JPS60254465A - On-vehicle disk player - Google Patents

Abstract

PURPOSE:To realize stable reproducing operations which are tolerable to external vibration exerted on the main body of an on-vehicle disk player, by always comparing expected address information which is updated at a fixed cycle and the latest address information read by pickup with each other and, when they do not coincide with each other, moving the pickup to a prescribed address. CONSTITUTION:A counter 222 which performs counting operations at a fixed cycle while a disk is played and successively outputs expected address information to which a pickup 215 is to be moved next, and a detecting circuit 223 which always compares the latest address information from an address memory 212 with the expectd address information form the counter 222 and, when they do not coincide with each other, generates an output, are provided in a host microcomputer 200. The host microcomputer 200 judges that the information reading point of the pickup 215 following up the recording track of a disk 5 jumps a track from the output of the detecting circuit 223 and controls the drive of a pickup moving mechanism 216.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an in-vehicle disc player, and more particularly to an in-vehicle disc player that plays back 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.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide a vehicle-mounted 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 uses a mechanical means in which the disc reproducing mechanism is supported with respect to the housing by a vibration isolating mechanism, and an electrical means using a so-called tracking servo system, and also moves the pickup to a predetermined address when track skipping occurs. The player is characterized by having three means for responding to external vibrations applied to the player body.

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 arrow X in the figure indicates leftward, and the direction of arrow 7 indicates upward. In addition,
The disk 5 uses a laser beam to record and read signals, and has an outer diameter of about 1'20 m. 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, which will be described later, in this case in a front-back direction (direction of arrow Y and the opposite direction thereof). As is particularly clear in FIG. 6, the tray 10 is composed of 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 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 has a long hole 14a formed in the movable member extending in the front-rear direction (by slidingly engaging with a bin 10e protruding from the right end of the tray 1°). In addition, the left moving member 1
3 is located between the tray 10 and the bracket 12, and is formed in the moving member so as to extend in the front-rear direction.
a is supported by being slidably engaged with a bin 10c provided at the left end of the tray 10. Note that the right end of the tray 10 is connected to the guide bar 15 in the tray movement direction.
That is, they are slidably engaged and supported at two support points spaced apart in the front-rear direction. An interlocking shaft 17 having arms 17a and 1711 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. Arms 17a, 17
Bottles 17C and 17d are respectively protruded from the inner surface of the tip end of the movable member 13.14, and the bins are respectively inserted into elongated holes 13b and 14b formed in the rear end of the movable member 13.14 and extending in the vertical direction. They are slidably engaged. At the right end of the chassis 7 is a power transmission mechanism 1 consisting of a plurality of gears rotatably supported.
9 is provided. A motor 20 is fixedly installed in front of the power transmission mechanism 19, and as is particularly clear in FIG. 4, a worm 20 is fitted onto the output shaft of the motor.
a is meshed 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. It should be noted that a protective film 23 made of felt or the like is attached to the disk supporting surface of the container 22 in order to avoid direct contact between the disk supporting 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 movable member 13.14, the movable member 13.14 is slidably engaged with cam holes 13d and 14d formed in the movable member 13.14, respectively. 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 for releasing and locking 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 at the right end of the main body 7a of the chassis 7. On the other hand, a cam groove 148 is formed 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.

A lever 25 is swingably provided at the rear end of the tray 10, and a recess 7C and a cam 5 are provided at the swinging end of the lever.
A pin 26 that can be engaged with the pin 14c is provided in a protruding manner. 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 14e, and is slidably engaged with the bin 26, allowing movement of the movable member 14 after the tray 10 reaches the predetermined position on the turntable. A long hole 14f is formed.

These recesses 7c, cam grooves 14e1, elongated holes 14 [and bins 2
6, the container 22 is locked to the tray 10 until the tray 10 reaches a predetermined position on the turntable, and when the tray 10 reaches the predetermined position, the container 22 is released from the locked state with the tray 10, and A locking/unlocking means for locking the tray 10 to the housing 2 is configured.

Further, the lock/release means, the chassis 7, and the tray 1
0, the container 22, the movable member 13, 14, and the driving force applying means consisting of the power transmission 1!14fli19 and the motor 2o, the slot 3a of the housing 2
A disk transport mechanism is configured to transport the disk 5 inserted from the playback position, that is, onto the turntable.

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. This support member 28 is provided with two guide shafts 30a, 30. which extend parallel to the rotating surface of the turntable, in this case in the front-rear direction, and act as guide means. b is fixed. 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 in FIGS. 9 and 10, the slider 31 has a screw 31 extending in the direction of movement of the slider, that is, in the front-rear direction.
A is provided, and a rectangular parallelepiped case 33 is rotatably held by the screw. That is, case 3
3 rotates in a plane perpendicular to the slider movement direction. Furthermore, inside the case 33, there is an objective lens 33a that irradiates the information recording surface of the disc 5 with a laser spot light.
An optical pickup means (other than the objective lens 33aJX is not shown) for reading information from the disk is carried. Further, the slider 31 and the case 33 are collectively referred to as a carriage 34.

Here, for example, as shown in FIG. 2, in the tray 1o forming a part of the disk transport mechanism, the disk transport mechanism is in the pre-disk transport position (the state shown in FIG. 2) and the carriage 34 is A circular opening 10d is formed which faces the objective lens 33a when the instrument 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 unit 1itu 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 disk transport mechanism Ia and the key 17 cartridge 34 are in the above-described rest position before playing. A lid 2b that closes the opening 2a is also screwed to the housing 2. 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 opening 106.2a and the like.

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 case 33, and the elongated hole has a threaded portion 35.
A is screwed into the case 33 &i The circular head 3 of the screw 35
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 351). That is, by rotating this biasing screw 35, the case 33 is slightly rotated around the support screw 31a.The biasing screw 35 and the circular head 35b of the 41+ screw are fitted The matching elongated hole 31b constitutes an adjusting means for adjusting the rotation angle position of the case 33, that is, adjusting the so-called tangential direction of the optical pickup means (not shown) provided in the case. has been done. In addition, after the darning adjustment is completed, it is fixed with the screw 31c.

As shown in FIGS. 6 and 11, a screw shaft 37 is rotatably attached to both ends of the support member 28 and is arranged parallel to the guide shafts 30a and 30b. A motor 38 is arranged in front of the screw shaft 37.
is configured to be rotationally driven by the motor via power transmission means including a pulley 39 and the like. As is particularly clear in FIG. 11, the slider 31
A leaf spring 41 is fixedly installed in the shape of a cantilever, and a half nut 42 that is screwed onto the screw shaft 37 is fixedly installed at the protruding end of the leaf spring.

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 trajectory of the carriage 34 at a position sandwiched between the carriage and the drive mechanism that drives 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 part of the turntable 45 and the spindle motor 46 facing the case 33 can be inserted. 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 mm 47a is brought into contact with the output shaft 46a of the spindle motor 46.

The holder 847a and the idler 47b constitute a 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 approximately 10 μm normally occurs between the output shaft 46a and the turntable 45, but by providing the above-mentioned contact means, this gap is corrected and the rotation of the output shaft 46a, and thus the turntable 45, becomes accurate and smooth. be.

The above-mentioned support member 28 and guide shafts 30a, 30
b, the carriage 34, and the drive V including the motor 38
M structure (drives carriage 34) and turntable 45
, the spindle motor 46, the idler 47b, etc., and the surrounding small members related thereto constitute a playing means for playing the 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. Place it in the corresponding ・
By providing the vibration isolation member 29 at the support point, the vibration isolation 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. A support point of the support member 28 is provided on an arc centered on the center of gravity of the above-mentioned playing means of the sword at the midpoint and equidistant from the support point, and even if an anti-vibration member 29 is provided at the support point, a large vibration-proofing effect can be obtained. is obtained.

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 10 (] formed in the tray 10 extending in the vertical direction, so that the support member 51 can be attached to 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 pins 51a of the support member 51 are also inserted into the elongated holes 100 of the L-ray 10 (as well as the pins 51a formed in the movable members 13 and 14, respectively). cam holes 13(l and 14(
It is movably engaged with l. Cam hole 13 (l
and 14g are 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 moves up and down with respect to the turntable 45 as the moving members 13 and 14 move back and forth.

Note that the cam holes 13d formed in the moving members 13 and 14
, 13g and 14d and 14g, container 22
The cam holes 13d and 14d that engage with the bottle 22a of the support member 51 are referred to as first cam holes, and the cam holes 130 and 14 (l) that engage with the pin 51a of the support member 51 are referred to as second cam holes. , the total length of the first cam holes 13d and 14d in the disk insertion direction and the second cam holes 13g and 14.
] is almost equal to the total length 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 suppressing member 52 has a ring-shaped magnet 52a, and the magnetic force of the magnet forms a disk clamp.

Further, the suppressing member 52 and the supporting member 51 that supports it freely during the day are made of a magnetic material such as a steel plate, and when the supporting member 51 is in the non-clamped position, the suppressing member 52 is attached to the supporting member 51 by the magnetic force of the magnet 52a. It is designed to be absorbed. 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
It is not limited to the upper surface of 2, but may be provided on the open portion of the housing l 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
arcuate portions 54b and 55b are formed to be fitted into the inner circumferential grooves 54b and 55b, and two protruding claws 54c and 55C that can engage with the bottom surface of the circumferential groove 52G of the suppressing member 52 are provided on the arcuate portions. ing.

A pair of left and right synchronization plates 57.58 are also provided on the lower surface of the support member 51 behind the clamping plates 54.55, and are rotatably attached to the support member 51 via bins 57a and 58a, respectively. ing. ? The synchronization plates 57 and 58 each have three arm portions 57c, 57d, 57e and 58c, 5.
8d 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. Furthermore, long holes 57o and 58o are also formed at the tip ends of the arm portions 57d and 58d that protrude approximately forward, and these long holes are connected to the bins 540 and 55e that are protruded from the clamping plates 54 and 55, respectively. They are slidably engaged with each other. That is, the synchronizing plates 57 and 58 are configured to synchronize the operations of the clamping plates 54,55. In addition,
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, the 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 suppressing 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 the two 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-mentioned positioning members 61, 62, etc. not only positions the suppressing 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 holding portion of the disk.

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

55f, 57h, and 58h extend substantially perpendicularly to the disk supporting surface of the container 22, and act as retaining portions that engage with the outer periphery of the disk 5. In addition, coil spring 6
4, each of the bin members 54f, 55F, 57h, and 58h approaches the outer periphery of the disk (and urges the positioning portions 061 and 62 in the direction).

Here, as shown in FIG. 6, each bottle member 54r
, 55r, 57h, and 58h are tapered to reduce 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
are held by 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, an L-shaped small bracket 71 is fixed to the upper end of the right moving member 14, and a bin member 71 is fixed to the small bracket.
2 is provided protrudingly. This bin member 72 extends in the vertical direction, and the tray 10 is at a predetermined position on the turntable 45, that is, the rotation center of the disk 5 supported by the container 22 that moves together with the tray is the rotational center of the turntable 45. It is arranged so that when it reaches a position that substantially coincides with the axis, it engages with the front end of a pawl 73 screwed to the tip of the arm portion 58e of the synchronizing plate 58, which is a component of the positioning means.

That is, the positioning members 61 and 62 are operated as the moving member 14 moves after the tray 10 reaches the predetermined position, and the bin members 54t, 55r, and 57h are provided 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) positions the disk 5 at a predetermined position on the container 22.
1.62, etc.) slides in contact with the bin member 72 and reciprocates with the container 22 in a direction substantially perpendicular to the tray movement direction. Due to this formation, the contact between the bottle 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, a flexible material such as rubber is formed into a plate shape inside the disc insertion slot 1-3a formed in the front panel 3 that constitutes the front surface of the housing. A pair of flexible longitudinal members 76 and 77 are provided, which are arranged such that one end in the transverse direction faces each other and close the slot 3a on their main surfaces. Each of the flexible longitudinal members 76 and 77 has a pair of fixing parts IJ78 and 79 each having an L-shaped cross section at the other end in the short direction, that is, at the non-opposing end.
It is attached to the front panel 3 by.

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 parts and the disk 5 is smooth. Further, near each opposing end of the flexible longitudinal members 76, 77, thin flexible portions 75a and 77a which are particularly easy to bend are provided, 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 members 76, 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 Ia structure 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 FIG. 2, @6, and FIG. 14(a), (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 has an intermediate member 94 (also shown in Fig. 14) which is provided in front of the play start switch so as to be movable in the front-back direction and is provided with a forward direction. It engages with the outer periphery of the disk through.

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, 97 are provided on the lower surface of both ends of the arm 97.
b 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 held in place by a coil spring (not shown).
A pie spacing is applied in the clockwise direction in the figure. 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 9711 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 FIG. 19 and FIG. 20, which includes a post microcomputer (g, abbreviated as lower host microcomputer) 200, which is the first control section that controls the entire system, and at least an operation section. 201 and display section 2
02;
These microcomputers 200 and 203 are mounted in units separated from each other and are connected via a main power line 2o4, 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 closed, the stabilizing circuit 2
The power supply voltage Voo stabilized at 08 rises instantaneously as shown in FIG. 21 (J). It gradually rises, and when it reaches a predetermined level V1, the host microcomputer 200 is reset.Host microcomputer 200
issues a control signal after a certain period of 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 (1). As a result, the power supply voltage supplied to the sub-microcomputer 203 and the reset circuit 211 rises as shown in FIG. 21 (Cj).
), it gradually rises at a predetermined time constant and reaches a predetermined level V.
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 install a dedicated synchronization line to synchronize the two microcomputers 200 and 203, which complicates the wiring structure and increases the time required. Also,
When synchronizing separately with respect to the rise of the power supply voltage, both reset circuits 209 and 211 are connected to the second
It is necessary to use a complex circuit as shown in FIG. However, by controlling the power supply of the sub-microcomputer 203 by the host microcomputer 20'0, it is possible to configure the reset circuit 211 on the sub-microcomputer 203 side as a simple circuit as shown in FIG. This allows the configuration to be simplified.

Note that the reset circuit 209 on the host microcomputer side is
I! Momentary interruptions in voltage can be detected, and as a result, as is clear from FIG. It can be done.

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 R+ and Zener diode ZD, and is connected to sub microcomputer 203 and host microcomputer 200.
The power is supplied to the power terminal of the host microcomputer 20.0 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 is also connected to the power supply through a resistor R2.
The other end is grounded. After the performance, when the disc is transported to the eject position, the detection switch 103 is closed, and a low-level detection signal is sent to the sub-microcomputer 20.
3 input terminal.

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 (disc transport means) 214 that transports the disc inserted from the slot 3a of the housing 2 (first illustration) to a playing position, and a pickup moving mechanism 216 that moves the pickup 215 in the radial direction of the disc. The configuration is such that main power is supplied through a main In switch 217 that is on/off controlled by the host microcomputer 200. The host microcomputer 200 is
When this player system is used in combination with another source source, such as a tape deck or tuner, if another source is input during performance, the main power supply to the loading mechanism 214 and pickup moving mechanism 216 is stopped. In order to do so, the main power switch 217 is controlled to be turned off. In addition, the loading mechanism 214 is shown in FIGS. 4 and 6 in the pickup movement! 11216 has a structure as explained 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 information read in step 15 passes through a demodulation circuit 218, and address information is detected in an address determination circuit 219, 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 215
This is a focus detection circuit that constantly monitors whether the pickup is in focus based on the output of the pickup, and generates an output when the pickup is out of focus. host microcomputer 200
When the output of the focus detection circuit 220 is generated, the pickup 215 is moved to the home position (FIGS. 6 and 1).
(The pickup moving mechanism 216 is driven and controlled, and the focus is again taken at the home position. After the focus is taken again, the address The pickup 215 is moved to the immediately previous address stored in the memory 212 so as to start playing again from the address immediately before the focus went out.

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 old address stored in the backup memory 213.

The host microcomputer 200 further includes a counter 222 that counts at a constant cycle during the performance and sequentially outputs information on the expected address to which the pickup 215 should move next.
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 there is a mismatch.
With the output of 3, it is determined that the information reading of the pickup 215 following the recording track of the disk 5 has skipped the 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 mentioned 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.

Reference numeral 224 denotes a temperature sensing element such as a thermistor, which 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 1o4 (shown in FIG. 24) that detects the completion of transport of the disc to the performance position, the host microcomputer 200 switches the main power switch 217 in FIG. The temperature sensing element 2 is turned off (opened) to stop supplying power to the mechanism.
The standby state is maintained until the output of 24 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,
A comparator 233 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 scratches on the disk. This allows for good playability against defects (and strong resistance to vibrations).Switching the servo band can be done, for example, by setting the characteristics of the equalizer inserted in the servo loop to several levels and adjusting the appropriate characteristics. Select or
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 player enters the standby state with a disc loaded into the player, it is possible that a disc may 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 at the playing position, and detects when a disk is carried into the playing position. In order to prevent double insertion of disks, the main power is supplied to the disk set display section 202a and the display section 202a is driven by the output of the detection switch 104 through the power switch 234, for example, even when other sources are input. We can warn you.

Note that the life of the semiconductor laser diode 226 shown in FIG. 24 depends on the temperature, and use at high temperatures causes a significant reduction in the life, so it is preferable to install it away from the heat source. 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 lens 235 for driving the objective lens 33a becomes a heat source that generates heat.
For example, a pickup 215 including a semiconductor C-9 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, and a drive section 236 serving as a heat source is mounted on the other unit. Therefore, the influence of heat on the semiconductor laser diode 226 can be suppressed.

Next, the operation of the in-vehicle autoloading disc player having the above-mentioned configuration will be explained based on 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. Left and right bin members 54f and 5
When the center of rotation of the disk 5 crosses the line connecting the axial centers of the disks 5f and 5f, the disk 5 will remain inside the housing 2 even if you release your hand because both the bin members 54f and 55f are biased toward the outer circumference of the disk. be drawn into. 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 includes four bin members 54f, 55f,
Since the disk is positioned with its outer periphery supported at four points by 57h and 58h, once positioned, the disk will not shift due to external vibrations such as vehicle body vibrations.

As shown in FIG. 15 (a, mountain), 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 bin 97a of the arm 97, and the arm For example, it is rotated counterclockwise in FIG. 15(a). Therefore, the left end of the arm 97 engages with the detection switch 98 and operates the detection switch (state II in FIG. 15). 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 25 swingably provided on the tray 10
The movable member 14 can be moved relative to the tray 10 because the bin 26 protruding from the swinging end of the movable member 14 is engaged with the cam groove 14e formed in the movable member 14. Container 22 is locked to tray 10. Therefore, the rotation of the motor 20 causes the moving member 14.
13, tray 10, and container 22 are only moved rearward. Note that the bin 26 slides on the right end of the chassis 7 while being engaged with the cam groove 14e.

Almost at the same time when the tray 10 and the container 22 move backward by a predetermined amount and the disk 5 is stored in the housing 2, the bin protruding from the right end of the arm 97 opens as shown in FIG. 15(C). 97b is the cut-and-raised portion 7 of the chassis 7
Abuts on f. In this way, the bottle 97b is cut and raised at the part 7.
By coming into contact with [, the engagement state between the arm 97 and the detection switch 98 is maintained. Therefore, the motor 2σ continues to rotate, and the disk 5 is further transported rearward. Along with this, the arm 97 is moved to the 15th position by the cut and raised portion 7f.
The arm 97 is rotated counterclockwise at C1, and the engagement state of the arm 97 with the disc 5 is released.
It almost coincides with the axis of rotation.

At the same time as the engagement between the arm 97 and the disk 5 is released, the pin 26 moves out of the cam groove 14e and enters the recess 7 formed in the chassis 7, as shown in FIG.
Go inside C. As a result, the tray 10 is connected to the chassis 7,
Therefore, the housing 2 is locked, and at the same time, the locking state of the movable member 14 with respect to the tray 10, and therefore the locking state of the container 22 with respect to the tray 10, is 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 into 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. 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.

In addition, the moving member 13. By moving backwards only in '14,
Clamp l! A bottle 51 protruding from the support member 51 of the I structure
cam holes 13 formed in the moving members 13 and 14, respectively;
1J and 14g, the pressing member 52 approaches the disk 5 together with the support member 51, and the disk 5 is clamped, as shown in FIG. Note that the support member 5
The movement stroke in the vertical direction of 1 is approximately 3.5 mm,
Further, the movement stroke of the container 22 in the vertical direction is approximately 6°5IllI11. The movement stroke of the container 22 is 2■ smaller than the movement stroke of the support member 51, but this is because the cam hole 13d, in which the bottle 22a protruding from the container 22 is slidably engaged,
This result was brought about because 14d has 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, so that 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>location 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 the TOC rank M (target address) from the current address, for example,
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 1-OC position is calculated in step 3, the pickup 215 is moved to the corresponding position (step 4). And T by the pickup 215.

The contents of C are read (step 5), and then the performance moves on. Pickup 215 home position is T
The closer the position is to the OC position, the more quickly the performance movement can be made. 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).

If a song to be played is specified, T.

After reading the contents of C, in Figure 27, step 7
Steps the pickup in the direction of the specified address (address of the specified song) using the initial setting step amount. Then, in step 8, it is determined whether or not the current address is the designated address. If it is determined that it is not the designated address, it is further determined in step 9 whether or not the current address is larger than the designated address. 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 it was being fed in the FWDh direction, proceed to step 11 and reverse the feeding direction.
Furthermore, reduce the feed step amount (step 12), L,
After that, in step 13, the pickup 215 is fed by a step amount, and the process moves to step 8.

If it is determined in step 10 that the data was being fed in the reverse (REV) direction, that is, from the outer circumference to the inner circumference of the disk, it is determined whether or not the smallest address in the information recording area of the disk would be exceeded if the feed was made in the previous step amount. Step 14
If it is determined that the
Then, the step amount is decreased and the process returns to step 14, and the above operation is repeated 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. . FWD
If it is determined that it is in the h 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 sent 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 it does not exceed the limit, the process moves to step 12.

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
The number of recording tracks on the disk that the beam spot traverses is determined based on the output of step 5 (step 22), and when it is determined in step 23 that the counted number has reached a predetermined number, the pickup 215 starts reading from that point on. Start operation.

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, 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 (step 27), and then the pickup 215 is moved to the last read address, that is, the address immediately before the focus was removed (step 28), and the performance is started again from that address. Furthermore, 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 goes out, the last read address stored in the address memory 212 becomes the address immediately before the focus goes out.

Further, when it is determined that the main power supply has been cut off during the performance due to turning off the accessory switch 207 (shown in Figure 19) of the automobile (step 29), the ejecting operation by the loading mechanism 214 is started in step 30 (step 3
o) Furthermore, in step 31, it is determined whether a predetermined time has elapsed since the ejection operation was started, and when it is determined that the predetermined time has elapsed, the ejection operation is stopped;
It enters a waiting 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 suppressing 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 disk 5 on its surface, deformation of the disk 5 can be prevented, and the container 22 and the suppressing member 52
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. Also, as mentioned earlier,
When used in combination with another source, when the other source is input during a performance, the main power supply to the mechanism is cut off and the disc 5 is taken into the main body. In this case, backup power is supplied only to the loading mechanism 214 of the mechanism section 1.
．． It may be possible to perform the same operation as above,
This also prevents deformation of the disk.

When the performance ends and the carriage 34 reaches the limit position of movement, the carriage 34 and turntable 45 are stopped, and at the same time, the motor 20 starts a reversing operation. Therefore, tray 10. The moving members 13, 14, the container 22, and the suppressing member 52 are returned to the rest position before playing by following a process completely opposite to the operation at the time of disc loading described above. Further, the carriage 34 is also returned to its home position.

In this way, the disk 5 is recovered.

Incidentally, if it is desired to replay 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 replay is performed.

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

Effects As explained above, according to the present invention, in addition to the mechanical means of supporting the disc playback mechanism with respect to the housing by the vibration isolation mechanism and the electrical means of the tracking servo system,
It is equipped with a means to move the pickup to a predetermined address in the event of track skipping, and can respond to external vibrations applied to the player body using three means.
An in-vehicle disc player that is strong against external vibrations applied to the player body and capable of stable playback operation can be obtained.

[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.
FIGS. 4 and 5 [A plan view, a front view, a left side view, and a right side view, respectively, of the internal structure of the autoloading disc player; FIG. 6 is a perspective view of the main parts of the internal structure; FIGS. Fig. 14 (ω. mountain) and (C) are partial detailed views of the internal structure, Fig. 15 (ω.
. 19 and 20 are block diagrams showing the control system, and FIG. 21 is a block diagram showing the control system.
Each part in FIG. 9 (waveform diagram of ω~(d>), FIG. 22 and FIG.
11 is a circuit diagram, 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.
FIG. 2 is a flowchart for explaining the operation of the control system shown in the figure. 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 part 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... River... Backup memory 214
... Kawaguchi-ding mechanism 215 ... Focus detection circuit for pickup 220 ... 224 ... Temperature sensing element 226 - Old semiconductor laser diode 229 ...
...Piezoelectric Buzzer Applicant Pioneer Co., Ltd. Agent Patent Attorney Motohiko Fujimura Book 7 Illustrations 8 Koson, 24 Pictures 25 Concave 4 2 Otsuji n Procedural Notes (Method) 1. Display of the case 1982 Patent Application No. 111840 2, Title of the invention 1 Ei disk 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

Claims (2)

[Claims] (1) A disc playback mechanism including a pickup that reads program information including address information from a disc on which the program information is recorded and a pickup moving means that moves the pickup in the radial direction of the disc, and the disc playback mechanism is mounted in a housing. 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, expected address information that is updated at regular intervals, and the latest address read by the pickup. An on-vehicle disc player characterized by comprising: control means that constantly compares the information and controls the pickup to move to a predetermined address when a discrepancy occurs. (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.