JPS63206902A - disk cleaning device - Google Patents

Abstract

PURPOSE:To realize the automatic replacement of cleaners at the front operating part and also to perform a cleaning job even at the time of reproduction, by securing such a constitution where only a cleaning means can release its interlocking state from a cleaner shift means and both the cleaning means and a cleaner revolving arm can turn in a body up to the waiting position from the innermost circumference of a disk. CONSTITUTION:A cleaner consisting mainly of a cartridge main body 40 is replaced and inserted from an external housing part and positioned properly by a cartridge guide 70 and a drive rack 27. Under such conditions, the cleaner is turned into a state A from a state D and attracts a cartridge supporting plate 43 at the position A by a magnet. Then a pinion gear 59 engages a double rack part 27b of the rack 27 at the position where a rotary arm 50 touches the main body 40. Thus the arm 50 is turned via an intermediate gear 55 and a cam gear 53 and at the same time the cleaner is also revolved in a body with the arm 50. In such a constitution, the cleaner can be automatically taken out of a front operating part and a cleaning job is possible even at the time of reproduction.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a cleaning device for a recording medium (hereinafter referred to as a disk) on which information signals are recorded concentrically or spirally.

Conventional technology In recent years, video tape recorders (
Following the VTR (hereinafter referred to as VTR), video disc players have become popular, in which a video signal is recorded on a spiral recording line on a disc, which is placed on a turntable, rotated, and a pick-up needle traces the video signal to reproduce the video signal. It is being done.

This is a speed search and random access function.

It has functions such as clear images and sound, and like a VTR, it can be easily used at home using a television. Video disc players currently available on the market include optical and capacitive types. In the latter method, playback is performed by a playback needle that slides into contact with the disc, and the electrode provided on the playback needle is scanned along the recording trajectory of the disc, and the information signal is read as a change in capacitance. Reliable contact with the sliding surface is required. For example, the depth of the irregularities on the signal surface is about several thousand and the width is about 10,000, and the thickness of the electrode sliding surface is about several thousand and the width is about several thousand, so the sliding contact between the signal surface and the electrode is about 10,000. Even if a minute gap occurs between the contact surfaces, it becomes impossible to detect changes in capacitance well. The cause of the gap between the signal surface and the sliding contact surface of the electrode is due to the undulation of the surface of the disk, and the disc material or dust in the air intervening as foreign matter between the signal surface and the sliding contact surface of the reproduction needle. This may be due to a number of factors, but the latter is particularly large.

Therefore, a cleaning device has been proposed that cleans the disk surface in order to maintain uniform contact between the disk and the playback needle.

An example of the conventional disk cleaning device mentioned above will be described below with reference to the drawings.

FIGS. 6 and 7 show the mounting and operating conditions of a conventional disk cleaning device. In FIGS. 6 and 7, a part of the cleaning member 15 provided in the rotation drive unit 14 of the cleaner 13 is in contact with the surface of the disk 1o rotating in the direction of arrow d. As shown in FIG. 7, this cleaner 13 is attached to the surface of the disk 10 in such a manner that the central axis of rotation of the rotary drive unit 14 is inclined at a predetermined angle with respect to the perpendicular direction. Further, the cleaner 13 is attached to a transfer stage (not shown) for the signal pickup cartridge, the rotary drive unit 14 is moved up and down by a changeover switch, and the cleaning member 15 is attached to the transfer table (not shown) of the signal pickup cartridge.
It is configured so that it can be switched between contact and non-contact as necessary.

The operation of the conventional disk cleaning apparatus constructed as described above will be explained below.

When a part of the cleaning member 16 comes into contact with the disc 1o rotated by the turntable motor, a frictional force is generated between the two, the rotation drive unit 14 rotates, and the rotation of the cleaning member 16 causes the rotation of the cleaning member 16 to reach the outermost periphery of the disc 10. This is to remove foreign substances such as dust and powder from the disk that adhere to the disk 1o by being transferred from the disk to the innermost circumference (for example, see Japanese Patent Laid-Open No. 61-54004).

Problems to be Solved by the Invention However, with the above configuration, it is very difficult to check the degree of contamination of the beam IJ-Jung member and to replace it, and the player is generally stored in a rack and only the front operation section can be operated. Therefore, even if the cleaning member is replaceable, it is necessary to take the player out of the rack, remove the case, and replace the player, which poses many practical problems. However, as mentioned above, if dust adheres to a disc, the image will be disturbed and it will be necessary to clean the disc immediately, so there has been a desire to develop a method that can clean the disc while it is being played. Also.

The cartridge-type cleaner is exchanged from the front operation part, and the cartridge holder, which protects and positions the cartridge, is disengaged from the positioned cleaner and only the cleaner is carried onto the disk surface. A means was needed.

The present invention solves the above-mentioned problems, and provides a cartridge-type cleaner that allows for easy replacement of the cleaner, and a cartridge-type cleaner that allows for easy replacement of the cleaner, as well as a cleaner that can be replaced automatically from the front operation section and cleaning at the same time during regeneration. The present invention provides a disk cleaning device that performs a cleaning operation by transferring only a cleaner onto a disk surface from a transfer table that projects from the disk surface.

Means for Solving the Problems In order to solve the above conventional problems, the disk cleaning device of the present invention includes a disk on which a signal is recorded, a rotating means for rotating the disk, and a surface of the disk in a rotating state. a cleaner rotating arm that rotates from the innermost circumference of the disk to a standby position and engages with the cleaning means;
The cleaning device is composed of a cleaner transporting means for linearly transporting the cleaning means to the outside of the apparatus, a first driving means for driving the cleaner rotation arm, and a second driving means for driving the cleaner transporting means. Only the cleaning means can be disengaged from the cleaner transfer means, and the cleaner rotating arm and the cleaning means rotate integrally from the innermost peripheral portion to the standby position. The cleaner rotating arm is equipped with a mounting member such as a magnet, and the cleaning means is mounted by the mounting member in the standby position, and the cleaning device is disengaged from the IJ-ner transfer means. be.

Effect of the Invention With the above-described structure, the present invention allows the cleaning member to be taken out from the front operating section so that it can be easily replaced, so there is no need to open the top of the player even if the player is set in the rack. Also, this removal is done automatically, but the cleaning member and its transfer table protrude as one from the front operation section, and after replacing the cleaning member, they move together to a predetermined position, and only the cleaning member is transferred onto the disk. Since it is a moving mechanism, a stable method of holding the cleaning member can be obtained. That is, the cleaning member makes a separate movement from the middle of the transfer table, and is lightened and carries only the cleaning member onto the disk surface.

Embodiment Hereinafter, a disk cleaning device according to an embodiment of the present invention will be described with reference to the drawings.

Fig. 1 is a plan view sb showing the layout and part of the operation of a disc player equipped with a disc cleaning mechanism according to an embodiment of the present invention, Fig. 2 is a front sectional view of the main part thereof, and Fig. 3 a is its plan view. Side view, b shows a partial operational view of the side view. FIGS. 4a and 4b and 6a and 6b are plan views showing the cleaning member during transfer and in a standby position, respectively.

FIG.

First, to explain the outline of a disc player, as shown in Fig. 1, the playback device main body 2o includes a chassis 21, an insertion slot 22 into which a disc is inserted, a motor 23 which is a rotating means for rotating the disc, and a disc 24 mounted thereon. It consists of a rotating turntable 25, other playback systems (not shown), and a disk cleaning mechanism (first fixed part). A sub-frame 26 is located on the left side of the chassis 21, which faces a specific side on which a pickup (not shown) constituting a reproduction system is provided, across the turntable, and holds a disk cleaning mechanism. A rail 28 is fixed to the subframe 26 so that a drive rack 27, which is a cleaner transport means, can slide thereon. Drive rack 2
7 is outsert-molded on the sheet metal 271L and is attached to the rail 28 and the claw portion 270 so as to be slidable. Further, the drive rack 27 is engaged with a drive gear 29 that is a second drive means that rotates around a support shaft 3o fixed to the sub-chassis 26. A worm 32 is press-fitted into the rank drive motor 31, and the rack drive motor 31 is fixed to a motor fitting 33. The motor fitting 33 is rotatable around a support shaft 34 provided on the sub-shear 726, and is fixed with screws 35 so that the drive gear 29 and the worm 32 are engaged with each other in a pitch circle. Drive rack 27
If you want to move it manually, you can do so by loosening the screw 35 and releasing the engagement between the drive gear 29 and the worm 32.

A cleaner, which is a means for cleaning the disk 24, is provided in the cartridge body 40. A leaf spring 41 attached to the cartridge body 4o. It is comprised of a cleaner part 42 rotatably attached to a leaf spring 41, a cartridge support plate 43 made of iron-based metal, and the like. The cleaner is rotatable to the innermost circumference of the disk 24, and a cartridge holder 51 is fixed to the rotating arm (2) that brings the cleaner into contact with the disk surface, and a magnet 101 is integrally attached to the cartridge holder 61. A holding member 1oo is provided, and it is possible for the mounting member 1oO to hold only the cartridge main body 40 and rotate it to the innermost circumference of the disk.

The aforementioned rotating arm 50 is rotatable around a support shaft 52,
It is constructed integrally with a cam gear 63 that is rotatable around a support shaft 62. The cam 53 is integrally molded with a gear portion 53a, and the gear portion 63& is an intermediate gear 6 which is a first driving means and rotates around a support shaft 64 fixed to the sub-chassis 26.
It meshes with 6. In addition, the sub-chassis 26 has a support shaft 6.
6 is fixed, and the base 57 is rotatable around a support shaft 56.
is retained. A gear 58 is fixed to the base 6, and a pinion gear 69 is rotatably attached. The pinion gear 59 and the intermediate gear 65 are normally urged by a spring 60 so as to mesh with each other at a pitch circle. On the other hand, the pinion gear 59 and the aforementioned drive rack 27 are connected to the drive rack 2
The mesh is engaged or disengaged depending on the position 7. The double rack portion 27b of the drive rack 27 is configured to mesh with each other. Therefore, when the double rack portion 27b and the pinion gear 69 are engaged, the cam gear 53 rotates via the intermediate gear 64, and the rotating arm 50 rotates.

When the rotating arm 6o rotates to the innermost circumference of the disk, the drive rack 27 is moved backward to section B in FIG. Detection of the outermost circumference and innermost circumference of the disk of the rotating arm 6o is as follows:
The curved portions 53b of the cam gear 53 are respectively connected to the switches 62.
Detection is performed by turning on the switch 63. A switch 64 for detecting the standby position of the drive rack 27 is fixed to the sub-chassis 26. Cam gear 63, switch 62. The switches 63 are each attached to the subframe 26. On the other hand, the drive rack 27 moves integrally with the cartridge guide 70, and moves the cleaner centered on the cartridge body 4o between the claw portion 70a and the drive rack 27.
It is held by the claw part 2C (not shown). Note that the drive rack 27 and the cartridge guide 7o are biased by a spring 71 so as to attract each other.

The operation of the disk cleaning device configured as described above will be explained below.

The drive rack 27 is in a standby position where it is stopped by the switch 64 and holds the person (shown in Figure 3) and the cleaner. There are four states: the outermost peripheral part C (the drive rack 27 is not shown, the rotating arm 6o is in the C state), and the cleaner is protruded from the exterior part D (shown in Figure 3, the cartridge guide is in the H state). , the drive rack 27 is continuously engaged with the drive gear 29 in the state from B to D, and can move in a straight line. The switches 64. to 64 detect the states of M to D, respectively. They are switch 63, switch 62, and switch 64.

First, when the cleaner centered on the cartridge body 4o is replaced and inserted from the exterior part, the cartridge body 4o
The cleaner centered at o is positioned by the cartridge guide To and the drive rack 27 and moves from the D state to the ON state using the rack drive motor 31 as a drive source. At the human position, the cleaner pulls the cartridge support plate 43 using the magnet 101 provided on the mounting member 100. FIG. 5 shows the transition from D to the ON state. Thereafter, the pinion gear 59 and the double rack portion 27b of the drive rack 27 engage from the position where the rotation arm 50 and the cartridge body 4o come into contact, so the drive rack 27 changes from the engaged state to the C state (rotation arm 60G state). The transition changes. At this time, the rotating arm 6o can rotate via the intermediate gear 66 and the cam gear 53. At the same time, the cleaner also rotates as a unit. That is, the linear motion of the drive rack 27 is converted into a rotational motion of the rotating arm 6o, and at this time, the mounting member 10o and the cartridge support plate 43 are brought into contact so that only the cleaner rotates. Further, when the tips of the teeth of the drive rack 27 and the pinion gear 69 come into contact with each other, they escape because the pinion gear 59 is biased by the spring eO.

The period from the C state to the B state (from G to F for the rotating arm 50) is from the outermost circumference to the innermost circumference of the disk 24, and the switch 62.
By changing the position of the switch 63, discs of various diameters can be accommodated. The repeated cleaning operation of G-F can be set in advance from once to any number of times. After the disk cleaning operation is completed, drive rack 2 again.
7 returns to the on state (rotating arm 50H state). When replacing the cleaner, remove the mounting member 100 and cartridge support plate 43.
The cartridge guide 7o is moved away from the drive rack 2.
7. As described above, in this embodiment, the rotation of the rotation arm 5o and the linear movement of the drive rack 27 and cartridge guide 70 are driven by the rack drive motor 31 alone, and a solenoid for switching between linear and rotation is also used. However, the rotational movement may be achieved using another drive source.

In other words, two motors may be used.

As described above, according to this embodiment, the disk-shaped disk 24 on which signals are recorded, the motor 23 which is a rotating means for rotating the disk 24, and the disk 24 are cleaned by contacting the surface of the rotating disk 24. a cleaner rotating arm that rotates from the innermost circumference of the disk 24 to a standby position; and a cleaner transfer means that engages with the disk cleaning mechanism and linearly transfers the disk cleaning mechanism to the outside of the apparatus. and a first driving means for driving the cleaner rotating arm, and a second driving means for driving the cleaner transporting means, and the cleaning means is disengaged from the cleaner transporting means, and the cleaning means is disengaged from the cleaner transporting means. By configuring the cleaner rotating arm and the cleaning means to integrally rotate from the innermost peripheral portion to the standby position, the cleaner can be replaced automatically from the front operation section, To provide a disk cleaning device having an easy structure in which only a cleaner is carried onto a disk surface.

Effects of the Invention As described above, according to the present invention, the cleaner can be automatically taken out from the front operation section even when the player body is stored in the player rack, and cleaning can be performed simultaneously during playback. Also, this cleaner
In order to make it replaceable, it is transferred integrally with a transfer table that protrudes outside, but from a certain position (standby position) only the cleaner is moved onto the disk surface, making it possible to hold the cleaner in a stable manner. It is lightweight and compact, so you only need to hold and rotate the leaner, and the rotating arm also operates stably. Furthermore, when replacing the cleaner, the transfer table and the cleaner move as one unit, and the mechanism is simple, making it possible to provide an extremely easy-to-use cleaning device that requires frequent replacement of the cleaner. .

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the layout and partial operation of a disk cleaning device according to an embodiment of the present invention, and FIG.
Figure 3 is a front sectional view of the main part, Figure 3 & is a partial side sectional view, Figure 3 is a side sectional view showing a part of the operation, Figure 4 a,
Fig. 5a is a plan view showing the cleaning member (cleaner) during transfer and in the standby position, Figs. 4 and 5 show the same side, and Figs. 6 and 7 show the conventional cleaner. FIG. 2 is a perspective view and a partial side sectional view. 24... Disc, 27... Drive rack, 29... Drive gear, 31... Drive motor, 32... Worm, 40...・・・・・・
・Cartridge body, 42... Part of the cleaner,
43... Cartridge support plate, 6°...
・Rotating arm, 61...Cartridge holder, 63...Cam gear, 66...Intermediate gear, 59...Binion gear, 100...
- Mounting member, 101... Magnet. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 6
Figure 7 (:t /Q

Claims (2)

[Claims] (1) A disk cleaning device comprising a disk on which a signal is recorded, a rotating means for rotating the disk, and a cleaning means for cleaning the disk by contacting the surface of the disk in a rotating state, A cleaner rotating arm that rotates from the innermost peripheral portion to a standby position, a cleaner transporting unit that engages with the cleaning means and linearly transports the cleaning means to outside the apparatus, and drives the cleaner rotating arm. comprising a first driving means and a second driving means for driving the cleaner transporting means,
A disk cleaning device in which only the cleaning means can be disengaged from the cleaner transfer means, and the cleaner rotating arm and the cleaning means rotate integrally from the innermost circumference of the disk to the standby position. (2) A patent characterized in that the cleaner rotation arm is equipped with a mounting member such as a magnet, and in a standby position, the cleaning means is mounted by the mounting member and disengaged from the cleaner transfer means. A disk cleaning device according to claim 1.