JPH087433A - Optical disk player loading mechanism - Google Patents

Abstract

PURPOSE:To perform accurate centering even of an 8cm CD by carrying an optical disk held between a guide plate and a roller and bringing the optical disk into contact with a turntable by means of a chucking plate when the tip of the optical disk is abutted with the contact part of a slide plate. CONSTITUTION:An 8cm optical disk 30 inserted from an insertion port into an optical disk passage is held between a guide plate 15 and roller 16, carried in the direction of an arrow A by means of the rotation of the roller 16 and the tip of the optical disk 30 is abutted against a contact part 17c. Then, a chassis 13 is rotated around a horizontal shaft 13a, a free end chucking plate 14 is lowered, the disk 30 is pushed down and thus with a holding point between the plate 15 and the roller 16 as a fulcrum the disk 30 is lowered in the direction of an arrow P, the tip thereof is abutted against a stopper 24 and the disk is stopped. Further, the chassis 13 is rotated around the shaft 13a, a plate 14 is lowered and lowering of the plate 15 and the roller 16 is started. Thus, the disk 30 is rocked in the direction of an arrow Q with a mounting point to the stopper 24 as a fulcrum. When the center point of the disk 30 is brought into contact with a turntable 12, the contact part 17a is raised and the disk 30 is fixed on a table 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk player for reproducing an optical disk such as a CD (compact disk), and particularly to a 12 cm optical disk and an 8 cm optical disk.
The present invention relates to a loading mechanism of a type that discriminates both optical disks and automatically sucks them into a predetermined position on a turntable.

[0002]

2. Description of the Related Art Conventionally, as an on-vehicle optical disk player, by inserting either of a 12 cm CD and an 8 cm CD from an optical disk insertion port provided on the outer surface of a case, the optical disk is automatically sucked into a predetermined position. An optical disk player provided with a loading mechanism is known.

In such an optical disc player, the loading mechanism moves the optical disc inserted in the insertion slot to a predetermined position on the turntable,
The chucking plate holds the optical disk fixedly on the turntable.

Then, by rotating the turntable, the recording surface of the rotating optical disk is
Light such as laser light is emitted from the optical pickup. Then, the light receiving element of the optical pickup detects the return light from the surface of the optical disk and reads the signal recorded on the optical disk, so that a reproduction signal (hereinafter referred to as an RF signal) is generated. Has become.

Here, the loading mechanism is constructed, for example, as shown in FIG. That is, in FIG. 9, the loading mechanism 1 includes a guide plate 2 disposed above the optical disc passage inside the optical disc insertion opening (not shown) provided on the outer surface of the case of the optical disc player.
And a roller 3 disposed below the optical disk passage so as to face the guide plate 2.

The guide plate 2 is fixedly arranged, and its lower surface is a flat central portion 2a laterally with respect to the optical disc moving direction in the optical disc passage, and inclined portions extending diagonally downward on both sides of the central portion 2a. 2b,
2b is formed in a so-called hourglass shape.

Further, the roller 3 is rotatably supported around a rotation shaft extending laterally with respect to the optical disc moving direction in the optical disc passage, and in the axial direction, a central portion 3a having a relatively small diameter and the central portion 3a. It is formed in a so-called hourglass shape having tapered portions 3b, 3b whose diameters gradually increase toward the outside on both sides of the portion.

Further, the rotation axis of the roller 3 is
The rotation shaft is driven to rotate by a drive mechanism (not shown), and the outer peripheral surface of the rotation shaft is pressed against the lower surface of the guide plate 2 by being urged upward.

As a result, the optical disc 4 inserted into the optical disc passage from the optical disc insertion opening of the optical disc player enters between the guide plate 2 and the roller 3 and is sandwiched between the guide plate 2 and the roller 3. . here,
The roller 3 is rotationally driven around a rotation axis by a drive mechanism (not shown). Therefore, the optical disc 4 held between the guide plate 2 and the roller 3 is
On the basis of the rotation of the optical disc player, it is conveyed inside the optical disc player and moved to a predetermined position on a turntable (not shown).

At this time, since the guide plate 2 and the roller 3 are each formed in a drum shape, the optical disk 4 conveyed by the rotation of the roller 3 has the guide plate 2
Also, due to the shape of the roller 3, a force toward the inside, that is, the center, is received in the direction perpendicular to the transport direction. Therefore, even if the center of the optical disc 4 is deviated from the centers of the guide plate 2 and the roller 3 at the time of insertion, the optical disc 4 is moved to the center based on the shapes of the guide plate 2 and the roller 3 when being conveyed by the roller 3. Positioning, i.e. centering, can be performed. As a result, the optical disc 4 is
The center is moved to the center on the turntable. After that, the optical disk 4 is fixedly held at a predetermined position on the turntable by the chucking plate.

Thus, by rotating the turntable, the surface of the rotating optical disk 4 is irradiated with light such as laser light from the optical pickup. Then, the light receiving element of the optical pickup detects the return light from the recording surface of the optical disc and reads the signal recorded on the optical disc 4,
An RF signal is generated.

[0012]

However, in the loading mechanism 1 of the optical disc player having such a configuration, the centering of the inserted optical disc 4 is performed with respect to the optical disc 4 by the shapes of the guide plate 2 and the roller 3. It can be carried out by a force acting inward, ie in the center, with respect to the direction perpendicular to the transport direction. For this reason, the above force is caused by the lateral displacement of the guide plate 2 and the roller 3, the imbalance of the load for urging the rotation shaft of the roller 3 upward, the displacement of the mounting height of the guide plate 2 and the roller 3, and the guide. The balance between the left and right ends up being lost due to the drum-shaped dimensional error of the plate 2 and the roller 3. Further, the position of the turntable itself also has some play in the optical disk insertion standby position in order to secure a floating space in the reproducing state.

Thus, in some cases, the center of the optical disk 4 carried on the turntable by the loading mechanism 1 cannot completely coincide with the center of the turntable. In particular, in the case of a so-called 8 cm optical disc, since a left / right deviation is likely to occur at the time of insertion with respect to the insertion opening, a deviation with respect to a predetermined position on the turntable is likely to be large, and thus a chucking error is likely to occur. There was a problem.

Therefore, there is a method of preventing the displacement of the optical disc 4 by providing a position regulating pin in the optical disc passage. In this case, especially in the case of an 8 cm optical disc, the optical disc 4 contacts the position regulating pin. Without touching
Sometimes it slipped in and sometimes it was impossible to perform centering correctly.

In view of the above points, an object of the present invention is to provide a loading mechanism for an optical disk player, which enables accurate centering even when an 8 cm optical disk is inserted.

[0016]

According to the present invention, the above object is to provide a turntable on which an optical disk is mounted and which is rotationally driven, and to be swingable around a horizontal axis on one side of the turntable. A chassis supported and extending on the turntable, a chucking plate attached so as to face the turntable at the free end of the chassis, and an optical disk to be inserted on the other side of the turntable. In a loading mechanism of an optical disc player, which includes guide plates and rollers arranged so as to face each other so as to be nipped and conveyed, the loading mechanism is slidably attached to the chassis in the optical disc insertion direction. A slide plate, an abutting portion that protrudes downward near the front end of the slide plate in the optical disc insertion direction, and a downward direction from the chassis The optical disc player of the loading mechanism comprising a shaft and the distal end side is provided so as to protrude is formed so as to gradually narrow, is achieved.

The slide plate is provided with locking means, which normally locks the slide plate at a position for positioning the 8 cm optical disk in the insertion direction, and both shafts are pushed by the outer circumference of the optical disk. The locking means may be configured to release the locking of the slide plate when the lock is applied.

The locking means is a rotatably supported rotatably and symmetrically with respect to the chassis, and an engaging member implanted in the rotator so as to engage with a slot provided in the chassis. It is provided with a dowel pin, and the shaft may be embedded in the rotary plate.

Preferably, a stopper may be provided for restricting the lowering of the tip of the optical disc when the chucking plate is lowered.

Further, according to the present invention, the above object is to provide a turntable on which an optical disk is mounted and which is rotationally driven, and which is supported on one side of the turntable so as to be swingable around a horizontal axis. A chassis extending above the turntable, a chucking plate attached so as to face the turntable at the free end of the chassis, and an optical disc to be inserted is carried by the other side of the turntable. In a loading mechanism of an optical disc player, the slide plate is slidably attached to the chassis in the optical disc insertion direction, and the guide plate and the roller are arranged so as to face each other vertically. An abutting portion that protrudes downward near the front end of the slide plate in the optical disc insertion direction and a contact portion that protrudes downward from the chassis The slide plate is provided with locking means, and the locking means is bilaterally symmetric and rotatable with respect to the chassis. The rotating plate is supported, and the engaging pin is embedded in the rotating plate so as to engage with the slot provided in the chassis, and the shaft is embedded in the rotating plate. Further, the locking means normally locks the slide plate at a position for positioning the 8 cm optical disk in the insertion direction, and when both shafts are pushed by the outer circumference of the optical disk when the 12 cm optical disk is inserted, the locking means, While releasing the locking of the slide plate, when lowering the chucking plate,
Equipped with a stopper that regulates the lowering of the optical disk tip,
It is also achieved by the loading mechanism of the optical disc player.

In this specification, the directions and directions such as "upper", "lower" or "upper" and "lower" are as shown in the drawing when the optical disc player is placed as shown in FIG. Point in the direction. Therefore, when the optical disk player is placed in another direction, these directions and directions change according to the direction and direction of the optical disk player.

[0022]

According to the above construction, when the optical disc is inserted, the optical disc is sandwiched between the guide plate and the roller and is conveyed by the rotational driving of the roller, so that the tip of the optical disc comes into contact with the abutting portion of the slide plate. The outer circumference of the optical disc contacts the shaft. After that, by swinging the chassis around the horizontal axis and bringing the chucking plate into contact with the turntable from above the optical disc, the optical disc is fixedly held on the turntable.

Here, in the optical disk, when the chucking plate is lowered, the tip of the optical disc is swung downward with the portion sandwiched by the guide plate and the roller as a fulcrum, and then the guide plate and the roller are lowered. This causes the turntable to swing about the fulcrum. At that time, the tip of the optical disk will rise, but since the vicinity of the tip of the shaft has a taper, the outer circumference of the optical disk is pushed inward toward the center line in the insertion direction based on its shape. Will be done. Therefore, even if this optical disk is deviated from the center, accurate centering can be performed based on the tapered shape of the tip of the shaft.

The slide plate is provided with a locking means, which normally locks the slide plate at a position for positioning the 8 cm optical disk in the insertion direction, and both shafts are pushed by the outer circumference of the optical disk. When the lock is released, the locking means is set to 1 when unlocking the slide plate.
When inserting a 2 cm optical disc, both axes are always pushed by the outer periphery of the optical disc, and the slide plate
The 12 cm optical disc is slid to a position for positioning with respect to the insertion direction. As a result, the 12 cm optical disc can be positioned in the insertion direction. On the other hand, when inserting the 8 cm optical disc, when the optical disc tip is brought into contact with the abutting portion of the slide plate and the optical disc is at the center, the outer periphery of the optical disc does not come into contact with any shaft,
Further, when the optical disc is deviated from the center, the outer periphery of the optical disc comes into contact with only one of the shafts, so that the slide plate is held at a position for positioning the 8 cm optical disc in the insertion direction. As a result, the slide plate is located at the corresponding positioning position for both the 8 cm optical disk and the 12 cm optical disk.

Further, the locking means is planted in the rotary plate so as to engage with a rotary plate which is symmetrically and rotatably supported with respect to the chassis and a slot provided in the chassis. When the optical disc is inserted into the optical disc and the outer periphery of the optical disc comes into contact with the shaft, the shaft is pushed when the optical disc is inserted. By rotating the corresponding rotary plate, the engagement pin moves in the slot, and the locking of the slide plate with respect to the chassis is released.

Further, when a stopper for restricting the lowering of the tip of the optical disc when the chucking plate is lowered is provided, the outer periphery of the optical disc, which is pushed by the shaft when the optical disc is inserted, deviates from this shaft. There is no end.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to FIGS. In addition, since the Examples described below are preferred specific examples of the present invention, various technically preferable limitations are given. However, the scope of the present invention particularly limits the present invention in the following description. The embodiment is not limited to these embodiments unless otherwise stated.

1 and 2 show an embodiment of a loading mechanism of an optical disc player according to the present invention.
In these figures, a loading mechanism 10 is supported on a turntable 12 provided on a mechanical deck 11 (see FIG. 2) of an optical disc player and on one side of the turntable 12 swingably around a horizontal shaft 13a. Chassis 13, the chucking plate 14 provided at the free end of the chassis 13, and the turntable 1
The other side includes a guide plate 15 and a roller 16 which are vertically opposed to each other so as to sandwich and convey the inserted optical disc.

In FIG. 2, the turntable 12 is shown.
Is loaded with an optical disk and is rotationally driven by a drive mechanism (not shown). The mechanical deck 11 is further provided with an optical pickup (not shown). As a result, light such as laser light from the optical pickup is radiated to the optical disc mounted on the turntable and driven to rotate, and the return light from the recording surface of the optical disc is received by the light receiving element of the optical pickup. Detected by.

The chassis 13 is a turntable 12
Since it is swingably supported about a horizontal axis 13a extending in the tangential direction, its free end 13b is moved toward and away from the turntable 12 of the mechanical deck 11 by a chunking drive (not shown). It is rocked by the mechanism.

The chunking plate 14 is placed on the turntable 12 by contacting the upper surface of the turntable 12 when its free end is swung downward by the swing of the chassis 13. A so-called chucking is performed by fixing and holding the formed optical disk.

The guide plate 15 is fixedly arranged above the optical disc passage inside the optical disc insertion opening (not shown) provided on the outer surface of the case of the optical disc player. This so-called guide plate 15 preferably has a lower surface having a flat central portion in the direction perpendicular to the optical disc insertion direction A in the optical disc passage and inclined portions extending diagonally downward on both sides of the central portion. It is shaped like a drum.

The roller 16 is rotatably supported below the optical disk passage so as to face the guide plate 15 from below, and is rotatable about a rotation axis extending laterally in the optical disk insertion direction A. In addition, it is preferably formed in a so-called hourglass shape having a central portion having a relatively small diameter in the axial direction and tapered portions on both sides of the central portion whose diameter gradually increases toward the outside. ing.

The rotation axis of the roller 16 is
A drive mechanism (not shown) rotationally drives the optical disc in the direction of arrow X when inserting the optical disc and in the direction of arrow Y when ejecting the optical disc, and the rotation shaft is urged upward so that the outer peripheral surface of the optical disc is guided by the guide. It is adapted to be pressed against the lower surface of the plate 15.

Further, the chassis 13 has a slide plate 17 slidable in the optical disc insertion direction A with respect to the chassis 13, and a pair of rotary plates 18 rotatably attached to the lower surface of the slide plate 17. , 19 and 19 (see FIG. 1).

As shown in FIG. 1, the slide plate 17 rises upward from the rear end in the optical disc insertion direction A and further extends toward both sides with the engaging pieces 17a and upward in the optical disc insertion direction A near the front end. The slide shaft 17b that is planted so as to project
3 is engaged in a slot 13b provided along the central axis of the slot 3. As a result, the slide plate 17 is slidably supported with respect to the chassis 13 in the optical disc insertion direction A, and the slide shaft 17b comes into contact with the end portion of the slot 13b, so that the optical disc insertion direction is increased. Sliding to A is restricted. Further, the slide plate 17 has an abutting portion 17c formed so as to project downward from the front end in the optical disc insertion direction A.

The rotary plates 18 and 19 are the slide plates 17
Are symmetric with respect to the center line of the slide plate 17 and are rotatably supported near the front end of the slide plate 17 by rotary shafts 18a and 19a, respectively. further,
The rotating plates 18 and 19 are connected to the slide plate 17 by springs 18b and 19b which are stretched between them.
As shown by C, left-handedness and right-handedness are imparted.

The rotary plates 18 and 19 are the rotary shafts 18
Lock pins 20 and 21 projecting upward at a position slightly rearward of a and 19a, and restricting shafts 22 and 23 planted so as to project downward at a portion protruding further outward.
It has and.

The lock pins 20 and 21 are fitted in lock grooves 13c and 13d formed in the chassis 13, respectively. Here, the lock grooves 13c and 13d are respectively formed so as to extend in the optical disc insertion direction A, and are provided with engaging portions 13e and 13f extending from the rear end toward the center side.

As a result, when the slide plate 17 is located on the rear end side with respect to the chassis 13 as shown in FIGS. 1 and 2, the rotary plates 18 and 19 are biased by the springs 18b and 19b. Therefore, the lock pins 20, 21
Engage with the engaging portions 13e, 13f of the lock grooves 13c, 13d. Therefore, the slide plate 17 is prevented from sliding in the optical disc insertion direction A.

As shown in FIGS. 2 and 3, the restriction shafts 22 and 23 are formed so that their lower ends are tapered in a taper shape, and in the state of FIG. 1, they are 8 cm.
When the optical disc 30 is inserted along the center and the front end of the optical disc 30 abuts on the abutting portion 17c of the slide plate 17, the outer circumference of the optical disc 30 regulates the shaft 22,
It is arranged so as to come into light contact with 23 or approach with leaving a slight gap.

Further, the mechanical deck 11 is provided with a stopper 24 for restricting the lowering of the tip of the optical disk 30.

The loading device 10 according to the present embodiment is
With the above configuration, when inserting the 8 cm optical disk first, the insertion is performed as follows. That is, in FIG. 1, the 8 cm optical disc 30 inserted into the optical disc passage from the optical disc insertion opening of the optical disc player enters between the guide plate 15 and the roller 16 and is sandwiched between the guide plate 15 and the roller 16. It Here, the roller 16 is rotationally driven around the rotation axis in the direction of arrow X by a drive mechanism (not shown). Therefore, the optical disc 30 sandwiched between the guide plate 15 and the roller 16 is conveyed in the direction of arrow A toward the inside of the optical disc player based on the rotation of the roller 16, and the tip of the optical disc 30 slides. It abuts the abutting portion 17c of the plate 17.

At this time, the guide plate 15 and the roller 1
The optical discs 30 conveyed by the rotation of the rollers 16 due to the respective hourglass-shaped portions 6 are formed by the shapes of the guide plate 15 and the rollers 16 in the direction perpendicular to the conveyance direction, that is, the force toward the inner side, that is, the center. Will be received. Therefore, even if the center of the optical disc 30 is displaced from the centers of the guide plate 15 and the roller 16 at the time of insertion, the centering of the optical disc 30 can be performed based on the shapes of the guide plate 15 and the roller 16 when being conveyed by the roller 16. It can be done. Thereby, the optical disc 30
, Its center is moved to the center on the turntable.

At this time, the outer circumference of the optical disk 30 is lightly contacted with the regulation shafts 22 and 23 on both sides or is approached with a slight gap. Therefore, the rotary plates 18, 19
Is held in its original position, the slide plate 17
The lock pins 20 and 21 of the rotary plates 18 and 19 are engaged with the engaging portions 13e and 1 of the lock grooves 13c and 13d of the chassis 13, respectively.
3f is engaged. Thus, since the slide plate 17 is locked at the position shown in FIGS. 1 and 2, the optical disc 30 is conveyed in the optical disc insertion direction A at the position where it abuts on the abutting portion 17c of the slide plate 17. Stops.

Subsequently, the chassis 13 is rotationally driven around the horizontal shaft 13a by a drive mechanism (not shown), and the chucking plate 14 attached to the free end thereof.
Descends. At this time, the optical disk 30 moves the guide plate 15
Since the optical disc 30 is sandwiched by the roller 16 and the roller 16, the chucking plate 14 is located near the center of the optical disc 30.
By pushing down with the guide plate 15 and the roller 16, it swings in the direction of arrow P in FIG. Since the optical disc 30 is pushed in the optical disc insertion direction A by the roller 16,
The leading end of the slide plate 17 descends while sliding in contact with the contact portion 17c of the slide plate 17. Thus,
As shown in FIGS. 4 to 6, the optical disc 30 is stopped from swinging in the direction of the arrow P with the tip of the optical disc 30 placed on the stopper 24.

Further, the chassis 13 is rotationally driven around the horizontal axis 13a, the chucking plate 14 descends, and at the same time, the guide plate 15 and the roller 16 start descending. As a result, the optical disk 30 swings in the direction of arrow Q in FIG. 5 with the mounting point on the stopper 24 as a fulcrum. The turntable 1 is near the center of the optical disk 30.
After the contact with the turntable 2, the placement table 12a on the turntable 12 is used as a fulcrum to swing in the direction of arrow Q in FIG.
At this time, since the tip of the optical disk 30 is pressed by the contact portion 17a of the slide plate 17 by the rotation of the roller 16, the tip of the optical disk 30 moves up while sliding on the contact portion 17a.

Thus, the chucking plate 14
However, the optical disc 30 is fixedly held on the turntable 14 by being placed on the turntable 14 with the optical disc 30 interposed therebetween.

Here, when the 8-cm optical disc 30 is inserted, for example, when a center shift toward the left side of the optical disc 30 occurs as shown by a chain line in FIG.
When its tip comes into contact with the contact portion 17c of the slide plate 17, its outer periphery pushes the regulation shaft 22 outward. As a result, the rotary plate 18 is rotated clockwise against the tension of the spring 18b, so that the lock pin 20 is disengaged from the engaging portion 13e of the lock groove 13c of the chassis 13.
On the other hand, since the optical disc 30 does not come into contact with the regulation shaft 23, the rotary plate 19 does not rotate, and therefore the lock pin 21
Remains engaged with the engaging portion 13f of the lock groove 13c of the chassis 13. Thus, the slide plate 17 is shown in FIG.
Since the optical disc 30 is held at the position shown in (4), the 8 cm optical disc 30 can be positioned.

From this state, the chucking plate 14 is lowered to press the vicinity of the center of the optical disc 30, and the optical disc 30 swings downward with the nipping point between the guide plate 15 and the roller 16 as a fulcrum. The tip is placed on the stopper 24. At this time, the optical disc 3
Since the outer periphery of 0 slides to the tapered portion of the regulation shaft 22, the rotary plate 18 rotates counterclockwise due to the tension of the spring 18b, the regulation shaft 22 returns to its original position, and the lock pin 20 will be engaged with the engaging portion 13e.

After that, the chassis 13 is driven to rotate around the horizontal shaft 13a, the chucking plate 14 descends, and at the same time, the guide plate 15 and the roller 16 start descending. As a result, the optical disk 30 swings in the direction of arrow Q in FIG. 5 with the mounting point on the stopper 24 as the fulcrum,
After the vicinity of the center of the optical disk 30 contacts the turntable 12, the mounting point 12 on the turntable 12
It swings in the direction of arrow Q in FIG.

At this time, the tip of the optical disc 30 is
The contact portion 17 of the slide plate 17 is rotated by the rotation of the roller 16.
Since it is pressed by a, it rises while sliding on the contact portion 17a, and the outer periphery of the optical disc 30 becomes
While sliding along the tapered portion of the regulation shaft 22 that has returned to the original position, it will rise. As a result, the optical disc 30 is pushed toward the center along the tapered portion of the regulation shaft 22, and the center of the optical disc 30 is accurately centered with respect to the center of the chassis 13 and the turntable 12. It will be.

On the other hand, when the 8-cm optical disc 30 is inserted and the center of the optical disc 30 shifts to the right, the tip of the optical disc 30 moves toward the slide plate 1.
When contacting the contact portion 17c of No. 7, the outer periphery of the contact portion 17c pushes the regulation shaft 23 outward. Therefore, contrary to the above-described case of the center shift to the left, the optical disc 30
When the tip of the optical disc 30 rises, the outer circumference of the optical disc 30 slides up along the tapered portion of the regulation shaft 23, so that the optical disc 30 moves toward the center along the tapered portion of the regulation shaft 23. It is pushed to and centered accurately.

On the other hand, when inserting a 12 cm optical disc, the insertion is performed as follows. That is, in FIG. 7, the 12 cm optical disc 31 inserted into the optical disc passage from the optical disc insertion opening of the optical disc player is
It enters between the guide plate 15 and the roller 16 and is sandwiched between the guide plate 15 and the roller 16. As a result, the optical disc 31 sandwiched between the guide plate 15 and the roller 16 is conveyed in the direction of arrow A toward the inside of the optical disc player based on the rotation of the roller 16, and the tip of the optical disc 31 is It abuts on the abutting portion 17c of the slide plate 17.

At this time, the guide plate 15 and the roller 1 are
Since the respective 6 are formed in a drum shape, the optical disc 31 conveyed by the rotation of the roller 16 has a force toward the inner side, that is, toward the center in the direction perpendicular to the conveying direction due to the shapes of the guide plate 15 and the roller 16. Will be received. Therefore, even if the center of the optical disc 31 is deviated from the centers of the guide plate 15 and the roller 16 at the time of insertion, the centering is performed based on the shapes of the guide plate 15 and the roller 16 when being conveyed by the roller 16. It can be done. Thereby, the optical disc 30
, Its center is moved to the center on the turntable.

Further, at this time, the optical disk 30
The outer circumference pushes the regulation shafts 22 and 23 on both sides outward. As a result, the rotary plate 18 has the spring 18b.
Is rotated clockwise against the tension of the spring 19b, and the rotary plate 19 is rotated counterclockwise against the tension of the spring 19b.
1 is the lock grooves 13c and 13d of the chassis 13, respectively.
Is disengaged from the engaging portions 13e and 13f. Thus, the slide plate 17 has the contact portion 17a with the arrow A by the optical disk 31 conveyed in the arrow A direction by the rotation of the roller 16.
By being pushed in the direction, it slides in the optical disc insertion direction A with respect to the chassis 13.

As shown in FIG. 8, the slide plate 17 stops sliding in the optical disc insertion direction A when the slide shaft 17b contacts the front end of the slot 13b. At this time, the lock pins 20 and 21 of the rotary plates 18 and 19 contact the side walls of the lock grooves 13c and 13d. As a result, the regulation shafts 22 and 23 are separated from the outer circumference of the optical disc 31. After that, the chassis 13 rotates around the horizontal axis 13a, and the chucking plate 14 descends, whereby the optical disc 31
Will be chucked on the turntable 12.

As described above, in the above-described embodiment, when the optical disc is inserted, the tip of the optical disc comes into contact with the abutting portion of the slide plate, and the outer circumference of the optical disc comes into contact with the shaft. After that, the optical disc is lowered by the chucking plate, and the tip of the optical disc is swung downward with the portion sandwiched by the guide plate and the roller as a fulcrum, and then the guide plate and the roller are lowered to turn the turntable. It swings about.

At that time, although the tip of the optical disk rises, since the vicinity of the tip of the shaft has a taper, the outer circumference of the optical disk is pushed inward toward the center line in the insertion direction based on its shape. To be done. Therefore, even if this optical disk is deviated from the center, accurate centering can be performed based on the tapered shape of the tip of the shaft.

Therefore, centering of an optical disk, particularly an 8 cm optical disk, can be performed with high accuracy without increasing the accuracy of parts and the accuracy of assembly. Thus, with a simple structure, the assembly can be easily performed, so that the cost is reduced.

The slide plate is provided with a locking means, which normally locks the slide plate at a position for positioning the 8 cm optical disk in the insertion direction, and both shafts are pushed by the outer circumference of the optical disk. When the locking of the slide plate is released, the locking means is
For both the cm optical disc and the 12 cm optical disc, the slide plate is moved to the corresponding positioning position, so that automatic discrimination between the 8 cm optical disc and the 12 cm optical disc can be performed mechanically.

Further, the locking means is planted in the rotary plate so as to be engaged with the rotary plate rotatably and symmetrically rotatable with respect to the chassis and the slot provided in the chassis. When the optical disc is inserted, when the optical disc is inserted, the outer periphery of the optical disc comes into contact with the shaft to release the locking of the slide plate with respect to the chassis. To be done.
Therefore, the locking of the locking means can be released by a simple mechanism.

Further, when a stopper is provided for restricting the lowering of the tip of the optical disc when the chucking plate is lowered, the outer periphery of the optical disc, which is pushed by the shaft when the optical disc is inserted, deviates from this shaft. There is no end. Therefore, after that, when the tip of the optical disc rises, the outer periphery of the optical disc moves along the taper portion of the shaft,
Accurate centering can be performed by being pushed inward.

In the embodiment described above, the regulating shaft 2
The lower ends of the optical discs 2 and 23 are tapered and have a conical shape. However, the present invention is not limited to this.
It suffices that the optical disc 30 be pushed toward the center by sliding along the lower end of the optical disc 3.
For example, a shape such as a hemispherical shape that gradually becomes thinner toward the lower side is appropriately adopted.

[0065]

As described above, according to the present invention, not only an optical disc having a large diameter but also an optical disc having a smaller diameter can be inserted so that the centering can be accurately performed. A player loading mechanism will be provided.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing a state where an 8-cm optical disc has been completely inserted in an embodiment of a loading mechanism according to the present invention.

FIG. 2 is a schematic side view of the loading mechanism of FIG.

FIG. 3 is a schematic front view of the loading mechanism of FIG.

FIG. 4 is a schematic plan view showing a chucking state of an 8 cm optical disc in the loading mechanism of FIG.

5 is a schematic side view of the loading mechanism of FIG.

6 is a schematic front view of the loading mechanism of FIG.

7 is a schematic plan view showing a state where a 12 cm optical disc is being inserted in the loading mechanism of FIG. 1. FIG.

8 is a schematic plan view showing a state where insertion of a 12 cm optical disc in the loading mechanism of FIG. 1 is completed.

FIG. 9 is a schematic perspective view showing an example of a loading mechanism in a conventional optical disc player.

[Explanation of symbols]

 10 Loading Mechanism 11 Mechanical Deck 12 Turntable 13 Chassis 14 Chucking Plate 15 Guide Plate 16 Roller 17 Slide Plate 18 Rotating Plate 19 Rotating Plate 20 Lock Pin 21 Lock Pin 22 Restricting Axis 23 Restricting Axis 24 Stopper 30 8cm Optical Disk 31 12cm Optical Disk

Claims (5)

[Claims] 1. A turntable on which an optical disc is placed and driven to rotate, a chassis which is swingably supported on one side of the turntable about a horizontal axis and extends on the turntable, and the chassis. A chucking plate attached so as to face the turntable at its free end, and a chucking plate disposed on the other side of the turntable so as to vertically face the optical disc to be inserted and conveyed. An optical disk player loading mechanism including a guide plate and a roller, and a slide plate slidably attached to the chassis in the optical disk insertion direction; The abutting portion that projects downward and the abutting portion that is provided so as to project downward from the chassis A loading mechanism for an optical disk player, comprising: a shaft formed to be thin. 2. The slide plate is provided with a locking means, which normally locks the slide plate at a position for positioning the 8 cm optical disc in the insertion direction,
2. The loading mechanism for an optical disk player according to claim 1, wherein the locking means releases the locking of the slide plate when both shafts are pushed by the outer circumference of the optical disk. 3. The locking means is rotatably supported on the chassis in a bilaterally symmetric manner, and the locking means is planted on the rotation plate so as to engage with a slot provided in the chassis. And an engaging pin, the shaft,
The loading mechanism for an optical disk player according to claim 1 or 2, wherein the loading mechanism is embedded in each rotating plate. 4. The loading mechanism for an optical disc player according to claim 1, further comprising a stopper for restricting the lowering of the tip of the optical disc when the chucking plate is lowered. 5. A turntable on which an optical disk is placed and driven to rotate, a chassis which is swingably supported on one side of the turntable about a horizontal axis and extends on the turntable, and the chassis. The chucking plate is attached so as to face the turntable at its free end, and the chucking plate is placed on the other side of the turntable so that the optical disc to be inserted is sandwiched and conveyed vertically. An optical disk player loading mechanism including a guide plate and a roller, and a slide plate slidably attached to the chassis in the optical disk insertion direction; A contact part protruding downward and a tapered tip provided so as to protrude downward from the chassis. The slide plate is provided with locking means, and the locking means is rotatably supported on the chassis in a bilaterally symmetric manner, and With the engaging pin implanted in this rotating plate so as to engage with the slot provided in the chassis,
The shafts are respectively implanted in the rotary plates, and further, the locking means locks the slide plate at a position for positioning the 8 cm optical disc in the insertion direction,
When both shafts are pushed by the outer circumference of the optical disk when the 12 cm optical disk is inserted, this locking means releases the locking of the slide plate and restricts the lowering of the optical disk tip when the chucking plate lowers. A loading mechanism for an optical disk player, which is provided with a stopper for