JPH03134859A - Disk loading mechanism - Google Patents

Abstract

PURPOSE:To eject a foreign matter without clamping when it is inserted by arranging plural detection sensors which take a detection mode or a nondetection mode. CONSTITUTION:A detection sensor group in front of a driving roller 4 is constituted of two outside sensors A and E positioned on the most outside, a central sensor C positioned at a center and intermediate sensors B and D positioned between the sensors A and E and the sensor C. The detection sensor group consisting of the sensors A-E issues a loading and ejecting signal to a microcomputer by utilizing the pattern recognition of the sensing timing of the detection mode. Then, when all the sensors A-E take the nondetecton mode at the same time during loading, it is discriminated that there is the foreign matter other than a CD and an eject command is issued to a loading motor by the microcomputer. Then, the inserted matter is ejected. Thus, when the foreign matter other than the disk is inserted, it is discriminated and ejectd without being clamped. Thus, mechanism such as a pickup is protected.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a disc loading mechanism for loading a disc used in a compact disc player, a laser disc player, etc. This invention relates to an improvement of a disk loading mechanism that detects foreign objects.

[Prior Art] Conventionally, a CD player that reproduces a digital signal recorded on a compact disc (hereinafter referred to as a CD) is equipped with a disc loading mechanism that holds the CD and loads it into the player.

As a conventional example of such a disk loading mechanism,
An autoloading type as shown in FIG. 5 has been proposed.

That is, in the chassis 1 of the CD player, a turntable 2 is disposed on the back side, and an insertion slot 3 is formed on the front side. Further, a rotatable drive roller 4 is arranged close to the insertion opening 3.

Then, as shown in FIG. 6, the drive roller 4 and the support member 5 disposed opposite to each other sandwich the disk 6 inserted from the insertion slot 3 from above and below, and the drive roller 4 is rotated.
The disk 6 is conveyed onto the turntable 2. At this time, the outer peripheral edge of the disc 6 comes into contact with positioning guides 7 provided at two locations in front of the disc transport path, and the center hole 6a of the disc 6 is installed in the turntable 2. When suction of the disc 6 is completed, a chucking operation plate (not shown) is activated to mount the disc 6 on the turntable 2''. moreover,
Completion of the operation of the chucking operation plate (not shown) is detected by a microswitch or the like, and the loading motor (not shown) is stopped to stop rotation of the drive roller 4, thereby completing disk loading.

According to such an autoloading type disc loading mechanism, it is possible to easily mount the disc 6 on the turntable 2 simply by inserting it through the insertion slot 3. Therefore, it can demonstrate high operability even under conditions accompanied by vibrations, and is mainly used in in-vehicle audio equipment.

However, the above-mentioned conventional techniques have the following drawbacks.

Sunaichi, accidentally put a CD like a credit card.
If a foreign object smaller than the player is inserted into the insertion slot, the eject signal is not emitted, and the foreign object gets inside the player and cannot be removed. Therefore, it is not possible to insert a new CD, and this also causes damage to the pickup, spindle, etc. inside the player.

Note that such a drawback exists not only in CD players but also in autoloading type disc loading mechanisms in various disc players that use discs.

[Problems to be Solved by the Invention] As described above, in the conventional technology, foreign objects other than disks cannot be reliably identified, reducing the reliability of the device.

The disc loading mechanism of the present invention was proposed to solve the problems of the prior art as described in 1.The purpose of the disc loading mechanism is to detect when a foreign object other than a disc is inserted. , to provide an excellent disc loading mechanism that ejects without clamping and protects mechanisms such as pickup.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the disc loading mechanism of the present invention is provided with a transport means for loading the disc onto the turntable, and a disc loading mechanism is provided on the front side of the transport means. While the arranged detection sensor group is in detection mode and non-detection mode, and at least one detection sensor maintains the detection mode state, the loading signal is continuously emitted, and while the loading signal is being emitted, The present invention is characterized in that the detection sensor group emits an eject signal when all the detection sensors are in a non-detection mode.

[Function] The disc loading mechanism of the present invention as described below has the following effects:
It works as follows.

That is, while at least one detection sensor in the detection sensor group maintains the detection mode state, the insert is determined to be a disc, the loading signal is continued, and the conveying means carries the insert into the turntable. continue.

However, while the detection sensor group was transmitting loading signals,
When all the detection sensors take the non-detection mode, the detection sensor group determines that the insert is a foreign object, issues an eject signal, and the conveying means carries out the insert to the opening of the escutcheon.

As described above, according to the present invention, when a foreign object is inserted into the player, the detection sensor group determines it, issues an eject signal, and the conveyance means can eject the foreign object.

Therefore, damage to the pickup, spindle, etc. can be prevented, and the safety of the device is improved.

An embodiment of the disc loading mechanism of the present invention as described in "Embodiment 2" will be specifically described based on the drawings.

Incidentally, members similar to those in the prior art are given the same numbers and their explanations are omitted.

A. First Embodiment As shown in FIG. 1, five detection sensor groups A to E are arranged in front of the drive roller 4. These detection sensor groups include two outer sensors ASE located at the outermost positions, a central sensor C located approximately in the center of the outer sensors A and E, and an intermediate sensor B located between the outer sensors ASE and the central sensor C. , D.

Among these, the interval between the outer sensors A and E is set to be slightly wider than 8 cm. The outer sensor A is further away from the center of the turntable 2 than the outer sensor E,
The periphery of the 12 cm CD on the turntable 2 does not reach the outer sensor A. On the other hand, intermediate sensor B
, D are set shorter than 8 cm. Furthermore, the central sensor C is arranged inside the periphery of the 8 cm CD on the turntable 2.

By the way, each sensor A to E of these detection sensor groups is
As shown in Figure 2, a pair of LEDIO and a light receiving sensor 1
1, and when the light from the LEDIO reaches the light receiving sensor 11, it senses that there is no light shielding object between the two and takes a non-detection mode. On the other hand, when the light from the LEDIO does not reach the light receiving sensor 11, it is sensed that there is a light shielding object in the gap between the two, and the detection mode is set.

Furthermore, the detection sensor groups A to E issue loading/eject signals to the microcomputer, which is the loading control means, by utilizing pattern recognition of the sensing timing in the detection mode, and the microcomputer issues loading/eject commands to the loading motor. Furthermore, the drive roller 4 is configured to rotate in forward and reverse directions.

On the other hand, on the back side of the turntable 2, a stopper arm 12.
12 are arranged so as to rotate symmetrically about a support shaft 12a. Further, the stopper arm 12.12 is provided with a stopper pin 13 at its tip, with which the peripheral edge of the CD to be inserted comes into contact. In addition, the stopper arm 12
．． 12 is positioned at a position where the CD is locked to the turntable 2'' through a position regulating plate that operates by adsorption and release of a solenoid.

Furthermore, in this embodiment, when the CD suction is completed, the chucking operation plate (not shown) is activated, and the microswitch detects the operation completion position of the chucking operation plate (not shown), and the CD is removed. The loading operation is completed,
The play motion is started.

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

a. Loading start After the power is turned on, when at least one of the central sensor C or intermediate sensor D among the detection sensor group senses an insert and enters the detection mode, a loading signal is sent to the microcomputer. Therefore, the microcomputer sends a loading command to the loading motor, and the drive roller 4
rotates to pull the insert into the device.

Note that after the central sensor C or the intermediate sensor D takes the detection mode, there may be a case where the inserted object is left without reaching the drive roller 4. At this time, if the other sensors do not enter the detection mode even after a certain period of time has passed, it is determined that the insert is not able to be sucked in due to a factor such as being caught due to an abnormal shape, and the detection sensor group will transmit the loading signal. Stop. Therefore, the microcomputer stops issuing a loading command to the loading motor, and the rotation of the drive roller 4 is stopped.

Furthermore, if all the sensors in the detection sensor group are in the non-detection mode in the above state, it is determined that the left CD has been removed, and the CD is placed in a waiting state for loading.

b. Confirmation of engagement between drive roller and CD Furthermore, following the start of loading, a combination of three adjacent detection sensors, that is, detection sensors A1BSC, or BSC, D, or C, D, and E,
When each detection sensor takes the detection mode, the loading signal continues.

0 However, if the detection sensor is in the detection mode with a combination other than the one described in ``1'', or even if the predetermined time (5 seconds in this example) is exceeded, the detection sensor will be in the detection mode with the combination in ``1''. If it is not removed, it is determined that it is a foreign object other than a CD. Then, the detection sensor group stops sending the loading signal. Then, the microcomputer stops issuing a loading command to the loading motor, and the rotation of the drive roller 4 is stopped.

c. Continuous suction of CD After confirming the engagement between the drive roller 4 and the disc 6, if even one of the detection sensors A to E is in the detection mode, insert the inserted object into the disc 6. It determines that there is a loading signal and continues the loading signal. Therefore, the microcomputer continues to issue a loading command to the loading motor, and the drive roller 4 continues to rotate to draw in the disk 6.

d. Foreign object removal However, if all detection sensors A-E take the non-detection mode at the same time during loading, the detection sensor group C
It is determined that it is a foreign object other than D.

Therefore, the microcomputer issues an eject command to the loading motor, reverses the driving roller 4, and discharges the inserted material.

e. CD suction is completed, loading progresses, and only the central sensor C is in detection mode, and after a certain period of time, 8 cm
When it is sensed that the CD comes into contact with the stopper pin 13 which is regulated at the CD position, it is detected that suction of the 8 cm CD is completed.

Further, when only the outer sensor A detects that the CD comes into contact with the stopper pin 13 which is regulated to the 12 cm cD position after a certain period of time has passed while in the non-detection mode, 12 cm Detects completion of CD suction.

As described above, when the CD suction is completed, the chucking operation plate is activated, and the microswitch detects the operation completion position of the chucking operation plate 1 2 , and the CDO loading operation is completed.

In addition, in this embodiment, by utilizing pattern recognition of the detection modes of the detection sensor groups A to E, it is possible to perform the switching operation between adsorption and release of the solenoid. Therefore, the stopper pin 13 installed on the stopper arm 12 is moved 8 cm
It can be positioned at the D position and the 12cm CD position, and can detect two CDs with different standards by electrical detection means.
can be determined.

B. Second Embodiment Furthermore, the present invention is not limited to the embodiment described in item 1, but can also include the following second embodiment.

That is, as shown in FIG. 3, four front sensor groups F-1 are disposed in front of the drive roller 4, and an 8 cm CD suction completion sensor J is disposed behind the drive roller 4.

The positional relationship of the front sensor F-H group is such that the distance between the two outer sensors F and I located on the outer side is set within 12 cm, and the outer sensor F enters the non-detection mode when suction of the 12 cm CD is completed. It is placed in a position that takes Further, the two inner sensors G and H located on the inner side are both close to the drive roller 4, and the interval therebetween is set to within 3 cm. Furthermore, the inner sensors G and H are 8cmC
It is arranged at a position where it takes a non-detection mode when the suction of D is completed.

On the other hand, the back sensor J is arranged inside the periphery of the 8 cm CD set on the turntable 2, and is set to detect the completion of suction of the 8 cm CD when in the detection mode.

Note that, like the sensor of the first embodiment, the detection sensor of this embodiment has a detection mode and a non-detection mode.

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

That is, when both inner sensors G and H are in the detection mode at the same time, a loading command is issued to the drive roller 4, which rotates to draw the insert into the interior of the device 34. Then, if even one sensor among all the front sensor group F-1 is in the detection mode, the loading command is continued.

Further, when the back side sensor J is in the detection mode, if all the front sensor groups F to (2) are in the non-detection mode, it is determined that the inserted object is 3 cm CD, and suction is completed.

On the other hand, even if the rear sensor J is in the detection mode, the sensors G, H, and I of the front sensor group F-I are in the detection mode, and the outer sensor F is in the non-detection mode. Judging by this, the suction is completed.

However, before the back sensor J takes the detection mode,
If all the front sensors F to I are in non-detection mode, it is determined that the object is other than a CD, the loading command is stopped, the eject command is issued, the reversal of the drive roller 4 is stopped, and the insertion is stopped. Dispose of things.

As described above, according to this embodiment, when the CD suction is completed, the stopper pin 1
It is possible to detect the completion of loading without sensing that the CD is in contact with the CD at step 3. Therefore, the CD discrimination time can be shortened, and accordingly, foreign matter can be detected quickly.

C1 Other embodiments For example, as shown in FIG. In addition to arranging the sensor J, a rear sensor K is also installed to detect the completion of suction of the 12CD.

According to the embodiment having such a configuration, it is possible to more reliably determine that suction of 12 CDs has been completed.

Therefore, the determination time for foreign object detection is shortened, and the detection accuracy is improved.

The number of detection sensor groups to be arranged can be selected as appropriate, and instead of the front sensor groups F to ■ in the second embodiment, six detection sensor groups A to E in the first embodiment may be arranged. .

Furthermore, the positional spacing of the detection sensors can be changed as appropriate, and in each of the above-mentioned embodiments, in order to distinguish between two types of disks, the spacing between the sensors at both ends is arranged so that the distance is greater than or equal to the diameter of the small-diameter disk and less than or equal to the diameter of the large-diameter disk. However, in a player that plays one type of disc, similar effects can be expected if a detection sensor is placed at a position where it can reliably detect that the suction of the disc has been completed.

[Effects of the Invention] As described above, according to the disk loading mechanism of the present invention, when a foreign object is inserted, by the simple configuration of arranging a plurality of detection sensors that take the detection mode or the non-detection mode, An excellent disc loading mechanism can be provided that allows ejection without clamping.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the first embodiment, Fig. 2 is a side view of main parts of the present embodiment, Fig. 3 is a plan view of the second embodiment, and Fig. 4 is a plan view of other embodiments. 5 and 6 are a plan view and a side view of a conventional example. 1... Chassis, 2... Turntable, 3...
Insertion port, 4... Drive roller, 5... Support part shrine, 6...
...Disk, 7...Guide, 10...LED, 1
1... Light receiving sensor, 12... Stopper arm, 13
...stopper pin, A-K...detection sensor. 7 8

Claims (1)

[Scope of Claims] In a disc loading mechanism equipped with a transport means for loading a disc onto a turntable, a detection sensor is provided on the front side of the transport means and has a detection mode and a non-detection mode and generates a loading/eject signal. While the group is arranged and at least one detection sensor in the detection sensor group is in the detection mode, the loading signal is continuously emitted, and while the loading signal is being emitted, all the detection sensors are in the non-detection mode. A disk loading mechanism characterized by comprising a group of detection sensors that emit an eject signal when the disk is removed.