an 8 cm CD is detected, the 8 cm CD is detected.
D is ejected, but an adapter 1 holding an 8 cm CD
A disc discriminating device is known in which when a is detected, the disc is transferred into the device by a loading mechanism, similarly to a 12 cm CD.

However, in the above-mentioned conventional disc discriminating apparatus, particularly in a disc discriminating apparatus for discriminating an inserted disc with a plurality of photocouplers, light is transmitted through a slit formed in the adapter 1, so that an erroneous discrimination may occur. there were.

FIG. 11 shows an 8 cm CD. Normal 8
In the case of the cmCD, the hole edge X (clamp area) of the center hole is transparent, but there is one in which the clamp area X is painted, and when an 8 cmCD coated with the clamp area is inserted. Was erroneously determined to be a 12 cm CD.

[0007]

As described above, in the conventional disc discriminating apparatus, when an adapter holding a small-diameter disc is inserted at the center, the slit is formed in the adapter or the clamp area is painted. There was a problem of erroneous determination.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a disc discriminating apparatus which does not erroneously judge by a slit of an adapter or by painting a clamp area.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned conventional problems, the present invention is characterized in that light shielding means for shielding light leaking through a slit of an adapter is provided. It is possible to prevent erroneous disc determination due to light leaking through the slit.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION
A plurality of light detection units that are shielded by a disk inserted into the disk insertion slot; a control unit that controls loading of the disk based on detection results of the plurality of light detection units; Light-shielding means driven by a disk to shield at least one of the plurality of light detection means, wherein light leaking from a slit of an adapter holding a small-diameter disk at the center is shielded by the light-shielding means. This can prevent erroneous disc determination due to light leaking from the slit of the adapter.

According to a second aspect of the present invention, there is provided a control device for controlling forward and reverse rotations of a disc loading roller based on detection results of a plurality of light detecting means. In addition, since the normal rotation and the reverse rotation of the roller are controlled, the configuration of the control means is simplified.

The invention according to claim 3 of the present invention is characterized in that a small diameter disc having a clamped area in the center hole is discriminated based on the detection results of the plurality of light detecting means. This prevents erroneous determination of a small-diameter disk having a painted clamp area as a large-diameter disk.

According to a fourth aspect of the present invention, an adapter having a large-diameter disk or a small-diameter disk held at the center thereof is distinguished from an adapter having a small-diameter disk or a small-diameter disk not held at the center thereof. In this configuration, only a large-diameter adapter holding a small-diameter disk or a small-diameter disk in the center is loaded, and only a large-diameter disk and an adapter are targeted. Therefore, the configurations of a disk player and a disk changer are simplified.

According to a fifth aspect of the present invention, the first light detecting means is disposed substantially at the center in the width direction of the disk insertion port, and the first light detecting means is disposed at the end of the disk insertion port in the width direction. 2 light detection means, and a third light detection means disposed deeper than the first and second light detection means. It is possible to make a determination.

An embodiment of the present invention will be described below with reference to the drawings. (Embodiment 1) Embodiment 1 is most suitable as a disc discriminating apparatus of a disc changer apparatus described in Japanese Patent Application No. 10-215245 filed by the same applicant. FIGS. 1 and 2 show a disc insertion portion of the first embodiment. 1 and 2, reference numeral 5 denotes a lower substrate fixed to a casing of the disc changer device. An upper substrate 6 is rotatably supported by the lower substrate 5. A space between the upper substrate 6 and the lower substrate 5 serves as a disk insertion port.

The upper substrate 6 is rotated by being driven by an opening / closing mechanism (not shown), and opens and closes a disk insertion opening. 7A and 7B are light receiving elements mounted on the lower substrate 5, the light receiving element 7A is disposed on the left end side in the width direction of the disk insertion slot, and the light receiving element 7B is disposed substantially at the center of the disk insertion slot in the width direction. ing. 8A and 8B are small holes formed in the upper substrate, 9 is a sliding plate held on the upper surface of the upper substrate 6 so as to be slidable left and right.
And a large hole 10B. Reference numeral 11 denotes a spring having one end locked to the upper substrate 6 and the other end locked to the sliding plate 9. The elastic force of the spring 11 urges the sliding plate 9 rightward in FIG. I have.

Reference numeral 12 denotes a pin implanted at one end of the slide plate 9, and the pin 7 protrudes into the disc insertion opening via a cutout of the upper substrate 6. 12cmC in the disc insertion slot
D, When the 8 cm CD held by the adapter 1 is inserted, or when the 8 cm CD is inserted from the left side of the disc insertion slot, the pin 7 is driven by the inserted disc, and the sliding plate 9 is moved leftward (see FIG. 2), the small hole 8A formed in the upper substrate 6 is closed by the sliding plate 9.

On the other hand, the small holes 8B of the upper substrate 6 are not closed by the large holes 10B of the sliding plate 9. 13A, 13B
Is a light-emitting element mounted on a casing (not shown) of the disc changer device. The first light-emitting element 13A and the light-receiving element 7A constitute a first disk detection device. The light-emitting element B and the light-receiving element 7B are used. A second disk detection device is configured.

Reference numeral 14 denotes a disk transfer roller for transferring the disk inserted from the disk insertion port into the apparatus or discharging the disk in the apparatus outside the apparatus. 13
C denotes a light-emitting element disposed at the back of the disc insertion slot, and a light-receiving element 7C (not shown) is disposed to face the light-emitting element 13C.
(Not shown) constitutes a third disk detecting device. Reference numeral 15 denotes a lever rotatably supported by a shaft 16 inside the housing, and a roller 17 to which a disc abuts is rotatably held at the tip of the lever 15. The lever 15 is urged clockwise (FIG. 2) by a spring.

A projecting piece 15A is integrally formed on the lower surface of the lever 15, and a light emitting element 13D and a light receiving element 7D are provided on the housing.
Is provided. When the roller 17 is pushed by the disk 18 transferred into the apparatus by the roller 14 and the lever 15 rotates, the lever 1
The protruding piece 15A on the lower surface of 5 enters and exits between the light emitting element 13D and the light receiving element 7D of the fourth disk detecting device, and it is detected that the disk has been transferred to a predetermined position.

FIG. 3 shows a loading control device according to the first embodiment. In FIG. 3, 7A, 7B, 7C, 7
D is the light receiving element, 19 is the light receiving element 7A, 7B, 7
A disc discriminating circuit for discriminating a disc from the outputs of C and 7D. The disc discriminating circuit 19 comprises a microcomputer or the like. Reference numeral 20 denotes a loading mechanism controlled based on the determination result of the disk determination circuit 19. The loading mechanism includes the roller 14, a motor for driving the roller 14, a speed reduction mechanism, and the like. , By reversing,
The disk 18 is transferred into the apparatus, and the disk 18 is ejected outside the apparatus.

Next, the disc discriminating operation of the first embodiment will be described. FIG. 8 shows the light receiving element 7 of the first, second, third, and fourth disk detection devices during disk loading.
Outputs of A, 7B, 7C, and 7D are shown. In each output of the light receiving elements 7A, 7B, and 7C in FIG. 8, "H" indicates a state in which light from the light emitting elements 13A, 13B, and 13C to the light receiving elements 7A, 7B, and C is blocked by the disk 18 by the disk 18, or a lever. The 15 projections 15A are light emitting elements 13D.
And a light-shielded state between the light-receiving element 7D and
“L” indicates a state in which light from the light emitting elements 13A, 13B, 13C, and 13D is received by the light receiving elements 7A, 7B, 7C, and 7D.

FIG. 9 shows a disc loading processing flow. In FIG. 9, the disc 18 is inserted into the disc insertion slot, and the light receiving element 7A or 7B is
When the light is changed from "L" to "H" by light shielding by 8, the loading motor starts rotating and loading is started. In step 1 of FIG. 9, a timer is set. In step 2, it is determined whether or not the timer has timed out.

If it is determined in step 2 that the timeout has not occurred, the process proceeds to step 3, where it is determined whether or not the disk 18 has been removed. If it is determined that the disk 18 has been removed, the process proceeds to a disk insertion waiting process in which the disk 18 is pulled out. If it is determined that it has not been removed, the process proceeds to step 4. Step 4
Then, it is determined whether or not the disk 18 has reached the determination point 1.

The judgment point 1 is a point where the light receiving element 7C is shielded from light by the disk 18 as shown in FIG. If it is determined that the disk 18 has reached the determination point 1, if the outputs of the light receiving elements 7A and 7B are both "H" in step 5, an 8 cm CD in which a 2 cm CD is inserted or a clamp area is painted is applied. It is determined that the disc is inserted to the left of the disc insertion slot, and the loading operation is continued. On the other hand, if both the outputs of the light receiving elements 7A and 7B are not “H” in step 5, the adapter 1 in which the 8 cm CD is inserted or the 8 cm CD is not held
Is determined to have been inserted, and the disc is ejected.

In step 6, it is determined whether or not the timer has timed out. If it is determined that the time has expired, the process proceeds to retry processing. If it is determined that the time has not expired, it is determined in step 7 whether or not the disk has been pulled out.
If it is determined that the disk has been removed, the process proceeds to a disk insertion waiting process. If it is determined that the disk has not been removed, the process proceeds to step S8. In step 8, it is determined whether or not the disk has reached the determination point 3.

The judgment point 3 is a position where the roller 17 of the lever 15 is pushed by the disk 18 transferred by the roller 14, and the projecting piece 15A of the lever 15 enters between the light emitting element 13D and the light receiving element 7D to shield the light. At point 3, the light receiving element 7C is "H", the light receiving element 7B is "H" at the determination point 1, and the light receiving element 7D is "H" and the light receiving element 7A is "H" after detecting "H" of the light receiving element 7A. ”Is detected, the loading is continued.

If it is determined in step 8 that the disk has not reached the determination point 3, the process proceeds to step 9 where a disk determination is made at the determination point 2. In the determination at the determination point 2, the light receiving element 7C =
“H”, light receiving element 7B = “H”, light receiving element 7A = “H”
Is detected and before the detection point 3 is detected, the light receiving element 7A is detected.
= "L" and the light receiving element 7B = "H" detected, the loading disc has a clamp area painted 8
It is determined that the cmCD has been inserted from the left side of the disc insertion slot, and a discharging process is performed.

If "No" is determined in step 9, the process returns to step 6. If it is determined in Step 8 that the determination point has been reached, it is determined in Step 10 whether or not a timeout has occurred. In Step 11, it is determined whether loading has been completed. If it is determined that loading has been completed, this processing ends.

FIGS. 8 (a), 8 (b), 8 (c) and 8 (d) show 12c
Light receiving elements 7A, 7B, 7C, 7 when mCD is inserted
The output of D is shown. At determination point 1, when the disk is detected by the light receiving element 7C, the loading is continued because the light receiving elements 7A and 7B are "H", and the light receiving elements 7A and 7B are both "H" at the determination point 2. ,
The loading is continued, and the light receiving element 7
Since A and 7B are "H", loading is continued.

FIG. 8 (e) shows the center of the adapter 1 at 8 cm.
This is the output of the conventional light receiving element 7A when a disc holding a CD is inserted. At decision point 1, light leaks from the slit 4 of the adapter 1 and is received by the light receiving element 7A. Without being discharged. However, in the first embodiment, 8
When the disc holding the cmCD is inserted, the pins 12 are driven by the outer peripheral portion of the adapter 1 and the sliding plate 9 slides to the left in FIG.
The small holes 8A are closed, and the light passing through the slits 4 of the adapter 1 is blocked by the sliding plate 9.

For this reason, 8 cm C
Even when the disk holding D is inserted, the output of the light receiving element 7A becomes the same as shown in FIG. 8A, and the loading is continued. FIG. 8F shows the output of the light receiving element 7A when an 8 cm CD disk having a painted clamp area is inserted to the left of the insertion slot.
Since the light receiving element 7A becomes "L" at the determination point 2, the discharging process is performed.

As described above, according to the first embodiment, 12
When the cmCD is inserted, and when the 8 cmCD held by the adapter 1 having the slit 4 is inserted, the loading is continued and transferred to the tray in the housing, whereas the clamp area is painted on the 8 cmC.
When D is inserted from the left side of the insertion slot, and 8cmC
When the adapter 1 that does not hold D is inserted, it is ejected.

[0034]

The present invention has the above-described configuration, and according to the first aspect of the present invention, it is possible to prevent erroneous determination of a disk due to light leaking from a slit of an adapter. According to the second aspect of the present invention, since the normal rotation and the reverse rotation of the roller are controlled, the configuration of the control means is simplified. According to the third aspect of the present invention, it is possible to prevent a small-diameter disk having the center hole clamp area painted thereon from being erroneously determined as a large-diameter disk. According to the fourth aspect of the present invention, since only the large-diameter disk and the adapter are targeted, the configurations of the disk player and the disk changer are simplified. According to the fifth aspect of the present invention, it is possible to discriminate various kinds of disks with a small number of light detecting means.

[Brief description of the drawings]

FIG. 1 is a top view of a main part of a disc identification device according to a first embodiment of the present invention.

FIG. 2 is a front view of a main part of the disk discriminating apparatus according to the first embodiment;

FIG. 3 is a block diagram of a disk discriminating apparatus according to the first embodiment;

FIG. 4 is a top view of a main part of the disk discriminating apparatus according to the first embodiment;

FIG. 5 is a front view of a main part of the disk discriminating apparatus according to the first embodiment;

FIG. 6 is a top view of a main part of the disc identification device according to the first embodiment;

FIG. 7 is a front view of a main part of the disk discriminating apparatus according to the first embodiment;

FIG. 8 is an operation explanatory diagram of the first embodiment.

FIG. 9 is a flowchart of the first embodiment.

FIG. 10 is a top view of the adapter used in the first embodiment.

FIG. 11 is a top view of a small-diameter disk.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Adapter 2 hole 3 Disc holding piece 4 Slit

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Akira Matsumoto 4-3-1 Tsunashimahigashi, Kohoku-ku, Yokohama-shi, Kanagawa F-term (reference) in Matsushita Communication Industrial Co., Ltd. 5D046 AA12 AA16 CA16 CB03 CD03 FA04 GA02 GA06 GA15 HA10

Claims (5)

[Claims] A plurality of light detecting means which are shielded by a disk inserted into a disk insertion opening; a control means for controlling loading of the disk based on a detection result of the plurality of light detecting means; Light shielding means driven by a disk inserted in the mouth to shield at least one of the plurality of light detection means, wherein light leaking from a slit of an adapter for holding a small diameter disk at the center is shielded by the light shielding means. A disc discriminating device. 2. The disc discriminating apparatus according to claim 1, further comprising control means for controlling forward and reverse rotations of a disc loading roller based on detection results of the plurality of light detecting means. 3. A disc discriminating apparatus according to claim 1, wherein a disc having a small diameter coated with a clamp area in the center hole is discriminated based on a result of detection by the plurality of light detecting means. 4. An adapter having a large-diameter disk or a small-diameter disk held in the center and an adapter having a small-diameter disk or a small-diameter disk not held in the center are discriminated. 2. The disk discriminating apparatus according to claim 1, wherein only the loaded adapter is loaded. 5. A first light detecting means disposed substantially at the center in the width direction of the disc insertion opening, a second light detecting means disposed at an end portion in the width direction of the disc insertion opening, and 1,
3. The disk discriminating apparatus according to claim 1, further comprising third light detecting means disposed behind the second light detecting means.