JPH0777001B2 - Disk cleaning device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning device for a recording medium (hereinafter referred to as a disk) in which an information signal is recorded concentrically or spirally.

2. Description of the Related Art In recent years, a video signal has been recorded on a spiral recording line of a disk following a VTR as an image and sound reproducing device, which is placed on a turntable and rotated to trace a pick-up needle to record a video. Video disc players that reproduce signals are becoming popular. It has functions such as speed search, random access function, clear image and sound, and it can be easily handled by using TV in ordinary households as well as VTR. Video disc players currently on the market include optical and capacitive type. The latter is a system in which reproduction is performed by a reproducing needle that is in sliding contact with the disc, the electrodes provided on the reproducing needle are scanned along the recording track of the disc, and the information signal is read as a change in electrostatic capacity. The close contact with the sliding contact surface is required. For example, the depth of irregularities on the signal surface is several thousand Å, the width is about 10,000 Å, the thickness of the sliding surface of the electrode is several thousand Å, and the width is about several thousand Å. Even if a minute gap is generated between the contact surfaces, it becomes impossible to detect the change in the capacitance satisfactorily. The cause of the gap between the signal surface and the sliding contact of the electrode is due to the undulation of the surface of the disk, and that the disk material and dust in the air intervene between the signal surface and the sliding contact surface of the playback needle as foreign matter. However, the latter ratio is particularly large.

Therefore, a cleaning device has been proposed that cleans the surface of the disk to keep the contact state between the disk and the reproducing needle uniform.

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

4 and 5 show the mounting state and operating state of the conventional disk cleaning device. In FIGS. 4 and 5, the surface of the disk 10 rotating in the direction of the arrow d is in contact with a part of the cleaning member 15 provided in the rotary drive unit 14 of the cleaner 13. This cleaner 13 is 5th
As shown in the figure, the disk 10 is mounted on the surface of the disk 10 in a state where the central axis of rotation of the rotary drive unit 14 is inclined at a predetermined angle with respect to the vertical direction. Further, the cleaner 13 is attached to a transfer table (not shown) of the signal pickup cartridge, the rotation driving unit 14 is moved up and down by a changeover switch, and the cleaning member 15 can be switched between contact and noncontact with the disk 10 as needed. Is configured.

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

When a part of the cleaning member 15 is brought into contact with the disk 10 rotated by the turntable motor, a frictional force is generated between the two, the rotation driving unit 14 rotates, and the cleaning member 15 rotates from the outermost periphery of the disk 10. The foreign matter such as dust and disk powder adhered to the disk 10 by being transferred to the innermost circumference is removed (for example, Japanese Patent Laid-Open No. 61-
54004 gazette).

Problems to be Solved by the Invention However, with the above configuration, it is very difficult to check and replace the degree of contamination of the cleaning member, and since the player is generally housed in the rack and can operate only the front operation unit in many cases, Even if the cleaning member had a replaceable structure, the player had to be taken out of the rack, the case removed, and the player replaced, which had many practical problems. Further, as described above, when dust adheres to the disc, the image is disturbed and it is necessary to immediately clean the disc. Therefore, it has been desired to develop a method capable of cleaning while reproducing.

In view of the above problems, the present invention provides a disk cleaning device that further improves the conventional cleaning method in which the cleaner can be easily replaced from the front operation section and can be cleaned simultaneously during reproduction.

Means for Solving the Problems In order to solve the above problems, a disk cleaning device of the present invention is 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. And a cleaning means for cleaning the disk, and is capable of reciprocating from the outermost peripheral portion to the innermost peripheral portion of the disk, and rotates while holding the cleaning means from the innermost peripheral portion to the standby position of the cleaning means. Cleaner rotation means, a cleaner transfer means for linearly transferring the cleaning means to the outside of the apparatus, and a drive means for driving the cleaner rotation means and the cleaner transfer means. .

Action According to the present invention, since the cleaning member can be taken out from the operation unit so that the cleaning member can be easily exchanged, it is not necessary to open the player upwards even when the player is set in the rack. Further, since the cleaning is different from the transfer source of the reproducing needle, it is possible to perform the cleaning at the same time during the reproduction of the disc. In addition, the removal of the cleaning member and the cleaning operation of the cleaning member are performed by one driving body (motor), and it is not necessary to switch the solenoid etc., which is extremely high in mass productivity in consideration of cost reduction and has a commercial value. This is a high-performance disc cleaning device.

Embodiment A disk cleaning device according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view showing a layout and a part of the operation of a disc player provided with a disc cleaning mechanism in an embodiment of the present invention, FIG. 2 is a front sectional view of an essential part thereof, and FIG. Side sectional view, b shows a side sectional view of a main part.

First, the outline of the disc player will be described. As shown in FIG. 1, the reproducing device main body 20 has a chassis 21, an insertion slot 22 for inserting the disc, a motor 23 as a rotating means for rotating the disc, and a disc 24. It comprises a turntable 25 which is rotated by means of other components, a reproduction system (not shown), and a disk cleaning mechanism (left part in FIG. 1). A chassis 21 that faces the right side of the drawing, which is provided with a pickup (not shown) that constitutes the reproduction system, with the turntable in between.
There is a sub-frame 26 to the left of, which holds the disk cleaning mechanism. Drive rack 27 on subframe 26
The rail 28 is fixed so that can slide. The drive rack 27 is outsert molded to the sheet metal 27a, and the rail 2
It is attached slidably by 8 and the claw portion 27c. The drive rack 27 meshes with a drive gear 29 that rotates around a support shaft 30 fixed to the subframe 26. The worm 32 is press-fitted into the rack drive motor 31, and the rack drive motor 31 is fixed to the motor fitting 33. The motor fitting 33 is rotatable about a support shaft 34 provided in the sub chassis 26, and is fixed by a screw 35 so that the drive gear 29 and the worm 32 are engaged with each other at a pitch circle. Drive rack
When moving the 27 manually, it is possible to loosen the screw 35 and release the engagement between the drive gear 29 and the worm 32. A cleaner, which is means for cleaning the disk 24, is composed of a cartridge body 40, a leaf spring 41 attached to the cartridge body 40, a cleaner portion 42 rotatably attached to the leaf spring 41, a cartridge support plate 43, and the like. The cleaner is rotatable up to the innermost circumference of the disk 24, and the cartridge holder 51 is fixed to the rotating arm 50 that brings the cleaner into contact with the disk surface, and the cartridge body 40 is held up to the innermost circumference of the disk. Is possible.

The rotating arm 50 is rotatable about a support shaft 52,
It is configured integrally with a cam gear 53 that is rotatable around 52. A gear portion 53a is integrally formed with the cam gear 53,
The gear portion 53a meshes with an intermediate gear 55 that rotates around a support shaft 54 fixed to the subframe 26. A support shaft 56 is fixed to the sub-frame 26, and a base 57 is held rotatably around the support shaft 56. A gear shaft 58 is fixed to the base 57, and a pinion gear 59 is rotatably attached to the base 57. The pinion gear 59 and the intermediate gear 55 are normally biased by a spring 60 so as to mesh with each other in a pitch circle. On the other hand, the pinion gear 59 and the above-mentioned drive rack 27 are configured to engage with each other or release the engagement depending on the position of the drive rack 27, and to engage with each other in the double rack portion 27b of the drive rack 27. Therefore, when the double rack portion 27b and the pinion gear 59 engage with each other, the cam gear 53 rotates via the intermediate gear 55, and the rotating arm 50 rotates. When the rotating arm 50 rotates to the innermost circumference of the disc, the drive rack 27 is in the state of moving backward to the portion B in FIG. The detection of the outermost circumference and the innermost circumference of the disc of the rotating arm 50 is performed by the curved portion 53b of the cam gear 53 turning on the switch 62 and the switch 63, respectively. Switch that detects the standby position of drive rack 27
64 is fixed to the subframe 26. The cam gear 53, the switch 62, and the switch 63 are attached to the subframe 26, respectively. On the other hand, the drive rack 27 moves integrally with the cartridge guard 70, and the cleaner centering on the cartridge body 40 is used as a tab 70a and a tab 27c of the drive rack 27.
It is held by (not shown). The drive rack 27 and the cartridge guide 70 are urged by a spring 71 so as to attract each other.

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

Drive rack 27 is stopped by switch 64 in standby position A
(Illustrated in FIG. 3b) and the innermost disk portion B of the rotary arm 50 holding the cleaner (the rotary arm 50 is in the F state).
And the outermost portion C of the disc (the drive rack 27 is not shown, the rotating arm 50 is in the G state) and the cleaner is projected from the exterior portion D (shown in FIG. 3b, and the cartridge guide 70 is H).
There are four states (states), and the drive rack 27 can be moved linearly by engaging with the drive gear 29 from state B to state D. A switch 64, a switch 63, a switch 62, and a switch 64 detect the states of A to D, respectively. First, when the cleaner centering on the cartridge body 40 is replaced and inserted from the exterior, the cartridge guide 70 and the drive rack 27 move from the D state to the A state using the rack drive motor 31 as a drive source. Then the rotating arm
Since the pinion gear 59 and the double rack portion 27b of the drive rack 27 are engaged with each other from the position where the 50 and the cartridge main body 40 are in contact with each other, the drive rack 27 changes from the A state to the C state (rotating arm 50G).
State). At this time, the rotating arm 50 is an intermediate gear.
It can be rotated via 55 and cam gear 53. That is, the linear motion of the drive rack 27 is changed to the rotary motion of the rotary arm 50. When the tooth tips of the drive rack 27 and the pinion gear 59 hit each other, the pinion gear 59 is urged by the spring 60 and escapes. C state to B
During the state (the rotation arm 50 is from G to F), the disk 24 is from the outermost circumference to the innermost circumference, and by changing the positions of the switches 62 and 63, disks of various diameters can be dealt with. G ~
The repeated cleaning operation of F can be set in advance from once to any number of times. After the disk cleaning operation is completed, the drive rack 27 is again in the A state (rotating arm
Return to 50H state). As described above, the rotation of the rotating arm 50 and the linear movement of the drive rack 27 and the cartridge guide 70 are the drive sources of the rack drive motor 31 alone, and the solenoid for switching between linear and rotation is not used.

As described above, according to the present embodiment, the disk (disk) 24 on which the signal is recorded, the rotation means configured by the motor 23 for rotating the disk 24, and the surface of the disk 24 in the rotating state are in contact with each other. Cartridge body 40 for cleaning the disk 24,
A disk cleaning device comprising a leaf spring 41, a cleaner portion 42, a cleaning means such as a cartridge support plate 43, and the like, which is capable of reciprocating from the outermost peripheral portion to the innermost peripheral portion of the disk 24, and from the innermost peripheral portion to the above. A rotating arm 50, a cartridge holder 51, a cam gear 53, which rotates while holding the cleaning means to the standby position of the cleaning means,
Cleaner rotation means such as intermediate gear 55, base 57, pinion gear 59, and cleaner such as drive rack 27, rail 27, drive gear 29, worm 32, cartridge guide 70 for linearly transferring the cleaning means to the outside of the apparatus. By comprising the transfer means and the drive means including the rotation of the cleaner rotation means and the motor 31 for driving the transfer of the cleaner transfer means, the cleaner can be easily replaced from the front operation portion and the cleaner is being regenerated. It can be cleaned at the same time, which is an improvement over the conventional cleaning method. Further, the drive means has one drive body, and is configured such that the rotation of the cleaner rotation means and the transfer of the cleaner transfer means are driven by the one drive body without switching, and a solenoid or the like is used. It realizes a significant cost reduction without doing so. In the embodiment, when the disk diameter is constant, the turning angle of the turning arm 50 is switched.
Although it is detected only by the switch 62 and the switch 63, the innermost peripheral portion and the outermost peripheral portion of the disc can be detected according to the discs of various diameters, which is applicable to discs of various diameters. Therefore, it is a cleaning device that can be put to practical use other than the electrostatic capacity type disc player.

As described above, according to the present invention, even when the player main body is housed in the player rack, the cleaning cartridge can be easily taken out from the front panel portion, and even when dust is generated during disc reproduction. It provides a structure that can be cleaned at the same time as regeneration. Further, the cleaning operation and the cleaning cartridge take-out operation can be performed without the use of a single drive motor and a switching means such as a solenoid, so that it is possible to provide a player with extremely low mass production and high mass productivity. Therefore, even if a temperature difference occurs during disc reproduction and a dew phenomenon occurs, the disc can be cleaned during reproduction.

[Brief description of drawings]

FIG. 1 is a plan view showing a layout and a partial operation of a disk cleaning device according to an embodiment of the present invention.
The figure is a front sectional view of an essential part thereof, FIG. 3a is a partial side sectional view of the same, and FIG. 3b is a side sectional view of an essential part showing a partial operation, and FIG.
FIG. 5 and FIG. 5 are a perspective view and a partial side sectional view showing a configuration of a conventional cleaning device. 24 …… Disk, 27 …… Drive rack, 29 …… Drive gear,
31 …… Drive motor, 32 …… Worm, 40 …… Cartridge body, 42 …… Cleaner part, 50 …… Rotating arm, 51…
… Cartridge holder, 53 …… Cam gear, 55 …… Intermediate gear, 59 …… Pinion gear.

Claims (3)

[Claims] 1. A disk having a signal recorded thereon, a rotating means for rotating the disk, and a cleaning means for contacting the surface of the disk in a rotating state to clean the disk, the outermost peripheral portion of the disk. From the innermost peripheral portion to a standby position of the cleaning means, the cleaner rotating means rotating while holding the cleaning means, and the cleaning means linearly transferred to the outside of the apparatus. A disk cleaning device comprising: a cleaner transfer means for rotating the cleaner; and a drive means for driving the cleaner rotating means and the cleaner transferring means. 2. The driving means has one driving body, and the rotation of the cleaner rotation means and the movement of the cleaner transfer means are controlled by the above-mentioned one.
The disk cleaning apparatus according to claim 1, wherein the disk cleaning apparatus is configured to be driven by one driving body without switching. 3. The cleaner rotation means is engaged with a transmission member for converting the linear movement of the cleaner transfer means into a rotation direction, and the cleaner rotation means is moved through the transmission member by the movement of the cleaner transfer means. The disk cleaning device according to claim 1, wherein the disk cleaning device is configured to rotate.