JPH0242675A - Disk player - Google Patents

Abstract

PURPOSE:To stably mount a disk by locking a stopper in its abutting position against a small diameter disk and unlocking the stopper when a large diameter disk is forwarded. CONSTITUTION:When the small diameter disk S is inserted from an insertion hole 12, the small diameter disk S is advanced into the inner part of the insertion hole 12 by a driving force of driving roller, and on the way, a peripheral part of the disk comes into contact with the stopper 31. Since the stopper 31 is locked in this position, the small diameter disk S is securely mounted on a disk driving mechanism to be clamped by abutting this stopper. Then, the large diameter disk L is inserted, so that the stopper 31 is pushed by a peripheral part of the large diameter disk L to be moved backward in the interior direction of a passage. By this method, the large diameter disk is not influenced by the stopper, but situated in a prescribed position, and hence it can be clamped in a position to be driven by the disk driving mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a disc player such as a compact disc player or a video disc player, and particularly relates to a disc player that can play discs of different diameters with the same disc player. Regarding.

[Conventional technology]

In the past, compact discs were generally relatively large (12 cm in diameter) on which many songs were recorded.
With the spread of CD players in recent years, so-called CD singles, which are discs with a smaller diameter (8 cm in diameter) and on which two or three songs are recorded, have become popular, and both the large-diameter disc and the small-diameter disc have become popular. C that can play discs
There is a demand for the development of a D player.

Conventionally, when disks of different shapes are inserted into the same insertion slot, an adapter 1 as shown in FIG. 10 has been used. This adapter 1 has a base disk 2 formed to have the same diameter as a large disk, and has support arms 3 at several locations that are elastic and can be expanded. The small diameter disc (S,) is clamped in the central part of the adapter by a clamping projection 4 provided on the support arm 3.

By inserting this adapter 1 through the insertion opening of a CD player, a small-diameter disc (S) can be reliably clamped to the turntable with the outer periphery of the base disc 2 as a reference.

[Problem to be solved by the invention]

However, when a small-diameter disk is attached to the adapter 1 and inserted into the CD player's insertion slot as in the conventional case, the kerf portion 3a (support arm 3 During the loading of the disc, the groove (which allows the disc to expand elastically) may pass over the optical detection means for detecting disc insertion. In this case, the detection means will make a false detection, and the disk loading operation will stop midway, causing problems such as the disk not being able to be loaded in a predetermined position or being unable to be ejected.

In addition, general users think that they can use small-diameter discs as they are, but when a small-diameter disc is inserted into the insertion slot, the disc cannot be ejected and the CD player itself becomes unusable.

Furthermore, in the case of a car-mounted CD player, using the adapter 1 shown in Figure 1O is very complicated, and if the adapter 1 falls under the seat in the car, it is difficult to use the adapter 1 with a small diameter. The playback operation of the disc becomes impossible.

The present invention solves the above problems, and even when discs with different diameters are inserted from the same insertion port,
It is an object of the present invention to provide a disc player that can reliably clamp discs of different diameters to a turntable of a disc drive mechanism and reliably eject them.

[Means to solve the problem]

A disc player according to the present invention is a disc player that is provided with an insertion opening into which discs of different diameters are inserted, and a disc drive mechanism located at the back of the insertion opening, and in which a disc drive mechanism for small-diameter discs is installed in the disc insertion passage. is in the position where it hits this disk when it is inserted into the disk drive mechanism, and when a large-diameter disk is inserted into the disk drive mechanism, it moves along with this disk to the back of the disk insertion path 8! A stopper is provided that is locked at a position where it hits the small diameter disc, and is provided with an unlocking member that unlocks the stopper when a large diameter disc is inserted. .

Further, in the above means, a pair of disc regulating protrusions are provided at positions sandwiching the center of the disc insertion passage, and when a small diameter disc is on the disc drive mechanism, the pair of disc regulating protrusions are inserted more than the stopper. It is provided at a position that protrudes toward the mouth side and touches the edge of a small-diameter disk, and at a position that when a large-diameter disk is inserted, it is pushed by this disk and retreats toward the stopper, and the pair of disk regulating protrusions meet the stopper. When the vehicle moves backward in the direction shown in FIG.

Further, it is desirable that the stopper has a shape such that the side facing the disk follows the outer diameter of the large-diameter disk.

Furthermore, in each of the above means, a reversing spring is provided which biases the stopper toward the insertion port and whose bias direction is directed toward the back of the disk passage when the stopper moves toward the back with the large-diameter disk. It is also possible to provide a return member that pushes the stopper toward the insertion port against the biasing force of the reversing spring during the removal operation of a large-diameter disk.

[For production]

The above technical means works as follows.

When a small-diameter disk is inserted into the insertion port, the small-diameter disk enters the deep part of the insertion port due to the driving force of the drive roller, and the edge of the disk comes into contact with a stopper along the way. Since the stopper is locked in this position, the small diameter disk is securely seated and clamped on the disk drive mechanism by hitting the stopper. Furthermore, when a large-diameter disk is inserted and moves to the back of the insertion slot by the driving force of a drive roller, the stopper is unlocked, and the stopper is pushed by the edge of the large-diameter disk to the back of the passage. retreat in the direction. Therefore, the large-diameter disc is not affected by the stopper and is positioned at a predetermined position, allowing the disc to drive! It is clamped in position where it can be driven by the I3 mechanism.

Furthermore, if a pair of disc regulating protrusions are provided that are located closer to the insertion port than the stopper, and the stopper is unlocked when both of the pair of disc regulating protrusions are pushed by a large-diameter disc, it is possible to The stopper is unlocked and the stopper is moved toward the back of the passage only by inserting the disk of the same diameter.

In addition, if the stopper can be driven both toward the back of the path and toward the disk removal direction by the force of the reversing spring, even if the stroke of the drive source for the eject operation is small, the stopper can be moved during the ejection operation of a large diameter disk. can be reliably moved toward the insertion port.

(Example) Hereinafter, an example of the present invention will be described using FIGS. 1 to 9B.

FIG. 1 is a front view showing the operation section of the disc player. In this figure, 11 is an operation panel. Into the operation panel 11 are inserted a display 13 consisting of a liquid crystal display element etc. that displays various displays, and a plurality of types of disks with different diameters, such as a small diameter disk (S) and a large diameter disk (L). An insertion port 12 is provided. This operation panel 11 is attached to the front of the player main body (H), and is configured to operate each function of the player main body (H).

The player body (H) will be explained in detail using the drawings from FIG. 2 onwards.

Figures 2 and 3 are plan views of the device main body (H);
The figure is a side view thereof.

In FIGS. 2 and 3, reference numeral 14 denotes a drive roller whose diameter gradually increases toward both ends so as not to pinch the center of the large-diameter disk (L). One end of this drive roller 14 is pivotally supported by one side chassis 15a, and the other end is pivotally supported by a side chassis 15b. A gear 16 is attached to the drive roller 14 on the outside of the side chassis 15b. This gear 16 is the fifth
As shown in the figure, it meshes with various gears 18, 18, etc. that transmit the rotational force of the motor 17 provided on the side chassis 15b, so that the drive roller 14 is rotationally driven by the rotational force of the motor 17. It has become.

The other side of the driving roller 14 is a plastic facing member 14 as shown in FIG. 7 and FIGS. 9A and 9B.
It is a. The surface of this 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
The curvature has the same rate of change as the diameter of. As shown in FIG. 7, the drive roller 14 pinches the disk with the opposing member 14a with a predetermined spring pressure during the disk retraction operation, and after the disk is completely inserted, it moves downward as shown by the dotted line. It's like running away. Note that the opposing member 14a does not rotate, and the disk fed by the drive roller 14 simply slides thereon. However, as this opposing member 14a, it is also possible to use a freely rotatable roller having a shape that gradually becomes thicker at both ends in the same way as the drive roller 14. Drive roller 14 and opposing member 1
4a, when a large-diameter disk (L) is used, the large-diameter disk (L) can be driven at the thickest position of the drive roller 14, as shown in FIG. 9A. . Therefore, the drive roller 14
The large-diameter disk (L) can be strongly clamped by the squeezing force of the spring pressure between the disk and the opposing member 14a, and the disk is drawn in by a stronger driving force. Further, when a small diameter disk (S) is used, as shown in FIG. 9B, the small diameter disk (S) is driven by a narrow central portion of the drive roller 14. Therefore, the small diameter disk (S) is held between the drive roller 14 and the opposing member 14a with a relatively weak force, and the small diameter disk (S) is weaker than the driving force when driving the large diameter disk (L). You will be drawn in by force.

Furthermore, when 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 held between the large-diameter portion of the drive roller 14 and pulled in,
Since the balance of the driving force acting on the disk (S) is disrupted, the disk (S) is fed into the drive roller 14.
is guided to the central position of the path, that is, the central position of the passage.

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

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), and a small-diameter disk (S) or a large-diameter disk. (L) is equipped with an optical pickup mechanism 21 for reading signals written in the field. As shown in FIGS. 4 and 7, an upper chassis 25 is attached to one end of the lower chassis 22 so as to be able to rotate vertically about a shaft 24 (see FIG. 6). 25 is always pulled toward the lower chassis 22 by a spring (not shown). A clamper 26 for clamping the disc (S) or (L) mounted on the turntable 23 is rotatably supported on the upper chassis 25, and a clamper 26 is mounted on the side of the upper chassis 25 to clamp the disc (S) or (L) mounted on the turntable 23. A regulating piece 27 for regulating the lowering of the member 23 is integrally formed by bending. This regulation piece 27 has a disk (S) or (L).
upper chassis 2 until it is supplied onto the turntable 23.
5 is tilted upward and on standby.
a and this special part 27a&:adjacent inclined part 27b are formed. The disk (
When discharging S) or (L), a release bin 28 for releasing the clamp slides, and when the release bin 28 enters under the special equipment section 27a, the upper chassis 25 is lifted. The release bin 28 is driven in the left-right direction in FIGS. 5, 6, and 7 by a rack mechanism that meshes with one of various gears 18, 18, etc. provided on the side chassis 15b. This is how it is. That is, the motor 17 shown in FIG. 5 drives the drive roller 14, but when the disc is fed onto the turntable, the solenoid (S) shown in FIG.
QL) is excited, the clutch provided in the power transmission section is activated, the power to the drive roller 14 is cut off, and the release bin 28 is driven to the right in the figure by the rack mechanism. Become. Conversely, at the end of the playback operation, the release bin 28 first moves eight times to the left in the figure, and then power is transmitted to the drive roller 14 and the disc is ejected.

The release pin 28 is located at the position shown by the solid line in Figures 6 and 7.
When the release pin 28 is located, the release pin 28
7, and thereby the upper chassis 2
5 is lifted and the clamp is released. Further, when the release pin 28 moves to the right as shown by the dotted line in FIGS. 6 and 7, the release pin 28 is removed from the special equipment section 27a, and the upper chassis 25 is moved downward by the force of the spring, causing the upper chassis 25 to move upward. The disc is clamped to the turntable 23 by a clamper 26 provided on the chassis 25. When the release pin 28 is in the position shown by the solid line, the drive unit 20, which is elastically supported by the dampers 19a and 19b, is locked by a locking mechanism (not shown) so that it is not elastically supported. Conversely, when the release pin 28 moves to the position shown by the dotted line and the disc is ready for playback, 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 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 curved with a radius of curvature that is the same as or slightly larger than the radius of the large-diameter disk (L). . The stopper 31 is formed of resin or the like and is curved at the above-mentioned curvature, and its concave curved surface side is directed toward the turntable 23 .

Note that it is also possible to integrally mold the slider 30 and the stopper 31 with resin or the like. A pair of pins 32 and 33 are provided on the top surface of the triangular slider 30. Both bottles 32 and 33 are inserted into a linear sliding hole 34 formed in the upper chassis 25, so that the slider 30 can move linearly along this 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 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 disk regulating protrusions 37a and 37b are constituted by rotating rollers. Alternatively, the disk regulating protrusions 37a and 37b are formed of non-rotating members such as pins. Also, lock bins 38a and 38 are attached to the tips of the short arms of each lock release lever 35a and 35b.
b is attached facing upward. A pair of auxiliary holes 41a and 41b are bored in the upper chassis 25 with the sliding hole 34 in between. The pair of auxiliary holes 41a and 41b extend linearly parallel to the sliding hole 34, and the lock bins 38a and 38b are inserted into the auxiliary holes 41a and 41b. Lock grooves 42a and 42b are integrally formed at the end of each of the auxiliary holes 41a and 41b on the turntable side. The lock grooves 42a and 42b are formed in a direction in which they approach each other. The short arms of the pair of lock release levers 35a and 35b are connected by a spring 39. The force of this spring 39 urges each lock release lever 35a and 35b so that the pair of lock pins 38a and 38b approach each other. This spring 3
The urging force of 9 is set to be quite weak.

As shown in FIG. 8A, when the slider 30 is moving to the left in the figure, the pair of lock pins 38 and 38b, which are attracted by the spring 39, are inserted into 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 be moved to the right in the figure, that is, to the back of the passage. Further, when the slider 30 is locked in this manner, the pair of disc regulating protrusions 37a and 37b provided on the lock release levers 35a and 35b are located on the left side of the arc-shaped stopper 31 in the figure. When the center of the small diameter disc (S) substantially coincides with the center of the turntable 23, the lock pins 38a and 38b are locked in the lock grooves 42a and 42b, and the pair of disc regulating protrusions 37a and 37b are aligned with the small diameter disc (S). disk (
comes into contact with the edge of S). That is, the edge (A) of the small-diameter disk (S) fed onto the turntable 23 hits approximately the center of the arc-shaped stopper 31, and then the edge (B) and (H) ) portion comes into contact with each disk regulating protrusion 37a and 37b. The small-diameter disk (S) is positioned so as to reach the center of the turntable 23 at the three points (A), (B), and (C) above. Further, the distance l between the edge of the disk passage and each of the disk regulating protrusions 37a and 37b shown in FIG. 3 is set to be smaller than the radius of the small diameter disk (S).

When a large diameter disk (L) is supplied, this disk (
Since the radius of the edge of the disk (L) is larger than the radius of the small-diameter disk (S), and the curvature of the concave surface of the stopper 31 almost matches the radius of the disk (L), the disk (
When the edge (A) of L) hits the stopper 31, the edge (
The disk regulating protrusions 37a and 37b are pushed to the right in the figure (towards the back of the passage) by portions (d) and (e). As a result, the lock release levers 35a and 35b are moved by the spring 39.
The pair of lock pins 38a and 38b are rotated to open each other against the force of the lock groove 42a of the upper chassis 25.
.

It comes off from 42b. Therefore, the lock of the slider 30 is released, and the slider 30 can now 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 is connected to the support pin 4
It is rotatably supported by 6. An elongated length 45a is formed at the tip of the eject lever 45, and the pin 33 provided on the slider 30 is connected to the upper chassis 25.
The eject lever 45 is inserted into the long hole 45a of the eject lever 45. The linear movement of the slider 30 along the sliding hole 34 is linked to 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 port, the eject lever 45 is biased counterclockwise by the reversing spring 47, and the slider 30 is pushed toward the left in the figure. When the slider 30 is unlocked and moves about 2/3 stroke to the right in the figure, the biasing direction of the reversing spring 47 is reversed, and the eject lever 45 is biased clockwise. 30 is pushed toward the right in the figure (towards the back of the passage).

An intermediate lever 51 is provided on the lower surface of the end 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 end of the intermediate lever 51.
3 passes through a notch 25a (see FIG. 6) formed in the upper chassis 25 and projects upward. The drive pin 53 is inserted into a long hole 45c formed in the eject lever 45. Further, the intermediate lever 51 is formed with an actuating piece 51a, and this actuating piece 51a protrudes 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. As shown in FIGS. A long hole 61a is formed in this drive lever 61, and this long hole 81a is supported by a support shaft 62 fixed to the inner surface of the lower chassis 22.
is supported. The drive lever 61 is movable in the left-right direction in FIG. 7 by this single support shaft 62, and can also be rotated about this support shaft 62 as a fulcrum. However, a regulation bin 64 is fixed to the left end of the drive lever 61 in the drawing, and this regulation bin 64 is inserted into a regulation hole 65 formed in the lower chassis 22. The regulation bottle 64 is 8 inside the regulation hole 65! The drive lever 61 is designed to be able to rotate about the support shaft 62 as far as possible. Further, a spring 66 is hung on the support shaft 62, and this spring 66
One end is hooked to the lower chassis 22, and the other end is hooked to the inner surface of the bent portion 61b on the right side of the drive lever 61. Due to the biasing force of the spring 66, the drive lever 61
is moving to the right in FIG. 7, and the force of this spring 66 causes the drive lever 61 to rotate clockwise. Due to this rotation biasing force, the regulation pin 64 is pressed against the upper IQ 65a of the regulation hole 65. A drive pin 67 is fixed to the upper right end of the drive lever 61 in the figure, and this drive pin 67 engages the operating piece 51 of the intermediate lever 51 when the drive lever 61 moves in the left-right direction.
It extends to a position where it can hit b.

Further, a protrusion 61c is integrally formed on the upper edge of the drive lever 61 at approximately the center thereof. This protrusion 61c is located within the eight movement range of the release pin 28.

As shown in Figure 2, there are A and B in the disk insertion path.
Detection points located at four locations indicated by , C, and D are provided. Each of the detection points A to D has a light emitting element and a light receiving element facing each other across the disk insertion path. A diaphragm member is provided to narrow the light to a constant diameter. Of these detection points A to D, point A is for detecting disk insertion and ejection, and is located inside the insertion slot 12 and at the center of the disk insertion path. B is arranged at a position where when the center of the small-diameter disk (S) or the large-diameter disk (L) is above the turntable 23, either disk is blocked. In C, the center of the large diameter disc (L) is turntable 2.
It is located at a position that is off the edge of the disk (L) when it is on top of the disk (L). Detection point C also has a function to detect when a large diameter disk (L) is ejected, and when this disk (L) moves to a position where it does not block detection point C, the ejection operation starts. be completed. In addition, when the small diameter disk (S) ejected to the position shown on the left side in the figure is pushed in again, D is blocked by this disk (C).
This is for detecting this pushing motion.

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

When the disc is not being played, the release pin 28 is moved to the left in FIG. 7, as shown by the solid line. The release pin 28 then comes into contact with the special part 27a of the regulating piece 27 formed on the upper chassis 25, and the upper chassis 25 is lifted up via the regulating piece 27, whereby the clamper 26 is separated from the turntable 23. ing.

Further, the eject lever 45 provided on the upper surface of the upper chassis 25 is rotated counterclockwise by a reversing spring 47, and the slider 30 connected to the eject lever 45 by a pin 33 is connected to the insertion port 12.
is being pushed in the direction of The pair of lock release levers 35a and 35b are drawn together by the spring 39, and the lock pins 38a and 38b are fitted into the lock grooves 42a and 42b at the ends of the auxiliary holes 41a and 41b formed in the upper chassis 25. , the slider 30 is locked. In addition, a pair of disc regulating protrusions 37a and 3
7b is positioned further toward the insertion port 12 than the stopper 31.

When the small diameter disk (S) is inserted, the drive roller 14
and the facing member 14a and are pulled in by being squeezed.

As shown in Figure 2, the small diameter disk (S) is inserted into the insertion slot 1.
If the disc is inserted from approximately the center of the disc (
S) is fed while being held between the drive roller 14 and the opposing member 14a in the state shown in FIG. 9A (at the small diameter portion of the drive roller 14). Drive roller 14 and opposing member 14a
Due to the concave shape of the disk (S) is fed through the center of the insertion path. As shown in FIGS. 2 and 8A, when the tip of the small-diameter disk (S) hits the (A) part of the stopper 31, the (B) and (C) parts It comes into contact with the disc regulating protrusions 37a and 37b. That is, the disc regulating protrusions 37a and 37
b are not pushed toward the stopper 31, so that the lock pins 38a and 38b provided on the lock release levers 35a and 35b are simultaneously pushed into the lock groove 42.
a, 42b. Therefore, in this case, the slider 30 remains locked and does not move to the right in FIGS. 2 and 8A. Therefore, the disk (S) remains at the position where its center reaches the top of the turntable 23.

Furthermore, in the case of a small-diameter disk (S), it is not necessarily inserted into the center of the insertion port 12;
As shown in the figure, the disk (S) is attached to the side chassis 15.
In some cases, it is inserted in a state where it is biased toward the a side. Even in such a case, the disk (S) can be guided to the central position of the passage. This is because the drive roller 14 and the opposing member 14a have a concave center as shown in FIG. 9A, so one side edge of the small diameter disk (S) is held between the large diameter portion of the drive roller 14 When the drive roller 1
This is because the axis of the disc (S) is tilted and the balance of the feeding force is lost, and during the feeding operation, a force is exerted to return the disk (S) to the center. Discs that are fed even more lopsidedly (S)
The distance aX from the disk regulating protrusion 37a that first hits the edge of the disk to the end of the passage is narrower than the radius of the small diameter disk (S). Therefore, when this disk is pulled in along the path shown in FIG. 3 and hits the regulating protrusion 37a, the regulating protrusion 37a
The disk (S) is rotated and fed using point a as a fulcrum so that its portion (a) hits the stopper 31, and the center of the disk 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 figure, and this force releases the lock release lever 35a provided with the disc regulating protrusion 37a.
rotates clockwise, and the lock pin 38a locks into the upper chassis 2.
It comes off from the lock groove 42a of No.5. However, the lock bin 38 provided on the other lock release lever 35b
b does not come off from the lock groove 42b, the slider 30 remains locked, and the stopper 31 is not pushed toward the back of the passage. The same is true when the small-diameter disk (S) is fed biased toward the opposite side from 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 (SQL) is energized, the motor power to the drive roller 14 is cut off, and the motor 17 The release pin 28 is driven rightward from the solid line position in FIG. 7 to the dotted line position by the driving force. Therefore, the release pin 28 separates from the regulating piece 27, and the upper chassis 25, which had been lifted by the release pin 28, descends due to the force of the spring, and the clamper 26
The disc (S) is clamped by the turntable 23 and the turntable 23. In conjunction with this operation, the first roller 14
It descends to the position indicated by the dotted line in the figure.

Next, when a large-diameter disk (L) is inserted from the insertion port 12 and fed in by the drive lever 14 (see FIG. 9A), the edge of the disk (L) (see FIG. ) part and (e) part almost simultaneously press the disc regulating protrusion 37.
Corresponds to a and 37b.

Further, since the stopper 31 has a concave shape that substantially follows the outer periphery of the disk (L), the disk (L) comes into contact with the stopper 31 almost along the entire surface, so that both regulating protrusions 37a and 37
b are pushed toward the stopper 31 almost simultaneously. Therefore, the lock release levers 35a and 35b, on which the regulating protrusions 37a and 37b are respectively provided, rotate in the direction of mutually opening against the spring 39, and the lock pins 38a and 38b provided on the respective ones are released almost simultaneously from the upper chassis. 25 from the lock grooves 42a and 42b, and the slider 3
0 is unlocked. Therefore, the drive roller 14
When the disk (L) is fed in, the stopper 31 is pushed eight times toward the back of the passage. When moved a certain distance (for example, about 2/3 stroke), the eject lever 45, which rotates together with the slider 30, is rotated clockwise by the reversing spring 47, and the slider 30 and stopper 31 are automatically moved to the back of the passage. be moved in a direction. With the stopper 31 moved toward the back of the passage, the disk (L) is at a position where its center coincides with the top of the turntable 23.

When it is detected that a large-diameter disk (L) is loaded, the release bin 28 moves from the solid line position to the dotted line position in FIG. The upper chassis 25 is lowered, and the disk (L) is clamped by the clamper 26 and turntable 23. Further, the drive roller 14 is lowered to the position shown by the dotted line in FIG.

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

As mentioned above, when it is detected that the disk (S) or disk (L) is fed to the correct position, the release bin 28 moves eight shifts to the right from the position indicated by the solid line in FIG. The drive lever 61 installed on the inside side of the lower chassis 22 to reach the position 6 is moved to the right in the figure by the force of a spring 66, and the support shaft 62 is supported by the same spring 66. clockwise as
energized. When the release bin 28 moves to the right in the figure, the protrusion 61. of the drive lever 61. e, and the drive lever 61 rotates counterclockwise within the range in which the regulation bottle 64 can move within the regulation hole 65. That is, when the release bin 28 is moved to the right, the drive lever 6
1 remains as it is, and when the protrusion 61c once escapes toward the lower blade and the release pin 28 finishes passing, the drive lever 61 returns clockwise by the force of the spring 66. In the disk removal operation, the release bin z8 moves to the left from the position indicated by the dotted line in FIG. 7 and reaches the position indicated by the solid line. is pulled, and the drive lever 61 is moved to the left in the figure. The regulation bin 64 reaches the oblique side 65b from the upper edge 65a of the regulation hole 63 due to the movement to the left.
The drive lever 61 is rotated counterclockwise by the oblique side 65b (the state indicated by the dashed line in FIG. 7). Therefore, protrusion 6
1c is removed 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 removal operation, the drive lever 61 is moved 8 to the left in the figure.
He is made to work, and then returns to the right direction. In this operation, the drive pin 67 provided at 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.

In the loading operation of the small-diameter disk (S), the slider 30 remains in the state shown in FIG. 8A and does not move. In other words, the eject lever 45 is kept rotated counterclockwise by the force of the reversing spring 47. Further, the intermediate lever 51 connected to the eject lever 45 remains rotated clockwise. Therefore, as shown in FIG. 6, the operating piece 5Ia of the intermediate lever 51 is separated from the drive pin 67. Therefore, the drive bin 67, which moves with the movement of the drive lever 61 during the above-mentioned ejection, is moved by this operating piece 51a.
It doesn't hit me.

On the other hand, when a large-diameter disk (L) is loaded, the stopper 31 moves toward the back and ejects the disk h5, as shown in FIG. 8B. Therefore, it is rotated clockwise. Therefore, the intermediate 1 connected to the eject lever=45,
The bar 51 is rotated counterclockwise, and the actuating piece 51
A has moved a lot to the right. Therefore, in the removal operation of the C1 large-diameter disk (L), as the drive lever 61 is moved leftward, the drive bin 67 presses the actuating piece 51a, and the intermediate lever 51 is driven clockwise. Along with this, the first eject lever 45 rotates counterclockwise, and when it rotates to a certain angle, the reversing spring 47 causes a yaw.
- The slider 30 and the stopper 31 are rotated slowly, and the slider 30 and the stopper 31 are returned toward the insertion port 12.

Also, the release bin 28 is the seventh Cj',j %,: ,1.
3 and move to the left side of the figure, this causes the restriction piece 27 to
is lifted, the upper chassis 25 is rotated upward, and the disc clamping by the clamper 26 is released.

Further, the drive roller 14 shown by a dotted line in FIG. 7 rises, the disk is held between this roller 14 and the opposing member 14a, and the disk is ejected toward the insertion slot 12 by the reverse rotation of the drive roller 14.

Next, detection and identification of the inserted disc will be explained.

As shown in FIGS. 2 and 3, the disk insertion path is provided with optical detection points indicated by A-D. In the following description, the detection point will be described as ON when the disc blocks light, and OFF when the disc does not block light.

First, when the motor of the drive roller 14 is stopped,
When a small-diameter disk (S) or a large-diameter disk (L) is inserted from the insertion slot 12, the detection point A is turned on by the leading edge of each disk, which starts the motor and rotates the drive roller 14. , the disc is retracted.

Next, it is determined whether the disc is a small diameter disc (S) or a large diameter disc (L), and whether the center of the disc is directly above the turntable or not, as follows. When the center of the large-diameter disk (L) is placed on the turntable 23, detection point B and detection point A are ON, and detection point C is OFF. While the large diameter disc (L) is being retracted,
There are cases where detection points A%, B, and C are all turned ON, but in this case, loading is complete when detection point C is turned OFF. Further, when the center of the small-diameter disk (S) is placed on the turntable 23, the detection point B is ON, and the detection points C and A are OFF.

Detection points A and B are arranged at positions where they cannot be turned on at the same time due to the small diameter disk (S). Therefore, for example, depending on the position where the small-diameter disk (S) is pulled in, only detection point A may be ON, or detection points A and C may be ON.
may turn on at the same time, but when the disk (S) advances and only detection point B turns on, it can be confirmed that it is loaded in the correct position. That is, it is possible to identify whether the disc is a small diameter disc (S) or a large diameter disc (L) depending on whether or not detection points A and B are ON at the same time.

The arrangement of the detection points described above makes it possible to detect disk loading and identification using a flowchart as shown in FIG. 11, for example. First, the motor that drives the drive roller 14 is OFF, and the detection point A is ON.
When this happens, a start command is issued to the motor to rotate the drive roller 14 in the feeding direction. Then detection point A
There may be cases where detection point C turns on while remains on, or detection point B turns on in addition to this, or only detection point A remains on, but as a control, , detection point B is ON
When B is turned ON, an operation to confirm whether or not the identification and loading operations are completed is started. That is, when detection point B turns ON, check detection points A and C, and if both are OFF, loading of the small-diameter disk (S) is complete. Therefore, the solenoid (SQL) is energized, the roller driving the drive roller 14 is stopped, and the above-mentioned clamping operation is started. If detection point A and C are both ON when detection point B turns ON, a large diameter disk (
L) is in the process of being pulled in. Therefore, if you confirm that B is ON and C is OFF, the large diameter disk (L)
Loading is complete. Therefore, the drive roller 14 is stopped and the clamping operation is started.

Next, disk ejection control is performed as follows.

In the case of a large-diameter disk (L), the clamp is released by an eject operation, and the drive roller 14 is reversed by the motor 17 to eject the disk (L). And the detection bond C, which was OFF until then, is now ON.
The motor will stop when it turns OFF after that.

At this time, as shown on the left side of FIG. 2, the rear end of the disk (L) is positioned on the drive roller 14, and the disk (L) is in a state protruding from the insertion slot 12. Next, in the ejection operation of the small diameter disk (S), after the clamp is released by the eject operation, the motor 17 is driven for a certain period of time. The small-diameter disk (S) stops at a position away from the drive roller 14, and the small-diameter disk (S) stops with its tip protruding from the insertion opening 12.

Also, when the disk that has been ejected once is pushed in again, the detection point C will be detected in the case of a large diameter disk (L)
This is confirmed by turning ON again, and in the case of a small-diameter disk (S), confirmation is made by checking that detection point D is turned ON. With this confirmation, the drive roller 14
The drive roller 14 may be driven again to push the disc toward the insertion slot 12, or the drive roller 14 may be used to pull the disc in again to standby for another reproduction operation.

As described above, no matter which disc (S) or (L) is used, the discs (S) and (L) can be stopped at the same position on the turntable 23, and the subsequent operation can be controlled by either disc. The same can be done for (S) and (L).

Therefore, any disk (S) and (
L) can be reproduced. Also, especially small diameter discs (
S) can be inserted from a position away from the center of the insertion slot 12, so in a car-mounted disc player,
Even when the driver inserts a disc, the loading operation becomes easier.

In addition, in the example shown in the figure, the stopper 31 has a curved shape along the outer periphery of the large-diameter disk (L).
1 may be a flat plate located behind the disk regulating projections 37a and 37b, or may be a plurality of projections arranged along the curved surface of the illustrated embodiment.

〔Effect of the invention〕

According to the present invention as described above, disks having different diameters can be inserted through the same insertion opening and placed on the turntable of the disk drive mechanism without using an adapter. Further, the stopper is locked at a position where it touches the small diameter disk, and when a large diameter disk is fed, the stopper is unlocked and the stopper moves back together with the disk. By locking the stopper in this manner, unnecessary repulsive force is not applied to, for example, a small-diameter disk, and the disk can be stably installed.

In addition, if a pair of disc regulating protrusions are provided that are located closer to the insertion port than the stopper, and the stopper can be unlocked by pushing the pair of disc regulating protrusions when a large diameter disc is inserted, it is possible to insert a large diameter disc. Just do
The stopper can now be unlocked.

Furthermore, by making the stopper curved to follow the outer periphery of the large-diameter disk, the outer periphery of the large-diameter disk can surely hit the stopper, and at this time, the disk regulating protrusion can be reliably pushed toward the stopper. .

Furthermore, if a reversing spring is used to push the stopper both toward the insertion port and toward the back of the passage,
Even if the stroke of the return member is small, the stopper can be reliably driven.

[Brief explanation of the drawing]

FIG. 1 is a front view showing the operation section of a disc player according to an embodiment of the present invention, FIGS. 2 and 3 are plan views of the disc player main body according to an embodiment of the present invention, and FIG. 4 is an exploded view of the disc drive unit. Perspective view, Figure 5 is similar to Figures 2 and 3.
6 is a partial plan view of the disk drive unit showing the structure of the return member, FIG. 7 is a side view of FIG. 6,
8A and 8B are partial plan views of the disk drive unit showing the operation of the stopper and the lock release mechanism, FIGS. 9A and 9B are front views showing the drive roller and the opposing member, and FIGS.
FIG. 11 is a plan view showing a conventionally used small-diameter disk adapter, and FIG. 11 is an explanatory diagram showing a control flowchart of the detection section in an embodiment of the present invention. S...Small diameter disk, L...Large diameter disk, 1
2... Insertion port, 14... Drive roller, 23... Turntable, 25... Upper chassis, 26... Clumber, 28... Clamp release pin, 30... Slider, 31... ...Stopper, 35a, 35b...Lock release lever, 37a, 37b...Disc regulation protrusion, 42a, 42b...Lock groove, 45-...Eject lever 47...Reversal spring, 51... Intermediate lever 61... Drive lever 67... Type moving bottle. Figure 5. 98 An

Claims (1)

[Claims] 1. A disc player that is provided with an insertion opening into which discs of different diameters are inserted, and a disc drive mechanism located at the back of the insertion opening, wherein the disc insertion passage has a disc drive mechanism with a small diameter. A stopper is provided, which is located at a position where the disk hits the disk when the disk is inserted into the disk drive mechanism, and which moves toward the back of the disk insertion path together with the disk when a large diameter disk is inserted onto the disk drive mechanism. The stopper is locked at a position where it hits a small-diameter disk, and is provided with an unlocking member that unlocks the stopper when a large-diameter disk is inserted. A pair of disc regulating protrusions are provided at positions sandwiching the disc, and when a small diameter disc is placed on the disc drive mechanism, the pair of disc regulating protrusions protrude further toward the insertion opening than the stopper and close the edge of the small diameter disc. When a large-diameter disk is inserted, the lock release member is pushed back toward the stopper by being pushed by the disk, and when the pair of disk regulating projections retreat toward the stopper, the lock release member is The disc player 3 according to claim 1, wherein the stopper is operated to unlock the stopper, and the disc player 4 according to claim 2, wherein the stopper has a shape that follows the outer diameter of the large-diameter disc on the side facing the disc. A reversing spring is provided that biases the disk toward the insertion port, and when the stopper moves toward the back with the large-diameter disk, the biasing direction is toward the back of the disk passage, and the large-diameter disk is removed. The disc player according to claim 1 or 2, further comprising a return member that pushes the stopper toward the insertion port against the biasing force of the reversing spring during operation.