JP2803862B2 - Disc loading mechanism - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a disk mounting apparatus for mounting a disk on which an optical signal is recorded in a device, and particularly to a disk mounting device which is installed on disks having different standards. The present invention relates to an improvement in a disk loading mechanism for detecting a single adapter adapted to a disk of a certain standard.

2. Description of the Related Art Conventionally, a CD player for reproducing a digital signal recorded on a compact disk (hereinafter, referred to as a CD) is provided with a disk loading mechanism for holding a CD and mounting the CD inside the player.

Conventional examples of such a disk loading mechanism include a type in which a disk holder is simply opened by opening and closing the disk and the disk is mounted on a turntable, and a slide in which a disk is mounted on a slider that can move back and forth and mounted on the turntable. Loading types and the like are known.

Incidentally, CD players are also being developed as in-vehicle audio devices. However, in the in-vehicle audio equipment, it is difficult for the above-described disk loading mechanism to mount a disk due to vibrations during running or the like.

Therefore, a disk loading mechanism as shown in FIG. 6 has been conventionally proposed.

That is, in the chassis 1 of the CD player, the drive roller 4 is arranged on the insertion port 3 side of the turntable 2. Then, as shown in FIG. 7, the drive roller 4 and the support member 5 arranged opposite to each other allow the disk 6 inserted through the insertion slot 3 to be inserted.
, From above and below, the drive roller 4 is rotated, and the disk 6 is conveyed onto the turntable 2. At this time, the front outer edge of the disc 6 is in contact with the positioning guides 7 provided at two places in front of the transport path, so that the center hole 6a of the disc 6 is positioned on the turntable 2. Thereafter, the transport roller 4 is moved down by an unillustrated elevating means, whereby the disk 6 is lowered onto the turntable 2 and clamped by a not-shown clamping means (play state).

According to the above-described conventional example, it is possible to easily mount the disk 6 on the turntable 2 simply by inserting the disk 6 from the insertion opening 3.

On the other hand, in recent years, with the diversification of consumer needs, in addition to the existing 12cm standard CD, in addition to the existing 12cm standard CD, it is equivalent to a 17cm single disc of analog disk, so-called 8cm standard small CD called so-called Are manufactured and popular. However, in the conventional example described above, 12
Since only cmCD was supported, when using an 8cmCD, a special adapter had to be attached to the 8cmCD to make it the same as the 12cm disc standard, and then used.

For this reason, the following disadvantages have been pointed out in the above-described conventional techniques.

That is, if only an adapter for 8 cm CD is inserted by mistake, the eject signal is not emitted and the device enters the player and causes a failure of the pickup or the like.

[Problems to be Solved by the Invention] As described above, in the related art, the 8 cm CD adapter cannot be reliably determined.

The disc loading mechanism of the present invention has been proposed in order to solve the above-mentioned problems of the related art, and its purpose is to eject an 8 cm CD adapter without clamping when the adapter is inserted, An object of the present invention is to provide an excellent disc loading mechanism for protecting a mechanism such as a pickup.

[Means for Solving the Problems] In order to solve the above problems, the disk loading mechanism of the present invention takes a detection mode or a non-detection mode in the vicinity of a conveyance unit for loading a disk onto a turntable. A detection sensor group is provided, and the detection sensor group is disposed in a first detection sensor group having an interval slightly shorter than the diameter of the large-diameter disc and in a gap between the first detection sensor group, and the interval is set to a small-diameter disc. A second detection sensor group set shorter than the diameter of
At the same time that the first detection sensor group takes the detection mode,
When the detection sensor group takes the non-detection mode, the insert is a detection sensor group that determines that the adapter is an adapter for adapting a small-diameter disk to a large-diameter disk size.

[Operation] The disk loading mechanism according to the present invention as described above,
It works as follows.

In other words, when a large-diameter disk is inserted, the first detection sensor group having an interval slightly shorter than the diameter of the large-diameter disk and the second detection sensor group disposed in the gap are detected. Take the mode. At this time, the detection sensor group determines that the inserted object is a large-diameter disk, and issues a loading instruction for the large-diameter disk to the transport means.

On the other hand, when a small-diameter disk is inserted, at least one position of the first detection sensor group is in the non-detection mode. In this case, the detection sensor group determines that the inserted object is a small-diameter disk, and issues a loading instruction for the small-diameter disk to the transport unit.

Furthermore, if the adapter alone is inserted by mistake,
Takes the detection mode, and at the same time, the second detection sensor group takes the non-detection mode. That is, the first detection sensor group takes a detection mode by the outer peripheral edge of the adapter, but the second detection sensor group having an interval shorter than the diameter of the small-diameter disc has a hole for fitting the small-diameter disc at the center of the adapter. Since it is formed, it does not take the detection mode. In such a case, the detection sensor group can determine that the insert is an adapter alone.

Therefore, according to the present invention, when the adapter alone is inserted into the device, the detection sensor group determines the insertion, gives an ejection command to the transporting means, and discharges the adapter. Therefore, the safety of the device is improved without damaging the pickup or the like.

Embodiment An embodiment of the disk loading mechanism of the present invention as described above will be specifically described with reference to the drawings.

Note that the same reference numerals are given to members similar to those in the related art, and description thereof is omitted.

That is, as shown in FIG.
The three detection sensor groups are close to the drive roller 4 and the insertion port 3
It is arranged on the side. These detection sensor groups include two outermost sensors A and E located at the outermost positions, a central sensor C located substantially at the center of the outer sensors A and E, and a central sensor C located between the outer sensors A and E and the central sensor C. Intermediate sensor B,
D. In the left-right direction, the distance between the outer sensors A and E is 8 cmCD.
It is set slightly wider than the diameter. Also, the sensor A
Is farther from the center of the turntable 2 than the sensor E, and when a 12 cm CD is set on the turntable 2,
The outer circumference of the cmCD is set so as not to reach the end sensor A.

As shown in FIG. 2, each of the sensors A to E of the detection sensor group includes a pair of LEDs 10 and a light receiving sensor 11, and when light from the LED 10 reaches the light receiving sensor 11, The non-detection mode is set by sensing that there is no light-shielding material in the gap between. Meanwhile, LED1
When the light from 0 does not reach the light receiving sensor 11, the detection mode is set by detecting the presence of a light blocking object in the gap between the two.

Furthermore, the detection sensor groups A to E use the pattern recognition of the detection timing in the detection mode to make the 12 cm CD
Mode ・ 8cmCD mode command is issued to hold and release the suction of solenoid (not shown), and
An ejection command is given to the loading motor so that the drive roller 4 rotates in the forward and reverse directions.

Incidentally, the solenoid is connected to the stopper arms 12, 12 via a rotatable position regulating plate (not shown). If the CD to be inserted is an 8 cm CD, the solenoid sucks and holds the stopper arms 12, 12, and the CD to be inserted is 12 cm.
In the case of CD, by releasing the adsorption of the solenoid,
The drive roller 4 feeds the CD to the back of the device.

On the other hand, behind the turntable 2, a gear 12 at the base end is provided.
The stopper arms 12, 12 connected by b are arranged so as to rotate symmetrically about the support shaft 12a. Further, the stopper arms 12, 12 are provided with stopper pins 13 at the distal ends. Then, the stopper arms 12, 12 are moved through a position regulating plate that operates by suction and release of the solenoid,
The CD is positioned at a position where the CD is locked on the turntable 2.

Further, in this embodiment, when the suction of the CD is completed, the chucking operation plate (not shown) is activated, the operation completion position of the chucking operation plate (not shown) is detected by the micro switch, and the CD is read. The loading operation is completed, and the playing operation is started.

The operation of the present embodiment having the above configuration is as follows.

a. Start of loading After the power is turned on, as shown in FIG.
When at least one of the center sensor C and the intermediate sensor D in E detects the insert and takes the detection mode, a loading command is issued, and the driving roller 4 rotates so as to draw the insert into the apparatus. At the same time, the 8cmCD mode command is issued to the solenoid, and the solenoid performs the suction operation,
By rotating the position regulating plate, the stopper arm 12 is regulated to the 8 cm CD position.

c. Determination of 12 cmCD By the way, as shown in FIG. 4, during the loading operation, when the outer sensors A and E simultaneously take the detection mode, it is determined that the insert is a 12 cmCD. At this time, the detection sensor issues a 12 cmCD mode command to the solenoid, the adsorption of the solenoid is released, and the restriction of the position restriction plate is released. Therefore, the stopper pin 13 is pressed by the insert,
The stopper arms 12, 12 are symmetrically rotated by the gear 12a. Therefore, the stopper pin 13 moves backward from the 8 cm CD position.

c. As shown in FIG. 5, when the outer sensors A and E are in the detection mode and the remaining detection sensors B, C and D are in the non-detection mode as shown in FIG. Adapter unit 14 is determined. That is, since the 8 cm CD adapter 14 has an opening for fixing the 8 cm CD near the center, the three detection sensors on the central side may take the non-detection mode at the same time. B,
It is impossible for C and D to take the non-detection mode at the same time. Therefore, in the case of the mode pattern as described above,
An ejection command is issued to the loading motor, the drive roller 4 is inverted, and the 8 cm CD adapter 14 is ejected from the insertion slot 3.

d. Determination of completion of suction of 8 cm CD By the way, during the loading operation in the 8 cm CD mode, only the center sensor C takes the detection mode, and the other detection sensors A,
If the insert is in contact with the stopper pin 13 after a certain period of time while B, D, and E are all in the non-detection mode, the insert is determined to be 8 cmCD and the completion of suction of 8 cmCD is detected. Then, the clamp operation is performed.

e. 12cmCD suction completion judgment On the other hand, when the solenoid is released and the stopper pin 13 retreats a certain stroke due to the pressing force of the insert,
The stopper arm 12 engages with the position regulating plate, and positions the stopper pin 13 at the 12 cm CD position. Then, in a state where only the outer sensor A is in the non-detection mode and the other outer sensor E and the center sensor C are in the non-detection mode, after a lapse of a certain time, when the insert is in contact with the stopper pin 13,
This insert is determined to be a 12 cm CD, and the completion of suction of the 12 cm CD is detected to perform a clamping operation.

When the 8 cm CD adapter 14 is used, depending on the adapter, the slit 14 a is provided near the center, so that the light of the LEO 10 leaks from this slit 14 a and the intermediate sensors B and D switch to the non-detection mode. There is a risk of taking it. Therefore, the modes of the intermediate sensors B and D are ignored, and the completion of the suction of the 12 cm CD is determined only by the detection sensors A, C and E.

Further, the disk loading mechanism of the present invention is not limited to the above-described embodiment, and the number of detection sensors can be appropriately selected.

[Effects of the Invention] As described above, according to the disk loading mechanism of the present invention, a simple configuration in which a plurality of detection sensor groups in the detection mode or the non-detection mode are arranged close to the transport unit, Thus, it is possible to provide an excellent disc loading mechanism capable of accurately determining and ejecting the 8 cm CD adapter and protecting the player.

[Brief description of the drawings]

1 and 3 to 5 are plan views of this embodiment, FIG. 2 is a side view of a main part of this embodiment, and FIGS. 6 and 7 are plan and side views of a conventional example. . DESCRIPTION OF SYMBOLS 1 ... Chassis 2 ... Turntable 3 ... Insertion opening 4 ... Drive roller 5 ... Support member 6 ... Disk 7 ... Guide 10 LED 11 Light receiving sensor 12
…… Stopper arm, 13 …… Stopper pin, 14 …… 8cmC
Adapter for D, AE ... Detection sensor.

Claims (1)

(57) [Claims] 1. A disk loading mechanism comprising a transport means for loading a disk onto a turntable and a group of detection sensors in a detection mode or a non-detection mode in proximity to the transport means, wherein the detection sensor group is large. A first detection sensor group having an interval slightly shorter than the diameter of the diameter disc; and a second detection sensor group disposed in a gap between the first detection sensor groups and having an interval shorter than the diameter of the small diameter disc. And when the first detection sensor group is in the detection mode and the second detection sensor group is in the non-detection mode, the insert is a single adapter adapting the small-diameter disk to the large-diameter disk size. A disc loading mechanism, which is a group of detection sensors for determining that there is a disc loading mechanism.