JPH0729278A - Disk player - Google Patents

Abstract

PURPOSE:To surely identify a disk with a diameter different from each other and to mount it on a disk driving mechanism. CONSTITUTION:A stopper 31 is supported movably on an upper chassis 25 supporting a clamper 26. Disk identifying projections 37a, 37b and lock pins 38a, 38b are provided on a pair of lock releasing levers 35a, 35b moving together with the stopper 31. The stopper 31 is locked when the lock pins 38a and 38b are enegaged with lock grooves 42a, 42b, and a small diameter disk is positioned by the stopper 31. Although no disk identifying projections 37a, 37b are depressed simultaneously by the small diameter disk, when the disk identifying projections 37a and 37b are depressed by a large diameter disk simultaneously, the lock pins 38a, 38b are off from the lock grooves 42a, 42b, and the lock is released. Then, the stopper 31 is moved to a position where the large diameter disk is mounted on a turntable 23.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention 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.

[0002]

2. Description of the Related Art Conventionally, a compact disc having a relatively large diameter (12 cm in diameter) on which a large number of songs are recorded has been generally used. However, with the spread of CD players in recent years, the compact disc has a smaller diameter. A disc having a diameter of 8 cm and recording 2-3 songs, that is, a so-called CD single has spread, and development of a CD player capable of reproducing both the large-diameter disc and the small-diameter disc is required. Conventionally, when inserting and using a disk having a different shape from the same insertion opening, an adapter 1 as shown in FIG. 11 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 this adapter 1 from the insertion opening of the CD player, a disc (S) having a small diameter with respect to the outer circumference of the base disc 2 is used as a reference.
Can be securely clamped to the turntable.

[0003]

However, as in the prior art, a small-diameter disk is attached to the adapter 1, and C
When inserted from the insertion opening of the D player, a kerf portion 3a existing between the support arm 3 of the adapter and the base disk 2
(The groove for allowing the support arm 3 to elastically expand) may pass 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. 11, and when the adapter 1 falls under a seat or the like in the vehicle compartment, it has a small diameter. The disc playback operation itself becomes impossible.

The present invention is intended to solve the above problems,
To provide a disc player in which discs of different diameters can be reliably clamped to a turntable of a disc drive mechanism and ejected reliably even when different discs are introduced. There is.

[0005]

DISCLOSURE OF THE INVENTION According to the present invention, a disk drive mechanism capable of driving disks of different diameters, a transport mechanism for loading a disk into the disk drive mechanism, and a loaded small diameter disk on the disk drive mechanism. A stopper that moves between a restricting position for positioning and a position where a large-diameter disk can be installed in the disk drive mechanism, and a lock protrusion that fits in the lock groove when the stopper is in the restricting position to prevent movement of the stopper. , When the disc is carried in, the disc is not pushed by the small-diameter disc at the same time and is placed at a position pushed by the large-diameter disc at the same time, and the fitting between the lock projection and the lock groove is released only when pushed simultaneously. And a pair of disc identifying members that can move the stopper.

In the above means, the pair of locking protrusions may be connected to the disc identifying members so that when the individual disc identifying members are pushed by the disc, the locking protrusions integrated with the disc identifying members are disengaged from the lock groove. .

Further, it is preferable to provide a spring for urging each of the lock protrusions in the direction of fitting into the lock groove.

Further, in each of the above means, it is possible to movably support the stopper on a support member which supports the disk clamper in the disk drive mechanism, and to form the lock groove on this support member.

[0009]

In the first means, when the small-diameter disc is carried in by the transport mechanism, the disc identifying member is not pushed at the same time, so that the stopper is locked at the restricting position by the engagement of the lock protrusion and the lock groove. . The small-diameter disk is positioned on the disk drive mechanism by the stopper that is locked at this regulation position and is on standby. When the large-diameter disk is carried in, the large-diameter disk simultaneously presses the disk identification member, and at this time, the lock projection is disengaged from the lock groove, and the stopper can be moved. Then, the stopper is moved from the standby position, and the large-diameter disk can be installed in the disk drive mechanism.

In the above means, if a pair of lock protrusions are provided and connected to the disc identifying member, the individual lock protrusions will be disengaged from the lock groove when the disc identifying member is pushed. The lock protrusion and the disc identification member can be interlocked with each other depending on the number of parts.

Further, when the lock projection is biased to the lock groove by the spring, the stopper at the standby position can be reliably locked.

Further, the stopper is movably supported by the supporting member for supporting the disc clamper, and the lock groove is formed in this supporting member, so that it is not necessary to separately provide a member for supporting the stopper and forming the lock groove. The number of parts can be reduced.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
This will be described with reference to each drawing of (B). FIG. 1 is a front view showing an operation unit 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,
For example, an insertion port 12 into which a plurality of types of discs having different diameters such as a small-diameter disc (S) and a large-diameter disc (L) are inserted is provided. The operation panel 11 is attached to the front surface of the player body (H) so that each function of the player body (H) can be operated.

The player body (H) will be described in detail with reference to FIGS. 2 and 3 are plan views of the apparatus main body (H), and FIG. 5 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. The drive roller 14 has a gear 1 on the outside of the side chassis 15b.
6 is attached. As shown in FIG. 5, this gear 16 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 drives the drive roller 14 to rotate. It has become so.

The other side of the drive roller 14 is a plastic facing member 14a as shown in FIGS. 7 and 10A and 10B. The surface of the facing member 14a facing the drive roller 14 is a concave curved surface. This concave shape faces the change in the diameter of the drive roller 14 and has a curvature with the same rate of change as the change in the diameter of the drive roller 14. As shown in FIG. 7, the drive roller 14 is driven by a predetermined spring pressure during the disc pulling operation to face the opposing member 14a.
The disk is pinched by and, and after the disk is completely inserted, it escapes downward as shown by the dotted line. 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 disk pull-in operation by the drive roller 14 and the facing member 14a, when a large-diameter disk (L) is used, the large-diameter disk (L) is moved to the drive roller 14 as shown in FIG. 10 (A). It 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, the small-diameter disk (S) is driven by a thin portion on the center side of the drive roller 14, as shown in FIG. 10 (B). Therefore, the small-diameter disc (S) is sandwiched by the drive roller 14 and the opposing member 14a with a relatively weak force, and the small-diameter disc (S) is weaker than the driving force when driving the large-diameter disc (L). You will be pulled in by force. Further, a small-diameter disk (S) is inserted at a position offset from the center of the passage, and only one end of the disk (S) is driven by the drive roller 14.
In the case where the disk (S) is sandwiched and drawn in by the large-diameter portion, the balance of the driving force acting on the disk (S) is lost, so 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. Get burned.

2 and 3, reference numeral 20 indicates a disk drive unit. The disk drive unit 20 includes four dampers 19a and 19b for absorbing vibration, which are attached to both side chassis 15a and 15b.
(The other two do not appear in the figure). 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 FIGS. 4 and 6, the lower chassis 22 of the disk drive unit 20 includes a turntable 23 for rotating the disk (S) or (L).
In addition, an optical pickup mechanism 21 for reading a signal written on the small-diameter disc (S) or the large-diameter disc (L) is provided.

As shown in FIGS. 4 and 7, the lower chassis 22
An upper chassis 25 as a support member is provided at one end of the shaft 24
(Refer to FIG. 6) It is attached so as to be rotatable in the vertical direction with a fulcrum as a fulcrum, and the upper chassis 25 is a spring (not shown)
Is always pulled toward the lower chassis 22 by. A clamper 26 that clamps a disk (S) or (L) mounted on the turntable 23 is rotatably supported on the upper chassis 25.
A restricting piece 27 that restricts the descent of the clamper 26 onto the turntable 23 is integrally bent and formed on the side of 5. 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. Inclined portion 27
b are formed.

When the disc (S) or (L) is ejected, the release pin 28 for releasing the clamp slides on the inclined portion 27b, and when the release pin 28 enters under the standby portion 27a. The upper chassis 25 can be lifted. The release pin 28 is driven in the left-right direction in FIGS. 5, 6 and 7 by a rack mechanism or the like that meshes with any of various gears 18, 18 ... Provided on the side chassis 15b. . That is, the motor 17 shown in FIG. 5 drives the drive roller 14, but when the solenoid (SOL) shown in FIG. 5 is excited when the disc is supplied onto the turntable, the motor 17 is provided in the power transmission section. The engaged clutch is activated,
When the power to the drive roller 14 is cut off, the release pin 28 is driven rightward in the figure by the rack mechanism. On the contrary, at the end of the reproducing operation, the release pin 28 first moves to the left in the drawing, and then the driving roller 14
The power is transmitted to the disc so that the disc is ejected.

When the release pin 28 is located at the position shown by the solid line in FIGS. 6 and 7, the release pin 28 engages with the standby portion 27a of the restriction piece 27, whereby the upper chassis 25 is lifted and clamped. Is released. When the release pin 28 moves to the right as shown by the dotted line in FIGS. 6 and 7, the release pin 28 moves to the standby portion 27.
When the upper chassis 25 is disengaged from a, the upper chassis 25 is moved downward by the force of the spring, and the clamper 26 provided on the upper chassis 25 clamps the disc on the turntable 23.
When the release pin 28 is in the position shown by the solid line,
The drive unit 20 elastically supported by the dampers 19a and 19b is locked by a lock mechanism (not shown) so as not to be elastically supported. Conversely, release pin 2
When the disk 8 is moved to the position shown by the dotted line and the disk is in the reproducing operation, the lock is released and the drive unit 20 is elastically supported by the dampers 19a and 19b.

As shown in FIG. 4, a triangular slider 30 made of sheet metal is provided on the lower surface (the surface facing the lower chassis 22) of the upper chassis 25 serving as a supporting member, and this slider is also provided. A stopper 31 is attached to 30. As shown in FIGS. 2 and 8, 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.
It is also possible to integrally form the slider 30 and the stopper 31 with resin or the like. A pair of pins 32 and 33 are provided on the upper surface of the triangular slider 30. The pins 32 and 33 are inserted into a linear sliding hole 34 formed in the upper chassis 25, and the slider 30 can be linearly moved along the sliding hole 34.

A pair of lock release levers 35a and 35b are rotatably supported on the slider 30 by pins 36a and 36b, respectively. Each of the lock release levers 35a and 35b is formed in a dogleg shape. Downward disc identification protrusions 37a and 37b are attached to the ends of the long arms of the lock release levers 35a and 35b. These disc identification protrusions 37a and 37b
Is composed of rotating rollers. Alternatively, the disc identification protrusions 37a and 37b are composed of non-rotating members such as pins. Further, lock pins 38a and 38b are attached upward at the tips of short arms of the lock release levers 35a and 35b.

A pair of auxiliary holes 41a and 41b are formed in the upper chassis 25 with the sliding hole 34 interposed therebetween. The pair of auxiliary holes 41a and 41b linearly extend so as to be parallel to the sliding hole 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. Short arms of the pair of lock release levers 35a and 35b are connected by a spring 39. By the force of the spring 39, the lock release levers 35a and 35b are moved so that the pair of lock pins 38a and 38b come close to each other.
Is being urged. The biasing force of the spring 39 is set to be fairly weak.

As shown in FIG. 8, when the slider 30 is moving to the left in the figure, the pair of lock pins 38a and 38b attracted by the spring 39 lock the ends of the auxiliary holes 41a and 41b, respectively. Groove 42a
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. Further, when the slider 30 is locked in this way, a pair of disc identification protrusions 37a and 37b provided on the lock release levers 35a and 35b are provided.
Is located to the left of the arc-shaped stopper 31 in the figure. The center of the small diameter disc (S) is the turntable 2
When the center of 3 is almost aligned, the lock pin 38
With the a and 38b locked in the lock grooves 42a and 42b, the pair of disc identification 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 a stopper 31 whose edge (a) is arc-shaped.
Hit almost the center of the
Both parts of the portion come into contact with the disc identification protrusions 37a and 37b. The small-diameter disk (S) is positioned so as to reach the center of the turntable 23 at the above-mentioned three points (a), (b) and (c). The distance between the edge of the disc passage shown in FIG. 3 and each disc identification protrusion 37a and 37b is set to be smaller than the radius of the disc (S) having a small diameter.

When a large-diameter disc (L) is supplied, the radius of the edge of this disc (L) is small (S).
Since the radius of curvature of the concave surface of the stopper 31 is substantially the same as the radius of the disk (L), the edge (a) of the disk (L) hits the stopper 31. The disc identification projections 37a and 37b are simultaneously pushed in the right direction (passage depth direction) in the figure by the (d) portion and the (e) portion. As a result, the lock release levers 35a and 3
The pair of lock pins 38a and 38b are disengaged from the lock grooves 42a and 42b of the upper chassis 25 by rotating the pair of lock pins 38a and 38b in opposition to each other by the force of the spring 39. Therefore, the lock of the slider 30 is released, and the slider 30 can move to the right in the drawing. That is, when a large-diameter disk (L) is supplied, the slider 30 is unlocked,
The disc (L) causes the stopper 31 to be pushed inward.

An eject lever 45 is provided on the upper surface of the upper chassis 25. This eject lever 45
Are rotatably supported by support pins 46. An elongated hole 45a is formed at the tip of the eject lever 45, and a pin 33 provided on the slider 30 penetrates a sliding hole 34 formed on the upper chassis 25 to form an elongated hole of the eject lever 45. It is inserted in 45a. The linear movement along the sliding hole 34 of the slider 30 is
It is interlocked with the rotating operation of the eject lever 45.

Base arm 45b of eject lever 45
A reversing spring 47 is hung between the upper chassis 25 and the upper chassis 25. As shown in FIG. 8, when the slider 30 is moving in the direction of the insertion port, the ejecting 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 4
5 is urged in the clockwise direction, and the slider 30 is pressed in the right direction in the figure (direction behind the passage).

An intermediate 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. This intermediate lever 5
A drive pin 53 is provided at the tip of the arm of No. 1 and the drive pin 53 is provided with a notch 2 formed in the upper chassis 25.
5a (see FIG. 6) and projects upward. The drive pin 53 is inserted into the elongated hole 45c formed in the eject lever 45. Further, the intermediate lever 51 is formed with an operating piece 51 a, and the operating piece 51 a projects from the side edge of the upper chassis 25.

As shown in FIGS. 6 and 7, a drive lever 61 is provided inside the side surface of the lower chassis 22. The drive lever 61 has an elongated hole 61 a formed therein, and the support shaft 6 fixed to the inner surface of the lower chassis 22.
This elongated hole 61a is supported by 2. The drive lever 61 is movable in the left-right direction in FIG. 7 by this one support shaft 62, and can be rotated about this support shaft 62 as a fulcrum. However, a regulation pin 64 is fixed to the left end of the drive lever 61 in the drawing, and the regulation pin 64 is inserted into a regulation hole 65 formed in the lower chassis 22.

The drive lever 61 can rotate about the support shaft 62 as a fulcrum within a range in which the restriction pin 64 can move inside the restriction hole 65. A spring 66 is hung on the support shaft 62.
One end of 6 is hooked on the lower chassis 22, and the other end is hooked on the inner surface of the bent portion 61b on the right side of the drive lever 61. Due to the biasing force of this spring 66, the drive lever 6
1 is moving to the right in FIG. 7, and the drive lever 61 is rotated clockwise by the force of the spring 66. The regulation pin 64 is in pressure contact with the upper edge 65a of the regulation hole 65 by this rotational biasing force. A drive pin 67 is fixed to the upper right end of the drive lever 61 in the figure, and the drive pin 67 is located at a position where the drive pin 67 can hit the operating piece 51a of the intermediate lever 51 when the drive lever 61 moves in the left-right direction. It is extended. Also drive lever 6
A protrusion 61c is integrally formed on the upper edge of the center of the unit 1. The protrusion 61c is located in the moving area of the release pin 28.

As shown in FIG. 2, four detection points A, B, C and D are provided in the disc insertion passage. Each of the detection points A to D has a light emitting element and a light receiving element that face each other across the disc insertion passage. A diaphragm member that narrows the light to a constant diameter is provided. Of these detection points A to D, A
Is for disc insertion and ejection detection.
Is located inward of the disk and at the center of the disk insertion passage. B is arranged at a position where any disc is blocked when the center of the small disc (S) or the large disc (L) is on the turntable 23. C is arranged at a position away from the edge of the disc (L) when the center of the large-diameter disc (L) is on the turntable 23. The detection point C also has a function of detecting that a large-diameter disc (L) has been ejected. When the disc (L) moves to a position where it does not block the detection point C, the ejection operation is performed. To be completed. Further, D is for detecting this pushing operation by blocking by the disc (S) when the small-diameter disc (S) ejected to the position shown on the left side in the drawing is pushed again. It is a thing.

Next, a disc loading operation in the disc player of the above embodiment will be described. When the disc is not being played, the release pin 28 is moved to the left side of the figure as shown by the solid line in FIG. The release pin 28 is formed on the upper chassis 25 by the restriction piece 27.
The upper chassis 25 is abutted against the stand-by portion 27a and the upper chassis 25 is lifted via the restriction piece 27, whereby the clamper 26 is separated from the turntable 23.

The eject lever 45 provided on the upper surface of the upper chassis 25 is rotated counterclockwise by the reversing spring 47, and the slider 30 connected to the eject lever 45 and the pin 33.
Are extruded toward the insertion opening 12. Then, the pair of lock release levers 35a and 35b are attracted to each other by the spring 39, and the lock pins 38a and 38b.
Are auxiliary holes 41a and 41b formed in the upper chassis 25.
The slider 30 is locked by being fitted into the lock grooves 42a and 42b at the end of the slider. In addition, the pair of disc identification protrusions 37a and 37b are formed in the insertion opening 12 rather than the stopper 31.
It is located to the side. When the small-diameter disk (S) is inserted, it is pinched by the drive roller 14 and the opposing member 14a and drawn. As shown in FIG. 2, when a small-diameter disk (S) is inserted from approximately the center of the insertion slot 12, the disk (S) is shown in FIG. 10 (A) by the drive roller 14 and the facing member 14a. In the state shown (the small diameter portion of the drive roller 14), it is sandwiched and fed. Due to the concave shape of the driving roller 14 and the facing member 14a, the disc (S) is fed through the center of the insertion passage.

As shown in FIGS. 2 and 8, the small-diameter disk (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. Comes into contact with the disc identification protrusions 37a and 37b. That is, both the disc identification protrusions 37a and 37b 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 simultaneously locked by the lock grooves 42a and 42b.
It does not come off. Therefore, in this case, the slider 3
0 remains locked and does not move to the right in FIGS. 2 and 8. 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
As shown in FIG. 3, the disk (S) is the side chassis 1
It may be inserted in a state in which it is offset to the 5a side. Even in such a case, the disc (S) can be guided to the central position of the passage. This is because the driving roller 14 and the facing member 14a have a concave shape at the center as shown in FIG. 10A, so that one side edge of the small-diameter disk (S) becomes the large-diameter portion of the driving roller 14. This is because, when sandwiched, the shaft of the drive roller 14 is tilted and the balance of the feeding force is lost, and a force to return the disc (S) to the center is exerted during the feeding operation.

Further, the distance between the disc identification protrusion 37a, which firstly hits the edge of the disc (S), and the end of the passage is smaller than the radius of the disc (S) having a small diameter. Therefore, when this disc is drawn along the path shown in FIG. 3 and hits the identification protrusion 37a, the (a) portion of the disc (S) has the stopper 31 as a fulcrum.
The disk center is guided so as to hit the turntable 23. At this time, the edge portion of the disc (S) has the disc identification protrusion 37a.
Is pushed rightward in the figure, and the lock release lever 35a provided with the disc identification protrusion 37a is rotated clockwise by this force, and the lock pin 38a is disengaged from the lock groove 42a of the upper chassis 25. However, the lock pin 38b provided on the other lock release lever 35b does not come out of the lock groove 42b, so that the slider 30 remains locked and the stopper 31 is not pushed in the depth direction of the passage. The same applies when a small-diameter disk (S) is fed to the side opposite to the one shown in FIG.

The center of the disk (S) is the turntable 2
3 is detected by the detection operation described later, the solenoid (SOL) is excited, the motor power to the drive roller 14 is cut off, and the release pin 28 is released by the drive force of the motor 17. 7 is driven to the right from the position indicated by the solid line to the position indicated by the dotted line. Therefore, the release pin 28 separates from the regulation piece 27, the upper chassis 25 lifted by the release pin 28 descends by the force of the spring, and the clamper 26 and the turntable 23 cause the disc (S) to move.
Is clamped. The drive roller 14 is interlocked with this operation.
Falls to the position shown by the dotted line in FIG.

Next, the large-diameter disk (L) is inserted into the insertion port 12
When it is inserted from the disk and fed by the drive lever 14 (see FIG. 10 (A)), as shown in FIG. Hits 37a and 37b. Further, since the stopper 31 has a concave shape substantially along the outer circumference of the disk (L), the disk (L) hits almost the entire surface of the stopper 31,
Therefore, both identification protrusions 37a and 37b are pushed toward the stopper 31 almost at the same time. Therefore, this identification protrusion 37a
And lock release lever 3 provided with 37b
5a and 35b rotate in the direction of opening each other against the spring 39, and lock pins 38 provided on each of them.
a and 38b almost at the same time as the lock groove 42 of the upper chassis 25.
The slider 30 is released from a and 42b, and the lock of the slider 30 is released.

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 depth direction of the passage. When it moves a certain distance (for example, about 2/3 stroke), the eject lever 45 that rotates together with the slider 30 causes the reversing spring 4 to move.
7, the slider 30 and the stopper 31 are automatically moved in the depth direction of the passage. With the stopper 31 moved in the passage depth direction, the center of the disk (L) is located on the turntable 23. Large diameter disc (L)
When it is detected that the disc has been loaded, the small-diameter disc (S)
7, the release pin 28 moves from the position indicated by the solid line to the position indicated by the dotted line in FIG.
And the turntable 23. Further, the drive roller 14 descends to the position shown by the dotted line in FIG.

Next, the operation of ejecting each disk will be described. As described above, when it is detected that the disc (S) or the disc (L) is supplied to the regular position, the release pin 28 moves rightward from the position indicated by the solid line to the position indicated by the dotted line in FIG. Leading to. The drive lever 61 provided on the inner side surface of the lower chassis 22 includes a spring 66.
Is moved to the right in the figure by the force of, and is also urged clockwise by the same spring 66 with the support shaft 62 as a fulcrum. When the release pin 28 moves to the right in the drawing, it rides on the protrusion 61c of the drive lever 61, and the drive lever 61 rotates counterclockwise within the range in which the restriction pin 64 can move within the restriction hole 65. That is, when the release pin 28 moves to the right, the position of the drive lever 61 remains the same, and once the projection 61c escapes downward and the release pin 28 finishes passing, the drive lever 61 is released.
Is returned clockwise by the force of the spring 66.

In the disc removing operation, the release pin 28 moves leftward from the position indicated by the dotted line in FIG. 7 to reach the position indicated by the solid line.
At this time, the release pin 28 is locked by the protrusion 61c, the protrusion 61c is pulled by the release pin 28, and the drive lever 61 is moved leftward in the drawing. This leftward movement causes the restriction pin 64 to move from the upper edge 65a of the restriction hole 65 to the hypotenuse 65.
The drive lever 61 is rotated counterclockwise by the hypotenuse 65b (the state indicated by the alternate long and short dash line in FIG. 7). Therefore, the protrusion 61c comes off from the release pin 28, and the drive lever 61
Is returned to the right in the figure by the spring 66. That is, in the removing operation, the drive lever 61 is once moved to the left in the figure and then returned to the right. In this operation, the drive pin 67 provided on the upper end of the drive lever 61 moves from the position shown by the solid line to the position shown by the dotted line in FIG.

Here, in the loading operation of the small-diameter disk (S), the slider 30 remains in the state of FIG. 8 and does not move. That is, the eject lever 45 moves the reverse spring 4
It is kept in a state of being rotated counterclockwise by the force of 7. Further, the intermediate lever 51 connected to the eject lever 45 remains rotated in the clockwise direction. Therefore, FIG.
As shown in, the operating piece 51 a of the intermediate lever 51 is separated from the drive pin 67. Therefore, the drive pin 67 that moves together with the movement of the drive lever 61 during the above-described ejection does not hit the operating piece 51a.

On the other hand, when the large-diameter disk (L) is loaded, the stopper 31 is moving in the backward direction as shown in FIG. 9, and the eject lever 45 is rotated clockwise by the reversing spring 47. Have been moved.
Therefore, the intermediate lever 51 connected to the eject lever 45 is rotated in the counterclockwise direction and the operating piece 51a is rotated.
Is moving greatly to the right. Therefore, in the operation of removing the large-diameter disk (L), the drive pin 67 presses the actuation piece 51a by the leftward movement of the drive lever 61, and the intermediate lever 51 is driven in the clockwise direction. 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. Also release pin 28
7 moves to the left side of the drawing, the lifting piece 27 is lifted by this, the upper chassis 25 rotates upward, and the disk clamp by the clamper 26 is released. The drive roller 1 shown by the dotted line in FIG.
4 rises, the disc is held between the roller 14 and the facing member 14a, and the disc is ejected toward the insertion port 12 by the reverse rotation of the drive roller 14.

Next, detection and identification of the inserted disc will be described. As shown in FIGS. 2 and 3, optical detection points A to D are provided in the disc insertion passage. In the following explanation, the detection point is ON when the disc blocks light,
The case where the disk does not block light will be described as OFF. First, when the small-diameter disk (S) or the large-diameter disk (L) is inserted from the insertion opening 12 while the motor of the drive roller 14 is stopped, the detection point A is turned on by the tip of each disk. Then, the motor is started, the drive roller 14 is rotated, and the disk is pulled in.

Next, it is discriminated whether the disc is a small-diameter disc (S) or a large-diameter disc (L) and whether or not the center of these discs is directly above the turntable as follows. When the center of the large-diameter disk (L) is installed on the turntable 23, the detection point B
And the detection point A is ON, and the detection point C is OF
It is F. While the large-diameter disk (L) is being pulled in, all the detection points A, B, and C may be turned on. In this case, the detection point C is turned off.
When it becomes, loading is completed. When the center of the small-diameter disk (S) is installed on the turntable 23, the detection point B is ON and the detection points C and A are
Then it is OFF. The detection points A and B are arranged at positions that cannot be turned on at the same time by the small-diameter disk (S). Therefore, for example, when only the detection point A is ON depending on the position where the small-diameter disk (S) is pulled in,
Although detection points A and C may be turned on at the same time,
Disk (S) progresses and only detection point B turns on
When it becomes, you can confirm the loading to the regular position. That is, it is possible to discriminate between the small-diameter disk (S) and the large-diameter disk (L) depending on whether or not the detection points A and B are turned on at the same time.

With the arrangement of the above-mentioned respective detection points, the disc loading detection and the identification detection can be carried out by the flow chart shown in FIG. 12, for example. First, when the detection point A is turned on while the motor driving the drive roller 14 is off, a start command is issued to the motor to rotate the drive roller 14 in the feed direction. After that, when the detection point A remains ON and the detection point C turns ON, or in addition to this, the detection point B turns ON, or only the detection point A remains ON. However, as control, it waits for the detection point B to be turned on, and when B is turned on, the identification and confirmation operation of whether or not the loading operation is completed is started. That is, when the detection point B is turned on, the detection points A and C are checked, and if both are turned off, the loading of the small-diameter disk (S) is completed.
Therefore, the solenoid (SOL) is excited to drive the drive roller 14
The roller that is driving is stopped, and the clamp operation described above is started. When the detection point B is turned on,
If both detection points A and C are ON, the large-diameter disk (L) is in the process of being pulled in. Therefore, if it is confirmed that B is ON and C is OFF, the loading of the large-diameter disk (L) is completed. Therefore, the drive roller 14 is stopped and the clamp operation is started.

Next, the ejection control of the disc is performed as follows. In the case of a large-diameter disk (L), the clamp is released by the eject operation and the motor 17
The drive roller 14 is rotated in the reverse direction to eject the disc (L). And the detection point C which was OFF until then
The motor is stopped when is turned on and then turned off. At this time, as shown on the left side of FIG. 2, the rear end of the disc (L) is positioned on the drive roller 14 and the disc (L) is projected from the insertion port 12. Next, in the ejecting operation of the small-diameter disk (S), after the clamp is released by the ejecting operation, the motor 17 is driven for a fixed time. The small-diameter disc (S) stops at a position separated from the drive roller 14, and the small-diameter disc (S)
The leading end of the protrusion protrudes from the insertion opening 12 and stops. When the ejected disc is pushed in again, the detection point C turns on again when the disc (L) has a large diameter.
If the disc (S) has a small diameter, the detection point D is turned on. Based on this confirmation, the drive roller 14 may be driven again to push the disc toward the insertion slot 12, or the drive roller 14 may pull the disc again to put it in a standby state for another reproducing operation.

As described above, whichever of the discs (S) and (L) is used, the discs (S) and (L) can be stopped on the turntable 23 at the same position, and the operation thereafter is performed. The same can be done with any of the disks (S) and (L). Therefore, it is possible to reproduce any of the discs (S) and (L) without significantly changing the disc player used conventionally. Also, especially for small-diameter discs (S), the insertion slot 1
Since it is okay to insert the disc from a position deviated from the center of 2, the loading operation can be easily performed in the vehicle-mounted disc player even when the driver inserts the disc. In the illustrated embodiment, the stopper 31 has a curved shape along the outer circumference of the large-diameter disk (L), but the stopper 31 may be a flat plate positioned behind the disk identification protrusions 37a and 37b. Alternatively, it may be a plurality of protrusions arranged at positions along the curved curved surface of the embodiment shown in the figure.

[0048]

According to the first aspect of the invention, the small-diameter disk is positioned by the stopper locked by the fitting of the lock projection and the lock groove, and the large-diameter disk can be driven by releasing the lock. Become. Therefore, it becomes possible to carry in discs having different diameters by the transport mechanism and drive them as they are.

According to the second aspect of the present invention, when the disc identification member is pushed, the lock projection integral with the disc identification member can be reliably disengaged from the lock groove, and the lock projection and the disc identification member can be separated with a minimum number of parts. Can be interlocked.

According to the third aspect of the present invention, the stopper located at the standby position is reliably locked by urging the lock projection toward the lock groove by the spring.

According to the fourth aspect of the present invention, the stopper is movably supported by the support member having the disk clamper, and the lock groove is formed in the support member.
It is not necessary to separately provide a member other than the conventional supporting member, and the structure does not become complicated.

[Brief description of drawings]

FIG. 1 is a front view showing an operating portion of a disc player according to an embodiment of the present invention,

FIG. 2 is a plan view of the disc player main body,

FIG. 3 is a plan view of the disc player body for explaining a state in which a small-diameter disc is inserted,

FIG. 4 is an exploded perspective view of a disk drive unit,

FIG. 5 is a side view of FIGS. 2 and 3;

FIG. 6 is a partial plan view of a disk drive unit showing a structure of a return member,

FIG. 7 is a side view of FIG.

FIG. 8 is a partial plan view of a disk drive unit showing operations of a stopper and an unlocking mechanism,

FIG. 9 is a partial plan view of a disk drive unit showing operations of a stopper and an unlocking mechanism,

10A and 10B are front views showing a driving roller and a facing member,

FIG. 11 is a plan view showing a conventional small-diameter disk adapter,

FIG. 12 is an explanatory diagram showing a control flowchart of the detection unit in the embodiment of the present invention,

[Explanation of symbols]

 S small diameter disc, L large diameter disc, 12 insertion slot, 14 drive roller, 23 turntable, 25 upper chassis (supporting member), 26 clamper, 28 clamp release pin, 30 slider, 31 stopper, 35a, 35b unlocking Lever, 37a, 37b Disc identification protrusion, 38a, 38b Lock pin (lock protrusion), 42a, 42b Lock groove, 45 Eject lever, 47 Reversing spring, 51 Intermediate lever, 61 Drive lever, 67 Drive pin,

Claims (4)

[Claims] 1. A disc drive mechanism capable of driving discs of different diameters, a transport mechanism for loading the discs into the disc drive mechanism, a regulation position for positioning the loaded small-diameter discs on the disc drive mechanism, and a large-diameter disc. To move to a position where it can be installed in the disk drive mechanism, a lock projection that fits in the lock groove to prevent the stopper from moving when the stopper is in the regulation position, and a disk when the disk is loaded. A pair of members arranged at positions simultaneously pushed by the large-diameter disc without being pushed by the small-diameter disc, and disengaged from the lock projection and the lock groove only when pushed simultaneously so that the stopper can be moved. A disc player provided with a disc identification member. 2. A pair of lock protrusions are provided, and each lock protrusion is connected to a disc identification member, and when each disc identification member is pushed by the disc, the lock protrusion integral with the disc identification member is disengaged from the lock groove. The disc player according to claim 1. 3. The disc player according to claim 2, further comprising a spring for urging each lock protrusion in a direction in which the lock protrusion is fitted into the lock groove. 4. The stopper according to claim 1, wherein the stopper is movably supported by a support member that supports a disk clamper in the disk drive mechanism, and the lock groove is formed in the support member. Disc player.