JPS60229278A - Designated address searching method in disk player - Google Patents

Abstract

PURPOSE:To prevent an information read point from jumping out of an information recording part by feeding a step by an initialized step quantity, and feeding the step by decreasing the step quantity until it is decided that it does not exceed the maximum or the minimum address, in case it is decided that said step quantity exceeds the maximum or the minimum address. CONSTITUTION:After reading an information recording start position of a disk, a pickup is brought to step feed by an initialized step quantity in the designated address direction. Whether the present address is a designated address or not is decided, and in case it is decided that it is not the designated address, whether the present address is larger than the designated address or not is decided subsequently. In case it is larger than the designated address, whether the pickup is fed in the forward (FWD) direction or not is decided. In case it is being fed in the FWD direction, the feeding direction is inverted, and also the step quantity feed is executed by reducing the feed quantity. In case it is decided that the pickup is fed in the reverse direction, and also it is decided that it exceeds the minimum address, the step feed is repeated by reducing the feed quantity. In this way, it can be prevented that the information read point jumps out to the outside of the information recording part.

Description

DETAILED DESCRIPTION OF THE INVENTION [11L] The present invention relates to a specified address search method in a disc player.

1" [1] When selecting a desired song automatically and quickly in a disc player, for example, a player that plays a digital audio disc on which a PCM signal is recorded, conventionally, the information reading point of the pickup is not set close to the specified address. Ji1 in a certain step? If the specified address is near the maximum or minimum address corresponding to the outermost or innermost circumference of the information recording area of the disk,
The information reading point of the pickup sometimes jumped out of the information recording section. In that case, since read information cannot be obtained from the pickup, the spindle servo that drives the disk to rotate at a constant speed will run out of control.

The present invention has been made in view of the above-mentioned points, and is capable of searching for a specified address in a disc player without causing the information reading point of the pickup to jump out of the information recording section when searching by step feeding. The purpose is to provide a method.

The specified address search method according to the present invention involves step-feeding the pickup toward the specified address by an initial setting step amount, and then determining whether or not the address sent by the initial setting step amount exceeds the maximum or minimum address. If it is determined that the step amount is not exceeded, the step amount is reduced until it is determined that the step amount is not exceeded, and the appropriate step is sent.

EMBODIMENT OF THE INVENTION 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 A-loading 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. Accordingly, the arrow X direction in the figure indicates the left side, and the arrow Z direction 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 Shireshif consists of a main body 7a and a subchassis 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 isolators 448 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 in the seat shifter 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.
The main body 10a is formed in a ``-'' shape, and a side wall member 10b is screwed to the right end of the main body. Si1? - A bracket 12 is fixed to the left end of the tray 10, and a bin 10c protruding from the left end of the tray 10 is formed so as to extend along the front and back direction of the bracket 12. It is supported by being slidably engaged with the elongated hole 12a.

On the other hand, a pair of moving members 1 are provided on both left and right sides of the shifter.
3 and 14 are arranged. The right moving member 14 is made of resin or the like, and is slidably supported by a guide bar 15 fixed to the right end of the chassis 7 so as to extend in the tray moving direction, that is, in the front-back direction. 1”
1 /7'l f 611 tRt-NA M +J
e pattern -r 1. % x, in detail, moving member 14
is a long hole 1 formed in the moving member so as to extend in the front and rear directions.
4a is supported by being slidably engaged with a bin 10e protruding from the right end of the tray 10. 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 and back direction is formed in the moving member and a bin is provided at the left end of the tray 10. 10c and is supported by slidably engaging it. The right end of the tray 10 is slidably engaged with and supported by a guide bar 15 at two support points spaced apart in the tray movement direction, that is, in the forward 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. There is a bottle 17c on the inner surface of the tip of the arm 178.17b.
and 17d protrude from each other, and each of the bins is slidably engaged with long holes i3b and i4b formed in the rear end portions of the movable members 13.14 and extending in the vertical direction. . A plurality of #A rotatably supported on the right end of the SH V-SH 7.
A power transmission II m 19 consisting of a width is provided.

A motor 20 is fixedly installed in front of the power transmission mechanism 19, and as is particularly clear in FIG. There is.

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 of the moving member 14 in the moving direction of the moving member, that is, in the forward 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.

, l: By the motor 20, power transmission mechanism 19, and interlocking shaft 17 including arms 17a, 17b, etc.,
A driving force applying means for applying driving force to the moving members 13 and 14 is configured.

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, the tray 10, and the moving part 013
and 14 constitute a disk holding section. Note that a protection 1123 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. A total of four bins 22a, one pair each at both left and right ends of the container 22, are provided extending in the left and right direction. The container 22 has four elongated holes 10f1 . :ffi By being movably engaged, it is supported by the tray 10 so as to be movable within a predetermined range in a direction perpendicular to the tray movement direction, that is, in the vertical direction. The bin 22a of the container 22 is also slidably engaged with cam holes 13d and 14d formed in the moving member 13.14, respectively, after passing through the elongated hole 10f. The cam holes 13d and 14d are arranged upward in the disk insertion direction, that is, from the front to the rear; It is constituted by a horizontal part that continues from the end and extends rearward, and a tapered part that continues from the rear end of the horizontal part and extends parallel to the tapered part. That is, the container 22 is configured to move up and down as the moving members 13 and 14 move in the front direction.

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 container 22 is locked with the tray 10. A lock for releasing the tray 10 and locking the tray 10 against 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, on the right moving member 14, when the tray 10 is at a predetermined position on the turntable, the position in the tray moving direction is at the concave portion 7c.
is provided so as to be freely movable in four directions, 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.

Further, the movable member 14 is formed so as to extend forward continuously from the cam W414e, and is slidably engaged with the moon pin 26.
A long hole 14f is formed to allow movement of the moving member 14 after the tray 10 reaches the predetermined position on the turntable.

These recesses 7c, cam grooves 14e, elongated holes 14f 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 unlocked from the tray 1°. 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, 14,
The power transmission mechanism 19 and the driving force applying means comprising the motor 20 and the like constitute a disc transport mechanism that transports the disc 5 inserted through the slot 3a of the housing 2 to the performance position, that is, onto the turntable.

Next, it is installed in the housing 2 and is used for playing the disc.
The means of performance will be explained.

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 extending parallel to the rotating surface of the turntable, in this case in the front-rear direction, and functioning as guide means.
The feet 30a and 30b are fixed. A slider 31 formed in a substantially =1 shape is movably supported by 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 33a is not shown) for reading information from the disk is carried. Also, the slider 31 and case 33 are =
It is collectively called 1 Yaritsuji 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 pre-disk transport position (the state shown in FIG. 2) and the carriage 34 is A circular frontage portion 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 mechanism without removing it. Therefore, although not described in detail, it is a member that constitutes a part of the Y disk transport am, and 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. The fact that a gap 11 similar to the opening 10d is formed in the member to which the Furthermore, as shown in FIG. 1, there is also a circular opening 2a on the negative side of the housing 2.
is formed. This opening 2a is also the same as the opening 1 described above.
As with 0d, the disk transport mechanism and carriage 34 are
When the objective lens 33a is in the static position before the performance described above,
It is positioned so as to face the housing 2
A lid 2b that can close the 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, the light irradiation power of the optical pickup means is adjusted before and after through the opening 106.2a, etc., as shown in FIGS. 9 and 10, the slider 3
1, an elongated hole 31b is formed extending in the left-right direction in a plane perpendicular to the slider movement direction. The elongated hole 31b is provided corresponding to one end of the rotation of the case 33, and the circular head 35b of the biased screw 35 whose screw portion 35a is screwed into the case 33 is fitted into the elongated hole. 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 fit 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. As shown in FIGS. 6 and 11, the support member 28 has a screw shaft 37 disposed parallel to the guide shafts 30a and 30b, which is rotatably mounted at both ends of the support member 28. It is being A blade part 38 is disposed in front of the screw shaft 37, and the screw shaft 37 is rotationally driven by the motor via a power transmission means including a pulley 39 and the like. As is particularly clear in FIG.
1, a leaf spring 41 is fixed 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.

A drive mechanism for driving the main 11-ridge 34 is made up of 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. It is configured.

A turn daple 45 is disposed on the extension line of the movement locus of the carriage 34 at a position sandwiched between the carriage and the drive Il1% that drives the carriage, and is fixed to the H-branch member 28. There is. 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 47 b /fi that is rotatably supported by a holding mechanism 478 is brought into contact with the output shaft 468 of the spindle motor 46 . These holding mechanism 478 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. Normally, there is a gap of about 10 μm between the output shaft 46a and the bearing portion 46b, but by providing the above-mentioned close contact means, this gap is compensated for and the output shaft 46a, and therefore the turn This allows the table 45 to rotate accurately and smoothly.

The above-mentioned support part t428 and guide shafts 30a, 3
Qb, the carriage 34, the drive mechanism including the motor 38 (driving the main 11 carriage 34), and the turntable 4.
5, the spindle motor 46, the idler 47b, etc., and the peripheral small members related thereto constitute a playing means for performing D and C-sque performances.

Here, the method for bringing the support member 28 onto 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 midpoint of the movement trajectory of the center of gravity of the key I7 rigid 34 and the rotation axis of the turn table 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 reason why the support point of the support member 28 is set as described above is to take into consideration the change in the center of gravity of the playing means due to the movement of the carriage 34.
In simple terms, for example, a support point of the support member 28 is installed on a circular arc centered on the center of gravity of the playing means when the carriage 34 is at the midpoint of the movement trajectory, and at an equal distance, and a vibration isolating member is installed at the support point. Even if two are installed, a great vibration-proofing effect can be 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 attached at a position above the container 22 and sandwiched between the moving members 13 and 14. A total of four bottles 51 are provided at both left and right ends of the support member 51.
a is provided extending in the left-right direction. Support member 51
The bins 51a are movably engaged with four elongated holes 10i11 formed in the tray 10 to extend downward, so that the tray 10 can be moved in a direction perpendicular to the tray movement direction, that is, in an up-down direction. It is supported movably within a predetermined range. The slots 18 of the support member 51 are also inserted into the elongated holes 10g of the tray 10, and the holes 13o and 14g formed in the moving members 13, 14, respectively.
It is engaged in a freely movable manner. The hm holes 130 and 14o are 1tla to Fh in the direction in which the support portion 51 moves away from the turntable 45, that is, from the front to the rear.
It is tilted to the top. 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.

41, cam holes 13 formed in the moving members 13 and 14
'd, 13o, 146 and 140, the cam hole 13 (1, 146 is referred to as the first cam hole) that engages with the bin 22a of the convener 22;
The cam holes 13g and 14a that engage with 1a are referred to as second cam holes. In addition, the total length of the first cam holes 13d and 14d in the disk insertion direction and the second cam holes 13g and 14
g is approximately 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 operation. Note that the position shown in FIG. 3 is referred to as the unclamped position of the support member 51. 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. The support member 51 moves between the clamp position and the non-clamp position. Also shown in Figure 3,
The suppressing member 52 has a magnet 52a formed in an annular shape, and the magnetic horn of the magnet forms a disk clamp. Further, the suppressing member 52 and the supporting member 51 that rotatably supports the suppressing member 52 are made of porcelain bamboo such as a steel plate, and the supporting member IJ5
1 is in the unclamped position 417rU, the pressing member 5
2 is fixed so that it is attracted to the support member 51 by the magnetic force of the magnet 52a. Further, as shown in FIG. 6, an M cylinder member 52b made of felt or the like is attached to the upper surface of the pressing member 52, and a photograph of the supporting member 51 when it is in the non-clamped position is attached. Due to movement or the like, the upper surface of the pressing member 52 and the housing 2 are prevented from coming into direct contact with each other. However, this buffer member 5
2 is not limited to the upper surface of the pressing member 52, but the housing 2.2 facing the pressing member 52 when the supporting member 51 is in the non-clamped position. It may be provided in a part of.

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.
It is attached to. Each opposing portion of the holding plates 54 and 55 is formed with circular arc portions 54b and 55b that are fitted into a circumferential groove 52C (shown in the third figure) formed on the outer periphery of the pressing member 52. Circumferential groove 520 of pressing member 52
Two protruding claws 54C and 55C that can be engaged with the bottom surface of the holder are provided.

A pair of left and right synchronizing plates 57 and 58 are also disposed on the lower surface of the supporting member 51 behind the clamping plates 54 and 55, and are rotatably attached to the supporting member 51 via pins 57a and 58a, respectively. It is being Each synchronizing plate 57, 58 has three arm parts 57C, 57d, 57e and 58c, 58.
d 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, elongated holes 57 (1, 58 (l) are formed at the tips of the arm portions 57d, 58d that protrude approximately forward, and these elongated holes are connected to the pins protruding from the clamping plates 54, 55, respectively. 54e
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 within the center substantially perpendicular to the rotational axis of the pressing member 52, and each engages with the outer periphery of the pressing member 52 at, for example, two claws 540, 550). 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 Connano 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 and 14 constitutes a disk carrier). ) is movable within the city approximately parallel to the disk holding 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, coil spring 6
4 biases positioning members 61 and 62 in a direction in which each of the bin members 54f, 55f, 57h, and 58h approaches the outer periphery of the disk.

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

However, the bottle member 57h is not shown. During disk loading or ejection, the disk 5 is held between the respective bin members, and at the same time as the disk 5 is held, the disk is 5 is placed on the disk supporting surface of the container 22 and is pressed down.

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 ray 1o is at a predetermined position on the turntable 45, that is, the center of rotation of the disk 5 supported by the container 22 that moves together with the tray is on the turntable 45. It is arranged so that it engages with the front end of a pawl 73 screwed to the tip of the arm portion 58e of the synchronization plate 58, which is a component of the positioning means, when the synchronization plate 58 reaches a position that substantially coincides with the rotation axis of the positioning means. .

That is, as the moving member 14 moves after the 1-ray 10 reaches the predetermined position, the positioning members 61, 62 are operated, and the bin members 54f, 55f, 57h provided on the positioning members 61, 62- are moved. .

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 whose diameter decreases in the direction approaching 5, that is, downward. The positioning means (positioning member 6
1.62, etc.) slides firmly against the bin member 72 and reciprocates with the -1 antenna 22 in a direction substantially perpendicular to the tray movement direction. Since the pin 72 is formed, the contact between the bottle member and the positioning means is positive. Therefore, the resistance caused by the contact becomes extremely small, and the disk rope franging and ejecting operations become smooth. Further, the positioning means receives a thrust force due to a component force generated by the taper action of the bottle member 72.

Next, each mechanism that operates when the disk 5 is inserted into 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 installed so that one end in the hand direction faces each other and closes the slot 3a on 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 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 arranged on the right side of the placket 12 fixed to the left end of the chassis 7. The pin 85a is rotatably attached to the bracket 12 at approximately the center in the longitudinal direction. This lever 8
5 is configured 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 86 is attached to the left end of the prevention member 86.
A is provided in a protruding manner, and the bottle is slidably engaged with an elongated hole 85b formed at the front end of the lever 85. The lever 85 and the prevention member 86 constitute a disk double insertion prevention means for preventing double insertion of the disk from the slot 3a. That is, lever 8
As the prevention member 86 moves up and down in accordance with the rotation of the member 5, the prevention portion 86b provided on the prevention member moves into the slot 3.
3a to prevent the insertion of a disk 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 disc is used for double insertion of the disc mentioned in F. By using the power to drive the 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 the disk 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 made by bending a steel plate, for example, and has a chipped portion 91a at its front end that is inclined so as to approach the disk supporting surface of the antenna 22 in the disk insertion direction. .

As shown in FIGS. 2, 6, and 14 (ω), a disk 5 is inserted into the rear end of the tray 10 through the slot 3a and positioned at the predetermined position on the container 22.
A play start switch 93 is provided so as to engage with the outer periphery of the disc when it is pushed slightly in the disc insertion 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 and back direction and is provided with a forward bias. It engages with the outer periphery of the disk.

As shown in FIG. 2, a support shaft 96 extending downward is fixed to the right L side of the main body 1Qa 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 of the arm 97.
I'm being kicked. There are bins 97a on the bottom surface of both ends of the arm 97.
, 97b are provided in a protruding manner, and the bin 97a on the left end side can be engaged with the outer periphery of the disk 5 positioned on the container 22. The support shaft 96 also includes a detection switch 9.
A switch holding member 99 that holds the switch 8 so as to be able to engage with the left end portion of the arm 97 is swingably attached. The 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 10 moves a predetermined amount backward from the position shown in FIG. 2 and reaches a predetermined position, the arm 97
A bin 97b protruding from the right end of the chassis 7 is configured to abut against a cut-and-raised portion 7f provided near the rear end of the chassis 7.

As shown in FIGS. 6 and 11, the gear ridge 34
A detection switch 101 is provided on the right side of the carriage 34 to detect when the four carriages have returned to their home positions, that is, the rest position before the performance starts. 028, and a protrusion 31e protruding from the slider 31, which is a component of the kittredge 34, is configured to generate a detection signal by engaging with the actuator 101a of the detection switch.

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 104 is fixedly provided, which detects completion of disk loading and clamping by engaging a portion of the disk. However, this detection switch 104 is connected to the seat via a bracket 105. - Attached to the shifter.

In addition, the aforementioned operation button group 6, play start switch 93, detection switches 98, 101, 103 and 104
Each signal emitted from the housing 2 is transmitted to a control section (not shown) disposed at a predetermined position within the housing 2. 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 includes a host microcomputer (hereinafter abbreviated as host microcomputer) 200, which is the first control unit that controls the entire system, and at least Operation unit 201 and display unit 2
A sub-microcomputer (IJ), which is the second control unit responsible for controlling the 02, is mounted on a separate computer, and is connected to 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 Voo stabilized at step 8 rises instantaneously as shown in FIG. 21(a). The output of the reset circuit 209 gradually rises with a predetermined time constant with respect to the power supply voltage ω, as shown in FIG. host microcomputer 20
0 emits a control signal after a certain period of time T has passed from the reset point, and outputs a power supply voltage to the sub-microcomputer 203 (1)
The power switch 210 inserted into the power line between both microcomputers is turned on to supply power. As a result, the power supply voltage VoO supplied to the sub-microcomputer 203 and the reset circuit 211 rises as shown in FIG. 21(C). The output of the reset circuit 209 is 21st with respect to the electric mTi pressure (C).
As shown in Figure +cb, it gradually rises at a predetermined time constant, and when it reaches a predetermined level (2), the sub-microcontroller 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 to synchronize both microcontrollers 200° and 203, and the wiring 1lIl is reduced accordingly.
This makes the structure more complicated and takes more time. In addition, when synchronizing separately with respect to the rise of the power supply voltage, both the reset circuits 209 and 211
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 200, the reset circuit 211 on the sub-microcomputer 203 side can be described as a simple circuit as shown in FIG. 23, and the overall circuit configuration can be simplified. This means that it can be converted into

Note that the reset circuit 209 on the host microcomputer 1 side can detect momentary interruptions in the power supply voltage, and as a result, even if there is a momentary interruption in the power supply voltage, the host microcomputer 200 and submicrocomputer 203 is reset, and it is possible to maintain synchronization between the two.

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 ZI), and is used by sub microcomputer 203 and host microcomputer 2.
C through the communication line 206 between 00 and diode D+
The power is supplied to the power terminal of the host microcomputer 200.

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 Vco via 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 opened and 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 C disk is pushed slightly in the loading direction in the input position, the play start switch 93 is opened.
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 (loading mechanism) that 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. There is. When this player system is used in combination with another source source, such as a chive 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 in order to supply power to PPl[1j. Note that the loading mechanism 214 is shown in FIGS.
The structure 216 has a structure as described in FIGS. 9 and 10, respectively.

In FIG. 20, program information including address information is recorded in the i disk 5, and this recorded information is read by a pickup 215. The address information is detected in the determination circuit 219,
The current position of pickup 215 is determined. The latest address information is stored in the address memory 212 within the host microcomputer 200. 220 is pickup 21
This is a focus detection circuit that constantly monitors whether the pickup is in focus based on the output of No. 5, and generates an output when the pickup is out of focus. host microcomputer 20
0 is generated when the output of the focus detection circuit 220 is generated.
Place the pickup 215 in the home position (1 point at which the detection switch 101 in FIGS. 6 and 11 is activated)
), and the pickup moving mechanism 216 is controlled to return to the home position, and the pickup moving mechanism 216 is also controlled to pick up one scrap at the home position again. After the focus is regained, the pickup 215 is moved to the previous address stored in the address memory 212 so as to start playing again from the address immediately before the focus was removed.

During performance, if the main power of the system is cut off by turning off the accessory switch 207 of the automobile.

The power-off detection circuit 221 detects this and issues an output 1-φ.
Ru. Upon generation of this detection output, the latest I address information stored in the address register 212 is written to the backup memory 213. Then power is supplied again! It is written in and taken out of the Kotoki backup memory 213.
The performance starts from this address.

The host mine 200 further includes a counter 222 that counts at a constant cycle during performance and sequentially outputs expected address information for the next movement of the pickup 215.
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.
With the output of 3, it is determined that the information reading point of the pickup 215 that follows the recording track of the disk 5 has skipped that track.
The pickup moving mechanism 216 is driven and controlled in order to move the pickup to the expected address based on the output.

Furthermore, if the information recorded on the disc 5 is a musical tone,
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 as described above, there is no effect on auditory sense 1, but if the recorded information is control information, Since it is necessary to read the data, in such a case, the pickup 215
By moving the information 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), which detects the completion of transport of the disc to the playing position, the host microcomputer 200 switches the main power switch in FIG. 217 is set to A-off (open) to stop supplying power to the mechanical section, and the temperature sensing element 224 remains in the timing state until the output of the temperature sensing element 224 falls within the above-mentioned 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 discs, and a lighting command output from the sub-microcomputer 203. The lighting is driven by a signal, but
The lighting timing is restricted. The lighting command signal becomes one input of the AND gate circuit 227,
As the other input, the output of the detection switch 104 that detects when the loading of the disc to the performance position is completed is supplied, and the output of the AND gate circuit 227 is used to drive the semiconductor laser diode through the drive circuit 228. 226 is driven to turn on. 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 the control (No. H) from the sub-microcomputer 203 via the drive transistor Q1 to generate sound. In other words, 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 an M standard 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 types of servo systems such as A-cush servo, tracking servo, and tangential servo, as is generally known, the servo By widening the band and reducing the servo gain by 1, the influence of disturbances is compressed and the system becomes resistant to external vibrations. - To prevent large errors in the servo system due to disk scratches or defects (H), which causes phenomena such as track skipping, conversely, by widening the servo band, the generated T error signal can be reduced. becomes weaker as it becomes larger.In a home-use player, external vibrations are not constantly applied, so the servo band can be determined by prioritizing the disk reading ability, but in the car-mounted player 17, there is always disturbance. It is difficult to set a band that satisfies both the strength against vibration and the readability against scratches, fingerprints, defects, etc. on the disc.

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 improves playability against defects and increases resistance to vibration.

As explained with reference to J3 in FIG. 19, when this player system is used in combination with other sources,
If another source is input during a performance, the main power supply to the mechanism is stopped, but if the disc enters the playback state with the disc loaded into the player, the disc may be accidentally inserted into the second Possible case of single insertion. Therefore, the 24th
As shown in the figure, a disc set display section 202a is provided as one of the display sections 202 to display that a disc is set in the performance position, and a detection switch is provided to detect when a disc is brought into the performance position. By supplying power to the disk set display section 202a through the power switch 234 and driving the display section 202a even when other sources are input by using the output of the power switch 234, the insertion of two small disks can be prevented. I can tell you the cost.

Note that the lifespan of the semiconductor laser diode 226 shown in FIG.
I love being happy. For example, in the drive circuit for the pickup 2150 objective lens 33a (shown in FIG. 9) 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, so they are separated from each other. For example, by mounting a pickup 215 including a semiconductor laser diode 226, an adjustment polycomb 238 for gain adjustment of an amplifier 237, etc. on one of two units, and mounting a drive unit 236 serving as a heat source on the other unit, the semiconductor laser diode 2
This makes it possible to suppress the influence of heat on 26.

Next, the operation of the in-vehicle auto-rowing disc player Aa having the above-mentioned configuration will be explained in accordance with the first playing order. Note that FIGS. 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.
and 55F, and moves while pushing both positioning members 61 and 62 left and right by a distance G. When the rotation center of the disk 5 crosses the line connecting the axial centers of the left and right bin members 54f and 55f, both the bin members Since 54f and 55f are biased toward the outer periphery of the disk, the disk 5 will not be drawn into the housing 2 even if the hand is released.Furthermore, at this time, the guide member 91 will effectively guide the disk 5. Then, 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 support the outer periphery at four points to determine the position W:I, so once positioned, the disc will not shift due to external vibrations such as vehicle body vibration.

As shown in FIG. 15(a), when 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 is rotated ν in the counterclockwise M direction as shown in FIG. 15 (turning to ω), for example. Therefore, the left end of the arm 97 engages with the detection switch 98 to operate the detection switch (state +b+ 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 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 and thus the container 2 is locked relative to the tray 10. Therefore, due to the rotation of the motor 20, the moving member 14
．． 13, the tray 10, and the container 22 are only moved rearward. Note that the bin 26 slides on the right end of the shifter while being engaged with the cam groove 148.

At approximately the same time that the tray 10 and the container 22 move a predetermined distance rearward and the disk 5 is housed in the housing 2, as shown in FIG. The bottle 97b comes into contact with the cut-and-raised portion 7 of the sheets 11-7. As the bin 97b contacts and covers the cut-and-raised portion 7f in this manner, the engagement state between the arm 97 and the detection switch 98 is maintained. Therefore, motor 20
continues to rotate, and the disk 5 is conveyed further backward. Accordingly, the arm 97 is rotated counterclockwise in FIG. 15(C) by the cut and raised portion 7f, and the engagement state of the arm 97 with the disk 5 is released. In this state, the rotation center of the disk 5 is approximately aligned with the rotation axis of the turntable 45.

At the same time as the engagement between the arm 97 and the disk 5 is released, the pin 26 disengages from the cam groove 14e and moves into the four portions 7 formed on the chassis 7, as shown in FIG.
Go inside C. As a result, the tray 10 is shifted and thus locked with respect to the housing 2, 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 moving members 14 and 13 are moved backwards in succession, resulting in the state shown in FIG. 17. That is, container 22
The bin 22a protruding from the movable member 13.14 slides along the cam holes 13d and 14d provided in the movable member 13.14, respectively, and the container 22 is placed in a state in which the disk 5 is supported, as shown in FIG. to move downward. Therefore, disk 51
It was placed on J Turntable 45 soil. At this time, the disk supporting surface of the container 22 separates from the disk 5, and the disk 5 can no longer rotate 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 13g and 14 (+) formed in the moving members 13 and 14, respectively, the pressing member 52 approaches the disk 5 together with the supporting member 51 as shown in FIG.
Disk 5 is clamped. The vertical movement stroke of the support member 51 is approximately 8,51111, and the vertical movement stroke of the container 22 is approximately 6°5n. The movement stroke of the container 22 is 2 m smaller than the movement stroke of the support member 51, but this is due to the cam holes 13d and 14d in which the bin 22a protruding from the container 22 is slidably engaged. This is a result of 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, so that the prevention member 86 prevents double insertion of the disk into 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. ), 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 R times of information recording on 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 detected switch 101 is activated.

When playing, check step 1 to see if the °C5 pickup 215 is at the home position as shown in Figure 26.
If it is at the home position, the pickup 215 is focused (step 2), and the reading operation of the pickup 215 is started. and 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 based on the address information obtained by the pickup 215.
contents ) position is calculated. The TOC records the number of songs recorded on the disc, the absolute time, the playing time of each corner, etc., and must be read before starting a performance.
It is necessary to read the OC distribution information.

As a method of calculating the TOC position (target address) from the current address, for example, the present applicant's patent application No. 58-1.
Using the method proposed in No. 201994, that is, the closer you get to the target address, the more accurately the distance to the target address can be obtained, calculate the distance to the target repeatedly until the distance to the target address reaches a constant value. There is a way to move the pickup.

When the TOC position is calculated in step 3, the pickup 215 is moved to the 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 you are to the OC position, the faster you can move to the playing motion f-1
"c".In addition, slap 1 causes pickup 2.
If it is determined that the pickup 15 is not in the Baume 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 there is a person from the specified 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, the feed step amount is reduced (step 12), and then the pickup 215 is moved to step 64 after step 13.
Then, proceed to step 8.

Step 10r If it is determined that the data was being fed in the reverse (REV) direction, that is, from the outer periphery to the inner periphery of the disk, the step 10 determines whether or not the smallest address in the information recording area of the disk is exceeded when the previous step scale is used. 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 the pickup 215 was being sent in the R[V direction, and if it is determined to be in the REV direction, the process proceeds to step 11. Transition. 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, step 18 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 no preparation is required, 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 By determining whether it is greater than the minimum) time,
It is determined whether the maximum (or minimum) address is exceeded.

By adopting the search method described above, even if an address near the maximum (or minimum) address is specified, the step amount will be too large and the pickup 215 will jump out of the information recording area of the disk. will disappear. 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. Flowchart 1 will be described below based on one example.

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 jumped out onto the mirror surface area 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 whether the beam spot has entered the information recording section (step 21).
It is judged by. If it is determined that the
The number of recording tracks on the disk that the beam spot traverses is counted based on the output of the pickup 215 (Step 22), and 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 on. 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 device 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 the 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 main focus is taken again at the position (step 27), and then the final read address 1 is picked up to the previous address 21.
5 is moved (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 off, the last read address stored in the address memory 212 is not - This is the address immediately before the 7J line goes out.

Further, if it is determined that the main power supply has been cut off during the performance due to the turning off of the automobile accessory switch 207 (shown in FIG.
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 means that when the eject operation is started, the turntable 45'' (shown in FIG. This is the time required to get into a state where it can hold 5.

With the above operation, when the power is cut off, the disk 5 can be supported on the surface by the first inlet 22, so deformation of the disk 5 can be prevented. Therefore, the disc 5 does not move up and down due to vibrations of the car or the like.

Note that when the accessory switch 207 is turned off, tS
Not only Gendan no Tosa 4L, but also when Tatsumi hits the system during performance, the same action can be performed to prevent the disc from deforming. .Also, as mentioned earlier, when used in combination with other sources, when the other sources become human power during the performance,
When the main power supply to the mechanism section is cut off, the 41SJ is taken into the main body of the disk 5, but in this case, backup power is supplied only to the loading machine 4M 214 of the mechanism section. Then, the same three gluing operations as described above are performed, and the deformation of the disk can be prevented in the same way as in step 1.

When the performance ends and the carriage 34 reaches the movement limit position 4, the kill ridge 34 and the turntable 45 are stopped, and at the same time the motor 20 begins to reverse operation. Therefore, tray 10, moving member 13.14, -1 antenna 22
, the pusher 1F member 52 follows a process completely opposite to the operation during disk loading described above (returns to the static position 11 before playing. Also, the kit ridge 34 is also returned to the home position).
He was forced to return to work.

(Disc 5 is recovered.

Incidentally, when 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 indoors for home use.

1--" As explained above, according to the present invention, the pickup is step-fed toward a specified address by an initial set step amount, and then whether the address sent by the initial set step amount exceeds the maximum or minimum address. If it is determined that it is exceeded, the step amount is reduced until it is determined that it is not exceeded, and then the step is sent.
Even if an address near the maximum or minimum address is specified, the step amount will not be so large that the pickup will go outside the information recording area of the disk, and the specified address can be reliably searched.

At the same time, information can be reliably read from the TOC image.

[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 (ω. mountain) and (C) are partially detailed views of the internal structure, and Figure 15 (ω.
. 119 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 (ω~(small waveform diagram, FIG. 22 and FIG.
1, FIG. 24 is a detailed diagram of the surroundings of the rib 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. It is a flowchart diagram for explaining the operation of the me 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 ...・King 20a... Arm 22... Container 31... Slider 34... Carriage 35... Flat head screw 38 ...Motor 39...Pulley 45...
... Turntable 46 ... Spindle 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, N) 1
,103.104...Detection switch 200...111 Stroke microcomputer 203...
...Sub microcomputer 209.211...Reset circuit 212...
... Address memory 213 ... Backup memory 2
14...Rope ink tail1215...
...Pickup 220...Full J-7J bus detection circuit 224...
... Temperature sensing element 226 ... Semiconductor laser diode 229 ...
...Piezoelectric Buzzer Applicant BuyAnia Co., Ltd. Agent Patent Attorney Motohiko Kneemura 2nd Theta Diagram 224 Book 25 Concave 2 Otsu Diagram 1st page continuation 0 Inventor Hiroshi Hirano Yuki Tokorozawa Shigekaen

Claims (1)

[Claims] A pick-up that reads program information from a disk on which program information including address information is recorded searches the information recording section of the disk, stores the maximum and minimum addresses in the information recording section in advance, and searches for a designated address. In doing so, the pickup is step-fed toward the specified address by an initial setting step amount, and then it is determined whether the address to be sent by the initial setting step amount exceeds the maximum or minimum address, and it is determined that it does not exceed the maximum or minimum address. If the address is exceeded, step feed is performed using the initial setting step amount, and if it is determined that the step amount is exceeded, the step amount is decreased until it is determined that the step amount is not exceeded. A method for searching for a designated address in a disc player, characterized by repeating step feed until the address matches the designated address.