JPH0266731A - Double-sided performance optical disk player - Google Patents

Abstract

PURPOSE:To move a carriage in a lengthwise direction and to facilitate the double surface performance of a disk by providing each mutual and parallel pair of guiding members at first and second moving paths along the recording surfaces of the double surface of a disk to mount a carriage to hold an optical type pickup onto a turn table. CONSTITUTION:First and second guiding members 14 and 15, which are movable guiding members, are fitted to the chassis of a disk player and a moving channel by the members 14 and 15 are made parallel. Along the channel of the members 14 and 15, a carriage 17 is conveyed in the lengthwise direction by the conveying mechanism and moved from one side pair to other side pair. The carriage 17 holds an optical type pickup and the one edge is coupled into one side of a pair of the lengthwise guiding member. A connector by two latch members 29 and 30 to engage in other side in the position surface orthogonal to first and second moving paths of a pair of the members 14 and 15 is provided, and the double surface performance of disks 10 to 12 is facilitated.

Description

[Detailed description of the invention] Technical field The present invention relates to a double-sided optical disc player.

Background Art Two optical pickups are provided to correspond to the front and back image recording surfaces of an optical disc (hereinafter simply referred to as a disc) placed on a turntable, making it possible to play both sides of the disc without performing an eject operation. A double-sided optical disc player is known. Such double-sided optical disc players use two expensive optical pickups, resulting in high costs.

Therefore, a double-sided performance is performed in which a carriage carrying an optical pickup is guided and driven along first and second moving paths along one of the recording areas of a disc placed on a turntable to perform performances on both sides of the disc. An optical disc player has been proposed, for example, in Japanese Patent Application No. 611-3071.7. In this double-sided optical disc player,
The first and second movement paths are each formed by a set of longitudinal guide members that are parallel to each other, and each has a transport mechanism that transports the carriage from one set of the longitudinal guide members to the other set. . In addition, the gear ridge is each 411 of the long guide section.
It has a pair of engaging portions that engage with each of the engaging portions.

By the way, it is preferable that the optical axis of the light beam emitted from the optical pickup E-stage is perpendicular to the recording surface of the optical disk, and an angle correction adjustment mechanism is provided to form the carignon or the first and second moving paths. The mechanical position of the guiding part is adjusted.

However, since the set of parts (J'K1'i degree and the dimensional precision of the parts themselves are different), the angle correction 11 of the carriage to the correct position Jl is performed for each of the first and second movement paths.

Rather, it is preferable to adjust the angle of the carriage for the first and second moving paths separately, and in a double-sided optical disc player using a single carriage, It has been difficult to make favorable angle correction adjustments on both of the second travel paths.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned points, and its first object is to provide a disk player which can play both sides of a disk using a single optical pickup stage, and which is capable of playing both sides of a disk. The purpose of the present invention is to provide a double-sided optical disc player that can perform angle correction adjustment to suit the inward orientation of the disc.

The double-sided optical disc player according to the present invention guides and drives a carriage carrying an optical pickup along first and second movement paths along the recording surfaces of both sides of a disc placed on a tongue table. There is a double-sided performance optical data player C that performs double-sided performance of the first disk.
and the second movement path is -rl first sP row 1. (,1
The carriage is formed by the long guide section H of the long guide section H, and the carriage is conveyed from one set of the long guide section to the other set of \\conveying machine (1η is shown in white), and the carriage / is the optical pickup. a support member which carries a member and engages with -h of the set of eldest child guide members at one end thereof, and a member which is attached to the other end of the support member in a plane that intersects the first and second movement paths. a position adjusting member provided so that the position thereof can be adjusted; and two engagers capable of engaging with the other of the pair of longitudinal guide members, one of the two engagers being arranged on the position adjustable member; The other of the engagement elements is supported by the free end of the flexible spring part H in the plane marked 1, and the position of the free end of the spring part H is adjusted by 1 with respect to the position adjusting member. The present invention is characterized in that it has a 1M adjusting means for adjusting the angle of the tangential force direction of the light beam with respect to the recording surface of the disk on both sides of the disk.

Embodiments Hereinafter, a double-sided optical disc player as an embodiment of the present invention will be described with reference to the accompanying drawings.

As shown in FIGS. 1 to 4, the player housing (not shown) of the double-sided optical disc player includes a lower string 5 and an upper string connected by, for example, three leg members 1, 2, and 3. There are 6. In addition,
In the figure, the direction of the arrow Y is the front, and the direction of the arrow X is the left. Further, arrow Z indicates upward.

As shown in FIGS. 2 and 3, a turntable 7 is provided at the front end of the lower yarn 5, and a disc 10 is provided at the front end of the lower yarn 5.
It is clamped to the turntable 2 by a clamper 9. The disk 10 shown in FIGS. 1, 3, and 4 has a diameter of about 30 cm, and two circular substrates each having a signal recording layer attached thereto are arranged so that each signal recording layer is on the inside. are connected to each other. In addition, as shown in Fig. 2, in this disc player, each diameter is approximately 20 mm.
Qm 12 cm discs] 1 and 12 can also be played. The turntable 7 has a centering member that engages with the center hole of each of the disks having the root diameter to center each disk.

A pair of cylindrical movable first guide portions are arranged so as to be parallel to the recording surface of the disk in the radial direction of the disk 10, in this case in the front-rear direction (arrow Y direction and the opposite direction), and to sandwich the disk vertically. 14 and a fixed second guide part 15 are disposed, and are mounted on the upper yarn 6 and the lower chassis 5, respectively. A carriage 17 is provided so as to be freely engageable and detachable from the first and second guide portions 1415. The carriage 17 includes an optical system including an objective lens 18 and a servo drive machine 47 that servo-drives the objective lens in two directions: the forward axis direction (focus direction) and the direction perpendicular thereto (tracking force direction). It carries an optical pickup consisting of H. The details of the structure of this carriage] 7 will be described later.

Note that an optical pickup emits irradiated light onto the recording surface of a disk and reads recorded information based on changes in the reflected light.

A loose gear 23 is provided at the rear end of the gear ridge 17, and is rotationally driven via a gear transmission mechanism 25 by a motor 24 mounted on the carriage. Note that the motor 24 and gear transmission mechanism 25 are not shown in FIG.

Another gear 27 is provided at the left end of the carriage 7, and this gear 27 is also rotationally driven by the motor 24 via the gear transmission mechanism 25. A pair of rack members 29 and 3 are arranged parallel to the first guide member 4 and the second guide member 15 and vertically sandwich the disk 19 between them.
0 is placed. The gear 27 described above can mesh with both of these scoop members 29 and 30.

As shown in FIGS. 1, 2, and 5, the left rack member 30 is connected to a bracket 34 fixed to the lower chassis 5.
It is swingably attached to the top via a pin 35 at approximately the center, and its free end can be moved close to and away from the gear 27 in a direction perpendicular to the moving direction of the optical pickup. Note that claw portions 4A30c are formed on the lower surface near both ends of the rack member 30, and since the claw members engage with the bracket 34, the swinging of the rack member is regulated within a predetermined range. . As is particularly clear from FIG. 5, a pair of front and rear coil springs 36 are provided as bias biasing means for biasing the free end of the rack member 30 in a direction toward the gear 27.

As shown in FIGS. 1 and 4, the right rack member 29
Also, pin 38 is connected to the left rack part +4' 30.
The rack member 29 is attached to the bracket 32 via the bracket 32 so as to be swingable in a plane perpendicular to the moving direction of the optical pickup. It has a claw member 29c that regulates the
Its free end is biased toward the gear 27 by a coil spring 39 serving as a pie-ska haiku means.

As shown in FIGS. 2 to 4, the carriage 17 has two rollers 4 and 42 as engagers at its right end.
- They are spaced apart in the lower blade direction (arrow Z direction and the opposite direction). The lower roller 41 is a linear guide protrusion 4 provided on the lower shear 5 in parallel with the second guide portion 15.
3 Rolling on top? LI, the upper roller 42 is the upper chassis 6
It can roll on a guide rail 44 as a movable guide member installed parallel to the first guide part 14. That is, regarding the roller 41, the linear guide protrusion 43 provided on the lower chassis 5 functions as a fixed guide part. By the first guide section 4 and the guide rail 44,
A first moving path is formed for guiding the carriage [7] along the upper recording surface of the disk [0], and these are collectively referred to as a first guide mechanism.

Further, a second movement path for guiding the carriage 17 along the lower recording surface of the disk 10 is formed by the second guide portion 15 and the linear guide protrusion 43 of the lower chassis 5. Collectively referred to as the 2-guidance mechanism.

The rear end portions of the first guide member 14 and the second guide member 15 are formed into a pointed shape, and the carriage] 7 can be freely engaged with and detached from each of the indoor members 14 and 15 at the pointed end portions. . At the rear of each guide portion 1.4.15, a pointed shaft-shaped holding member 47 is disposed that fits into the carriage 17 detached from each indoor member and holds the carriage in place of the inner guide. has been done. Further, although not shown, means is provided which fits into this holding part 4'' 47 and prevents the carriage 17 from falling out from the holding member. ]7.

As shown in Figures 2, 4, 6 and 7, the first guide part 14, which is a movable guide part, is connected to the fixed support part via two support shafts 14a and 14b. The support shaft 14a that supports the front end of the first guide portion 14 is fixed or rotatably attached to the yarn 6 (=1). The guide shaft 14 is pivotable around this support shaft 1.4a.The support shaft 14a extends in a row around the rotation center of the tongue table 7, and is connected to the first guide section at j;L. 4'' 14 pivots in a plane perpendicular to the rotation center.A support shaft 14b for attaching the rear end of the first guiding part to the ``nijyarn 6'' is attached to the upper yarn 6 in the left-right direction (arrow X direction). and the opposite direction) and is formed with a curvature centered on one support shaft 14a, preferably the other support shaft 14a.
is inserted into. As is particularly clear from FIGS. 6 and 7, there is a longitudinal adjustment section 14 at the upper end of the support shaft], 4b.
c are joined together by caulking, for example, and between the longitudinal adjustment part) and the upper yarn 6, there is a suppressing means for pressing the free end, that is, the rear end, of the first guide part 14 toward the upper yarn 6. A spring j and a catch 14 and d are provided.

This spring washer 14d acts as a means for creating a frictional force between the free end of the first guide part 14 and the upper part 6, and The plate 14 is fixed to the upper shear 6 by the friction force 1111'.

In addition to the spring washer 1.4d described in 1, various configurations may be used as means for applying a frictional force between the free end of the first guide part 14 and the rainbow 6. Is it possible? If the spring washer 14d is used, it is possible to generate the frictional force with only this, reducing the number of parts, and it is easier to reduce costs because commercially available products can be used. .

Further, according to the spring washer 14d, it is possible to generate a constant vibration force of 1r, i without variation, which contributes to stabilizing the quality of the product.

As shown in FIG. z183 and FIG.
14c is provided to extend substantially parallel to the first guide part 14, and is connected to the upper yarn 6 through the pin 14e at its center and to the pivot surface of the first guide part 14 such as the upper 1J. It is set so that it can swing freely within the plane. The JK manual adjustment section 14c is connected to the first guide section 14 via a support shaft 14b at its rear end. As shown in Figure 6, attach a U-shaped glue to the front end of the longitudinal adjustment part 1.4 c.
-4f is formed, and a small circular portion 6c is formed in the yarn 6 corresponding to the missing portion of Jl;IJ. The eccentric driver 14g shown in FIG.
4f, and an actuator 14h provided at the tip of the eccentric driver can be inserted into the circular recess 6C. That is, by rotating this eccentric driver 1.4g, the longitudinal adjustment part 't4' 1.4c swings around the pin 14e, and this 1'3 resists the frictional force caused by the spring washer 14d. As a result, the first guide portion 14 pivots around the support shaft 14a, which is its pivot point. That is, the first guide part)jA' ],
9. Position the guide path of the first guide mechanism including 4 in a plane perpendicular to the center of rotation of the turntable 7 (FIGS. 3 and 4); 'J adjustment IH7ru. With this configuration, the extension line of the movement locus of the optical axis of the irradiation light as the optical pickup moves along the recording surface of the disk intersects with the center of rotation of the disk on both sides of the disk. I can do it. That is, when assembling the disc player, the turntable 7 is made movable so as to be at the center of rotation, and the second guide guides the gear ridge 7 along the eight surfaces (for example, the bottom surface) of the disc. The relative position of the mechanism and the turntable 7 is set by moving the turntable 7, and the center of rotation of the turntable 7 is located at the extension line of the movement trajectory of the optical axis of the irradiation light emitted toward the eight surfaces. After this, the position of the guide path of the first guide mechanism is adjusted by swinging the longitudinal adjustment section 4]4C by the eccentric driver 14g as described in 1. The extension line of the movement locus of the optical axis of the irradiation light is made to intersect the rotation axis of the turntable. In this way, since the extension line of the movement trajectory of the optical axis of the irradiation light and the disk rotation center are substantially perpendicular to each other on both sides of the disk, stable reproduced signals can always be obtained on both sides of the disk.

In this embodiment, the pivot point of the first guide member 14 is located at a position corresponding to the inner circumference of the disc placed on the turntable 7 and the vicinity thereof, or It may be arranged at a position corresponding to the outer periphery and its vicinity.

However, by providing the pivot point corresponding to the inner peripheral portion of the disk, it is possible to set the pivot angle of the first guide portion 14 with respect to the rotation center of the turntable with high precision.

Further, the longitudinal adjustment member 14c provided for pivoting the first guide portion 14 is not necessarily necessary, and the longitudinal adjustment member 14c is not provided and the first guide portion 14 is not provided with the longitudinal adjustment member 14c. The first guide member may be pivoted by directly abutting the tool. However, such a lever-like longitudinal adjustment member 1
4c, the force required to adjust the position of the first guide part +; l' 14 is small, and the first guide part 14
It is possible to pivot with high precision. In addition, as shown in FIG.
4, the pivot angle of the first guide portion 14 corresponding to the swing angle of the longitudinal adjustment member] and 4c becomes relatively large,
The position of the first guide member 14 can be adjusted quickly.

As shown in FIGS. 1 to 3 and 8, the holding member 47 that fits into and holds the carriage 17 detached from the first and second guide mechanisms described above is a plate-shaped rotating part cage 5.
0, it is extended forward (in the direction of arrow Y) and taken out by ζ1. Rotating part +4' 50 is fixed to the rear end of lower yarn 5.
The support shaft 53 is rotatably supported by a support shaft 53 extending and implanted in the support shaft 53 . In addition, a half-moon-shaped internal sun gear 55 is installed on the plate 52 coaxially with the rotating shaft of the rotary part 50. The rotating part 50 is provided to rotate along a plane that intersects with the direction in which the gear ridge 17 is guided by the first guide mechanism and the second guide mechanism described above, in this case, a plane that is orthogonal to the guide direction of the gear ridge 17. It is being

The planetary gear 23 provided on the carriage 17 can mesh with the teeth 55a of the sun gear 55 described above. However, the planetary ryoichi 23 has an insertion hole 50a (first
(shown in the figure) and meshes with the sun gear 55. sun gear 5
A flange-shaped disengagement regulating member 56 is integrally provided on the outer circumference of the planetary gear 55 so as to be in sliding contact with the front side surface of the planetary gear 23 to prevent the planetary gear from disengaging from the meshing state with the sun gear 55.

The separation regulating member 56 is provided around the central axis of the sun gear 55 within a predetermined angular range. ¥89Figure Ca) and (b)
As is particularly clear from the figure, both ends of the withdrawal regulating member H are formed with tapered surfaces 56a that are inclined in a direction approaching the tooth portion 55a of the sun gear 55 from one end of the withdrawal regulating member to the other end. There is. Therefore, the portion where the tapered surface is formed forms a convex portion 56b that protrudes forward (in the direction of the arrow Y) with respect to the other portion of the separation regulating member. The planetary gear 23, which has meshed with the teeth 55a of the sun gear 55 while rotating, immediately starts to shift along the sun gear, but at the beginning of the shift, it is guided by this tapered surface 56a and moves backward (in the direction of arrow Y). (in the opposite direction), and meshes deeply and reliably with the tooth portion 55a of the sun gear 55.

The above-mentioned rotating member 50 and the detachment regulating member 56 formed integrally with the sun gear 55 move the carriage core from one of the above-mentioned engagement and disengagement positions beside the first and second guide machines to the other engagement and disengagement position. A conveying mechanism is configured to reverse and convey the image until the end of the image. Furthermore, the above-mentioned pair of rack parts 4!29 and 30, the sun gear 55, the planetary gear 23 provided on the carriage 17, the two wheels 27, the gear transmission mechanism 25, and the motor 24 provide the first and second A driving means is configured to move the carriage] 7 on the side of the guide machine and drive the above-mentioned conveyance machine +1η to reverse the carriage.

In addition, as is clear from the above-mentioned configuration, the above-mentioned gripping portion 4A4
7 is conveyed along a plane that intersects with the guiding directions of the first and second guiding mechanisms described above by the rotation of the rotating part 50. On the other hand, a gripping section (A4
7 and the guiding directions of the first and second guide mechanisms that guide the carriage during disc playing, the disc playing 11. The movement stroke of the carriage 17 required for this reversal is added to the movement stroke of the carriage 17 at lJ, resulting in an increase in the size of the disc brake metal body. As mentioned above, by making the direction of movement of the carriage 17 at the time of reversal intersect with the direction of movement of the carriage 17 of the disk performance 11j,
The overall size of the disc player has been reduced.

Here, as mentioned above, the rack members 29 and 1 with <, -1=J
30 in a plane perpendicular to the moving direction of the optical pickup? I will explain why I decided to do IJ.

As mentioned above, due to the rotation of the gear 27, the gear ridge 17 is self-propelled on each of the above-mentioned pair of rack parts +J29.
is inverted in each rack member, but in such a configuration, the rack member "-
A reaction force of 1f is applied from the rack member side to the rolling gear 27.

In addition, another reaction force accompanying the reversal of the carriage 7, including the rotary part 50, which is attached to the cough carrier fM, is applied to the carriage 17 from the sun gear 55 side via the planetary gear 213.

When the gear 27 is about to finish rolling on the rack section 4, the planetary gear 2'3 is turned off! ', lj 55, the two reaction forces mentioned above will then counteract each other, and the carriage 17 may be unable to move between the rank member and the sun wheel 55. As mentioned above, the rack members 29 and 30 are constructed so that they can swing when a force of a predetermined magnitude greater than the forces of the coil springs 36 and 39 is applied. The antagonistic state of the reaction forces is avoided, and the carriage]
7 can smoothly transition between each rack section +'' and the transport mechanism.

As shown in FIG. 8, a holding member 47 that fits and holds the carriage 17 and engages and disengages it from the first and second guide mechanisms described above is attached to the rotary part frame 50. It is attached with screws 47a and spring washers 47b.

The screw 47a is loosely fitted into a round hole 50b formed in the rotary part 50, so that the holding member 47 can swing freely around its base end. In addition, the spring washer 47b
has a wavy cross-sectional shape, and the high asker is moved toward the home position shown by the solid line in FIG. 8 with respect to the holding member 47.

-1-6 By making the holding part 4'47 swingable, it may be slightly deviated from its normal position in the holding part system or in the first and second guide divisions or in the first and second guide divisions. Even if the carriage 17 is attached in an upright position, when the carriage 7 attempts to move between these members, the holder +/147 will swing appropriately, and the carriage 17 will be guided by the holder +/141. Smooth transition between the first and second guide portions. In this embodiment, the entire holding member 47 may be swingable, or only the tip portion may be swingable. Further, the tip portion or the entire holding member 47 may be formed of a flexible material. In other words, it is sufficient that the holding member 47 is capable of bending and restoring the portion where the gear ridge 17 is to be guided while absorbing installation errors.

As is clear from FIGS. 1 and 4, the carriage 17
The gear 27, which is provided in the rack member 47 and can mesh with each of the pair of rack members 29 and 30, has its rotation axis within a plane intersecting the extension direction of each of the rack parts H, and the gear 27 is located within the conveyance range of the holding member 47, that is, the reversal. The pair of racks are formed to the south of the moon, facing the area. Because of this configuration, the carriage]
7 between the normal rotation position and the reverse rotation position, the gear 2
7 may be rotated in the same direction. That is, when the optical pickup moves between the normal rotation position and the reverse rotation position where the optical pickup holds the disk, the rotation direction of the gear 27 is constant, and the control circuit for controlling this is simplified.

As shown in FIGS. 31, 3, and 10, wiring means is provided for supplying power to the optical pickup on the carriage 17 and for transmitting electrical signals. As shown in the figure, the wiring means is provided with a first flexible part 59 arranged to sandwich the rotating part +J' 50 in a plane perpendicular to the rotational axis, and a first flexible part 59 so as to be flexible in a plane parallel to the rotational axis. a second flexible section 60 connected to the optical pickup and motor 24 on the carriage; It is made of a flexible substrate having a connecting portion 61 formed in the form of a connecting portion 61.

By configuring the wiring means for the optical pickup as described above, the carriage carrying the optical pickup can be moved along each of the recording surfaces of the disk 10 and reversed to correspond to each of the recording surfaces. However, the flexible substrate does not twist and does not interfere with the performance of the disc.

A winding and feeding means is provided for winding up and feeding out the second flexible section 60 in accordance with the movement of the carriage [7] along the recording surface of the disk.

As shown in FIG. 3, the winding and sending means includes a rotating member 5
a first arm member 63 that is attached in a cantilevered manner to 0 and slidably holds a second flexible portion 60 at its tip;
A pin 64a is attached to the tip of the first arm member so that it can swing freely between the take-up position and the delivery position (=I is cut so that the second '+TJ flexible part 60 can be slid freely at the free end). It consists of a second arm portion 4464 that is held, and a spring member 65 that serves as a first force means for biasing the second arm member toward its winding position. The position of the second arm member 64 shown in FIG.

Next, the structure of the carriage 17 will be explained in detail.

As shown in FIG. 4, FIG. 11 to FIG. 14, the carriage 17 includes an optical system including an objective lens 18, and an optical system that moves the objective lens in its front axis direction (focus direction) and in a direction perpendicular thereto (tracking direction). a first case 70 incorporating a side servo drive device that drives the servo in two directions; a second case 71 that holds the first case and constitutes an optical pickup together with the first case; 71
It has a supporting portion hA' 72 that supports the. The supporting member 72 includes the first guide member 14 and the second guide member 1 described above.
5 at its left end in a slidable manner. Second case 71
Pins 71a and 71b are protruded from both left and right ends of the support member 72, and the pins are slidably and rotatably engaged with elongated holes 72a and 72b formed in the support member 72, respectively. These two elongated holes 72a and 72b extend in the rotation center direction of the turntable 7, that is, in the vertical direction, and are at right angles to each other with respect to the extending direction of the first guide part 14 and the second guide part 15. They are formed apart from each other in a direction different from the direction of the rotation center, that is, in the left-right direction. Also,
Pins 71a and 71b protruding from the second case 71, which is a component part of the optical pickup, extend parallel to the disk supporting surface of the turntable 7. With this configuration, the optical pickup can freely adjust the height position in the direction of the rotation center of the turntable 7 with respect to the support member 72, and the inclination angle of the turntable 7 with respect to the disk support surface, in this case, the turntable 7. The inclination angle in a plane including the center of rotation is freely adjustable.

A first moving portion 73 is swingably attached to the upper end of the supporting member 72. Specifically, pins 72c and 73a that fit into the supporting member 72 and the first moving member 73
and round holes 72d and 73b are formed, thereby allowing the first moving part moon 73 to swing freely. pin 72c
and 73a extend perpendicularly to the rotational center direction of the turntable 7, that is, in the left-right direction, and therefore, the first moving portion (73a) swings within the center including the rotational center direction. The shrine 73 is swingably supported at its central portion, and is formed at its front end.
The above-mentioned second case 71 is formed by the U-shaped notch 73c of J.
pins 71a and 71. It supports b.

A comb-teeth-shaped portion 73d is formed at the rear end of the first moving portion) 73, and an intermediate portion +, I' 74 and 11 are connected to the comb-teeth-shaped portion. Warm 75 is in this intermediate edition 74
Or screwed together. The worm 75 is rotated by a motor 78 through a worm wheel 6 integral with the worm, and a worm 77 meshed with the worm wheel. That is, by rotating the motor 78, the first
The movable part 73 is swung, which causes the second case 71 to move.
The height position of the optical pink-up, including the height, will be adjusted for one week.

On the other hand, in the vicinity of the left end of the carrying member A72, there is a moving date (L) marked in the front and back direction (in the direction of arrow Y and the opposite direction) between the intermediate part 80. A pair of pins 72e protruding from the shaft 72 are slidably engaged with an elongated hole 80a formed in the middle part 80. A long hole 80b is formed extending in the vertical direction (arrow Z direction and its warp/j direction), and is protruded from the free end of the second gauge 71, which is the main part of the optical pickup. This elongated hole 8[]b is slidably engaged with the pins 7] and d that have been inserted.A pin 80c extending in the direction is provided at the rear end of the intermediate portion +480. The pin 80 is inserted into a cam groove 82a formed on the main surface of a cam part moon 82 serving as a disk-shaped second movable part shrine rotatably provided on the lower surface part of 72.
c is slidably engaged. As is particularly clear from Figure 315 (a) and the curve, the cam groove 82a is formed in an annular shape, and therefore its cam surface is endless. Cam club month 82
A gear portion 82b is formed on the circumference of the cam member 82, and the cam member 82 is rotated by a motor 84 via a tooth transmission mechanism 813 including a final stage float 83a that meshes with the gear portion. When the motor 84 rotates, the cam member 82 rotates, and the intermediate portion 80 reciprocates, thereby centering the second case 71 and its pins 71a and 71b (;
The angle of inclination of the optical pick amplifier can be adjusted by moving E.

In this embodiment, an intermediate portion +180 is interposed between the cam member 82 as the second movable part and the second gauge 71, or the cam surface of the cam member 82 is connected to the second gauge 7]. It is also possible to have a structure in which it directly slides into contact with the pin 71cl. However, in this case, it is preferable that the cam portion 82 is provided such that its center of rotation is perpendicular to the tilting surface of the optical pickup.

The above-mentioned gear transmission mechanism 83 and motor 84 constitute a second driving source for rotating the cam member 82 serving as the second moving part. In addition, the second drive a1
;(, the cam member 82, the intermediate part 80, and the supporting part shrine 7
The turn table 7 is rotated by a supporting means that supports the optical pickup so as to be tiltable in a plane including the center of rotation of the turntable 7. A tilt-zero mechanism is constructed without adjusting the optical axis of the optical pickup so that the recording surface of the disk placed on the table 7 and the optical axis of the irradiated light from the optical pickup are always perpendicular to each other.

Further, the motor 78, the worm 77, the worm wheel 76, the worm 75, and the intermediate part 74 constitute a first driving source that applies a driving force to the first moving part 1373 ('ILj). The optical pickup is composed of the first drive source, the first moving part 73, the elongated hole 72a of the holding part 72, and the pins 71a and 71b of the second case 71 that engage with the elongated hole 72a. A height adjusting means for adjusting the height position of the optical pickup in the direction of the rotation center of the turntable 7 is constituted by the support machine 111111 supported so that the height position can be adjusted freely in the direction of the rotation center of the turntable 7. ing.

Note that the second drive source, the cam member 82, the intermediate shrine 80, the first drive source, and the first moving part 73 are collectively referred to as a pickup drive means. The optical pickup is disposed on the carriage 17 at a position closer to the turntable 7 than the pickup driving means. Therefore, even if the disk placed on the turntable 7 has a small diameter, it is easy to move the optical pickup to correspond to the inner circumference of the disk.

As shown in FIGS. 4, 11 to 14, the carriage 17 has a support member 72 which is a component of the carriage.
It has a position adjustment member 90 provided at the right end portion of.

This position adjustment member 90 is swingably supported by a pin 72g protruding from the rear end of the support member 72. pin 7
2g extends in the left-right direction, and therefore, the position adjustment member 90 swings in a plane that intersects the first and second guide paths formed by the first guide part 14 and the second guide part 15, respectively. It is free. Note that the position adjustment section A90 and the support section 4A72 are connected to each other by two screws 90a shown in FIG.

However, this screw 90a is screwed into the support member 72 and inserted into elongated holes 90b and 90C formed in the position adjustment member 90, and by loosening the screw, the position adjustment member 90 can be swung.

Of the rollers 41 and 42 as the aforementioned engagers, the lower roller 4] is provided at the free end of the position adjustment member'90. The other roller 42 is provided at the free end of a leaf spring 91 that is flexibly provided on the position adjustment member 90 in the direction in which the position adjustment member swings. As shown in FIGS. 11 and 12, an adjusting screw 92 is provided as an adjusting means for adjusting the position of the free end of the leaf spring 91 with respect to the position adjusting member 90.

The head of the adjustment screw 92 abuts against the upper surface of the leaf spring 91, and is screwed into a cut-and-raised portion 90e formed on the position adjustment member 90. Note that, as shown in FIGS. 11 and 12, the first moving part 73 is pushed downward (I), and the second case 71 and the position adjustment member 90 are pushed upward, respectively. A spring member 94 is provided.
As shown in FIG. 4, a coil spring 95 is provided that biases the second case 71 in a direction toward the support member 72 and the first moving member 73.

Due to this configuration, a total of two sets of longitudinal guide portions are provided, one set each corresponding to both sides of the disk 10.
44 and the carriage 17 are both set with high precision.

In such a configuration, when assembling the disc player, one of the pair of longitudinal guide parts +J'15, 43 disposed corresponding to, for example, the A side of the disc 10.
5, the supporting member 72 which is a component of the carriage 17;
At the same time, the position of the position adjustment member 90, which is another member constituting the carriage 17, is adjusted by tightening the screw 9.
0a is loosened and adjusted to set the relative position between the engager 41 on the position adjustment member and the other longitudinal guide portion 43 on the side A. Next, the carriage 17 is transported to the 8th side of the disk 10, and the supporting member 72 is placed on one 14 of the pair of longitudinal guides +a' 14, 44 arranged corresponding to the 8th side of the disk 10. At the same time, the position of the free end of the leaf spring 91 is adjusted by the adjusting screw 92, which is the adjusting means, so that the other engager 42 provided on the free end and the other engager 42 on the 8th surface side are engaged. The relative position with the longitudinal guide member 44 is set.

Thus, a total of two sets of longitudinal guide portions, one set corresponding to both sides of the disk 10, are provided +J'15,4314.44
The relative positions of the disc 10 and the carriage 17 are both set with high precision, and the angular position in the tangential direction of the light beam from the optical pickup and the disc recording surface can be adjusted on both sides of the disc 10. This allows angle correction adjustments to be made to suit.

Note that since the above-mentioned position adjustment member 90 is arranged at the right end of the support member 72, it is not possible to operate the position adjustment member from the side of the device when performing the above-mentioned angular position adjustment in the tangential direction. The adjustment work is easy.

As shown in FIGS. 11 and 14, the end of the first case 70 containing the optical system is provided with a light emitting element]00 and a light receiving element 101 for recording the disc 10 placed on the turntable 7. An inclination angle detection means is provided for detecting the relative inclination angle between the surface and the optical axis of the irradiation light emitted toward the surface from the optical pickup.

Although not shown, the double-sided performance optical disc player is provided with various detection means in addition to the tilt angle detection means, and as shown in FIG. 16, each detection means 105
, 106 (M, Q are the control unit (CP
U) 107, and the control unit operates and stops each motor etc. at timings described later in response to each detection signal.

Next, the operation of the double-sided optical disc player having the above-mentioned configuration will be briefly explained with reference to FIG. 17.

The carriage 17 moves from the inner circumferential side to the outer circumferential side of the disk 10 by rolling on the gear 27 or the rack member 30, and when the performance on the lower recording surface of the disk is finished, the carriage 17 moves further outward. When pressed, the second guide portion 15 and the linear guide protrusion 43 of the lower chassis 5 are disengaged, and the holding member 47 is fitted into the holding member 47 . At the same time, the planetary gear 23 provided on the carry run 1f changes to the sun gear 5.
It meshes with the southern part of 5. As a result, the planetary gear 23 begins to roll within the solar center 55. Then, the rotating member 50 carrying the holding portion 47 rotates, and the carriage] 7 is inverted and positioned so as to correspond to the upper recording surface of the disk 10, as shown by the two-dot chain line in FIG. At the same time, the gear 27 meshes with the second rack part (rA29), and the carriage 17 is separated from the holding member 47 and moved onto the first guide part 414 and the guide rail 44.

Thereafter, the lower recording surface of the disc 10 is rotated in the opposite direction to that when it was being played, and the disc 10 is
Playback of the upper recording surface of the disc will begin.

The reverse movement of the carriage 17 from a position corresponding to the lower recording surface of the disk 10 to a position corresponding to the lower recording surface is performed by following the reverse process to that described above.

Additionally, as shown in FIG. 17, the control unit (CPU) 107
When controlling the conveyance mechanism to convey the carriage 17 between the first and second guide mechanisms, a height adjustment means that includes a motor 78 and adjusts the height position of the optical pickup is activated. is once separated from the disk supporting surface of the turntable 7.

On the other hand, once you have finished playing, for example, side A of the disc,
If the optical pickup or its highest position is located close to the 4-disk recording surface using the above-mentioned height adjustment means, the optical pickup cannot be adjusted to the 8-disk recording surface in its current state. If you reverse it, this 8
There is a concern that he will respond too much to the face and come into contact with him. As described above, this problem can be solved by configuring the optical pickup to be partially separated from the disk before performing this reversal operation.

Further, the control unit (CPU) 107 operates the tilt servo mechanism including the motor 84 while the disc is being played, so that the disc recording surface and the optical axis of the irradiated light from the optical pickup are always perpendicular to each other.

Effects of the Invention As described in detail below, in the double-sided optical disc player according to the present invention, the carriage carrying the optical pickup is moved along the first and second recording surfaces of the disc placed on the turntable. A double-sided performance optical disc player that performs both sides of the disc by guiding and driving along a moving path, wherein the first and second moving paths are each formed by a pair of longitudinal guide members that are flat with respect to each other, A transport mechanism for transporting the carriage from one set of longitudinal guide members to the other set is installed, and the carriage carries the optical pickup and moves it toward the set of longitudinal guide members. A supporting part shrine that engages at one end, a position adjusting part 4A provided at the other end of the supporting part 4A so as to be adjustable in position within the music that intersects the first and second movement paths, and one set of the above-mentioned It has two hooks that can engage with the other of the longitudinal guide members, and one force of the two engagers is placed on the position adjustment portion 4A, and the flexible spring portion H is The other of the engaging elements is supported by the free end, and adjustment means for adjusting the position of the free end of the spring member with respect to the adjustable position is provided.

Because of this configuration, the relative positions of the gear ridge and the two sets of longitudinal guide members, one set located on each side of the disk, can be set with high precision.

In such a configuration, assembly of the disc player 1
1! In (2), one end of the supporting member, which is a constituent member of the carriage, is engaged with one of a pair of longitudinal guide members disposed corresponding to, for example, side A of the disk, and at the same time, one end of the supporting member, which is a constituent member of the carriage, is engaged Adjusting the position of the position adjustment part shrine which is a member, the engager on the position adjustment member and the A
Set the relative position with other longitudinal guide members on the surface side. Next, the carriage is conveyed to the 8th side of the disk, and the 2nd supporting part 4A is engaged with one of the pair of longitudinal guide members arranged corresponding to the 8th side of the disk, and at the same time, the above-mentioned spring The position of the free end of the section 4 is adjusted by the adjusting means to set the relative position between the other engaging element provided on the free end and the other longitudinal guide member on the side of the eighth surface.

In this way, the relative positions of the carriage and the longitudinal guide members, which are provided in two sets, one on each side of the disc, and the carriage are set with high precision, and the light beam from the optical pickup and the disc recording surface on both sides of the disc are set with high precision. It is possible to perform angular position adjustment in the tangential direction with respect to the disc, and angular correction adjustment can be made to suit both sides of the disc.

Further, in the double-sided optical disc player according to the present invention, since a spring member carrying the other engaging element in an adjustable manner is provided on the position adjusting member for adjusting the position of one of the engaging elements. When adjusting the position of the engager, the position adjusting part 4 and the spring member do not interfere with each other, thereby minimizing the space required for the operation of both the position adjusting part and the spring part H. This makes it easier to downsize the carriage and, by extension, the player as a whole.

[Brief explanation of the drawing]

1 to 4 are respectively a perspective view, a partially sectional plan view, a right side view, and a front view of the internal structure of a double-sided optical disc player according to the present invention, and FIGS. 5 to 15 are
Partial detailed view of the internal structure shown in Figures 4 to 4, Part 1
FIG. 6 is a diagram showing the control system of the double-sided optical disc player, and FIG. 17 is a diagram illustrating the operation of the double-sided optical disc player. Explanation of the first issue of the main parts of the flowchar for
...First guide part 15...Second guide part 17...Carriage 23...Planetary gear 24 78 84...Motor 25.83...Gear Transmission mechanism 27... Gear 29, 30... Rack member 4], 42... Roller 43... Linear guide protrusion 44... Guide rail 47 ... Holding member 50 ... Rotating member 55 ... Sun gear 56 ... Detachment regulating part shrine 70 ... First case 71 ... Second case 72 ... ...Supporting member 73...First moving part holder 74.80...Intermediate part holder 82...Cam member (second moving part holder) 90...
...Position adjustment part shrine 91...Plate spring 92...Adjustment screw 107...Control unit (CPU)

Claims (2)

[Claims] (1) Double-sided performance in which a carriage carrying an optical pickup is guided and driven along first and second movement paths along both recording surfaces of a disc placed on a turntable to perform performances on both sides of the disc. In the optical disc player, the first and second movement paths are each formed by a set of longitudinal guide members parallel to each other, and a transport mechanism is provided for transporting the carriage from one set of the longitudinal guide members to the other set. the carriage has a carrier member carrying the optical pickup and engaging one of the sets of longitudinal guide members at one end thereof, and a carrier member having the first member at the other end thereof.
and a position adjusting member provided so as to be adjustable in position within a plane intersecting the second movement path, and two engaging members capable of engaging with the other of the set of longitudinal guide members, One of the engagers is placed on the position adjusting member, the other of the engagers is supported by the free end of the flexible spring member in the plane, and the position of the free end of the spring member is adjusted by the position adjusting member. What is claimed is: 1. A double-sided performance optical disc player, characterized in that it has an adjusting means for adjusting. (2) The double-sided optical disc player according to claim 1, wherein the position adjustment member is disposed on an end surface parallel to the surface at a side end of the support member.