JPH0529968B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a disc player that records information on a disc-shaped recording medium (hereinafter referred to as a disc) or reproduces recorded information, and particularly a disc player that is capable of double-sided recording or reproduction. This invention relates to an optical disk device.

2. Description of the Related Art In recent years, optical disk players that record or reproduce videos and the like using optical disks as recording media have become widespread. In general, the disks used in such disk players usually have signals recorded on both the front and back sides, and conventionally, by moving and reversing one optical pickup so that it corresponds to both sides of the disk, signals can be recorded on both sides of the disk. Optical disc players configured to enable playback have been proposed.

A schematic configuration of a conventional optical disc player capable of double-sided playback will be described below. FIG. 8 shows a schematic configuration of a player that plays back both sides (side A and side B) of a conventional optical disc (hereinafter referred to as a disc). In FIG. 8, 100 is a disk on which signals are recorded on sides A and B;
1 is an optical pickup for reproducing the signal recorded on the disk 100; 102 is a rotatable roller 105 on which the pickup 101 is placed;
The optical blocks 104 and 110 provided with the optical blocks 104 and 110 are guide shafts configured to fit into fitting holes provided in the optical block 102 and hold the optical block 102.
The main base member 103 and the sub-base member 109 provided on the A side and the B side of the disc 100 are respectively disposed in parallel with the radial direction of the disk 100.

106 and 111 are the main base member 10
3 and the sub-base member 109 to regulate the vertical movement of the roller 105; 107 is the optical block 10;
Drive gears 108 and 1 to which the power of a motor (not shown) disposed in 2 is transmitted through a plurality of reduction gears (not shown) to be rotationally driven;
Reference numeral 12 is formed with a toothed portion that meshes with the drive gear 107, and extends parallel to the guide shaft 104 to the main base member 103 and the sub-base member 109.
This is a rack member placed in the

The operation of the conventional double-sided playable optical disc player configured as described above will be described below. An optical block 102 on which an optical pickup 101 is mounted is fitted and held by a guide shaft 104 disposed on a main base member 103, and is connected to the guide shaft 104 and a rotatable roller 105 disposed at the other end. , moves in the radial direction of the disk (in the direction perpendicular to the plane of the drawing) while being restricted from moving in a direction perpendicular to the movement direction by the roller regulating member 106.

The power for moving the optical block 102 is provided by a motor and a plurality of reduction gears (drive mechanisms) disposed within the optical block 102, and the power of this drive mechanism is transferred to the drive gear 1.
07 to rotationally drive it, and the drive gear 105 meshes with a rack member 108 disposed on the main base member 103, so that the optical block is moved along the rack member 108. It's summery.

In other words, the structure is such that the optical block 102 itself having a drive mechanism moves, that is, the optical block itself moves by itself.

By the way, when reproducing the B side, the optical block 102 is rotated by a reversing mechanism (not shown).
The main base member 1 is rotated 180° until
The optical block 102 which was regulated and held by the guide shaft 104 and the roller regulating member 106 disposed in the sub-base member 10
The drive gear 105 meshes with the rack member 112 and moves in the radial direction of the disk, while movement in a direction perpendicular to the moving direction is restricted by a guide shaft 110 and a roller regulating member 111 provided at the rack member 112.

Problems to be Solved by the Invention However, in the conventional configuration, the driving force (driving mechanism) for moving the optical block 102 is
Since the optical block 102 is disposed within the optical block 102, the optical block itself becomes large in size and weight, requiring a large driving force, and it is difficult to achieve a high-speed reversal operation.

Another problem is that the vibration of the drive mechanism disposed in the optical block 102 is directly transmitted to the optical pickup, deteriorating the reading performance of signals recorded on the disk.

The present invention solves the above-mentioned conventional problems,
It is an object of the present invention to provide an optical disk device that has a simple configuration, is excellent in size, and has high-speed and stable reading performance, and is capable of double-sided recording or reproduction.

Means for Solving the Problems In order to achieve this object, the optical disk device of the present invention records or records information on at least one of the first surface and the second surface of a disk-shaped recording medium. an optical pickup means for reproducing the recorded information; and an optical pickup means for moving the optical pickup means in the radial direction on the first surface and the second surface of the disk-shaped recording medium, and moving the optical pickup means from the first surface side to the second surface side. U from surface side or second surface side to first surface side
a pick moving means for moving the optical pick-up in a letter-like shape; The drive motor is disposed outside the movable base and transmits its driving force from the outside via the flexible power transmission member.

Effect: With this configuration, it is possible to realize a double-sided recording or reproducing optical disc device that has a simple configuration, is excellent in miniaturization, and has high-speed and stable reading performance.

Embodiment An embodiment of the optical disk device of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of the main body of the optical disk device.
FIG. 2 is a diagram showing the internal structure of the first base member, FIG. 3 is a diagram showing the interior of the second base member, and FIG. 4 is a perspective view of the optical pickup means.

In FIGS. 1 to 4, 1 is a disk on which information is recorded on both surfaces, a first surface in the direction of arrow A and a second surface in the direction of arrow B. Reference numeral 2 denotes an optical pickup means for reproducing the information recorded on the disk 1, which is integrally placed on the moving base (hereinafter simply referred to as the pick-up means), and 6 denotes a first optical pickup means.
a guide shaft 4 and a first shaft holding member 5 partially formed in a tapered shape. A first guide means 33 guides one end of the optical pickup means 2 between the outer periphery thereof, and a second shaft holding member 31 and a third shaft holding member 33 are partially formed in a tapered shape with respect to the second guide shaft 30. a second member 32 for guiding one end of the optical pickup means 2 between the inner and outer peripheries of the second surface of the disk 1 when reproducing information on the second surface of the disk 1; It is a guiding means.

3 are these first and second guide means 6, 33
on the first and second surfaces of the disk 1, respectively.
a first base member integrally formed in a U-shape attached to the surface side of the first guide means 6;
One end of the first guide shaft 4 is held by a first shaft holding member 5, and positioning holes 10 and 11 formed in this first shaft holding member 5 are used.
are fitted into positioning protrusions 12 and 13 formed on the first base member 3, and the other end of the first guide shaft 4 is fitted into a positioning groove 14 formed on the first base member 3. They are fitted and positioned, and are fixed to the first base member 3 by a fastening member 15.

Similarly, the second guide means 33 is such that one end of the second guide shaft 30 is held by a second shaft holding member 31, the other end is held by a third shaft holding member 32, and the second guide shaft 30 is held by a third shaft holding member 32. It is attached to 3. Reference numeral 80 denotes a rotary drive means for rotationally driving the disk 1 between the first and second guide means 6 and 33; 16 is a flexible power transmission member such as a timing belt, and rotatable belt rollers 18 and 19; , 20 and the flexible power transmission member 16 by means of an adjustment roller 23 and a drive pulley member 24 disposed on a tension adjustment means 22 rotatable about a rotation shaft 21. and is arranged on the first base member 3.

Reference numeral 25 denotes a drive motor disposed on the first base member 3. The power of this drive motor 25 is transmitted to the drive pulley member 24 via a motor belt 26 and deceleration members 27, 28, 29. The drive force from the drive motor 25 is transmitted to the flexible power transmission member 16 by the pulley member 24 . The drive pulley member 24 is formed with a recess 36 into which a coupling member, which will be described later, is fitted and held.

17 is a coupling member provided at one end of the optical pickup means 2 and coupled to the flexible power transmission member 16; 7 is a coupling member 6 disposed on the first base member 3; , 33 and are integrally formed in a U-shape with guide grooves 8 and 34 for guiding the optical pickup means 2, and a second base member 3 that is fitted and fixed to the first base member 3 and integrated therewith. The base member 39 is a transmission arm that is provided inside the second base member 7, rotates integrally with the drive pulley member 24, and has a notch 38 in a portion thereof.

At one end of the optical pickup means 2, there is a bearing portion 45 that fits with the guide means 6, 33, and at the other end, the optical pickup means 2 is guided by a guide groove 8 provided in the second base member 7. A first roller member 9, which is a support member that supports the first roller member 9, and a second roller member 35, which is a support member that is guided by the other guide groove 34, are provided. The lower side of the bearing portion 45 is provided with an opening for escape of the shaft holding members 5 and 31.

The operation of the optical disk device of the present invention configured as above will be explained. First, when reproducing information on the first surface of the disk 1, the bearing portion 45 formed at one end of the optical pickup means 2 is fitted into the first guide shaft 4 of the first guide means 6. The first roller member 9 disposed at the other end of the optical pickup means 2 is held in a direction perpendicular to the moving direction of the optical pickup means 2. First groove 8 formed in base member 7
By being engaged with and guided by the optical pickup means 2, the optical pickup means 2 is held accurately and the movement of the optical pickup means 2 is guided, and the coupling member 17 provided on the optical pickup means 2 is The drive motor 25 is coupled to the power transmission member 16.
The driving force is transmitted to the optical pickup means 2, and the optical pickup means 2 moves in the radial direction of the disk 1 along the guide.

Further, when reproducing information on the second surface of the disk 1, the bearing portion 45 formed at one end of the optical pickup means 2
The second guide shaft 30 is fitted into and held at the second guide shaft 30 to restrict the movement of the optical pickup means 2 in a direction orthogonal to the moving direction. The second roller member 35 engages with and is guided by the second groove 34 formed in the second base member 7, thereby holding the optical pickup means 2 with high precision while moving the optical pickup means 2 in the radial direction of the disk 1. Move to.

At this time, the first roller member 9 exists in the space and is not regulated anywhere, and this also applies to the second roller member 35 on the first surface. It exists and is not regulated anywhere.

By the way, when the optical pickup means 2 moves from reproducing the first surface of the disk to reproducing the second surface, the coupling member 17 provided at one end of the optical pickup means 2 is connected to the flexible power transmission member 16. A second roller member 35 provided at the other end is formed into a transmission arm 39 that is connected to the drive pulley member 24 and rotates integrally with the drive pulley member 24. cutout 3
8 to smoothly transfer the optical pickup means 2 to the second side of the disk.

Next, the optical pickup means 2 will be explained. FIG. 4 is a perspective view of the optical pickup means 2 used in the optical disk device of the present invention, FIG. 5 is a diagram showing the height mechanism inside the optical pickup means, and FIG. 6 is a diagram showing the inside of the optical pickup means. FIG. 7 is a diagram showing the tilt mechanism, and FIG. 7 is a side view taken from direction C in FIG. 4.

4 to 7, an optical pickup member 40 for detecting a signal from the disk 1, an optical axis of the optical pickup member 40, and an end surface of a base 42 on which a tilt sensor 41 for detecting the tilt angle of the disk 1 are mounted. is the first in the direction perpendicular to the optical axis as shown in Figure 6.
A support shaft 43 and a second support shaft 44 are erected. A pick base member 46 on which a bearing portion 45 that fits and is held by the first and second guide shafts 4 and 30 is formed with two parts.
Elongated hole grooves 47 and 48 are formed in several places, and a first support shaft 43 and a second support shaft 44 that are set on the base 42 are formed in the elongated hole grooves 47 and 48.
is inserted.

Further, a base shaft connecting member 51 is provided which is rotatable around a fulcrum A49 and a fulcrum B50 of the pick base member 46, and the base shaft connecting member 51 has a pair of notches A52 and B ( (not shown) is formed, and the first support shaft 4 is formed so that the base 42 can be moved up and down.
3 and second support shaft 44 .
A motor 54 to which a worm 53 is attached, a screw shaft 5 that meshes with the worm 53 and has a threaded portion.
Worm wheel 56 with 5 pressed into it, screw shaft 5
The height base member 59 includes two bearing members 57 (only one is shown) supporting both ends of the pick base member 59 and a driving plate 58 having a threaded portion that engages with the threaded portion of the screw shaft 55. The driving plate 58 and the base shaft connecting member 51 engage with each other at the notch 60 to move the optical pickup member 40 up and down. operates to maintain a constant distance.

Further, the base 42 is always restricted in one direction by the spring member 62. Further, a tilt pin 63 disposed parallel to the second support shaft 44 erected on the base 42 engages with a notch 65 of a tilt drive plate 64 disposed on the pick base member 46. The cam pin 66 erected on the tilt drive plate 64 engages with a cam groove 68 formed in the cam gear member 67. The cam gear member 67 is decelerated and rotationally driven by a motor 70, a worm 71, and a worm wheel 72 disposed on the tilt base member 69, and operates the tilt drive plate 64 in the direction of arrow D to rotate the first support shaft. 43 and a second support shaft 44, the base 42 is operated so as to always maintain the optical axis of the optical pickup member 40 and the disk surface at right angles even when the disk is warped.

By the way, as shown in FIG. 7, the pick base member 46 includes a first roller base member 73 on which the first roller member 9 is disposed, and a first roller base member 73 that is fixed to the first roller base member 73 and the second roller member 9. A second roller base member 74 made of a flexible material with a roller member 35 planted thereon is disposed, and the first roller base member 73 has a regulating pin A planted on the end face of the pick base member 46, The first roller member 9 is configured to be able to rotate about a fulcrum 77 while being regulated in a direction perpendicular to the plane of the drawing by B75, 76, and adjusts the height of the first roller member 9. Further, the second roller base member 74 made of a flexible material adjusts the height of the second roller base member by bending. The coupling member 17 fixed to the flexible power transmission member 16 is connected to an end 78 of the height base member 59 and fixed by a fastening member 79.

As described above, the guide means and drive mechanism for moving the optical pickup means during reproduction of the first and second surfaces of the disk are provided on the same base member, and the optical pickup means has a height mechanism and a tilt mechanism. Since the optical pickup means is driven by a drive mechanism disposed outside the optical pickup means, the optical pickup means can be made smaller. Movement is performed by the flexible power transmission member 16
Since this is performed by an external drive mechanism via the optical pickup member 40, vibrations of the motor etc. are difficult to be directly transmitted to the optical pickup member 40.

Effects of the Invention As described above, according to the present invention, there is provided a drive motor for the pick moving means, a moving base on which the optical pickup means is mounted, and a flexible power transmission member for transmitting the driving force of the drive motor to the moving base. Consisting of
Since the drive motor is disposed outside the movable base and the driving force is transmitted from the outside to the movable base via the flexible power transmission member, the entire optical pickup means is It is possible to achieve a reduction in size and weight, and to increase the speed of movement and reversal of the optical pickup means.
Furthermore, since it is possible to prevent the vibration of the direct drive motor from being transmitted to the optical pickup means, it is possible to realize an optical disk device that always has a stable double-sided recording and reproducing function.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the main body of an optical disk device according to an embodiment of the present invention, FIG. 2 is an exploded perspective view showing the internal structure of the first base member of the device, and FIG. 3 is a perspective view of the second base member of the device. A fourth perspective view showing the inside of the base member of
The figure is a perspective view of an optical pickup means used in the optical disk device of the present invention, and FIG. 5 is an exploded perspective view showing the internal height mechanism of the optical pickup means of FIG.
FIG. 6 is an exploded perspective view showing the internal tilt mechanism of the optical pickup means in FIG. 4, and FIG. 7 is a C in FIG.
FIG. 8 is a side view of essential parts showing a schematic configuration of a conventional player that plays both sides of an optical disc. 1... Disk, 2... Optical pickup means,
3... First base member, 6... First guide means, 7... Second base member, 8... First groove, 9... First roller member, 16... Flexibility Power transmission member, 17... Connection member, 24... Drive pulley member, 33... Second guide means, 34...
Second groove portion, 35... Second roller member, 37...
...Transmission shaft, 39...Transmission arm, 40...
Optical pick-up parts.

Claims (1)

[Scope of Claims] 1. An optical pickup means for recording information on at least one of a first surface and a second surface of a disk-shaped recording medium or for reproducing information recorded thereon; The pick-up means is moved in the radial direction between the first surface and the second surface of the disk-shaped recording medium, and from the first surface side to the second surface side or from the second surface side to the first surface side. A pick moving means for moving in a U-shape, the pick moving means having a drive motor, a moving base on which the optical pickup means is placed, and a drive motor for transmitting the driving force of the drive motor to the optical moving base. and a flexible power transmission member, wherein the drive motor is disposed outside the movable base and transmits the driving force from the outside to the movable base via the flexible power transmission member. optical disk device. 2. A coupling member provided at one end of the moving base and coupled to the flexible power transmission member, and a coupling member provided inside the U-shaped moving path to transmit the driving force from the drive motor to the flexible power transmission member. and a drive pulley member for moving the drive pulley member such that the coupling member is fitted and held by the moving pulley member when the moving base means is guided along the U-shaped drive path. Claim 1: Partially provided with a notch
The optical disc device described. 3. A guide groove for guiding a support member provided at the other end of the moving base, and a transmission arm provided inside the U-shaped moving path and rotating integrally with the drive pulley member, 2. A cutout is provided in a part of the transmission arm so that the support member is fitted and held by the transmission arm when the moving base is guided along the U-shaped movement path. Item 2. The optical disk device according to item 2.