JP2588512Y2 - Disc player - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk player in which a disk inserted from a disk insertion portion is positioned on a disk drive mechanism, and in particular, the disk is installed on the disk drive mechanism with a displacement. The present invention relates to a disc player capable of preventing the problem.

[0002]

2. Description of the Related Art Conventionally, compact discs generally have a relatively large diameter (diameter of 12 cm) on which a large number of songs are recorded, but with the spread of CD players in recent years, compact discs have become smaller. Discs having a diameter of 8 cm and recording two or three songs, so-called CD singles, have become widespread, and the development of a CD player capable of reproducing both the large-diameter disc and the small-diameter disc has been required. Conventionally, when a disc having a different shape is inserted from the same insertion slot and used, an adapter 1 as shown in FIG. 11 is used. The adapter 1 has a base disk 2 formed to have the same diameter as a large-diameter disk, and has elastically expandable support arms 3 at several locations. The small-diameter disk (S) is provided with a clamp projection 4 provided on the support arm 3.
Is clamped to the center of the adapter. By inserting the adapter 1 through the insertion slot of the CD player, the small-diameter disk (S) can be reliably clamped to the turntable with reference to the outer periphery of the base disk 2.

However, when a small-diameter disk is attached to the adapter 1 and inserted from the insertion opening of the CD player as in the conventional case, a kerf portion 3a (between the support arm 3 of the adapter and the base disk 2) is formed. A groove for allowing the support arm 3 to resiliently expand may pass over the light detecting means for detecting the insertion of the disk during the loading of the disk. In this case, erroneous detection is performed by the detection means, and the disk loading operation is stopped halfway, and a problem occurs such that the disk 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, a small-diameter disc inserted from an insertion slot is guided toward the center of the apparatus, is positioned on a disc drive mechanism, and the center of the disc is set on a turntable of the disc drive mechanism. I have.

[0004]

In a disc player corresponding to discs having different diameters, when a disc having a small diameter is inserted from a position offset from the center with respect to an insertion slot, the disc player is surely guided to the center of the apparatus. May not be
When the disk hits the positioning member, the center of the disk and the turntable may be misaligned. At this time, the center of the disk cannot be reliably clamped by the clamper and the turntable. Also, when a large-diameter disk is inserted through the insertion slot, the disk passage area in the apparatus is almost the same as the disk diameter, and positioning on the disk drive mechanism is easier than when a small-diameter disk is inserted. is there. However, even in the case of a large-diameter disk, after the disk is once positioned on the disk drive mechanism, the disk center moves from the center of the turntable when the disk moves due to, for example, vehicle body vibration in the case of a vehicle. Position shift, with turntable and clamper,
In some cases, the disc is not securely clamped.

The present invention solves the above-mentioned conventional problems, and enables loading of a large-diameter disk and a small-diameter disk.
, These discs are not loaded properly
When ejecting discs of any diameter,
It is an object of the present invention to provide a disk player that can perform the following.

[0006]

SUMMARY OF THE INVENTION The present invention provides a large diameter and a small diameter.
A loading roller capable of loading each of the disks;
Identification to identify the diameter of the disk loaded by the input roller
Means, and the identification means includes a disk having the one diameter.
This disk is detected when the disk is loaded and this disk is
Not detected when disk is positioned on disk drive
The detection unit that is in the detection state and the disk of the other diameter
The detection state switches when positioned by the drive mechanism
And the other detecting unit, and the former detecting unit does not enter the non-detecting state within a predetermined time after the former detecting unit detects the disk.
Itoki, or when the detection state of the other detection unit not switched within the predetermined time <br/>, reverses the feed-in rollers
And a control unit for ejecting the disc is provided.

[0007] The present invention is also applicable to large and small diameter discs.
The loading roller that can carry in each, and the loading roller
Identification means for identifying the diameter of the disc to be carried in.
And the identification means is provided by a combination of the detection outputs.
It has three detectors for identifying a large-diameter disc,
Of the detection outputs of two of the detection units
The combination makes it possible to identify small-diameter discs,
And one of the three detectors is
Even if the disc has a diameter of
It is placed at the position where insertion can be detected and used for insertion detection
And the detection unit for insertion detection detects a disc.
When the loading roller is rotated forward in the disk loading direction,
A predetermined detection unit among the three detection units detects a disk.
Within a predetermined time after the detection, the detection outputs of the three detection units are large.
When it is not a combination to identify the diameter disc,
Indicates that a predetermined detecting unit of the two detecting units
Detection output of the two detection units within a predetermined time after detection
Is not a combination that identifies small-diameter discs
Then, the carry-in roller is reversed, and the disc is ejected.
A control unit is provided.

[0008]

In the first means, a large-diameter disk and a small-diameter disk are used.
In a disc player into which a disc is inserted,
Discs and small-diameter discs can be identified by identification means
At the same time, set a predetermined time, and within this set time,
Disk is detected on the disk drive.
If not, the disc is ejected. This makes
Secure loading of small and large diameter discs on disc drive
The problem of not being performed no longer occurs.

In each of the above-mentioned means, the detecting means constituting the identifying means is provided.
Depending on the part, it is possible to distinguish between a large disc and a small disc.
And identification is completed within a predetermined time using this identification means.
If not, eject discs of any diameter
I can do it.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.
This will be described with reference to FIG. FIG. 1 is a front view showing the operation unit of the disc player. In this figure, 11
Denotes an operation panel. The operation panel 11 includes a display 13 including a liquid crystal display element for performing various displays, and the like.
For example, an insertion slot 12 into which a plurality of types of disks having different diameters such as a small-diameter disk (S) and a large-diameter disk (L) are provided. The operation panel 11 is mounted on the front surface of the player main body (H) so that each function of the player main body (H) can be operated.

The player main 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 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 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 driving roller 14 has a gear 1 outside the side chassis 15b.
6 are attached. As shown in FIG. 5, the gear 16 meshes with various gears 18, 18... For transmitting the rotational force of a motor 17 provided on the side chassis 15b, and the drive roller 14 is rotated by the rotational force of the motor 17. It has become so.

The opposite side of the drive roller 14 is shown in FIG.
This is a plastic facing member 14a as shown in FIGS. The surface of the facing member 14a facing the drive roller 14 is a concave curved surface. This concave shape is opposed to the change in the diameter of the drive roller 14 and has the same curvature as the change in the diameter of the drive roller 14. The drive roller 14 nips the disk with the opposing member 14a with a predetermined spring pressure during the disk pull-in operation, and after the disk is completely inserted, escapes downward and separates from the disk. The opposing member 14a does not rotate, and the disk fed by the drive roller 14 simply slides.
However, it is also possible to use a rotatable roller having a shape in which both ends are gradually thickened, like the driving roller 14, as the opposing member 14a. In the disk retraction operation by the drive roller 14 and the opposing member 14a, when a large-diameter disk (L) is used, the large-diameter disk (L) is moved to the position where the drive roller 14 is thickest as shown in FIG. It can be driven by. Therefore, the large-diameter disk (L) can be strongly pinched by the clamping force of the spring pressure between the driving roller 14 and the opposing member 14a, and the disk is drawn in by a stronger driving force. When a small-diameter disk (S) is used, FIG.
As shown in (B), the small-diameter disk (S) is driven by a narrow portion on the center side of the drive roller 14. Therefore, the small-diameter disk (S) is
And the opposing member 14a are held by a relatively weak force, so that the small-diameter disk (S) is pulled in with a weaker driving force than when driving the large-diameter disk (L). When the 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 nipped by the large-diameter portion of the drive roller 14 and pulled in, the disk (S) Since the balance of the driving force acting on the disc (S) is lost, the disk (S) is guided to the center position of the drive roller 14, that is, the center position of the passage while being fed.

In FIGS. 2 and 3, reference numeral 20 denotes a disk drive unit. The disk drive unit 20 includes four vibration absorbing dampers 19a, 19b attached to both side chassis 15a, 15b.
(The other two do not appear in the figure). Due to the presence of the damper, the disk drive unit 20 is protected from vehicle body vibration and impact when used in a vehicle.

As shown in FIG. 4, the lower chassis 22 of the disk drive unit 20 has a turntable 23 for rotating the disk (S) or (L), a small-diameter disk (S) or a large-diameter disk (L). 1) is provided with an optical pickup mechanism 21 for reading the signal written in (1). 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 at the base 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 drawn toward the lower chassis 22 by a spring (not shown). A clamper 26 for clamping a disk (S) or (L) mounted on the turntable 23 is rotatably supported on the upper chassis 25, and a clamper 26 is provided on the side of the upper chassis 25. A restricting piece 27 for restricting the downward movement on the upper part 23 is integrally formed by bending. The regulating piece 27 has a standby portion 27a for tilting the upper chassis 25 upward and waiting until the disk (S) or (L) is supplied onto the turntable 23, and is adjacent to the standby portion 27a. The inclined portion 27b is formed. When the disc (S) or (L) is ejected from the inclined portion 27b, the release pin 28 for releasing the clamp slides (see FIG. 5), and the release pin 28 enters below the standby portion 27a. Sometimes, the upper chassis 25 can be lifted. The release pin 28 is driven in the left-right direction in FIG. 5 by a rack mechanism or the like that meshes with one of the various gears 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).
A stopper 31 is integrally provided at 0. As shown in FIGS. 2 and 8, the stopper 31 is formed to have a radius of curvature equal to or slightly larger than the radius of the large-diameter disk (L). The stopper 31 is formed by bending the resin 31 or the like at the above-mentioned curvature, and the concave surface of the stopper 31 is directed toward the turntable 23. 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 linear sliding holes 34 formed in the upper chassis 25, and the slider 30 can move linearly along the sliding holes 34.

The slider 30 has a pair of unlocking levers 35a and 35b rotatably supported by pins 36a and 36b, respectively. Each of the lock release levers 35a and 35b is formed in a V shape. Downward disc regulating projections 37a and 37b are attached to the tips of the long arms of the lock release levers 35a and 35b. Lock pins 38a and 38b are attached upward to the ends of the 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 are
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 respective turntable side ends of the auxiliary holes 41a and 41b. These lock grooves 42a and 42b
Are formed so as to approach each other. The 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 pair of lock pins 38
a and 38b so that the lock release levers 3 are close to each other.
5a and 35b are energized. The biasing force of the spring 39 is set to be very weak.

As shown in FIG. 8, when the slider 30 is moving to the left in the figure, a 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 as not to move rightward in the drawing, that is, in the depth direction of the passage. When the slider 30 is locked as described above, a pair of disk regulating protrusions 37a and 37b provided on the lock release levers 35a and 35b.
Are located on the left side of the figure with respect to the arc-shaped stopper 31. The center of the small diameter disk (S) is the turntable 2
When the position of the lock pin 38 substantially coincides with the center of
In a state in which a and 38b are locked by the lock grooves 42a and 42b, the pair of disc regulating projections 37a and 37b come into contact with the edge of the small-diameter disc (S). That is, the small-diameter disk (S) supplied on the turntable 23 has an arc-shaped stopper (31) at its edge.
At the center, at this time, the edge (b) and (c)
Both portions of the portion come into contact with the respective disc regulating protrusions 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). The distance between the edge of the disk passage shown in FIG. 3 and each of the disk regulating projections 37a and 37b is set to be smaller than the radius of the small-diameter disk (S).

When a large-diameter disk (L) is supplied, the edge of the disk (L) has a small-diameter disk (S).
Is larger than the radius of the disk (L), and the curvature of the concave surface of the stopper 31 substantially coincides with the radius of the disk (L). The disc regulating protrusions 37a and 37b are pushed rightward (in the depth direction of the passage) in the figure by the parts d) and e). As a result, the unlocking levers 35a and 35b rotate to open each other in opposition to the force of the spring 39, and the pair of lock pins 38a and 38b
From the lock grooves 42a and 42b. Therefore, the lock of the slider 30 is released, and the slider 30 can move rightward in the drawing. That is, a large-diameter disk (L)
Is supplied, the slider 30 is unlocked, and the stopper 31 is pushed in the depth direction by the disk (L).

An ejection lever 45 is provided on the upper surface of the upper chassis 25. This eject lever 45
Are rotatably supported by support pins 46. A long hole 45a is formed at the tip of the eject lever 45, and a pin 33 provided in the slider 30 passes through a sliding hole 34 formed in the upper chassis 25, and a long hole 45a is formed in the eject lever 45. 45a. The linear operation of the slider 30 along the sliding hole 34 is as follows.
The rotation of the eject lever 45 is interlocked.
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. 8, when the slider 30 is moving in the direction of the insertion opening, the eject lever 45 is urged counterclockwise by the reversing spring 47, and the slider 3 is moved.
0 is pressed to the left in the figure. The lock of the slider 30 is released, and the slider 30 is moved to the right in FIG.
When the stroke is moved about the stroke, the biasing direction of the reversing spring 47 is reversed, the eject lever 45 is biased clockwise, and the slider 30 is moved rightward in the figure (in the depth direction of the passage).
Pressed to.

An ejection drive lever 51 is provided on a lower surface of an end portion of the upper chassis 25, and is rotatably supported by the upper chassis 25 by a support pin 52. A drive pin 53 is provided at the end of the arm of the eject drive lever 51.
Are provided, and the driving pins 53 are connected to the upper chassis 25.
And project upward through a notch (not shown). The drive pin 53 is inserted into a long hole 45c formed in the eject lever 45. An operation piece 51 a is formed on the ejection drive lever 51, and the operation piece 51 a protrudes from a side edge of the upper chassis 25. The ejection drive lever 51 is driven by a drive mechanism (not shown), and the ejection lever 45 is driven to rotate.

As shown in FIG. 2, four optical detectors A, B, C, and D are provided in the insertion path of the disk. Each of the optical detectors A to D has a light emitting element and a light receiving element opposed to each other with the disk insertion path interposed therebetween. An aperture member for reducing the light to a constant diameter is provided. Among these optical detectors A to D, the first optical detector A is for detecting insertion and ejection of a disc,
It is located inside the insertion slot 12 and at the center of the disc insertion path. The second optical detector B is arranged at a position where the center of the small-diameter disk (S) or the large-diameter disk (L) is located above the turntable 23 so that any disk can be cut off. Have been. When the disk is not detected by the second optical detector B within a predetermined time after the insertion of the disk is detected by the first optical detector A, the small-diameter disk (S) is moved to a regular position. It is determined that it has not been inserted and has stopped at an intermediate position. The third optical detector C is disposed at a position off the edge of the disk (L) when the center of the large-diameter disk (L) is on the turntable 23. If the insertion of the disc is detected by the first optical detector A and the detection of the third optical detector is not switched within a predetermined time after the third optical detector C is blocked by the disk, the large diameter It is determined that the disc (L) is not inserted to the regular position. The third optical detector C is
It also has a function of detecting that the large-diameter disc (L) has been ejected. When the disc (L) moves to a position where the optical detector C is not shut off, the ejection operation is completed. Further, when the small-diameter disk (S) discharged to the position shown on the left side in the drawing is pressed again, the fourth optical detector D is blocked by the disk (C), whereby the pressing is performed. This is for detecting an operation. The fourth optical detector D is configured such that the leading end of the small-diameter disk (S) on the insertion side is the drive roller 14 and the opposing member 14a.
When the disc (S) is inserted up to the position sandwiched between the disc (S) and the disc (S), the disc (S) is provided at a position where it is blocked.

As shown in FIG. 6, each of the above optical detectors A to
The light reception output of D is detected by the detection circuit 61, and this detection signal is input to the microcomputer 62. The motor drive circuit 63 is controlled in accordance with the software input to the microcomputer 62, and the motor 17 for driving the drive roller 14 rotates in the normal direction (disc feeding direction) and in the reverse direction (disc discharging direction). Drive controlled.

Next, the operation of loading a disk in the disk player of the above embodiment will be described. When the disc is not being played, the release pin 28 shown in FIG. 5 has moved to the left. The release pin 28 abuts on the standby portion 27a of the regulating piece 27 formed on the upper chassis 25, and the upper chassis 25 is lifted via the regulating piece 27, whereby the clamper 26 separates from the turntable 23. I have. The eject lever 45 provided on the upper surface of the upper chassis 25 is provided with a reversing spring 47.
As a result, the slider 30 connected to the eject lever 45 and the pin 33 is pushed out toward the insertion opening 12. The pair of lock release levers 35a and 35b are pulled toward 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 regulating protrusions 37a and 37b are positioned so as to protrude toward the insertion opening 12 with respect to the stopper 31.

When the small-diameter disk (S) is inserted, the disk (S) is nipped and pulled by the driving roller 14 and the opposing member 14a. As shown in FIG. 2, a small-diameter disk (S)
When the disc (S) is inserted from substantially the center of the insertion slot 12, the disc (S) is held between the drive roller 14 and the facing member 14a in the state shown in FIG. 10A (the small diameter portion of the drive roller 14). It is sent. The disk (S) is fed through the center of the insertion passage due to the concave shape of the driving roller 14 and the facing member 14a. As shown in FIGS. 2 and 8, when the small-diameter disk (S) hits the substantially central portion of the stopper 31 at the tip (a), the (b) and (c) portions restrict the disk. The projections 37a and 37b are brought into contact with each other. That is, both the disc regulating protrusions 37a and 37b are not pushed in the direction of the stopper 31, so that the lock release levers 35a and
Lock pins 38a and 38b provided on 5b do not come off lock grooves 42a and 42b at the same time. Therefore, in this case, the slider 30 remains locked and does not move rightward in FIGS. 2 and 8.
Therefore, the center of the disk (S) is the turntable 2
Stay in the position above 3.

In the case of a small-diameter disc (S), the disc is not always inserted into the center of the insertion slot 12;
For example, as shown in FIG. 3, the disc (S) may be inserted with the disc (S) offset toward the side chassis 15a. Even in such a case, the disk (S) can be guided to the center position of the passage. This is because the drive roller 14 and the opposing member 14a are concave at the center as shown in FIG. 10A, so that one side edge of the small-diameter disk (S) is This is because, if the disk is held, the axis of the drive roller 14 is tilted and the balance of the feeding force is lost, and a force for returning the disk (S) to the center acts during the feeding operation. The disc regulating projection 3 which first hits the edge of the disc (S) which is further shifted further
The distance between 7a and the end of the passage is smaller 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 projection 37a, the disc (S) is rotated and fed so that the (a) portion thereof contacts the stopper 31 with the regulating projection 37a as a fulcrum. , The center of the disk is guided on the turntable 23. At this time, the edge of the disc (S) pushes the disc regulating projection 37a rightward in the figure, and this force causes the lock release lever 35a provided with the disc regulating projection 37a to rotate clockwise, and the lock pin 38
a comes off 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 from 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 to the case where the small-diameter disc (S) is fed in a direction opposite to the side shown in FIG.

The center of the disk (S) is the turntable 2
3 is recognized by a detection operation described later, 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 rightward.
Therefore, the release pin 28 separates from the restriction piece 27 and the release pin 2
8, the upper chassis 25 is lowered by the force of the spring, and the clamper 26 and the turntable 2
3 clamps the disk (S). In conjunction with this operation, the drive roller 14 descends and separates from the disk.

Next, the large-diameter disk (L) is
10 and fed by the drive roller 14 (see FIG. 10A), as shown in FIG. 8, the (d) and (e) portions of the edge of the disk (L) are almost simultaneously set in the disk regulating projection. This corresponds to 37a and 37b. Further, since the stopper 31 has a concave shape substantially along the outer periphery of the disk (L), the disk (L) hits along almost the entire surface of the stopper 31,
Therefore, both regulating projections 37a and 37b are pushed almost simultaneously in the direction of the stopper 31. Therefore, the regulating protrusion 37a
Release lever 3 provided with and 37b respectively
5a and 35b rotate in a direction to open each other against the spring 39, and lock pins 38 provided on the respective members.
a and 38b are almost simultaneously locked in the lock groove 42 of the upper chassis 25.
a, and the slider 30 is unlocked. Therefore, as shown in FIG. 9, when the disk (L) is further fed by the drive roller 14, the stopper 31 is pushed by the disk (L) and moved in the depth direction of the passage. After 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, whereby the slider 30 and the stopper 31 automatically move in the depth direction of the passage. Let me do. With the stopper 31 moved in the depth direction of the passage, the center of the disk (L) coincides with the position on the turntable 23.

When it is detected that the large-diameter disk (L) has been loaded, the upper chassis 25 descends as in the case of the small-diameter disk (S), and the disk (L) is moved to the clamper 2.
6 and the turntable 23. Further, the drive roller 14 moves down and separates from the disk.

In the disc ejection operation, first, in the case of a small-diameter disc (S), the upper chassis 25 moves up and the clamper 26 separates from the disc. Then, the drive roller 14 is moved up to a position where the drive roller 14 hits the disk and is reversed, and the disk (S) is ejected from the insertion slot. In the case of a large-diameter disk (L), the upper chassis 25 is lifted to release the clamp of the disk, and the eject drive lever 51 is driven clockwise. As a result, the eject lever 45 rotates counterclockwise, and when it rotates 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 port 12. Then, the drive roller 14 moves up and reversely rotates, and the disc is ejected 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 the detection operation will be described. In the following description, each of the optical detectors A to D indicates when the disk blocks light.
N, a case where the disk does not block light is described as OFF. FIG. 7 is a flowchart showing the detection operation by each optical detector and the control (control by software) by the microcomputer 62 based on this detection operation.

First, when the small-diameter disc (S) or the large-diameter disc (L) is inserted from the insertion slot 12 while the motor of the drive roller 14 is stopped, the first end of each disc is moved to the first position. The optical detector A is turned on (see (I) of FIG. 7), whereby the motor 17 is started, the drive roller 14 is rotated forward, and the disk is pulled in. Next, the discrimination as to 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 is performed as follows.

First, when a large-diameter disc (L) is inserted, the first optical detector A is turned on, and then the third optical detector C is turned on (see (II)). In the case of a 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
There are a case where it becomes N and a case where it remains OFF. In the microcomputer 62, a predetermined time is set by a timer or the like based on when the first optical detector A is turned on and the like, and it is determined whether or not the second optical detector B is turned on within this time. It is determined (see (III) and (III ')). Similarly, a predetermined time is set by a timer or the like on the basis of, for example, after the third optical detector C is turned on,
It is determined whether the third optical detector C is turned off within this time (see (IV)). When a large-diameter disc (L) is inserted and its center moves normally on the turntable, first, in (II), the optical detector C is turned on.
Then, in (III), the optical detector B is turned on within a predetermined time, and the optical detector C which has been turned on is turned off within a predetermined time. In addition to the switching between the two optical detectors B and C, it was confirmed that the first optical detector A was ON (see (V)), and the large-diameter disk (L) was loaded at the proper position. Is determined.

When a small-diameter disk (S) is inserted and its center moves to a regular position on the turntable, first, in (I), the first optical detector A is turned on, and then the third optical detector A is turned on. After the optical detector C is once turned on or without the optical detector C being turned on, (III)
Alternatively, in (III ′), the second optical detector B is turned on within a predetermined time. The optical detector B is turned on within a predetermined time, the third optical detector C is turned off within a predetermined time in (IV), and the first optical detector A is turned off in (V) or (V ′). When it is OFF, it is determined that the small-diameter disk (S) has been loaded at the proper position. The first optical detector A and the second optical detector B are arranged at positions where they cannot be simultaneously turned on by the small-diameter disk (S). Therefore, for example, when the small-diameter disc (S) is pulled in, only the first optical detector A is turned ON by the insertion path, and the first and third optical detectors A are turned on.
And C may both be turned on, but when the disk (S) advances and the second optical detector B is turned on, the first optical detector A and the third optical detector C are always turned off. , And at this time, the loading to the regular position can be confirmed.
That is, when the optical detector C is turned on after the optical detector A is turned on in (I) of FIG.
V) and (V) through the control steps (S)
Is determined to have reached the normal loading position. If the optical detector C does not turn on, it is determined that the small-diameter disk (S) has been loaded at the proper position through the control steps (III ') and (IV').

Here, a large-diameter disk (L) is inserted,
At the time of the feeding operation by the drive roller 14, there is a case where the disk (L) cannot be loaded to a regular position as shown in FIG. is assumed. If the large-diameter disc (L) is not loaded to the proper position,
The disk is positioned on the optical detector C of the optical disk C, and the optical detector C remains ON. Thus, the optical detector C
Is once turned on, and turned off within a predetermined time at (IV).
If not, the motor 17 driving the drive roller 14 is reversed (see (VI)), and the large-diameter disc (L) is once returned toward the insertion slot. When the large-diameter disc (L) comes off the second optical detector B and the optical detector B is turned off (see (VII)),
The driving roller 14 rotates forward again, and the feeding of the disk is resumed. If the optical detector C is turned off within a predetermined time, it is confirmed that the optical detector A is on, and it is detected that the large-diameter disk (L) is loaded at a proper position. If the optical detector C is not turned off within a predetermined time, the reverse rotation and the normal rotation of the drive roller 14 are repeated again.

In the case of a small-diameter disk (S), if it is not loaded at a proper position, (III) or (III)
′), The second optical detector B detects O within a predetermined time.
It does not become N. Therefore, in this case, as shown in (VIII), the motor 17 is driven to rotate in reverse by a command from the microcomputer 62, and the drive roller 14 is rotated in reverse to once return the small-diameter disk (S) toward the insertion slot.
Then, in step (IX), when the first optical detector A detects the disk, the drive roller 14 rotates forward again and the feeding of the disk is restarted. This control step (I
In X), ON after optical detector A is once OFF
Is determined. When the optical detector B is turned on and the first optical detector A is turned off within a predetermined time after resuming the feeding, it is detected that the small-diameter disk (S) has been loaded at the proper position. . If the optical detector B does not turn on within the predetermined time, the process returns to (VIII), and the drive roller 14 is rotated in the reverse direction. The feeding operation is repeated until it is loaded at 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 off in (V'), a small-diameter disc ( The disc is ejected on the assumption that a disc having a diameter different from the original diameter in S) is inserted, or that a disc-shaped foreign matter is inserted. Similarly, when the motor is reversed in (VIII), when the optical detector A is not turned on after being once turned off in (IX), for example, when the optical detector A is kept on, It is determined that the disc is not a small-diameter disc having an original diameter, and the disc is ejected.

When a small-diameter disc (S) is inserted, it is not always inserted from the center of the insertion slot.
In some cases, as shown by (β) in FIG. When the disc (S) is inserted in a skewed position as shown in FIG. 3, the disc (S) moves in the depth direction of the passage, and further proceeds slightly from the position indicated by (α), so that the small-diameter disc (S) is moved to one side. It is assumed that the vehicle stops in a state where it comes into contact with the protrusion 37a. In such a case, the disk feeding operation is repeated by the above-described reverse rotation of the drive roller 14 and the subsequent forward rotation, but in this disk feeding operation again, from the position indicated by (α) in FIG. It is returned and insertion is resumed from that position.
Therefore, as shown by (β), the insertion operation is repeated again from a condition better than the insertion at a position deviated from the beginning, that is, a position closer to the center. Therefore, each time the feeding is repeated, the probability that the small-diameter disk (S) can be loaded to the regular position is increased, and the small-diameter disk is surely loaded at the regular position.

Next, the ejection control of the disk is performed as follows. In the case of a large-diameter disc (L), the clamp is released by an eject operation and the motor 17
The drive roller 14 is rotated in the reverse direction to eject the disk (L). Then, the motor is stopped when the third optical detector C, which has been off until then, is once turned on and then further turned off. At this time, as shown on the left side of FIG.
The rear end of the disk (L) is located on the drive roller 14, and the disk (L) projects from the insertion slot 12. Next, in the discharging operation of the small-diameter disk (S), the motor 17 is driven for a certain time after the clamp is released by the ejecting operation. The small-diameter disk (S) stops at a position separated from the drive roller 14 after a predetermined time,
The tip of the small-diameter disk (S) projects from the insertion slot 12 and stops.

Further, when the ejected disc is pushed again, in the case of a large-diameter disc (L), it is confirmed by turning on the third optical detector C again, and the small-diameter disc (L) is checked. In the case of (S), confirmation is made by turning on the fourth optical detector D. By this confirmation, the drive roller 14 may be driven again to push out the disk in the direction of the insertion slot 12, or the drive roller 14 may pull in the disk again to set a standby state for the reproducing operation.

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

[0041]

[Effect of the Invention] As described above, in the present invention, the identification means is used.
If it is possible to distinguish between a large-diameter disc and a small-diameter disc
In both cases, a disc with a large diameter is discarded by the identification means within a predetermined time.
Or small discs cannot be identified or positioned
In this case, the disc can be ejected. Accordingly
The disk drive mechanism in the wrong orientation.
Problems such as pumping will not occur.

[Brief description of the drawings]

FIG. 1 is a front view showing an operation unit of a disc player according to an embodiment of the present invention;

FIG. 2 is a plan view of a disc player body according to an embodiment of the present invention;

FIG. 3 is a plan view of a disc player body according to an embodiment of the present invention;

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 circuit block diagram illustrating a control unit of the motor.

FIG. 7 is a flowchart of motor control,

FIG. 8 is a partial plan view of the disk drive unit showing the operation of the stopper and the lock release mechanism.

9 is a partial plan view of FIG. 8 unlocked by a large-diameter disk,

FIG. 10A is a front view showing a driving roller and a facing member for carrying in a large-diameter disc, and FIG. 10B is a front view showing a driving roller and a facing member for carrying in a small-diameter disc;

FIG. 11 is a plan view showing a conventionally used small-diameter disk adapter.

[Explanation of symbols]

 S Small-diameter disc L Large-diameter disc 12 Insertion slot 14 Drive roller 23 Turntable 25 Upper chassis 26 Clamp 28 Pin for releasing clamp 30 Slider 31 Stopper 35a, 35b Unlocking lever 37a, 37b Disc regulating protrusion 42a, 42b Lock groove 45 Eject Lever 47 Reverse spring 51 Intermediate lever 61 Driving lever 67 Driving pin A First optical detector B Second optical detector C Third optical detector D Fourth optical detector

Claims (2)

(57) [Scope of request for utility model registration] 1. A large-diameter disk and a small-diameter disk are loaded.
Possible carry-in rollers and carried by the carry-in rollers
Discriminating means for discriminating the diameter of the disc;
The step is provided when the disk of the one diameter is loaded.
A disk drive and a disk drive mechanism
The detection unit that is in the non-detection state when positioned at
Disk of one diameter is positioned on the disk drive
And another detecting unit that switches the detection state at a time, the former detecting unit detects the disk within a predetermined time after the former detecting unit detects the disk .
When the detection unit does not enter the non-detection state, or when the detection state of the other detection unit does not switch within a predetermined time ,
A system for reversing the carry-in roller and ejecting the disc
A disc player comprising a control unit . 2. A large-diameter disk and a small-diameter disk are loaded.
Possible carry-in rollers and carried by the carry-in rollers
Discriminating means for discriminating the diameter of the disc;
The stage is a large-diameter disk depending on the combination of its detection outputs.
And three detectors for identifying the three detectors.
The combination of the detection outputs of the two
The disc can be identified, and the three detectors
One of the detectors is a disc of any diameter.
Is also located at a position where insertion into the disk drive mechanism can be detected.
And used for insertion detection.
When the detecting unit detects the disk, the loading roller is demounted.
Forward in the disk loading direction, and
Within a predetermined time after a predetermined detection unit detects a disc,
A set in which the detection outputs of the three detection units identify a large-diameter disk.
If not, or if the two detectors
Within a predetermined time after the predetermined detection unit detects the disc
The detection outputs of the two detectors identify a small-diameter disk.
Reverse the carry-in roller when the combination does not
A disc player provided with a control unit for ejecting the disc.