JPH0630960U - Magneto-optical disk - Google Patents

Abstract

(57) [Summary] [Purpose] Eliminate the erroneous welding work of magneto-optical disks with clamping plates and simplify quality control. [Structure] An information disk comprising a disk-shaped disk substrate 11 having a clamping plate in the central portion thereof, wherein a central hole 12 and a clamping plate bearing portion 13 are provided in the central portion of the disk substrate 11, and the clamping plate bearing By providing the mark portion 16 on the upper surface of the clamping plate holding portion 14 projecting from the upper inner periphery of the portion 13, it is possible to easily distinguish the discs of various types.
Erroneous work in disk processing can be eliminated, productivity can be greatly increased, and quality control can be simplified.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a magneto-optical disk for recording / reproducing information by magneto-optical means.

[0002]

[Prior art]

 In general, a magneto-optical disk of this type of information medium is used as a disk cartridge in which a clamping plate is ultrasonically welded to the center of a disk-shaped disk substrate and rotatably housed in a shell.

[0003]

[Problems to be solved by the device]

 However, with conventional magneto-optical disks, it is impossible or difficult to distinguish even if there are various types of disks on the appearance when using a magneto-optical disk or the like when mounting and processing by ultrasonic welding for welding the clamping plate. However, even if different types of discs are mixed in during the handling work, it cannot be found and often causes erroneous work, which complicates quality control including sorting work, and reduces reliability and productivity and quality. There was also a problem above. The present invention seeks to eliminate these conventional drawbacks, eliminates the erroneous operation of the disk, greatly improves the productivity, and significantly facilitates the quality control. The purpose is to provide a simple and low-cost product.

[0004]

[Means for Solving the Problems]

 According to the present invention, a clamping plate support portion is provided at the center of a disk-shaped disk base plate having a magneto-optical recording / reproducing groove forming surface, and a clamping plate is provided so as to protrude above and inside the clamping plate support portion. A magneto-optical disk having a plate holding portion and ultrasonically welding a clamping plate, wherein a mark portion is provided on an upper surface of the clamping plate holding portion.

[0005]

[Action]

 When ultrasonically welding the clamping plate to the central portion, the clamping plate is pressed and welded to the clamping plate support portion of the disc substrate with the ultrasonic horn through the clamping plate holding portion, and the clamping plate holding portion is also attached. By providing a mark on the upper surface through a step on the inner circumference of the upper part, the mark can be discriminated by the mark on the clamping plate holder, and the ultrasonic horn can be pressed to make sure there is no mistake in the disc type. Can be welded to the disc, and the discs can be sorted and identified by the mark on the upper surface, which enables accurate welding without mishandling the disc type, making it easy to mix discs of different types during the process. Can be found in a safe place, can be safely operated, and can improve productivity and simplify quality control, greatly improving quality and reliability. It can be improved.

[0006]

【Example】

 An embodiment of the present invention will be described with reference to FIGS. 1 to 5. A central hole 12 and a clamping plate support are provided in the center of a disk-shaped disk substrate 11 having a magneto-optical recording / reproducing groove forming surface 10. A magneto-optical disk comprising a portion 13, a clamping plate holding portion 14 provided on the inner surface of the clamping plate supporting portion 13 so as to protrude, and a clamping plate 15 being ultrasonically welded thereto. A mark portion 16 is provided on the upper surface of the holding portion 14, a flat surface 18 is formed by an ultrasonic horn 17, and the flat surface 18 is connected to the groove forming surface 10 to form a magneto-optical disk.

As the clamping plate holding portion 14, an annular convex portion projecting at a position facing the clamping plate 15 on the disk substrate 11, for example, a continuous annular projecting portion, or an intermittent annular shape is provided. Although the arcuate convex wall portions arranged in the above are used, it is preferable to form the flat surface 18 with no vertical burr by the ultrasonic horn 17 up to the substrate lead-in without the groove forming surface. That is, the clamping plate 15 is placed on the central portion of the disk substrate 10 by the ultrasonic horn 17 having the corresponding portion that crushes the vertical burr to form the flat surface 18 and the protrusion that presses the clamping plate holding portion 14. It can be welded.

The disk substrate 11 has a clamping plate 15 attached to a clamping plate support portion 13, is housed as an information medium in the upper and lower cases 1 and 2, and has a case in which an opening 3 such as a head insertion hole is formed. A shutter 4 having a substantially U-shaped cross section for opening and closing the opening 3 is used as a slidable cartridge, and the concave shutter 4 is slid on the concave shutter area 5. The lower case 2 is provided with a shaft insertion hole 7 opposed to the clamping plate 15, and a disc storage portion 6 is formed by additionally providing an erroneous erasure prevention plug 8 and a shutter lock 9. A label area 5 ₁ is provided on the outer surface.

The shell composed of the upper and lower cases 1 and 2 is selected and configured as shells of various kinds of cartridges that accommodate disk-shaped media such as floppy disks, compact disks, video disks, and optical disks. Further, the mark portion 16 can be sorted according to the number by a single or a plurality of convex strips or concave strips provided on the clamping plate holding portion 14 in a protruding manner. It is also possible to distinguish visually by marking or color-coded display, or by the shape of a recess or the shape of a notch. In this case, it is preferable to consider that the mark portion 16 is read, detected, and utilized automatically, and the ring-shaped upper surface of the clamping plate holding portion 14 can be effectively utilized. Be considered.

[0010]

[Effect of device]

 According to the present invention, a clamping plate support is provided at the center of a magneto-optical disc substrate, and a clamping plate holder is provided on the inner surface of the upper part of the periphery of the clamping plate support so that the clamping plate is sonicated. By providing a mark on the upper surface of the clamping plate holding part in the fused magneto-optical disk, even if different kinds of disks are mixed in during the working process, they can be easily sorted. Elimination of erroneous manufacturing work, productivity is greatly improved, and quality control can be simplified appropriately.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a perspective view of the example of FIG. 1 in a separated state.

FIG. 3 is an enlarged vertical sectional view taken along the line AA of FIG.

FIG. 4 is a partially enlarged vertical cross-sectional view at the time of welding.

5 is a perspective view of a portion of the example of FIG.

[Explanation of symbols]

 1 Upper Case 2 Lower Case 3 Opening 4 Shutter 10 Groove Forming Surface 11 Disk Substrate 12 Center Hole 13 Clamping Plate Support 14 Clamping Plate Holding 15 Clamping Plate 16 Mark 17 Ultrasonic Horn

Claims (2)

[Scope of utility model registration request] 1. A clamping plate supporting portion is provided at the center of a disk-shaped disk substrate having a magneto-optical recording / reproducing groove forming surface, and clamping is provided so as to protrude above and inside the clamping plate supporting portion. A magneto-optical disk having a plate holding portion and ultrasonically welding a clamping plate, wherein a mark portion is provided on an upper surface of the clamping plate holding portion. 2. The magneto-optical disk according to claim 1, wherein the mark portion is a convex line or a concave line provided on the clamping plate holding unit in a single or plural projecting manner.