JPH0632197B2 - Disk Cleaner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention is a disk cleaner that effectively wipes dust, fingerprints, and other dirt adhering to, for example, a digital audio disk (product name compact disk), an optical disk, and the like. Regarding

[Conventional technology]

For example, as a method of cleaning a digital audio disk, wiping in the circumferential direction is taboo, and wiping in the radial direction is the correct cleaning method. This is because the pits engraved on the disk are elliptical and lined up in a circular shape, and even if the surface is scratched and wiped in the radial direction, the pits cross the pits, so there is little effect. This is because wiping in the circumferential direction is likely to damage the pits in the form of vertical cuts, which may cause signal loss and may damage adjacent pits at once.

Based on the above idea, a disk cleaner in which the disk surface is wiped in the radial direction has been previously proposed. For example, as shown in FIG. 8, an internal gear 40 and a planetary gear 4 that revolves along the inner surface of the gear 40 while revolving.
The ring-shaped cleaning pad 22 is fixed to the planetary gear 41, and the arbitrary point on the pad 22 draws a petal-shaped locus P while the surface of the stationary disk 3 is formed. There are things I wiped off. (Japanese Utility Model Publication No. 60-116604). Reference numeral 43 in the drawing denotes a drive gear that applies a rotational force to the planet gear 41, and this gear 43 is manually rotated.

Further, as shown in FIG. 9, the disc 3 and the cleaning pad 2 are
2 are arranged so that their respective radial regions are vertically overlapped with each other, and the two are rotated in opposite directions to each other so that the pad 22
There is one in which the locus P of an arbitrary point above is set so as to draw a gentle curve from one peripheral edge of the disk 3 toward one peripheral edge substantially opposite thereto (JP-A-60-234).
276 publication). In this case, gear teeth 45 are formed on the peripheral surface of the turntable 44 on which the disk 3 is placed, and the gear teeth 45 are meshed with the driving small diameter gear 46 provided at the center of the cleaning pad 22. There is.

In addition to the above, disk cleaners of the same kind as the disk cleaner illustrated in FIG. 8 are known in Japanese Utility Model Publication No. 61-13389 and Japanese Utility Model Publication No. 61-40792. In these devices, a planetary gear provided on the cleaner body is meshed with an internal gear, and the surface of the disk that is stationary on the table is wiped off by the cleaner body along a circulation path.

[Problems to be solved by the invention]

As described above, the trajectory P of the cleaning pad 22 is required to follow the radial direction of the disc 3 as much as possible in order to protect the disc 3. On the other hand, when the locus P is drawn from one side edge of the disk 3 to the other side edge substantially opposite thereto as shown in FIG. 9, the loss of a signal due to a scratch on the cleaning pad 22 can be well prevented. It is advantageous. However, for that purpose, it is necessary to make the rotation radius of the cleaning pad 22 sufficiently large. Then, as shown in the figure, most of the cleaning pad 22 largely protrudes from the outline of the disk 3, so that the disk cleaner as a whole. Becomes larger.

In the case where the attitude of the cleaning pad 22 is controlled by using the cycloid mechanism as shown in FIG. 8, the entire cleaning mechanism is accommodated within the outline of the disk 3, so that the disk cleaner can be made compact as a whole. it can. On the other hand, since the rotation cycle of the cleaning pad 22 is extremely longer than the revolution cycle, there are many locus components along the circumferential direction of the disk 3, which is likely to cause a problem if a scratch is formed. This is because the cleaning pad 22 is in the radial region of the disk 3 and the rotation center of the planetary gear 41 is substantially in the center of the disk 3 in the radial direction. Therefore, the gear ratio between the internal gear 40 and the planetary gear 41 is changed. Due to restrictions such as being unable to be smaller than a certain level. That is, the attitude of the cleaning pad 22 is controlled by using the internal gear type cycloid mechanism, and there is a limit in obtaining a suitable pad trajectory. Incidentally, if the number of teeth of the planetary gear 41 is increased, the gear ratio is reduced, but the number of teeth of the internal gear 40 is also increased accordingly, and the rotation cycle cannot be reduced so much.

A disk cleaner that circulates the cleaner body by meshing of an internal gear and a planetary gear provided on the cleaner body (Japanese Utility Model Publication No. 61-13389 and Japanese Utility Model Publication No. 61-407).
No. 92 publication), the cleaner body must be rotated along the internal gear while being pressed against the internal gear.
It is difficult to use because it is necessary to continuously change the direction of the force applied to the cleaner body. The planetary gear and the internal gear may disengage from each other during rotation, causing the cleaner body to move along the circumferential direction of the disk.

The present invention solves the above problems and provides a disk cleaner capable of reliably preventing signal loss due to scratches on a cleaning pad, and being compact in size and capable of achieving miniaturization. Is the main purpose.

[Means for solving problems]

The disc cleaner of the present invention includes a main body case 1 having a disc mounting surface 2, a cover 5 that covers the upper surface of the disc mounting surface 2 so as to be openable and closable, and a cleaning body 4 supported on the inner surface of the cover 5.

The cleaning body 4 revolves around an orbital center O coinciding with the center of the disc, but rotates about its own axis to wipe the surface of the disc 3 resting on the disc mounting surface 2 along a circulation path.

In the closed state, the drive gear 14 for rotating the cleaning body 4 and the cleaning body 4 are rotatably supported at the revolution center O positions of the disk mounting surface 2 and the inner surface of the cover 5 which face each other vertically. A support arm 29 rotatably supported around the revolution center O is provided.

An input gear 30 that meshes with the drive gear 14 is provided on the peripheral surface of the cleaning body 4 with the cover 5 closed.

An attitude control mechanism 25 for revolving the cleaning body 4 by the rotation of the cleaning body 4 is provided on the cover 5 side.

The attitude control mechanism 25 includes a sun gear 26 that is non-rotatably fixed at the position of the revolution center O, and a planetary gear 27 that is located at the center of rotation and rotates together with the cleaning body 4.

The sun gear 26 and the planetary gear 27 are meshed and coupled so that the cleaning body 4 receives the meshing reaction force of the sun gear 26 and revolves in the direction opposite to the rotation direction.

The locus P of each rotation cycle of the cleaning pad 22 is the disc 3
When the starting point Q is one peripheral edge of the disk 3, the rotation cycle and the revolution cycle are set so that the end point R is located at one peripheral edge of the disk 3 that is substantially opposite to the starting point Q.

Specifically, a diameter line orthogonal to the diameter line of the disk 3 passing through the starting point Q is defined as a limit line S, and an end point R of the locus P is located at one peripheral edge of the disk 3 facing the starting point Q across the limit line S.
Position.

Set the rotation period for one revolution period to a decimal value.

The sun gear 26 fixed to the revolution center O, the planetary gear 27 fixed to the rotation center of the cleaning body 4, and both gears 26, 27.
The attitude control mechanism 25 is configured to include the timing belt 28 wound around the.

[Action]

In the use state, the cleaning body 4 which receives the power of the drive gear 14 rotates on its axis. With this rotation operation, the planetary gear 27 rotates together with the cleaning body 4. The planetary gear 27 is meshed with the non-rotatable sun gear 26 via, for example, a timing belt 28 or an intermediate gear. Therefore, at the same time when the cleaning body 4 rotates, the planetary gear 27 becomes the sun gear 2.
Receives meshing reaction force of 6. The cleaning body 4 revolves due to this meshing reaction force. Therefore, if the rotation cycle and the revolution cycle are appropriately selected, most of the wiping locus at any one point of the cleaning body 4 can be along the radial line of the disk 3.

Since almost all of the movement trajectory of the cleaning body 4 is within the outer line of the disc 3, the disc cleaner can be made smaller.

〔Example〕

1 to 5 show an embodiment in which the present invention is applied to a disc cleaner for a digital audio disc.

2 and 3, the disc cleaner mounts the disc 3 on the disc mounting surface 2 provided on the upper surface of the main body case 1, the disc 3 is kept stationary, and the upper surface is cleaned by the cleaning body 4. Wipe away. The cleaning body 4 is supported on the inner surface of a cover 5 that covers the entire top surface of the main body 1, and is driven to rotate by a drive mechanism 6 provided in the main body case 1 only when the cover 5 is closed.

The main body case 1 is composed of an upper case 1a and a lower case 1b.
A rubber mat 7 with a diameter slightly smaller than that of the disc 3 on its surface
Is laying. A chamber 10 for accommodating the battery 8 and the motor 9 is defined at the rear end of the main body 1 so as to project above the disc mounting surface 2.

The drive mechanism 6 is provided between the drive gear 14 and the motor 9, which project upward from the center of the disc mounting surface 2, and the power of the motor 9 is supplied to the worm 15 and the worm gear 1.
6. Transmission to the drive gear 14 via the timing belt 17 in order. The drive gear 14 is rotatably supported by a boss on the inner surface of the lower case 1b via a pin 18.

The cleaning body 4 includes a disc-shaped pad base 20, a circular holder 21 supported on the lower surface of the pad base 20 so as to be vertically movable, and four cleaning pads 22 annularly arranged on the lower surface of the holder 21. Consists of. A coil spring 24 is interposed between the holder 21 and the pad base 20, and the spring 24 constantly pushes the holder 21 downward to bias it. The cleaning pad 22 is detachably fixed to the holder 21 so as to be replaceable.

An attitude control mechanism 25 is provided between the pad base 20 and the cover 5 so that each cleaning pad 22 can move in a radial contact with the disk 3 in a substantially radial direction. This mechanism 25 includes a sun gear 26 fixed to the inner surface of the cover 5, a planetary gear 27 protrudingly formed at the center of the upper surface of the pad base 20, and both gears in order to shorten the rotation cycle of the cleaning body 4. The timing belt 28, which is wound around 26/27, and the cleaning body 4 as a whole are provided with the sun gear 26.
It comprises a support arm 29 for locus restraint which is rotatably supported around the center of the circle, that is, the revolution center O. The revolution center O is located on the center line of the disk 3 with the cover 5 closed. The attitude control mechanism 25 is the same as the drive mechanism 6 described above.
It is driven by the drive gear 14 of. Therefore, the input gear 30 is formed on the peripheral surface of the pad base 20, and the cover 5
The input gear 30 meshes with the drive gear 14 when is closed. The gear ratio between the drive gear 14 and the input gear 30 is set to 1:10. The gear ratio between the planet gear 27 and the sun gear 26 is set to 1: 2.4.

In FIG. 2, when the drive gear 14 is driven in the counterclockwise direction, the cleaning body 4 rotates in the clockwise direction. Further, the planetary gear 27 integrated with the pad base 20 also rotates in the clockwise direction to move the cleaning body 4 in the counterclockwise direction while relatively rotating the timing belt 28. That is, the cleaning body 4 has the rotation direction and the revolution direction opposite to each other.

In the figure, reference numeral 32 is the swing center axis of the cover 5, and 33 is the motor 9.
It is a switch knob for starting. The switch knob 33 is attached to the cover 5, and the switch provided inside the main body 1 can be turned on only after the cover 5 is closed.

By configuring the attitude control mechanism 25 as described above,
The cleaning body 4 revolves around the revolution center O while rotating on its axis.
In addition, the gear ratio of the sun gear 26 and the planetary gear 27 is 2.4:
By setting the value to 1, the cleaning element 4 revolves once during the revolution.
The surface of the disk 3 is wiped off by spinning four times and drawing a continuous film pattern of the locus P as shown in FIG. In each rotation cycle, the cleaning body 4 revolves only one half revolution. When the starting point Q is one edge of the disk 3, the locus P at this time is such that the end point R is located on the edge of the disk 3 that is substantially opposite to the starting point Q, and the diameter of the disk 3 is almost the most part. It follows the direction. Therefore, it is possible to avoid the loss of the signal due to the scratches as much as possible.

By setting the gear ratio of the sun gear 26 and the planetary gear 27 to a small value, the trajectory P is deviated for each revolution cycle. Due to the deviation of the locus P, the portions that were not wiped off last time are wiped one after another, and the entire surface of the disk 3 is completely cleaned.

Each cleaning pad 22 revolves around the revolution center O for each rotation cycle.
Take the same attitude against. For example, the cleaning pad 22 located on the peripheral edge of the disk 3 returns to the peripheral edge again after approaching the revolving center O, but at this time, the starting point Q and the ending point R of the trajectory P are in a position where they are substantially opposed to each other. Therefore, each cleaning pad 22 has an inverted posture with respect to the revolution center O. In other words, with the position closest to the revolution center O as a boundary,
The peripheral edge for wiping the disk 3 ahead of time is replaced. Therefore, the peripheral edge of the cleaning pad 22 is not partially damaged or unevenly worn. Further, in the non-recorded portion near the center of the disc 3, the cleaning pad 22 has the narrowest posture along the transition direction, so that unnecessary wiping can be prevented.

[Another embodiment]

In the above embodiment, the gear ratio between the sun gear 26 and the planetary gear 27 is set to a small numerical value so that the continuous film on the locus P has a polygonal shape, but this is not always necessary. For example, the sixth
As shown in FIGS. (A), (b), (c), and (d), the locus P may form a closed loop for each revolution cycle. However, in this case, it is preferable that the cleaning member 4 is formed in a ring shape so that the surface of the disk 3 can be prevented from being left unwiped.

The sun gear 26 and the planet gears 27 can be linked by a chain.

Further, as shown in FIGS. 7 (a) and 7 (b), the cleaning body 4 may be driven by meshing gears. In FIG. 7A, two intermediate gears 35 and 36 are provided between the sun gear 26 and the planet gear 27. In FIG. 7 (b), the planet gear 27 is used as a large gear and is directly meshed with the sun gear 26. Although the attitude control mechanism 25 can be variously changed in this way, the point is that the diameter line orthogonal to the diameter line of the disk 3 passing through the starting point Q of the locus P is the limit line S, and the end point R is on the limit line S or not. Any mechanism may be used as long as it can be located on the peripheral edge of the disk 3 facing the starting point Q with the cleaning element 4 interposed therebetween. When the end point R is located on the same side as the starting point Q with respect to the limit line S, the locus P includes many components along the circumferential direction of the disk 3.

It should be noted that the attitude control mechanism 25 uses the disk 3 in plan view.
It is preferable that the cleaning pad 22 is within the outer contour line, but in some cases, a part of the cleaning pad 22 protrudes out of the outer contour line of the disc 3 as shown by a locus P shown in FIG. 6 (a). It may be. In this case, it is advantageous in that the cleaning pad 22 can be cleaned by removing cotton dust or the like adhering to the cleaning pad 22 from the disk 3 or squeezing it off at the peripheral edge of the disk 3.

〔The invention's effect〕

As described above, in the present invention, the posture control mechanism 25 is configured so that the rotation cycle of the cleaning body 4 per revolution cycle can be made sufficiently small, and the locus P of the cleaning pad 22 for each rotation cycle is, for example, the disk 3 Since the starting point Q is at one peripheral edge of the disk and the end point R is located on the peripheral edge substantially opposite to the starting point Q, most of the trajectory P can be along the radial direction of the disk 3. Even if the surface of No. 3 is scratched, it is possible to eliminate the signal reading error and the generation of noise due to the scratch, and reliably prevent the loss of the signal.

Further, in order to obtain the locus P, the cleaning body 4
Since the posture control mechanism 25 is configured so as to revolve around the revolution center O on the center of the disc 3, the mechanism 25 is prevented from largely protruding from the outer line of the disc 3, and the disc cleaner is compact. It is possible to realize miniaturization in a lump.

[Brief description of drawings]

1 to 5 show an embodiment of the present invention. FIG. 1 is a plan view showing the movement trajectory of a cleaning pad, FIG. 2 is an internal plan view of a disk cleaner, and FIG. 3 is a vertical side view. FIG. 4 is a vertical sectional side view with the cover open, and FIG. 5 is an exploded perspective view of the cleaning body drive system. 6 (a), (b), (c), and (d) are plan views showing other examples of the movement trajectory of the cleaning pad. 7 (a) and 7 (b) are plan views conceptually showing another embodiment of the attitude control mechanism. FIG. 8 is a plan view showing an example of a conventional disk cleaner. FIG. 9 is a plan view showing another example of the conventional disk cleaner. 1 ... main body, 3 ... disk, 4 ... cleaning body, 22 ... cleaning pad, 25 ... posture control mechanism, O ... revolution center, P ... trajectory, Q ... starting point, R ... endpoint, S ... the limit line.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-60-234276 (JP, A) Actual opening 61-13389 (JP, U) Actual opening 61-40792 (JP, U) Actual opening 60- 116604 (JP, U) Actually open 61-153189 (JP, U)

Claims (4)

[Claims] 1. A main body case having a disk mounting surface (2)
The cleaning body (4) is equipped with (1), a cover (5) that covers the upper surface of the disc mounting surface (2) in an openable and closable manner, and a cleaning body (4) supported on the inner surface of the cover (5). , The center of revolution that coincides with the center of the disc (O)
It is a disk cleaner that revolves around the disk and wipes the surface of the disk (3) that is stationary on the disk mounting surface (2) along a circulation path. The drive gear (14) for driving the cleaning body (4) to rotate and the cleaning body at the revolution center (O) positions of the placing surface (2) and the inner surface of the cover (5) respectively.
(4) is rotatably supported and is provided with a support arm (29) which is rotatably supported around the revolution center (O), and when the cover (5) is closed, the drive is performed. An input gear (30) that meshes with the gear (14) is provided on the circumferential surface of the cleaning body (4), and the cleaning body (4) receives the rotation power of the cleaning body (4) on the cover (5) side. ) Is provided for the orbital movement of the sun gear (26) and the sun gear (26) fixed to the orbital center (O) position so that it cannot rotate. Cleaning body
(4) includes a planetary gear (27) that rotates along with the sun gear (26) so that the cleaning body (4) receives the meshing reaction force of the sun gear (26) and revolves in the direction opposite to the rotation direction. ) And the planetary gear (27) are meshed and connected, and when the locus (P) of each rotation cycle of the cleaning pad (22) starts at one peripheral edge of the disk (3) (Q), this starting point A disc cleaner in which the rotation period and the revolution period are set so that the end point (R) is located at one peripheral edge of the disc (3) which is almost opposite to (Q). 2. A disc (3) facing the starting point (Q) with the limit line (S) sandwiched between the diameter line orthogonal to the diameter line of the disc (3) passing through the starting point (Q). ) The disk cleaner according to claim (1), wherein the end point (R) of the locus (P) is located at one peripheral edge. 3. The disk cleaner according to claim 1 or 2, wherein the rotation cycle for one revolution cycle is set to a decimal value. 4. A sun gear (26) fixed to the center of revolution (O).
And a planetary gear (27) fixed to the center of rotation of the cleaning body (4)
And a timing belt wrapped around both gears (26/27)
The disk cleaner according to claim (1), (2) or (3), wherein the attitude control mechanism (25) is configured to include (28).