JPH0621074Y2 - Disc player - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a disc player such as a compact disc player and a video disc player, and more particularly to a disc player capable of reproducing discs having different diameters with the same disc player. Regarding

[Conventional technology]

Conventionally, a compact disc has a relatively large diameter (12 cm in diameter) on which a large number of songs are recorded. However, with the spread of CD players in recent years, the compact disc has a smaller diameter (8 cm in diameter). Then, a disc on which a few songs are recorded, that is, a so-called CD single has spread, and it is required to develop a CD player capable of reproducing both the large disc and the small disc.

Conventionally, when a disc having a different shape is inserted from the same insertion port and used, an adapter 1 as shown in FIG. 10 is used. This adapter 1 has a base disk 2 formed to have the same diameter as a large-diameter disk, and has support arms 3 which are elastic and can be expanded at several places. The small-diameter disk (S) is clamped at the center of the adapter by the clamp protrusion 4 provided on the support arm 3. By inserting the adapter 1 through the insertion opening of the CD player, the disc (S) having a small diameter can be reliably clamped to the turntable with reference to the outer circumference of the base disc 2.

[Problems to be solved by the device]

However, when a small-diameter disk is attached to the adapter 1 and inserted through the insertion opening of the CD player as in the conventional case, the kerf portion 3a (support arm 3) existing between the support arm 3 of the adapter and the base disk 2 is provided. There is a case where a groove for allowing elastic expansion is passed over the optical detection means for detecting the insertion of the disk during the disk loading. In this case, the detection means causes erroneous detection, the disc loading operation is stopped midway, and there arises a problem that the disc cannot be mounted at a predetermined position or cannot be ejected.

Further, a general user thinks that a small-diameter disc can be used as it is, and when a disc having a smaller diameter is inserted from the insertion slot, the disc cannot be ejected, and the CD player itself cannot be used.

Further, in the case of a car-mounted CD player, it is very complicated to use the adapter 1 shown in FIG. 10, and when the adapter 1 falls under the seat in the vehicle compartment, it has a small diameter. The disc playback operation itself becomes impossible.

The present invention solves the above-mentioned problems, and when discs of different diameters are inserted from the same insertion opening, it is possible to position a small-diameter disc and a large-diameter disc, and yet to make this large-diameter disc. An object of the present invention is to provide a disc player in which a stopper for positioning the disc can be reliably operated when the disc is inserted.

[Means for Solving the Problems]

The disc player according to the present invention is a disc player which is provided with an insertion slot for inserting a disc having a different diameter and a disc drive mechanism located at the back of the insertion port, and a disc with a small diameter is provided in the disc insertion passage. Is placed at a position where it hits the disc when it is inserted into the disc drive mechanism, and a stopper is provided that moves with the disc to the inner side of the disc insertion passage when the large-diameter disc is inserted into the disc drive mechanism. At the guide portion that moves the stopper in the depth direction of the disc insertion passage, rollers are installed on the plurality of pins that move together with the stopper, and the rollers are inserted into the guide groove formed in the fixed portion. There is something.

[Action]

In the above means, when a disc having a smaller diameter is inserted from the insertion port, the disc having a smaller diameter enters the inner part of the insertion port due to the driving force of the driving roller or the like, and the edge of the disc abuts the stopper midway. Then, the small-diameter disk hits the stopper to be reliably installed and clamped on the disk drive mechanism. Further, when a large-diameter disk is inserted and enters the inner part of the insertion port by the driving force of the driving roller or the like, the stopper is pushed by the edge part of the large-diameter disk and retracts in the depth direction of the passage. When the stopper moves to the innermost portion, the large-diameter disk is localized at a predetermined position and clamped at a position where it can be driven by the disk drive mechanism. When the stopper moves in the depth direction of the passage, the plurality of pins that move together with the stopper move in the guide groove of the fixed portion via the rollers, so that the resistance of the guide portion can be minimized. Therefore, when a large-diameter disk is moving in the back direction and the disk is displaced and hits the stopper one-sidedly due to vibration of the automobile, the force with which the disk presses the stopper becomes uneven. Although the pin is pressed against the edge of the guide groove, the roller mounted on the pin rolls in the guide groove, so that the pin can be prevented from becoming immobile due to friction in the guide groove.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 9B.

FIG. 1 is a front view showing an operating portion of a disc player. In this figure, 11 is an operation panel. The operation panel 11 includes a display 13 including a liquid crystal display element for performing various displays, and a small-diameter disk (S), for example.
And a plurality of types of discs having different diameters, such as a large-diameter disc (L), are provided. As shown in FIG. 2, the operation panel 11 is mounted on the front surface of the player main body (H) so that each function of the player main body (H) can be operated.

The player body (H) will be described in detail with reference to the drawings starting from FIG.

2 and 3 are plan views of the apparatus main body (H), FIG.
The figure is a side view thereof.

In FIGS. 2 and 3, reference numeral 14 is a drive roller having a diameter gradually increasing toward both ends so as not to sandwich the center of the large-diameter disk (L). One end of the drive roller 14 is pivotally supported by one side chassis 15a, and the other end is pivotally supported by the side chassis 15b. A gear 16 is attached to the drive roller 14 outside the side chassis 15b. This gear 16 is the fifth
As shown in the drawing, it meshes with various gears 18, 18 ... Which transmit the rotational force of the motor 17 provided on the side chassis 15b, and the rotational force of the motor 17 causes the drive roller 14 to rotate.
Is driven to rotate.

The opposite side of the drive roller 14 is a plastic facing member 14a as shown in FIGS. 9A and 9B. The surface of the facing member 14a facing the drive roller 14 is
It has a concave curved surface. This concave shape is the driving roller 14
The radius of curvature of the drive roller 14 is opposite to that of the drive roller 14 and has the same rate of change as that of the drive roller 14. The drive roller 14 is opposed to the opposing member 14a by a predetermined spring pressure during the disc pulling operation.
The disk is pinched by and the drive roller 14 is allowed to escape downward after the disk is completely inserted. The facing member 14a does not rotate,
The disc fed by the drive roller 14 simply slides. However, as the facing member 14a, it is also possible to use a rotatable roller having a shape in which both ends are gradually thickened like the driving roller 14. In the disc pulling operation by the drive roller 14 and the facing member 14a, when a large-diameter disc (L) is used,
As shown in the figure, a large-diameter disk (L) is attached to the drive roller 1
4 can be driven at the thickest position. Therefore, the large-diameter disc (L) can be strongly sandwiched by the sandwiching force of the spring pressure between the drive roller 14 and the facing member 14a, and the disc is pulled in by a stronger driving force. When a small-diameter disk (S) is used, as shown in FIG. 9B, the small-diameter disk (S) is driven by a thin portion on the center side of the drive roller 14. Therefore, the small-diameter disk (S) is
4 and the opposing member 14a are sandwiched by a relatively weak force, and the small-diameter disk (S) is a large-diameter disk (L).
Will be pulled in with a force weaker than the driving force for driving. Further, when the small-diameter disc (S) is inserted at a position offset from the center of the passage and only one end of the disc (S) is sandwiched by the large-diameter portion of the drive roller 14 and pulled in, the disc (S) is drawn. Since the balance of the driving force acting on the disk is lost, the disk (S) is guided to the central position of the driving roller 14, that is, the central position of the passage while being fed.

2 and 3, reference numeral 20 indicates a disk drive unit. This disk drive unit 2
0 is supported by four dampers 19a and 19b (the other two are not shown in the figure) for absorbing vibration, which are attached to both side chassis 15a and 15b. The presence of this damper protects the disk drive unit 20 from vibrations and impacts of the vehicle body when it is used for vehicle installation.

As shown in FIG. 4, the lower chassis 22 of the disk drive unit 20 includes a turntable 23 for rotating the disk (S) or (L), and a small-diameter disk (S) or a large-diameter disk (L). An optical pickup mechanism 21 for reading the written signal is provided. An upper chassis 25 is provided on the lower chassis 22, and the upper chassis 25 is mounted rotatably in the vertical direction by supporting a support hole 25a at the base portion thereof by a shaft (not shown). The upper chassis 25 is constantly pulled toward the lower chassis 22 by a spring (not shown). Turntable 2 on upper chassis 25
A clamper 26 that clamps the disk (S) or (L) mounted on the No. 3 is rotatably supported, and the clamper 26 is arranged on the side of the upper chassis 25 so as to descend onto the turntable 23. The restricting piece 27 for restricting is formed integrally by bending. Adjacent to the regulation piece 27 is a waiting portion 27a for inclining the upper chassis 25 upward and waiting until the disc (S) or (L) is supplied onto the turntable 23. The inclined portion 27b is formed. This inclined portion 27b
On the other hand, when the disc (S) or (L) is ejected, the release pin 28 (see FIG. 5) for releasing the clamp slides, and when the release pin 28 enters under the standby portion 27a, the release pin 28 moves upward. The chassis 25 can be lifted.
The release pin 28 is driven in the left-right direction in FIG. 5 by a rack mechanism or the like that meshes with any of the various gears 18, 18 ... Provided on the side chassis 15b. The solenoid SOL shown in FIG. 5 is for setting the operation timing of the release pin 28 and the like.

As shown in FIG. 4, a triangular slider 30 made of sheet metal is provided on the lower surface of the upper chassis 25 (the surface facing the lower chassis 20).
A stopper 31 is attached to the. As shown in FIG. 2 and FIG. 8A, the stopper 31 is formed by bending with a radius of curvature which is the same as or slightly larger than the radius of the large diameter disc (L). . The stopper 31 is formed of resin or the like so as to be curved with the above-mentioned curvature, and the concave curved surface side thereof faces the direction of the turntable 23. The slider 30
It is also possible to integrally form the stopper 31 with resin. A pin 32 is attached to the upper surface of the triangular slider 30. A roller 32 a is externally mounted on the pin 32, and the upper chassis 25 is mounted from above the upper chassis 25.
Is inserted into the linear guide groove 34 formed on the lower end 32b, and the lower end 32b thereof is attached to the mounting hole 3 formed in the slider 30.
It is caulked and fixed to 0a. Further, another pin 33 is fixed to the slider 30, and the roller 33a is fixed to this pin 33.
Is externally inserted and is inserted into the guide groove 34. Further, the pin 33 projects above the upper chassis 25. In FIG. 4, the slide washer 33 is mounted on the roller 33a.
b is shown, but in reality, this slide washer 3
3b is sandwiched between an upper surface of the upper chassis 25 and an eject lever 45, which will be described later, and at this position, the pin 3 is inserted into the pin 33 which extends through the guide groove 34 and extends upward.
The rollers 32a and 33a are inserted in the guide groove 34 with almost no looseness, and the rollers 30a and 33a roll in the guide groove 34 so that the slider 30 can move. There is.

A pair of lock release levers 35a and 35b are rotatably supported on the slider 30 by pins 36a and 36b, respectively. Each lock release lever 35a and 35
b is formed in a dogleg shape. Downward disc regulating protrusions 37a and 37b are attached to the ends of the long arms of the lock release levers 35a and 35b. The upper ends of the restricting protrusions 37a and 37b are tapered surfaces 37c and 37d, and stopper flanges 37e and 37f are formed at the lower ends. As shown in FIG. 7, when the disc (L) or (S) is inserted and hits the regulation protrusions 37a and 37b, the tip of the disc is regulated by the stopper flanges 37e and 37f.
And 37b from the lower side, and when the tip of the disk faces upward, the tapered surfaces 37c and 37d
It is designed to be guided downward by.

Lock pins 38a and 38b are attached upward at the tips of the short arms of the lock release levers 35a and 35b. The upper chassis 25 is provided with a pair of auxiliary holes 41a and 41b with a guide groove 34 interposed therebetween. The pair of auxiliary holes 41a and 41b extend linearly so as to be parallel to the guide groove 34, and the lock pins 38a and 38b are inserted into the auxiliary holes 41a and 41b. Lock grooves 42a and 42b are integrally formed at the turntable side ends of the auxiliary holes 41a and 41b, respectively. The lock grooves 42a and 42b are formed so as to approach each other. Also, the lock groove 42a
And 42b and auxiliary holes 41a and 41b are formed with inclined sides 42c and 42d at the boundary corners. This inclined side 42c
And 42d are formed, the lock pin 38
When the a and 38b are locked to the lock grooves 42a and 42b, the facing area of the locking portion is minimized (see FIG. 8A), and the lock pins 38a and 38b are locked to the lock grooves 42a and 4b.
It can be released smoothly when it comes off from 2b. The pair of lock release levers 35a and 35b
The short arms are connected by a spring 39. The force of the spring 39 urges the lock release levers 35a and 35b so that the pair of lock pins 38a and 38b approach each other. The biasing force of the spring 39 is set to be fairly weak.

As shown in FIG. 8A, when the slider 30 is moving to the left in the drawing, the pair of lock pins 38 and 38b attracted by the spring 39 causes the lock grooves 42a at the ends of the auxiliary holes 41a and 41b, respectively. And 42b. In this state, the slider 30 is locked so that it cannot move to the right in the figure, that is, in the depth direction of the passage. When the slider 30 is thus locked, the pair of disc restriction protrusions 37a and 37b provided on the lock release levers 35a and 35b are located slightly to the left of the arc-shaped stopper 31 in the figure. .
When the center of the small-diameter disk (S) substantially coincides with the center of the turntable 23, the lock pins 38a and 3
In the state where 8b is locked in the lock grooves 42a and 42b, the pair of disc regulating protrusions 37a and 37b come into contact with the edges of the small-diameter disc (S). That is,
The small-diameter disk (S) supplied onto the turntable 23 has its edge (a) portion substantially contacting the center of the arc-shaped stopper 31. At this time, the edge portions (b) and (c) Both parts come into contact with the disc regulating protrusions 37a and 37b. The small diameter disc (S) is
Turntable 23 at three points (b) and (c)
It will be positioned so as to reach the center of. Further, the edge of the disc passage and each disc regulating projection 3 shown in FIG.
The distance 1 to the 7a and 37b is set to be smaller than the radius of the small-diameter disk (S).

When a large-diameter disk (L) is supplied, the radius of the edge of the large-diameter disk (L) is larger than the radius of the small-diameter disk (S), and moreover, the curvature of the concave curved surface of the stopper 31 is the disk (L). Since the radius (a) substantially coincides with the radius of the disk (L), when the edge (b) of the disk (L) hits the stopper 31, the disk regulation projection 37a is formed by the edges (d) and (e).
And 37b are pushed to the right in the figure (toward the passage). As a result, the lock release levers 35a and 35b are locked by the spring 3
The pair of lock pins 38a and 38b are rotated in opposition to each other so that the pair of lock pins 38a and 38b move toward the lock groove 42 of the upper chassis 25.
Remove from a and 42b. At this time, the lock grooves 42a and 42
The slanted sides 42c and 42d at the edge of b ensure that the lock is released. When the slider 30 is unlocked, the slider 30 can move to the right in the figure. That is, when a large-diameter disk (L) is supplied,
The slider 30 is unlocked, and the stopper 31 is pushed inward by the disk (L).

An eject lever 45 is provided on the upper surface of the upper chassis 25. This eject lever 45 has a support pin 4
It is rotatably supported by 6. A long hole 45a is formed at the tip of the eject lever 45, and the pin 33 provided on the slider 30 is attached to the upper chassis 25.
It is inserted into the elongated hole 45a of the eject lever 45 through the slide washer 33b which penetrates the roller 33a in the guide groove 34 formed in. The linear movement of the slider 30 along the guide groove 34 is interlocked with the rotational movement of the eject lever 45. A reversing spring 47 is hung between the base arm 45b of the eject lever 45 and the upper chassis 25. As shown in FIG. 8A, when the slider 30 is moving toward the insertion opening, the eject lever 45 is biased counterclockwise by the reversing spring 47, and the slider 30 is pressed leftward in the drawing. When the slider 30 is unlocked and the slider 30 moves about 2/3 strokes to the right in the figure, the urging direction of the reversing spring 47 is reversed, and the eject lever 45 is urged clockwise to move the slider 30. 30 is pushed in the right direction of the drawing (direction behind the passage).

A drive lever 51 is provided on the lower surface of the end portion of the upper chassis 25, and is rotatably supported by the upper chassis 25 by a support pin 52. A drive pin 53 is provided at the arm tip of the drive lever 51.
3 passes through a notch (not shown) formed in the upper chassis 25 and projects upward. And this drive pin 53
Is a long hole 45 formed in the eject lever 45.
It is inserted in c. The actuating piece 5 is attached to the drive lever 51.
1a is formed, and the operating piece 51a projects from the side edge of the upper chassis 25. When the operating piece 51 is driven in the clockwise direction by an eject drive mechanism (not shown), the eject lever 45 rotates counterclockwise and the slider 30 is pushed forward.

Next, a disc loading operation in the disc player of the above embodiment will be described.

When the disc is not being played, the upper chassis 25
Has been lifted, which causes the clamper 26 to move away from the turntable 23. Also upper chassis 2
The eject lever 45 provided on the upper surface of 5 is rotated counterclockwise by the reversing spring 47, and the slider 30 connected by the eject lever 45 and the pin 33 is pushed out toward the insertion port 12. ing. Then, a pair of lock release levers 35a and 35
b are attracted to each other by the spring 39, and the lock pins 38a and 38b are locked to the lock grooves 42a and 42b at the ends of the auxiliary holes 41a and 41b formed in the upper chassis 25.
And the slider 30 is locked. Further, the pair of disc restricting protrusions 37a and 37b are located further than the stopper 31 toward the insertion port 12 side.

When a small-diameter disk (S) is inserted, the drive roller 14
And the opposing member 14a clamps and draws in.
As shown in FIG. 2, the small-diameter disk (S) is inserted into the insertion slot 1
When inserted from approximately the center of 2, the disc (S) is sandwiched and fed by the drive roller 14 and the opposing member 14a in the state shown in FIG. 9A (the small diameter portion of the drive roller 14). Drive roller 14 and opposing member 14
Due to the concave shape of a, the disc (S) is fed through the center of the insertion passage. As shown in FIG. 2 and FIG. 8A, the small-diameter disc (S) has a (b) part and a (c) part when the (a) part at its tip hits the substantially central part of the stopper 31. It comes into contact with the disc regulating projections 37a and 37b. That is, the disc regulating protrusions 37a and 3
7b are not pushed in the direction of the stopper 31, so that the lock pins 38a and 38b provided on the lock release levers 35a and 35b are locked by the lock groove 4 at the same time.
It does not come off from 2a and 42b. Therefore, in this case, the slider 30 remains locked and does not move to the right in FIGS. 2 and 8A. Therefore, the disc (S) remains at the position where the center of the disc (S) reaches the turntable 23.

In the case of a small-diameter disc (S), it is not always inserted in the center of the insertion opening 12, and for example, the third
As shown in the figure, the disk (S) is attached to the side chassis 15
It may be inserted in a state of being offset to the side a. Even in such a case, the disc (S) can be guided to the central position of the passage. This is because the drive roller 14 and the facing member 14a are concave in the center as shown in FIG. 9A, so that one side edge of the small-diameter disk (S) is clamped by the large-diameter portion of the drive roller 14. Drive roller 1
This is because the axis of No. 4 tilts and the balance of the feeding force is lost, and a force acts to return the disc (S) to the center during the feeding operation. Discs that are sent even more biased (S)
The distance 1 between the disc regulation projection 37a that first hits the edge of and the passage end is smaller than the radius of the small-diameter disc (S). Therefore, when this disk is drawn in along the path shown in FIG.
The disc (S) is rotated and fed so that its (a) portion hits the stopper 31 with a as a fulcrum, and the center of the disc is guided onto the turntable 23. At this time, the edge of the disc (S) pushes the disc regulating protrusion 37a to the right in the drawing, and this force causes the lock releasing lever 35 provided with the disc regulating protrusion 37a.
a rotates clockwise, and the lock pin 38a is disengaged from the lock groove 42a of the upper chassis 25. However, the lock pin 3 provided on the other lock release lever 35b
8b does not come out of the lock groove 42b, the slider 30
Remains locked, and the stopper 31 is not pushed in the depth direction of the passage. Also small diameter disc (S)
The same is true when the sheet is fed to the side opposite to that shown in FIG.

When it is recognized by the detection operation described later that the center of the disk (S) has reached the top of the turntable 23, the solenoid (SOL) is excited, the motor power to the drive roller 14 is cut off, and the motor 17 The release pin 28 shown in FIG. 5 is driven to the right by the driving force of. Therefore, the release pin 28 separates from the restriction piece 27, the upper chassis 25 lifted by the release pin 28 is lowered by the force of the spring, and the clamper 26 and the turntable 23 clamp the disc (S). In conjunction with this operation, the drive roller 14 descends and separates from the disc.

Next, when a large-diameter disk (L) is inserted from the insertion opening 12 and fed by the drive lever 14 (see FIG. 9A), as shown in FIG. ) Part and (e) part are almost at the same time,
Hit a and 37b. Further, since the stopper 31 has a concave shape substantially along the outer circumference of the disc (L),
Hits almost the entire surface of the stopper 31, so that both the restriction protrusions 37a and 37b are pushed toward the stopper 31 almost at the same time. Therefore, the lock release levers 35a and 35a provided with the restriction protrusions 37a and 37b, respectively.
b rotate in the direction of opening each other against the spring 39, and the lock pins 38a and 38
b almost simultaneously with the lock grooves 42a and 42 of the upper chassis 25.
The slider 30 is released from b, and the slider 30 is unlocked. Therefore, when the disc (L) is further fed by the drive roller 14, the disc 31 is pushed by this and the stopper 31 is moved in the passage depth direction. When it moves a certain distance (for example, about 2/3 stroke), the eject lever 45 that rotates together with the slider 30 is rotated clockwise by the reversing spring 47, whereby the slider 30 and the stopper 31 automatically move in the depth direction of the passage. To be made. With the stopper 31 moved in the passage depth direction, the center of the disk (L) is located on the turntable 23.

When it is detected that a large-diameter disk (L) has been loaded, the upper chassis 2 is moved as in the case of the small-diameter disk (S).
5, the disk (L) is clamped by the clamper 26 and the turntable 23. Further, the drive roller 14 moves down from the disc.

When the above-mentioned large-diameter disk (L) is loaded, normally, the regulation projection 37 is formed by the edges (d) and (e) of the disk (L).
When a and 37b are pressed, the pressing force moves the slider 30 in the depth direction of the passage. However, in the middle of this moving operation, the disc (L) is displaced due to, for example, the vibration of an automobile when mounted on a vehicle, and as shown in FIG. 6, the disc (L) is separated from one of the regulation protrusions 37a, Only the other regulation protrusion 37b may be pushed by the disc (L). At this time, since the pressing force F acts only on one of the regulation protrusions 37b, a moment is generated in the slider 30, and one pin 32a is pushed in the f ₁ direction and the other pin 33 is pushed in the f ₂ direction, so that the guide groove 34 moves. Pressure is applied to the edges. However, since the rollers 32a and 33a are mounted on the pins 32 and 33 and the rollers 32a and 33a roll in the guide groove 34, even if the forces f ₁ and f ₂ are generated, the slider 30
Is not affected, and the slider 30 moves smoothly in the back direction.

Further, as shown in FIG. 7, even if the tip of the disc (L) moves up and down during the loading operation, the regulation projection 37
The tip of the disk is guided downward by the tapered surfaces 37c and 37d above the a and 37b, and the regulation projection 37
The stopper flanges 37e and 37f at the lower ends of the a and 37b prevent the tip of the disc from coming off from the restricting protrusions 37a and 37b.

Next, the operation of ejecting each disk will be described.

When ejecting a small-diameter disk (S), the clamper 26
Rises and the clamp is released. In addition, the drive roller 14
Rises to clamp the disc (S), and the power of the drive roller 14 ejects the disc (S).

In the ejection operation of the large-diameter disk (L), the drive lever 51 is driven in the clockwise direction by the eject drive mechanism (not shown). Along with this, the eject lever 45 is rotated counterclockwise, and when it is rotated to a certain angle, it is further rotated by the reversing spring 47, and the slider 30 and the stopper 31 are returned toward the insertion opening 12.

Further, in conjunction with this, the restriction piece 27 is lifted, the upper chassis 25 is rotated upward, and the disc clamp by the clamper 26 is released. Further, the drive roller 14 rises, the disc is held between the roller 14 and the facing member 14a, and the disc is ejected toward the insertion slot 12 by the reverse rotation of the drive roller 14.

Although the stopper 31 has a curved shape along the outer circumference of the large-diameter disk (L) in the illustrated embodiment, the stopper 31 has a curved shape.
May be a flat plate positioned behind the disc regulating protrusions 37a and 37b, or may be a plurality of protrusions arranged at positions along the curved curved surface of the embodiment shown in the drawing.

[Effect of device]

According to the present invention as described above, disks having different diameters can be inserted from the same insertion port and installed on the turntable of the disk drive mechanism without using an adapter. Further, the stopper is set to a position where it hits the small-diameter disc, and when the large-diameter disc is fed, the stopper retracts in the depth direction together with the disc. Therefore, it becomes possible to position both the small-diameter disc and the large-diameter disc.
Further, when a large-diameter disc is inserted, the stopper moves by the rolling of the roller mounted on the pin, so that the stopper moves smoothly. Further, even if the disk hits against the stopper and a moment acts on the stopper, the roller rolls in the guide groove, so that the stopper can move without causing frictional resistance.

[Brief description of drawings]

1 is a front view showing an operating portion of a disc player according to an embodiment of the present invention, FIGS. 2 and 3 are plan views of a disc player body according to an embodiment of the present invention, and FIG. 4 is an exploded view of a disc drive unit. FIG. 2 is a perspective view and FIG. 5 is a perspective view.
FIG. 6 is a side view of the drawing, FIG. 6 is a plan view showing a moving state of the slider when a large-diameter disk is one-sided against the restriction projection, and FIG. 7 is a side view showing a state where the disk tip is in contact with the restriction projection. FIGS. 8A and 8B are partial plan views of the disk drive unit showing the operations of the stopper and the unlocking mechanism, and FIG. 9A.
FIG. 9 and FIG. 9B are front views showing the drive roller and the facing member, and FIG. 10 is a plan view showing a conventionally used small-diameter disk adapter. S ... small-diameter disc, L ... large-diameter disc, 12 ... insertion slot, 14 ... drive roller, 23 ... turntable, 25 ...
Upper chassis, 26 ... Clamper, 28 ... Clamp release pin, 30 ... Slider, 31 ... Stopper, 32, 33 ... Roller, 32a, 33a ... Roller, 34 ... Guide groove, 35
a, 35b ... Lock release lever, 37a, 37b ... Disc restriction protrusion, 42a, 42b ... Lock groove, 45 ... Eject lever.

Claims (1)

[Scope of utility model registration request] 1. A disc player provided with an insertion port for inserting a disc having a different diameter and a disc driving mechanism located at the back of the insertion port, wherein a disc having a small diameter is provided in the disc insertion passage. A stopper is provided that is in a position to hit this disc when it is inserted into the drive mechanism and that moves to the back side of the disc insertion passage together with this disc when a large-diameter disc is inserted into the disc drive mechanism, In the guide portion for moving the stopper in the depth direction of the disc insertion passage, rollers are mounted on a plurality of pins that move together with the stopper, and the rollers are inserted into the guide groove formed in the fixed portion. Player