JPH01220225A - Optical information recording and reproducing device - Google Patents

Abstract

PURPOSE:To comparatively easily enable the deviation adjustment of a micro angle for an information recording and reproducing head in two directions by screwing the screw parts of screwing type of an adjustor in plural screw holes at an information recording and reproducing head part side, respectively as interposing an elastic member. CONSTITUTION:The plural screw holes (21a-21c) of left (or right)-screwing type provided on the information recording and reproducing head part 100, and the screw parts (23a-23c) to be screwed in the screw holes of the left (or light)-screwing type outside the holes are provided, and also, the adjustors (22a-22c) on which the screw holes of right (or left)-screwing type are formed are provided inside the screw parts. Also, the elastic members (25a-25c) interposed between the adjustors and the information recording and reproducing head part, and a holder screwed and fixed in the screw hole of the right (or left)-screwing type formed inside the adjustor are provided. The head part is mounted on an optical information recording and reproducing device main body via the holder, the adjustor, and the elastic member. In such a way, it is possible to perform the deviation adjustment of the micro angle for the information recording and reproducing head part by simple constitution with a few number of components in two directions.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an optical information recording/reproducing apparatus, and particularly to an improvement in the part for adjusting the orthogonality between a recording/reproducing light beam and an information recording carrier.

[Prior Art] Fig. 6 and Fig. 7 schematically show the main parts of a conventional optical information recording/reproducing device, with Fig. 6 showing its cross-sectional state and Fig. 7 showing its external shape. Indicates the status of each.

In FIG. 6fA and FIG. 7, (100) is an information recording/reproducing head unit that irradiates the light beam and detects the reflected light from the record carrier.

In FIG. 6, (1) is a light source, (2) is a collimating lens, (3) is a half mirror 1, and (4) is a light beam emitted from the light source (1). The light beam (4) passes through a collimating lens (2) and becomes a parallel beam.

(5a) and (5b) are a condenser lens and a lens driving device, which constitute a focusing and l/racking control device.

(6) is a disk which is an information recording carrier, and is rotationally driven by a rotational drive source (7).

(8) is an information bit, and the information content is expressed by the presence or absence or length of a depression.

(9) is the reflected light from the disk, (10) is a photodetector that photoelectrically converts the reflected light, (11) is the light spot irradiated onto the disk, (12) is the lens barrel, and (13) is its This is the outer wall of the lens barrel.

In FIG. 7, (14) is a holder fixed to the main body of the optical information recording/reproducing device. This holder (14
) is the direction of the X-2 plane in the figure, that is, the disk (6)
It is fixed in the direction perpendicular to the plane.

(15) is a bottle that pivotally supports the information recording/reproducing head section (100), and is pivotally mounted on the holder (14). This pin (15) pivotally supports the information recording/reproducing head section (100) so as to be rotatable within the X-Z plane.

(16) is a bolt for adjusting the amount of rotation of the information recording/reproducing head section (100). This bolt (16) has its threaded portion passing through the hole (17) of the holder (14) and is screwed into the information recording/reproducing head portion (100), and its head portion is screwed into the information recording/reproducing head portion (100). It is locked to.

(18) is a resilient Jr4 (coil spring), and with the bolt (16) passing through it, there is an intermediary between the information recording+lj raw head part (100) and the holder (14). equipped.

Next, the operation will be explained.

In Figure 6, a light beam (4) emitted from a light source (1)
The light is irradiated onto the disk (6) through the collimating lens (2), the half mirror (3), and the condensing lens (5a), forming a light spot (11) on the disk (6).

On the other hand, on the disk (6), information bits (8) representing the content of the information signal in terms of length are sequentially arranged in a concentric or spiral manner to form an information track.

The reflected light (9) from the disk (6) rotated by the rotational drive source (7) travels backward along the incident optical path and reaches the photodetector (
10), where it is converted into an electrical signal. By demodulating the output signal of the photodetector (10) according to a known description, the information recorded on the disc (6) can be reproduced into data or signals in a format convenient for use. At the same time, based on the output signal of the optical detector 5 (10), the optical spot (1
1) It is possible to extract the focal position deviation signal and the tracking signal.

In the following operation, when the disk (6) rotates, the disk (6) itself experiences vertical vibration in the direction of arrow A perpendicular to the disk (6) and vibration in the direction of arrow B parallel to the disk (6).
-Mind arises. Therefore, a focus control device (5b) is provided for vertical vibration. Also, a track control device is provided for eccentricity. The track control device drives the condensing lens (5a) in the radial direction of the disk (6) (in the direction of arrow EIJB), or drives the disk (6) together with the lens barrel (12) using a drive source using known technology.
By driving in the radial direction, a tracking operation is performed to correct deviation from the track position.

In order for the above control operations to be carried out smoothly, it is necessary that the positional relationship between the light beam (4) and the disk (6) is always maintained at exactly right angles.

Conventionally, when incorporating the information recording amphibious head section (100) into the main body of the optical information recording/reproducing apparatus, the lens barrel (12
A part of the outer wall (13) of ) was set as the mounting surface, and the installation was performed using this surface.

However, since the outer wall (13) merely forms the outside of the lens barrel (12), the outer wall (13) and the light beam (4)
), it is necessary to process and process optical parts such as the lens barrel (12) of the information recording/reproducing head section (100), the light source (1), each lens (2), (5a), etc. It was necessary to assemble it with high precision.

However, increasing precision through processing and assembly makes processing and assembly difficult and increases costs.

In order to obtain accuracy without completely relying on the accuracy of processing and assembly, the disk (6) and the information recording/reproducing head section (10
It is necessary to configure the structure so that the positional relationship with 0) can be finely adjusted. In this case, the positional relationship, that is, the degree of orthogonality between the light beam (4) and the optical disk (6), is an It is determined from two directions: the Y-2 plane, which is perpendicular to the Y-2 plane.

Here, in the conventional configuration example shown in FIGS. 6 and 7,
In the X-2 plane direction, no adjustment is made by increasing the accuracy of the parts, and in the Y-2 plane direction, a small angle bias adjustment mechanism is provided to perform fine adjustment.

The degree of orthogonality between the light beam (4) and the disk (6) in the Y-Z plane can be adjusted using bolts (16).
) is rotated in the force direction of arrow C or C'. The head of the bolt (16) is attached to the holder (14), and the information recording and reproducing head section (100) is connected to the holder (14).
(16) are screwed together with the elastic material (18) interposed, so that the bolt (16)
When rotated in the direction, the information recording/reproducing head (100) approaches the holder (14) using the pin (15) as a fulcrum, or moves away from the holder (14) as indicated by the arrow D'.
As a result, the light beam (4) is tilted in the direction of the arrow E or E''.
The degree of orthogonality between the light beam (4) and the disk (6) in the Y-2 plane can be finely adjusted.

[Problems to be Solved by the Invention] Since the conventional optical information recording and reproducing device is configured as described above, the holder (14) is provided with a through hole for the pin (15), and the pin (15) is inserted therein. It is necessary to penetrate the parts, and for this purpose, parts) 1. There was a problem that the s or 1 u was sloppy and the group q was also troublesome.

In addition, small angle deviation 1: JS adjustment can only be performed in the Y-Z plane h゛ direction, and there is no adjustment for the other X-Z plane horn direction, so it is still necessary to rely heavily on the accuracy of the parts. It was an unbelievable composition.

In the conventional (I'4 construction example shown in Fig. 6.7), even if we try to perform minute angle bias adjustment in two directions, the Y-2 plane and the X-2 plane, the number of parts and This only further increases the complexity of assembly, and does not solve the above-mentioned problem.

The present invention has been made to achieve the above-mentioned problems, and is an optical system that has a relatively simple structure and allows minute angle bias adjustment to be made from two directions for the information recording 8 reproducing head section. The objective is to obtain a formula information recording III generation device.

[Means for Solving the Problems] The optical information recording/reproducing device according to the present invention has several left (or right) threaded screw holes provided in the information recording/reproducing head section 2, and An adjuster is formed with a threaded portion to be screwed into the left (or right) screw hole, and has a right (or left) screw hole formed inside the adjuster, and this adjuster and an information recording/reproducing head. It has an elastic material interposed between the holders and a holder screwed and fixed to a right-hand (or left-hand) screw hole formed inside the adjuster, and the holder, the adjuster, and the elastic Optical information recording 11 is applied to the head section through a repellent material.
It is designed to be attached to the main body of the f-generation device.

[Function] The optical information recording/reproducing device according to the present invention inserts the left (or right) screw portion of the adjuster into a plurality of screw holes on the information recording/reproducing head side. By interposing the 8-shank and screwing it together, it is possible to perform minute angle offset adjustment for the information recording +-II raw head from two directions, and furthermore, the right (or left) screw formed on the adjuster can be adjusted from two directions. The information recording/reproducing head section can be attached using the type screw holes.

In this way, since the adjuster has both adjustment and installation functions, it is possible to easily adjust the minute angle bias to the information recording/reproducing head section with a small number of parts (14 components).
It is possible to obtain an optical information recording/reproducing device that can perform operations from any direction.

[Embodiments of the invention] Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 and FIG. 2 are schematic diagrams of main parts of an optical information recording/reproducing apparatus according to an embodiment of the present invention (1 shows the construction).

In this case, FIG. 1 is a perspective view showing the general appearance, and FIG. 2 is a sectional view from the center side taken in the direction of arrow S in FIG.

Figures 3 and 4 show optical information recording +
1 shows a state in which the 1fj recording head is attached to an optical information recording 1fj recording device, so-called a player.

In this case, FIG. 3 is a perspective view, and FIG. 4 is a plan view taken from the direction of arrow T in FIG.

FIG. 5 shows the components shown in FIG. 3 in an exploded manner.

In Figures 1 to 5, (4), (6), (12), (
14) and (100) are the same as the conventional configuration example described above.

(21a), (2l b), and (21c) are information records 11
f This is a through screw hole provided on the raw head portion (100) side. Each of the screw holes (21a), (21b), and (21c) is a left-handed screw type.

(22a), (22b), and (22c) are adjusters for adjusting minute angle deviation, and these are -fIi bolts having coaxial screw holes at their tips.

That is, each adjuster (22a), (-22b),
Each of (22c) is provided with a left-handed screw hole on the outside thereof, and right-handed screw holes (24a), (24b), and (24c) are provided on the inside thereof.

Each adjuster (22a), (22b), (22C)
Each has an elastic force 44 formed by a coil spring in its body.
' (25a), (25b), (25C) with the left-hand threaded part (23a) on the tip side, (
23b) and (23c) are the information recording/reproducing head section (10
A left-handed screw hole (21a) provided on the 0) side,
(2l b), (21c), and a part of the tip side is screwed into the screw hole (21a), (21b), (21c).
c) It passes through and protrudes. In other words, the adjusters (22a), (22b), and (22c) are screwed onto the information recording/reproducing head section (100) while resisting the elastic forces of the elastic materials (25a), (25b), and (25c), respectively. I'm forced to.

The adjusters (22a), (22b), and (22C) screwed onto the information recording/reproducing head section (100) have through holes (26a), (22C) on the holder (14) side, respectively.
6b), (26c) and the right-hand thread type fixing screw (27
a), (27b), and (27c) are screwed in.

As a result, the holder (14) is attached to the adjuster (22).
a), (22b), (22C), and fixing screws (27a), (27b), (27
C) and adjusters (22a), (22b), (22
'C) and through the elastic materials (25a), (25b), (
25c), the information recording head section (
100) side. At this time, the tips of the adjusters (22a), (22b), and (22c) are brought into contact with the information recording/reproducing head section (100) side by protruding by U and V, respectively, as shown in FIG. .

As shown in FIGS. 3 and 4, bearings (28a), (28b), and (29) are provided on the holder (14). These bearing parts (28a), (28b) and (
29) has rail rods (guide rods) (30a) and (30b).
) is passing through.

Next, the operation will be explained.

Regarding the operation inside the information recording/reproducing head section (100),
Since this is the same as the conventional example described above, the explanation will be omitted.

In FIGS. 1 to 5, when assembling, each adjuster (22a), (22b), and (22c) is inserted through the resilient material (25a), (25b), and (25c), respectively. Then, screw it into the screw holes (21a), (2lb), and (21c) on the recording/reproducing head section (100) by turning it in the directions of arrows F, G, and H.

After cono, adjuster (22a), (22b), (22
The amount of screwing in c) is set so that the protruding turn UIV in FIG. 2 is a predetermined amount. The settings at this time are the light beam (4) of the information recording/reproducing head section (100) and the disc (
6), the degree of orthogonality between Y-2 plane and X-2 plane in the figure is
This is done to the extent that it can be roughly obtained in the direction.

When attaching the information recording/reproducing head section (100) assembled with the orthogonality roughly adjusted as described above to the holder (14) of the disc recording/reproducing section of the player, fixing screws (27a) and (27b) are attached. , (27c) respectively through the through holes of the holder (14) and the adjuster (22a) screwed into the information recording/reproducing head section (100) side.
), (22b), (22c) famous screw hole (24a),
(24b) and (24c) by turning them in the directions of arrows I and J. As a result, the information recording/playback section (10
0) can be attached to the holder (14). When installing this, adjusters (22a), (22b)
, (22c) tend to rotate in the directions of arrows F, G, and H, respectively, but the resilient materials (25a), (25b), and (2
Its rotation is prevented by the action of the elastic force 5c).

The holder (14) has bearing parts (28a) and (28b).
and (29) on the rail rods (30a) and (3Ob) (f
The single motion guide allows the disc (6) to be moved in the radial direction by means of a drive source according to known technology.

After attaching the information recording/reproducing head section (100) to the holder (14), as shown in FIGS. 3 and 5, the Y-
The degree of orthogonality between the light beam (4) and the disk (6) in each direction of the X-2 plane and the X-2 plane can be finely adjusted. This adjustment can be performed as follows.

In other words, fine adjustment in the Y-2 plane direction is performed using the adjuster (2
2c) can be slightly rotated in the direction of the arrow H or H''.At this time, the light beam (4) is tilted in the direction of the arrow E or E'.Fine adjustment in the X-Z plane direction can be performed using the adjuster (22b). and (22c) respectively with arrows GG-
This can also be done by making a slight rotation in the H-H direction. At this time, the light beam (4) is tilted in one direction of arrow WW.

As described above, in the optical information recording and reproducing apparatus of the embodiment described above, the adjusters (22a), (22b), (
22c), the orthogonality between the light beam (4) and the disk (6) can be adjusted to Adjustment can be made in each direction of the two planes and the X-A plane. In addition, the adjusters (22a), (22b), and (22c) serve both adjustment and installation functions, which greatly reduces the number of parts (and simplifies the configuration). As a result, it is possible to perform minute angular bias adjustment for the information recording/reproducing head section without relying heavily on the precision of processing and assembly, and with a simple configuration with a small number of parts.
It can be done from any direction.

Note that the directions of each of the above-mentioned screws may be reversed.

[Effects of the Invention] As described above, according to the present invention, there is provided an optical information recording and recording device that records and reproduces information by irradiating a record carrier with a light beam, An information recording head unit that detects reflected light from a record carrier, a holder attached to the main body side of the optical information recording 11i production device, and a plurality of units provided in the -tx information recording 11■ production head unit. It has a threaded part that is screwed into the screw hole, and the tip of the threaded part is screwed into and passes through the screw hole, between the adjuster fixed to the holder and the information recording/reproducing head part. With the configuration including the elastic material interposed in the information recording/reproducing head, minute angle bias adjustment can be performed from two directions with respect to the information recording/reproducing head, and furthermore, the information recording/reproducing head can be attached using the adjuster. As a result, it is possible to perform minute angle bias adjustment with respect to the information recording/reproducing head section with high accuracy from two directions with a simple configuration with a small number of parts without relying heavily on the accuracy of processing and assembly. This has the effect of providing an optical information recording/reproducing device.

[Brief explanation of the drawing]

FIG. 1 shows an optical information recording +I according to an embodiment of the present invention.
j A perspective view showing a schematic t14 configuration of the main part of the production equipment, FIG. 2 is a sectional view of the center side from the direction of arrow S in FIG. 1,
FIG. 3 is a perspective view showing a schematic configuration of the optical information recording and reproducing device in which an information recording and reproducing head section is attached to the disk recording and reproducing section of the optical information recording and reproducing device, and FIG. 4 is an arrow T in FIG. 3.
FIG. 5 is an exploded perspective view showing a schematic configuration of a disk recording and reproducing section of an optical information recording and reproducing device including a head section, and FIG. 6 is a diagram of a conventional optical information recording and reproducing device's disk recording and reproducing device. FIG. 7 is a cross-sectional view schematically showing the structure of the section, and FIG. 7 is a perspective view of the information recording/reproducing head section attached to the same section. In the figure, (4) is a light beam, (6) is a disk that is a record carrier, (8) is an information pit, (9) is a reflected light, (
14) is a holder, (21a). (2l b), (21c) are left-handed screw holes, (
22a), (22b), (22c) are adjusters, (23a), (23b), (23c) are left-handed threaded parts, (25a), (2'5b),
(25c) is an elastic material, and (100) is an information recording/reproducing head section. In addition, in the figures, the same reference numerals indicate the same or equivalent parts. Agent Patent attorney Masuo Oiwa (and 2 others) +00: Includes playback head 25a, 25b, 25c: 5th grade [4 years old, 1 circle lost]
Figure 2 Head sound I3 Σ store 7 de 7 screen t) Playback sound μ shrine also horizontal 8 Figure 5 Figure 9 4F Murakami 1 side 61 stones Figure 6 Δ to Ashigo's 4/HQ recording playback - 7 which f) Association Figure 7 procedural amendment (voluntary) Indication of the case of the Commissioner of Japan Patent Office Patent application 1986 63- 046715 Title of the invention Optical information recording/reproducing device 3, person making the correction Representative Moriya Shiki■/He/'. 5. A column for the detailed description of the invention and the brief description of the drawings in the specification to be amended. 6. Contents of amendment

Claims (1)

[Claims] (1) An optical information recording and reproducing device that records and reproduces information by irradiating a record carrier with a light beam, the information recording and reproducing head section detecting the irradiation of the light beam and the reflected light from the record carrier. and a holder to be attached to the main body side of the optical information recording and reproducing device, and a threaded portion that is screwed into a plurality of screw holes provided in the information recording and reproducing head portion, and the tip of the threaded portion is connected to the aforementioned information recording and reproducing head. An optical information recording/reproducing device comprising: an adjuster fixed to the holder by screwing into and passing through a screw hole; and an elastic material interposed between the adjuster and the information recording/reproducing head.