JPH0249283A - Disk - Google Patents

Abstract

PURPOSE:To rapidly and satisfactorily mount a recording sheet by mounting the recording sheet on a disk by providing grooves inside and outside a recording area and inputting with pressure a ring member in the grooves. CONSTITUTION:The grooves 5 and 6 are formed at the inner and outer sides of the recording area L on a substrate 1 which forms the disk, respectively, and the recording sheet 7 can be mounted on the substrate 1 by inputting with pressure the ring members 8 and 9 in the grooves. By employing such constitution, it is possible to mount the recording sheet on the substrate satisfactorily with a uniform tensile force in a radial direction rapidly and easily in the area 7 without using a bonding agent.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disk having a recording sheet stretched over the surface of a substrate, and particularly relates to a mounting structure for the recording sheet.

[Summary of the Invention] The present invention provides a disk in which a recording sheet is arranged on the surface of a substrate, in which grooves are formed on the inner circumferential side and the outer circumferential side of the disk, and a ring member is inserted from above the recording sheet together with the recording sheet. By attaching the 1N recording sheet to the board by press-fitting, the following effects are achieved: the time required to attach the record notebook is shortened, dropouts due to dust on the attachment material do not occur, and a simple device is required for attachment. There is.

[Prior Art] FIG. 3 shows a conventional example of a disk in which a recording sheet is stretched over the surface of a substrate. In FIG. 3, the weir plate 10 has a substantially disk shape, and a hub hole 11 is formed in the center thereof. A strip-shaped recording area 7 is formed on both the upper and lower surfaces of the substrate 10, with the hub hole 11 as the center, and the upper and lower surfaces of this recording area are cut out to form sheet relief grooves 12. Further, the outermost and innermost sides of the upper and lower surfaces of the substrate 10 are tapered so that the thickness becomes thinner toward the outermost and innermost sides, thereby forming a tapered bonding surface 13. A sheet reference plane I4 is located between the tapered adhesive surface 13 on the inner circumference and the sheet relief groove I2 and between the sheet relief groove 12 and the tapered adhesive surface 13 on the outer circumference.

Two record sheets! 5 has a circular shape with a central hole 15a formed in the center. These two recording sheets I5 are placed on the lower surface of the substrate 10, and are stretched over the substrate 10 with an adhesive 16 applied to the tapered adhesive surfaces I3 on the inner and outer peripheries.

To manufacture a disk having such a configuration, the recording sheet 15 is stretched with uniform tension in all radial directions using a mounting device, and adhesive I6 is applied to the tapered adhesive surface 13 of the substrate 10. This is done by pasting the recording sheet 15 under tension as described above to the surface of the substrate 10.

[Problems to be Solved by the Invention] However, in the conventional disk described above, it is necessary to apply a constant tension to the recording sheet 15 until the adhesive 16 dries. This method has the disadvantage that a recording sheet (15) must be attached, resulting in poor productivity.

Further, when the adhesive 16 dries, it tends to turn into dust, which is a drawback in that this dust can cause dropouts.

Furthermore, the mounting device must be capable of applying uniform tension to the recording sheet 15 in all radial directions. Therefore,
The mounting device has drawbacks such as high mechanical precision and high cost, as well as requiring a large installation space.

Therefore, it is an object of the present invention to provide a disc that eliminates the above-mentioned drawbacks.

[Means for Solving the Problems] To achieve the above object, the disc of the present invention has a substantially disc shape, and at least one of the discs has a strip-shaped recording area centered around the center of rotation, and the recording area is A substrate provided with ring-shaped grooves on the inside and outside of the area, a recording sheet placed on both sides of the substrate constituting the recording area, and press-fitted into the groove together with the recording sheet from above the recording sheet. and a ring member.

[Operation] To manufacture a disk, a recording sheet is placed on the side of the substrate that is to be a recording area, and ring members are press-fitted from above the recording sheet into grooves on the inner and outer peripheries, respectively.

Then, the inner and outer peripheries of the recording sheet are embedded in the groove together with the ring members, and the recording sheet is stretched with a uniform tension in the entire radial direction in the recording area between the ring members on the inner and outer peripheries.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

An embodiment of the present invention is shown in FIGS. 1 and 2. FIG.

In FIGS. 1 and 2, a substrate 1 is formed into a substantially disk shape from a relatively hard material such as an aluminum alloy or a polyimide resin added with a reinforcing material. A hub hole 2 is formed in the center of this substrate 1, and a spindle of a disk drive device is inserted into this hub hole 2 to rotate the disk. A belt-shaped recording area is formed on both upper and lower surfaces of the substrate 1 with the hub hole 2 at the center, and the surface of this recording area is cut out to form a sheet relief groove 3. Inside (hub hole 2 side) and outside (opposite hub hole 2 side) from this recording area
The surfaces of the reference surfaces 4a and 4b constitute the reference surfaces 4a and 4b.
4b, a recording sheet 7 described below is positioned with respect to the substrate 1.

Ring-shaped grooves 5 and 6 centered on the hub hole 2 are formed in the inner and outer reference surfaces 4a and 4b, respectively.

Two of these grooves 5 and 6 are provided on the inner and outer reference surfaces 4a and 4b, and the ones farthest from the recording area (the outermost and innermost positions) are the main grooves 5. , the one located close to the recording area is configured as a sub i6. Both the main groove 5 and the sub groove 6 have a substantially semicircular cross section, and the main groove 5 and the sub groove 6 have a substantially semicircular cross section. t5 is formed to have a larger diameter than the sub groove 6.

The two recording sheets 7 have a circular shape somewhat larger than the substrate 1, and a center hole 7a is formed in the center thereof. These two recording sheets 7 are arranged on the upper and lower surfaces of the substrate 1, respectively, and a ring member 8.9 is press-fitted into the groove 5.6 from above each recording sheet 7.

The ring members 8.9 are composed of a total of four members, a main ring member 8 which is press-fitted into the main groove 5, and a sub-ring member 9 which is press-fitted into the sub-groove 6. The main ring member 8 is made of a rubber material, and the sub ring member 9 is made of a metal material, and it is preferable to use a softer material for the ring members 8.9 closer to the innermost or outermost circumference.

Thus, the recording sheet 7 located near the recording area is stretched over the sheet relief groove 3, and a head is pressed into contact or a flying head is brought close to the seven locations of the recording sheet around this recording area. Then, the recording sheet 7 is recorded on the recording sheet 7 or the signal recorded on the recording sheet 7 is picked up while the recording sheet 7 is bent toward the sheet clearance groove 3 due to pressure from the head or the like.

Next, a method for manufacturing the disk having the above configuration will be explained.

The recording sheet 7 is placed on one surface of the substrate l, and the main ring member 8 is simultaneously press-fitted from above the recording sheet 7 into the two main grooves 5 on the inner reference surface 4a and the outer reference surface 4b. .

Next, the sub-ring members 9 are press-fitted into the sub-grooves 6 at two locations on the inner reference surface 4a and the outer reference surface 4b from above the recording sheet 7. Then, similarly to the above, the recording sheet 7 is fixed to the other side of the substrate 1 using the ring member 8.9, and the process is completed.

In the above process, when the main ring member 8 is press-fitted, the recording sheet 7 is pushed into the inner and outer main WII 5a, so the recording sheet 7 between the inner and outer main grooves 5
The effective path of the recording sheet becomes longer, and the recording sheet is pulled at seven locations between the main grooves 5, and a constant tension is applied thereto. When the sub ring member 9 is press-fitted, the recording sheet 7 is pushed into the inner and outer sub grooves 6, so that the recording sheet 7 is pushed into the inner and outer main grooves 5.
Since the actual path of the recording sheet 7 becomes longer, the recording sheet 7 between the sub-grooves 6, that is, in the recording area, is further pulled and a higher tension than above is applied. Furthermore, since the recording sheet 7 is embedded and stretched by the same length in all radial directions by press-fitting the ring member 8.9 into the ring-shaped groove 5.6, the recording sheet 7 is uniformly spread in all radial directions. Tension acts.

In this embodiment, the recording sheet 7 is stretched over the substrate l by a pair of sub ring members 9 in addition to the main ring member 8, but it is also possible to use only the main ring member 8.
The recording sheet 7 may be stretched by a plurality of pairs of sub ring members 9. By varying the cross-sectional radius dimension of the sub ring member 9, the tension of the recording sheet 7 can be set to a predetermined value, and multiple pairs of sub ring members 9 can be set.
By providing this, it becomes possible to finely adjust the tension of the recording sheet 7.

Further, in this embodiment, the cross-sectional shape of the grooves 5 and 6 was formed into a substantially semicircular shape, but any shape that allows the recording sheet 7 to be pushed into the groove 5 and 6 and fixed thereto may be used, such as a rectangular shape or a substantially inverted square shape. You can.

[Effects of the Invention] As described above, according to the present invention, grooves are formed on the inner circumferential side and the outer circumferential side of the disk, and a ring member is press-fitted together with the recording sheet from above the recording sheet, so that the recording sheet is Since it is attached to the substrate, it has the following effects: the time required to attach the recording sheet is shortened, there is no dropout due to dust on the attaching material, and the attachment does not require a simple kerging device. Also, when fixing the recording sheet with an adhesive as in the past, it was difficult to make the tension of the recording sheet uniform in all radial directions, but according to the present invention, it is possible to make the tension of the recording sheet uniform. It also has the effect of making it easier.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention, FIG. 1 is a sectional view taken along the line A-A in FIG. 2, FIG. 2 is a plan view of the disk, and FIG. 3 is a conventional disk. FIG. 1. IO...Substrate, 7.15...Recording sheet, 5゜6...Groove, 8゜9...Ring member, L...Recording area. Qi Sukgu I! llI Figure 2

Claims (1)

[Claims] (1) A substrate having a substantially disk shape, having a belt-shaped recording area formed around the center of rotation on at least one surface, and ring-shaped grooves provided inside and outside the recording area, respectively; A disk comprising: a recording sheet disposed on the side of the substrate constituting the recording area; and a ring member press-fitted into the groove together with the recording sheet from above the recording sheet.