JPS60254424A - On-vehicle disk player - Google Patents

Abstract

PURPOSE:To realize stable reproducing operation against external vibrations with an on-vehicle disk player, by supporting a disk reproducing mechanism with a vibration damping mechanism to a housing, and providing a means which moves a pickup to a prescribed address when track jumping occurs in addition to an electric means by means of a tracking servo system. CONSTITUTION:A chassis 7 is supported by a housing 2 through a vibration damping member 8. Especially, in the case of a player system equipped with a tracking servo system which makes positional control in the radial direction to a disk at the information reading point of a pickup 215, a counter 222 which makes the counting operation at a fixed cycle and successively outputs expected address information indicating the next moving address of the pickup 215 in the course of play and a detecting circuit 223 which always collates the latest address information from an address memory 212 to the expected address information from the counter 222 and, when they become discordant with each other, generates an output during the play, are provided in a host microcomputer 200, and thus, a pickup moving mechanism 216 is driven and controlled.

Description

TECHNICAL FIELD The present invention relates to a vehicle-mounted disc player, and more particularly to a vehicle-mounted disc player that plays a disc on which program information including address information is recorded.

BACKGROUND ART In this type of disc player, recorded information is read by the information reading point of the pickup following the recording track of the disc, but if vibration is applied to the player body from the outside, the pickup may The information reading point will skip over the recording track, making it impossible to obtain stable playback operation. In particular, when considering installation in an automobile that constantly vibrates, there is a high possibility that so-called truck jumping will occur frequently, and countermeasures are desired.

The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide an in-vehicle disc player that is strong against external vibrations applied to the player body and capable of stable playback operation.

The in-vehicle disc player according to the present invention includes mechanical means in which a disc reproducing mechanism is supported relative to a housing by an anti-vibration mechanism in a direction perpendicular to the surface of a disc set at a reproducing position, and an electrical means using a so-called tracking servo system. The player is characterized in that it is equipped with means for moving the pickup to a predetermined address when track skipping occurs, and that external vibrations applied to the player body can be dealt with by three means.

Embodiments Hereinafter, a vehicle-mounted autoloading disc player as an embodiment of the present invention will be described with reference to the accompanying drawings.

In the figure, reference numeral 1 indicates the entire autoloading disc player.

As shown in FIG. 1, a front panel 3 forming a part of the housing 2 is provided with a slot 3a extending in the left-right direction into which a disc 5 to be played is inserted. However, the left and right direction referred to herein refers to the front direction indicated by arrow Y. Therefore, the direction of the arrow X in the figure indicates the left side, and the direction of the arrow Z indicates the upward direction. In addition,
The disk 5 uses a laser beam to record and read signals, and has an outer diameter of about 12 cm. The front panel 3 is also provided with a group of operation buttons 6 for operating the disc player, such as play start and eject.

As shown in FIGS. 2 to 6, a chassis 7 serving as a support member is provided within the housing 2. As shown in FIGS. In addition,
The chassis 7 consists of a main body 7a and a sub-chassis 7b fixed to the 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, only the two vibration isolating members 8 on the left side are shown in FIG. A tray 10 is provided on the chassis 7 so as to be movable in a direction parallel to a rotating surface of a turntable (described later), in this case, in a front-back direction (direction of arrow Y and the opposite direction). As is particularly clear in FIG.
It is composed of a main body 10a formed in the shape of a wedge, 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 bin 10c protruding from the left end of the tray 10 slides into a long hole 12a formed in the bracket 12 by extending in the front-rear direction. It is supported by freely engaging.

On the other hand, a pair of moving members 13 are provided on both left and right sides of the chassis 7.
and 14 are arranged. The right moving member 14 is made of resin or the like, and is provided at the right end of the chassis 7 in the tray moving direction.
That is, it is attached to the right end of the tray 10, which is slidably supported by a guide bar 15 that is fixed and extends in the front-rear direction.

Specifically, the movable member 14 is supported by a long hole 14a formed in the movable member extending in the front-rear direction and slidably engaged with a bin 10e protruding from the right end of the tray 10. There is. Further, the left moving member 13 is located between the tray 10 and the bracket 12, and a long hole 13a extending in the front-rear direction is formed in the moving member, and a bin is provided at the left end of the tray 10. 100 in a slidable manner. In addition, tray 1
0 is slidably engaged with and supported by a guide bar 15 at two support points spaced apart in the tray movement direction, that is, the front-rear direction. An interlocking shaft 17 having arms 17a and 17b fixed to both ends thereof is provided at the rear end of the tray 10 and extends in the left-right direction, and is rotatably supported by the tray 10. Bins 17c and 17d project from the inner surfaces of the distal ends of the arms 17a and 17b, respectively, and each of the bins has lengths 113b and 14b formed at the rear ends of the movable members 13.14 and extending in the vertical direction. are slidably engaged with each other. A power transmission mechanism 19 consisting of a plurality of rotatably supported gears is provided at the right end of the chassis 7. A motor 20 is located in front of the power transmission mechanism 19.
As is particularly clear in FIG. 4, a worm 20a fitted to the output shaft of the motor meshes with the first stage gear 19a of the power transmission mechanism 19.

Further, the final stage gear 19b of the power transmission mechanism 19 is meshed with a rack portion 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 engagement position between the final stage gear 19b and the rack portion 14d is near the midpoint of the two support points at which the tray 10 is slidably engaged with and supported by the guide bar 15.

The above motor 20, power transmission mechanism 19, and arm 17
The interlocking shaft 17 including the movable members 13 and 17 constitutes a driving force applying means for applying a driving force to the moving members 13 and 14.

A container 22 carrying a disk 5 is arranged below the tray 10 at a position sandwiched by the moving members 13, 14. This container 22, tray 10, and moving member 13
and 14 constitute a disk holding section. Note that a protection 123 made of felt or the like is pasted on the disk holding surface of the container 22 in order to avoid direct contact between the disk holding surface and the disk 5. container 2
A total of four bins 22a, one pair each, are provided at both left and right ends of the bins 22a, extending in the left-right direction. The container 22 is configured such that each of the bins 22a is slidably engaged with four elongated holes 10f formed in the tray 10 to extend in the vertical direction. It is supported so as to be movable within a predetermined range. The bin 22a of the container 22 also has the long hole 10f.
After passing through the shell, the movable members 13 and 14 are respectively formed and slidably engaged with the tack holes 13d and 14d. The cam holes 13d and 14d have a tapered portion that slopes upward in the disk insertion direction, that is, from the front to the rear, that is, in a direction in which the container 22 moves away from the turntable, which will be described later, and an end of the tapered portion in the disk insertion direction, that is, the rear end. It is composed of a horizontal portion that continues and extends rearward, and a tapered portion that continues from the rear end of the horizontal portion and extends parallel to the tapered portion. That is, the container 22 is configured to move up and down as the moving members 13 and 14 move back and forth.

Next, the tray 10 is placed at a predetermined position on the turntable which will be described later, that is, the disc 5 supported by the container 22.
The container 22 is locked to the tray 10 until the center of rotation of the turntable reaches a position where it substantially coincides with the rotation axis of the turntable, and when the tray 10 reaches the predetermined position, the locked state of the container 22 with the tray 10 is locked. A lock that releases and locks the tray 10 to the housing 2.
The release means will be explained.

As shown in FIGS. 4 and 6, a recess 7c is formed in the right #ii portion of the main body 7a of the chassis 7. As shown in FIGS. On the other hand, a cam groove 14e is provided in the right moving member 14 so that the position in the tray movement direction coincides with the position of the recess 7c when the tray 10 is at a predetermined position on the turntable.
is formed.

A lever 25 is swingably provided at the rear end of the tray 10, and a pin 26 that can be engaged with the recess 7C and the cam groove 14e projects from the swinging end of the lever. That is, the pin 26 is adapted to selectively engage with the recess 7c and the cam groove 14e. In addition, the moving member 14
is formed so as to extend forward continuously from the cam groove 140, and is slidably engaged with the bin 26, allowing movement of the movable member 14 after the tray 1o reaches the predetermined position on the turntable. A long hole 14f is formed.

These recessed portions 7G, cam grooves 14e, long holes 14f and bins 2
6, the container 22 is locked to the tray 10 until the tray 1o reaches a predetermined position on the turntable, and when the tray 1o reaches the predetermined position, the lock state of the container 22 with the tray 1° is released. A locking/unlocking means for locking and locking the tray 1o with respect to the housing 2 is configured.

Further, the lock/release means, the chassis 7, and the tray 1
0, the container 22, the movable members 13, 14, and the driving force applying means consisting of the power transmission mechanism 19, the motor 20, etc., move the disc 5 inserted through the slot 3a of the housing 2 to the playing position, that is, the turn. A disk transport mechanism is configured to transport the disc onto the table.

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

As shown in FIG. 6, a support member 28 having a substantially U-shape as a whole is disposed on the lower surface of the chassis 7, which is a part of the disk transport mechanism, and is made of flexible rubber or the like. The chassis 7 is
is attached to. Two guide shafts 30a and 30b are fixed to the support member 28, which extend in parallel to the rotating surface of the turntable, in this case in the front-back direction, and serve as guide means. A slider 31 formed in a substantially U-shape is movably supported on the guide shafts 30a and 30b at both sides in the direction of movement, that is, at both left and right ends. As shown, the slider 31 is provided with a screw 31a extending in the direction of movement of the slider, that is, in the front-rear direction, and the rectangular parallelepiped case 33 is rotatably held by the screw. That is, the case 33 rotates in a plane perpendicular to the slider movement direction. Incidentally, the case 33 carries an optical pickup means (other than the objective lens 33a is not shown) for reading information from the disk, including an objective lens 33a that irradiates the information recording surface of the disk 5 with a laser spot light. ing. Further, the slider 31 and the case 33 are collectively referred to as a carriage 34.

Here, as shown in FIG. 2, for example, in the tray 10 forming a part of the disk transport mechanism, the disk transport mechanism is in the front disk transport position @ (the state shown in FIG. 2) and the carriage is A circular opening 10d is formed which faces the objective lens 33a when the lens 34 is at the home position, that is, the rest position before playing. This opening 10d removes dust etc. attached to the surface of the objective lens 33a.
This is provided for wiping the disk transport mechanism without removing it. Therefore, although not described in detail, this is a member that constitutes a part of the disc transport mechanism, and is a member that is interposed between the tray 10 and the objective lens 33a when the disc transport mechanism and carriage 34 are in the pre-performance position described above. Needless to say, an opening similar to the opening 10d is formed in the opening 10d. Further, as shown in FIG. 1, a circular opening 2a is also formed on the upper surface of the housing 2. Like the opening 10d, this opening 2a is also positioned to face the objective lens 33a when the disc transport mechanism and carriage 34 are in the above-described rest position before playing. Housing 2 also has
A lid 2b that can close this opening 2a is fixed with a screw. 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, 2a, etc.

However, as shown in FIGS. 9 and 10, the end of the slider 31 in the moving direction has a long hole 31 extending in the left-right direction in a plane perpendicular to the slider moving direction.
b is formed. The elongated hole 31b is provided corresponding to one end of rotation of the ball 33, and the elongated hole 31b is provided with a threaded portion 3.
5a is the circular head 3 of the offset screw 35 screwed into the case 33;
5b is fitted. As the name suggests, the axial center of the threaded portion 35a of the bias screw 35 is offset with respect to the axial center of the circular head 35b. That is, by rotating the biasing screw 35, the case 33 is rotated slightly around the support screw 31a.The biasing screw 35 and the circular head 35b of the biasing screw are fitted together. The elongated hole 31b constitutes an adjusting means for adjusting the rotational angular position of the case 33, that is, adjusting the so-called tangential direction of the optical pickup means (not shown) provided in the case. ing. Note that after this adjustment is completed, it is fixed with screws 310.

As shown in FIGS. 6 and 11, the support member 28 has a screw shaft 37 arranged parallel to the guide shafts 30a and 30b, which is rotatable at both ends.
installed. A motor 38 is arranged in front of the screw shaft 37.
7 is configured to be rotationally driven by the motor via a 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 the form of a cantilever, and a half nut 42 screwed onto the screw shaft 37 is fixed to the free end of the leaf spring. It is set up.

A drive mechanism for driving the carriage 34 is constituted by the screw shaft 37, the motor 38, the power transmission means including the pulley 39, the leaf spring 41, the half nut 42, and related peripheral small members. ing.

A turntable 45 is disposed on an extension of the movement locus of the carriage 34 at a position sandwiched between the carriage and the drive mechanism for driving the carriage, and is fixed to the support member 28. As is clear from FIG. 7, the turntable 45 is directly rotationally driven by a spindle motor 46, which is a drive source and is provided to support the turntable.

As shown in FIGS. 6 and 9, the case 33, which is a part of the carriage 34, has a notch 33b into which a portion of the turntable 45 and the spindle motor 46 facing the case 33 can be inserted. It is formed. When the carriage 34 is at its home position, that is, at its rest position before playing, the turntable 45 and spindle motor 46 are fitted into the notch 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.

These holding mechanism 47a and idler 47b constitute a close contact means for bringing the output shaft 46a and the bearing portion 46b that supports it into close contact. Output shaft 46a and bearing section 4
A gap of about 10 μm normally occurs between the output shaft 46a and the turntable 45, but by providing the above-mentioned close contact means, this gap is corrected and the rotation of the output shaft 46a, and therefore the turntable 45, becomes accurate and smooth. It is.

゛The above-mentioned support member 28 and guide shafts 30a, 3
0b, the carriage 34, the drive machine efe (driving the carriage 34) including the motor 38, the close contact means consisting of the turntable 45, the spindle motor 46, the idler 47b, etc., and peripheral small members related thereto. These constitute a playing means for playing a disc.

Here, the method for 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 member 29 is arranged are centered on the midpoint between the movement trajectory of the center of gravity of the carriage 34 and the rotation axis of the turntable 45. They are placed at equal distances on the arc.

The vibration isolating member 29 is provided to protect the performance means from external vibrations such as body vibrations of the automobile in which the in-vehicle autoloading disc player is mounted, and the supporting point of the supporting member 28 is as described above. By arranging the vibration isolating member 29 at the support point, the vibration isolating effect is significantly improved. The support point of the support member 28 is set as described above in consideration of the change in the center of gravity of the playing means as the carriage 34 moves. Even if the support points of the support member 28 are provided on an arc centered on the center of gravity of the playing means at the midpoint and equidistant from each other, and the vibration isolating member 29 is provided at the support points, a large vibration damping effect can be obtained. can get.

Next, a description will be given of the clamping mechanism that clamps the disc 5 transported to the performance position, that is, the turntable 45.

As shown in FIGS. 2, 3, and 6, a plate-shaped support member 51 is provided above the container 22 at a position sandwiched between the moving members 13 and 14. There are a total of four bottles 51a, one pair each at both left and right ends of the support member 51.
are provided extending in the left and right direction. The support member 51 is configured such that each of the bins 51a is slidably engaged with four long holes 10g formed in the tray 10 extending in the vertical direction, so that the support member 51 can move the tray 10 in a direction perpendicular to the tray movement direction.
That is, it is supported so as to be movable within a predetermined range in the vertical direction. The bin 51a of the support member 51 also supports the tray 10.
The elongated hole 10 (+) is inserted into the moving member 13.
．． The cam holes 13g and 14 are slidably engaged with the cam holes 13g and 140 formed in the cam holes 13g and 140, respectively.
( ) is linearly inclined upward in the direction in which the support member 51 moves away from the turntable 45, that is, from the front to the rear.In other words, the support member 51 turns as the movable members 13 and 14 move back and forth. It is designed to move up and down with respect to the table 45.

Note that the cam holes '13 formed in the moving members 13 and 14
6. Among 130, 14d and 14g, container 2
The cam holes 13d and 14d that engage with the second bottle 22a are
This is called a cam hole, and the pin 51a of the support member 51 is called a cam hole.
The cam holes 130 and 14g that engage with the second cam hole are referred to as second cam holes. Note that the total length of the first cam hole 136.14d in the disk insertion direction is approximately equal to the total length of the second cam holes 13g and 14(+) in the disk insertion direction.

The support member 51 is rotatably provided with a pressing member 52 that cooperates with the turntable 45 to perform a disk clamping action. Note that the position shown in FIG.
1 unclamped position. Further, the position of the support member 51 when the support member 51 moves downward by a predetermined amount and the pressing member 52 comes into contact with the surface of the disk placed on the turntable 45 is referred to as a clamp position. Support member 5
1 moves between the clamped position and the unclamped position. As also shown in FIG. 3, the pressing member 52 has a ring-shaped magnet 52a, and the magnetic force of the magnet forms a disk clamp.

Further, the pressing member 52 and the supporting member 51 that rotatably supports the pressing member 52 are made of a magnetic material such as a steel plate, and when the supporting member 51 is in the non-clamped position, the pressing member 52 is moved to the supporting member 51 by the magnetic force of the magnet 52a. It is designed to be absorbed by Further, as shown in FIG. 6, a buffer member 52 made of felt or the like is provided on the upper surface of the pressing member 52.
b is attached to prevent the upper surface of the suppressing member 52 from coming into direct contact with the housing 2 due to vibration of the supporting member 51 when the supporting member 51 is in the non-clamped position. However, this buffer member 52 is
2, but may be provided on a part of the housing 2 that faces the suppressing member 52 when the supporting member 51 is in the non-clamping position.

As is particularly clear in FIG. 2, a pair of left and right holding plates 54 and 55 are arranged on the lower surface of the support member 51, sandwiching the pressing member 52, and each holding three bottles 54a and 55.
Support member 51 is movable in the left and right direction via 5a.
is attached to. Each opposing portion of the clamping plates 54 and 55 has a circumferential groove 52C (third
(illustrated) are formed, and two claws 54c and 55C that can be engaged with the bottom surface of the circumferential groove 52C of the pressing member 52 protrude from the arcuate parts. ing.

A pair of left and right synchronizing plates 57 and 58 are also provided on the lower surface of the support member 51 behind the clamping plates 54 and 55, and are rotatably attached to the support member 51 via bins 57a and 58a, respectively. installed. Each synchronization plate 57.58 has 3 each
Book arm parts 57C, 57d, 57e and 58c,
58d and 58e. A long hole 57f is formed at the tip of the arm portion 57c, and a bottle 58f protruding from the tip of the arm portion 58c is slidably engaged therein. Further, elongated holes 57a and 58a are also formed at the tips of the arm portions 57d and 58d that protrude approximately forward, and both of the elongated holes are connected to the bins 54e that are protruded from the clamping plates 54 and 55, respectively.
and 55e, respectively, in a slidable manner. That is,
The synchronizing plates 57 and 58 are configured to synchronize the operation of the clamping plates 54,55. Note that the clamping plate 54 and the synchronizing plate 57 are collectively referred to as a first positioning member 61, whereas the clamping plate 55 and the synchronizing plate 58 are collectively referred to as a second positioning member 62. That is, these pair of positioning members 61 and 62 are provided movably in a plane substantially perpendicular to the rotational axis of the suppressing member 52, and each engages with the outer periphery of the pressing member 52 at, for example, two claws 54c, 55c). You get it.

Further, each of the positioning members 61 and 62 is biased in a direction in which the engaging portions of the clamping 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. It is biased by a coil spring 64 as a means.

The above-described positioning members 61 and 62 and the coil spring 64 constitute a 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 supporting member 5
1 and related peripheral small members constitute a clamping mechanism that clamps the disc 5 conveyed onto the performance position, that is, the turntable 45.

The positioning means including the above-described positioning members 61, 62, etc. not only positions the pressing member 52 on the support member 51, but also positions the disk 5 inserted through the slot 3a of the housing 2 at a predetermined position on the container 22. It also acts as a positioning means. As is clear from FIGS. 2 and 6, the positioning members 61 and 62 are arranged on both sides of the disk insertion path, and the container 22 (together with the tray 10 and the moving members 13, 14 constitutes a disk carrier) It is movable in a plane substantially parallel to the disk supporting surface of the disk.

The clamping plate 54 is a component of each positioning member 61, 62.
．． Bin members 54f, 55f, 57h and 58h project from the lower surfaces of 55 and synchronizing plates 57 and 58, respectively. These bin members 54f.

55f, 57h, and 58h extend substantially perpendicularly to the disk supporting surface of the container 22, and act as engaging portions that engage with the outer periphery of the disk 5. In addition, the coil spring 64 is attached to each bottle member 54f, 55f, 57h and 58h.
The positioning members 61 and 62 move toward the outer circumference of the disk.
is energized.

Here, as shown in FIG. 6, each bottle member 54f
, 55f, 57h, and 58h are formed with tapers that decrease in diameter toward the disk supporting surface of the container 22.

However, the bottle member 57h is not shown. Disc 5 when loading or ejecting the disc.
is held between the respective bin members, and at the same time as the disk 5 is held, the disk 5 is pressed toward the disk supporting surface of the container 22 by a component force generated by the taper action of each of the bin members. It is.

Next, a mechanism for releasing the disc clamping state by the above-mentioned positioning means will be explained.

As shown in FIGS. 2 and 6, a small bracket 71 shaped like a single character is fixed to the upper end of the right moving member 14, and the small bracket 71 has a bin member 71 fixed thereto.
2 is provided protrudingly. This bin member 72 extends in the vertical direction, and the tray 10 is connected to the turntable 4.
When the rotation center of the disk 5 carried by the container 22 that moves with the tray reaches a predetermined position on the tray 5, that is, a position where the rotation center of the disk 5 that is supported by the container 22 that moves together with the tray approximately coincides with the rotation axis of the turntable 45, the synchronization that is a component of the positioning means is activated. It is arranged so as to engage with the front end of a claw 73 screwed to the tip of the arm portion 58e of the plate 58.

That is, as the moving member 14 moves after the tray 10 reaches the predetermined position, the positioning members 61 and 62 are operated, and the bin members 54f, 55f, and 57h are set on the positioning members 61 and 62.

The engagement state between 58h and the outer periphery of the disk, that is, the disk clamping state, is released.

As is clear from FIG. 6, the container 22 is attached to the turntable 4 on the bin member 72 provided on the moving member 14
A taper is formed in which the diameter decreases in a direction approaching 5, that is, downward. The positioning means (positioning member 6
1.628) slides in contact with the bin member 72 and reciprocates together with the container 22 in a direction substantially perpendicular to the tray movement direction.As described above, the bin member 72 is tapered. Due to this, the contact between the pin member and the positioning means is a point contact. Therefore, the resistance caused by mutual contact becomes extremely small, and disc loading and ejecting operations become smooth. Further, the positioning means receives thrust from a component force generated by the taper action of the bottle member 72.

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

As shown in FIG. 13, inside the disk insertion slot 3a formed in the front panel 3 constituting the front part of the housing, a flexible material such as rubber is formed into a plate shape. A pair of flexible longitudinal members 76 and 77 are provided, which are arranged such that one end thereof in the hand direction faces each other and close the slot 3a at the main surface. Each of the flexible longitudinal members 76 and 77 is attached to the front panel 3 at the other end in the lateral direction, that is, at the non-opposing end thereof, by a pair of fixing members 78 and 79 having an angular cross-section.

These flexible longitudinal members 76, 77 as well as the fixed members 78.
79 constitutes a closing means for closing the slot 3a.

Each of the opposing ends of the flexible longitudinal members 76 and 77 is chamfered in an arc shape, so that the sliding contact between the respective flexible longitudinal members and the disk 5 is smooth. In addition, flexible portions 76a and 77a, which are formed thin and are particularly easy to bend, are provided in the vicinity of each opposing end of the flexible longitudinal members 76, 77, respectively.

Incidentally, the flexible longitudinal members 76 and 77 are electrically conductive and are grounded, for example, via fixing members 78 and 79, respectively. By doing this, static electricity can be removed from the disk 5 inserted through the slot 3a, and dust attached to the surface of the disk 5 due to static electricity is prevented from entering into the housing 2.

Note that when the material of the flexible longitudinal portions 076.77 is, for example, rubber, an effective method for imparting conductivity to the material is to mix carbon particles or the like.

As shown in FIGS. 2, 5, and 6, a lever 85 extending approximately in the front-rear direction is disposed on the right side of the bracket 12 fixed to the left end of the chassis 7, and a lever 85 is arranged on the right side of the bracket 12 fixed to the left end of the chassis 7.
5a, it is rotatably attached to the bracket 12 at approximately the center in the longitudinal direction. This lever 85
is adapted to rotate 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 (in the direction of arrow Z and the opposite direction). A bottle 86a is attached to the left end of the prevention member 86.
is provided protrudingly, and the bottle is slidably engaged with a long hole 85b formed in the front end of the lever 85.

These lever 85 and prevention member 86 constitute a disk double insertion prevention means for preventing double insertion of disks from the slot 3a. That is, the lever 85
As the prevention member 86 moves up and down in accordance with the rotation of
It is designed to cross the slot 3a and prevent the insertion of a disc from the slot 3a.

By the way, the lever 85 is designed to be linked to the movement of the moving member 13, which is a component of the disk transport mechanism described above, and in this way, a part of the power for transporting the disk is transferred to the disk double insertion prevention means. By using this as the power for driving the disk double insertion prevention means, a special drive mechanism for driving the disk double insertion prevention means is not required. Therefore, it is easier to downsize and reduce the cost of the entire player.

As shown in FIGS. 2, 6, 14(a), and (C), the disk 5 inserted through the slot 3a is inserted into the container 22 at the deep part of the housing 2 and on the disk insertion path. A guide member 91, which acts as a guide means for guiding to a predetermined position, is arranged to face the disk supporting 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 its front end so as to approach the disk supporting surface of the container 22 in the disk insertion direction.

As shown in FIGS. 2, 6, and 14(a), a disk 5 inserted through 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 start switch 93 is provided so as to engage the outer periphery of the disc when pushed slightly in the direction. However, this play start switch 93 is provided with an intermediate member 94 (also shown in FIG. 14(b)) which is provided in front of the play start switch so as to be movable in the front-rear direction and is provided with a forward bias. It engages with the outer periphery of the disk via.

As shown in FIG. 2, a support shaft 96 extending in the vertical direction is fixed to the lower surface of the right end of the main body 10a of the tray 10. An arm 97 formed in a substantially dogleg shape is rotatably attached to the support shaft 96 at substantially the center thereof. Pins 97a, 9 are provided on the lower surface of both ends of the arm 97.
7b are provided in a protruding manner, and the pin 97a on the left end side can engage 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 portion of the arm 97 is also swingably attached to the support shaft 96 . This switch holding member 99 is biased clockwise in FIG. 2 by a coil spring (not shown). The arm 97 engaged with the switch holding member 99 via the detection switch 98 is also given a repulsive force in the same direction as the switch holding member 99 by this coil spring (not shown).

The above-mentioned support shaft 96, arm 97, detection switch 98,
The switch holding member 99 and the peripheral small members related thereto constitute a mechanical detection means for detecting that the disk 5 is positioned on the container 22. Further, when the tray 1o moves backward by a predetermined amount from the position shown in FIG. 2 and reaches a predetermined position, the arm 97
A pin 97b protruding from the right end of the chassis 7 comes into contact with a cut-and-raised portion 7f provided near the rear end of the chassis 7.

As shown in FIGS. 6 and 11, the carriage 34
A detection switch 101 is provided on the right side of the player for detecting that the carriage has returned to its home position, that is, the rest position before the performance starts. This detection switch 1
01 is fixed to a support member 28 that supports a carriage 34 etc., and a slider 3 which is a component of the carriage 34.
A protrusion 31e protruding from the detection switch 1 engages with an actuator 101a of the detection switch to generate a detection signal.

As shown in FIG. 4, a detection switch 10 is provided at the right end of the chassis 7 to detect that the tray 10 has reached its forward movement limit position by engaging with a portion of the tray 10.
3 is fixed.

Further, as shown in FIG. 6, a movable member 14 is located at the right end of the chassis 7 and behind the detection switch 103.
A detection switch 1 detects that the movable member has reached the rearward movement limit position by engaging with a portion of the movable member, and therefore that disc loading and clamping have been completed.
04 is fixedly installed. However, this detection switch 104
is attached to the chassis 7 via a bracket 105.

Note that each signal emitted from the aforementioned operation button group 6, play start switch 93, detection switches 98, 101, 103, and 104 is transmitted to a control section (not shown) disposed at a predetermined position within the housing 2. Ru. The motors 20 and 38 and the spindle motor 46 operate at timings described later by operation signals sent from the control section in response to these signals.

A block diagram of the control system is shown in FIGS. 19 and 20, and the first 11i1JI1 controls the entire system.
A host microcomputer (hereinafter referred to as host microcomputer) 200 serves as a first part, and a sub microcomputer (hereinafter referred to as sub microcomputer) 203 serves as a second control unit that controls at least an operation unit 201 and a display unit 202.
These microcomputers 200 and 203 are mounted in units separated from each other and are connected via a main power line 204, a constant voltage power line 205, and a communication line 206. Although the main power is supplied to the host microcomputer via the sub-microcomputer, it is of course possible to supply the main power directly to the host microcomputer.

When the so-called accessory switch 207 of the automobile, which controls the on/off of the main power supply, is turned on or opened, the stabilizing circuit 20
The power supply voltage V(1) stabilized at 8 rises instantaneously as shown in FIG. It gradually rises, and when it reaches a predetermined level ■1, the host microcomputer 200 is reset.Host microcomputer 200
issues a control signal after a predetermined time T has elapsed from the reset time, and turns on the power switch 210 inserted into the power line between both microcomputers to supply the sub-microcomputer 203 with the power supply voltage Voo. As a result, the power supply voltage V(1) supplied to the sub-microcomputer 203 and the reset circuit 211 rises as shown in FIG. 21(C). (
It gradually rises at a predetermined time constant as shown in the figure below, and reaches a predetermined level■
2, the sub-microcomputer 203 is reset.

By controlling the power supply of the sub-microcomputer 203 by the host microcomputer 200 in this manner, it is possible to maintain synchronization between the two microcomputers 200 and 203. Now, if we consider the case where such a 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 increases work time. In addition, if synchronization is performed separately with respect to the rise of the power supply voltage, both the reset circuits 209 and 211 are connected to the 22nd
It is necessary to use a complex circuit as shown in the figure. However, the host microcomputer 200 causes the sub microcomputer 20 to
By performing the power supply control in step 3, the reset circuit 211 on the sub-microcomputer 203 side can be made into a simple circuit as shown in FIG. 23, and the overall circuit configuration can be simplified.

Note that the reset circuit 209 on the host microcomputer side can detect momentary interruptions in the power supply voltage, and as a result, as is clear from FIG. This allows the two to be reset and kept in sync.

The host microcomputer 200 has a built-in address memory 212 and a backup memory 213, as shown in FIG.
It has been supplied since 2003. The backup power supply is made constant voltage by resistor R1 and Zener diode ZD, and is used by sub microcomputer 203 and host microcomputer 200.
The power is supplied to the power terminal of the host microcomputer 200 via the communication line 206 between them and the diode D1.

The play start switch 93 explained in FIGS. 2, 6, and 12 is a normally closed type switch, and as shown in FIG. 19, when the tray 10 (see FIG. 4) reaches the forward movement limit position. That is, it is connected in series with a detection switch 103 that detects that the disk has been transported to the eject position. One end of these switch series connection circuits is connected to the input end of the sub-microcomputer 203 and also connected to the power supply V(1) via a resistor R2, and the other end is grounded. After the performance ends, when the disc is transported to the eject position, the detection switch 103
is closed, a low level detection signal is sent to the sub microcomputer 2.
It is supplied to the input terminal of 03.

On the other hand, when the disc is pushed slightly in the loading direction at the eject position, the play start switch 93 opens.
When the level is low, the input terminal of the sub-microcomputer 203 changes to a high level, and it is detected that a replay command has been issued.

A loading mechanism (which transports the disc inserted through the slot 3a of the housing 2 (first illustration) to the playing position
Main power is supplied to the disk transport means) 214 and the pickup moving mechanism 216 that moves the pickup 215 in the radial direction of the disk via a main power switch 217 that is controlled on/off by the host microcomputer 200. It has become. When this player system is used in combination with another source such as a tape deck or tuner, the host microcomputer 200 controls the main input to the loading mechanism 214 and pickup moving mechanism 216 when another source is input during performance. Control is performed to turn off the main power switch 217 to stop the supply of power. The loading mechanism 214 has a structure as described in FIGS. 4 and 6, and the pickup moving mechanism 216 has a structure as described in FIGS. 9 and 10, respectively.

In FIG. 20, program information including address information is recorded on a disk 5, and this recorded information is read by a pickup 215. pickup 2
The address information is detected by the address determination circuit 219 via the 1.1 demodulation circuit 218, and the current position of the pickup 215 is determined. The latest address information is then stored in the address memory 212 within the host microcomputer 200. 220 is pickup 2
This is a focus detection circuit that constantly monitors whether the pickup is in focus based on the output of No. 15, and generates an output when the pickup is out of focus. Host microcomputer 2
00 indicates that when the output of the focus detection circuit 220 is generated, the pickup 215 is placed at the home position (the position where the detection switch 101 in FIGS. 6 and 11 is activated).
The pickup moving mechanism 216 is driven and controlled to return to the home position, and the focus is controlled again at the home position. After refocusing,
The pickup 215 is moved to the immediately previous address stored in the address memory 212 so as to start playing again from the address immediately before the defocus.

During performance, when the main power of the system is cut off by turning off the accessory switch 207 of the automobile, the power cutoff detection circuit 221 detects this and generates an output. Upon generation of this detection output, the latest address information stored in address memory 212 is written to 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 22 that counts at a constant cycle during a performance and sequentially outputs information on the expected address to which the pickup 215 should move to the primary location.
2 and a detection circuit 223 that constantly compares the latest address information from the address memory 212 and the expected address information from the counter 222 and generates an output when they do not match, and the host microcomputer 220 uses the detection circuit 2
23, it is determined that the information reading point of the pickup 215 that follows the recording track of the disk 5 has skipped over that track. If it is determined that the truck has skipped, the information reading point of the pickup 215 is set to the counter 22.
The pickup moving mechanism 216 is driven and controlled to move the pickup to the expected address according to the output of step 2.

Furthermore, if the information recorded on the disc 5 is a musical tone,
As described above, even if the information between the final read address and the expected address is not read by moving the pickup 215 to the expected address, there is no effect on the auditory sense, but if the recorded information is control information, Since it is necessary to read the information, in such a case, by moving the pickup 215 to the final reading address, all information can be read accurately.

224 is a temperature sensing element such as a thermistor, and is provided within the housing 2 shown in FIG. 1, preferably near the pickup 215. The temperature detection circuit 225 detects when the output of the temperature sensing element 224 exceeds a predetermined range, that is, when the housing 2
Generates an output when the internal temperature rises abnormally. The output of this temperature detection circuit 225 is valid only when the disc is set at the playing position. That is, when the output of the temperature detection circuit 225 occurs during the operation period of the detection switch 104 (shown in FIG. 24) that detects that the loading of the disc to the performance position is completed, the host microcomputer 200 turns on the main power switch 217 in FIG. It is turned off (opened) to stop supplying power to the mechanical section, and remains in the timing state until the output of the temperature sensing element 224 falls within the predetermined range. In addition to stopping the power supply, for example, the display section 202 is also used, and when the loading of the disk is completed, the display section 202 is switched to display the temperature, so that the temperature inside the housing 2 has risen abnormally. You can also give a warning.

In FIG. 24, a semiconductor laser diode 226 is a semiconductor laser diode that is built in the pickup 215 (shown in FIG. 20) and emits a laser beam for reading recorded information on the disk. Although it is driven to turn on, the timing of its lighting 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, which detects the completion of transport of the disc to the playing position, is supplied as the other input. , the semiconductor laser diode 226 is driven to turn on by the output of the AND gate circuit 227 via the drive circuit 228. Therefore, the semiconductor laser diode 226 lights up in response to the lighting command signal only when the disc is in the disc playing position.

229 is a piezoelectric buzzer, and this piezoelectric buzzer 229 is driven by a control signal issued from the sub-microcomputer 203 via a drive transistor Q1 to generate sound. The piezoelectric buzzer 229 for producing this sound also serves as a detection element for detecting vibrations applied to the player body. That is, when the piezoelectric buzzer 229 is not driven to generate sound, the detection circuit 230 detects vibrations applied to the player body based on the output of the piezoelectric buzzer 229.

The detection circuit 230 includes an amplifier 231 that amplifies the output of the piezoelectric buzzer 229, a filter 232 as an equalizer having a frequency characteristic opposite to that of the piezoelectric buzzer 229,
It consists of a comparator 233 that compares the output level of this filter 232 with a reference level set corresponding to vibrations of a predetermined magnitude, and the comparison output of the comparator 233 is supplied to the sub-microcomputer 203.

Here, in a player system equipped with various servo systems such as a focus servo, a tracking servo, and a tangential servo, particularly a tracking servo system that controls the position of the information reading point of the pickup 215 in the disk radial direction, As described above, by widening the servo band and increasing the servo gain, the influence of the disturbance is compressed and the system becomes resistant to external vibrations. On the other hand, in order to prevent internal disturbances such as track skipping due to large error signals generated in the servo system due to scratches or defects on the disk, the servo band can be widened.
The generated error signal becomes larger and therefore weaker. With home players, external vibrations are not always applied, so
The servo band can be determined by prioritizing the disk reading ability, but in-vehicle players are constantly exposed to external disturbances, and the resistance to vibration, scratches on the disk, fingerprints, etc.
It is difficult to set a band that satisfies both the readability against defects and the like.

Therefore, as mentioned above, by detecting vibrations caused by external disturbances and automatically switching the servo band based on the detected output, the user does not have to manually switch the band each time during operation, and it also prevents damage to the disk. This improves playability against defects and increases resistance to vibration. To switch the servo band, for example, you can set the characteristics of the equalizer inserted in the servo loop to several levels and select the appropriate characteristic.
This is done by preparing a plurality of equalizers with different characteristics and selecting an appropriate equalizer.

In the above embodiment, the piezoelectric buzzer 229 constitutes the vibration detection means for detecting external vibrations applied to the player body, but the vibration isolating member 8 (see FIG. 1) and the vibration isolating member 2
9 (see FIG. 6) may be made of a conductive rubber member, and vibrations may be electrically detected based on the displacement of this rubber member.

As explained in FIG. 19, when this player system is used in combination with other sources, if the other sources are input during performance, the main power supply to the mechanical section is stopped. However, if the disc is loaded into the player and the player is out of stock, there is a possibility that the disc will be inserted twice by mistake. Therefore, as shown in FIG. 24, a disk set display section 202a is provided as one of the display sections 202 to display that a disk is set in the performance position, and detects that the disk has been carried into the performance position. By supplying main power to the disk set display section 2.2a and driving the display section 202a through the power switch 234, for example, even when other sources are input, by the output of the detection switch 1.4, double insertion of disks can be prevented. We can warn you to prevent it.

Note that the semiconductor laser diode 226 shown in FIG. 24 has a lifespan of 8! It is preferable to install it away from the heat source because it depends on the heat source and its life is significantly shortened when used at high temperatures. For example, in the drive circuit for the objective lens 33a (shown in FIG. 9) of the pickup 215 as shown in FIG. 25, the drive section 236 of the coil 235 for driving the objective lens 33a becomes a heat source that generates heat, so they are separated from each other. For example, a pickup 215 that includes a semiconductor laser diode 226, an adjustment volume 238 for gain adjustment of an amplifier 237, etc. in one of the two units.
By mounting the driving section 236, which serves as a heat source, on the other unit, the influence of heat on the semiconductor laser diode 226 can be suppressed.

Next, the operation of the in-vehicle autoloading disc player configured as described above will be explained along with the playing procedure. In addition,
1 to 5 show the initial state of the disc player before playing.

First, insert the disk 5 into the slot 3 as shown in FIG.
Insert into the housing 2 from a. At the same time as the disk 5 is inserted through the slot 3a, the disk 5 is inserted into the bin member 54 provided on the positioning member 61, 62 shown in FIG. 2, for example.
f and 55f, and advances while pushing both positioning members 61 and 62 left and right. When the center of rotation of the disk 5 crosses the line connecting the axes of the left and right bin members 54f and 55f, both bin members 54f, 55f are biased toward the outer periphery of the disk, so even if you release your hand, The disc 5 is drawn into the housing 2. Further, 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.

Note that the disk 5 has four bin members 54f and 55f.
, 57h, and 58h, the disk is positioned with its outer periphery supported at four points, so that once positioned, the disk will not shift due to external vibrations such as vehicle body vibrations.

As shown in FIG. 15 (ω, peak), at the same time as the disk 5 is positioned on the container 22, the outer periphery of the disk 5 engages with the left end pin 97a of the arm 97, and the arm For example, it is rotated counterclockwise as shown in FIG. 15(a). Therefore, the left end of the arm 97 engages with the detection switch 98 to operate the detection switch (the state shown in FIG. 15(b)). Then, the motor 20 starts rotating and the moving member 14 is driven backward via the power transmission mechanism 19. However, as is clear from FIGS. 4 and 6, the lever 2 swingably provided on the tray 10
5 is engaged with the cam groove 14e formed in the moving member 14,
The moving member 14 cannot be moved relative to the tray 10, so the container 22 is locked relative to the tray 10. Therefore, due to the rotation of the motor 20, the moving member 14
．． 13, tray 10, and container 22 are only moved rearward. Note that the pin 26 slides on the right end of the chassis 7 while being engaged with the cam groove 14e.

When the tray 10 and the container 22 move backward by a predetermined amount and the disk 5 is stored in the housing 2, almost at the same time, as shown in FIG. The bottle 97b that has been opened comes into contact with the cut-and-raised portion 7[ of the chassis 7. As the bin 97b comes into contact with the cut and raised portion 7f in this manner, the engagement state between the arm 97 and the detection switch 98 is maintained. Therefore, the motor 20 continues to rotate, and the disk 5 is further transported rearward. Along with this, the arm 97 is moved to the first position by the cut and raised portion 7f.
The arm 97 is rotated counterclockwise in FIG. 5(C), and the engagement state of the arm 97 with the disk 5 is released. In this state, the rotation center of the disc 5 is at the turntable 4.
It almost coincides with the rotation axis of No. 5.

At the same time as the engagement between the arm 97 and the disc 5 is released, the bin 26 leaves the cam groove 14e and enters the recess 7C formed in the shaft 11-shift, as shown in FIG. . This locks the tray 10 with respect to the chassis 7 and thus the housing 2, and at the same time locks the tray 10 with respect to the moving member 1.
4 and the locked state of the container 22 with respect to the tray 10 are released.

In this way, only the movable members 14 and 13 continue to move backward until the state shown in FIG. 17 is reached. That is, the bottle 22a protruding from the container 22 slides along the cam holes 13d and 14d provided in the moving member 13.14, respectively, and the first
As shown in FIG. 8, the container 22 moves downward while carrying the disk 5. Therefore, the disc 5 is placed on the turntable 45-L. At this time, the disk supporting surface of the container 22 separates from the disk 5, and the disk 5 becomes rotatable together with the turntable 45.

Also, by moving only the movable members 13 and 14 backward, the bottle 51a protruding from the support member 51 of the clamp mechanism is
By sliding along the cam holes 13 (l and 14g) formed in the moving members 13, 14, respectively, the pressing member 52 approaches the disk 5 together with the supporting member 51, as shown in FIG.
Disk 5 is clamped. Note that the movement stroke of the support member 51 in the vertical direction is approximately 8.5 mm, and
The movement stroke of the container 22 in the vertical direction is approximately 6
゜5IIll. The movement stroke of the container 22 is 21OIl longer than the movement stroke of the support member 51.
Although the size is smaller, the cam holes 13d and 14 are slidably engaged with the bin 22a protruding from the container 22.
This is a result of d having a horizontal portion in the middle of the cam hole.

When the movable member 14 reaches the rear limit position at the same time as the disk 5 is clamped, a part of the movable member engages with the detection switch 104 to operate the detection switch, as shown in FIG. Motor 20 is stopped. Performance is possible in this state. Note that the moving member 13
The lever 85 is rotated in conjunction with the rearward movement of the disk, and therefore, the prevention member 86 prevents double insertion of the disk from the disk insertion slot 3a.

Of the operation button group 6 arranged on the front panel 3,
When the play start switch 6a is pressed, a play start command signal is issued from the host microcomputer 200 shown in FIGS. 19 and 20, and in response to this, the turntable 45 rotates, and after that, the play starts. In order to start, the pickup 215 is driven by the pickup moving mechanism 216 and starts moving from the home position. In addition,
The home position of the pickup 215 is set at a predetermined position within the information recording range of the disc, preferably near the innermost circumferential position which is the recording start position, and when the pickup 215 reaches the home position, it is set as shown in FIGS. The detection switch 101 is activated.

When playing, in FIG. 26, it is first determined in step 1 whether the pickup 215 is at the home position, and if it is at the home position, the pickup 215 is focused (step 2), and the pickup 215 performs a reading operation. Start. Then, in step 3, based on the address information obtained by the pickup 215, the information recording start position, which is the lead-in area of the disc, is determined.
ntents) position is calculated. The TOC records the number of songs recorded on the disc, the absolute time, the playing time of each song, etc., and must read this TOC before starting a performance.
It is necessary to read the recorded information of C.

As a method of calculating 100 positions (target address) from the current address, for example, the applicant proposed
Using the method proposed in No. 01994, that is, the closer you get to the target address, the more accurate the distance to the target address can be obtained, repeatedly calculate the distance to the target until the distance to the target address reaches a constant value. There is a way to move the pickup.

When the 100 position is calculated in step 3, the pickup 215 is moved to the corresponding position (step 4). Then, the contents of the TOC are read by the pickup 215 (
Step 5): Next, the process moves to the performance operation. The closer the home position of the pickup 215 is to the 100 position, the more quickly the performance can begin. Note that if it is determined in step 1 that the pickup 215 is not at the home position, the pickup moving mechanism 216 moves it to the home position (step 6).

When a song to be played is specified, I; t1After reading the TOC contents, in FIG. Then, in step 8, it is determined whether or not the current address is the specified address, and if it is determined that it is not the specified address, then in step 9, the current address is moved further than the specified address (1) f). It is determined whether the result is X or not. If it is larger than the designated address, it is determined in step 10 whether or not the pickup 215 was being sent in the forward (FWD) direction, that is, from the inner circumference to the outer circumference of the disk. If the feed was in the FWDh direction, the process moves to step 11, the feed direction is reversed, and the feed step amount is further reduced (step 12).
, L, the pickup 215 is fed by a step amount in step 13, and the process moves to step 8.

If it is determined in step 10 that the data was being fed in the reverse (RE V') direction, that is, from the outer circumference to the inner circumference of the disc, it is determined whether or not the minimum address in the information recording area of the disc is exceeded if the data is fed in the previous step amount. If it is determined that the amount exceeds the amount, the feed step amount is decreased in step 15 and the process is repeated in step 14.
Return to , and repeat the above operation until it is determined that the minimum address is not exceeded. If it is determined that it does not exceed the limit, the process moves to step 12.

If it is determined in step 9 that the current address is smaller than the specified address, it is determined in step 16 whether or not the pickup 215 was being sent in the REV direction, and if it is determined that it is in the REV direction, the process moves to step 11. . FW
If it is determined that it is in the D direction, it is determined in step 17 whether or not the maximum address in the information recording section of the disk will be exceeded if the step amount is fed up to that point, and if it is determined that it is exceeded, step 18 is performed. Then, the step amount is decreased and the process returns to step 17, and the above operation is repeated until it is determined that the maximum address is not exceeded. If it is determined that the distance is not exceeded, the process moves to step 1.2.

Note that the maximum and minimum addresses in the information recording section of the disc are calculated in advance based on the read information of the TOC contents before the search, and are stored as the maximum and minimum times. In addition, in steps 14 and 17, the amount of steps up to that point is converted to 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) above. ) By determining whether it is greater than time,
It is determined whether the maximum (or minimum) address is exceeded.

By using the above search method, the maximum (or minimum)
Even if an address near the address is specified,
This prevents the pickup 215 from jumping out of the information recording area of the disk due to the step amount being too large. Furthermore, if the pickup 215 jumps out of the information recording section for some reason, or if the pickup 215 jumps out onto the mirror surface outside the information recording section because the above search method is not adopted, FIG. 28 shows how to recover. This will be explained below based on the flowchart.

Based on the output of the pickup 215, the pickup 21
It is determined in step 19 whether or not the beam spot (information reading point) No. 5 has projected onto a mirror surface 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 it has entered, the pickup 21
Step 22) counts the number of recording tracks on the disk that the beam spot traverses based on the output of step 5. When it is determined in step 23 that the counted number has reached a predetermined number, the reading operation by the pickup 215 is started from that point. Start.

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

Next, a special case during a performance will be explained based on the flowchart of FIG. 29.

When it is determined that the pickup 215 is out of focus during performance (step 24), the pickup 215 is moved to the home position (step 25), and when it is determined that the pickup 215 has returned to the home position in step 26, the pickup 215 is moved to the home position (step 25). The focus is taken again at jQ'lJ (step 27), and then the pickup 2 is carried out to the final read address, that is, the address immediately before the focus is removed.
15 (step 28), and the performance is restarted from that address. As explained in FIG. 20, the latest address information read by the pickup 215 is stored in the address memory 212, and when the focus is out, the last read address stored in the address memory 212 is the address immediately before the focus is out. It becomes.

Further, when it is determined that the main power has been cut off during the performance due to turning off the accessory switch 207 (shown in FIG. 19) of the automobile (step 29), the ejecting operation by the loading mechanism 214 is started in step 30 (step 3
0), further in step 31 it is determined whether a predetermined time has elapsed since the start of the eject operation, and when it is determined that the predetermined time has elapsed, the eject operation is stopped;
It becomes a period state. Here, the above-mentioned predetermined time is a state in which the container 22 shown in FIG. 18 rises upon the start of the eject operation, carries the disc 5 on the turntable 45, and clamps the disc 5 between it and the pressing member 52. This is the time it takes to reach this point.

As a result of the above operations, when a power outage occurs, the disk 5
Since the container 22 can support the disc 5 on its surface, deformation of the disc 5 can be prevented, and the container 22 and the pressing member 52 can
Since the disk 5 is taught by the above, the disk 5 does not move up and down due to vibrations of the car or the like.

Note that deformation of the disc can be prevented by performing the same operation not only when the main power is cut off by turning off the accessory switch 207, but also when an abnormality occurs in the system during performance. In addition, as mentioned above, when used in combination with other sources,
When another source is input during a performance, the main power supply to the mechanism section is cut off and the disc 5 is taken into the main body, but in this case, only the loading mechanism 214 of the mechanism section is backed up. to supply power,
The same operation as above may be performed, and thereby the deformation of the disk can be similarly prevented.

When the performance ends and the carriage 34 reaches the movement limit position, the carriage 34 and the U-turntable 45 are stopped, and at the same time, the motor 2o starts a reversing operation. Therefore, the tray 1o, the movable members 13, 14, the container 22, and the pressing member 52 are returned to the rest position before playing by following a process that is completely opposite to the operation at the time of disc loading described above. Further, the carriage 34 is also returned to the Baum position.

In this way, the disk 5 is recovered.

Incidentally, when it is desired to play again the disc 5 which has been played once, the play start switch 93 shown in FIG. 2 is activated by slightly pushing the disc in the disc insertion direction, and the play is performed again.

Although the autoloading disc player is shown for use in a vehicle, it goes without saying that it can also be used indoors for home use.

Effects As explained above, according to the present invention, the mechanical means and tracking nerve system support the disk playback mechanism with respect to the housing by the vibration isolation mechanism in the direction perpendicular to the surface of the disk set at the playback position. In addition to electrical means such as An in-vehicle disc player that is resistant to vibration and capable of stable playback operation can be obtained. In car-mounted disc players, there is a strong demand for miniaturization, especially in the width direction (horizontal direction). However, by providing a means to cope with track jump,
This makes it possible to obtain a disc player that is resistant to external vibrations in the lateral direction.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view showing the entire in-vehicle autoloading disc player according to the present invention, FIG. 2, FIG.
4 and 5 are a plan view, a front view, a left side view, and a right side view of the internal structure of the autoloading disc player, FIG. 6 is a perspective view of the main parts of the internal structure, and FIGS. Figure 14(a). (b+, +c+ are partial detailed views of the internal structure, Fig. 15 (
Field. (b+, (C) to FIG. 18 are diagrams for explaining the operation of the autoloading disc player. FIGS. 19 and 20 are block diagrams showing the control system.
The waveform diagrams of each part (ω~+d> in the figure, FIGS. 22 and 23 are the reset circuits 209 and 21 in FIG. 19)
1, FIG. 24 is a detailed diagram of the surroundings of the sub-microcomputer in FIG. 19, FIG. 25 is a circuit diagram of the pickup drive section, and FIGS. 26 to 29 are shown in FIGS. 19 and 20. FIG. 3 is a flowchart for explaining the operation of the control system. Explanation of symbols of main parts 2...Housing 2b...Lid 3...Front panel 3a...Slot 5...Disc 6
......Operation button group 6a...Play start switch 8...
・Vibration isolation member 10...Tray 12.105...
... Bracket 13.14 ... Moving member 15 ... Guide bar 17 ... Interlocking shaft 19 ... Power transmission mechanism 20 ...・Motor 20a... Worm 22... Container 31... Slider 34... Carriage 35... Offset 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...Fixing member 86...Preventing member 91...Guiding member 93...Play start switch 98.101
,103.104...Detection switch 200...Host microcomputer 203...Sub microcomputer 209.211...Reset circuit 212...
... Address memory 213 ... Backup memory 2
14...Loading mechanism 215...Pickup 220...Focus detection circuit 224...
... Temperature sensing element 226 ... Semiconductor laser diode 229 ...
...Piezoelectric buzzer applicant Motohiko Fujimura, agent of Pioneer Corporation, patent attorney Motohiko Fujimura Book 7 Zujuku 8 Kyohata 12 Kun 11 Hata 73 Zuson, 24 Leap also 25 Concave Ministry 52 Otsu Zuden, 28 Zubo 2'? U Continued from page 1 @ Inventor Akihiko Okamoto Factory procedures? Hoshosho (method) 1. Display of the case 1982 Patent Application No. 111842 2 Name of the invention In-vehicle disc player 3 Person making the amendment Relationship to the case Patent applicant Address 1-4-1 Meguro, Meguro-ku, Tokyo Name (5)
01) Pioneer Co., Ltd. 4, Agent 104 Address: 3-10-9-6, Ginza, Chuo-ku, Tokyo Subject of amendment: Engraving of drawings 7: Details of amendment: As attached.

Claims (2)

[Claims] (1) A disk playback mechanism including a pickup that reads program information including address information from a disk on which the program information is recorded and a pickup moving means that moves the pickup in the disk radial direction, and a disk playback mechanism that moves the disk playback mechanism to a playback position. a vibration isolation mechanism that supports the housing in a direction perpendicular to the surface of the disk set in the disk; a tracking servo system that controls the position of the information reading point of the pickup in the disk radial direction with respect to the disk; and control means for constantly comparing expected address information read by the pickup with the latest address information read by the pickup, and controlling the pickup to move to a predetermined address when a discrepancy occurs. player. (2) The in-vehicle disc player according to claim 1, wherein the predetermined address is an expected address or a final read address at the time of mismatch.