JPH0443335B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a cleaning device for an information recording carrier on which information signals are recorded concentrically or spirally.

BACKGROUND TECHNOLOGY Among devices in which reproduction is performed by a reproduction needle that slides into contact with an information recording carrier on which various information signals are recorded, an electrode is provided on the reproduction needle, and the reproduction needle follows the recording locus of the information recording carrier. In the method of reading the information signal as a change in capacitance by scanning along the same line (hereinafter referred to as capacitance method), the signal surface on which the information signal is recorded is in close contact with the sliding surface of the reproducing needle electrode. is required to be certain.

For example, the depth of the unevenness on the signal surface of the information recording carrier on which the information signal is recorded is several thousand Å and the width is about 10000 Å, and the thickness of the sliding contact surface of the electrode is several 1000 Å and the width is also about several 1000 Å. Even if a minute gap occurs between the signal surface and the sliding contact surface of the reproducing needle electrode, it becomes impossible to satisfactorily detect changes in capacitance corresponding to the information signal recorded on the information recording carrier. . For example, the distance between the signal surface and the sliding contact surface of the electrode is approximately
It has been experimentally confirmed that when the thickness is 700 Å, the detected signal level is reduced by about 30% in terms of noise ratio compared to when the sensor is in close contact. The cause of the gap between the signal surface and the sliding contact surface of the electrode is due to the geometrical characteristics (undulations) of the surface of the information recording carrier itself, and due to the information recording carrier material and other foreign particles in the air. , due to the presence of the signal between the signal surface and the regenerated needle slide contact surface,
The latter accounts for a larger proportion than the former.

Therefore, various cleaning devices have been proposed for cleaning the surface of the information recording carrier in order to maintain uniform contact between the information recording carrier and the reproducing needle.

An example of the above-mentioned conventional information recording carrier cleaning device will be described below with reference to the drawings.

FIG. 3 shows the installed state and operating state of a conventional information recording carrier cleaning device. In FIG. 3, the information recording carrier 10 rotates in the direction of arrow d.
A part of the cleaning member 15 provided in the rotation drive unit 14 of the information recording carrier cleaning device 13 is in contact with the surface of the cleaning member 15 . As shown in FIG. 4, this information recording carrier cleaning device 13 is mounted on the surface of the information recording carrier 10 in such a manner that the central axis of rotation of a rotary drive unit 14 is inclined at a predetermined angle with respect to the perpendicular direction. There is. Although not shown, the information recording carrier cleaning device is attached to the transfer table of the signal pick-up cartridge, and the rotation drive unit 14 is moved up and down by a changeover switch, and the cleaning member 15 is moved up and down by a changeover switch.
is configured so that it can be switched between contact and non-contact with the information recording carrier 10 as necessary.

The operation of the conventional information recording carrier cleaning device configured as described above will be described below.

When a part of the cleaning member 15 of the information recording carrier cleaning device comes into contact with the rotating information recording carrier 10, a frictional force is generated between the two, and the rotational drive section 14 rotates, and the cleaning member 15 is attached to the rotational drive section. The cleaning member 15 rotates and comes into contact with the information recording carrier 10 to remove foreign matter such as dust adhering to the information recording carrier 10.

(For example, Patent Application No. 59-175518) Problems to be Solved by the Invention However, in the above configuration, the information recording carrier cleaning device is attached to the transfer table of the signal pick-up cartridge, so it is possible to check the degree of contamination of the cleaning member. Furthermore, it is very difficult to replace the cleaning member, and if the information recording carrier is cleaned with a heavily soiled cleaning member, there is a problem in that the surface of the information recording carrier is scratched by the cleaning member.

In view of the above problems, the present invention provides an information recording carrier cleaning device that can easily clean information recording carriers.

Means for Solving the Problems In order to solve the above problems, the information recording carrier cleaning device of the present invention has a casing equipped with a cleaning member, the casing being a signal pick-up cartridge of an information signal reproducing device. The cleaning member is replaceable and can be attached to the information signal reproducing device, and the cleaning member is in contact with the surface of the information recording carrier in a rotating state when the casing is attached to the information signal reproducing device. It is something.

Effects According to the present invention, by replacing the information recording carrier cleaning device with the signal pick-up cartridge and installing it in the information signal reproducing device, the present invention facilitates the replacement of the cleaning member, and always uses a new cleaning member for optimum performance. This allows cleaning under certain conditions.

Embodiment An information recording carrier cleaning device according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a side view of an information recording carrier cleaning device according to an embodiment of the present invention. In FIG. 1, 101 is a housing, 102 is a rotation drive unit, and 10
3 is a cleaning member, 104 is a double-sided tape for fixing the cleaning member 103 to the rotary drive unit 102, 105 is a slider to which the rotary drive unit 102 is attached and can be moved up and down, 106 is a shaft for sliding, and 107 is for adjusting the pressing force. 108 is a shaft nut, 109 is a positioning pin, 111 is an information recording carrier, and 112 is a transfer table.

The operation of the information recording carrier cleaning device configured as described above will be described below with reference to FIGS. 1 and 2.

First, FIG. 2 is a sectional view taken along the line AA' of the information recording carrier cleaning device shown in FIG. 11 in Figure 2
0 is the rotation axis of the rotation drive unit 102.

As shown in FIG. 1, the information recording carrier cleaning device mounted on the transfer table 112 in place of the signal pick-up cartridge is equipped with a rotation drive section 102, and the rotation drive section 102 has a cleaning member 103.
is attached using double-sided tape 104. The cleaning member 103 cleans the information recording carrier 11 on which a transfer table 112 equipped with an information recording carrier cleaning device rotates.
1, the information recording carrier 111
come into contact with In the above state, the rotation drive unit 102
Since the cleaning member 103 is attached at a predetermined angle with respect to the vertical direction of the surface of the information recording carrier 111, a part of the cleaning member 103 is attached to the information recording carrier 111 by the pressing force defined by the coil spring 107. By contacting the surfaces, a frictional force is generated between the two, and the rotation drive unit 102 rotates, and the cleaning member 103 attached to the rotation drive unit 102 rotates and cleans the information recording carrier 11.
It will be in contact with 1. In the above state, the entire surface of the information recording carrier 111 can be cleaned by reciprocating the transfer table 112 equipped with the information recording carrier cleaning device between the outermost circumference and the innermost circumference of the information recording carrier 111. It becomes possible.

Suitable materials for the cleaning member 103 include, for example, soft cloth with long piles or nonwoven fabric with low hardness.
Information recording carrier 111 with 03 tilted several degrees
When the cleaning member 103 has a width of several millimeters and comes into contact with the information recording carrier 111, the transfer speed of the transfer table 112 when cleaning the information recording carrier 111 is at most several thousand seconds during normal playback. It is possible to move up to twice as fast, but the movement speed is several hundred times faster.
By reciprocating between the outermost circumference and the innermost circumference of the information recording carrier 111 about three times, it adheres in a very short time (about 1 minute) without damaging the surface of the information recording carrier 111. It has been experimentally confirmed that dust and the like can be cleaned.

Further, the information recording carrier cleaning device is made removable, and the cleaning member 103 is replaced with double-sided tape 104, for example.
By using a structure in which the cleaning member 103 is affixed to the rotary drive unit 102, the degree of contamination of the cleaning member 103 can be visually confirmed and
3 becomes very easy to replace.

Furthermore, in this embodiment, the cleaning member 103 comes into contact with the rotating information recording carrier 111, so that the cleaning member 103 cleans while rotating. A cleaning member 103 made of a long moquette or the like is brought into contact with the information recording carrier 111 with a constant pressing force to clean the information recording carrier 1.
It has been experimentally confirmed that the information recording carrier 111 can be cleaned without any practical problem by reciprocating between the outermost circumference and the innermost circumference in the radial direction of the information recording carrier 11 a plurality of times.

Effects of the Invention As described above, the present invention provides a casing equipped with a cleaning member, wherein the casing can be installed in the information signal reproducing device by replacing the signal pickup cartridge of the information signal reproducing device. By configuring the cleaning member to be in contact with the surface of the information recording carrier in a rotating state when the casing is attached to the information signal reproducing device, the cleaning member can avoid damaging the surface of the information recording carrier.
The entire surface of the information recording carrier can be easily and uniformly cleaned, and the degree of contamination of the cleaning member can be checked and replaced very easily.

[Brief explanation of drawings]

FIG. 1 is a side view of an information recording carrier cleaning device according to an embodiment of the present invention, and FIG.
3 is a perspective view of a conventional information recording carrier cleaning device, and FIG. 4 is a side view of FIG. 3. 101... Housing, 102... Rotation drive unit, 10
3... Cleaning member, 105... Slider, 107... Coil spring, 109... Positioning pin, 110... Rotating shaft, 111... Information recording carrier, 112... Transfer table.

Claims (1)

[Scope of Claims] 1. A casing provided with a cleaning member, the front casing being attachable to the information signal reproducing device in exchange for a signal pick-up cartridge of the information signal reproducing device; Information recording, characterized in that the cleaning member is configured to clean the surface of the information recording carrier by coming into contact with the surface of the information recording carrier in a rotating state when the casing is attached to the reproducing device. Carrier cleaning device. 2. The transfer table on which the signal pick-up cartridge is mounted is reciprocated at least once between the outermost circumferential portion and the innermost circumferential portion of the information recording carrier with the casing attached instead of the signal pick-up cart cartridge. 2. The information recording carrier cleaning device according to claim 1, wherein the information recording carrier cleaning device is configured to clean the surface of the information recording carrier by cleaning the surface of the information recording carrier. 3. The information recording carrier cleaning device according to claim 1, wherein the moving speed of the transfer table during cleaning of the information recording carrier is at least faster than the moving speed during normal reproduction. 4. The information recording carrier cleaning device according to claim 1, wherein the cleaning member is attached to a rotational drive unit that rotates by contacting the surface of the information recording carrier in a rotating state.