JPH0525089Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a double-sided optical disc player.

BACKGROUND ART A double-sided optical disc player is known in which two optical pick-up means are provided on both sides of a disc placed on a turntable so that performances on both sides of the disc can be performed without performing an eject operation. . Such a double-sided optical disc player requires two expensive optical pickup means, resulting in high costs.

Therefore, a carriage carrying an optical pickup means is guided and driven along first and second movement paths along one of both recording surfaces of a disk placed on a turntable to perform double-sided play on the disk. A player has been proposed, for example, in Japanese Patent Application No. 130717/1983. In this double-sided disc player, the first and second travel paths are each formed by a set of longitudinal guide members parallel to each other, and the carriage is conveyed from one set of the longitudinal guide members to the other set. It has a conveyance mechanism. The carriage also has a pair of engagement portions that engage each of the sets of longitudinal guide members.

By the way, it is desirable that the optical axis of the light beam emitted from the optical pickup means be perpendicular to the recording surface of the optical disk, and the mechanism of the guide member forming the carriage or the first and second moving paths should be provided with an angle correction adjustment mechanism. Adjusting the target position.

However, since the assembly accuracy of the parts and the dimensional accuracy of the parts themselves are different, it is not always possible to share the angle correction adjustment position of the carriage for each of the first and second movement paths, but rather
It is preferable to separately adjust the angle correction of the carriage with respect to the movement path, and in a double-sided disc player using a single carriage, it is difficult to make preferable angle correction adjustment for both the first and second movement paths. .

Summary of the invention The present invention has been made in view of the above points, and its purpose is to provide a disc player that can play both sides of a disc using a single optical pickup means, and is compatible with both sides of the disc. An object of the present invention is to provide a double-sided optical disc player that can perform angle correction adjustment.

The double-sided optical disc player according to the present invention is
Carriage 1 carrying optical pickup means
7, and a first guide member along one recording surface of the disk formed by a pair of longitudinal guide members parallel to each other on the recording surface side of each disk 10 placed on the disk supporting surface of the turntable. movement paths 15, 43 and a second movement path 14, 44 along the other recording surface, and a transport mechanism 47, 50, 52, 55 for transporting the carriage between the first movement path and the second movement path; 56, wherein the carriage is guided and driven along the first movement path and the second movement path to play both sides of the disc, wherein the carriage is guided along the first movement path and the second movement path. and a pair of engaging portions 21, 41, and 42, each of which engages with a set of longitudinal guide members forming a second movement path, one of the pair of engaging portions being connected to the two engaging elements 4.
1 and 42, one of the two engaging elements 41 engages when the carriage is located on the first moving path, and the other 41 engages when the carriage is located on the second moving path.
2 are engaged with each other, and support means 20a, 42a, 42 are capable of freely adjusting the position of at least one of the two engaging elements in a direction perpendicular to the disk carrying surface.
It is characterized by being supported by b.

Embodiments Hereinafter, a double-sided performance 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, a player housing (not shown) of the double-sided optical disc player includes a lower chassis 5 and an upper chassis connected by, for example, three leg members 1, 2, and 3. A chassis 6 is provided. In addition, in the figure, the arrow Y direction is the front, and the arrow X direction is the left. Further, arrow Z indicates upward.

As shown in FIGS. 2 and 3, the lower chassis 5
A turntable 7 is provided at the front end of the disc 1, and a disk 10 is clamped onto the turntable by a clamper 9. Figures 1 and 3
The disk 10 shown in Figures and Figure 4 has a diameter of approximately 30 mm.
cm, and is made by bonding two circular substrates, each having a signal recording layer, with each signal recording layer on the inside. Furthermore, as shown in Fig. 2, the disc player has a diameter of about 20 mm.
cm, 12 cm discs 11 and 12 can also be played. Further, although not shown in the drawings, the turntable 7 has a centering member that engages with the center hole of the disks of each diameter to center the disks.

A pair of cylindrical longitudinal guide members 14 and 15 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. are arranged and attached to the upper chassis 6 and the lower chassis 5, respectively. A carriage 17 is provided so as to be freely engageable and detachable from the guide members 14 and 15. The carriage 17 is an optical pick-up consisting of an optical system including an objective lens 18 and a servo drive mechanism that servo drives the objective lens in two directions: the direction of its optical axis (focus direction) and the direction perpendicular thereto (tracking direction). Pickup case with built-in means 19
and a frame 2 that supported the pick-up case.
0, and a block 21 as an engaging portion that is fixed to the left end of the frame and can be slidably fitted to the first and second guide members 14 and 15. The optical pickup means emits light onto the recording surface of the disk and reads recorded information based on changes in the reflected light.

A planetary gear 23 is provided at the rear end of the carriage 17, and is rotationally driven via a gear transmission mechanism 25 by a motor 24 mounted on the carriage. In addition, the motor 24 and the gear transmission mechanism 2
5 is not shown in FIG. Another gear 27 is provided at the left end of the carriage 17, and this gear 27 is also connected to the motor 24 via a gear transmission mechanism 25.
It is driven to rotate by. A pair of rack members 29 and 30 are arranged parallel to the aforementioned guide members 14 and 15 and sandwich the disk 19 vertically between each other.
is located. The gear 27 described above can mesh with both of these rack members 29 and 30. As is clear from FIGS. 1 and 2, both rack members 29 and 30 have rear end portions 29a and 30 relative to their main bodies.
0a is separated. The rear end portion 29a of the rack member 29 is attached to a bracket 32 fixed to the lower surface of the upper chassis 6, and the rear end portion 30a of the other rack member 30 is attached to the lower chassis 5. . The respective rear end portions 29a, 3
0a is attached to the bracket 32 and the lower chassis 5 with screws through flexible parts 29b and 30b, respectively, and when a force of a predetermined magnitude or more is applied to each rear end part, the flexible parts 29b and 30b Upon bending, each of the rear end portions moves forward (in the direction of arrow Y), that is, in a direction away from a conveyance mechanism to be described later.
However, rearward movement (in the direction opposite to the direction of arrow Y) is restricted because stoppers (not shown) abut each rear end portion.

As shown in FIGS. 1, 2, and 5, the main body of the left rack member 30, excluding the rear end portion 30a, is mounted on a bracket 34 fixed to the lower chassis 5 with a pin at approximately the center. 35 and is attached to be movable and swingable in the directions toward and away from the gear 27. Note that claw members 30c are formed on the lower surface of both ends of the main body, and since the claw members engage with the bracket 34, the swinging of the main body is restricted within a predetermined range.
As is particularly clear from FIG.
A pair of front and rear coil springs 36 are provided as biasing means for biasing in a direction approaching 7.
Due to this configuration, backlash between gear 27 and rack member 30 is eliminated.

As shown in FIGS. 1 and 4, the main body of the rack member 29 on the right side, excluding the rear end portion 29a, is attached to the bracket 32 via a pin 38 in a manner similar to the rack member 30 on the left side. installed. In addition, the rack member 29 is connected to the bracket 32.
A claw member 29c that engages with and restricts the swing range of the claw member 29c.
The gear 27 is connected by a coil spring 39.
is being energized to approach .

As shown in Figures 2 to 4, the carriage 1
At the right end of 7 are two rollers 4 as engaging elements.
1 and 42 are provided apart from each other in the vertical direction (arrow Z direction and the opposite direction). The lower roller 41 supported by the support shaft 41a is connected to a linear guide surface 43 provided on the lower chassis 5 in parallel with the guide member 15 (one of a set of longitudinal guide members forming the first movement path). (the other of the set of longitudinal guide members forming the first travel path), the upper roller 42 is attached to the upper chassis 6 on the guide member 14 (the other of the set of longitudinal guide members forming the second travel path). (one of the longitudinal guide members forming the second travel path) mounted parallel to the guide rail 44 (the other of the set of longitudinal guide members forming the second travel path). That is, regarding the roller 41, the linear guide surface 43, which is a part of the lower chassis 5, acts as a longitudinal guide member. Guide member 14
and the guide rail 44 form a second movement path for guiding the carriage 17 along the upper recording surface of the disk 10, and these are collectively referred to as a second guide mechanism. The second guide member 15 and the linear guide surface 43 of the lower chassis 5 form a first movement path that guides the carriage 17 along the lower recording surface of the disk 10. It is collectively called the first guide mechanism.

As shown in FIG. 4, the support shaft 42a of the upper roller 42 of the pair of upper and lower rollers 41 and 42 as engaging elements is inserted into a long hole 20a formed in the frame 20 of the carriage 17.
By loosening the screw 42b screwed onto the support shaft, the position of the roller 42 can be adjusted in its engagement direction, that is, in a plane intersecting the first and second movement paths. Therefore, the relative positions of the pair of engaging portions of the carriage 17 and the two sets of longitudinal guide members located one on each side of the disk can be set with high precision.
That is, when assembling the disc player,
The relative position of one of the pair of longitudinal guide members 15, 43 disposed corresponding to the A surface (for example, the lower surface) of the disk and one engaging portion 21 of the carriage 17 is set, and at the same time the A The relative position between the other longitudinal guide member 43 on the surface side and the first engagement element 41 of the other engagement portion of the carriage 17 is set. Next, the carriage 17 is reversed and conveyed to the B side of the disk by a conveyance mechanism to be described later, and the carriage 17 is moved to one of the pair of longitudinal guide members 14, 44 disposed corresponding to the B side of the disk. Set the relative position of the carriage 17 with one of the engaging portions 21, and at the same time set the relative position of the carriage 17 with the other longitudinal guide member 44 on the side B side.
The relative position of the other engaging portion of No. 7 with respect to the second engaging element 42 is set. In this case, since the position of the second engaging element 42 is adjustable, the relationship between the engaging portion of the carriage 17 and the longitudinal guide members, which are provided in two sets, one on each side of the disk, is adjustable. Both positions can be set with high precision.

The rear end portions of the guide members 14 and 15 are formed into a pointed shape, and the carriage 17 can be freely engaged with and disengaged from each of the guide members 14 and 15 at the pointed end portions. At the rear of each guide member 14, 15, a pointed shaft-shaped holding member 47 is arranged to fit in place of each guide member and hold the carriage 17 detached from each guide member. Also,
Although not shown, a means for preventing the carriage 17 fitted into the holding member 47 from falling out from the holding member is provided, and this means together with the holding member 47 constitutes a gripping member that grips the carriage 17. are doing.

Here, as shown in FIGS. 2 and 4, a support shaft 14a for attaching the guide member 14 to the upper chassis 6 is formed on the upper chassis 6 so as to extend in the left-right direction (the direction of the arrow X and the opposite direction thereof). long hole 6a
A screw 14 is inserted into the support shaft and screwed into the support shaft.
By loosening b, the position of the guide member 14 can be shifted in the left-right direction. That is, the position of the guide path of the second guide mechanism including the guide member 14 can be adjusted within a plane perpendicular to the rotation axis of the turntable 7 (shown in FIG. 3). With this configuration, the extension line of the movement locus of the optical axis of the irradiation light as the optical pickup means 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 disk player, the relative position of the first guide mechanism that guides the carriage 17 and the turntable 7 to guide the carriage 17 along the A surface (for example, the bottom surface) of the disk is set, and the radiation is emitted toward the A surface. After positioning the rotation axis of the turntable 7 on the extension line of the movement trajectory of the optical axis of the light, the position of the guide path of the second guide mechanism is adjusted as described above, and the irradiation light is emitted to the B side of the disk. The extension line of the movement locus of the optical axis is made to intersect the rotation axis of the turntable. In this way, since the extension line of the movement locus of the optical axis of the irradiation light and the disk rotation axis 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.

As shown in Figures 1 to 4 and Figure 6,
Carriage 1 separated from the first and second guide mechanisms
A holding member 47 that fits into and holds the holding member 7 is attached to the plate-shaped rotating member 50 so as to extend forward (in the direction of the arrow Y). The rotating member 50 has a support shaft 5 that is implanted in a mounting plate 52 that is fixed to the rear end of the lower chassis 5 and extends forward (in the direction of the arrow Y).
It is rotatably supported by 3. Further, a half-moon-shaped internal sun gear 55 is attached to the mounting plate 52 coaxially with the rotating shaft of the rotating member 50 . Details of the sun gear 55 are shown in FIGS. 7a and 7b. The rotating member 50 is provided to rotate along a plane that intersects, in this case, perpendicularly, to the direction in which the carriage 17 is guided by the first guide mechanism and the second guide mechanism described above. The planetary gear 23 provided on the carriage 17 can mesh with the teeth 55a of the sun gear 55 mentioned above. However, the planetary gear 23 is inserted into the insertion hole 50a formed in the rotating member 50.
(shown in FIG. 1) and meshes with the sun gear 55.
A flange-shaped withdrawal regulating member 56 is integrally provided on the outer circumferential portion of the sun gear 55 and slides on the front side surface of the planetary gear 23 to restrict the planetary gear from disengaging from the meshing state with the sun gear 55. There is.

The separation regulating member 56 is provided around the central axis of the sun gear 55 within a predetermined angular range. As is particularly clear from FIGS. 7a and 7b, both ends of the withdrawal regulating member have 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. is formed. Therefore,
The portion where the tapered surface is formed forms a convex portion 56b that protrudes forward (in the direction of arrow Y) with respect to other portions of the separation regulating member. Rotating sun gear 5
The planetary gear 23 meshed with the tooth portion 55a of No. 5 immediately starts rolling along the sun gear.
At the beginning of rolling, it is guided by this tapered surface 56a and pulled rearward (in the opposite direction of the arrow Y direction), and is deeply and reliably engaged with the tooth portion 55a of the sun gear 55.

The above-mentioned rotating member 50, the sun gear 55, the planetary gear 23, and the detachment regulating member 56 formed integrally with the sun gear 55 allow the carriage 17 to be connected to one of the first and second guide mechanisms described above. A conveyance mechanism is configured to reversely convey from one engagement/disengagement position to the other engagement/disengagement position. Also, the above-mentioned pair of rack members 29 and 30 and the carriage 17
The above-mentioned first
and a driving means for moving the carriage 17 on the second guide mechanism and driving the transport mechanism to reverse the carriage.

Here, as described above, the rear end portions 29a and 30a of the pair of rack members 29 and 30 are separated from their rest positions with respect to the transport mechanism (arrow Y
The reason why it is possible to move in response to a force of a predetermined magnitude or more in the direction) will be explained.

As described above, the carriage 17 is driven by itself on each of the pair of rack members 29 and 30 by the rotation of the gear 27, and during this time the carriage 17 is reversed between the respective rack members by the transport mechanism. However, in this configuration, a reaction force accompanying this rolling is applied from the rack member side to the gear 27 rolling on the rack member. Further, another reaction force accompanying the reversal of the carriage 17 by the conveyance mechanism including the sun gear 55 is transferred from the sun gear side to the carriage 17 via the planetary gear 23.
join. Since the planetary gear 23 meshes with the sun gear 55 when the gear 27 is about to finish rolling on the rack member, the two reaction forces mentioned above counteract each other at this time, and the carriage 17 is forced to stop rolling on the rack member. It may become impossible to move between the sun gear 55 and the sun gear 55. As described above, by configuring at least a portion of the rack member to be able to move forward when a force of a predetermined magnitude or more is applied, the antagonistic state of these two reaction forces is avoided, and the carriage 17 A smooth transition can be made between the member and the transport mechanism.

In addition, in this embodiment, the rack member 2
At least a part of 9, 30 forward (direction of arrow Y)
However, instead of this, the same effect as described above can be obtained by having at least a part of the pair of rack members be distorted and shortened in the direction of extension by a force of a predetermined magnitude or more. play.

As shown in FIG. 6, a holding member 47 that fits and holds the carriage 17 and engages and disengages it alternately from the first and second guide mechanisms described above.
The screw 47a and the spring washer 47 are attached to the rotating member 50.
It is attached by b. The screw 47a is loosely fitted into a round hole 50b formed in the rotating member 50, so that the holding member 47 can swing freely around its base end. In addition, the spring washer 47
b has a wavy cross-sectional shape, and the holding member 47
A bias force is applied to the home position shown by the solid line in FIG.

By making the holding member 47 swingable as described above, even if the holding member or the first and second guide members are mounted on the mounting member in a state slightly deviated from their normal positions, the carriage 17 When attempting to move between these members, the holding member 47 swings appropriately, and the carriage 17 is guided thereby and smoothly moves between the holding member 47 and the guide members 14 and 15. In this embodiment, the entire holding member 47 is swingable, but 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 absorbs the installation error and that the portion where the carriage 17 is to be guided is bendable and resilient.

As is clear from FIGS. 1 and 4, the gear 27 provided on the carriage 17 and capable of meshing with each of the pair of rack members 29 and 30 has its rotation axis intersecting the direction of extension of each of the rack members. The teeth of the pair of rack members are formed so as to face the conveying range, ie, the reversing range, of the holding member 47. Because of this configuration, while the carriage 17 is being moved 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 means shifts between the normal rotation position and the reverse rotation position where the optical pickup means 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. 1, 3, 4, and 8, wiring means is provided for supplying power to the optical pickup means on the carriage 17 and for transmitting electrical signals. As shown in the figure, the wiring means includes a first flexible part 59 that is arranged to sandwich the rotating member 50 in a plane perpendicular to the rotational axis, and a first flexible part 59 that is arranged so as to be flexible in a plane parallel to the rotational axis of the rotating member 50. a second flexible part 6 connected to the optical pickup means on 17 and to the motor 24;
0 and a connecting portion 61 that is fixed to the rotating member 50 and electrically connects the first and second flexible portions.

By configuring the wiring means for the optical pickup means as described above, the carriage carrying the optical pickup means can move along each of the recording surfaces of the disk 10 and correspond to each of the recording surfaces. Even when it is turned over, 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 and feeding the second flexible section 60 in accordance with the movement of the carriage 17 along the disk recording surface.

As shown in FIGS. 3 and 4, the winding and sending means includes a second flexible section 60 that is attached to the rotating member 50 in a cantilevered manner and slidably holds the second flexible section 60 at its tip. The first arm member 63 is attached to the tip of the first arm member by a pin 64a so as to be swingable between the winding position and the sending position, and the second flexible part 60 can be slid at the free end. The second held in
It consists of an arm member 64 and a spring member 65 as a biasing means for biasing the second arm member toward its winding position. The position of the second arm member 64 indicated by a solid line in FIG. 3 is the delivery position, and the position indicated by a two-dot chain line is the winding position. Further, the second arm member 64 is not shown in FIG.

Next, the operation of the double-sided performance disc player having the above configuration will be briefly explained.

As the gear 27 rolls on the rack member 30, the carriage 17 moves from the inner circumferential side to the outer circumferential side of the disk 10, and when the performance on the lower recording surface of the disk is completed, the carriage 17 moves further outward. The lower chassis 5 is moved away from the guide member 15 and the linear guide surface 43 of the lower chassis 5, and is fitted into the holding member 47. Additionally, a projecting portion 20a formed on the frame 20 of the carriage 17 (shown in FIG. 1)
is a clamping member 65 (first
(shown in the figure). At the same time, the planet gear 23 provided on the carriage 17 meshes with the teeth of the sun gear 55. As a result, the planetary gear 23
starts rolling inside the sun gear 55. Then, the rotating member 50 carrying the holding member 47 rotates, and the carriage 17 goes through the state shown in FIG. 9, and then is reversed and positioned to correspond to the upper recording surface of the disk 10, as shown in FIG. Ru. At the same time, the gear 27 meshes with the upper rack member 29,
The carriage 17 is detached from the holding member 47 and moved onto the guide member 14 and the guide rail 44. Thereafter, the disc is rotated in the opposite direction to the direction in which the lower recording surface of the disk 10 was being played, and the upper recording surface of the disk 10 begins to be played.

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

In this embodiment, when a force of a predetermined magnitude or more is applied to each of the rear end portions 29a and 30a of the pair of rack members 29 and 30, the rear end portions are separated from the sun gear 55 in the direction (arrow At the same time, as shown in FIG. 11, flexible parts 55c are provided at both ends of the sun gear 55, and the tooth part 55d supported by the flexible part is moved relative to the remaining tooth parts. This avoids antagonism between the two reaction forces relatively applied to the carriage 17 from both the rack member side and the sun gear 55 side.

FIGS. 12 and 13 show modified examples of the holding member that holds the carriage 17. FIG. The holding member 47 shown in FIG. 12 is loosely fitted into a flexible rod 68 implanted in a base member 67 attached to the rotating member 50, and is fixed to the free end of the flexible rod. ing. Further, the holding member 47 shown in FIG. 13 loosely fits into a coil spring 69 attached at one end to a base member 67 fixedly provided on the rotating member 50, and the other end of the coil spring is attached to.

In the configuration shown in FIGS. 12 and 13, even if the holding member 47 is mounted on the rotating member 50 with a slight deviation from the normal position, the carriage 17 can be moved from the above-mentioned guide members 14 and 15 to the holding member 47. 47, the flexible rod 68 and the coil spring 69 bend in a plane perpendicular to the direction of their extension, thereby bending the holding member appropriately and smoothly guiding the carriage 17. hold it.

Effects of the Invention As detailed above, the double-sided performance optical disc player according to the present invention includes a carriage 17 carrying an optical pickup means, and a disc 10 placed on the disc carrying surface of the turntable.
A first moving path 15, 43 along one recording surface of the disk and a second moving path 14 along the other recording surface are formed by a pair of longitudinal guide members parallel to each other on each recording surface side. , 44, and a transport mechanism 47, 50, 52, which transports the carriage between the first movement path and the second movement path.
55, 56, and the carriage is connected to the first
A double-sided performance optical disc player that performs performance on both sides of the disc by being guided and driven along a movement path and the second movement path, wherein the carriage is guided along the first movement path and the second movement path.
A pair of engaging parts 21, 41 that respectively engage with a set of longitudinal guide members forming a moving path and a second moving path, respectively.
and 42, one of the pair of engaging parts is composed of two engaging elements 41 and 42, and when the carriage is located on the first movement path, one of the two engaging elements 41 is and the other 42 engages when the two engaging elements are positioned on the second movement path, and at least one of the two engaging elements is a support means whose position in a direction perpendicular to the disk carrying surface can be freely adjusted. 20a, 42a, 42b.

Because of this configuration, one
The relative positions of the two pairs of longitudinal guide members and the pair of engaging portions of the carriage are both set with high precision. That is, when assembling the disc player, one of the pair of longitudinal guide members arranged corresponding to the A side of the disc
and one engaging part of the carriage, and at the same time set the relative position of the other longitudinal guide member on the side A side and the first engaging element of the other engaging part of the carriage. . Next, the carriage is conveyed to the B side of the disk, and the relative position of one of the pair of longitudinal guide members arranged corresponding to the B side of the disk and one engagement part of the carriage is set, At the same time, the relative position of the other longitudinal guide member on the side B side and the second engagement element of the other engagement portion of the carriage is set. In this case, the first engagement element and the second engagement element
Since the position of either one of the second engaging elements is adjustable, the relative positions of the engaging portion of the carriage and the longitudinal guide members, which are provided in two sets, one on each side of the disk, are both high. It is possible to adjust the angular position in the tangential direction between the light beam from the optical pickup means and the disk recording surface on both sides of the disk, and to perform angle correction adjustment suitable for both sides.

[Brief explanation of the drawing]

1 to 4 are a perspective view, a plan view with a partial cross section, a right side view, a front view with a partial cross section, and FIGS. 5 through 4, respectively, of the internal structure of a double-sided optical disc player according to the present invention. Figure 8 is from Figures 1 to 4.
FIGS. 9 and 10 are diagrams for explaining the operation of the double-sided optical disc player, and FIGS. It is a figure which shows the example of a partial modification of the internal structure shown in the figure. Explanation of symbols of main parts, 5...Lower chassis, 6
...Upper chassis, 7...Turntable, 10,
11, 12... Disc, 14... Guide member, 1
5... Guide member, 17... Carriage, 23...
Planetary gear, 24... Motor, 25... Gear transmission mechanism, 27... Gear, 29, 30... Rack member,
41, 42...roller, 43...linear guide surface,
44... Guide rail, 47... Holding member, 50...
... Rotating member, 55 ... Sun gear, 56 ... Separation regulating member, 59 ... First flexible part, 60 ... Second flexible part, 61 ... Connection member, 63 ... First arm member , 64...second arm member.

Claims (1)

[Claims for Utility Model Registration] A carriage 17 carrying an optical pickup means and a set of longitudinal guide members parallel to each other on the recording surface side of each of the disks 10 placed on the disk carrying surface of the turntable. A first recording surface along one recording surface of the disk thus formed.
movement paths 15, 43 and a second movement path 14, 44 along the other recording surface, and a transport mechanism 47, 50, 52, 55 for transporting the carriage between the first movement path and the second movement path; 56, wherein the carriage is guided and driven along the first movement path and the second movement path to play both sides of the disc, wherein the carriage is guided along the first movement path and the second movement path. and a pair of engaging members 21, 41, and 42, each of which engages with a set of longitudinal guide members forming a second movement path, and one of the pair of engaging parts has two engaging elements 4.
1 and 42, one of the two engaging elements 41 engages when the carriage is located on the first moving path, and the other 41 engages when the carriage is located on the second moving path.
2 are engaged with each other, and support means 20a, 42a, 42 are capable of freely adjusting the position of at least one of the two engaging elements in a direction perpendicular to the disk carrying surface.
A double-sided performance optical disc player characterized in that it is supported by b.