JP3137338U - Optical pickup apparatus with circular or slit-shaped perforated shielding plate and optical disk recording / reproducing apparatus provided with objective lens cleaning port of optical pickup - Google Patents

Abstract

PROBLEM TO BE SOLVED To improve the sound quality and image quality of an optical disc by solving the problem of irregular reflection of laser light from the optical disc recording surface on the optical pickup side.
The optical disk recording / reproducing apparatus of the present invention has a surface finish that absorbs light in order to suppress unnecessary noise signals due to irregular reflection of laser light from the optical disk and not to affect the laser light necessary for recording / reproducing. A circular or slit-shaped perforated shielding plate is attached mechanically independent of the optical pickup mechanism, and in the tray type optical disk recording / reproducing device, a new cleaning port is provided in the chassis and sub-chassis. It can be cleaned with a camera lens cleaner.
[Selection] Figure 11

Description

  This device is about CD player, SACD player, DVD audio player, MD recording / reproducing device, CD-R / RW, DVD player, DVD-RAM, DVD-R / RW.

  Although the optical disc is excellent in durability, the influence of the laser light irregular reflection from the optical disc recording surface on the sound quality and image quality has been investigated because the sensor of the optical pickup is non-contact with the recording surface of the disc. Although an improvement method by edge processing of an optical disk has been devised, the apparatus is expensive, and there is a possibility of scratching the recording surface of the disk, which is not general.

  An object of the present invention is to solve the problem of irregular reflection of laser light generated from an optical disk recording surface on the optical pickup side.

  The optical disk recording / reproducing apparatus according to the present invention suppresses unnecessary noise signals due to irregular reflection of laser light from the optical disk and does not affect the laser light necessary for recording / reproduction, so that it has a circular or slit shape with a surface finish that absorbs light. The perforated shield plate is mounted mechanically independent of the optical pickup mechanism, but the sound quality and image quality are improved, but the lens cannot be cleaned with a cleaning disk. In this case, a new cleaning port is provided in the chassis, sub-chassis, etc., and cleaning with an existing camera lens cleaner is possible.

  The optical pickup according to the present invention has an effect of suppressing a noise signal due to irregular reflection from an optical disk by a shielding plate having a hole opened to a minimum diameter necessary for recording and reproduction of audio and video, and reproducing a CD with a clear sound quality. Machine, SACD player, DVD audio player, MD recorder / player, CD-R / RW, DVD player with clear sound quality / image quality, DVD-RAM, DVD-R / RW.

The simplest implementation is possible by attaching a circular or slit-shaped perforated shielding plate with double-sided tape to an existing optical pickup such as a CD and DVD player. Whether the shape of the hole is circular or slit depends on whether the perforated shielding plate can be directly attached to the optical pickup casing. It is important that the size of the hole in the shielding plate be as small as possible under conditions that do not affect recording and reproduction.
For mass production, it is desirable to use screws instead of fixing the perforated shielding plate using double-sided tape.
A perforated shielding plate is manufactured as a single component for remodeling and can be applied to an existing optical disc recording / reproducing apparatus.
In the case of a tray-type optical disk recording / reproducing device, dirt on the optical pickup is usually removed with a cleaning disk, but this method cannot be used if a perforated shielding plate is attached to the optical pickup. This can be solved by opening the cleaning port and blowing off dust with a lens cleaner for the camera.

In FIG. 1, reference numeral 1 denotes a perforated shielding plate, which has a hole with a minimum diameter necessary for recording and reproducing audio / video signals as shown in FIG. 2, and suppresses unnecessary noise signals due to irregular reflection from the optical disk. To do.
FIG. 2 is a view in which a perforated shielding plate is mounted on an optical pickup, and is fixed to a casing 5 using screws. Reference numeral 3 denotes a main body of the optical pickup, which has an objective lens 4.
3 and 4 show a perforated shielding plate integrated with an optical pickup casing.
5 and 6 are examples in which a circular perforated shielding plate is directly attached to an optical pickup.
7 and 8 show an example in which a slit-like perforated shielding plate is attached to the casing side of the optical disc recording / reproducing apparatus when the perforated shielding plate cannot be directly attached to the optical pickup.
9 and 10 show that the shielding plate is made as a single component and attached to an existing optical pickup using double-sided tape.
FIG. 11 shows an objective lens cleaning port provided in a chassis and a sub chassis of an optical disk recording / reproducing apparatus having an optical pickup with a perforated shielding plate so that the optical pickup can be easily cleaned by an existing lens cleaner.

Increasing the performance of AV equipment will lead to an increase in the purchasing range of equipment for general households and sales expansion of sluggish disks.
This improvement effect can also contribute to music culture by spreading to broadcasting stations and recording studios.

It is the top view which showed the optical pick-up which fixed the circular perforated shielding board with the screw. It is sectional drawing which showed the optical pick-up which fixed the circular perforated shielding board with the screw. It is the top view which showed integration with the circular perforated shielding board and the casing of an optical pick-up. It is sectional drawing which showed integration with the circular perforated shielding board and the casing of an optical pick-up. It is the top view which attached the circular perforated shielding board directly to the casing of the optical pickup. It is sectional drawing which attached the circular perforated shielding board directly to the casing of the optical pick-up. It is the top view which attached the slit-shaped perforated shielding board to the casing side of the optical disk recording / reproducing apparatus. It is sectional drawing which attached the slit-shaped perforated shielding board to the casing side of the optical disk recording / reproducing apparatus. It is the top view which showed that the perforated shielding board made as a single-piece | unit was attached to the existing pick-up using the double-sided tape. It is sectional drawing which showed that the perforated shielding board made as a single component was attached to the existing pick-up using the double-sided tape. If the objective lens cleaning port is opened in the chassis and sub chassis of the optical disk recording / reproducing device with a perforated shielding plate, and cleaning is performed using an existing lens cleaner, the tip of the cleaner does not reach the objective lens. Use an extension tube. The optical disk recording / reproducing apparatus is placed with the dust-proof lid closed except when cleaning the lens. It is sectional drawing which showed these things.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Circular perforated shielding plate 2 ... Hole 3 ... Optical pickup mechanism 4 ... Objective lens 5 ... Optical pickup casing 6 ... Screw 7 ... Circular perforated shielding plate / optical pickup casing 8 ... Turntable 9 ... Casing 10 of optical disk recording / reproducing apparatus ... Slit perforated shielding plate 11 ... Double-sided tape 12 ... Sub-chassis 13 ... Chassis 14 ... Object lens cleaning port 15 ... Dust-proof lid 16 ... Pre-made lens cleaner 17 ... Extension tube

Claims (2)

  A circular or slit-shaped perforated shielding plate with a surface finish that absorbs light so as to suppress unnecessary noise signals due to irregular reflection of laser light from the optical disk recording surface and not affect the laser light necessary for recording and reproduction. The optical pickup device is characterized by high sound quality and high image quality, mounted mechanically independent of the optical pickup mechanism.   A circular or slit-shaped perforated shielding plate with a surface finish that absorbs light so as to suppress unnecessary noise signals due to irregular reflection of laser light from the optical disk recording surface and not affect the laser light necessary for recording and reproduction. A tray-type optical disk recording / reproducing apparatus provided with an optical pickup device characterized by high sound quality and high image quality, which is mounted mechanically independent from the optical pickup mechanism, and provided with an objective lens cleaning port of the optical pickup.

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