JPH07141745A - Disk player - Google Patents

Abstract

PURPOSE:To provide a compact disk player capable of performing by automatically centering three kinds of large, medium and small disks respectively by providing a disk centering mechanism for bringing a disk into contact from a diameter direction and guiding a disk to a specified central position. CONSTITUTION:A clamper plate 20 is provided with a pair of left and right guide arms 24a and 24b having guide pins 25a and 25b on one end. Centering arms 26a and 26b having centering pins 27a and 27b on one end and having locking arm 28a and 28b rotated with them as centers are provided. Also, an intermediate lever 30 is provided for linking so as to make both centering arms synchronized and rotated. On one end, a contact part 33b is provided, a detecting arm 33 rotatably supported is provided and by the rotation of a locking arm, the locked condition of the centering arm is released. The guiding arm is made rotatable only when the locked condition of the centering arm is released.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc player capable of playing various discs having different outer diameters, and more particularly to a disc player having a centering mechanism for guiding an inserted disc to a playing position.

[0002]

2. Description of the Related Art Conventionally, a vehicle-mounted disc player capable of playing two types of discs having diameters of 12 cm and 8 cm has been known. FIG. 1 is a schematic configuration diagram of such a disc player. As shown in the figure, a turntable 3 rotated by a spindle motor 2 is arranged in the housing 1, and a clamper 5 for clamping a disc carried on the turntable is vertically swingable. It is rotatably supported by the clamper plate 4.

When a disk A having a diameter of 12 cm or a disk B having a diameter of 8 cm is inserted from the insertion opening 1a,
While being conveyed toward the turntable side by the pair of conveying rollers 6, the centering mechanism provided on the clamper plate 4 automatically adjusts the position so that the center of the disk coincides with the center of the turntable. Here, a centering mechanism that determines the size of the inserted disc according to the diameter of the inserted disc and aligns the disc with the center of the turntable will be described.

FIG. 2 is a plan view of the clamper plate 4 arranged in the housing, the centering mechanism provided on the clamper plate 4, and the carrying roller 6. The clamper 5 is omitted for convenience of explanation. As shown in the figure, on the upper surface (outer surface) of the clamper plate 4, a pair of centering arms 7a and 7b are rotatable about shafts 9a and 9b projecting from the plate 4 and an intermediate lever. Both are arranged so as to interlock with each other via 8. The intermediate lever 8 is biased toward the rear of the device by a spring. Then, the pair of centering arms 7
The centering pins 10a, 1 are provided at one end of each of a, 7b.
0b is provided. Also, this centering pin 1
A pair of lock arms 11 centering on 0a and 10b
The a and 11b are arranged so as to be located on the lower surface (inner side surface) of the plate 4. Further, the pair of lock arms 11a and 11b is provided with a contact pin 1 on which a disk contacts.
2a and 12b and the lock portions 4a1 of the guide grooves 4a and 4b.
Lock pins 13a and 13b engageable with 4b1 are integrally formed. The pair of lock arms 11
Each of a and 11b is biased by a spring to rotate counterclockwise and clockwise.

On the lower surface of the clamper plate 4, there is arranged a detection arm 14 which is rotated by abutting the tip of the inserted disk, and is rotatably connected to a shaft 15 protruding from the centering arm 7b. Has been done. Therefore, when the centering arm 7b rotates counterclockwise, the center of rotation of the detection arm 14 (the shaft 15) becomes the arcuate groove 4a.
It is designed to move backward along d.

A slide member 16 extending in the front-rear direction is arranged on the right side surface of the clamper plate 4 so as to be capable of reciprocating in the front-rear direction. Locking member 17 arranged on the upper surface of No. 4
Has one end engaged. The lock member 17 is biased by a spring to rotate counterclockwise.

According to the centering mechanism having the above-mentioned structure, the center of the disk A or B having a diameter of 12 cm or 8 cm is inserted into the center of rotation (SC) of the spindle motor. It is designed to be positioned at. That is, when the disk A having a diameter of 12 cm is inserted and sent into the apparatus by the pair of conveying rollers 6, as shown in FIG. 3, first, the outer peripheral portion of the disk is brought into contact with the contact pins 12a, 12b of the lock arms 11a, 11b. And the lock arm 11a is rotated clockwise and the lock arm 11b is rotated counterclockwise. As a result, the engagement between the lock pins 13a, 13b and the lock portions 4a1, 4b1 is released, and the pair of centering arms 7a, 7b become rotatable.

When the disk A is further fed in this state, the centering arm 7a rotates clockwise and the centering arm 7b rotates counterclockwise as shown in FIG. At this time, both centering arms 7a, 7b
Is configured to rotate synchronously via the intermediate lever 8, so that only one of the centering arms does not rotate freely.
Is guided to the center of rotation of the spindle motor with the loading operation. When the disk A reaches the center of rotation of the spindle motor, one end of the detection arm 14 contacts the outer diameter end of the disk, the detection arm rotates slightly clockwise, and the other end mounts the slide member 16 on the device. The front side (FR) side, this operation becomes a trigger operation, and the slide member 16 is further moved forward by a drive mechanism (not shown).

At the same time, the lock member 17 whose one end is engaged with the slide member 16 is rotated clockwise,
The end portion 17a thereof engages with the protrusion 19b of the gear 19 to rotate the gear 19 slightly counterclockwise. At this time, the intermediate lever 8 engaged with the gear 19 by the rack slightly moves forward to rotate both centering arms to release the engagement between the centering pins 10a and 10b and the disc. In this state, the center of rotation of the detection lever 14 also moves rearward by the counterclockwise rotation of the centering arm 7b, and the engagement between one end of the detection lever and the disc is released.

The pair of upper and lower carrying rollers 6 are adapted to move in the vertical direction and separate from the disk in association with the operation of releasing the engagement between the disk and the centering pin. As described above, the centering of the disk A having a diameter of 12 cm is completed and the performance is performed.

On the other hand, when the disk B having a diameter of 8 cm is biasedly inserted to the right side, the outer diameter end of the disk B first engages with the contact pin 12b as shown in FIG.
1b is rotated counterclockwise to release the engagement between the lock pin 13b and the lock portion 4b1 of the guide groove 4b. Then, although a force to rotate the centering arm 7b counterclockwise acts, the other lock arm 11
While the locked state of “a” is not released and the centering arm 7b remains unrotatable, the disk B further contacts the centering pin 10b and is guided toward the center of rotation of the spindle motor. In this way
As shown in FIG. 6, when the centering of the disc B is completed, the disc B and the centering pin 10 as described above are completed.
The disengagement operation with a, 10b, etc. is performed, and then the performance is performed.

In the conventional disc player having the above-mentioned structure, one player can automatically perform centering of two types of discs having different outer diameters. However, in such a conventional disc player, only two types of discs can be dealt with, and in order to play, for example, three types of discs by one disc player, new centering is required according to today's diversification of discs. It is necessary to take a mechanism. On the other hand, it is necessary to simplify the structure, reduce the size of the device, and reduce the weight.

[0013]

SUMMARY OF THE INVENTION The object of the present invention is to automatically center each of three types of large, medium and small discs having different disc diameters for performance and to simplify the mechanism. Another object of the present invention is to provide a disc player that can achieve weight reduction, size reduction, and the like.

[0014]

DISCLOSURE OF THE INVENTION The disc player of the present invention has a large diameter, a medium diameter and a small diameter 3 which can be inserted through the insertion openings.
A disc player having a disc centering mechanism for guiding a disc of a kind to a predetermined central position by abutting the outer diameter portion of the disc in the carrying-in process from the radial direction,

The disk centering mechanism is rotatably supported on a predetermined substrate and has a pair of left and right first rotating arms each having a first contact portion for contacting the disk at one end thereof, and a pair of left and right first rotating arms. A connecting unit that connects the pair of left and right first rotating arms in a synchronized manner so that the first abutting portions located at one end of the first rotating arm are relatively close to and away from each other. And a pair of left and right second rotations that are rotatably supported in the same direction as the rotation direction of each of the pair of left and right first rotation arms and have a second contact portion that abuts against the disc at one end thereof. An arm,

The first moving means has a detection means for operating when the disc comes into contact with the disc, and a detection means for detecting that the disc has reached the predetermined central position, and a third contact portion for contacting the disc.
Rotatably supported by each of the one ends of the rotating arm,
The rotation of the first rotation arm is locked by the rotation in one direction, and the lock of the first rotation arm is unlocked by the rotation in the other direction by the contact of the disk with the third contact portion. And a pair of right and left locking means that can be moved, and the pair of left and right second rotating arms can rotate only when the locked state of the pair of left and right first rotating arms by the locking means is released. As much as possible, having an engaging portion that engages with each of the pair of left and right first rotating arms,

Each of the first contact portions is arranged so as to be able to simultaneously contact the outer diameter portion of any of the large-diameter, medium-diameter, and small-diameter disks, and the second contact portions each have a large diameter. Only the large diameter disc is arranged so as to be able to come into contact with the outer diameter portion at the same time, and the third abutting portions are brought into contact with the outer diameter portion at the same time only with respect to the large diameter and medium diameter discs. It is characterized in that it is rotatably arranged.

Further, in the disc player, the disc player operates in conjunction with the operation of the detecting means,
It is also characterized by having a releasing means for moving one of the second abutting portion and the third abutting portion that abuts on the disk located at the predetermined center position to release the abutting.

[0019]

When the large-diameter disc is inserted, first, the outer diameter portion of the disc comes into contact with the pair of left and right third abutting portions forming a part of the locking means, and the third abutting portions are rotated to release the locked state. Then
While the disk is in contact with the first contact portion, the pair of left and right first rotating arms rotate in the opening direction. At the same time, the pair of left and right second rotating arms similarly rotate in the opening direction by the contact of the disk with the second contact portion. Further, when the disc is fed, the detection means detects that the disc has reached a predetermined center position.

When a medium-diameter disc is inserted, the pair of left and right second abutting portions do not abut on the outer diameter portion at the same time. Will guide you towards the center. Then, even if the disc is further fed and comes into contact with one of the third abutting portions to release the locked state of the one first rotating arm by the one locking means, the other first rotating by the other locking means. Since the arm is held in the locked state, the pair of left and right first rotating arms cannot rotate, so that the disk is guided by these third contact portions and moves toward the center. After that, when the left and right third contact portions are brought into contact with each other and the left and right locked states are released, the pair of left and right first rotating arms rotate in the opening direction while the disc comes into contact with the first contact portion. To do. In this state, the disc is located at a substantially predetermined position in the left-right direction. Further, when the disc is fed, the detection means detects that the disc has reached the predetermined center position even in the front-rear direction.

When a small-diameter disc is inserted, the pair of left and right second abutting portions do not abut on the outer diameter portion at the same time. You will be guided towards the center. Then, even if the disc is further fed and comes into contact with one of the third abutting portions to release the locked state of the one first rotating arm by the one locking means, the other first rotating by the other locking means. Since the arm is held in the locked state, the pair of left and right first rotating arms cannot rotate, so that the disk is guided by these third contact portions and moves toward the center. Then, when it reaches a position where it comes into contact with the pair of left and right first contact portions at the same time, the disc reaches a substantially predetermined center position in the left-right direction. In this state, even if the disc engages with the third contact portion, it is impossible to rotate them to release both locked states.

Further, when the disc is fed, the detection means detects that the disc has reached the predetermined center position even in the front-rear direction.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a disc player of the present invention will be described below with reference to the drawings. FIG. 7 is a plan view of the clamper plate 20 according to this embodiment. As shown in the figure, a clamper hole 20K, which rotatably fits and supports a clamper (not shown) for clamping a disc, is provided in the front portion of the clamper plate 20 so as to have a shaft center (SC) of the spindle motor. ) Is formed mainly,
The shafts 21a, 21b, 22a, 22b, 2 are provided on the upper surface of the rear part.
3a and 23b are projected. In addition, a long hole 20e extending in the front-rear direction and a hook 20e1 for locking one end of the coil spring are formed in a rear portion of the elongated hole 20e in a substantially central portion,
An elongated hole 20g extending in the left-right direction is provided on the right rear portion, and a hook 20 for locking one end of a coil spring on the right portion thereof.
g1 is formed, and a substantially rectangular opening 20h and a hook 2 that locks one end of a coil spring is formed by notching a part of the plate and bending and projecting it downward (inward).
0i are formed.

Further, an arcuate groove 20f centering on the shaft 21b is formed near the rear center and rightward, and is symmetrical with respect to the straight line L on the front left and right sides, and the shafts 21a and 21b are centered respectively. A pair of first guide grooves 20 having a substantially arc shape
a, 20b and a pair of second guide grooves 20c, 20d are formed. Then, the pair of second guide grooves 20c, 2
At 0d, first lock pieces 20c1 and 20d1 and a second lock piece 20 which lock by making a lock pin described later abut.
c2 and 20d2 also make contact with a bent portion of a centering arm, which will be described later, and lock the third lock piece 20c.
3, 20d3 are formed respectively.

The centering mechanism, which is a feature of the present invention, is arranged on the clamper plate 20 having the above-described shape. FIG. 8 shows a top view (outside surface) to which such a centering mechanism is attached, and FIG. 9 shows a bottom view (inside surface, disk is carried into this inside surface). As shown in FIG. 8, on the upper surface (outer surface) of the clamper plate 20, a pair of guide arms 24a, serving as second rotating arms, centering on the shafts 21a, 21b, respectively.
24b and a pair of centering arms 26a and 26b as the first rotating arm are each rotatable and a straight line L
It is arranged so as to be symmetrical with respect to. And
One end of the pair of guide arms 24a and 24b is the plate 2
0 is bent so as to be positioned on the lower surface side (inner side), and the bent pins have guide pins 25a, 25 as second contact portions, respectively.
b is provided so as to protrude downward (inward), and this region can move in the first guide grooves 20a and 20b.

A pair of centering arms 26a,
Similarly, one end of 26b is also bent so as to be positioned on the lower surface side (inner side) of the plate 20, and centering pins 27a and 27b as first abutting portions project downward (inward) respectively at the bent end portions. Further, the pair of lock arms 2 forming a part of the locking means with the centering pin as an axis.
8a and 28b are rotatably connected within a predetermined range. In particular, as shown in FIG. 9, lock pins 39a and 39b forming part of the locking means are formed on the pair of lock arms 28a and 28b so as to project upward (outward), respectively. The torsion coil springs 40a and 40b are urged to rotate forward.

On the other hand, a pair of guide arms 24a, 24b
An arcuate groove 24 centered on the shafts 21a and 21b is provided at the other end of the
a1 and 24b1 are formed in the arc-shaped groove,
Lock shafts 29a, 2 fixed to the other ends of the pair of centering arms 26a, 26b by projecting upward
9b are respectively inserted. Further, the lock shafts 29a and 29b fixed to the other ends of the pair of centering arms 26a and 26b also protrude downward, and are formed in the intermediate lever 30 and are elongated holes 30f and 3f extending in the left-right direction.
0 g (see FIG. 10).

The intermediate lever 30 includes a pair of left and right guide arms 24a, 24b and centering arms 26a, 26.
It serves as a connecting means for rotating b in synchronization with each other, and two long holes 30d extending in the front-rear direction are formed in this, and the shafts 22a and 22b are formed in the long holes 30d.
Is inserted and is movable only in the front-back direction.

Further, on the right rear side of the intermediate lever 30, three rising pieces 30a, 30b, 30c with which a part of a second slider 36 described later is engaged are formed. The intermediate lever 30 has a hook 30e formed on a part thereof and a hook 2 formed on the clamper plate.
A coil spring 31 stretched between 0e1 and 0e1 constantly biases the coil spring 31 toward the rear.

Of the pair of left and right centering arms, the centering arm 26b located on the right side is provided with a shaft 32 which is disposed in the arcuate groove 20f and projects downward (inwardly). A detection arm 33 as a detection means having the shaft 32 as a rotation center is rotatably attached inside the clamper plate 20 (see FIG. 9). The detection arm 33 has a contact portion 33b with which one end of the detection arm 33 comes into contact with the vicinity of the innermost portion of the disk, and the other end of the detection arm 33 faces the outside of the plate 20 in an opening 20h formed in the clamper plate. The first that protrudes and is described later
An engagement pin 33a that engages with a part of the slider 34 is formed.

Further, the hook 33 formed at the other end
A coil spring 41 is stretched between C and a hook 20i formed on the clamper plate 20, and is biased to rotate counterclockwise in FIG. As shown in FIG. 8, the right side surface of the clamper plate 20 is
A first slider 34 having a substantially triangular engaging piece at the rear end and extending in the front-rear direction is disposed so as to be reciprocally movable in the front-rear direction. The first slider 34 is always biased rearward by the coil spring 35.

Further, on the upper right rear surface of the clamper plate 20, the rising piece 3 of the intermediate lever 30 is provided at the left end.
0a, 30b, 30c engaging piece 36a,
A second slider 36 having a V-shaped torsion coil spring 38 is arranged at the right end. Further, two long holes 36b extending in the left-right direction are formed in this, and the shafts 23a, 23b are fitted and inserted into the long holes 36b,
It can be moved only in the left-right direction.

The second slider 36 is always urged toward the right side by a coil spring 37 stretched between a hook 36c formed on a part of the second slider 36 and a hook 20g1 formed on a clamper plate. Has been done. The second slider 36 engages with the guide bins 25a, 25b, centering pins 27a, 27b, etc. engaged with the outer diameter portion of the disc before the centering of the inserted disc is completed and the performance is performed. It cancels the match state and makes it ready for performance.

The releasing operation is performed as follows. That is, when the detection arm 33 rotates clockwise in FIG. 8 and the engagement pin 33a located at one end of the detection arm 33 presses the rearward inclined portion 34a of the engagement piece of the first slider 34, the first slider 34 is moved. Move it slightly forward. This becomes a trigger operation, and the first slider 32 is further moved to the front side (FR) by a predetermined driving means (not shown). Then, the front side inclined portion 34b of the engaging piece engages with a part of the torsion coil spring 38 provided on the second slider 36, and the second slider 36 is moved toward the left side. The tip end portion of the taper shape of 36a is a rising piece 30a, 30b, 30c of the intermediate lever 30.
To lock the intermediate lever 30 while moving it a little further forward.

On the other hand, a pair of left and right guide arms 24a, 2
4b and the centering arms 26a and 26b are moved to the front by a slight distance from the intermediate lever 30. The guide arm 24a and the centering arm 26a are located on the left side.
8, the guide arm 24b and the centering arm 26b located on the right side rotate in the clockwise direction in FIG. 8, respectively, and separate from the outer diameter portion of the disk. This completes the release operation.

Next, the operation of the disc player having the above centering mechanism will be described with reference to FIGS. 10 to 23, like FIGS. 3 to 6, in order to clarify the shapes of the constituent members and the positional relationship thereof, the overlapping portions are also shown in perspective views shown by solid lines. . First, when the disc is not inserted, the positional relationship of the centering mechanism is as shown in FIG. That is, the lock pin 39 protruding from each of the pair of left and right lock arms 28a and 28b.
a, 39b are engaged with the respective first lock pieces 20c1, 20d1 of the pair of left and right second guide grooves 20c, 20d,
The rotation of each of the pair of centering arms 26a and 26b is restricted.

A pair of left and right guide arms 24a, 2a
4b is an arcuate groove 24a1 formed at one end of each.
Centering arms 26a and 26b are provided on one side of 24b1.
The lock shafts 29a and 29b protruding from each of them are in contact with each other (however, there is a slight margin in the structure),
The clockwise rotation of the left guide arm 24a and the counterclockwise rotation of the right guide arm 24b are restricted.

Further, the first slider 34 is located at the rearmost portion of the movable range, so that the front side inclined portion 34b and the torsion coil spring 38 do not engage with each other, and
The slider 36 is located on the rightmost side of the movable range and is not engaged with the intermediate lever 30. In this situation,
For example, a case where a disc C having an outer diameter of 20 cm is inserted for playing will be described below with reference to FIGS. 11 to 14.

As shown in FIG. 11, the disk C is inserted inside while being sandwiched by a pair of upper and lower carrying rollers 6.
First comes into contact with the front ends (third abutment portions) of the pair of left and right lock arms 28a, 28b, and the centering pins 27a, 2b.
Each lock arm is rotated rearward around 7b. By this operation, the lock pins 39a, 39
The engagement between b and the first lock pieces 20c1 and 20d1 is released, and the pair of left and right centering arms 26a and 26b are rotatable.

When the disk C is further fed, an abutting force acts such that it abuts the guide pins 25a, 25b and pushes open the pair of left and right guide arms 24a, 24b.
At this time, since the centering arms 26a and 26b are rotatable, the centering arm 26
Guide arms 24a and 24b accompanying rotation of a and 26b
Also rotates. The progress of the process is shown in FIG. In the state shown in FIG. 12, the disk C has left and right guide pins 25a and 25b, lock arms 28a and 28b, and centering pins 27a. It is in a state of being in contact with 27b. In the abutting and conveying process, the center of the disk C has already been guided so as to be substantially located on the straight line L passing through the center (SC) of the spindle motor. Further, in this carrying process, as the centering arm 26b located on the right side rotates counterclockwise, the shaft 32 also moves rearward along the arcuate groove 20f. Therefore, the detection arm 33 rotatably connected to the shaft 32 also rotates so that the contact portion 33b moves rearward. As a result, the contact portion 3 between the back end of the loaded disk and the detection arm
The non-contact state with 3b is maintained.

Further, when the disk is loaded and reaches the vicinity of the center (SC) of the spindle motor, the contact portion 33b of the detection arm 33 contacts the outer diameter end of the disk as shown in FIG. The detection arm 33 pivots around the shaft 32 slightly clockwise. At this time, the engagement pin 33a located at the other end of the detection arm presses the rearwardly inclined portion 34a of the first slider 34, and the first slider 34 moves slightly forward (FR). This operation becomes a trigger operation, and thereafter, the first slider 34 is further moved forward by a predetermined driving means (not shown). Then, as shown in FIG. 14, when the front side inclined portion 34b of the first slider 34 moves while engaging with the right side inclined portion of the torsion coil spring 38 of the second slider 36, this time the second
The slider 36 moves toward the left side (L).

Thereafter, at the same time that the end taper portion of the engaging piece 36a formed at the left end portion of the second slider 36 engages with the rear end portion of the rising piece 30c of the intermediate lever 30. In association with the operation of the first slider 34, the rotation of the pair of upper and lower disc-conveying rollers 6 is stopped, and both rollers are separated in the vertical direction (the lower roller moves downward), and the disc feeding operation is performed. Is released. After that, when the second slider 36 further moves to the left (L), the flat portion of the engaging piece 36a engages with the rising piece 30c, but the intermediate lever 30 is moved by the engaging movement of the tapered portion in the meantime. It moves forward (FR) according to the amount of movement.

Due to the forward movement of the intermediate lever 30, the pair of left and right centering arms 26a and 26b are pivoted in the opening direction (the left centering arm 26a is clockwise and the right centering arm 26b is counterclockwise) and bent. The parts contact the third lock pieces 20c3 and 20d3, respectively, while the lock shafts 29a and 29b fixed to both centering arms also rotate the pair of left and right guide arms 24a and 24b in the opening direction to engage with the disc. The centering pins 27a and 27b and the guide pins 25a and 25b that have been used are separated from the outer diameter portion of the disk and the engaged state is released. On the other hand, the detection arm 36 also has its engaging pin 33.
When a is engaged with the side surface of the opening 20h of the clamper plate, the center of rotation (the shaft 32) moves rearward (the centering arm 26a rotates counterclockwise so that it moves rearward), so that the contact is achieved. The portion 33b is separated from the outer diameter end portion of the disc, and the engaged state is similarly released.

By the above operation, the centering of the disk is completed and the holding state by the centering mechanism is released. At the same time as this releasing operation,
While the clamper plate 20 swings slightly downward around the S axis, the roller (following roller) of the disk carrying roller 6 located below the disk moves downward to move the clamper and the turntable. The disk clamping operation is performed by the.

When all the above operations are completed, the spindle is rotated and the disk performance is started.
On the other hand, when carrying out the disc after the performance is completed, the first slider 34 is moved backward by the predetermined command signal, and the front side inclined portion 34b and the torsion coil spring 38 of the second slider 36 are engaged with each other. The second slider 3 is released.
6 moves toward the right side (R). As a result, the engagement between the engagement piece 36a and the rising piece 30c is released, and the intermediate lever 30 can be moved rearward by the urging force of the spring 31, and the pair of left and right guide pins 25a and 25b are released.
The centering pins 27a and 27b contact the outer diameter portion of the disc. At the same time as this contact operation, the lower roller of the disk carrying rollers 6 moves upward and the clamper plate 20 also swings upward, so that the disks are a pair of upper and lower disks. It is in a state of being sandwiched by the transport rollers 6.

Thereafter, by the rotation of the roller 6, the disc is carried forward and the pair of left and right guide arms 24a and 24b and the centering arm 2 are moved.
6a and 26b rotate in the closing (approaching) directions,
As shown in FIG. 10, the state before the performance is restored. Next, outer diameter 12
When the disk A of cm is inserted to play,
This will be described below with reference to FIGS.

As shown in FIG. 15, the disc A inserted in the substantially central portion of the insertion slot has a pair of upper and lower carrying rollers 6.
It is sent inward while being sandwiched between the first and second lock arms 28a and 28b, and the lock arms 28a and 28b are brought into contact with the front ends of the lock arms 28a and 28b. By this operation, the lock pins 39a and 39b and the first lock pieces 20c1 and 20d1 are disengaged from each other, and the pair of left and right centering arms 26 are released.
The a and 26b can rotate (the left centering arm 26a rotates clockwise and the right centering arm 26b rotates counterclockwise). When the disc A is slightly biased to the right side (R), the disc A first comes into contact only with the front end of the right lock arm 28b and is rotated counterclockwise to lock the lock pin 39b and the first lock. Piece 20d
However, since the left centering arm 26a is restricted from rotating (the pair of left and right centering arms 26a and 26b operate synchronously via the intermediate lever 30). And the lock pin 39a of the left lock arm 28a and the first lock piece 20c.
Since the engagement with 1 is not released, the left centering arm 26a cannot rotate, the right centering arm 26b cannot rotate, and the disk A is guided to the center by its centering pin 27b. Then, as described above, when the disk A also abuts on the left side lock arm 28a and the engagement between the lock pin 39a and the first lock piece 20c1 is released, both centering arms 26 are not released.
It is possible to rotate a and 26b.

Further, when the disk A is fed and reaches the vicinity of the center (SC) of the spindle motor, as shown in FIG. 16, the engagement with the lock arms 28a and 28b is released, and the left lock arm 28a is released. Is rotated counterclockwise, while the right lock arm 28b is rotated clockwise by the urging forces of the springs 40a and 40b, and the lock pins 39a and 39b are respectively rotated to the second lock pieces 20c2 and 2c.
The recessed position in front of 0d2 is reached. In the carrying process, the shaft 32 also moves rearward along the arcuate groove 20f, and the non-contact state between the disk A and the contact portion 33b of the detection arm 33 is maintained.

Then, as shown in FIG. 16, when the disk A reaches near the center (SC) of the spindle motor,
The end portion of the disk A comes into contact with the contact portion 33b of the detection arm, and the detection arm 33 rotates slightly about the shaft 32 in the clockwise direction. At this time, the engagement pin 33a located at the other end of the detection arm is attached to the rear side inclined portion 34 of the first slider 34.
By pressing a, the first slider 34 moves slightly forward (FR). This operation becomes a trigger operation, and thereafter, the first slider 34 is further moved forward (FR) by a predetermined driving means (not shown). Then, as shown in FIG. 17, when the front side inclined portion 34b of the first slider 34 moves while engaging with the right side inclined portion of the torsion coil spring 38 of the second slider 36, this time, the second slider 36 this time.
Moves to the left (L). Thereafter, at the same time that the end taper portion of the engagement piece 36a formed at the left end portion of the second slider 36 engages with the rear end portion of the rising piece 30b of the intermediate lever 30, The rotation of the pair of upper and lower disc conveying rollers 6 is stopped in conjunction with the operation of the 1-slider 34, and the lower roller (driven roller) moves downward to separate from the disc, and the feeding operation is released.

Thereafter, when the second slider 36 further moves to the left (L), the flat portion of the engaging piece 36a engages with the rising piece 30b, and the intermediate lever 30 moves forward (F
R), and a pair of left and right centering arms 26
a and 26b rotate in the opening direction, and the lock pins 39a and 3b
It stops when 9b engages with each of the second lock pieces 20c2 and 20d2. At this time, the centering pins 27a and 27b engaged with the disc A are released from the disc outer diameter portion and the engaged state is released. On the other hand, the detection arm 33
Similarly to the case of the disc having a diameter of 20 cm, the abutting portion 33b moves rearward to separate from the disc outer diameter portion, and the engagement between the two is released. In this case, although the guide arms 24a and 24b do not participate in the centering operation,
The lock shafts 29a, 29b have arcuate grooves 29a, 29
Since it is located substantially in the center of b, the guide arms 24a,
24b can be rotated. Therefore, by providing an appropriate biasing means and biasing the bent portions of both guide arms 24a, 24b so as to contact the inner end portions 20a1, 20b1 of the first guide grooves 20a, 20b, respectively, these guide arms It can prevent rattling.

By the above operation, the centering of the 12 cm diameter disk A is completed, and the holding state by the centering mechanism is released. The clamper plate 20
Since the disk clamping operation and the disk unloading operation due to the rocking of the disk are the same as those in the case of the disk C having the diameter of 20 cm, the description thereof will be omitted.

Next, the centering operation when the disk A having a diameter of 12 cm is biasedly inserted to the right of the insertion slot will be described with reference to FIGS. 18 and 19. As shown in FIG. 18, the disc A, which is biasedly inserted to the right of the insertion opening, firstly receives the guide pin 25 of the right guide arm 24b.
abut b. At this time, since the lock shaft 29b is in contact with the rear end of the arcuate groove 24b1 formed at the other end of the guide arm 24b, the guide arm 24b cannot rotate counterclockwise, and , The disk A is guided toward the center by the guide pin 25b.
When it is further fed while being guided by the guide pin 25b, this time it comes into contact with the front end of the right lock arm 28b and rotates it counterclockwise to lock pin 39b.
The engagement between b and the first lock piece 20d1 is released.

Further, when fed, the lock arm 2
The centering pin 27b is also brought into contact with the centering pin 27b in a state of being engaged with 8b, and an abutting force acts to rotate the right centering arm 26b counterclockwise. However, since the right centering arm 26b is configured to rotate in synchronization with the left centering arm 26a via the intermediate lever 30, the right centering arm 26b does not rotate unless the left lock arm is unlocked. I can't move. Therefore, the disk A is also guided by the centering pin 27b in the locked state and moves toward the center.

Then, the disk A is further fed,
When the lock arm 28a on the left side is engaged, the lock arm 28a is rotated clockwise to lock the lock pin 39a and the first lock piece 20.
The engagement with c1 is released. As a result, both centering arms 26a and 26b can be rotated, and the disk A is fed toward the center (SC) of the spindle motor as shown in FIG. 19 while rotating both centering arms.

The subsequent operation is the same as when the disc A is inserted near the center of the insertion slot, and a description thereof will be omitted. Next, the centering operation when the disk B having a diameter of 8 cm is biasedly inserted to the right side of the insertion port will be described with reference to FIGS. As shown in FIG. 20, the disc B that is biasedly inserted to the right of the insertion port first comes into contact with the guide pin 25b of the right guide arm 24b. At this time, the lock shaft 29 is provided at the rear end of the arcuate groove 24b1 formed at the other end of the guide arm 24b.
Since b is in contact with the guide arm 24b, the guide arm 24b cannot rotate counterclockwise, so that the disc B is guided toward the center by the guide pin 25b. When further fed while being guided by the guide pin 25b,
As shown in FIG. 21, this time the right lock arm 2
8b abutting on the front end and rotating it counterclockwise,
The engagement between the lock pin 39b and the first lock piece 20d1 is released.

Further, when fed, the lock arm 2
The centering pin 27b is also brought into contact with the centering pin 27b in a state of being engaged with 8b, and an abutting force acts to rotate the right centering arm 26b counterclockwise. However, as described above, the centering arm 26b on the right side is the intermediate lever 3
Since it rotates in synchronization with the left centering arm 26a via 0, the right centering arm 26b cannot rotate unless the locked state of the left lock arm is released. Therefore, the disk B is also guided by the centering pin 27b in the locked state and moves toward the center.

Then, when the disk B is further fed, it comes into contact with the left centering pin 27a, as shown in FIG. At this time, the disk B reaches near the center (SC) of the spindle motor, the engagement with the front end of the right side lock arm 28b is released, and the lock arm 28b rotates clockwise by the urging force of the coil spring 40b. However, the lock pin 39b is the first lock piece 2
Reach the front position of 0d2.

Further, at the same time when the disk B reaches the center (SC) of the spindle motor, the innermost end of the disk B contacts the contact portion 33b of the detection arm 33, and the detection arm 33
Rotates slightly clockwise about the shaft 32. At this time, the engagement pin 33a located at the other end of the detection arm presses the rearwardly inclined portion 34a of the first slider 34, and the first slider 34 moves slightly forward (FR). This operation is a trigger operation, and thereafter, the first slider 34 is further moved forward (FR) by a predetermined driving means (not shown). Then, as shown in FIG. 23, when the front side inclined portion 34 b of the first slider 34 moves while engaging with the right side inclined portion of the torsion coil spring 38 of the second slider 36, this time the second slider 36 is moved to the left side ( Move toward L). After that, at the same time when the end taper portion of the engaging piece 36a formed at the left end portion of the second slider 36 engages with the rising piece 30a of the intermediate lever 30, the first slider 34a. The rotation of the pair of upper and lower disc transporting rollers 6 is stopped in conjunction with the above operation, and the lower roller (driven roller) moves downward to separate from the disc, and the feeding operation is released.

Thereafter, when the second slider 36 further moves to the left (L), the flat portion of the engaging piece 36a engages with the rising piece 30a, while the intermediate lever 30 moves forward (F).
R), and a pair of left and right centering arms 26
a and 26b rotate in the opening direction, and the lock pins 39a and 3b
It stops when 9b engages with each of the first lock pieces 20c1 and 20d1. At this time, the centering pins 27a and 27b engaged with the disc B are separated from the disc outer diameter portion and the engaged state is released.

On the other hand, the detection arm 33 also has a diameter of 20 cm as described above and 1
Similar to the case of the disc having a diameter of 2 cm, the abutting portion 33b moves rearward to separate from the disc outer diameter portion, and the engagement between the both is released. By the above operation, the centering of the 8 cm diameter disc B is completed, and the holding state by the centering mechanism is released. Since the disk clamping operation by swinging the clamper plate 20 and the disk unloading operation after the performance is the same as those of the disks having the diameters of 20 cm and 12 cm, the description thereof will be omitted.

[0061]

As described above, according to the disc player provided with the disc centering mechanism of the present invention, whether a disc having a large diameter, a medium diameter or a small diameter is inserted,
Even if it is inserted to one side of the insertion slot, it will be guided to the predetermined center position for playing reliably during the carry-in process, and its positioning (centering) will be performed automatically, so that a smooth performance is possible. You can do it.

Further, since the centering is performed by a pair of right and left rotating arms, the structure is not particularly complicated as compared with the conventional mechanism, and as a result, the structure can be simplified and downsized.

[Brief description of drawings]

FIG. 1 is an external perspective configuration diagram showing a conventional disc player.

FIG. 2 is a plan view showing a centering mechanism provided in a conventional disc player.

FIG. 3 is a plan perspective view showing a process of centering a disk having a diameter of 12 cm by a conventional centering mechanism.

FIG. 4 is a plan perspective view showing a state where a disk having a diameter of 12 cm is centered by a conventional centering mechanism.

FIG. 5 is a plan perspective view showing a process of centering a disk having a diameter of 8 cm by a conventional centering mechanism.

FIG. 6 is a plan perspective view showing a state where a disk having a diameter of 8 cm is centered by a conventional centering mechanism.

FIG. 7 is a plan view of a clamper plate that supports a centering mechanism provided in the disc player of the present invention.

FIG. 8 is an outer plan view of the centering mechanism according to the present invention.

FIG. 9 is a plan view of the inside of the centering mechanism according to the present invention.

FIG. 10 is a plan perspective view of the centering mechanism according to the present invention as seen from the outside.

FIG. 11 shows a centering mechanism according to the present invention,
FIG. 7 is a plan perspective view showing a process of centering a 0 cm diameter disc.

FIG. 12 shows the centering mechanism according to the present invention
FIG. 7 is a plan perspective view showing a process of centering a 0 cm diameter disc.

FIG. 13 shows a centering mechanism according to the present invention
It is a plane perspective view showing a state in which a 0 cm diameter disc is centered.

FIG. 14 is a plan perspective view showing a state where the holding of the 20 cm diameter disk centered by the centering mechanism according to the present invention is released.

FIG. 15 shows a centering mechanism according to the present invention,
It is a plane perspective view showing a process of centering a 2 cm diameter disc.

FIG. 16 shows a centering mechanism according to the present invention,
It is a plane perspective view showing a state in which a disc having a diameter of 2 cm is centered.

FIG. 17 is a plan perspective view showing a state where the holding of the 12 cm diameter disc centered by the centering mechanism according to the present invention is released.

FIG. 18 is a plan perspective view showing a process of centering a 12 cm-diameter disk that is biasedly inserted by the centering mechanism according to the present invention.

FIG. 19 is a plan perspective view showing a state where a 12 cm diameter disc that is biasedly inserted is centered by the centering mechanism according to the present invention.

FIG. 20 is a plan perspective view showing a process of centering an 8 cm-diameter disc that is biasedly inserted by the centering mechanism according to the present invention.

FIG. 21 is a plan perspective view showing a process of centering an 8 cm-diameter disc that is biasedly inserted by the centering mechanism according to the present invention.

FIG. 22 is a plan perspective view showing a state in which a disc having a diameter of 8 cm and inserted eccentrically is centered by the centering mechanism according to the present invention.

FIG. 23 is a plan perspective view showing a state where the holding of an 8 cm diameter disk centered by the centering mechanism according to the present invention has been released.

[Explanation of symbols for main parts]

1 Disc Player Case 2 Spindle Motor 3 Turntable 5 Clamper 6 Disc Transport Roller 20 Clamper Plate 20a, 20b First Guide Groove 20c, 20d Second Guide Groove 20c1, 20d1 First Lock Piece 20c2, 20d2 Second Lock Piece 20c3 , 20d3 Third lock piece 21a, 21d Shaft 24a, 24b Guide arm (second rotating arm) 24a1, 24d1 Arc groove 25a, 25b Guide pin 26a, 26b Centering arm (first rotating arm) 27a, 27b Centering pin 28a, 28b Lock arm 29a, 29b Lock shaft 30 Intermediate lever 30a Start-up piece (for 8 cm diameter disc) 30b Start-up piece (for 12 cm diameter disc) 30c Start-up piece (for 20 cm diameter disc) 32 Shaft 33 Detection arm 33a Engagement pin 33b Abutment part 34 First slider 34a Rear inclined part 34b Front inclined part 36 Second slider 36a Engaging piece 38 Torsional coil spring 39a, 39b Lock pin 40a, 40b Torsional coil spring

Claims (2)

[Claims] 1. A disk centering mechanism for guiding three kinds of large-diameter, medium-diameter, and small-diameter disks that can be inserted from an insertion opening to an outer diameter portion of the disk in a radial direction in a loading process to guide the disk to a predetermined center position. A disc player having: the disc centering mechanism, wherein the disc centering mechanism is rotatably supported by a predetermined substrate, and a pair of left and right first pivot arms having a first abutting portion for abutting a disc at one end thereof, In order to rotate the pair of left and right first rotating arms in synchronization with each other so that the first abutting portions located at one end of the pair of left and right first rotating arms relatively approach and separate from each other. A pair of left and right pair of connecting means for connecting and a second contact portion that is rotatably supported in the same direction as the rotation direction of each of the pair of left and right first rotating arms, and has a second contact portion that contacts the disk at one end portion Second rotation And a detection unit that is operated by abutting of the disc to detect that the disc has reached the predetermined center position, and a third abutting portion that abuts the disc. Rotatably supported at each one end, and locks the rotation of the first rotation arm by rotation in one direction,
A pair of left and right locking means for unlocking the lock of the first pivot arm by pivoting in the other direction by abutting the disc on the third abutting part, The movable arm includes the pair of left and right first arms.
The first contact portion has an engaging portion that engages with each of the pair of left and right first rotating arms so that the rotating arm can be rotated only when the locked state by the locking means is released. Each of them is arranged so as to be able to simultaneously contact the outer diameter portion of any of the large-diameter, medium-diameter, and small-diameter discs, and each of the second abutting portions is provided only on the large-diameter disc. The third contact portions are arranged so as to be capable of contacting the diameter portion at the same time, and the third contact portions are arranged so as to be capable of simultaneously contacting the outer diameter portion of only the large-diameter and medium-diameter discs and rotating. A disc player characterized in that 2. It operates in conjunction with the operation of the detection means,
Of the first abutting portion, the second abutting portion, and the third abutting portion, there is a releasing means for moving one that abuts the disk located at the predetermined center position to release the abutting. The disc player according to claim 1, wherein: