JPH0358331A - Optical disk device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [{Already Required]] An object of the present invention is to provide an optical disk device that is equipped with a cleaning mechanism that can clean the surface of an objective lens at any time. an optical head equipped with an objective lens for transmitting and receiving light to and from the optical disk; the objective lens mounting position of the optical head is moved in the radial direction of the optical disk; a rough drive mechanism; a tape feeding means for supplying/recovering a single-sided weakly adhesive tape onto the objective lens which is positioned and locked; and a tape feeding means for supplying/recovering the single-sided weakly adhesive tape with its adhesive surface facing the objective lens; The cleaning mechanism is provided with a cleaning mechanism having a pressing means for pressing the pressing rod so as to bring the pressing rod into close contact with the surface.

[Industrial application field]

Optical disk devices are computer memory devices that are used in a wide range of applications from small to large sizes, from image data files to electronic computer memories due to their large capacity, interchangeability, and high reliability. Therefore, they may be used in harsher conditions than office automation environments.

[Conventional technology]

FIG. 3 shows a schematic diagram of the main parts of a conventional optical disc device. In the figure, l is a frame serving as a base, 2 is a moke fixed to the frame 1, 3 is a spindle shaft that transmits the rotational output of the motor 2, 4 is an optical disk fitted to the spindle shaft 3, and 5 is an optical disk 4 5a is an objective lens mounted on the lens barrel of the optical head 5; 5b is a roller guided in the radial direction of the optical disk 4 by a guide rail (not shown); 6 is an optical head 5; 2 shows an optical head coarse drive mechanism that drives the optical head in the radial direction of the optical disk 4.

This optical disc device includes an optical head 5 to an optical disc 4.
Information is recorded by irradiating a light beam onto the disk, and information is reproduced by detecting the reflected light. That is, a light beam is irradiated from the light source of this optical head 5, and this light beam is focused by the objective lens 5a of the optical element to focus on the optical disk 4, and by heating it, a small hole called a focus is formed. , records information. Furthermore, information is reproduced by irradiating a light beam focused by an objective lens 5a onto a focal point formed on the optical disc 4, and detecting the reflected light.

However, the objective lens 5a is attached to the tip of the optical head 5, and the lens has a slightly lowered concave shape within the lens barrel that supports the objective lens 5a, making it easier for cigarette smoke and dust to adhere to the objective lens. It has a shape.

Therefore, dust floating inside the casing of the optical disk device or dust entering from the outside adheres to the surface of the objective lens 5a.
There is a problem in that the power of the laser beam changes depending on the surface condition of the objective lens 5a, and the conditions for recording and reproducing information on the surface of the optical disk change.

In an optical disc device, since it is necessary to replace the optical disc 4, which is an information recording medium, the optical head 5 for reading or writing information, especially the objective lens 5a located opposite the optical disc 4, must be replaced from the outside. It is not possible to create a completely shielded structure.

Therefore, as a means to solve this problem, optical disc 4! ! A cleaning brush is attached to a turntable or the like placed on the optical head 5, and the cleaning brush is rotated by rotating the turntable (referred to as a cleaning disk). The dust adhering to the lens 5a has been cleaned.

[Problem to be solved by the invention]

According to the above-mentioned cleaning method, there is a drawback that cleaning cannot be performed when the mounted optical disc is used continuously.

The present invention has been made in view of the above-mentioned conventional drawbacks, and an object of the present invention is to provide an optical disk device equipped with a cleaning mechanism that can clean the surface of an objective lens at any time.

[Means to solve the problem]

FIG. 1 is a front view showing the general structure of the present invention, and FIG.
FIG. 2 is an enlarged side view of the main part of the figure. An optical head 5 equipped with an objective lens 5a that transmits and receives light to and from the optical disk 4. The objective lens mounting position of the optical head 5 is moved in the radial direction of the optical disk, and the optical head is further extended to be positioned and locked outside the outer edge of the optical disk. a head rough drive mechanism 6a; a tape feeding means for supplying/recovering the single-sided weak adhesive tape 8 onto the objective lens which is positioned and locked, with the adhesive surfaces facing each other;
A cleaning mechanism 7 having a pressing means for pressing a pressing rod 74 so as to bring the adhesive surface of the one-sided weak adhesive tape into close contact with the lens surface of the objective lens is provided.

[For production]

When cleaning, use the optical head rough drive device 6.
a, the part of the optical head 5 where the objective lens 5a is attached is positioned and locked at a position facing the one-sided weak adhesive tape 8 supplied by the tape feeding means of the cleaning mechanism 7, and in this position, the trasoking mechanism and focusing of the objective lens 5a are carried out. Lock the side of the machine. Next, the tape feeding means is driven to feed the necessary tape length, and the new surface coated with the weak adhesive material is brought to face the objective lens 5a.

Next, the pressing means is driven to lightly press the pressing rod 74 against the non-adhesive surface of the single-sided weakly adhesive tape 8 so that the adhesive surface facing the objective lens 5a is brought into close contact with the lens surface of the objective lens. As a result, dust adhering to the lens surface of the objective lens 5a is removed, and the pressing rod 74 is separated. After repeating this operation several times to perform complete cleaning, the optical head 5 is returned to the normal tracking area of the optical disc 4 by the optical head coarse drive mechanism.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

In order to make it easier to understand the explanation of the structure and operation, the same parts are given the same reference numerals throughout the drawings, and their repeated explanation will be omitted.

FIG. 1 is a front view showing the general structure of the present invention, and FIG.
An enlarged side view of the main part of the figure is shown. In both figures, 6a is the third
This is an optical head coarse drive mechanism which has the function of the optical head coarse drive mechanism 6 explained in the drawings and further has a function of positioning and locking the optical disk 4 outside the outer edge thereof. A cleaning mechanism 7 is provided opposite to the objective lens 5a of the optical head 5, which is positioned and locked outside the outer edge of the optical disk 4, and is connected and fixed to the frame 1 by a support arm 7a.

Reference numeral 8 is a single-sided weak adhesive tape, in which one side is an adhesive coated with a weak adhesive and the back side is a non-adhesive side. The sticky side is coated with a weak adhesive, which is known for adhesive sticky notes that can be repeatedly pasted and peeled off without damaging the recipient.

The one-sided weakly adhesive tape 8 is wound around a tape feeding means consisting of a pair of reels 72a and 72b rotatably mounted on the cassette outer casing 71.

Each time the tape feeding means performs cleaning, the reel 72a,
By rotationally driving the tape 72b, there is an opportunity to supply/recover a necessary amount of the single-sided weakly adhesive tape 8 with the adhesive surface facing the objective lens 5a which is positioned and locked.

The one-sided weakly adhesive tape 8, which is supplied with its adhesive surface facing the objective lens 5a, is connected to a press drive unit 73 mounted on the outside of the cassette tray N71, and a press plate 7 driven by the press drive unit 73.
By lightly pressing the pressure stick 74) so that the adhesive surface of the single-sided weakly adhesive tape 8 comes into close contact with the lens surface of the objective lens 5a, the dust adhering to the lens surface is removed from one side by the pressing means consisting of 4. It is transferred to the adhesive surface of the adhesive tape 8 and cleaning is performed. The tip of the pressing rod is pre-shaped into a shape that allows it to be brought into close contact with the lens surface with a one-sided weak adhesive tape 8 interposed therebetween. After restoring the pressure bar 74, this operation is repeated multiple times to obtain a complete cleaning effect. After cleaning is completed, the optical head 5 is returned to the normal tracking area of the optical disk 4 by the optical head rough drive mechanism 6a.

Furthermore, when the objective lens 5a is made of a soft material such as aspherical plastic, the lens barrel portion of the optical head 5 may be opened. By sealing the end with a flat hard transparent member and cleaning the surface of the hard transparent member, scratches on the lens surface can be avoided.

(Effects of the Invention) As is clear from the above explanation, according to the present invention, the cost is lower than that of using a conventional cleaning disk.
In addition, since it is a built-in mechanism in the optical disk device, it can be automatically cleaned during continuous use of the optical disk, and maintenance is easy as all you need to do is replace the tape, which has the effect of ensuring long-term high reliability of the optical disk device. There is.

[Brief explanation of drawings]

FIG. 1 is a front view showing the general structure of the present invention, and FIG.
FIG. 3 is an enlarged side view of the main parts of the figure, and FIG. 3 shows a structural diagram of the main parts of a conventional optical disc device. 1 and 2, 4 is an optical disk, 5 is an optical head, 5a is an objective lens, 6a is an optical head rough drive mechanism, 7 is a cleaning mechanism, 8 is a single-sided weak adhesive tape, 74
indicate the pressure rods, respectively. From the warehouse gE○R interlock bee not T front view Figure 1 Diagram perforated / 1 vote Sokumakura Dairyu is Ba blade Figure 2

Claims (1)

[Claims] Objective lens (5a) that transmits and receives light to and from the optical disc (4)
an optical head coarse drive mechanism (6a) that moves the objective lens mounting position of the optical head (5) equipped with the optical head in the radial direction of the optical disc, further extends the optical head to position and lock the position outside the outer edge of the optical disc; tape feeding means for supplying/recovering a single-sided weak adhesive tape (8) onto the objective lens which is positioned and locked, with the adhesive surfaces facing each other; An optical disc device comprising: a cleaning mechanism (7) having a pressing means for pressing a pressing rod (74) so as to bring the pressing rod (74) into close contact with each other;