JPH0636525Y2 - Disc player - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a disc player in which a disc inserted from a disc insertion portion is positioned on a disc drive mechanism, and particularly, the disc is placed on the disc drive mechanism. The present invention relates to a disc player that can be prevented from being displaced and installed.

[Conventional technology]

Conventionally, compact discs were generally of a relatively large diameter (12 cm in diameter) in which a large number of songs were stored, but due to the spread of CD players in recent years, they have a smaller diameter (8 cm in diameter). Thus, so-called CD singles, which are discs storing 2-3 songs, have become popular, and development of a CD player capable of reproducing both the large-diameter disc and the small-diameter disc is required.

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.

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 inserted. Groove to allow elastic expansion of the
It may pass over the optical detecting means for detecting disk insertion.
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.

Therefore, a disc player has been considered in which a small-diameter disc can be directly inserted into an insertion opening having an opening width dimension into which a large-diameter disc can be inserted. In this disc player, the small-diameter disc inserted from the insertion port is guided toward the center of the device, positioned on the disc drive mechanism, and the center of the disc is set on the turntable of the disc drive mechanism. There is.

[Problems to be solved by the device]

In the disc players compatible with discs with different diameters as described above, when a disc with a small diameter is inserted from a position that is offset from the center with respect to the insertion slot, the disc may not be reliably guided to the center of the device. There is a case where the center of the disc and the turntable are misaligned in the state of hitting the member. At this time, the center of the disk cannot be reliably clamped by the clamper and the ten table.

Also, when a large-diameter disc is inserted through the insertion slot, the disc passage area inside the device is almost the same as the disc diameter, and positioning on the disc drive mechanism is easier than when a small-diameter disc is inserted. is there. However, even if the disk has a large diameter, once it is positioned on the disk drive mechanism, if the disk moves due to, for example, vehicle body vibration in the case of a vehicle, the center of the disk will move from the center of the turntable. The disc may not be securely clamped by the turntable and the clamper due to the displacement.

The present invention solves the above-mentioned conventional problems, and provides a disc player capable of preventing a disc that has been inserted and carried in from an insertion portion from being displaced and held by a disc drive mechanism. Is intended.

[Means for Solving the Problems]

The present invention is a disc player provided with a disc insertion portion, a loading mechanism located inside thereof, and a positioning member for positioning the disc loaded by the loading mechanism with respect to the disc driving mechanism. A detection unit is provided at a position where the detected disc can be detected and the position of the disc positioned with respect to the disc drive mechanism deviates from the detection area, and the disc is detected within a predetermined time after the detection unit detects the disc. A control circuit is provided for operating the carry-in mechanism in the disc ejection direction when the detection state of the detector is not switched without deviating from the detection area.

Alternatively, a detection unit that detects the disc inserted from the disc insertion unit and another detection unit that switches the detection state when positioned with respect to the disc drive mechanism are provided, and the detection unit detects the inserted disc. A control circuit is provided for operating the carry-in mechanism in the disc ejection direction when the detection state of the other detection unit is not switched within a predetermined time after the detection.

[Action]

According to the first means, when the detection state of the detection unit does not switch within a predetermined time with reference to the time when the detection unit detects the disc inserted from the insertion unit, the disc is reliably positioned on the disc drive mechanism. It is determined that the disc is not ejected, the insertion mechanism is driven in the reverse direction, and the disc is ejected.

According to the second means, the disc is not accurately positioned with respect to the disc drive mechanism when the disc is detected by the detection unit and the detection states of the other detection units are not switched within a predetermined time. The disc is ejected by the ejection mechanism.

In either case, the disc can be reliably positioned in the disc drive mechanism by reloading it after it has been ejected.

〔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. A display 13 including a liquid crystal display element for performing various displays and a plurality of types of discs having different diameters such as a small-diameter disc (S) and a large-diameter disc (L) are inserted in the operation panel 11. An insertion slot 12 is provided. The operation panel 11 is attached to 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. 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 is supposed to be done.

The opposite side of the drive roller 14 is a plastic facing member 14a as shown in FIGS. 9A and 9B. This facing member 1
The surface of 4a 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. The drive roller 14 presses the disc with the opposing member 14a by a predetermined spring pressure during the disc pulling operation, and escapes downward and separates from the disc after the disc is completely inserted. The facing member 14a does not rotate, and the disc fed by the drive roller 14 simply slides. However, as the facing member 14a, it is also possible to use a criminal rotatable roller whose both ends gradually become thicker like the driving roller 14. In the disk pull-in operation by the drive roller 14 and the facing member 14a, a large-diameter disk (L)
9A, a 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 and the facing member 14a
The large-diameter disc (L) can be strongly clamped by the clamping force of the spring pressure and the disc can be pulled in by a stronger driving force. Also, small diameter disc (S)
9B, a small-diameter disk (S) is driven by a thin portion on the center side of the driving roller 14 as shown in FIG. 9B. Therefore, the small-diameter disk (S) is sandwiched by 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 pulled in by force. If a 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 clamped by the large-diameter portion of the drive roller 14 and pulled in, the disc (S) 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.

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

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. As shown in FIG. 4, an upper chassis 25 is provided at one end of the lower chassis 22. A support hole 25a is formed in the base portion of the upper chassis, and the support hole 25a is rotatably supported by a shaft provided in the lower chassis 22. The upper chassis 25 is always pulled toward the lower chassis 22 by a spring (not shown). A clamper 26 that clamps a disk (S) or (L) mounted on the turntable 23 is rotatably supported on the upper chassis 25.
Further, on the side of the upper chassis 25, a restriction piece 27 for restricting the descent of the clamper 26 onto the turntable 23 is integrally formed by bending. Adjacent to the regulation piece 27 is a waiting portion 27a for leaning the upper chassis 25 upward until the disk (S) or (L) is supplied onto the turntable 23 and waiting the same. The inclined portion 27b is formed. The releasing pin 28 (see FIG. 5) for releasing the clamp slides on the inclined portion 27b when ejecting the disc (S) or (L), and the releasing pin 28 enters under the standby portion 27a. The upper chassis 25 can be lifted at that time. 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 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 is provided on the lower surface of the upper chassis 25 (the surface facing the lower chassis 20), and a stopper 31 is integrally provided on the slider 30. Has been. 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). . Stopper 31 is formed by bending with the above curvature by resin or the like,
The concave curved surface side is directed toward the turntable 23. On top of the triangular slider 30, a pair of pins 32
And 33 are provided. 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. Unlock levers 35a and 35b
Of the long arm of the
And 37b are installed. With each lock release lever 35a
Lock pins 38a and 38b are attached upward at the tip of the short arm of 35b. Sliding hole in the upper chassis 25
A pair of auxiliary holes 41a and 41b are formed so as to sandwich 34. The pair of auxiliary holes 41a and 41b extend linearly 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. Each auxiliary hole 41a
Lock grooves 42a and 42b are integrally formed at the ends of the turntables 41b and 41b on the turntable side. This lock groove 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. The force of this spring 39 causes a pair of lock pins 38a and 3
The lock release levers 35a and 35b are urged so that the 8b come close to each other. The biasing force of this spring 39 is set to be fairly weak.

As shown in FIG. 8A, 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 are inserted into the auxiliary holes 41a and 41, respectively.
It fits in the lock grooves 42a and 42b at the end of b. 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. Also like this slider
When 30 is locked, unlock lever 35a
And a pair of disc regulating protrusions 37a and 37 provided on 35b
b is located to the left of the arc-shaped stopper 31 in the drawing. The center of the small-diameter disc (S) is the table 23.
Lock pins 38a and 3 when they are approximately aligned with the center of
In the state where 8b is locked in the lock grooves 42a and 42b, the pair of disc restriction protrusions 37a and 37b come into contact with the edges of the small-diameter disc (S). That is, Tane table 23
The small-diameter disc (S) supplied on the top of the disk hits the center of the arc-shaped stopper 31 at the edge (a),
At this time, both the (b) and (c) portions of the edge come into contact with the disc restricting protrusions 37a and 37b. The small-diameter disk (S) is positioned so as to reach the center of the ten table 23 at the three points (a), (b) and (c). Further, the distance l between the edge of the disc passage shown in FIG. 3 and each disc regulating projection 37a and 37b.
Is set to have a size smaller than the radius of the small-diameter disk (S).

When the 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). When the edge (a) of the edge of the disk (L) hits the stopper 31, the edges of the edge (d) and (e) of the edge of the disk (L) cause the disk restricting protrusions 37a and 3a.
7b is pushed to the right in the figure (direction behind the passage). as a result,
The lock release levers 35a and 35b rotate to face each other against the force of the spring 39 to open each other, and the pair of lock pins 38a and 38b
Is disengaged from the lock grooves 42a, 42b of the upper chassis 25. Therefore, the lock of the slider 30 is released, and 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 disk (L) pushes the stopper 31 inward.

An eject lever 45 is provided on the upper surface of the upper chassis 25. The eject lever 45 is rotatably supported by a support pin 46. A long hole 45a is formed at the tip of the eject lever 45, and the pin 33 provided on the slider 30 is a sliding hole formed on the upper chassis 25.
It penetrates through 34 and 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 interlocked with the rotational movement of the eject lever 45. Base arm 45b of eject lever 45 and upper chassis 2
A reversing spring 47 is hooked between 5 and. 8th A
As shown in the figure, when the slider 30 is moving in the direction of the insertion opening, the ejecting lever 45 is biased counterclockwise by the reversing spring 47, and the slider 30 is pressed to the left in the figure. When the slider 30 is unlocked and the slider 30 moves to the right in the figure by about 2/3 strokes in the firing process, the urging direction of the reversing spring 47 is reversed, and the eject lever 45 is urged clockwise. The slider 30 is pressed to the right in the figure (toward the passage).

An eject 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. This eject drive lever 51
A drive pin 53 is provided at the end of the arm of the drive pin 53, and the drive pin 53 passes through a notch (not shown) formed in the upper chassis 25 and projects upward. The drive pin 53 is a long hole 45 formed in the eject lever 45.
It is inserted in c. An operating piece 51a is formed on the eject drive lever 51, and the operating piece 51a projects from the side edge of the upper chassis 25. Then, the eject drive lever 51 is driven by a drive mechanism (not shown), and the eject lever 45 is rotationally driven.

As shown in FIG. 2, A, A
Optical detectors are provided at four locations indicated by B, C, and D. Each of the optical detectors A to D has a light emitting element and a light receiving element that face each other across the disc insertion passage. A member for narrowing the light to a constant diameter is provided.
Of the optical detectors A to D, the first optical detector A is for disc insertion and ejection detection, and is arranged inside the insertion opening 12 and at the center of the disc insertion passage. The second optical detector 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. Has been done. When the disc is not detected by the second optical detector B within a predetermined time after the disc insertion is detected by the first optical detector A, the small-diameter disc (S) reaches the regular position. It is judged that it is not inserted and is stopped at the middle position. In the third optical detector C, the center of the large-diameter disk (L) is the turntable.
It is located at a position away from the edge of the disc (L) when it is above 23. When the insertion of the disc is detected by the first optical detector A and the detection of the third optical detector C is not switched within a predetermined time after the third optical detector C is blocked by the disc, a large diameter is detected. It is determined that the disc (L) has not been inserted to the proper position. The third optical detector C also has a function of detecting that a large-diameter disc (L) has been ejected, and this disc (L) has moved to a position where it does not block the optical detector C. Sometimes the ejection operation is completed. Also the fourth
The optical detector D of FIG. 2 detects the pushing operation by blocking the disc (C) when the small-diameter disc (S) ejected to the position shown on the left side in the figure is pushed again. It is for doing. The fourth optical detector D detects the tip of the disc (S) when the tip of the disc (S) having a small diameter is inserted to the position where it is sandwiched between the drive roller 14 and the facing member 14a. It is provided at a position where it is blocked.

As shown in FIG. 6, the received light output of each of the optical detectors A to D is detected by the detection circuit 61, and this detection signal is input to the microcomputer 62. Then, the motor drive circuit 63 is controlled according to the software input to the microcomputer 62, and the motor 17 for driving the drive roller 14 is rotated in the forward direction (disk feed direction) and the reverse direction (disk discharge direction). Drive controlled.

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 shown in FIG. 5 is moved to the left. And this release pin 28
Contacts the standby portion 27a of the restriction piece 27 formed on the upper chassis 25, 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.
The slider 30 connected by the pin 33 and the
Is pushed in the direction of. 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 fitted into 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 regulation protrusions 37a and 37b are located further toward the insertion port 12 side than the stopper 31.

A small-diameter disk (S) is inserted, and is nipped by the drive roller 14 and the opposing member 14a and drawn. As shown in FIG. 2, when a small-diameter disc (S) is inserted from approximately the center of the insertion slot 12, this disc (S) is
9A is sandwiched by the drive roller 14 and the opposing member 14a (the small diameter portion of the drive roller 14) and fed. Due to the concave shape of the drive roller 14 and the facing member 14a, 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. The disk control projections 37a and 37b come into contact with each other. That is, neither of the disc restriction protrusions 37a and 37b is pushed in the direction of the stopper 31, and therefore the lock release levers 35a and 35b.
Lock pins 38a and 38b provided on the
It does not come off from 42a and 42b. Therefore, in this case, the slider 30 remains locked, and the slider 30 shown in FIG.
It does not move to the right in Figure 8A. Therefore, the disc (S) stays at the position where the center of the disc (S) reaches the turntable 23.

Also, in the case of a small-diameter disc (S), the insertion port is not always
It is not limited to be inserted in the central portion of 12, and for example, as shown in FIG. 3, the disc (S) may be inserted in a state of being offset to the side chassis 15a side. Even in such a case, the disc (S) can be guided to the central position of the passage. Because the drive roller 14 and the facing member 14
Since a has a concave shape in the center as shown in FIG. 9A, one side edge of the small-diameter disk (S) has one side edge.
This is because the shaft of the drive roller 14 is tilted and the balance of the feed force is lost when it is sandwiched by the large diameter part of the drive roller 14, and a force acts to return the disc (S) to the center during the feeding operation. . Further, the distance l between the disc regulation protrusion 37a that first hits the edge of the disc (S) that is sent further offset and the passage end is
It is narrower than the radius of the small-diameter disk (S). Therefore, when this disk hits the restriction projection 37a drawn in along the path shown in FIG. 3, the disk (S) is rotated about the restriction projection 37a so that its (a) part hits the stopper 31 and is fed. The center of the disc is the turntable 23.
Will be guided over. At this time, the edge of the disc (S) pushes the disc regulating protrusion 37a to the right in the figure, and this force causes the lock release lever 35a provided with the disc regulating protrusion 37a to rotate in the clockwise direction so that the lock pin 38a is disengaged from the lock groove 42a of the upper chassis 25. However, since the lock pin 38b provided on the other lock release lever 35b does not come off the lock groove 42b, 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 disc (S) 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 shown in FIG. 5 is excited and the motor power to the drive roller 14 is cut off. The release pin 28 is driven to the right by the driving force of the motor 17. Therefore, the release pin 28 separates from the restriction piece 27, and the upper chassis 25 lifted by the release pin 28 descends by the force of the spring, and the clamper
The disc (S) is clamped by the turntable 23 and the turntable 23. In conjunction with this operation, the drive roller 14 descends and separates from the disc.

Next, a large-diameter disk (L) is inserted from the insertion opening 12,
When fed by the drive roller 14 (see FIG. 9A),
As shown in FIG. 8A, the (d) portion and the (e) portion of the edge of the disc (L) contact the disc regulating protrusions 37a and 37b almost at the same time. Further, since the stopper 31 has a concave shape substantially along the outer periphery of the disk (L), the disk (L) hits almost the entire surface of the stopper 31, so that both the regulation projections 37a and 37b move toward the stopper 31 almost at the same time. Pressed. Therefore, the lock release retears 35a and 35b provided with the restriction protrusions 37a and 37b rotate in the directions of opening against each other against the spring 39, and the lock pins 38a and 3 provided on the respective lock protrusions 35a and 35b.
8b is disengaged from the lock grooves 42a and 42b of the upper chassis 25 almost at the same time, and the slider 30 is unlocked. Therefore, when the disk (L) is further fed by the drive roller 14,
Pushed by this, the stopper 31 is moved in the depth direction of the passage. When it moves a certain distance (for example, about 2/3 strokes), 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 depth direction of the passage, the center of the disk (L) is located on the turntable 23.

When it is detected that the large-diameter disk (L) is loaded, the upper chassis 25 descends as in the small-diameter disk (S), and the disk (L) is clamped by the clamper 26 and the turntable 23. To be done. Further, the drive roller 14 descends and separates from the disc.

In the disc ejecting operation, first, in the case of a disc (S) having a small diameter, the upper chassis 25 rises and the clamper 26 separates from the disc. Then, the drive roller 14 is raised to the position where it comes into contact with the disc and is rotated in the reverse direction, so that the disc (S) is ejected from the insertion slot. In the case of a large diameter disc (L),
The upper chassis 25 rises to release the disc clamp, and the eject drive lever 51 is driven clockwise. Along with this, the eject lever 45 rotates counterclockwise, and when it rotates to a certain angle, the reversing spring 47
Further, the slider 30 and the stopper 31 are returned to the insertion opening 12 by being further rotated. Then, the drive roller 14 rises and rotates in the reverse direction to eject the disc from the insertion slot.

Next, the detection operation by the optical detectors A to D and the rotation control of the drive roller based on this detection operation will be described.

In the following description, each of the optical detectors A to D will be described as ON when the light is blocked by the disk and OFF when the light is not blocked by the disk. FIG. 7 is a flow chart showing the detection operation by each optical detector and the control by the microcomputer 62 (control by software) based on this detection operation.

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 first end of each disk
The optical detector A is turned on (see (I) in FIG. 7), whereby the motor 17 is started, the drive roller 14 is rotated in the normal direction, and the disc is pulled in.

Next, it is discriminated whether the disc is the small disc (S) or the large disc (L) and whether the center of these discs is directly above the turntable or not as follows.

First, when a large-diameter disk (L) is inserted, after the first optical detector A is turned on, the third optical detector C is turned on (see (II)). In case of large diameter disc (L),
The third optical detector C is always turned on. In the case of a small-diameter disk (S), the optical detector C may be ON or may be OFF. In the microcomputer 62, a predetermined time is set by a timer or the like with reference to when the first optical detector A is turned on, and the second time is set within this time.
It is determined whether the optical detector B of is turned on ((II
See I) and (III ')). Similarly, the third optical detector C is turned on.
A predetermined time is set by a timer, etc., after the end of the day, and the third optical detector C is turned off within this time.
Or not (see (IV)). When a large-diameter disk (L) is inserted and its center moves normally on the turntable, first the optical detector C is turned on in (II) and the optical detector B is turned on for a predetermined time in (III). The optical detector C, which has been turned on once, is turned on within a predetermined time. Both optical detectors B
It was confirmed that the first optical detector A was ON in addition to the switching of C and C (see (V)), and the large-diameter disk (L)
Is determined to have been loaded in the proper position.

When a small-diameter disk (S) is inserted and its center moves to the regular position on the turntable, first (I)
After the first optical detector A is turned on, the third optical detector C is turned on once, or the optical detector C is turned on.
Without turning ON, the second optical detector B turns ON within a predetermined time in (III) or (III '). This optical detector B is turned on within a predetermined time, and the third
When the optical detector C is turned off within a predetermined time and the first optical detector A is turned off at (V) or (V '), the small-diameter disc (S) is loaded in the regular position. It is determined that The first optical detector A and the second optical detector B are arranged at positions that cannot be turned on at the same time by the small-diameter disk (S). Therefore, for example, when the small-diameter disk (S) is pulled in, only the first optical detector A may be turned on or both the first and third optical detectors A and C may be turned on depending on the insertion path. However, when the disc (S) advances and the second optical detector B is turned on, the first optical detector A and the third optical detector C must be OF.
It becomes F, and at this time, you can confirm the loading to the regular position. That is, the optical detector A is turned on in (I) of FIG.
After that, when the optical detector C is turned on, (I
Small diameter disc (S) through control steps of V) and (V)
Is judged to have reached the regular loading position. If the optical detector C does not turn ON, (III ') and (I
It is judged that the small-diameter disc (S) is loaded in the regular position through the control step V ').

A large-diameter disk (L) is inserted here, and the drive roller 14
During the feeding operation by, for example, the disc may be slightly biased due to the vibration of the vehicle body in the case of in-vehicle equipment,
It is assumed that the disk (L) cannot be loaded to the regular position as shown in FIG. When the large-diameter disc (L) is not loaded to the proper position, the disc is positioned on the third optical detector C, and this optical detector C
It remains ON. In this way, when the optical detector C is once turned on and is not turned off within a predetermined time in (IV), the motor 17 driving the drive roller 14 is rotated in the reverse direction (see (VI)), The disk (L) having the diameter is once returned in the direction of the insertion port. When the large-diameter disk (L) is disengaged from the second optical detector B and the optical detector B is turned off (see (VII)), the driving row 14 is normally rotated again, and the disc The feeding is resumed. When the optical detector C is turned off within a predetermined time, it is confirmed that the optical detector A is turned on and it is detected that the large-diameter disk (L) is loaded in the regular position. If the optical detector C is not turned off within the predetermined time, the drive roller 14 is repeatedly rotated in the normal direction again.

Also, in the case of a small-diameter disk (S), if it is not loaded in the proper position, the second disk in (III) or (III ')
Optical detector B is not turned on within the specified time. Therefore, in this case, as shown in (VIII), the motor 17 is reversely driven by a command from the microcomputer 62, the drive roller 14 is reversely rotated, and the small-diameter disk (S) is temporarily returned toward the insertion port. Then, in step (IX), when the first optical detector A detects the disk, the drive roller 14
Is rotated again and the disc feeding is resumed. In this control step (IX), it is judged whether or not the optical detector A is once turned off and then turned on. The optical detector B turns on within a predetermined time after the feeding is restarted, and the first
If the optical detector A of is turned off, a small-diameter disc (S)
Is detected to be loaded in the proper position. If the optical detector B does not turn on within the predetermined time, the process returns to (VIII), the drive roller 14 is rotated in the reverse direction, and the normal rotation is repeated according to the determination in (IX), and the small-diameter disk (S) is properly rotated. The feeding operation is repeated until it is loaded in the position.

Further, in (III '), even if the optical detector B is turned on within a predetermined time, if the first optical detector A is not turned off in (V'), the small-diameter disc (S)
The disc is ejected as if a disc having a diameter different from the original diameter is inserted or a disc-shaped foreign substance is inserted. Similarly, when the motor is rotated in the reverse direction in (VIII), the optical detector A turns off once in (IX).
If it is not N, that is, optical detector A, for example
Even if is kept ON, the disc is ejected because it is determined that it is not the small-diameter disc having the original diameter.

When the small-diameter disc (S) is inserted, it is not always inserted from the center of the insertion port, but it is inserted from a position biased to one side of the insertion port as shown by (β) in FIG. Sometimes. When it is inserted in a biased position as shown in FIG. 3, the disc (S) moves in the depth direction of the passage,
It is assumed that the disk (S) having a small diameter comes to a position slightly closer to the position indicated by (α) and then stops when the disk (S) having a small diameter hits one of the restriction protrusions 37a. In such a case, the disc feeding operation is repeated by the reverse rotation of the drive roller 14 and the forward rotation thereafter. In this disc feeding operation again, the disc is moved leftward from the position indicated by (α) in FIG. Then, the insertion is restarted from that position. Therefore, as shown by (β), the insertion operation is repeated again from a position closer to the center, which is a better condition than the position biased from the beginning. Therefore, each time the feeding is repeated, the probability that the small-diameter disc (S) can be loaded to the regular position becomes high, and the small-diameter disc can be reliably loaded to the regular position.

Next, the disc ejection control is performed as follows.

In the case of the large disc (L), the clamp is released by the eject operation, and the drive roller 14 is reversed by the motor 17 to eject the disc (L). Then, when the third optical detector C, which has been off until then, is turned on once and then turned off, the motor is stopped.
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), the motor 17 is driven for a fixed time after the clamp is released by the eject operation. The small-diameter disk (S) stops at a position separated from the drive roller 14 after this fixed time, and the tip of the small-diameter disk (S) projects from the insertion opening 12 and stops.

When the ejected disc is pushed in again, it is confirmed by turning on the third optical detector C again in the case of the large-diameter disc (L), and the small-diameter disc (S) is confirmed. In the case of, it is confirmed by turning on the fourth optical detector D. Drive roller by this confirmation
The disc 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 a reproducing operation.

In the illustrated embodiment, the second optical detector B detects whether or not the small-diameter disc (S) is reliably loaded, and the third optical detector C detects the large-diameter disc (L).
However, the detection means for these is not limited to the optical detector as described above, and other detection means may be used. Further, the arrangement position of the optical detector is not limited to the illustrated embodiment.

[Effect of device]

As described above, in the present invention, when the disc is not reliably positioned on the disc drive mechanism, the disc is once ejected by the carry-in mechanism. Therefore, it is possible to prevent the disc from being pressed by the clamper in a displaced state, and to prevent damage to the clamper and the disc. If the ejected disc can be carried in again, the probability that the disc can be reliably positioned and clamped can be increased.

[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 figure, FIG. 6 is a circuit block diagram showing a motor controller, FIG. 7 is a motor control flowchart, and FIGS. 8A and 8B are portions of a disk drive unit showing the operation of a stopper and an unlocking mechanism. A plan view, FIGS. 9A and 9B are front views showing a drive roller and a 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, 35a, 35b…
… Unlock levers, 37a, 37b …… Disc control projections, 4
2a, 42b …… Lock groove, 45 …… Eject lever, 47 ……
Reversing spring, 51 …… Intermediate lever, 611 …… Drive lever, 67 …… Drive pin, A …… First optical detector, B ……
2nd optical detector, C ... 3rd optical detector, D ... 4th optical detector.

Claims (2)

[Scope of utility model registration request] 1. A disc player provided with a disc insertion portion, a loading mechanism located inside thereof, and a positioning member for positioning the disc loaded by the loading mechanism with respect to the disc driving mechanism. A detection unit is provided at a position where the inserted disc can be detected and the disc positioned with respect to the disc drive mechanism is out of the detection area. The disc is detected within a predetermined time after the detection unit detects the disc. The disc player is provided with a control circuit for operating the carry-in mechanism in the disc ejecting direction when the detection state of the detector is not switched without deviating from the detection area. 2. A disc player provided with a disc insertion portion, a loading mechanism located inside thereof, and a positioning member for positioning the disc loaded by the loading mechanism with respect to the disc driving mechanism. A detection unit that detects the inserted disc and another detection unit that switches the detection state while being positioned with respect to the disc drive mechanism are provided, and a predetermined time after the detection unit detects the inserted disc. A disc player, wherein a control circuit for operating the carry-in mechanism in the disc ejecting direction is provided therein when the detection state of the other detection unit is not switched.