JPH02232855A - Disk reproducing device - Google Patents

Abstract

PURPOSE:To surely place and fix a disk on a turn table by providing a centering mechanism positioning the disk at the center of the disk slot. CONSTITUTION:The centering mechanism 12 allowing the disk of small diameter 106 to be positioned at the center of the disk slot 2 is provided in the vicinity of the disk slot 2 inside of a frame. This mechanism 12 is provided with a pair of centering arms 13 and 14 in the vicinity of both sides of the slot 2, and further a centering lever 15 is also provided. The arms 13 and 14 are almost L-shaped, provided with front edge parts 13a, 14b and side edge parts 13b, 14b as an contacting section against the disk 106, and supported on the frame swivelling around the supporting pins 16 and 17 provided on central parts 13c and 14c between the front edge parts and the side edge parts. The front edge parts 13a and 14a are provided to extend to the slot 2, center ring pins 18 and 19 are attached to this front edge parts 13a and 14a, and this pins 18 and 19 are arranged at central positions P and P almost trisecting length of the slot 2, evenly.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a disc reproducing device with a centering mechanism that positions the disc at the center of the disc insertion slot when the disc is inserted into the disc insertion slot of a disc playback device. The present invention relates to a disc playback device.

[Conventional technology]

In recent years, disc-shaped compact discs (hereinafter simply referred to as discs) have been developed in which analog sound is converted into digital signals and pits corresponding to the digital signals are formed in the recording layer. This disc optically reproduces analog sound using a laser beam irradiated from a read head of a CD player. Furthermore, since this disc provided dramatically superior sound quality and operability compared to conventional LP records, it rapidly became popular along with CD players. Therefore, CD players especially for use in vehicles have been developed, and examples of such in-vehicle CD players include the one shown in FIG. 9. In the same figure, the reference numeral 101 indicates a diameter of 12c.
It is a disc-shaped disc with a diameter of 1.5 m, on which music is recorded. When this disc 101 is inserted into the disc insertion slot 102, the loading mechanism 103 moves it to a predetermined position (CD
(approximately the center position of the player), and is fixed on the turntable 105 by the clamper arm 104 at this predetermined position. Disc 10 on turntable 105
1 is rotated by a spindle motor (not shown),
Music recorded on the disc 101 is being played back by a read head (not shown).

By the way, it corresponds to a conventional single record and has a diameter of 12
A disk 106 with a diameter of 8 mm, which is much smaller in diameter than the conventional disk 101, has been developed.

(Problem to be Solved by the Invention) However, in such a conventional CD player, the disc insertion slot 102 is formed to fit the disc 101 with a diameter of 12, so the small diameter disc 106 is If you try to insert the disc into the disc insertion slot 102, it will be difficult to insert it into the center because the opening of the disc insertion slot 102 is wide.Especially in the case of a car-mounted CD player, because the disc will vibrate while the vehicle is running. Furthermore, it becomes even more difficult to insert the small-diameter disk 106 into the center of the disk insertion slot 102.

Therefore, a centering mechanism that positions the disc 106 at the center of the disc insertion slot 102 even if the disc 106 is inserted unevenly is installed in the disc insertion slot 102.
It is conceivable to arrange it near 02.

On the other hand, a double insertion prevention member 108 is rotatably disposed near the disc insertion slot 102 to prevent a new disc from being inserted when one disc is in the player. The member 108 is the loading mechanism 1
It is driven by an opening/closing mechanism 107 provided on the opposite side of 03. Therefore, while the CD player is in use, the double insertion prevention member 108 is driven by the opening/closing mechanism 107 to close the disc insertion slot 102 and prevent another disc from being accidentally inserted twice into the disc insertion slot 102. is prevented.

Therefore, if the double insertion prevention member 108 and its opening/closing mechanism 107 are provided separately in addition to the centering mechanism in this CD player, the overall mechanism of the CD player will become complicated and the cost will increase, and the reliability of operation will be reduced. There was a problem in that it was difficult to secure.

In view of the above, the present invention has been designed to enable the centering mechanism to insert the discs 101 and 106 into the center of the disc insertion slot 102 even if the in-vehicle disc playback device vibrates, for example, while the vehicle is running; It is an object of the present invention to provide a disc playback device that utilizes this centering mechanism to prevent double insertion of discs.

[Means to solve the problem]

In view of the above, the present invention has been developed to operate a clamper arm so that when a disc is inserted into a disc insertion slot and the disc reaches a predetermined position in a player, the disc operates a clamper arm through a link mechanism to hold the clamper arm in an upper position. In a disc playback device that operates a mechanism to lower a clamper arm to fix a disc on a turntable and rotate the turntable to play back recorded information, the disc playback device is provided at the disc insertion slot, It has a centering mechanism for guiding the inserted disc to the center of the disc insertion slot, and the centering mechanism is swingably provided at intervals in the disc insertion slot, and the centering mechanisms are swingably provided at intervals in the disc insertion slot. Two centering arms each having abutting portions that face and abut the circumferential edges of the disks, and the circumferential edges of the disks connected to and inserted into these two centering arms simultaneously abut the abutting portions of the two centering arms. , when trying to swing them in the direction in which they open from each other, the rocking movement is possible, and when the periphery of the inserted disk contacts only the abutting part of one centering arm, the centering arm's a centering lever that operates to lock rocking; a lock portion that locks movement of at least one member of the centering arm and the centering lever is formed in the link mechanism; The centering mechanism is configured to be locked as the link mechanism operates when the player is inserted into a predetermined position.

[Effect]

For example, since an in-vehicle disc playback device is installed on the front panel of a vehicle, the in-vehicle disc playback device also vibrates while the vehicle is running. Therefore, in order to insert a disc into the disc slot, it must be positioned at the center of the disc slot, and special care must be taken when inserting a small-diameter disc into the center of the disc slot. There is. However, since a centering mechanism is provided near the disc insertion slot, the disc can be easily positioned at the center of the disc insertion slot without being biased.

On the other hand, when the disc reaches a predetermined position in the player, the peripheral edge of the disc operates the clamper arm operating mechanism via the link mechanism, but at this time, the locking portion of the link mechanism locks the movement of the centering arm or centering lever. Therefore, when the disc is fixed to the turntable, even if you accidentally try to insert another disc into the disc insertion slot, the centering arm's swing will be locked and the abutment at the tip of the centering arm will prevent the other disc from being inserted. insertion is prevented.

〔Example〕

Embodiments of the present invention will be described below based on the drawings. 1 to 8 are diagrams showing an embodiment of a CD player according to the present invention.

First, the configuration will be explained.

In FIG. 1, reference numeral 1 indicates an in-vehicle CD to which the present invention is applied.
This is a casing for a player, and the front surface of this casing 1 is provided with a disc insertion slot 2 for inserting a disc. A frame 3 is housed within the casing 1, and the frame 3 has a substantially flat top plate 3a and side plates 3b, 3b whose sides are bent downward. Furthermore, a support frame 4 as shown in FIG. 2 is disposed inside the frame 3, and a playback device (not shown) for playing back music recorded on the disc is mounted on this support frame 4. It is installed in Nakao. The support frame 4 is supported in a floating manner on the frame 3 via dampers 5.5.5.5.

Further, on the front side and side part of the frame 3, a loading mechanism 6 and a loading arm 8 are provided for transporting the disc 106 inserted into the disc insertion slot 2 to a predetermined position (approximately the center position of the support frame 4). A loading arm swinging mechanism 7 for swinging up and down is provided.

The loading mechanism 6 has a drive roller 9a attached to the support frame 4. The loading mechanism 6, loading arm rocker tlI7, and locking mechanism 45, which will be described later, are disclosed in the previously filed Utility Model Application No. 62
It is described in detail in No.-136632.

In addition, a loading motor 10 is mounted on the front side of the frame 3.
is provided, and when the drive roller 9a is rotated by the drive of the loading motor 1o, it cooperates with the driven roller 9b arranged opposite to this drive roller 9a to move the disk 106 inserted into the disk insertion slot 2 to the predetermined position. Transport to position.

Also, on the inner side of the frame 3 and near the disk insertion slot 2, there is a particularly small-diameter disk 106 as shown in FIG.
A centering machine tM 1 2 is provided for positioning the disk at the center of the disk insertion slot 2. As shown in FIG. 3, the centering mechanism 12 includes a pair of centering arms 1 that are spaced apart on the left and right in the vicinity of the disk insertion slot 2.
3 and 14, and a centering lever 15 located between the centering arms 13 and 14.

The pair of centering arms 13 and 14 are generally L-shaped in their entirety, and have tip portions 13a and 14 that serve as contact portions that come into contact with the inserted compact disc 106, respectively.
a and side end portions 13b, 14b, and this tip portion 13g
, 14a and side end portion 13b. 14b and the central portion 13c.
, 14c are pivotally supported on the frame 3 via support pins 16, 17 provided on them. The tip portions 13a, 14a extend to the disk insertion slot 2, and the tip portions 13a, 14a extend to the disk insertion slot 2.
Centering bins 18 and 19 are attached to the disc slot 2, and these centering bins 18 and 19 are respectively arranged at central positions P and P that divide the disk insertion slot 2 into approximately three equal parts. In addition, the centering bin 18.19 has a tip portion of 13g.
, 14a, and for this reason, the centering pins 18, 19 also have tip portions 13a, 14a as abutting portions.
It can be considered as tl on the side ends 13b, 14b
1 facing each other and each connecting pin 20.
21 is attached. Further, an engaging piece 131 is formed at the center portion 13c of one of the centering arms 13 on the distal end side in the disk insertion direction.

The centering lever 15 has a generally inverted W-shape as a whole, and connecting grooves 22.23 are formed at both ends of the centering lever 15. By fitting the connecting pins 20.21 into the connecting grooves 22.23, a pair of connecting grooves 22.23 are formed. The centering arms 13, 14 and the left and right ends of the centering lever 15 are connected. A long hole 25 is formed in the center portion 15c of the centering lever 15 along the disk insertion direction, and as shown in FIG. The head is 25a. A guide pin 26 implanted in the frame 3 is loosely inserted into the elongated hole 25, and the guide pin 26 is relatively movable within the elongated hole 25.

Further, the center portion 15c of the center link lever 15 extends toward the tip side in the disk insertion direction, and a guide groove 125 is provided at the tip. is engaged with the idle pin 126. In addition, this central portion 15c is located between a pair of guide protrusions 3c and 3d provided on the frame 3. Therefore, the centering lever 15 can reciprocate in the disk insertion direction.

A tension spring 27.28 is stretched between the pair of centering arms 13, 14 and the projections 3b, 3b of the frame 3, and the biasing force of this tension spring 27.28 causes the pair of centering bins 18.19 to be are brought closer to each other.

When the pair of centering bins 18 and 19 are brought close to each other, the distance between them is 8cII1 or less, and when the small diameter disk 106 is inserted from the disk insertion opening 2, this disk comes into contact with the centering bins 18 and 19.

Here, if a small-diameter disk is not inserted into the center of the disk insertion slot 2 but is inserted unevenly, this disk will come into contact with one of the pair of centering pins 18 and 19. When the disk 106 comes into contact with the centering pin 18 as shown in FIG. 3, the centering arm 13 rotates slightly counterclockwise about the support pin 16 against the biasing force of the tension spring 27. . By this rotation of the centering arm 13, the centering lever 1
5 rotates slightly clockwise as a whole.

When the centering lever 15 rotates clockwise in this way, the guide pin 26 is slightly deviated from the center of the circular head 25a of the elongated hole 25, as shown in FIG. come into contact with In this case, the guide bin 26 becomes unable to move relatively within the elongated hole 25.
That is, the centering lever 15 is aligned with the disk insertion slot 2.
Unable to move to the side. Therefore, although the centering arm 13 rotates a little by the disk 106, it does not rotate any further. Therefore, the disc 106 that has been accidentally inserted is regulated by the centering bin 18 and guided to the center of the disc insertion slot 2.

In this way, when the disk 106 is guided to the center of the disk insertion slot 2, the disk 106 simultaneously contacts the pair of centering bins 18 and 19. Then,
A pair of centering arms 13, 14 are attached to the support bin 16.
17, and at this time the guide pin 26
does not deviate from the widthwise center of the circular head 25a of the elongated hole 25.

Therefore, the guide bin 26 becomes relatively movable within the elongated hole 25, and the centering lever l5 moves toward the disk insertion slot 2 side. When the centering lever 15 is moved, the centering arm 13.14 can be rotated further and the disc 106 can be inserted into the vehicle CD player.

On the other hand, as shown in FIG. 2, a turntable 29 on which the disk 106 is placed is provided approximately at the center of the support frame 4, and this turntable 29 is operated by a spindle motor 30 provided on the lower surface side of the support frame 4. be rotated. A small disc-shaped clamper 31 is located above the turntable 29, and this clamper 31 is attached to a clamper arm 3 that is swingably attached to the rear of the support frame 4.
It is provided at the triangular tip of 2. Clamper arm 3
A tension spring 33 is stretched between the clamper arm 2 and the support frame 4, and the clamper arm 32 is connected to the turntable 2.
It is pushing towards 9.

In addition, as shown in FIG. i5 and FIG. The operation auxiliary plate 34 that operates the fixed detection pin 41 is located at pivot points 130a and 130 on both sides of the front end of the clamper arm 32.
b, and is swingably attached by a plate spring 140, and is biased downward by a leaf spring 140. On the lower surface side of the actuation auxiliary plate 34, in the center thereof, there is formed a generally arcuate disk recess 35 that fits a disk having a diameter of 8cII1. Therefore, when the small-diameter disk 106 is conveyed toward a predetermined position, the disk 106 is moved into the disk recess 35.
to go into. A hole 36 is formed at the rear end of the disc recess 35, and a central portion of a suppression auxiliary mechanism 37 provided on the upper surface side of the actuation auxiliary plate 34 faces the hole 36.
The tip of the disk 106 that has entered the disk recess 35 comes into contact with the pressing auxiliary device v437 through the hole 36, causing it to act.

Here, when the disk 101 with a diameter of 12 (!Il1) is conveyed onto the turntable 29, this disk 1
01 has a large diameter, so it does not enter the disk recess 35 of the actuation auxiliary plate 34, but is conveyed as it is, climbing over it, and its periphery directly contacts the detection pin 41 without causing the suppression auxiliary device Tie 3 7 to act. After that, it is placed on the turntable 29.

The suppression auxiliary mechanism 37 has a pair of swinging arms 38 and 39, and base end portions of the pair of swinging arms 38 and 39 are pivotally mounted on the operation auxiliary plate 34. A tension spring 40 is stretched between the pair of swinging arms 38, 39, and the tip portions 38a.
39a are fitted in a mutually gripping manner as shown in FIG. Therefore, the small diameter disk 106 is inserted through the hole 36.
When the tips 38a, 39a are pushed by the tips of the swing arms 38, 39, the pair of swing arms 38, 39 swing, respectively. A protruding piece 38b is integrally formed on the swinging arm 38, and a detection pin 41 is disposed at a position facing the protruding piece 38b, and as the swinging arm 38 swings, the protruding piece 38b suppresses the detection pin 41. do.

As shown in FIG. 8, the detection pin 41 is attached to one end of a first link 42 that is pivotally installed on the rear end side of the frame 3 via a pin 142, and the other end of the first link 42 is attached in the disk insertion direction. It is connected via a pin 51 to the rear end side of a second link 43 which is slidably disposed on the second link 42 and 43, and these two links 42 and 43 form a link mechanism. 2nd link 4
3 has elongated holes 52 and 53, and guide pins 54 and 55 fixed to the frame 3 engage with these elongated holes 52 and 53, respectively, to guide the second link 43 along the top plate 3a, This tJ2 link 43 has a tension spring 5
6 is biased toward the rear side of the frame 3. Further, a lock arm 57 is provided on the disk insertion slot 2 side of the second link 43 and extends toward the center of the frame 3. The tip of this lock arm 57 extends toward the centering arm 13, and this A lock pawl 58 as a lock portion that engages with the mating piece 131 is formed.

If the detection pin 41 is a small diameter disk 106, the swing arm 3
8, and in the case of the large-diameter disk 101, when it is directly suppressed by each disk, the second link 43 slides and locks the loading arm rocker $II7 (Fig. 1.2). Release it and allow it to descend. At this time, the lock claw 58 also moves toward the engagement piece 131 of the centering arm 13 along with the sliding of the second link 43, and when engaged with this engagement piece 131, the rotation of the centering arm 13 is locked. That is, the first link 42
As described above, the second link 43 releases the locked state of the horizontal loading arm rocker 7, and also connects the centering arm 13 through the lock pawl 58 etc.
The rotation of the centering arm 14 and the rotation of the centering arm 14 are locked via the centering lever 15. Therefore, the first link 42, the second link 43, the lock arm 57, the lock claw 5
8. The engagement piece 131 constitutes an arm lock mechanism 59 as a whole.

On the other hand, as shown in FIGS. 1 and 2, the support frame 4
A lock pin 44 is implanted at the side end of the frame 3 and protrudes to the side of the frame 3. A lock mechanism 45 is provided on the frame 3 from which the lock pin 44 protrudes, and the lock pin 44 is locked by the lock mechanism 45 until the inserted disk is transported to a predetermined position, and the support frame 4 is fixed to the frame 3. ing. Loading arm swing mechanism 7
When the loading arm 8 is moved downward by the operation of , the lock mechanism 45 releases the locked state of the lock pin 44, and the support frame 4 is supported by the frame 3 via the damper 5 in a cushioning manner.

Next, the effect will be explained.

Although the centering mechanism 12 of the present invention is effective when using both large-diameter and small-diameter disks 101 and 106, explanation will be given first by taking the small-diameter disk 106 as an example.

When a small-diameter disk 106 is inserted into the disk insertion slot 2, a sensor 47 provided at the front of the top plate 3a detects the insertion of the disk 106, and the loading motor 10 is driven (FIG. 1). Here, when the small-diameter disk 106 is inserted, if it is inserted not in the center of the disk insertion slot 2 but off-centered, it will come into contact with one of the pair of centering bins 18 and 19 of the centering mechanism 12. When the disk 106 comes into contact with either of the pair of centering pins 18 and 19, the centering mechanism 12 guides the disk 106 to the center of the disk insertion slot 2 as described above.

Next, the driving roller 9a is rotated by the driving of the loading motor 10, and the inserted disk 106 is conveyed toward the turntable 29 in cooperation with the driven roller 9b. At this time, centering arms 13, 14
The centering bins 18 and 19 take their initial positions due to the biasing forces of the tension springs 27 and 28, and are at the center position which divides the width of the disk insertion slot 2 into approximately three equal parts. When the disk 106 is conveyed to the vicinity of the center of the turntable 29, since the disk 106 has a diameter of 8 (7), it enters the disk recess 35 of the actuation auxiliary plate 34. When the disk 106 enters the disk recess 35, the tip of the disk 106 presses the detection pin 41 via the suppression assisting mechanism 37 facing into the hole 36, as shown in FIG. That is, as described above, the disk 106 moves the swinging arm 38, and the protruding piece 38b touches the detection pin 4.
Press l.

When the detection bottle 41 is pressed, the first link 42 of the link mechanism swings around the bottle 142 as shown in FIG. Activate.

As shown in FIG.
0, the pin 150 is released by sliding of the second link 43, and the loading arm oscillating machine 7 moves down together with the loading arm 8.

At this time, the clamper arm 32 is moved by the tension spring 33
The disc 106, which is lowered by the urging force of the disc 106 and placed on the turntable 29, is pressed and fixed by the clamper 31. That is, the loading arm rocker till
Reference numeral 7 also serves as a clamper arm operating mechanism for holding the clamper arm 32 in the upper position. In this way, the disc 106 is fixed by the clamper 31, and in conjunction with the operation of the loading arm mechanism 7, the locking mechanism 45
releases the locked state of the lock pin 44, and the support frame 4 is cushionedly supported by the frame 3 via the damper 5, and becomes a floating state. In this way, preparation for the reproduction operation is completed, and the spindle motor 30 is driven to rotate the disk 106 via the turntable 29. When the disc 106 is rotated, a reading head (not shown) emits laser light, and the reading head moves in the radial direction of the disc 106, thereby reproducing the music recorded on the disc 106.

Generally, when the disc 106 is fixed to the turntable 29 and rotated by the spindle motor 30 and the music recorded on the disc 106 is being played back, another disc is not inserted into the disc insertion slot 2. . but,
If you temporarily stop playing music and leave the disc 106 fixed on the turntable 29,
It is often the case that the user forgets to place and fix the disc 106 on the turntable 29.

Therefore, if another disk is inserted twice into the disk insertion slot 2 while the disk 106 is fixed to the turntable 29, both the disk and the CD player will be damaged.

Therefore, as shown in FIG. 8, a centering mechanism 12 is provided to prevent double insertion of the disk.

That is, the disc 10 inserted into the disc insertion slot 2
6 is positioned at the center by the centering mechanism 12 and then transported toward the turntable 29, but the centering arms 13, 14 of the centering mechanism 12 are rotated after the disk passes by the biasing force of the tension springs 27, 28. and return to the initial position.

Furthermore, the disc 106 is transported to the turntable 29.
When placed and fixed, the disk 106 presses the detection pin 41 as described above, and the second link 43 slides in the direction of the disk insertion slot 2. When the second link 43 is slid, the lock pawl 58 approaches and engages with the engagement piece 131 of the centering arm 13 via the lock arm 57. When the lock claw 58 engages with the engagement piece 131, the rotation of the centering arm 13 is locked, and the rotation of the centering arm 14 via the centering lever 15 is also locked at the same time.

Therefore, when the disc 106 is fixed to the turntable 29, even if you accidentally try to insert another disc into the disc insertion slot 2, the centering pins 18, 1
9 serves as a conventional double-insertion prevention member, and this centering pin 18, 19 prevents the insertion of another disc. In this way, the accidental double insertion of another disc is prevented, thereby preventing damage to both the disc and the CD player.

In addition, the centering mechanism 59 and the conventional first
Link 42# Since the second link 43 is used to also serve as the conventional double insertion prevention member and its drive mechanism, the conventional double insertion prevention member and its drive mechanism are unnecessary. Since the double insertion prevention member and its drive mechanism are thus unnecessary, the cost of the CD player as a whole can be reduced. In addition, a centering mechanism 12 and a first link 42. By providing the second link 43 with the above function in addition to the original function, the mechanism of this CD player is simple and simple, and operational reliability can be ensured.

In addition, the disc 10 fixed to the turntable 29
6 is ejected from the disk insertion slot 2, the disk 106 releases the detection bin 41, so the second link 43
slides in the disk insertion direction by the biasing force of the tension spring 56. When the second link 43 slides in the disk insertion direction, the locking claw 58 disengages from the engagement piece 131, and the centering arms 13, 14 become rotatable.

Therefore, the disk 106 is conveyed to the disk insertion slot 2 by the driving roller 9a and the driven roller 9b, and is ejected after spreading the centering bins 18 and 19 apart. Note that this series of operations is the same for the large-diameter disk 101 as well. Further, even if the movement of the centering lever 15 is locked by the lock pawl 58, the function of the lock mechanism can also be achieved.

〔Effect of the invention〕

As explained above, according to the present invention, the centering mechanism that positions the disc in the center of the disc insertion slot is provided, so even if the disc is inserted unevenly into the disc insertion slot, the disc will be regulated by the centering bin. Guided to the center of the insertion slot. Therefore, the disc is securely placed and fixed on the turntable, and music can be played back by the reading head.

Further, a pair of centering arms are rotatably supported in the disk insertion slot and have a contact portion that comes into contact with the inserted disk, and the centering arms are connected between the centering arms, and the pair of centering arms rotate substantially simultaneously. A centering mechanism is provided that includes a centering lever that moves reciprocally when the disk is moved, and a lock mechanism that locks the rotation of at least one member of the pair of centering arms and the centering lever is operated by detecting insertion of the disk into a predetermined position. Since it was arranged in conjunction with the link mechanism that
Even if you accidentally try to insert another disc into the disc insertion slot twice, the centering bin will prevent you from inserting another disc. In this way, the accidental double insertion of another disc is prevented, thereby preventing damage to both the disc and the disc playback device.

Therefore, since the conventional double insertion prevention member and its drive mechanism are not required, the cost of the entire disc playback device can be reduced. In addition, the centering mechanism and link mechanism that replace these have a function to prevent double insertion in addition to their original function, making this disc playback device simple and simple, ensuring operational reliability. Can be done.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a CD player according to the present invention, FIG. 2 is a perspective view of a support frame provided with a centering mechanism,
Fig. 3 is a plan view of the centering mechanism, Fig. 4 is an enlarged view of part A in Fig. 3, Fig. 5 is a perspective view of the actuation auxiliary plate and the pressing auxiliary mechanism, and Fig. 6 is the actuation auxiliary plate and the suppression auxiliary. A sectional view of the mechanism, Figure 7 is an enlarged view of part B in Figure 5, and Figure 8 is an enlarged view of part B in Figure 5.
Figure 9 is a plan view showing the centering mechanism and locking mechanism.
The figure is a perspective view of a conventional in-vehicle CD player. 2... Disc insertion slot, 12... Centering mechanism, 13.14... Centering arm, 15... Centering lever 18.19... Centering pin, 25... Long hole, 26... Guide bin, 29...
Turntable, 32... Clamper arm, 59...
- Lock mechanism, 106...disc (compact disc).

Claims (1)

[Claims] A disk is inserted into the disk insertion slot, and when the disk reaches a predetermined position in the player, the disk operates the clamper arm actuating mechanism to hold the clamper arm in the upper position via the link mechanism, and the clamper arm is activated. In a disc playback device in which a compact disc is fixed on a turntable by lowering an arm and the turntable is rotated to play back recorded information, the disc playback device is installed in the disc insertion slot and plays the disc to be inserted. It has a centering mechanism for guiding the disc to the center of the disc insertion slot, and the centering mechanisms are swingably provided at intervals in the disc insertion slot, and are arranged so as to face the disc insertion slot at intervals and to guide the disc to the center of the disc insertion slot. two centering arms each having abutting portions that abut on the two centering arms, and the peripheral edges of the disks that are respectively connected and inserted into these two centering arms simultaneously abut on the abutting portions of the two centering arms, opening them to each other. When an attempt is made to oscillate the disc in the direction, the oscillation movement is enabled, and when the periphery of the inserted disk contacts only the abutting portion of one centering arm, the oscillation of that centering arm is locked. a centering lever that operates to move, and a lock portion that locks movement of at least one member of the centering arm and the centering lever is formed in the link mechanism;
A disc playback device characterized in that the lock portion locks the centering mechanism in accordance with the operation of the link mechanism when the disc is inserted into a predetermined position of the player.