JPH03212872A - Disk cassette - Google Patents

Abstract

PURPOSE:To reduce the number of components and assembling man-hours of a disk cassette by pressing slidably a shutter to the cover closing position of a head insersion hole with an arm with elasticity provided integrally with the shutter. CONSTITUTION:The cross-sectional shape of the shutter 8 which opens and closes the head insersion hole 5 is comprised in almost U-shape with a pair of upper and lower parallel shutter plates 9 and a connecting part 10 connecting them, and it is guided with a slidable guide along one edge 3a of a case 3, and is mounted slidably freely. Also, the arm 13 comprising a spring for shutter cover closing and bendable against elasticity is provided integrally with one end 8a of the connecting part 10 of the shutter 8. Then, the shutter 8 is pressed slidably to the cover closing position of the head insersion hole 6 with the bend reaction of plural curvature parts 14a, 14b of the arm 13 by pressing the tip 13a of the arm 13 to part 3b of the inner wall part of the case 3 against the elasticity. In such a way, it is possible to reduce the number of components and the assembling man-hours of the disk cassette.

Description

[Detailed description of the invention]

FIELD OF INDUSTRIAL APPLICATION] The present invention relates to a bamboo shutter for a disk cassette that is most suitable for application to, for example, a floppy disk cassette. [Summary of the invention] The invention provides a case in which a disk-shaped recording medium is rotatably housed, and a shutter that is slidably attached along one edge of the case and that opens and closes a head insertion hole of the case. ? The number of parts of the disk cassette is reduced by sliding the shutter into the closed position of the head hole using an elastic arm provided integrally with the shutter. [Prior art] As a conventional 70-inch disk/power unit. For example, there is the publication of Hyoukai No. 58-169379. This conventional floppy disk cassette A case in which a floppy disk, which is a disk-shaped recording medium, is rotatably housed; a shutter slidably attached along one edge of the case to open and close a head insertion hole of the case; and a shutter. One end of the shutter and the upper J are pressed so that the entire above-mentioned hent' insertion hole is slidably biased to the closed position.
It is fully equipped with a shutter-closing spring, which can be a torsion spring or an attraction coil spring, which is fully locked at both ends in a part of the case. When the floppy disk cassette is not in use, the shutter is urged to slide to the closed position by the shutter closing spring to close the head insertion hole and prevent the head from entering the case. When using a floppy disk cassette, when the entire floppy disk cassette is inserted into the floppy disk drive, slide the shutter against the shutter closing spring to the open position to cover all 8 head insertion holes, and close all 8 magnetic heads. Record floppy disks by inserting the head into the case through the head insertion hole.
It performs regeneration. [Problems to be Solved by the Invention] However, the conventional floppy disk cassette uses a spring for closing the shutter, which is a separate part from the shutter, resulting in a large number of parts and a large number of man-hours for cultivation. To prefecture,
Commercially available floppy disk cassettes have a structure in which the spring for closing the shutter lid is attached to the inside of the case and the spring for closing the shutter lid is attached to the outside of the entire shutter case (-714), so the spring for closing the shutter lid and the shutter can be assembled into the case at the same time. First, the shutter closing spring and the shutter have to be assembled into the case separately, and then the complicated work of interlocking or connecting them must be performed, which poses a problem in that the assembly work is time-consuming. Inventively, the entire purpose of the present invention is to provide a diffuser that eliminates the need to assemble the shutter closing spring and the shutter separately into the case. For this reason, the disk car of the present invention t=
7. An arm which can be bent against elasticity is provided at one end of the shutter which is slidably attached along one end edge of the case, and the shutter is moved by the bending reaction force of the arm to the head of the case. It is configured to slide and bias the insertion hole to the closed position. [Function] The disk cassette constructed as described above has an arm integrally provided at one end of the shutter, which completely constitutes a conventional shutter-closing spring. Therefore, the shutter and the arm can be assembled to the case at the same time, and there is no need to separately assemble the shutter closing spring and the shutter to the case as in the conventional case. [Embodiment] Below, an embodiment of the present invention applicable to a floppy disk/cassette will be described with reference to all the drawings. 1. As shown in FIGS. 1 to 3, the case 3 composed of the upper and lower halves 1.2 has a flat, almost rectangular shape, and has a 70mm disk-shaped recording medium inside.

[Magnetic Deinuk] 4 is rotatably stored. A substantially rectangular head insertion hole 5 is provided in the upper and lower halves 1 and 2 at approximately the center of one end H3a@ of the case 3. It is preferable that the head insertion hole 5 is provided on at least one of the upper and lower nozzles 1.2. A turntable insertion hole 6 is provided approximately in the center of the lower half 2. The shutter 8 that opens and closes the head insertion hole 5 has a substantially U-shaped cross-sectional shape with a pair of upper and lower parallel shutter plates 9 and a connecting portion 10 that connects them. The opening 11 is provided so as to be biased to one side. This shutter 8 connects both sides of the ivy 9 to both the upper and lower sides of the case 3? It is attached to the outside of the case 3 so as to overlap in parallel in a shallow recess 12 provided in the Ti, and is guided by a sliding guide (not shown) along one end edge 5a of the case 3. In other words, it is attached so as to be slidable in directions a and b. Incidentally, this shutter 8 is molded from synthetic resin, and a spring for closing the shutter is attached to one end 8a of a connecting portion 10 of the shutter 8. An arm 13 that can be bent against the elasticity of the arm 16 is integrally provided by integral molding.The arm 16 is formed in a zigzag shape by a plurality of bending portions 14a and 14b, which are approximately V-shaped, for example. , a valley bending point, an intermediate point between bending points, etc. Nodes 15 of the image number are formed.The arm 13 is located within a substantially triangular space 16 on the outer periphery of the floppy disk 4 in the case 3. At this time, the plurality of bent portions 14a and 1.db bent portions 131-13z of the arm 13 should be configured to be larger on the outer peripheral side of the case 6 and smaller on the circumferential side of the case 3. As a result, the arm 13 can be effectively arranged within the substantially triangular space 16, and the bent portion 14 of the number of shares can be effectively arranged.
a, 14b are prevented from interfering with the outer periphery of the 70-piece disk B. Then, by pressing -m3b of the inner wall of the tip 13a'i of the arm 13 against the elasticity of the case 73, By the bending reaction force of the plurality of bending parts 1da and 14b of arm B, the shutter 8 is urged to slide in the direction of arrow a to the closed position of the head insertion hole 6 shown by the solid line in FIG. , when assembling the shutter 8 to the case 3, the upper and lower halves 1.
The arm 13 is inserted into the substantially triangular space 16 from the slit 17 between the two as shown by the arrow in FIG. Insert both shutter plates 9 of the shutter 8 to the outside of both recesses 12 of the case 3 from the direction of arrow d in FIG. It can be easily assembled inside the case 6 at the same time and with one touch. Note that when both shunter plates 9 of the shutter 8 are completely inserted into both recesses 12 from the direction of arrow d, the shutter 8 is moved against the sliding guide of the case 3 (
(not shown) to prevent the shutter 8 from falling off from the case 3 in the opposite direction of the arrow d. The floppy disk cassette is constructed as described above, and when not in use, the shutter 8 slides in the direction of arrow a in the closed position #1 due to the bending reaction force of the arm 13, as shown by the solid line in FIG. The shutter plates 9 close the head insertion holes 5 to prevent dust from entering the case 3. At this time, as shown in FIG.
- Arm 1 of slit 17 is completely occluded by
3nl-1' Sliding amount Sa of shutter 8 is opened for the time being i
It becomes 11. Therefore, for the vertical height h1 of the arm 13 and the height h2 of the slit 17 in all cases B, h1≧
h2, the opening of the slit 17 on the arm 13 side can be closed by the arm 13 from the inside of the case 5, thereby preventing dust from entering the case 3 from the opening of the slit 17 on the arm 13 side. You can also do it. Next, when using the Fronpy disk, insert it into the Fronpy disk device, case 3
The shutter 8 is moved against the elasticity (bending reaction force) of the arm 13 to the first The opening position indicated by the dashed line in Figure VC1 is slid in the direction of the arrow, and both openings 11 of both shunter plates 9 are overlapped with the underside of both head insertion holes 5, and both head insertion holes 5 are opened. Then, a pair of magnetic heads (not shown) are inserted into the case 3 through both head insertion holes 5 and brought into contact with both the upper and lower recording surfaces of the floppy disk 4 to perform recording and reproduction on the floppy disk 4. Note that when the shutter 8 is opened, the plurality of bent portions 14a and 14b of the arm 13 are bent so as to resist elasticity and fold 1 as shown by the dashed line in FIG. ,that time,
The inclination node 15 has a plurality of bent portions 14a, 1. ! A stable bending reaction force is generated at ib, and bending damage at these bending points is prevented. Next, FIG. 4 shows a modified example, in which the arm 13 is constituted by only one approximately figure-7-shaped bent giaa. Next, FIG. 5 shows another modification, in which the arm 13 is formed by a strip 20 integrally extending from one end 8a of the connecting portion 10 of the shutter 8. In this case, the arm 13 can be integrally pressed into the shutter 8 when the shutter 8 is assembled using a thin sheet of metal or synthetic resin. Although the non-inventive embodiments have been described above, the present invention is not limited to the above embodiments, and various effective changes can be made based on the technical concept of the non-inventive invention. Also, uninventively, the floppy disc 4 shown in the above embodiment
The invention is not limited to cassettes of 70 to 70-inch discs using a cassette, but can be applied to various types of disk cassettes conveniently storing hard disks and other types of disk-shaped recording bodies. [Effects of the Invention] Since the present invention has the structure 5j as described above, the following effects are achieved. The spring for closing the shutter lid is integrally installed at one end of the metal shutter arm that makes up all the shutters, so that the shutter and arm can be assembled simultaneously to the entire case, unlike conventional methods.
There is no need to separately assemble the shutter closing spring and the shutter into the case, and the number of parts and assembly work for the disk cassette can be reduced. In particular, by assembling the shutter, arm, and entire case at the same time, compared to the conventional method of assembling the shutter-closing spring and Shimatsuta separately to the case, and then locking or connecting them to each other. Therefore, the assembly work time can be greatly shortened, and the mass productivity of disk cassettes can be significantly improved.

[Brief explanation of drawings]

The drawings show one embodiment of the invention.
The figure is a plan view of a floppy disk-cassette with main parts cut away, and Figure 2 is a side view taken in the direction of arrows U-N in Figure 1.
FIG. 3 is a perspective view showing a striped ivy, and FIGS. 4 and 5 are partially cutaway plan views of modified examples. 1, in the symbols used in the drawings, 6...
...This is a case. a e-fist・−・−− 6・・・・・・・ One end edge of the case floppy disk disk-shaped recording medium) One end arm of the head insertion hole shutter

Claims (1)

[Claims] a case in which a disk-shaped recording medium is rotatably housed;
A disk cassette is provided with a shutter that is slidably attached along one end edge of the case and opens and closes a head insertion hole of the case, and an arm that can be bent against elasticity is integrated at one end of the shutter. 1. A disk cassette, characterized in that the shutter is slidably biased to a closed position of the head insertion hole by the bending reaction force of the arm.