JPH01243242A - Information recording and reproducing device - Google Patents

Abstract

PURPOSE:To effectively perform the cleaning of an objective lens and to automatically perform the cleaning of the lens at the time of exchanging a recording medium by providing a cleaning member on a carrying means to carry the recording medium to a loading completion position. CONSTITUTION:When a disk is loaded/unloaded, it is required to position a magneto-optical head 106 at a home position surely. When loading is started, the carrying means 107 of a disk cartridge is moved, and the surface of the objective lens 111 is rubbed with the thin brush 113 of the cleaning member 112, and the cleaning is finished completely when it passes the part. After the loading is completed, the cleaning means is housed at a position not to prevent the head 106 from moving, and adversely, when the disk cartridge is unloaded, the thin brush 113 is brought into contact with the objective lens 111 from a reverse direction, then, the cleaning is performed. Thus, the cleaning member can be mounted without changing the size of an optical head device.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an information recording and reproducing apparatus having cleaning means for an objective lens provided for recording and reproducing information from an optical information recording medium.

(Prior Art) Generally, in an optical disk device, information bits having a width of 1 to 2 μm and a length of $/1 to 3 μm are recorded on a recording medium.

To read information from this information bit, first a light beam is focused onto a minute spot using an objective lens and is irradiated onto the information bit. At this time, the incident light or transmitted light from the recording medium changes optically depending on the presence or absence of information1.By electrically detecting this change with a photodetector, it is possible to obtain a reproduction signal corresponding to the information bit. can.

In such an optical disk device, it is extremely important that the minute spot always accurately scan the information bit string of the recording medium element. For one child, autofocus is required to correct the shift in focus due to warping of the recording medium, and autotracking is required to correct the shift in the irradiation position due to eccentricity of the recording medium. As a method for realizing this autofocus function and autodragging function, there is an objective lens drive device N that does not move the objective lens in the autofocus direction and autotracking direction. 2. Since this device has a strong magnetic circuit and highly precisely machined bearings with sliding parts, it is usually fitted with a dustproof case to prevent dust from entering from the outside. However,
The objective lens soil surface serves as a path for the light beam to pass through the I-I moving range in the tracking direction, and the objective lens is always exposed. If it adheres to the surface of the disc, it becomes impossible to irradiate the disk with laser power that has a certain laser power, causing problems in recording and recording information.

(Problems to be solved by the invention) In order to solve this problem, a method was devised to periodically clean the objective lens. This is a method of cleaning an optical disc by providing a cleaning means in the cartridge and periodically using the cleaning cartridge.

However, with this cleaning method, it is necessary to periodically use the cleaning cartridge as described above under the user's supervision, and if the user neglects this management, the cartridge may remain completely uncleaned. In addition, as another cleaning method, the entire optical head is moved to the outside of the disk, and the objective lens is brought into contact with a cleaning member provided outside the disk to clean the entire optical head. There is a method of cleaning by vibrating in the racking direction.

With this method, cleaning can be performed automatically when loading or unloading the disc, saving the user's time and eliminating the above-mentioned inconveniences. However, when cleaning the objective lens, In this case, a space is required to accommodate the optical head outside the disk, resulting in an increase in the size of the device. Further, there are also problems such as the need for means for vibrating the light beam in the tracking direction.

SUMMARY OF THE INVENTION An object of the present invention is to provide an optical disk device that can automatically clean an objective lens by simple means, without increasing the size of the device, and without requiring any effort on the part of the user.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the information recording and reproducing apparatus of the present invention uses an objective lens to irradiate an optical information recording medium with a light beam to perform O1I recording. In an optical disk device that is an information recording and reproducing device that records and reproduces information recorded on a medium and has a mechanism for loading the recording medium into the main body of the information recording and reproducing device, the recording medium is moved to a loading completion position. The present invention is characterized in that a cleaning member is provided on the conveying means, and the cleaning member Ii'iI cleans the surface of the objective lens during loading and unloading of the recording medium.

(Function) In the present invention, the means for cleaning the objective lens of the information recording and reproducing apparatus described above is constructed by providing a cleaning member on the conveying means for conveying the recording medium to the loading completion position. By this means, when loading or unloading a recording medium into the apparatus main body, the cleaning member cleans the surface of the objective lens. Such an objective lens cleaning means is automatically performed when a recording medium is loaded or taken out when the apparatus is used, and does not require the user's intervention.

(Example) Examples of the present invention will be described below with reference to the drawings.

A magneto-optical disk device is used as a specific example of the information recording/reproducing device of the present invention, and its sectional views are shown in FIGS. 1(a) and 1(b). FIG. 1(a) is a diagram when a disk cartridge is inserted, and FIG. 1(b') is a diagram when a magneto-optical disk is clamped by a spindle motor.

In these figures, 102 has a magneto-optical disk 1 inside.
1 showing a disk cartridge containing 01,
The transport means 107 for transporting this disk cartridge is provided with a guide bin + 24, and this guide bin is guided along the 17-character 2FI+ guide hole 122 provided in the side plate 121 of the main foil. The disk cartridge is moved from the one disk cartridge insertion position shown in FIG. 1 (2) to the loading operation end position not shown in FIG. 1 (1)).

A magneto-optical shaft 106 is driven in the radial direction of the disk 1' by a drive mechanism (not shown) provided in the head frame 108. Reference numeral 109 denotes a turn daple, which applies the disk force when the disk cartridge is moved to the loading operation end position shown in FIG. 1(b).
- Hold the magneto-optical disk 101 housed in the cartridge from the side, lower the clamp holder 104 described later to clamp the magneto-optical disk 101, and attach the magneto-optical disk 101 to the head frame 100. It is rotated by a spindle (not shown). .

Further, 103 is a bias magnet, and this bias magnet 1
03 and the ten-marked lamp holder 104 are held by a holding member 105, and the holding member 105 is movable downwardly along a curved guide hole +23 provided in the side plate 121.

The magneto-optical head +06 is provided with an objective lens drive device +10 that does not move the objective lens 111 in the auto-tracking direction and the auto-tracking direction.

Furthermore, in this embodiment, a cleaning member 112 is fixed to the rear end of the memo transport means 107, and the F end of the cleaning member 112 is provided with fine bristles 11 made of polynisdel.
3 is flocked in one direction. These thin hairs 113 prevent the disk cartridge from moving from the disk cartridge insertion device υ to the end position of the loading operation shown in FIG. 1(a). fine hair 11
The tip of 3 (= 1 near) comes into contact with the surface of the objective lens 111 and acts to stroke the surface of the objective lens, so it is necessary to make the length of the fine hair 113 so as to exhibit this effect. .

Hereinafter, the operation of the head apparatus of this embodiment configured as described above will be explained.
The position of the magneto-optical head 106 is the Baum position, and it is always held at this position a)'/i'Iq' during disk loading, unroping, and inking.

When the loading of the disk is started at the position shown in FIG. The surface of the lens can be cleaned. and,
When the rope and the ink are completed, the cleaning means consisting of the cleaning member 112 and the fine bristles 113
As shown in Figure (b), the magneto-optical head 106 is housed in a position that does not interfere with its movement. Conversely, when the disk cartridge is unloaded, the fine bristles 113 can clean the surface of the objective lens 111 from a direction opposite to the indicated direction. .

The present invention is applicable not only to an information recording σ1 generation device for recording and reproducing information on a disk-shaped recording medium as described above, but also to an information recording and reproducing device in which a loading mechanism is used to load the information medium into the device main body. It can be applied to anything, if any.

(Effects of the Invention) As described in 1-1, according to the present invention, the objective lens can be effectively cleaned by simply removing the cleaning member or cleaning member without changing the size of the optical head device. It can be performed.

Further, according to the cleaning means of the present invention, it is possible to automatically clean the objective lens each time a recording medium is loaded into or removed from the apparatus without bothering the user.

[Brief explanation of the drawing]

FIGS. 1(a) and 1(t) are cross-sectional views showing an embodiment of the optical disc mounting of the present invention, and FIG. 1(a) is a diagram when a disc cartridge is inserted, and FIG. Figure 1 (
1)) is a diagram when a magneto-optical disk is clamped to a spindle motor. 101...Magneto-optical disk 102...Disk cartridge 106...Magneto-optical head 107...Transporting means 108...Head frame II+...Objective lens +12...Cleaning member +13...Fine hair

Claims (1)

[Claims] An information recording and reproducing apparatus that records and reproduces information recorded on the recording medium by irradiating an optical information recording medium with a light beam using an objective lens, the recording medium being loaded into the main body of the information recording and reproducing apparatus. In the information recording and reproducing apparatus having a mechanism, a cleaning member is provided in a conveying means for conveying the recording medium to a loading completion position, and the cleaning member cleans the surface of the objective lens during loading and unloading of the recording medium. An information recording/reproducing device characterized by: