JPH03119552A - Optical recording and reproducing device - Google Patents

Abstract

PURPOSE:To prevent an information recording surface from being deteriorated by forming a groove part whose width is narrower than that of an optical recording medium along the traveling direction of the optical recording medium and optically record or reproduce information on a part opposed to the groove part. CONSTITUTION:The groove part 24 whose width is narrower than that of the optical recording medium 7 is provided along the traveling direction of the medium 7 on the rubbing part of the medium 7 on a fixed drum 15 around which the medium 7 is wound. Hereupon, the medium 7 is an optical tape. The information is optically recorded or reproduced on the part opposed to the groove part 24 of the medium 7. Then, the information recording area 7C of the medium 7 does not come in contact with the drum 15 and the area 7C is prevented from being deteriorated by frictional flaw. Thus, the information is surely recorded or reproduced in spite of repeated recording and reproducing.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Industrial Application Field The present invention relates to an optical recording/reproducing device, and is applicable to an optical recording/reproducing device that records or reproduces optical information on a tape-shaped optical recording medium, for example. It is suitable for this purpose.

B. Summary of the Invention The present invention provides an optical recording/reproducing device in which an optical recording medium is slidably contacted with a groove provided in the surface portion of the guide along the running direction of the optical recording medium. It is possible to prevent friction scratches from occurring on the information recording surface.

C. PRIOR TECHNOLOGY Conventionally, in this type of optical recording/reproducing apparatus, as shown in FIG. 4, a tape-shaped optical recording medium (hereinafter referred to as optical tape) 7 is wound helically. By rotating the rotating disk while running the optical tape 7, the light beam from the optical head is directed to the upper drum. It is considered that the light is ejected onto the optical tape 7 through a gap 8 formed between the lower drum 4A and the lower drum 4B, thereby optically recording and reproducing desired information.

In this case, the scanning locus of the light beam emitted from the optical head can be sequentially formed obliquely with respect to the running direction of the optical tape 7 wound helically, and thereby optical information (hereinafter referred to as It is designed to be able to record and reproduce optical information (referred to as optical information).

D Problems to be Solved by the Invention Incidentally, in this type of optical recording and reproducing apparatus, optical information is recorded or reproduced on the surface of an optical tape using a light beam, so that the optical information on the optical tape is Optical information can be recorded or reproduced without bringing the optical head into contact with the recording surface, which prevents scratches from forming on the information recording surface of the optical tape due to friction even when recording and reproduction are performed many times. It has the advantage of not causing any deterioration such as corrosion.

However, when the optical tape 7 is wound around the fixed drum 4 and run, the optical head is not in contact with the optical tape (but the information recording surface of the optical tape 7 is in contact with the fixed drum 4 while running). As a result, there are problems in that the inherent advantages of optical recording and reproducing cannot be fully utilized in practice, such as the fact that friction scratches adhere to the information recording surface, making it difficult to reliably record or reproduce optical information.

The present invention has been made in consideration of the above points, and it is an object of the present invention to propose an optical recording/reproducing apparatus which is free from deterioration due to the adhesion of friction scratches on the information recording surface of an optical tape.

E Means for Solving the Problem In order to solve this problem, in the present invention, the optical recording medium 7 is wound helically around the guide 15 and the optical recording medium 7 is run at a predetermined speed. In an optical recording and reproducing device 10 that is configured to optically record or reproduce desired information from an optical head 13 or 14 on an optical recording medium 7, an optical recording medium is attached to a portion of the guide 15 that comes into sliding contact with the optical recording medium 7. A groove 24 having a width narrower than the width of the optical recording medium 7 is formed along the running direction of the medium 7, and information is optically recorded or reproduced in a portion 7C of the optical recording medium 7 facing the groove 24.

In the guide 15 around which the F-action optical recording medium 7 is wound, a guide is formed in the sliding contact portion of the optical recording medium 7 to have a width narrower than the width of the optical recording medium 7 along the running direction of the optical recording medium 7. By providing the groove portion 24 and preventing the information recording area 7C of the optical recording medium 7 from coming into contact with the guide 15,
It is possible to prevent friction scratches from occurring in the information recording area 7C due to sliding contact.

Therefore, even when recording or reproducing is performed repeatedly, the information recording area 7C of the optical recording medium 7 can be prevented from deteriorating.

G example An embodiment of the present invention will be described in detail below with reference to the drawings.

In FIG. 1, reference numeral 10 indicates an optical recording/reproducing device as a whole, and optical heads 13 and 14 are arranged at an angular interval of 180 degrees on a rotating disk 11 that is configured to rotate in the direction of arrow a. The light beams LAI and LA2 emitted from the laser light source provided at the second
As shown in the figure, the liquid is injected through a gap 16 formed between an upper drum 15A and a lower drum 15B.

As a result, the light beams LAI and LA2 are transferred to the upper drum 15.
The light is focused on the recording surface of the optical tape 7 wound around the fixed drum 15 formed by fastening A and the lower drum 15B with the fastening member 17. A spot SP is formed.

On the other hand, the optical tape 7 is wound around the fixed drum 15 in an Ω shape at a winding angle of 180 degrees via the guide post 20 (Fig. Shape 6: It is wound helically along the portion 22 (FIG. 2).

Therefore, by rotating the rotating disk 11 at a predetermined rotation speed and running the optical tape 7 at a predetermined speed,
The light beams LAI and LA2 sequentially and alternately scan the optical tape 7 at a period in which the rotating disk 11 rotates 180 degrees.

As a result, on the optical tape 7, recording tracks that are oblique to the running direction of the optical tape 7 are sequentially and alternately formed, and by modulating the light beams LAI and LA2 with the information signal, the desired recording tracks are formed. Optical information can be recorded sequentially.

On the other hand, during reproduction, the light beams LA1 and LA, 2 are irradiated, and the returned light beam obtained from the optical tape 7 is redirected back to the optical path of the light beams LAI and LA2. It leads to photodetectors provided at 13 and 14.

In this way, the optical heads 13 and 14 detect the returned light beam, thereby making it possible to reproduce the optical information recorded on the optical tape 7.

In the fixed drum 15, a helical groove 24 is formed along the running area of the optical tape 7, and the groove 24 has a width narrower than the tape width of the optical tape 7.

In this embodiment, the tape width L1 of the optical tape 7 is 12.
5 (mm), and the information recording area 7C where the recording track is actually formed is located at the central portion 10[+] of the tape.
nm).

Therefore, the width dimension L2 of the groove portion 24 is 10 (m).
m:l and has a depth of 1 [fence], and the optical tape 7 has an upper end 7 where no recording track is formed.
A and the lower end 7B are in contact with the fixed drum 15.

In the above configuration, when the optical tape 7 is driven to run,
The optical tape 7 has an upper end 7A and a lower end 7B in sliding contact with the upper drum 15A and the lower drum 15B, while the stepped portion 2
2 on the groove 24.

Therefore, in the optical tape 7, the information recording area 7C is located on the fixed drum 15.
By traveling without contacting the information recording area 7C, it is possible to prevent friction scratches from occurring in the information recording area 7C.

Thus, according to the above configuration, it is possible to prevent the information recording area 7C of the optical tape 7 from deteriorating due to friction scratches, thereby making it possible to reliably record or reproduce optical information.

In the above-mentioned embodiment, the present invention was applied to an optical recording/reproducing device having a rotating disk equipped with optical heads 13 and 14 inside a fixed drum 15, but the present invention is not limited to this. However, the invention is not limited to this, but can be widely applied to optical recording/reproducing apparatuses that record or reproduce data while slidingly contacting the information recording area side of an optical tape.

Further, in the above embodiment, the width dimension of the optical tape 7,
12.5 (mm, ), width dimension 1
0 (nun) and depth 1 [body], the present invention is not limited to this, but the present invention is not limited to this, but the point is that the groove portion 24 having a narrower width dimension L2 than the width dimension of the optical tape can be formed. For example, effects similar to those described above can be obtained.

Furthermore, in the above embodiment, the case where the wrapping angle of the optical tape 7 was selected to be 180 degrees was described, but the wrapping angle is not limited to this, and various wrapping angles may be selected as necessary. can do.

In this case, the optical tape 7 may be wound by increasing or decreasing the number of optical heads depending on the angle.

Further, in the above embodiment, the optical tape 7 is wound helically around the fixed drum 15, but the present invention is not limited to this. Even in the case of winding in the right angle direction, the gap 16 for light beam emission may be formed in a helical shape accordingly.

Further, in the embodiments described above, the present invention is applied to the fixed drum 15.
Although the present invention is not limited to this, the present invention is also applicable to the guide post 20 that is adapted to guide the optical tape 7 while slidingly contacting it.
By providing grooves having the same structure as the above, it is possible to obtain the same effect as in the case of two sets.

0 Furthermore, in the above-described embodiment, the case of recording and reproducing optical information was described, but the present invention is not limited to this, and the present invention is not limited to this. It can be widely applied to recording/reproducing devices.

Further, in the above-described embodiment, a case has been described in which the present invention is applied to an optical recording and reproducing device 10 configured to optically record or reproduce, but the present invention is not limited to this, and the present invention is not limited to this. The same effect as in the above case can be obtained even when applied to the above case.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of an optical recording/reproducing device according to the present invention, FIG. 2 is a side view showing the structure of a groove portion according to the present invention, and FIG. 3 is a side view showing a conventional example. 4.15...Fixed drum, 4A, 15A...
...Upper drum, 4B, 15B...Lower drum,
7... Optical tape, 7C... Information recording area, lO... Optical recording and reproducing device, 13.14
. . . Optical head, 20 . . . Guide post, 24 . . . Groove. Effects of the Invention As described above, according to the present invention, by forming the grooves along the running direction of the optical tape, deterioration due to friction scratches can be prevented from occurring in the information recording area of the optical tape. This makes it possible to realize an optical recording and reproducing device that can reliably record or reproduce information even if it is repeatedly recorded and reproduced.

Claims (1)

[Claims] Desired information from an optical head is optically recorded on the optical recording medium by winding the optical recording medium helically around the guide and running the optical recording medium at a predetermined speed. Alternatively, in an optical recording and reproducing device configured to perform reproduction, a groove portion having a width narrower than the width of the optical recording medium is formed along the running direction of the optical recording medium in a portion of the guide that slides into contact with the optical recording medium. An optical recording/reproducing apparatus characterized in that the information is optically recorded or reproduced in a portion of the optical recording medium facing the groove portion.