JP2580705B2 - Disk cassette - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a disk cassette for cleaning a recording disk with a cleaning unit.

SUMMARY OF THE INVENTION According to the present invention, a recording disk is housed in a case, a lifter is provided on the inner surface of the case, and a cleaning unit is provided between the lifter and the case other than the lifter and the recording disk. In the disc cassette, the cleaning portion is formed of a nonwoven fabric material in a region receiving the pressing force of the lifter and a flocked material in other regions, so that no adhesive is used in the region receiving the pressing force of the lifter. Therefore, the cleaning action is performed without being adversely affected, and in a region where the lifter pressing force is not applied, a sufficient cleaning action is performed by the flocking agent. Thus, the adhesive is not adversely affected and a sufficient cleaning effect is expected. You can do it.

[Related Art] In a conventional disk cassette, a recording disk is rotatably housed in a case, and a lifter is provided on an inner surface of the case. The lifter is made of an elastic member, and presses the recording disk against the inner surface of the case facing with the elastic force. A cleaning member is provided between the lifter and other inner surfaces of the case and the recording disk. The cleaning member has substantially the same shape as the recording disk and is fixed to the case. The cleaning member is made of a non-woven fabric material that does not use an adhesive by thermal bonding, or a fiber is implanted in the adhesive layer. What consists of a standing flocking material is used.

Thus, when the recording disk is rotated, the recording disk comes into contact with the cleaning member or the like and dust attached to the signal recording surface of the recording disk is taken into the cleaning member and the signal recording surface is cleaned. . In particular, at the cleaning member located between the lifter and the recording disk or between the inner surface of the case facing the lifter and the recording disk, the cleaning member is in pressure contact with the recording disk, so that the cleaning effect is improved.

[Problems to be Solved by the Invention] However, those using a nonwoven fabric material as the cleaning member are inferior in dust collecting property for taking in dust into the cleaning member due to the properties of the nonwoven fabric. As a cleaning effect, in addition to the above-mentioned dust collecting properties, it is necessary that the cleaning member has a dust-preventing property so that the cleaning member itself does not emit dust and the taken-in dust does not go outside again. However, it cannot be said that the particles have excellent dust-preventing properties because they are cut and the cut fibers go outside. Today, as the capacity increases due to the high-density recording, the write / read error rate increases and it is difficult to cope with the increase in the capacity unless a cleaning effect higher than the cleaning effect of the nonwoven fabric material is provided.

Further, those using a flocked material as a cleaning member are excellent in dust collecting property and dust prevention property, but are located between the lifter and the recording disk or between the inner surface of the case facing the lifter and the recording disk. In some places, the fibers fall down due to the pressing force of the lifter, and the recording disk comes into contact with the adhesive layer. When the recording disk comes into contact with the adhesive layer, there is a disadvantage that the signal recording surface is chemically changed and the recording / reproducing characteristics are deteriorated.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a disk cassette which is free from inconvenience such as chemical change and has a cleaning effect capable of coping with a large capacity.

[Means for Solving the Problems] A disk cassette according to the present invention for achieving the above object accommodates a recording disk rotatably in a case, provides a lifter on the inner surface of the case, and uses the lifter to perform the recording. The disc is pressed against the inner surface of the opposing case, and a cleaning unit is provided between the lifter and the recording disc and between the case and the recording disc other than where the lifter is located. The region receiving the pressing force of the lifter is made of a nonwoven material that does not use an adhesive, and the other region is made of a flocked material in which fibers are planted in the adhesive layer.

[Operation] When the recording disk rotates, its signal recording surface rotates while being in contact with the cleaning unit, and dust adhered to the signal recording surface is taken into the cleaning unit. The cleaning portion of the nonwoven fabric is pressed against the signal recording surface in the area where the lifter presses, but no adhesive is used. However, since there is no pressure contact with the signal recording surface and the adhesive layer does not contact the signal recording surface, there is no adverse effect due to a chemical change.

The cleaning portion is made of a non-woven fabric material in a region where the lifter is pressed, but is pressed against the signal recording surface. Since it is made of a material, there is a sufficient cleaning effect.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

1 to 5 show an embodiment of the present invention.

The disk cassette includes a recording disk 9 and a case A for rotatably storing the recording disk 9.

The recording disk 9 has a hub fixed to the center of a flexible substrate. A ring-shaped signal recording surface 9a is formed on both surfaces of the flexible substrate, and signals are recorded on the signal recording surface 9a by a head. The hub has a center hole and a drive pin insertion hole formed of a magnetic material, and the hub is chucked by a chucking portion of the drive device.

The case A has a substantially uneven square shape, and the lower case 1 and the upper case 2 abut against each other at their peripheral edge surfaces.

FIG. 1 shows a view as seen from the inner side of the lower case 1, and FIG. 2 shows a view as seen from the inner side of the upper case 2. A center hole 3 is formed at the center of the lower case 1, and the hub of the recording disk 9 is exposed from the center hole 3. A circumferential rib 4 protrudes from the center of the upper case 2.
The movement of the hub in the radial direction is regulated. Outer walls 5 scattered around the circumference are provided on the outermost sides of the lower case 1 and the upper case 2, and inner walls 6 are provided on the inner side of the upper case 2. Have been. The upper case 2 has a disk surface rotation area 1 between the outer wall 5 and the inner wall 6 and the lower case 1 has a disk surface rotation area 1 between the outer wall 5 and a position corresponding to the inner wall 6 of the upper case 2. It is configured. A head insertion hole 7 is formed at a position of the lower case 1 and the upper case 2 facing each other in the disk surface rotation area 1, and a head is inserted into the case A from the head insertion hole 7. A lifter 8 is mounted in the disk surface rotation area 1 of the lower case 1. The lifter 8 is made of an elastic metal plate, one end of which is fixed to the lower case 1 and the free end of which presses the recording disk 9 via a cleaning unit 11 described below. A protrusion 10 extending in the circumferential direction is provided at a position of the upper case 2 facing the lifter 8, and the recording disk 9 pressed by the lifter 8 is pressed against the protrusion 10 via the cleaning unit 11.

The cleaning unit 11 has a sheet shape that is the same as the disk surface rotation area l excluding the head insertion hole 7.
And the upper case 2 with an adhesive 12 or the like. The cleaning unit 11 of the lower case 1 is provided between the lifter 8 and the recording disk 9 and the lower case 1 other than the lifter 8.
It is arranged between the inner surface and the recording disk 9 and in the disk surface rotation area l. The cleaning unit 11 of the upper case 2 is disposed between the inner surface of the upper case 2 and the recording disk 9 and in the disk surface rotation area l.
Further, both the cleaning unit 11 is constituted by a nonwoven material which does not use the upper and adhesive in the region L ₁ receives a pressing force of the lifter 8 is its vicinity of the lifter 8, also not subject to the pressing force of the lifter 8 It is composed of a flocked material in the region L _2.

FIG. 3 shows a cleaning section 11 of the nonwoven fabric material. In this embodiment, the nonwoven fabric material is formed by intermittently bonding the nonwoven fabric 13 with a thermal bond, but may be formed without using an adhesive. I just need.

FIG. 4 shows a flocked material cleaning section 11, which is formed by forming an adhesive layer 15 on the surface of a base film 14, and implanting fibers 16 into the adhesive layer 15 by using, for example, a charging action. Have been.

 Hereinafter, the operation of the above configuration will be described.

When the disk cassette is mounted on the drive device and the recording disk 9 rotates, its signal recording surface 9a rotates while contacting the cleaning unit 11. Cleaning unit 11 of the region L ₁ in nonwoven materials receives a pressing force of the lifter 8 is pressed against the signal recording surface 9a, adverse effects of it for not using an adhesive with good cleaning effect is obtained is none. Cleaning unit 11 of the pressable not the force area L ₂ in flocked material lifter 8 is in contact with the signal recording surface 9a, good cleaning effect is obtained. The cleaning unit 11
Has an adhesive layer 15, but the cleaning unit 11 has a signal recording surface.
9a, the adhesive layer 15 is merely in contact with the signal recording surface 9a.
There is no possibility that the pressure-sensitive adhesive adheres to the signal recording surface 9a and does not adversely affect by the chemical change.

In addition, the cleaning unit 11 of the nonwoven fabric material is inferior in dust-preventing properties, and once taken in dust and frayed fibers may go outside. It is taken in.

FIG. 5 shows another embodiment of the flocked material cleaning unit 11. In this embodiment, the adhesive layer 15 is formed on the inner surface of the lower case 1 or the upper case 2, and the fibers 16 are directly implanted on the adhesive layer 15. This configuration has the same operation and effect as described above.

Further, as compared with the above embodiment, there is no need to attach the sheet-shaped cleaning unit 11 to the lower case 1 or the upper case 2, and the base film 14 is not required.

In this embodiment, the region L ₁ which receives the pressing force of the lifter 8 is used.
And although the other boundary of the area L ₂ of defines always receive point the pressing force of the lifter 8 even slightly, may be determined at the point which receives the pressing force of the lifter 8 constant or higher, the pressing force of the lifter 8 May be determined at a point temporarily received due to the influence of surface runout or the like, and the boundary between the cleaning unit 11 of the lower case 1 and the upper case 2 may be different.

[Effects of the Invention] As described above, according to the present invention, the cleaning portion provided between the case and the recording disk is made of a nonwoven fabric material in a region receiving the pressing force of the lifter, and is made of a flocked material in other regions. With this configuration, there is an effect that there is no adverse effect of the adhesive, and a cleaning effect that can sufficiently cope with a high capacity can be obtained.

[Brief description of the drawings]

1 to 5 show an embodiment of the present invention. FIG. 1 is a view of the lower case viewed from the inside, FIG. 2 is a view of the upper case viewed from the inside, and FIG. 3 is a view of FIG. FIG. 4 is a sectional view taken along line AA, FIG. 4 is a sectional view taken along line BB of FIG. 1, and FIG. A: Case, 8: Lifter, 9: Recording disk,
11 ...... cleaning unit, 15 ...... adhesive layer, 16 ...... fiber, L ₁
... A region receiving the lifter pressing force, L ₂ ... A region not receiving the lifter pressing force.

Claims (1)

(57) [Claims] 1. A recording disk is rotatably housed in a case, a lifter is provided on an inner surface of the case, and the lifter presses the recording disk against an inner surface of an opposite case. A cleaning unit is provided between the recording disk and the case other than where the lifter is located, and the cleaning unit is made of a nonwoven material that does not use an adhesive in an area that receives the pressing force of the lifter. A disc cassette characterized by comprising a flocked material in which fibers are planted in an adhesive layer in other areas.