JPH0521337U - Optical head cleaning member - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a cleaning member capable of improving the cleaning effect of an optical head and avoiding scratches on the optical head. [Structure] Each brush bristle of a cleaning member that comes into contact with an optical head such as a CD is processed into a spherical tip. Processing methods include UV potting, thermal deformation, and polishing.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a shape of brush bristles for cleaning an optical head such as an objective lens provided in a reproducing device such as a CD laser disk.

[0002]

[Prior Art]

 Optical discs and magneto-optical discs are used to record sound information, image information, computer data and programs, which are set on a playback device or playback recording device, rotated, and irradiated. It is designed to receive reflected light. Since the surface of the lens of this optical head is exposed to the internal space of the disk device, dust is likely to adhere to it, which is likely to adversely affect the recording or reproducing of information.

For this reason, there is known a maintenance board body in which a cleaning means such as a brush is provided on a board body having the same shape and size as the disk board. It is also conceivable to install a cleaning device directly in the optical disk reproducing device and automatically clean the optical head. A brush is generally used for such cleaning means.

[0004]

[Problems to be solved by the device]

 In this way, a brush is used to clean the optical head, but the surface of the optical head is easily scratched, and in addition to relatively slight dust, stubborn dirt such as oil film and cigarette dust adheres to it. Therefore, the conventional brushes did not have a sufficient cleaning effect.

Therefore, an object of the present invention is to provide a cleaning member that can satisfactorily remove stubborn dirt that could not be removed by a conventional brush and that does not damage the surface of the head.

[0006]

[Means for Solving the Problems]

 For this reason, the present invention comprises a cleaning member for an optical head, which is composed of a bristles having a spherical tip.

[0007]

[Action]

 According to the above construction, the spherical tip portion comes into point contact with the head surface to scrape off dirt and has a uniform curved surface, which prevents damage to the head surface.

[0008]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of a maintenance board. This board 10 has a substantially same shape as a 12 cm CD. A TOC (Table of Contents) area A, a start greeting text recording area B, a check signal recording area C, a cleaning area D, and an end greeting text recording area E are independently provided for each track from the inner peripheral side of the board 10. It is provided. The areas B, C, D, and E correspond to the track selection operation of the disk device 30 (see FIG. 2), and specifically correspond to the music selection buttons 1, 2, 3, and 4 of the disk device 30. .. In the TOC area A, a signal for listing the contents of the board 10 on the disk device 30 side is recorded. When the board 10 is set in the disk device 30, the optical head 20 in the device 30 reads from the TOC area A. To start. As the disc device 30, in addition to a CD player, a laser disc or a device having a reproducing function for both of them can be considered.

After reading the TOC area A, the optical head 20 moves to the greeting text recording area B, which is the first track, and a message that informs the user how to handle the board 10 is reproduced.

Specifically, “Thank you for purchasing the XX. This time. When you press the song selection button 2, a check signal that allows you to check the AV equipment used by the customer is played. When button 4 is pressed, the optical head of the disc playback device used by the customer is cleaned. "Is played back, and the song selection button in the disc device 30 used by the user is played. Notify the correspondence between 31 and the function of the board 10.

Here, the user can individually select the function he / she wants to use with the music selection button 31 in the disk device 30, but if the user does not operate the music selection button 31, the user can automatically select the second function. After moving to the track, the check signal reproducing function works, and then the cleaning function of the lens 21 of the optical head 20 of the third track works.

In the check signal recording area C which is the second track, specifically, a system check signal capable of determining whether or not the system is properly connected, a wide area, a low frequency reproduction limit check, etc. A signal or the like capable of being recorded is recorded. Finally, a message indicating that the reproduction of the check signal is completed is reproduced.

The cleaning area D, which is the third track, has a cleaning start command area D1 in which a message that cleaning is started is recorded, and a cleaning execution area in which a flocked body 22 such as a brush as a cleaning means is erected. D3 and fall prevention regions D2 and D4 on both sides of this cleaning execution region D3. In the cleaning start command area D1, a command message such as "Please press the music selection button 4 for cleaning" is recorded. Also, in the cleaning execution area D3, an abnormal sound such as a beeping sound and a sound of a caution message indicating that the cleaning should be immediately stopped such as "Please press the music selection button ○ or the stop button to immediately stop the cleaning" are recorded. Has been done.

In the cleaning execution area D3, a width of 0. A flocked body 22 such as a brush having a height of about 3 mm is planted in a mounting hole 23 having a length of about 6 mm and a length of about 8 mm, and the tip of this flocked body 22 contacts the surface of the lens 21 (see FIG. 3). Further, the fallen hair countermeasure regions D2 and D4 are safety regions secured so that the reading of the pickup head 20 in both the above-mentioned regions D1 and E will not be adversely affected even if the hair transplant body 22 falls over sideways.

By the way, the optical head 20 is strongly contaminated with dirt such as smoke from cigarettes, and such dirt cannot be removed by a simple linear brush. Therefore, as shown in FIGS. 4 (a), 4 (b) and 4 (c), each brush bristle of the flocked body 22 has a spherical tip 33. Each of the brush bristles 32 has a cross-sectional diameter of 30 to 100 μm, and is brought into contact with the surface of the optical head 20 in a slightly inclined state due to centrifugal force and air resistance due to the rotation of the disk body. Since there is no such corner, the surface of the optical head 20 is not damaged.

Moreover, when the enlarged portion is formed at the tip as shown in FIG. 4A, the point contact with the head 20 is surely obtained, and the cleaning effect is improved. In particular, when the head 20 has a spherical lens shape, the contact position of the tip 33 with the spherical shape changes with the movement of the brush bristles 32, and the same point does not continuously abut and abnormal wear of the tip is suppressed. it can. In order to obtain such a shape, a radiation curable resin that is cured by ultraviolet rays or electron beams, for example, an oligoester acrylate or urethane acrylate type radiation curable resin may be applied to the tip 33. A specific example will be described with an ultraviolet curable resin (trade name: PH C-2015 (S) manufactured by Dainichiseika Co., Ltd.). Polyester acrylate 30 parts Polyfunctional acrylate monomer 40 parts Bifunctional acrylate monomer 25 parts Photoinitiator 4 parts Paint Additive 1 part ────────────────────── 100 parts of UV curable resin, add 200-400 parts of thinner to 100 parts of the above mixture Dilute to about 30 to 100 cps, immerse the tip of the bristles in this uncured state, and then pull up.

Next, the tips of the brush bristles are curled in a drop shape due to surface tension, and the brush bristles are irradiated for 5 to 8 seconds on an 80 W / cm ultraviolet irradiation lamp having a main wavelength of 365 nm to cure the bristles. ..

Since such a radiation curable resin generally has high chemical resistance and stain resistance, it is possible to further enhance the cleaning effect by applying a cleaning liquid such as isopropyl alcohol.

Further, various manufacturing methods such as chemical softening change with a chemical or the like, or heat softening to cause self-contraction or pressure deformation can be applied. Further, as shown in FIG. 4 (c), a taper formed by a means such as polishing may be considered. When the tip 33 is formed in this manner, the optical head is maintained while maintaining the bending force of the bristles 32 and the strength of the waist. The contact load on 20 can be reduced, and finer dust can be removed.

As shown in FIG. 3, the brush bristles 32 are bundled and embedded in the concave or through hole-shaped mounting holes 23. Of course, it may be detachable and replaceable. By the way, it is desirable that the contact resistance between the flocked body 22 and the optical head 20 is as small as possible. Therefore, as shown in FIG. 6 (a), the entire body of the optical head 20 in the width direction does not contact the flocked body 22 at the same time. It is preferable to implant one by one or in a bundle unit at an angle α with respect to the radiation direction of 10. FIG. 6 (b) shows an embodiment in which a spiral shape is planted in order to further reduce the contact resistance.

In any of the embodiments, in order to prevent reattachment of the removed dust to the flocked body 22, it is better to plant the slanted direction toward the rotation direction of the board 10. Further, in order to reduce the contact resistance between the flocked body 22 and the optical head 20, as shown in FIG. At this time, hair fall and mere flexion are likely to occur. Therefore, as shown in FIG. 6 (d), the root is left as it is and the tip side is formed in an uneven shape, and the interval L between the convex portions is larger than the width l of the optical head 20. It is also possible to set it wide. In this case, the tip of only the long bristles on the convex side is formed into a spherical shape.

Furthermore, as shown in FIG. 6E, the contact resistance can be reduced even if the density of the brush bristles is changed.

When the message in the cleaning start command area D1 is heard and the music selection button 4 is pressed, the end greeting message recorded in the end greeting message recording area E, which is the fourth track, is reproduced by jumping over the cleaning area D. It When the optical head 20 jumps over the cleaning area D 1, the lens 21 moves in the radial direction while contacting the flocked body 22 rotating at high speed, and the lens cleaning is completed.

As described above, the optical head 20 jumps in the radial direction from the cleaning start command area D 1 to the end greeting message recording area E, so that the cleaning of the lens 21 is instantaneously performed, and the excessive cleaning of the lens 21 is performed. Is avoided.

When the user uses the maintenance disc body 10 of the optical disc device having the above-described configuration, first, the disc body 10 is set on the disc device 30. If the board 10 is set and the user does nothing, the signal recorded in the TOC area A of the board 10 causes the reproduction of the first track start greeting message recording area B first. The user selects the music selection button 31 of the disc device 30 according to the reproduction content. If you select the music selection button 2 or leave it as it is, the signal, audio, etc. in the check signal recording area C of the second track is played back, and the user can check the system and capability of the AV equipment used. I can do it. When the check ends, the end message is played. Then, the message in the cleaning start command area D1 is reproduced to prompt the user to press the music selection button 4 to perform the cleaning of the lens 21. Then, when the user presses the music selection button 4, the optical head 20 jumps over the cleaning area D of the third track and the end greeting of the fourth track E is reproduced. When the lens 21 of the optical head 20 jumps over the cleaning area D, the lens 21 contacts the flocked body 22 and is cleaned.

Here, unless the user misses the message in the cleaning start command area D1 and presses the music selection button 4, the optical head 20 does not jump to the fourth track E and the normal sound reproduction is performed. Similarly, since the cleaning execution area D3 is slowly moved at a low speed, the lens 21 is excessively cleaned for a long time and the lens 21 is damaged. Therefore, in this case, a caution message such as a beeping sound recorded in the cleaning execution area D3 is reproduced, and the user is urged that the cleaning should be immediately stopped, and the user accordingly follows the disc device 30. The cleaning operation may be immediately stopped by operating the button 31 of. Of course, if it is desired to perform only cleaning, the board 10 may be set and the song selection button 4 may be selected immediately or during the reproduction of the start greeting.

The operation by the other music selection buttons is as shown in FIG. In the above-described embodiment, the check signal recording area C and the cleaning area D are provided independently of each other in terms of placement and signals, so that one board 10 is completely different for maintenance. The functions can be arbitrarily exerted by the user, either individually or continuously.

Further, since the flocked body 22 is planted on the outer peripheral side of the execution area C of the check signal reproducing function, the dust removed by the cleaning moves outward due to the centrifugal force, and the check signal recording area is formed. A good check signal reproducing function can be maintained without any adverse effect on the C surface.

In the above-mentioned embodiments, the CD has been mainly described, but as the optical disc, there are laser discs, magneto-optical discs, etc. other than the CD, and not only for music and images but also for computer data and program recording. Including. In addition to the disk type described above, the cleaning body of the optical head can be applied to the shape of the flocked body of the cleaner that is built into the reproducing device and automatically cleans.

[0030]

[Effect of the device]

 As described above, according to the present invention, the cleaning member of the optical head 20 is constituted by the brush bristles 32 whose tip 33 is formed into a spherical shape. There is no more risk of scratching the head surface.

[Brief description of drawings]

FIG. 1 is a plan view of a board according to the present invention.

FIG. 2 is a perspective view of a disk device in which the board according to the present invention is used.

FIG. 3 is a perspective view of a hair-implanted body implanted in a board according to the present invention.

4A is a front view of the brush bristles according to the present invention, FIG. 4B is a front view showing another embodiment of the bristles of the present invention, and FIG. 4C is a further view of the bristles of the present invention. Front view showing an embodiment

FIG. 5 is a flowchart showing the functions of the board according to the present invention.

6 (a), (b) and (c) are plan views showing a modification of the arrangement of the flocked body, and (d) and (e) are front views showing a modification of the flocked body.

[Explanation of symbols]

 32 brush hair 33 tip

Claims (1)

[Scope of utility model registration request] 1. A brush bristle 3 having a spherical tip 33.
An optical head cleaning member consisting of two.