JP2989959B2 - Optical information recording / reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical information recording / reproducing apparatus for recording or reproducing information using an optical disk.

[0002]

2. Description of the Related Art FIGS. 12 and 13 are perspective views of a main part showing a pickup reversing mechanism of a conventional optical disk reproducing apparatus.
FIG. 12 is disclosed in Japanese Patent Application Laid-Open No. 62-287476. In FIG. 12, 1 is a disk on a disk on which information can be recorded on both sides, and 2 is a spindle motor for rotating the disk 1 and a base 4.
It is fixed to. Reference numeral 3 denotes a center of the disk 1, a turntable for holding the disk 1, and 10 a pickup 11
As shown in the figure, pinions 14 and 17 that engage with U-shaped left and right racks 22 and 23 fixed to the base 4 are attached to the side surface of the carriage as shown in the figure. 24 and 25 are the discs 1 of the carriage 10, respectively.
A first guide shaft and a second guide shaft that guide the movement of the first member in the radial direction (PQ direction). In FIG. 13, reference numerals 20 and 21 denote a first rack and a second rack that mesh with the pinion 14. Reference numeral 61 denotes a reversing pinion for transmitting a driving force for reversing the carriage 10, and 60 denotes a reversing rack on an annular shape formed on its inner periphery with teeth meshing with the reversing pinion 61. Fixed. Reference numeral 63 denotes a rotation axis when the carriage 10 is inverted.

FIG. 14 shows a top view and FIG. 15 shows a side view of the carriage 10 in detail. 13 is the carriage 10
Is a slide motor that generates a driving force for moving the disk 1 in the radial direction (PQ direction), and transmits the propulsive force to the pinion 14 while reducing the speed via the gears 15 and 16. As shown in FIG. 14, the carriage 10 can rotate the pickup 11 in the pickup tilt angle adjustment direction (IJ direction) shown in FIG. 15 via rotation shafts 11b and 11c attached to both ends of the pickup 11. Hold. A motor 52 generates a driving force for adjusting the tilt angle.
The driving force is transmitted to the two-stage gear 54 rotatably supported by the shaft 56 via the third gear 3. The two-stage gear 54 includes a spur gear portion 54a that meshes with the worm gear 53 and a worm gear portion 54b. An adjusting screw 55 meshes with the worm gear portion 54b, and the U-shaped concave portion 55a of the pickup 11 The attached lever 11a is engaged.

Next, the operation will be described. When recording information on the normal disk 1 or reproducing information from the disk 1, the carriage 10 supported by the guide shaft 24 is moved in the radial direction (PQ direction) of the disk 1 as shown in FIG. While irradiating the beam to the disc 1 from the pickup 11. At this time, focusing (KL) is performed by a focus adjustment mechanism (not shown) incorporated in the pickup 11 so that the beam is focused on the surface of the disk 1.
Direction). Further, even when the disk 1 warps and warps, the beam irradiation direction (M direction) is changed to the disk 1.
The pickup 11 is tilted in the IJ direction while always electrically monitoring the tilt angle so as to be always perpendicular to the surface of the lens.

At this time, the movement of the carriage 10 in the radial direction (PQ direction) of the disk 1 moves the pinion 14 attached to the carriage 10 and engaged with the rack described above.
This is performed by driving with the slide motor 13 and supporting the carriage 10 with the first guide shaft 24 or the second guide shaft 25. The tilt angle of the pickup 11 is adjusted by moving the adjusting screw 55 in the KL direction shown in FIG. 15 by driving the motor 52 and displacing the pickup lever 11a engaged with the adjusting screw 55 in the KL direction. The adjustment is performed by rotating in the IJ direction around the rotation shafts 11b and 11c.

When recording or reproduction is performed on both surfaces of the disk 1 using one pickup without taking out the disk 1 and turning over, the beam of the pickup 11 held on the carriage 10 can irradiate both surfaces of the disk 1. Thus, the carriage 10 needs to be reversed. FIG. 17 is a diagram showing the reverse movement of the carriage 10 in the conventional example shown in FIG. When performing the reversing movement, the carriage 10 is moved in a radially outer direction (Q direction) of the disk 1. The carriage 10 is the disk 1
The first guide shaft 24 or the second guide shaft 25 is disengaged near the outer periphery of the U-shaped rack, but at the same time, the guide groove 23a provided on the side surface of the U-shaped rack and the pinion 17 are fitted, so that the carriage 10 From the straight portion of the rack to the U-shaped portion of the rack. Then, the propulsion force is obtained by the engagement between the pinion 17 and the rack, and the pinion 17 reversely moves in the RS direction.

FIGS. 18 and 19 are diagrams showing the reversing movement of the carriage in the conventional example shown in FIG.
When performing the reversing movement, the carriage 10 is moved in a radially outer direction (Q direction) of the disk 1. Carriage 10
Is disengaged from the first guide shaft 24 or the second guide shaft 25 near the outer peripheral portion of the disk 1 and moves to the gondola 62 which is rotatably supported in the TU direction by the rotating shaft 63. I do. At the position where the movement to the gondola 62 is completed, the carriage 10 is in the third position fixed to the gondola 62.
And a reversing pinion 61 held by the carriage 10 and transmitted with driving force from the slide motor 13 meshes with a reversing rack 60 fixed to the base 4, and the gondola 62 rotates in the T direction. I do. Gondola 62
Stops at a position rotated by 180 degrees in the TU direction as shown in FIG. 19, at which position the pinion 14 engages with the second rack 21 and the carriage 10 is oriented radially inward of the disk 1 (P direction). ) To complete the reverse movement.

[0008]

In the conventional optical information recording / reproducing apparatus configured as described above, the mechanism for adjusting the tilt of the beam applied to the disk is provided inside the carriage that moves while holding the pickup. However, since the size of the carriage itself is increased and the weight is increased, there is a problem in that the following characteristics of the carriage are deteriorated when information is recorded / reproduced on a disk at high speed. Also, as the dimensions of the carriage increase,
There has been a problem that the dimensions of the entire apparatus also become large. Furthermore, since the guide shaft that guides the movement of the carriage in the disk radial direction is fixed to the base, the distance between the pickup held by the carriage and the disk is always short, and the disk is placed on the turntable. When changing or setting a large distorted disc on the turntable, the disc and the pickup approach, and in the worst case, both may come into contact and both the disc and the pickup may be damaged. There was a problem. In addition, in the conventional example shown in FIG. 12, since the rack is connected in a U-shape to the recording / reproducing position on the front and back surfaces of the disk, it becomes difficult to assemble the carriage into the rack. There is also a problem that maintenance is lacking even in repairs and the like.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has reduced the number of driving mechanisms housed in a pickup carriage, and has realized a small, highly reliable, and easy-to-assemble assembling apparatus capable of high-speed access. An object is to obtain a good optical information recording / reproducing device.

[0010]

SUMMARY OF THE INVENTION An optical information recording / reproducing apparatus according to the present invention records information on a disk or reads information from a disk.
Pickup for reproducing information, and the pickup
Holding it and moving it in the radial direction of the disc.
The pickup moving mechanism and the pickup moving mechanism
A first guide shaft and a first rack that are supported so as to be movable in a line.
And guide it in a radial direction on the surface of the disk.
The first guide mechanism and the pickup moving mechanism
Including a second guide shaft movably supported and a second rack
And guide it in the radial direction on the back side of the disk.
A second guide mechanism and the disk, substantially parallel to the disk plane;
Rotate around an axis in a direction perpendicular to the disk radial direction,
The pickup moving mechanism is inverted between the two guide mechanisms.
A pickup reversing mechanism for moving
The pickup is rotated by rotating the respective mechanisms.
Angle adjustment for adjusting the inclination angle with respect to the disk
The drive of the mechanism is shared with the drive source of the pickup reversing mechanism.
It is characterized in that it is configured to be used.

[0011] Further , information is recorded or recorded on a disc.
A pickup for reproducing information from a disc,
And move it in the radial direction of the disc.
Pickup moving mechanism and pickup moving machine
A first guide shaft for supporting the structure so as to be able to move linearly and a first rail;
And move it radially on the surface of the disc.
A first guide mechanism for guiding, and the pickup moving mechanism
A second guide shaft and a second rack for supporting the
And move it radially on the back side of the disc.
A second guide mechanism, which is substantially parallel to the disk plane,
The disk rotates about an axis perpendicular to the radial direction of the disk.
Moving the pickup moving mechanism between the two guide mechanisms.
And a pickup reversing mechanism for reversing movement at the
A pickup moving mechanism configured to move the first guide mechanism and the pin;
Between the backup reversing mechanism or the second guide mechanism
When moving between the pickup reversing mechanism and
A third rack provided in the pickup reversing mechanism and the third rack;
The first rack or the second rack is engaged,
The pinion provided in the pickup moving mechanism is
The third rack provided in the pickup reversing mechanism and the third rack
Installed on the first rack or the pickup reversing mechanism
The third rack and the two engaged racks of the second rack
The feature is that it is configured to engage with the rack continuously.
I do.

In addition, information is recorded or recorded on a disc.
A pickup for reproducing information from a disc,
And move it in the radial direction of the disc.
Pickup moving mechanism and pickup moving machine
A first guide shaft for supporting the structure so as to be able to move linearly and a first rail;
And move it radially on the surface of the disc.
A first guide mechanism for guiding, and the pickup moving mechanism
A second guide shaft and a second rack for supporting the
And move it radially on the back side of the disc.
A second guide mechanism, which is substantially parallel to the disk plane,
The disk rotates about an axis perpendicular to the radial direction of the disk.
Moving the pickup moving mechanism between the two guide mechanisms.
And a pickup reversing mechanism for reversing movement at the
A pickup moving mechanism configured to move the first guide mechanism and the pin;
Between the backup reversing mechanism or the second guide mechanism
And when moving between the pickup reversing mechanism,
A first guide mechanism or the second guide mechanism and the D
The distance from the disk to the disk is
The first guide mechanism or the front
Note that the second guide mechanism is configured to be inclined.
Sign.

Further , information is recorded or recorded on a disc.
A pickup for reproducing information from a disc,
And move it in the radial direction of the disc.
Pickup moving mechanism and pickup moving machine
A first guide shaft for supporting the structure so as to be able to move linearly and a first rail;
And move it radially on the surface of the disc.
A first guide mechanism for guiding, and the pickup moving mechanism
A second guide shaft and a second rack for supporting the
And move it radially on the back side of the disc.
A second guide mechanism, which is substantially parallel to the disk plane,
The disk rotates about an axis perpendicular to the radial direction of the disk.
Moving the pickup moving mechanism between the two guide mechanisms.
And a pickup reversing mechanism for reversing movement at the
A pickup reversing mechanism incorporates the pickup moving mechanism.
Between the first guide mechanism and the second guide mechanism
When moving the, the pickup reverse mechanism provided in the
The pickup is moved by the third guide shaft and the third rack.
Locking the moving mechanism in the pickup reversing mechanism.
Features.

[0014]

[0015]

[0016]

In the optical information recording / reproducing apparatus configured as described above, the tilt angle of the pickup with respect to the disk is adjusted by rotating the pickup guide mechanism, and the tilt angle is adjusted using the drive source of the pickup reversing mechanism. Since the mechanism is configured to be driven, the number of drive mechanisms housed in the pickup carriage is reduced, thereby reducing the size and weight of the pickup carriage and enabling high-speed access. In addition, since the guide shaft that guides the movement of the carriage in the radial direction of the disk is movable with respect to the base, when changing the disk to the turntable, or when a large distorted disk is set on the turntable, etc. Thus, it is possible to prevent the disc and the pickup from approaching each other, thereby preventing the disc and the pickup from being damaged due to the contact between them. Further, since the pickup guide mechanism and the pickup reversing mechanism are configured separately, it is possible to easily attach and detach the pickup moving mechanism to and from the pickup guide mechanism.

[0017]

【Example】

Embodiment 1 FIG. FIG. 1 is a perspective view showing an optical information recording / reproducing apparatus according to one embodiment of the present invention, FIG. 2 is a side view of a tilt adjusting mechanism and a reversing mechanism showing main parts of the present invention, and FIG. 3 is a top view of FIG. It is. In the figure, the same or corresponding parts as those of the conventional optical information recording / reproducing apparatus are denoted by the same reference numerals, but are not described because they have already been described. Reference numeral 6 denotes a pickup moving mechanism, which is a pickup 11, not shown here, but a slide motor 13 for transmitting its driving force to a pinion 14 as in the conventional example, and is rotatably supported on the side facing the pinion 14. The carriage 10 includes a guide roller 12 and a carriage 10 that holds the guide roller 12. The carriage 10 is provided with a bearing 10a that fits with a guide shaft.
Similarly to the conventional example, the radial direction (P
These are configured to be movable in the Q direction).
Reference numeral 7 denotes a first guide mechanism, a first rack 20 meshing with the pinion 14, a first guide shaft 24 for guiding the radial movement of the disk 1 of the carriage 10, and a guide roller 12 running on the upper surface thereof. It is composed of a roller base 28 and a first slide base 26 which fixedly holds them and has both ends thereof bent at right angles in the vertical direction as shown in the figure. Reference numeral 8 denotes a second guide mechanism, similar to the first guide mechanism 7, on the bottom surface of the second slide base 27.
Rack 21 and the second guide shaft 25 are held.
Reference numeral 9 denotes a pickup reversing mechanism, as shown in the figure, a gondola 40 having both ends bent at right angles in the vertical direction, a third guide shaft 41 held by the gondola 40, and a third rack 4
2. It is composed of a gondola roller stand 43.

A gondola turning shaft 44 is fixed to the side surface of the gondola 40 so as to penetrate therethrough. The gondola turning shaft 44 is rotatably supported by the bases 4a and 4b. Further, the cam gear 31 is fixed to the gondola rotating shaft 44, and a rotational driving force is transmitted from a reversing motor 50 screwed to the base 4a via a worm gear 51. It has a structure that rotates integrally.
Reference numeral 30 denotes an inclination adjusting mechanism.
1a, 301b, and are supported by support pins 305, 306 fixed to the base 4a so as to be movable only in the vertical direction (AB direction). Also, one end 3 of the lever 301
A pin 304 is implanted in 01c as shown in the figure, and this pin 304 is engaged with a cam groove 31a provided in the cam gear 31. Further, a pin 302 and a pin 303 are erected on the other end 301d and 301e of the lever 301, and these pins are respectively elongated holes 26a and second slide bases 27 provided on the side surface 26b of the first slide base 26. Is engaged with a long hole 27a provided in the side surface 27b of the second member. As shown in FIGS. 1 and 3, rotating pins 261 and 262 are coaxially attached to the side surfaces 26b and 26c of the first slide base 26, and these are turned around the bases 4a and 4b. It is movably supported. Similarly, the rotation pins 271 and 272 are coaxially attached to the side surfaces 27b and 27c of the second slide base 27, and these are also rotatably supported by the bases 4a and 4b.

Next, the operation will be described. In the optical information recording / reproducing apparatus configured as described above, when the reversing motor 50 is driven, the driving force is transmitted to the cam gear 31 via the worm gear 51. Therefore, the gondola 40 fixed to the gondola rotation shaft 44 rotates in the gondola rotation direction (CD direction) in synchronization with the rotation of the cam gear 31. At the same time, the lever 301 is engaged with the pin 304 engaged with the cam groove 31a of the cam gear 31 and the elongated hole 301.
a, AB with support pins 305, 306 engaging with 301b.
Because it is restricted so that it can move only in the direction, it moves in parallel in the vertical direction (AB direction) according to the shape of the cam groove 31a. As a result, the first slide base 26 and the second slide base 27 engaged with the pins 302 and 303 via the elongated holes 26a and 27a, respectively, are connected to the rotation pins 261 and 262 or the rotation pin 271. , 272 as a rotation axis in the GH direction and the EF direction, respectively.

In the above configuration, the gondola 40 and the first and second slide bases 2 are rotated with respect to the rotation of the cam gear 31.
6 and 27 operate synchronously, but the operation is arbitrarily determined by the shape of the cam groove 31 a formed in the cam gear 31. 4 to 6 show the cam gear 31 in the present embodiment,
The operations of the gondola 40, the first slide base 26, the second slide base 27, and the lever 301 are shown. FIG. 5 shows a state in which the pickup moving mechanism 6 can move between the gondola 40 and the first guide mechanism 7, and FIG. 6 shows a state in which the pickup moves between the gondola 40 and the second guide mechanism 8. This shows a state in which the mechanism 6 can move over. The gondola 40 rotates around the gondola rotation shaft 44 in the CD direction with the positions shown in FIGS. FIG. 4 shows the neutral position of the rotation of the gondola 40. In this state, the first slide base 26 and the second slide base 27 are kept substantially horizontal, and the pickup movement supported by them is moved. The direction (M direction) of the beam emitted from the mechanism 6 is also set to be substantially vertical. That is, when the gondola 40 rotates in the direction (D direction) approaching the first slide base 26 from the state shown in FIG. 4, the slide bases 26 and 27 move the pins 302 and 303 to B as shown in FIG. When the gondola 40 rotates in a direction (direction C) approaching the second slide base 27 from the state of FIG. 4, the slide bases 26 and 27 are pinned as shown in FIG. 6. 302 and 303 are tilted in the direction of rising in the A direction.

FIG. 7 and FIG. 8 are side and top views of the main part in a state where the pickup moving mechanism 6 can move between the gondola 40 and the first guide mechanism 7 shown in FIG. It is shown. The first rack 20 and the third rack 42 have, at opposite ends thereof, notched portions 2 having a slope so as to engage with each other when the vehicle can be transferred.
0a and 42a are formed, and both are configured to function as one linear rack when engaged. Similarly, the roller stand 28 is engaged so that the upper surface height of the gondola roller stand 43 and the upper surface height of the roller stand 28 are the same. Further, by arranging the first guide shaft 24 and the third guide shaft 41 so as to be substantially coaxial, the carriage 10 fitted with the first guide shaft 24 can be replaced with the first guide shaft 24. The pickup moving mechanism 6 can move between the gondola 40 and the first guide mechanism 7 while maintaining a predetermined position by releasing the fitting with the third guide shaft 41. Becomes Although not shown, the transfer movement of the pickup moving mechanism 6 between the gondola 40 and the second guide mechanism 8 is achieved by the same operation as described above.

The disk 1 is used by using the apparatus shown in this embodiment.
When recording or reproducing information on the disk 1, the slide motor 13 mounted on the carriage 10 is driven, and the pinion 14 and the racks 20 and 21 are engaged with each other in the radial direction (as in the conventional example). The carriage 10 is transported in the PQ direction). The tilt angle of the beam irradiating the disk 1 is adjusted by driving the reversing motor 50 while constantly monitoring the tilt angle, thereby rotating the cam gear 31 and driving the lever 301 engaged with the cam gear 31 to thereby move the pickup moving mechanism. 6 that supports the disk 6 slidably in the radial direction of the disk 1.
The second guide mechanism 8 or the second guide mechanism 8 is rotated around the respective rotation axes to adjust them. When recording or reproduction on one side of the disc 1 is completed and recording or reproduction on the other side is performed, the gondola 40 is reversed to the guide mechanism on the side where the pickup moving mechanism 6 is located.

FIGS. 9 and 10 are views showing the reverse movement from the first guide mechanism 7 to the second guide mechanism 8. In FIG. 9, the transfer of the pickup moving mechanism 6 to the gondola 40 is shown. It shows the completion. FIG. 10 shows that the gondola 40 has turned in the gondola turning direction (C direction) from the state of FIG. During the reversing movement, the pinion 14 held by the pickup moving mechanism 6
Keeps the state engaged with the third rack 42, and the carriage 10 is fitted with the third guide shaft 41. Therefore, if the slide motor 13 transmitting the driving force to the pinion 14 is stopped, the pickup moving mechanism 6 is locked to the gondola 40 without holding any other locking mechanism. Subsequently, the gondola 40 pivots to the transfer position shown in FIG. 6, stops the rotation of the gondola 40, and then drives the slide motor 13 again to move the pinion 14 from the third rack 42 to the second rack. By moving the pickup moving mechanism 21, the pickup moving mechanism 6 is moved to and moved to the second guide mechanism 8, and recording or reproduction on this surface is started.

As can be understood from the above operation, when the pickup moving mechanism 6 reversely moves, the guide mechanism 7,
Numeral 8 always tilts so that the side where the pickup moving mechanism is located is retracted from the disk. This makes it possible to keep the distance between the pickup 11 and the disk 1 large when the pickup 11 does not need to approach the disk 1 other than during recording or reproduction. It is possible to prevent both of them from being damaged due to collision with the pickup 11.

When the pickup moving mechanism 6 is to be incorporated into the guide mechanism or to be removed for repair or the like, the gondola 40 is set to the neutral state shown in FIG.
The work can be easily carried out by inserting and removing the pickup moving mechanism 6 from the outer peripheral side of the disk.

Embodiment 2 FIG. In the first embodiment, the lever 30
In the first drive, the cam groove 31a is formed in the cam gear 31 and this is performed. However, another embodiment may be configured as shown in FIG. In FIG. 11, reference numeral 32 denotes a two-stage gear;
One stage of the gear meshes with the worm gear 51, and the other stage meshes with the gear 33. The gear 33 is supported by a pivot pin 331, which is fixed to the base 4a, not shown. A pin 332 is erected at a position facing the gear portion of the gear 33, and is engaged with an elongated hole 307 provided in the lever 301. In the above configuration, when the reversing motor 50 is driven, the worm gear 51
The two-stage gear 32 and the gear 33 are driven via the
Since the lever 301 that engages with the pin 332 implanted through the long hole 307 moves in the vertical direction (AB direction), the same effect as that described above is exhibited.

[0027]

Since the present invention is configured as described above, the following effects can be obtained.

A pickup moving mechanism for holding and moving the pickup, a first guide mechanism for moving and moving the pickup moving mechanism in the radial direction on the front surface of the disk, and moving the pickup moving mechanism in a radial direction on the back surface of the disk. A second guide mechanism for guiding and a pickup reversing mechanism for reversing the pickup moving mechanism between the two guide mechanisms are provided, and the tilt angle of the pickup with respect to the disk is adjusted by rotating the two guide mechanisms respectively. Since the tilt adjustment mechanism is driven using the drive source of the pickup reversing mechanism, the number of drive mechanisms housed in the pickup carriage is reduced, high-speed access is possible, and the size of the apparatus can be reduced. It is planned.

Also, only when the pickup moving mechanism moves between the first guide mechanism and the pickup reversing mechanism or between the second guide mechanism and the pickup reversing mechanism,
The third rack provided on the pickup reversing mechanism is engaged with the first rack or the second rack, and the pinion provided on the pickup moving mechanism is connected to the third rack provided on the pickup reversing mechanism and the first rack. And the third rack provided in the pickup reversing mechanism and the two racks engaged with the second rack are continuously engaged with each other. In other cases, the engagement is released and the guide is released. The pickup moving mechanism can be easily incorporated into and removed from the mechanism, and an apparatus with excellent assembling and maintenance properties can be obtained.

[0030]

When the pickup moving mechanism moves between the first guide mechanism and the pickup reversing mechanism or between the second guide mechanism and the pickup reversing mechanism, the first guiding mechanism or the second guiding mechanism is used. Since the first guide mechanism or the second guide mechanism is inclined so that the distance between the mechanism and the disk is larger on the outer circumferential side than on the inner circumferential side in the radial direction of the disk, the distance between the first guide mechanism and the second guide mechanism is different from that during recording / reproduction. When the pickup does not need to approach the disk, it is possible to keep the distance between the pickup and the disk large, and to prevent damage to both of the disk and the collision due to collision between the disk and the pickup. A device can be obtained.

Further, when the pickup reversing mechanism moves between the first guide mechanism and the second guide mechanism, the pickup moving mechanism is controlled by the third guide shaft and the third rack provided in the pickup reversing mechanism. Since the device is configured to be locked in the pickup reversing mechanism, the device can be configured at low cost without requiring another locking mechanism.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating an optical information recording / reproducing apparatus according to a first embodiment of the present invention.

FIG. 2 is a side view of a tilt angle adjusting mechanism and a reversing mechanism showing a main part of the first embodiment of the present invention.

FIG. 3 is a top view illustrating the optical information recording / reproducing apparatus according to the first embodiment of the present invention.

FIG. 4 is a main part side view showing an operation of a tilt angle adjusting mechanism and a reversing mechanism according to the first embodiment of the present invention.

FIG. 5 is a main part side view showing the operation of the inclination adjusting mechanism and the reversing mechanism according to the first embodiment of the present invention.

FIG. 6 is a main part side view showing the operation of the tilt angle adjusting mechanism and the reversing mechanism according to the first embodiment of the present invention.

FIG. 7 shows the details of the operation in FIG. 5 according to the first embodiment of the present invention.
FIG. 3 is a side view of the optical information recording / reproducing device in FIG.

FIG. 8 shows the details of the operation of FIG. 5 according to the first embodiment of the present invention.
FIG. 2 is a top view of the optical information recording / reproducing device in FIG.

FIG. 9 is a main part side view showing the reversing movement of the first embodiment of the present invention.

FIG. 10 is a main part side view showing the reversing movement of the first embodiment of the present invention.

FIG. 11 is a side view of a tilt adjustment mechanism and a reversing mechanism showing main parts of a second embodiment of the present invention.

FIG. 12 is a perspective view of a main part of a pickup reversing mechanism of the optical disc reproducing apparatus of the first conventional example.

FIG. 13 is a perspective view of a main part of a pickup reversing mechanism of the optical disk reproducing device of Conventional Example 2.

FIG. 14 is a top view of a carriage of the optical disc reproducing apparatus of the first conventional example.

FIG. 15 is a side view of a carriage of the optical disc reproducing apparatus of the first conventional example.

[16] conventional optical information recording reproduction pickup,
FIG. 5 is a side view of a main part showing an operation of the carriage.

FIG. 17 is a side view showing a reversing movement operation of Conventional Example 1.

FIG. 18 is a side view showing a reversing movement operation of Conventional Example 2.

FIG. 19 is a side view showing a reversing movement operation of Conventional Example 2.

[Explanation of symbols]

 Reference Signs List 1 disc 6 pickup moving mechanism 7 first guide mechanism 8 second guide mechanism 9 pickup reversal mechanism 11 pickup 14 pinion 20 first rack 21 second rack 24 first guide shaft 25 second guide shaft 30 tilt angle Adjusting mechanism 41 Third guide shaft 42 Third rack 50 Reverse motor

Claims (4)

(57) [Claims] And 1. A pickup for reproducing information from a recording or disk information to disk, to hold the pickup, a pickup moving mechanism for moving it in a radial direction of the disk, the pickup moving mechanism
Includes a first guide shaft and the first rack, the first guide mechanism for moving guiding it in the radial direction of the surface of the disk, the pickup moving mechanism straight to linearly movably supported
A second guide shaft and a second rack for supporting the disk so as to be movable in a line, and a second guide mechanism for guiding the second rack in a radial direction on the back surface of the disk; rotates about the axis perpendicular to, and a pickup reversing mechanism for reversing the movement between the pickup moving mechanism of the both guide mechanism, the two
By rotating the guide mechanisms,
Tilt angle for adjusting the tilt angle of the tip with respect to the disk
The drive of the adjustment mechanism is performed by the drive source of the pickup inversion mechanism.
An optical information recording / reproducing apparatus characterized in that it is configured to be shared with the optical information recording / reproducing apparatus. 2. Recording information on a disc or disc
A pickup for reproducing more information, and the pickup
And move it in the radial direction of the disk.
A pickup moving mechanism, and the pickup moving mechanism
A first guide shaft and a first rack that are supported so as to be movable linearly.
And guiding the disk in the radial direction on the surface of the disk.
The first guide mechanism that performs
The second guide shaft and the second rack that support the line
And guide it in the radial direction on the back side of the disc.
A second guide mechanism, which is substantially parallel to the disk plane,
Rotates around an axis perpendicular to the disc radial direction
And the pickup moving mechanism is moved between the two guide mechanisms.
A pickup reversing mechanism for reversing movement;
A pickup moving mechanism, the first guide mechanism and the pick-up mechanism.
Between the backup inversion mechanism or the second guide mechanism.
When moving between the pickup reversing mechanism,
A third rack provided in the pickup reversing mechanism and the first rack;
Of the second rack or the second rack,
The pinion provided in the pickup moving mechanism is
The third rack provided in the
1 rack or provided on the pickup reversing mechanism
The two racks engaged by the third rack and the second rack
Characterized by being continuously engaged with the
Optical information recording and reproducing device. 3. Recording information on a disc or disc
A pickup for reproducing more information, and the pickup
And move it in the radial direction of the disk.
A pickup moving mechanism, and the pickup moving mechanism
A first guide shaft and a first rack that are supported so as to be movable linearly.
And guiding the disk in the radial direction on the surface of the disk.
The first guide mechanism that performs
The second guide shaft and the second rack that support the line
And guide it in the radial direction on the back side of the disc.
A second guide mechanism, which is substantially parallel to the disk plane,
Rotates around an axis perpendicular to the disc radial direction
And the pickup moving mechanism is moved between the two guide mechanisms.
A pickup reversing mechanism for reversing movement;
A pickup moving mechanism, the first guide mechanism and the pick-up mechanism.
Between the backup inversion mechanism or the second guide mechanism.
When moving between the pickup reversing mechanisms, the
The first guide mechanism or the second guide mechanism and the disc
The distance from the disc to the outer circumference in the disc radial direction is
The first guide mechanism or the
The second guide mechanism is configured to be inclined.
Optical information recording and reproducing apparatus. 4. Recording information on a disc or disc
A pickup for reproducing more information, and the pickup
And move it in the radial direction of the disk.
A pickup moving mechanism, and the pickup moving mechanism
A first guide shaft and a first rack that are supported so as to be movable linearly.
And guiding the disk in the radial direction on the surface of the disk.
The first guide mechanism that performs
The second guide shaft and the second rack that support the line
And guide it in the radial direction on the back side of the disc.
A second guide mechanism, which is substantially parallel to the disk plane,
Rotates around an axis perpendicular to the disc radial direction
And the pickup moving mechanism is moved between the two guide mechanisms.
A pickup reversing mechanism for reversing movement;
A pickup reversing mechanism is equipped with the pickup moving mechanism
Then, between the first guide mechanism and the second guide mechanism
At the time of moving, a third
The pickup is moved by the guide shaft and the third rack.
It is characterized in that the mechanism is locked in the pickup reversing mechanism.
Optical information recording / reproducing device.