JPH1074335A - Disk player - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate cleaning of an objective lens for reading by providing a member opposite to the lens with an opening part in a position opposite to the lens. SOLUTION: When a tray 10 as a part of a disk moving means is in a position before its movement, and a carriage 34 is in a home position, i.e., a position of repose before playing, the tray 10 is formed with the opening part 10d in a circular shape opposite to the objective lens 33a. Similarly, when the tray 10 and the carriage 34 are in their positions of repose before playing, a circular opening part to be opposite to the objective lens 33a is also formed in an upper surface of a housing, which is not shown in the figure. Consequently, dust, etc., stuck on the surface of the objective lens 33a can easily be cleaned without removing the tray 10 and the housing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc player.

[0002]

2. Description of the Related Art If dirt or dust adheres to a lens used for reading information from a disc, the reading of the information will be hindered. Therefore, it is necessary to clean the lens. However, this lens is often located relatively deep inside the player internal mechanism, and it is necessary to disassemble many mechanisms to perform cleaning.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a disk player capable of cleaning a lens relatively easily.

[0004]

According to the present invention, there is provided a disk player including a lens, reading means for reading information from a disk, and moving means for moving the reading means, wherein the moving means is located at a predetermined position. The member facing the reading means is provided with at least an opening facing the lens.

[0005]

The feature of the present invention is that the lens can be easily cleaned.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an on-vehicle auto-loading disc player as an embodiment of the present invention will be described with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 indicates the entirety of the auto-loading disc player. As shown in FIG. 1, a front panel 3 constituting a part of the housing 2 is provided with a slot 3a for inserting a disc 5 to be played, extending in the left-right direction. However, the left-right direction referred to here is a direction toward the front indicated by an arrow Y. Therefore, the arrow X direction in the figure indicates the left side,
The arrow Z direction is upward. In addition, the disk 5
This is a method of recording and reading signals using a laser beam, and has an outer diameter of about 12 cm. The front panel 3 is also provided with an operation button group 6 for operating the disc player, for example, for starting and ejecting the disc.

[0010] As shown in FIGS. 2 to 6, a chassis 7 as a support member is provided in the housing 2. The chassis 7 includes a main body 7a and a sub-chassis 7b fixed to a front end of the main body. As shown in FIGS. 1 and 12, the chassis 7 is supported by the housing 2 via four vibration isolating members 8 made of rubber or the like. However, FIG. 1 shows only the two left vibration isolating members 8. A tray 10 is provided on the chassis 7 so as to be movable in a direction parallel to a rotation surface of a turntable to be described later, in this case, in a front-rear direction (arrow Y direction and the opposite direction). 6, the tray 10 includes an L-shaped main body 10a and a side wall member 10b screwed to the right end of the main body. A bracket 12 is fixed to the left end of the chassis 7, and a left end of the tray 10 slides in a long hole 12a formed by extending a pin 10c protruding from the left end of the tray 12 in the front-rear direction. It is supported by freely engaging.

On the other hand, a pair of moving members 13 and 14 are arranged on both right and left sides of the chassis 7. Right moving member 14
Is a guide bar 15 fixed to the right end of the chassis 7 in the tray moving direction, that is, in the front-rear direction.
It is attached to the right end of the tray 10 which is slidably supported by. More specifically, the moving member 14 is supported by a long hole 14a formed in the moving member extending in the front-rear direction and slidably engaging a pin 10e projecting from the right end of the tray 10. It is. Also, the left moving member
Reference numeral 13 is located between the tray 10 and the bracket 12, and an elongated hole 13a formed in the moving member so as to extend in the front-rear direction is slidably engaged with a pin 10c provided at the left end of the tray 10. It is supported by joining. The right end of the tray 10 is slidably supported by the guide bar 15 at two support points separated in the tray moving direction, that is, in the front-rear direction. At the rear end of the tray 10, arms 17a
An interlocking shaft 17 to which 17b is fixed is provided extending in the left-right direction, and is rotatably supported by the tray 10. Pins 17c and 17 are provided on the inner surfaces of the tips of arms 17a and 17b.
d are projected from each other, and the pins are elongated holes 13b, 14b formed at the rear ends of the moving members 13, 14 so as to extend in the vertical direction.
Are slidably engaged with each other. At the right end of the chassis 7, a power transmission mechanism 19 composed of a plurality of gears rotatably supported is provided. A motor 20 is fixedly provided in front of the power transmission mechanism 19, and a worm 20a fitted on an output shaft of the motor meshes with a first gear 19a of the power transmission mechanism 19, as is particularly apparent in FIG. ing. The final gear 19b of the power transmission mechanism 19 is engaged with a rack 14d formed at the lower end of the left side surface of the moving member 14 in the moving direction of the moving member, that is, in the front-rear direction. The meshing position of the final gear 19b and the rack 14d is determined by the tray 10
Is slidably engaged with and supported by the guide bar 15.
It is near the midpoint of the support point.

The motor 20, the power transmission mechanism 19, and the interlocking shaft 17 including the arms 17a and 17b constitute driving force applying means for applying a driving force to the moving members 13 and 14.

Below the tray 10, a container 22 for holding the disk 5 is disposed at a position sandwiched between the moving members 13, 14. The container 22, the tray 10, and the moving members 13 and 14 form a disk carrying unit. Note that a protective film 23 made of felt or the like is attached to the disk carrying surface of the container 22 in order to avoid direct contact between the disk carrying surface and the disk 5. A total of four pins 22a are provided at both left and right ends of the container 22 so as to extend in the left-right direction. The container 22 has four elongated holes 10 formed by extending the pins 22a in the tray 10 in the vertical direction.
By slidably engaging f, the tray 10 is movably supported within a predetermined range in a direction perpendicular to the tray moving direction, that is, in a vertical direction. Pin 22 of container 22
a also moves through the moving members 13 and 14 after passing through the slot 10f.
Are slidably engaged with cam holes 13d and 14d formed respectively. The cam holes 13d and 14d are located in the disc insertion direction, that is,
22 is a tapered portion inclined in a direction away from the turntable to be described later, a horizontal portion extending to the rear in the disk insertion direction end, that is, the rear end of the tapered portion, and the tapered portion continuously to the rear end of the horizontal portion. And a tapered portion extending in parallel. In other words, the container 22 moves up and down with the movement of the moving members 13 and 14 in the front-rear direction.

Next, until the tray 10 reaches a predetermined position on a turntable to be described later, that is, a position where the rotation center of the disk 5 carried by the container 22 substantially coincides with the rotation axis of the turntable, the container 22 is moved to the tray. Locking / unlocking means for locking the tray 10 to the housing 2 while locking the tray 10 to the housing 10 and unlocking the locked state of the container 22 with the tray 10 when the tray 10 reaches the predetermined position will be described.

As shown in FIGS. 4 and 6, a recess 7c is formed at the right end of the main body 7a of the chassis 7. On the other hand, the right moving member 14 is formed with a cam groove 14e so that the position in the tray moving direction coincides with the position of the concave portion 7c when the tray 10 is at a predetermined position on the turntable. A lever 25 is swingably provided at the rear end of the tray 10, and a pin 26 which can engage with the concave portion 7c and the cam groove 14e protrudes from the swing end of the lever. That is, the pin 26 is selectively engaged with the concave portion 7c and the cam groove 14e. Further, the moving member 14 is formed so as to extend forward and continuously with the cam groove 14e and slidably engages with the pin 26 so that the moving member after the tray 10 reaches the predetermined position on the turntable. A long hole 14f that allows the movement of the hole 14 is formed.

The container 22 is locked to the tray 10 by the concave portion 7c, the cam groove 14e, the long hole 14f, and the pin 26 until the tray 10 reaches a predetermined position on the turntable. Container reaches 22
Lock / release means for releasing the locked state with the tray 10 and locking the tray 10 with respect to the housing 2 is constituted.

The lock / release means and the chassis 7
The tray 5, the container 22, the moving members 13 and 14, and the driving force applying means including the power transmission mechanism 19 and the motor 20 move the disk 5 inserted from the slot 3 a of the housing 2 to the playing position. That is, a disk transport mechanism for transporting the disk onto the turntable is configured.

Next, a description will be given of playing means provided in the housing 2 for playing a disk.

As shown in FIG. 6, on the lower surface of the chassis 7 which is a part of the disk transport mechanism, a support member 28 which is formed in a substantially U-shape as a whole is disposed. It is attached to the chassis 7 via four vibration isolating members 29 made of, for example,. Fixed to the support member 28 are two guide shafts 30a and 30b which extend in the front-rear direction in this case in parallel with the rotation surface of the turntable and function as guide means. Guide shaft 30
The sliders 31 formed in a substantially U shape are movably supported by a and 30b at both sides in the moving direction, that is, at both left and right ends. As shown in FIGS. 9 and 10, the slider 31 is provided with a screw 31a extending in the moving direction of the slider, that is, in the front-back direction, and the screw holds a rectangular parallelepiped case 33 rotatably. . That is, the case 33 rotates in a plane perpendicular to the slider moving direction. The case 33 includes an objective lens 33a for irradiating the information recording surface of the disk 5 with a laser spot light, and carries optical pickup means (not shown except for the objective lens 33a) for reading information from the disk. ing. Also, the slider 31 and the case 33 are
Collectively called 34.

Here, as shown in FIG. 2, for example, the tray 10 which is a part of the disk transport mechanism has the disk transport mechanism at the position before the disk transport (the state shown in FIG. 2) and the carriage. A circular opening 10d opposed to the objective lens 33a is formed when 34 is at the home position, that is, at the rest position before the performance. This opening
10d is provided for wiping dust and the like adhered to the surface of the objective lens 33a without removing the disk transport mechanism. Therefore, although not described in detail, it is a member constituting a part of the disk transport mechanism, and a member interposed between the tray 10 and the objective lens 33a when the disk transport mechanism and the carriage 34 are at the above-described pre-play position. Needless to say, an opening similar to the opening 10d is also formed. Also, as shown in FIG.
Is also formed with a circular opening 2a. Similarly to the opening 10d, the opening 2a is positioned so as to face the objective lens 33a when the disk transport mechanism and the carriage 34 are at the above-described rest position before the performance. A lid 2b that can close the opening 2a is fixed to the housing 2 with screws. By providing such an opening in the housing 2, the objective lens 33a can be cleaned without removing the housing.
Although not described in detail, it is also possible to adjust the light irradiation power of the optical pickup means through the openings 10d and 2a.

Before and after, as shown in FIGS. 9 and 10, the end of the slider 31 in the moving direction extends in a plane perpendicular to the moving direction of the slider,
31b is formed. The elongated hole 31b is provided corresponding to one end of the rotation of the case 33, and the circular head 35b of the biasing screw 35 into which the screw portion 35a is screwed into the case 33 is fitted into the elongated hole. As the name implies, the axial center of the screw portion 35a of the biasing screw 35 is offset from the axial center of the circular head 35b.
That is, by rotating the biasing screw 35, the case 33 is rotated slightly about the support screw 31a.

The biasing screw 35 and the circular head 35 of the biasing screw
The adjusting means for adjusting the rotational angle position of the case 33, that is, adjusting the optical pickup means (not shown) provided in the case in the so-called tangential direction, by the long hole 31b into which the b is fitted. Is configured. After the completion of such adjustment, it is fixed with the screw 31c.

As shown in FIG. 6 and FIG.
A screw shaft 37 disposed parallel to the guide shafts 30a and 30b is rotatably attached to both ends at the both ends. A motor 38 is provided in front of the screw shaft 37.
Is arranged, and the screw shaft 37 is rotatably driven by the motor via power transmission means including a pulley 39 and the like. As is particularly clear in FIG. 11, a leaf spring 41 is fixed to the slider 31 in a cantilever manner, and a free end of the leaf spring has a screw shaft 37.
A half nut 42 is fixedly screwed into the nut. The screw shaft 37, the motor 38, the power transmission means including the pulley 39, a leaf spring 41, a half nut 42,
The peripheral small members associated therewith allow the carriage 34
Is configured.

A turntable 45 is disposed at a position on the extension of the movement locus of the carriage 34 and sandwiched between the carriage and the drive mechanism for driving the carriage, and is fixed to the support member 28. ing. As is apparent from FIG. 7, the turntable 45 is directly driven to rotate by a spindle motor 46 as a drive source provided to carry the turntable. As shown in FIGS. 6 and 9, a cutout 33b into which a part of the turntable 45 and the spindle motor 46 facing the case 33 can be inserted is formed in the case 33 which is a part of the carriage 34. ing. When the carriage 34 is at the home position of the carriage, that is, the stationary position before the performance, the turntable 45 and the spindle motor 46 are inserted into the cutouts 33b.

As shown in FIGS. 7 and 8, an idler 47b rotatably supported by a holding mechanism 47a is brought into contact with the output shaft 46a of the spindle motor 46.
The output shaft is controlled by the holding mechanism 47a and the idler 47b.
A close contact means is provided for bringing the 46a and the bearing 46b supporting the close contact into close contact. Usually, a gap of about 10 μm is formed between the output shaft 46a and the bearing 46b.However, by providing the close contact means, this gap is corrected, and the rotation of the output shaft 46a, and therefore the turntable 45, is accurate and accurate. It will be smooth.

The support member 28 and the guide shaft 30
a, 30b, the carriage 34, the drive mechanism including the motor 38 (to drive the carriage 34), the turntable 45, the spindle motor 46, the close contact means including the idler 47b, and the peripheral devices associated therewith. The members constitute playing means for playing a disk.

Here, a method of attaching the support member 28 to the chassis 7 will be described in detail.

The four support points of the support member 28 with respect to the chassis 7, that is, the positions where the vibration isolating members 29 are disposed, are
Are provided at equal distances on an arc centered on the midpoint between the midpoint of the locus of movement of the center of gravity of the turntable 45 and the rotation axis of the turntable 45. The anti-vibration member 29 is provided to protect the playing means from external vibration such as body vibration of a vehicle equipped with the in-vehicle auto-loading disc player. By providing the anti-vibration member 29 at the supporting point and remarkably improving the anti-vibration effect. The reason why the support point of the support member 28 is set as described above is to take into account the change in the center of gravity of the playing means accompanying the movement of the carriage 34. Even if the support point of the support member 28 is provided at an equal distance on an arc centered on the center of gravity of the playing means when it is at the middle point, and the vibration damping member 29 is can get.

Next, the playing position, that is, the turntable 45
A clamp mechanism for clamping the disk 5 conveyed above will be described.

As shown in FIGS. 2, 3 and 6, a plate-like support member 51 is provided above the container 22 and at a position between the moving members 13 and 14. This support member
A total of four pins 51a are provided at the left and right ends of the 51, one pair at a time, extending in the left-right direction. The support member 51 is formed by extending each of the pins 51a on the tray 10 in the vertical direction.
By slidably engaging the two long holes 10g, the tray 10 is movably supported within a predetermined range in a direction perpendicular to the tray moving direction, that is, in a vertical direction. Support member
The 51 pin 51a is also inserted into the slot 10g of the tray 10 and the cam holes 13 formed in the moving members 13 and 14, respectively.
g and 14g are slidably engaged. Cam hole
13g and 14g are inclined linearly upward in the direction in which the support member 51 moves away from the turntable 45, that is, from the front to the rear. That is, the supporting member 51 moves up and down with respect to the turntable 45 as the moving members 13 and 14 move back and forth. Of the cam holes 13d, 13g and 14d, 14g formed in the moving members 13 and 14, the cam hole 13d, 14d that engages with the pin 22a of the container 22 is referred to as a first cam hole, and supports the first cam hole. The cam holes 13g and 14g that engage with the pins 51a of the member 51 are called second cam holes. In addition,
The total length of the first cam holes 13d and 14d in the disk insertion direction is substantially equal to the total length of the second cam holes 13g and 14g in the disk insertion direction.

The supporting member 51 is provided rotatably with a pressing member 52 which performs a disk clamping action in cooperation with the turntable 45. The position shown in FIG. 3 is referred to as a non-clamp position of the support member 51. Further, the support member 51 moves downward by a predetermined amount, and the pressing member 52
The position of the support member 51 when it comes into contact with the surface of the disk placed thereon is referred to as a clamp position. The support member 51 moves between the clamp position and the non-clamp position. Similarly, as shown in FIG. 3, the pressing member 52 has a magnet 52a formed in an annular shape, and forms a disk clamp by the magnetic force of the magnet. Also, a pressing member
52 and a supporting member 51 for rotatably supporting the same are made of a magnetic material such as a steel plate. When the supporting member 51 is at the above-mentioned unclamped position, the pressing member 52 is attracted to the supporting member 51 by the magnetic force of the magnet 52a. It has been made like that. FIG.
As shown in FIG. 5, a cushioning member 52b made of felt or the like is adhered to the upper surface of the pressing member 52, and when the supporting member 51 is at the non-clamping position, the supporting member 51 is vibrated or the like. The upper surface does not directly contact the housing 2. However, this buffer member 52
Is not limited to the upper surface of the pressing member 52, and may be provided on a part of the housing 2 facing the pressing member 52 when the support member 51 is at the unclamped position.

As can be seen particularly clearly in FIG.
A pair of left and right holding plates 54 and 55 are arranged on the lower surface of the pressing member 52 so as to sandwich the pressing member 52, and three pins 54a and 55
It is attached to the support member 51 movably in the left-right direction via a. At opposite portions of the holding plates 54 and 55, arc portions 54b and 55b to be inserted into a circumferential groove 52c (shown in FIG. 3) formed on the outer periphery of the pressing member 52 are formed. Two claws 54c and 55c are provided to be able to engage with the bottom surface of the circumferential groove 52c of the pressing member 52, respectively.

On the lower surface of the support member 51, holding plates 54, 55 are also provided.
A pair of left and right synchronizing plates 57 and 58 are disposed at the rear, and are rotatably attached to the support member 51 via pins 57a and 58a, respectively. Each sync plate 57,58 has 3 arms
57c, 57d, 57e and 58c, 58d, and 58e. A long hole 57f is formed at the tip of the arm 57c, and a pin 58f projecting from the tip of the arm 58c is slidably engaged. Also, the arm portions 57d, 58 protruding substantially forward.
Slots 57g and 58g are also formed at the tip end of d, and both slots are provided with pins 54e and 55e projecting from holding plates 54 and 55, respectively.
Are slidably engaged with each other. That is, the synchronizing plates 57 and 58 are configured to synchronize the operations of the holding plates 54 and 55. The holding plate 54 and the synchronization plate
57 is collectively referred to as a first positioning member 61, and a holding plate
The 55 and the synchronization plate 58 are collectively referred to as a second positioning member 62. That is, the pair of positioning members 61 and 62 are movably provided in a plane substantially perpendicular to the rotation axis of the pressing member 52, and engage with the outer periphery of the pressing member 52 at, for example, two points (claws 54c and 55c). You get. Further, each of the positioning members 61 and 62
Are biased by a coil spring 64 as biasing means in a direction in which the engaging portions of the holding plates 54 and 55, which are a part of both positioning members, with the outer periphery of the pressing member, that is, the claws 54c and 55c approach the outer periphery of the pressing member. Have been.

The positioning members 61 and 62 and the coil spring 64 constitute positioning means for positioning the pressing member 52 at a predetermined position on the support member 51. Further, the positioning means, the pressing member 52, and the support member
The playing position, that is, the disk 5 conveyed on the turntable 45,
Is configured.

The positioning means including the positioning members 61, 62 and the like not only position the pressing member 52 on the support member 51, but also move the disk 5 inserted from the slot 3a of the housing 2 to a predetermined position on the container 22. It also functions as a positioning means for positioning at a position. 2 and 6
As can be seen in FIG. 3, the positioning members 61 and 62 are arranged on both sides of the disc insertion path, and
(The disk holding portion is constituted together with the tray 10 and the moving members 13 and 14) and is movable in a plane substantially parallel to the disk holding surface. Pin members 54f, 55f, 57h and 58h project from the lower surfaces of the holding plates 54 and 55 and the synchronizing plates 57 and 58, which are constituent members of the positioning members 61 and 62, respectively. These pin members 54f, 55f, 57h and 58h extend substantially perpendicular to the disk carrying surface of the container 22, and act as engaging portions for engaging with the outer periphery of the disk 5. The coil spring 64 urges the positioning members 61 and 62 in a direction in which the pin members 54f, 55f, 57h and 58h approach the outer periphery of the disk.

Here, as shown in FIG. 6, each of the pin members 54f, 55f, 57h and 58h is formed with a taper whose diameter decreases toward the disk holding surface of the container 22. However, the pin member 57h is not shown. When loading or ejecting the disk, the disk 5 is clamped by the above-mentioned pin members. At the same time as the disk 5 is clamped, the disk 5 is held by the component force generated by the action of the taper of each pin member. It is pressed against the disk carrying surface.

Next, a mechanism for releasing the state of holding the disk by the positioning means will be described.

As shown in FIGS. 2 and 6, a small bracket 71 formed in an L shape is fixed to the upper end of the right moving member 14, and a pin member 72 is attached to the small bracket. It is protruding. The pin member 72 extends in the vertical direction, and the tray 10 is
When the center of rotation of the disk 5 carried by the container 22 that moves with the tray reaches a position substantially coincident with the rotation axis of the turntable 45, it is a component of the positioning means. The synchronizing plate 58 is disposed so as to engage with the front end of the claw 73 screwed to the tip of the arm 58e. That is, with the movement of the moving member 14 after the tray 10 reaches the predetermined position, the positioning members 61, 62
Is operated, the engagement state between the pin members 54f, 55f, 57h, 58h provided on the positioning members 61, 62 and the outer periphery of the disc,
That is, the disk holding state is released.

As is apparent from FIG.
A taper is formed in the pin member 72 provided to the taper so that the diameter of the pin 22 is reduced toward the direction in which the container 22 approaches the turntable 45, that is, downward. The positioning means (positioning member 6) for positioning the disk 5 at a predetermined position on the container 22.
1, 62, etc.) slides while abutting on the pin member 72 and reciprocates together with the container 22 in a direction substantially perpendicular to the tray moving direction. By being formed, the contact between the pin member and the positioning means becomes a point contact.
Therefore, the resistance due to the mutual contact becomes extremely small, and the disc loading and ejecting operations become smooth. Further, the positioning means receives a thrust by a component force generated by the action of the taper of the pin member 72.

Next, each mechanism that operates when the disk 5 is inserted from the slot 3a of the housing 2 will be described.

As shown in FIG. 13, a flexible material such as rubber is formed in a plate shape inside a disk insertion slot 3a formed in a front panel 3 constituting a front portion of the housing. A pair of flexible longitudinal members 76 and 77 are provided such that one ends in the short direction face each other and close the slot 3a on the main surface. Each of the flexible longitudinal members 76 and 77 is attached to the front panel 3 at a pair of fixing members 78 and 79 having an L-shaped cross section at the other end in the short direction, that is, the end on the non-opposite side. These flexible longitudinal members 76, 77 and fixing members 78, 79 allow the slot 3a
The closing means for closing is constituted.

The opposite ends of the flexible elongated members 76 and 77 are chamfered in an arc shape so that the sliding contact between the flexible elongated members and the disk 5 is smooth. Flexible portions 76a and 77a, which are formed thin and are particularly flexible, are provided in the vicinity of the opposed ends of the flexible longitudinal members 76 and 77, respectively.

The flexible longitudinal members 76 and 77 are conductive and are grounded, for example, via fixing members 78 and 79, respectively. By doing so, the static electricity can be removed from the disk 5 inserted from the slot 3a, and the dust adhering to the surface of the disk 5 due to the static electricity can be prevented from entering the housing 2. When the material of the flexible longitudinal members 76 and 77 is, for example, rubber, it is effective to mix carbon particles or the like as a method for imparting conductivity to the material.

As shown in FIGS. 2, 5 and 6, on the right side of the bracket 12 fixed to the left end of the chassis 7, a lever 85 extending substantially in the front-rear direction is arranged.
85a allows the bracket to be
It is rotatably attached to 12. The lever 85 rotates in conjunction with the moving member 13. On the other hand, a prevention member 86 is provided in front of the lever 85 so as to be movable in the vertical direction (the direction of the arrow Z and the opposite direction). A pin 86a protrudes from the left end of the prevention member 86, and the pin 86a is a long hole 85b formed at the front end of the lever 85.
Are slidably engaged with each other. The lever 85 and the preventing member 86 constitute a disk double insertion preventing means for preventing double insertion of the disk from the slot 3a. That is, with the rotation of the lever 85, the prevention member 86
By moving up and down, the prevention portion 86b provided on the prevention member crosses the slot 3a and prevents the disk from being inserted from the slot 3a.

The lever 85 is linked to the movement of the moving member 13, which is a component of the above-described disk transport mechanism. By using it as power for driving the insertion prevention means, a special drive mechanism for driving the disk double insertion prevention means is not required. Therefore, the size and cost of the entire player can be easily reduced.

As shown in FIGS. 2, 6, 14 (a) and 14 (c), the disk 5 inserted from the slot 3a is placed on the container 22 at the deep portion of the housing 2 and on the disk insertion path. A guide member 91 acting as a guide means for guiding to a predetermined position is arranged so as to face the disk carrying surface of the container 22, and is fixed to the lower surface of the tray 10, for example. The guide member 91 is formed by bending a steel plate, for example, and has a tapered portion 91a formed at the front end thereof so as to be inclined toward the disk insertion direction so as to approach the disk holding surface of the container 22.

As shown in FIG. 2, FIG. 6 and FIG. 14A, the disk 5 inserted from the slot 3a and positioned at the predetermined position on the container 22 is inserted into the rear end of the tray 10. A play (play) start switch 93 is provided so as to engage with the outer periphery of the disc when slightly pressed in the direction. However, the play start switch 93 is provided in front of the play start switch so as to be movable in the front-rear direction, and an intermediate member 94 to which a forward bias force is applied (also shown in FIG. 14B). And engages with the outer periphery of the disk.

As shown in FIG. 2, the main body 10 of the tray 10 is
A support shaft 96 extending in the up-down direction is fixedly provided on the lower surface of the right end of a. An arm 97 formed in a substantially U shape is rotatably attached to the support shaft 96 at a substantially central portion thereof. Pins 97a and 97b project from the lower surface of both ends of the arm 97, respectively, and the pin 97a on the left end side can be engaged with the outer periphery of the disk 5 positioned on the container 22. A switch holding member 99 that holds the detection switch 98 so as to be able to engage with the left end of the arm 97 is swingably attached to the support shaft 96. The switch holding member 99 is provided with a clockwise bias force in FIG. 2 by a coil spring (not shown). The detection switch
Arm 97 engaged with switch holding member 99 via 98
Also, a repulsive force in the same direction as the switch holding member 99 is given by the coil spring (not shown).

The above-mentioned support shaft 96, arm 97, detection switch 98, switch holding member 99 and peripheral small members related thereto constitute mechanical detection means for detecting that the disk 5 has been positioned on the container 22. Have been.
When the tray 10 moves backward by a predetermined distance from the position shown in FIG. 2, for example, and reaches a predetermined position, a pin 97b projecting from the right end of the arm 97 is provided near the rear end of the chassis 7. The cut-and-raised portion 7f is brought into contact with the cut-and-raised portion 7f.

As shown in FIGS. 6 and 11, a detection switch 101 for detecting that the carriage has returned to the home position, that is, the rest position before the start of the performance, is provided on the right side of the carriage. I have. This detection switch
101 is fixed to a support member 28 for supporting the carriage 34 and the like. A protrusion 31e protruding from a slider 31 which is a constituent member of the carriage 34 has an actuator 101a of the detection switch.
, A detection signal is issued.

As shown in FIG. 4, the right end of the chassis 7 is engaged with a part of the
A detection switch 103 for detecting that the vehicle has reached the forward movement limit position is fixed.

As shown in FIG. 6, at the right end of the chassis 7 and behind the detection switch 103, a part of the moving member 14 engages with the moving member 14 so that the moving member can move backward. A detection switch 104 for detecting that the position has been reached, that is, the completion of the disc loading and clamping, is fixed. However, this detection switch 10
4 is attached to the chassis 7 via a bracket 105.

Each signal generated from the operation button group 6, the play start switch 93, and the detection switches 98, 101, 103 and 104 is transmitted to a control unit (not shown) disposed at a predetermined position in the housing 2. . An operation signal sent from the control unit in accordance with each of these signals
And 38 and the spindle motor 46 operate at the timing described later.

FIGS. 19 and 20 show block diagrams of a control system. A host microcomputer (hereinafter abbreviated as a host microcomputer) 200 as a first control unit for controlling the entire system and at least an operation unit 201 are shown. And display unit 202
Sub-microcomputer (hereinafter abbreviated as sub-microcomputer) 203 as a second control section for controlling the microcomputer 200, and these microcomputers 200 and 203 are mounted on separate units, and a main power supply line 204, a constant voltage power supply line 205, It is connected via a communication line 206. Although the main power is supplied to the host microcomputer via the sub-microcomputer, it goes without saying that the main power may be supplied directly to the host microcomputer.

When the so-called accessory switch 207 of the vehicle responsible for turning on / off the main power supply is turned on / closed), the power supply voltage VDD stabilized by the stabilization circuit 208 rises instantaneously as shown in FIG. The output of the reset circuit 209 gradually rises with a predetermined time constant with respect to the power supply voltage (a) as shown in FIG. 21 (b), and resets the host microcomputer 200 when reaching the predetermined level V1. The host microcomputer 200 issues a control signal after a lapse of a predetermined time T from the reset time, and turns on a power switch 210 inserted in a power line between the two microcomputers to supply the power voltage VDD to the sub-microcomputer 203. As a result, the power supply voltage VDD supplied to the sub-microcomputer 203 and the reset circuit 211 rises as shown in FIG. The output of the reset circuit 209 gradually rises with a predetermined time constant with respect to the power supply voltage (c) as shown in FIG.
Reset 3.

By controlling the power supply of the sub-microcomputer 203 by the host microcomputer 200 in this way, the two microcomputers 200 and 203 can be kept in synchronization. Here, if this synchronization method is not adopted, it is necessary to provide a dedicated synchronization line for synchronizing the two microcomputers 200 and 203, which complicates the wiring structure and also takes time. . If the synchronization is separately performed with respect to the rise of the power supply voltage, both the reset circuits 209 and 211 need to be a complicated circuit having a configuration as shown in FIG. However, by controlling the power supply of the sub-microcomputer 203 by the host microcomputer 200, the reset circuit 211 on the sub-microcomputer 203 side can be a simple circuit having the configuration shown in FIG. 23, and the circuit configuration can be simplified as a whole. become.

The reset circuit 20 on the host microcomputer side
9 can detect the instantaneous interruption of the power supply voltage, so that the host microcomputer 200 and the sub-microcomputer 203 are reset at a certain timing even if there is an instantaneous interruption of the power supply voltage, as shown in FIG. You can do it.

As shown in FIG. 20, an address memory 212 and a backup memory 213 are built in the host microcomputer 200. When the main power supply is cut off, the backup power supply
It is supplied from 203. The backup power supply is made to have a constant voltage by the resistor R1 and the Zener diode ZD, and the communication line 206 between the sub-microcomputer 203 and the host microcomputer 200, and the host microcomputer 20 via the diode D1.
0 is supplied to the power supply terminal.

The play start switch 93 described with reference to FIGS. 2, 6 and 12 is a normally closed type switch, as shown in FIG. 19, when the tray 10 (see FIG. 4) has reached the forward movement limit position. That is, the detection switch 10 detects that the disc has been transported to the eject position.
Connected in series with 3. One end of these switch series connection circuits is connected to the input terminal of the sub-microcomputer 203, connected to the power supply VDD via the resistor R2, and the other end is grounded. When the disc is conveyed to the eject position after the performance, the detection switch 103 is closed, so that a low-level detection signal is supplied to the input terminal of the sub-microcomputer 203. On the other hand, when the disc is slightly pressed in the loading direction at the eject position, the play start switch 93 is opened, and when the disc is at the low level, it is detected that the input end of the sub-microcomputer 203 has transitioned to the high level and a replay command has been issued. Is done.

A loading mechanism (disk transport means) 214 for transporting the disk inserted from the slot 3a of the housing 2 (shown in FIG. 1) to the playing position, and a pickup 21
The main power is supplied to a pickup moving mechanism 216 for moving 5 in the radial direction of the disk via a main power switch 217 that is turned on / off by a host microcomputer 200. When the player system is used in combination with another source source, for example, a tape deck or a tuner, the host microcomputer 200 controls a loading mechanism when another source is input during a performance.
The main power switch 217 is turned off so as to stop the supply of the main power to the pickup 214 and the pickup moving mechanism 216. The loading mechanism 214 has the structure as described in FIGS. 4 and 6, and the pickup moving mechanism 216 has the structure as described in FIGS. 9 and 10.

In FIG. 20, program information including address information is recorded on the disk 5, and this recorded information is read by the pickup 215. The information read by the pickup 215 passes through a demodulation circuit 218, and the address information is detected by an address discrimination circuit 219 to determine the current position of the pickup 215. The latest address information is stored in the address memory in the host microcomputer 200.
Stored in 212. A focus detection circuit 220 constantly monitors whether or not the pickup is in focus on the basis of the output of the pickup 215, and generates an output when the focus is out of focus. When the output of the focus detection circuit 220 is generated, the host microcomputer 200
The pickup moving mechanism 216 is driven to return to the home position (the position where the detection switch 101 in FIGS. 6 and 11 is operated), and the focus is again controlled at the home position. Then, after the focus is taken again, the pickup 215 is moved to the immediately preceding address so that the performance is started again from the address immediately before the defocus stored in the address memory 212.

During the performance, the accessory switch of the car
When the main power supply of the system is turned off by turning off the power supply 207, the power supply cutoff detection circuit 221 detects this and generates an output. Due to the occurrence of this detection output, the latest address information stored in the address memory 212 is written to the backup memory 213. When the main power is supplied again, the performance starts from the address written in the backup memory 213.

The host microcomputer 200 further includes a counter 222 for sequentially counting expected address information to be moved next by the pickup 215 by performing a counting operation at regular intervals during the performance, and the latest address information and counter from the address memory 212. A detection circuit 223 for generating an output when the address information does not coincide with the expected address information from the reference circuit 222 is built in. The host microcomputer 220 uses the output of the detection circuit 223 to follow the recording track of the disk 5. It is determined that the information reading point 215 has jumped over the track. If it is determined that the track jumps, the pickup moving mechanism moves the information reading point of the pickup 215 to the expected address based on the output of the counter 222.
216 is driven and controlled.

When the information recorded on the disk 5 is a musical tone, the information between the final read address and the expected address is not read by moving the pickup 215 to the expected address as described above. Although this has no effect on the sense of hearing, if the recorded information is control information, it must be read.In such a case, by moving the pickup 215 to the last read address, it is necessary to read all the information accurately. Can be.

Reference numeral 224 denotes a temperature-sensitive element such as a thermistor, which is located in the housing 2 shown in FIG.
Is provided in the vicinity of. The temperature detection circuit 225 is a temperature sensing element 224
Is generated when the output exceeds a predetermined range, that is, when the temperature inside the housing 2 rises abnormally. The output of the temperature detecting circuit 225 is effective only when the disc is set at the playing position. That is, during the operation of the detection switch 104 (shown in FIG. 24) for detecting that the loading of the disk to the playing position is completed, the temperature detection circuit
When the output of 225 occurs, the host microcomputer
The control unit 200 turns off (opens) the main power switch 217 to stop supplying power to the mechanism, and waits until the output of the temperature sensing element 224 falls within the predetermined range. In addition to stopping the supply of power, for example, the display unit 202 also serves as the display unit 202, and when the loading of the disk is completed, the display unit 202 is switched to the temperature display mode and the temperature in the housing 2 rises abnormally. Can also be warned.

In FIG. 24, the semiconductor laser diode 22
Reference numeral 6 denotes a semiconductor laser diode which is built in the pickup 215 (shown in FIG. 20) and emits laser light for reading recorded information on the disk. The semiconductor laser diode is driven to be turned on by a lighting command signal output from the sub-microcomputer 203. The lighting time is restricted. That is, the above-mentioned lighting command signal becomes one input of the AND gate circuit 227, and the output of the detection switch 104 for detecting that the loading of the disc to the playing position is completed is supplied as the other input. The semiconductor laser diode 226 is illuminated and driven by the output of the AND gate circuit 227 via the drive circuit 228. Therefore, the semiconductor laser diode 226 is lit only in response to the lighting command signal when the disc is at the disc playing position.

Reference numeral 229 denotes a piezoelectric buzzer.
Reference numeral 229 is driven by a control signal issued from the sub-microcomputer 203 via the drive transistor Q1 to generate sound. The piezoelectric buzzer 229 for sound generation is also used as a detecting element for detecting vibration applied to the player body. That is, when the piezoelectric buzzer 229 is not driven to sound, the detection circuit 230 detects vibration applied to the player main body based on the output of the piezoelectric buzzer 229. Detection circuit
230 is an amplifier 231 that amplifies the output of the piezoelectric buzzer 229.
A filter 232 as an equalizer having frequency characteristics opposite to the frequency characteristics of the piezoelectric buzzer 229;
And a comparator 233 for comparing the output level of the signal with a reference level set corresponding to a vibration of a predetermined magnitude. The comparison output of the comparator 233 is supplied to the sub-microcomputer 203.

Here, in a player system having various known servo systems of focus servo, tracking servo, and tangential servo, particularly a tracking servo system for controlling the position of the information reading point of the pickup 215 with respect to the disk in the disk radial direction, As is generally known, against external vibrations applied from the outside,
By increasing the servo gain by expanding the servo band,
The influence of the disturbance is compressed, and the external vibration becomes strong. On the other hand, for internal disturbance that causes a phenomenon such as track skipping due to a large error signal generated in the servo system due to a disk scratch or defect, conversely, by increasing the servo band, the generated error signal increases. become weak. In a home player, external vibrations are not always applied, so the servo band can be determined by giving priority to the disk reading ability.However, in an in-vehicle player, there is always a disturbance, and the strength against vibration and the disk It is difficult to set a band that satisfies both the readability for scratches, fingerprints, defects, and the like.

Therefore, as described above, by detecting the vibration due to the disturbance and performing control to automatically switch the servo band based on the detection output, it is not necessary for the user to manually switch each time during operation, and the disk is not required. This makes it possible to improve the playability with respect to scratches and defects and the resistance against vibration. To switch the servo band, for example, set the characteristics of the equalizer inserted in the servo loop to several stages and select an appropriate characteristic, or prepare a plurality of equalizers with different characteristics, and set an appropriate equalizer. Done by choosing.

In the above embodiment, the vibration detecting means for detecting the external vibration applied to the player main body by the piezoelectric buzzer 229 is constituted. However, the vibration isolating member 8 (see FIG. 1) and the vibration isolating member 29 (see FIG. 6) May be formed of a conductive rubber member, and the vibration may be electrically detected based on the displacement of the rubber member.

As described with reference to FIG. 19, when the player system is used in combination with another source, if another source is input during the performance, the main power supply to the mechanism unit is performed. It is stopped, but when the disc enters the player and enters the waiting state,
There is a possibility that the disc is double-inserted by mistake. Therefore,
As shown in FIG. 24, as one of the display units 202, there is provided a disk set display unit 202a for displaying that the disk is set at the playing position, and a detection switch 104 for detecting that the disk has been loaded into the playing position. For example, by supplying main power to the disk set display unit 202a and driving the display unit 202a even when another source is input via the power switch 234, a warning can be issued to prevent double insertion of the disk. .

The life of the semiconductor laser diode 226 shown in FIG. 24 depends on the temperature, and when used at a high temperature, the life is remarkably reduced. Therefore, it is preferable that the semiconductor laser diode 226 is provided away from the heat source. For example, in a drive circuit for the objective lens 33a (shown in FIG. 9) of the pickup 215 as shown in FIG. 25, a coil 235 for driving the objective lens 33a is used.
Is a heat source that generates heat.Therefore, a pickup 215 including a semiconductor laser diode 226 and an adjustment volume 238 for adjusting the gain of an amplifier 237 is mounted on one of two units separated from each other, for example. By mounting the driving unit 236 on the other unit, the influence of heat on the semiconductor laser diode 226 can be suppressed.

Next, the operation of the in-vehicle auto-loading disc player having the above-described configuration will be described along with the performance procedure. 1 to 5 show an initial state before the performance of the disc player.

First, as shown in FIG. 1, the disk 5 is inserted into the housing 2 from the slot 3a. Disk 5
The pin members 54f provided on the positioning members 61 and 62 shown in FIG.
And 55f, and advance while pressing both positioning members 61, 62 to the left and right. When the center of rotation of the disk 5 exceeds the line connecting the axial centers of the left and right pin members 54f and 55f, the two pin members 54f and 55f are biased in such a way as to approach the outer periphery of the disk. 5 is drawn into the housing 2. At this time, the guide member 91 effectively guides the disk 5, and the disk 5 is positioned at a predetermined position on the container 22. Since the disk 5 is positioned with its outer periphery supported at four points by the four pin members 54f, 55f, 57h and 58h, the disk once positioned does not shift due to external vibration such as vehicle body vibration.

As shown in FIGS. 15A and 15B, the disk 5 is positioned on the container 22 and at the same time, the outer periphery of the disk 5 is engaged with the left end pin 97a of the arm 97. The arm is turned, for example, counterclockwise in FIG. Accordingly, the left end of the arm 97 is engaged with the detection switch 98 to operate the detection switch (the state shown in FIG. 15B). Then, the motor 20 starts rotating and the moving member 14 is driven rearward via the power transmission mechanism 19. However, as is clear from FIGS. 4 and 6, the tray
The pin 26 projecting from the swinging end of the lever 25 swingably provided on the lever 10 engages with the cam groove 14e formed in the moving member 14, so that the moving member 14 , So the container 22 is locked with respect to the tray 10. Therefore, only the moving members 14, 13 and the tray 10 and the container 22 are moved rearward by the rotation of the motor 20. In addition, the above-mentioned pin 26 is the cam groove 14e.
While sliding on the right end of the chassis 7.

At about the same time as the tray 10 and the container 22 are moved backward by a predetermined amount and the disk 5 is stored in the housing 2, it is protruded from the right end of the arm 97 as shown in FIG. Pin 97b is cut and raised part 7f of chassis 7
Abut. The engagement between the arm 97 and the detection switch 98 is maintained by the contact of the pin 97b with the cut-and-raised portion 7f. Therefore, the motor 20 continues to rotate, and the disk 5 is transported further backward. Along with this, the arm 97 is rotated counterclockwise in FIG. 15C by the cut-and-raised portion 7f, and the engagement state of the arm 97 with the disk 5 is released. In this state, the rotation center of the disk 5 substantially coincides with the rotation axis of the turntable 45.

At the same time as the engagement between the arm 97 and the disk 5 is released, the pin 26 separates from the cam groove 14e and enters the recess 7c formed in the chassis 7 as shown in FIG. . As a result, the tray 10 is locked with respect to the chassis 7 and therefore with the housing 2, and at the same time, the locked state of the moving member 14 with respect to the tray 10, and hence the locked state of the container 22 with respect to the tray 10, is released. Thus, the rearward movement of only the moving members 14 and 13 is continued to reach the state of FIG. That is, the pins 22a protruding from the container 22
Are cam holes 13d and 14 provided in the moving members 13 and 14, respectively.
d along with the container 22 as shown in FIG.
Moves downward while holding the disk 5. Therefore, the disk 5 is placed on the turntable 45. At this time, the disk carrying surface of the container 22 is separated from the disk 5, and the disk 5 can rotate together with the turntable 45. Also, by the backward movement of only the moving members 13 and 14,
A pin 51a protruding from the support member 51 of the clamp mechanism slides along the cam holes 13g and 14g formed in the moving members 13 and 14, respectively, and as shown in FIG. 52 approaches disk 5, and disk 5 is clamped. The vertical movement stroke of the support member 51 is approximately 8.5 mm, and the vertical movement stroke of the container 22 is approximately 6.5 mm. Container 22
Of the support member 51
This is because the cam holes 13d and 14d, in which the pins 22a protruding from the container 22 are slidably engaged, have a horizontal portion in the middle of the cam holes. This is the result.

When the moving member 14 reaches the rear limit position at the same time as the disk 5 is clamped, a part of the moving member is engaged with the detection switch 104 and the detection switch is operated as shown in FIG. Then, the motor 20 is stopped. Playing is possible in this state. The moving member 13
The lever 85 is rotated in conjunction with the rearward movement of the disk, and therefore the double insertion of the disk from the disk insertion slot 3a is prevented by the prevention member 86.

When the play start switch 6a of the group of operation buttons 6 arranged on the front panel 3 is pressed,
A performance start command signal is issued from the host microcomputer 200 shown in FIGS. 19 and 20, and in response to this, the turntable
The pickup 45 is rotated by the pickup moving mechanism 216 to start the movement from the home position. The home position of the pickup 215 is set at a predetermined position within the information recording range of the disk, preferably near the innermost position which is the recording start position. When the pickup 215 reaches the home position, it is shown in FIGS. Detection switch
101 activates.

At the time of performance, in FIG. 26, it is first determined in step 1 whether or not the pickup 215 is at the home position. If the pickup is in the home position, the pickup 215 is focused (step 2). Initiate a read operation. And step 3
In step (1), the information recording start position, that is, the TOC (Table of Contents) position, which is the lead-in area of the disc, is calculated based on the address information obtained by the pickup 215. The TOC records the number of songs recorded on the disc, the total absolute time, the playing time of each song, and the like. It is necessary to read the recorded information of the TOC before starting the performance. As a method of calculating the TOC position (target address) from the current address, for example, a method proposed by the present applicant in Japanese Patent Application No. 58-201994, that is, the closer to the target address, the more accurately the distance to the target address becomes. There is a method in which the pickup is moved by repeatedly calculating the distance to the target until the distance to the target address becomes a constant value by utilizing the obtained information.

When the TOC position is calculated in step 3, the pickup 215 is moved to the position (step 4). Then, the content of the TOC is read by the pickup 215 (step 5), and then the operation shifts to a performance operation. The closer the home position of the pickup 215 is to the TOC position, the quicker the operation can be shifted to the performance operation. In addition,
If it is determined in step 1 that the pickup 215 is not at the home position, the pickup is moved to the home position by the pickup moving mechanism 216 (step 6).

When the music to be played is specified,
After reading the TOC contents, in FIG. 27, the pickup is stepped in the direction of the designated address (the address of the designated music piece) by the initial set step amount in step S7. Then, it is determined in step 8 whether or not the current address is the specified address. If it is determined that the current address is not the specified address, it is further determined in step 9 whether or not the current address is larger than the specified address. If the address is larger than the specified address, the pickup 215 is forwarded in step 10 (FW
D) It is determined whether or not the disc has been sent in the direction from the inner circumference to the outer circumference. If the feed has been performed in the FWD direction, the process proceeds to step 11 to reverse the feed direction, further reduce the feed step amount (step 12), and then step
At 13, the pickup 215 is advanced by a step amount, and the process proceeds to step 8.

If it is determined in step 10 that the data has been sent in the reverse (REV) direction, that is, in the direction from the outer circumference to the inner circumference of the disk, it is determined whether the data has been sent in the previous step amount to exceed the minimum address in the information recording section of the disk. It is determined in step 14 whether or not it is exceeded. If it is determined that the address is exceeded, the feed step amount is reduced in step 15 and the process returns to step 14 again. If it is determined that the value does not exceed the value, the process proceeds to step 12.

If it is determined in step 9 that the current address is smaller than the designated address, it is determined in step 16 whether the pickup 215 has been sent in the REV direction.
If it is determined that the direction is, the process proceeds to step 11. FWD
If the direction is determined, it is determined in step 17 whether or not the maximum address in the information recording portion of the disk is exceeded when the data is sent in the previous step amount, and if it is determined that the address is exceeded, the process proceeds to step 18. The feed step amount is reduced and the process returns to step 17 again, and the above operation is repeated until it is determined that the maximum address is not exceeded. If it is determined that the value does not exceed the value, the process proceeds to step 12.

Note that the maximum and minimum addresses in the information recording section of the disc are calculated based on the read information of the TOC contents before the search, and are stored as the maximum and minimum times.
Also, in steps 14 and 17, the step amount up to that time is converted into time, the converted time is added (or subtracted) to the absolute time of the current address, and the addition (or subtraction) time is the maximum (or minimum). The determination as to whether or not the time is longer than the time determines whether or not the time exceeds the maximum (or minimum) address.

By adopting the above search method, even if an address near the maximum (or minimum) address is specified, the step amount is too large and the pickup 215 is not detected.
Does not jump out of the information recording section of the disk. FIG. 28 shows a return method in the case where the pickup 215 jumps out of the information recording unit for some reason or the pickup 215 jumps out of the mirror surface outside the information recording unit because the above search method is not employed. This will be described below based on a flowchart. Based on the output of the pickup 215, it is determined in step 19 whether or not the beam spot (information reading point) of the pickup 215 has jumped to the mirror portion where no information is recorded. If it is determined that the beam spot has jumped out, the feeding direction of the pickup 215 is reversed (step 20), and it is determined in step 21 whether the beam spot has entered the information recording section. If it is determined that the beam spot has entered, the number of recording tracks on the disk traversed by the beam spot is counted based on the output of the pickup 215 (step 22). If it is determined in step 23 that the counted number has reached a predetermined number, At that time, the reading operation by the pickup 215 is started.

According to the above-described return method, the beam spot can be reliably returned to the information recording section even when the disk is eccentric, and the return position can always be kept constant.

Next, a special case during a performance will be described with reference to the flowchart of FIG. If it is determined that the pickup 215 is out of focus during the performance (step 24), the pickup 215 is moved to the home position (step 25). If it is determined in step 26 that the pickup 215 has returned to the home position, The focus is again taken at the position (step 27), and thereafter the pickup 215 is moved to the final read address, that is, the address immediately before the defocus (step 28), and the performance is started again from that address. As described with reference to FIG. 20, the latest address information read by the pickup 215 is stored in the address memory 212,
When the focus is out of focus, the last read address stored in the address memory 212 is the address immediately before the focus is lost.

Also, the accessory switch 207 of the automobile
When it is determined that the main power supply has been cut off during the performance due to the turning off (shown in FIG. 19) (step 29), the ejecting operation by the loading mechanism 214 is started at step 30 (step 29).
30) Then, in step 31, it is determined whether or not a predetermined time has elapsed since the start of the ejecting operation. When it is determined that the predetermined time has elapsed, the ejecting operation is stopped and the apparatus enters a waiting state. Here, the predetermined time means that the container 22 shown in FIG. 18 rises by the start of the ejecting operation to carry the disc 5 on the turntable 45 and press the pressing member 52.
This is the time required for the disk 5 to be held between the two.

By the above operation, when the power is cut off, the disk 5 can be supported on the surface by the container 22, so that the deformation of the disk 5 can be prevented, and the disk 5 is taught by the container 22 and the pressing member 52. Therefore, the disk 5 does not move up and down due to vibration of the vehicle or the like.

The deformation of the disc can be prevented by performing the same operation not only when the main power supply is turned off due to the turning off of the accessory switch 207 but also when an abnormality occurs in the system during the performance. . Further, as described above, when used in combination with another source, when the other source is input during the performance, the main power supply to the mechanism is cut off and the disk 5 is taken into the main body. However, in this case, backup power may be supplied only to the loading mechanism 214 of the mechanical unit, and the same operation as described above may be performed, thereby similarly preventing deformation of the disk. You can do it.

When the performance is completed and the carriage 34 reaches the movement limit position, the carriage 34 and the turntable 45 are stopped, and at the same time, the motor 20 starts a reversing operation. Accordingly, the tray 10, the moving members 13, 14, the container 22, and the pressing member 52 return to the rest position before the performance by following a process completely opposite to the operation at the time of disc loading. Also, the carriage 34 is returned to the home position.

Thus, the disk 5 is recovered. When it is desired to replay the disk 5 which has been played once, the disc is slightly pushed in the direction of insertion of the disk, whereby the play start switch 93 shown in FIG.

Although the autoloading disc player is shown for use in a vehicle, it is needless to say that the autoloading disc player can be used indoors for home use.

[0093]

As described above, according to the present invention,
Since the member facing the reading means is provided with at least an opening facing the lens, the lens can be easily cleaned.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing the entirety of an in-vehicle auto-loading disc player according to the present invention.

FIG. 2 is a plan view of the internal structure of the autoloading disc player.

FIG. 3 is a front view of the internal structure of the autoloading disc player.

FIG. 4 is a left side view of the internal structure of the autoloading disc player.

FIG. 5 is a right side view of the internal structure of the autoloading disc player.

FIG. 6 is a perspective view of a main part of the internal structure.

FIG. 7 is a partially detailed view of the internal structure.

FIG. 8 is a partially detailed view of the internal structure.

FIG. 9 is a partially detailed view of the internal structure.

FIG. 10 is a partially detailed view of the internal structure.

FIG. 11 is a partially detailed view of the internal structure.

FIG. 12 is a partially detailed view of the internal structure.

FIG. 13 is a partially detailed view of the internal structure.

FIG. 14 is a partial detailed view of the internal structure.

FIG. 15 is a diagram for explaining the operation of the autoloading disc player.

FIG. 16 is a diagram for explaining the operation of the autoloading disc player.

FIG. 17 is a diagram for explaining the operation of the autoloading disc player.

FIG. 18 is a diagram for explaining the operation of the autoloading disc player.

FIG. 19 is a block diagram showing a control system.

FIG. 20 is a block diagram showing a control system.

21 is a waveform chart of each part (a) to (d) in FIG.

FIG. 22 is a circuit diagram of a reset circuit 209 in FIG.

FIG. 23 is a circuit diagram of a reset circuit 211 in FIG. 19;

FIG. 24 is a detailed view around the sub-microcomputer in FIG. 19;

FIG. 25 is a circuit diagram of a drive unit of the pickup.

FIG. 26 is a flowchart for explaining the operation of the control system shown in FIGS. 19 and 20;

FIG. 27 is a flowchart for explaining the operation of the control system shown in FIGS. 19 and 20;

FIG. 28 is a flowchart for explaining the operation of the control system shown in FIGS. 19 and 20;

FIG. 29 is a flowchart for explaining the operation of the control system shown in FIGS. 19 and 20;

[Explanation of symbols]

 2 Housing 2b Lid 3 Front panel 3a Slot 5 Disk 6 Operation buttons 6a Play start switch 8 Anti-vibration member 10 Tray 12, 105 Bracket 13, 14… Moving member 15… Guide bar 17… Interlocking shaft 19… Power transmission mechanism 20… Motor 20a… Warm 22… Container 31… Slider 34… Carriage 35… Bias screw 38… Motor 39 Pulley 45 Turntable 46 Spindle motor 52 Pressing member 61 First positioning member 62 Second positioning member 64 Coil spring 71 Small bracket 78, 79 Fixed member 86 Prevention member 91 Guide member 93 Play start switch 98, 101, 103, 104 Detection switch 200 Host microcomputer 203 Sub microcomputer 209, 211 Reset circuit 212 Address memo 213 ...... backup memory 214 ...... loading mechanism 215 ...... pickup 220 ...... focus detection circuit 224 ...... temperature sensitive device 226 ...... semiconductor laser diode 229 ...... piezoelectric buzzer

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Atsushi Kurosawa, 25-1, Nishimachi, Yamada, Kawaji-shi, Saitama Prefecture Inside Pioneer Corporation Kawagoe Plant (72) Inventor Akihiko Okamoto 25-1, Nishimachi, Yamada, Kawagoe-shi, Saitama Pioneer Corporation Kawagoe Factory

Claims (3)

[Claims] 1. A member including a lens, comprising: reading means for reading information from a disk; and moving means for moving the reading means, wherein the reading means faces when the moving means is at a predetermined position. A disc player characterized by having at least an opening facing the lens. 2. The disc player according to claim 1, wherein the predetermined position is a home position. 3. The disc player according to claim 1, further comprising a closing member capable of closing the opening.