JPH048538Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention relates to a floppy disk device, in particular, a floppy disk housed in a flat casing is rotated, and the floppy disk is brought into contact with a head inserted through a head insertion opening for storage or reading. Regarding a floppy disk device.

[Background technology and its problems]

A floppy disk device, which is widely used as a recording medium for computers and the like, stores a circular floppy disk in a flat casing, and stores or reads signals by placing the floppy disk in contact with a head while rotating within the casing. This is how it was done. If dirt adheres to the surface of such a floppy disk, this will cause signal dropout. Therefore, conventionally, a cleaning non-woven fabric is disposed inside the casing, and this non-woven fabric is elastically pressed onto the surface of the floppy disk using a pressing means to remove the dust adhering to the surface of the floppy disk. ing. Figures 1 and 2 show a press plate 1 used in a conventional floppy disk device. The sheet is bent at the bent portion 2 formed, and the horizontal mounting portion 3 is fixed to the inner surface of the casing 5 via a double-sided adhesive tape 4. Therefore, according to such a conventional pressing plate 1, the elastic restoring force of the bent portion 2 can press the nonwoven fabric to the surface of the floppy disk, and it is possible to provide a cleaning function and to prevent minor damage to the floppy disk. It provides brake torque and stabilizes the rotation of the floppy disk.
However, if such a conventional press plate 1 is placed in the casing 5 as it is, it will move freely and will not function properly. Therefore, be sure to use double-sided adhesive tape 4
This requires adhesive means or fixing means such as the like, which increases the number of assembly steps and is one of the causes of increasing the cost of the floppy disk.

[Purpose of invention]

The present invention was developed in view of these problems, and does not require a fixing means to fix the pressing means to the casing, thereby reducing assembly man-hours and being cost-effective. The object of the present invention is to provide a floppy disk device.

[Summary of the idea]

The present invention provides a floppy disk device in which a floppy disk is housed in a flat casing, and a cleaning means is pressed onto the surface of the floppy disk by a pressing means provided inside the casing. A floppy disk device characterized in that a sheet having a positioning means is provided so as to be placed at a predetermined position, and the pressing means is constituted by a pressing piece provided on the sheet so as to be elastically deformable. This allows the pressing means to be placed at a predetermined position within the casing without using any fixing means.

【Example】

The present invention will be explained below with reference to an illustrated embodiment.
FIG. 3 shows a floppy disk device according to this embodiment, and this floppy disk device is equipped with a casing 10. As shown in FIG. The casing 10 has a pair of upper and lower synthetic resin halves 11,1.
It is composed of 2. A head insertion opening 13 is formed in each of the upper and lower halves 11 and 12, and a chuck insertion opening 14 is formed in the center of the lower half 12. Further, a side wall portion 15 is formed on the peripheral edge of the halves 11 and 12, and ribs 16 are formed on the inner surfaces of these halves 11 and 12 along a circular locus, and these ribs 16 allow the floppy disk to be 18 storage spaces are formed. Also half 11,1
Welding bosses 17 are formed at the corner portions of 2, respectively, and the casing 10 can be assembled by joining these bosses 17 to each other by ultrasonic welding. The floppy disk 18 housed within the casing 10 is composed of a circular sheet.
A magnetic layer is formed on at least one surface thereof. Further, a dish-shaped core metal 19 is attached to the center of the floppy disk 18. On the upper and lower sides of this floppy disk 18, circular nonwoven fabrics 2 constituting cleaning means are respectively provided.
0 and 21 are arranged. Next, the pressing sheet 22 for elastically pressing these nonwoven fabrics 20 and 21 onto the surface of the floppy disk 18 will be explained.The sheet 22 is made of a polymeric material such as polyethylene terephthalate or an elastic metal material such as phosphor bronze. As shown in FIG. 4, it has a substantially circular shape similar to the floppy disk 18. A pressing piece 24 that can be elastically deformed is formed on this sheet 12 via a bent portion 23 . The pressing piece 24 is provided by cutting the sheet 22 and bending the base thereof using heat or pressure to form a bent portion 23. The sheet 22 also has a head insertion opening 25 and a center hole 26, respectively. Note that these head insertion ports 25 and center hole 26 are one turn larger than the head insertion port 13 and center hole 14 formed in the casing 10, and the nonwoven fabric 21 is inserted through the head insertion port 25 and center hole 26. It is designed so that it can be welded to the inner surface of the lower half 12. Also, a pair of positioning protrusions 28 are formed on a part of the outer circumferential side of the pressing sheet 22, and these protrusions 28 serve to prevent rotation. 29, whereby the seat 22 is engaged with the casing 1.
It is arranged at a predetermined position within 0. Further, a protrusion 27 is formed on the inner surface of the upper half 11 at a position facing the pressing piece 24 . Next, the operation of this floppy disk device having the above structure will be explained. The floppy disk 18 in the casing 10 is held by the chuck into which the chuck insertion opening 14 is inserted, and is driven through this chuck. This causes the floppy disk 18 to rotate within the casing 10. At the same time, the floppy disk 18 is brought into contact with a magnetic head inserted through the head insertion opening 13, thereby storing (writing) or reading various signals. When storing or reading out such a signal, as shown in FIG. The surface of the floppy disk 18 is cleaned by these nonwoven fabrics 20 and 21. Therefore, dropout caused by dust adhering to the surface of the floppy disk 18 can be prevented. Furthermore, the nonwoven fabrics 20 and 21 apply a slight braking torque to the floppy disk 18, thereby achieving stable rotation of the floppy disk 18. Furthermore, in this floppy disk device,
In particular, a pressure sheet 22 as shown in FIG. 4 is used, and has a substantially circular shape, and
By providing the positioning protrusion 28, it can be correctly placed on the upper surface of the half 12 of the casing 10 without using adhesive means such as double-sided adhesive tape. Therefore, there is no need to use double-sided adhesive tape when assembling this floppy disk device, and no man-hours are required for this purpose. Therefore, the number of assembly steps is reduced, and it is very advantageous in terms of cost. Note that the press sheet 2 according to this example
2 connects the lower nonwoven fabric 21 to the half 12 at its head insertion opening 25, center hole 26, and outer circumference.
However, if necessary, the nonwoven fabric 21 may be fixed to the half 12 more completely by cutting out a portion other than the pressing piece 24 through the cutout portion. Next, press sheet 2 according to a modification of the above embodiment
2 will be explained with reference to FIGS. 6 and 7.
In this modification, both sides of the circular pressure sheet 22 are cut out linearly, thereby increasing the space for welding the lower nonwoven fabric 21 to the inner surface of the lower half 12. ing. Therefore, according to such a modification, the nonwoven fabric 21 can be fixed more reliably. Further, in this modification, the shape of the pressing piece 24 is a simple rectangle. Next, a press sheet 22 according to still another modification example
To explain with reference to Figures 8 and 9,
In this modification, three pressing pieces 24 are formed on the pressing sheet 22 at intervals of 90 degrees along the circumferential direction. Therefore, the floppy disk 18 can be cleaned at three locations, and the floppy disk 18 can be cleaned at three locations.
Therefore, the rotation of the floppy disk 18 becomes more stable.

[Effect of the idea]

As described above, the present invention provides a sheet having a positioning means so as to be placed at a predetermined position within a casing, and the pressing means is constituted by a pressing piece provided on this sheet so that it can be elastically deformed. be. Therefore, it becomes possible to assemble the floppy disk device without using adhesive means such as double-sided adhesive tape, and the number of assembly steps and costs can be reduced.

[Brief explanation of drawings]

Fig. 1 is an external perspective view showing a press plate used in a conventional floppy disk device, Fig. 2 is a cross-sectional view of the same in the attached state, and Fig. 3 is an exploded perspective view of a floppy disk device according to an embodiment of the present invention. , FIG. 4 is a plan view of the pressing sheet placed on the lower half, FIG. 5 is a vertical sectional view of the main part of the floppy disk device showing the action of this pressing sheet, and FIG. 6 is a pressing sheet according to a modified example. 7 is the same side view,
FIG. 8 is a plan view of another modified example of the press sheet, and FIG.
The figure is a side view of the same. In addition, in the symbols used in the drawings, 10... Casing, 18... Floppy disk, 20, 21... Nonwoven fabric, 22... Pressing sheet, 23... Folded portion, 24... Pressing piece, 28
. . . positioning protrusion, 29 . . . locked portion.

Claims (1)

[Scope of utility model registration request] In a floppy disk device in which a floppy disk is housed in a flat casing and a cleaning means is pressed onto the surface of the floppy disk by a pressing means provided inside the casing, the floppy disk is placed at a predetermined position in the casing. A floppy disk device characterized in that a sheet having positioning means is provided so that the sheet is arranged, and the pressing means is constituted by a pressing piece provided on the sheet so as to be elastically deformable.