JPS58203680A - Disk cassette - Google Patents

Abstract

PURPOSE:To obtain the automatic closing mechanism of a head window whose member for opening and closing and spring joints smoothly and securely with each other, by hooking one end of the spring to the small hole of the hooking part located at the end part of a member for opening and closing a shutter so that the spring always pushes up the member for opening and closing. CONSTITUTION:The figure shows a driving part for opening a shutter consisting of a case 6 of one side, a member 9 for opening and closing the shutter and a spring 11. The spring 11 softly binds a hooking part 14 by its one end, makes a smooth section in which the spring 11 rotates around a small hole 15 and securely joints with the member 9 for opening and closing the shutter so that it does not come off. Since the other end of the spring 11 is inserted to a dented part 16, the end part does not come off due to vibration, etc., because of the extensible force of the spring 11. As a result, fixed force is always given to the member 9 for opening and closing the shutter so that a window is always closed by the shutter when not used.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a disk cassette having a flexible magnetic disk therein, and particularly relates to its shutter opening/closing mechanism.6 Conventional flexible magnetic disks are housed in a case having an opening such as a head window. Ori.

Therefore, dust enters the case through the opening and easily adheres to the magnetic disk, and when the opening is held with a finger, fingerprints tend to adhere to the magnetic disk.

Dropouts are likely to occur in the signal reproduced from the magnetic disk, so the case must be handled with great care.

In order to prevent the intrusion of dust and the adhesion of fingers and prints into the case, the disk cassettes shown in FIGS. 1(α), (4>, and (C)) have been proposed by the inventors of the present invention. This disk cassette is composed of an outer case 1.6.shutters 3, 8.disk 4.shutter opening/closing member 9.spring 11.

The shutters 3 and 8 are rotatably mounted inside the cases 1 and 6, and completely cover the head windows 2 and 7 when not in use. The disk 4 has a hub 5'fr at its center, and when the disk 4 is driven to rotate, the hub 5 receives the driving force and at the same time functions to accurately center the disk 4. The shutter opening/closing member 9 has one end attached to the shutter 3°8
The other end of the shutter opening/closing member 9, which is connected to the outer periphery f and opens and closes the shutter 3.8, protrudes outward from the case 1.6, but is flush with the side surface of the case 1.6. Alternatively, it has a protrusion 10 that is recessed from the side. There is a recess 15t on the back side of the protrusion 10, and a spring 11
One end of the spring 11 is inserted into the recess 15, and the other end of the spring 11 is pressed against the inner corner of the case 6. Figure 2 is similar to Figure 1 (c
) when viewed from the opposite direction, showing a state in which one end of the spring 11 is inserted into the recess 13 and pushes up the shutter opening/closing member 9. When the disk cassette is loaded into a disk drive device (not shown), as the disk cassette moves, the pawl 14 provided on the disk drive device moves, and as the disk cassette moves, the claw 14 provided on the side of the disk cassette moves.
As a guide 12'ii, the projection 10 is pushed down, the shutter opening/closing member 9 slides, the shutter 6.8 is rotated, and the head windows 2, 7 are opened.

On the other hand, when the disk drive device is removed from the disk drive device, the spring 11 stretches and pushes up the shutter opening/closing member 9, rotating the shutter 6.8 and opening the head window 2.7.

As shown in FIG. 2, in this example, only one end of the nokune 11 was inserted into the recess 13, so the nokune 11 easily came off from the recess 16, leaving the shutter 6°8 free. Shutter 6.8 opens during shooting,
There is a drawback that the head window 2.7 remains open when the disc drive unit is removed from the disc drive unit. worn. Since the other end of the spring 11 was pressed against the inner corner of the case 1.6, the end of the spring 11 was pushed into the inner corner of the case 1.6 due to vibrations during opening and closing of the shutter 5.8 and during transportation. The disadvantage is that the entire spring 11 plays in the case 1.6 by moving from the corner.

The object of the present invention is to eliminate the drawbacks of the above-mentioned techniques.

To provide a diffuser cover tractor having an automatic shutter closing mechanism for a head window in which a shutter opening/closing member 9 and a spring 11 are smoothly and reliably connected.

In order to achieve the above object, two disc cassettes according to the present invention have a drawing part provided at the end of the shutter opening/closing member on the opposite side of the protrusion, that is, towards the inside of the case, and a small hole in the hook part. When the case is opened, one end of the spring engages with the small hole, the spring always pushes up the shutter opening/closing member via the hook, and the other end of the spring is inserted into a recess provided in the inner corner of the case.

An embodiment of the present invention will be described below with reference to FIG. Third
The figure is a partial perspective view of the disk cassette. Other parts of the disk cassette not shown in FIG. 3 are the same as those already described in detail, and therefore will not be described here. Figure 3 shows one side of the case 6° shutter opening/closing member 9. and a spring 11 for opening the shutter 6.8. At the end of the shutter opening/closing member 9, a tongue-shaped hook part 14 is formed on the inside of the case 6 at right angles to the shutter opening/closing member 9. The hook part 14 has a small hole 15, and one end of the spring 11 is connected to the small hole 15.The reason for the U-shaped shape is that it is bent into a square shape, and the hook part is gently inserted, so that the spring 11 fits into the small hole 15.
A smooth joint that rotates around the spring 11
6. The shutter opening/closing member 9 is securely connected to the shutter opening/closing member 9 to prevent it from coming off due to force majeure. Spring 11
The other end of the spring 11 is inserted into a recess 16 provided inside the case 6 at a corner, and the end of the spring 11 is pressed against the recess 16 by the force of the spring 11 extending, so that the end may be pushed into the recess by vibration or the like. 16, a constant stretching force of the spring 11 is always applied to the shutter opening/closing member 9, and the window 2.7 is always closed by the shutter 6.8 when not in use.

FIG. 4 shows a second embodiment of the present invention, in which a protrusion 10 and a hook 14 are provided at different positions at the end of the shutter opening/closing member 9.

The spring 11 can be rotated smoothly through the small hole 15 made in the hook 14, and the end of the spring 11 is bent in a square shape, so the spring 11 does not come off the hook 14. By providing the protrusion 10 and the position of the hook 14 at a different position from the hook 14, which is less likely to cause full pressure, the position design of the protrusion 10 and the hook 14 can be performed independently of each other, increasing the degree of freedom in design and manufacture.

FIG. 5 shows a third embodiment of the present invention, in which a small hole 1 is provided in a bow 1 hook part 14 provided at the end of the shutter opening/closing member 9.
Open 5 holes and cut 17 slits connecting the small hole 15 and the outside. The width of the slit 17 is narrower than the wire diameter of the spring 110. By making the shutter opening/closing member 9 of plastic or the like, the hook portion 14 has elasticity. Push it wide and open the small hole 15. Even if the end of the spring 11 is closed in the shape of a mouth, it can be easily connected. Also.

The force of the spring 110 is applied in the upward longitudinal direction of the shutter opening/closing member 9 and in the 10 directions of the protrusion at right angles thereto. If the spring 11 is within the range connecting the right angle direction (the direction in which the hook portion 14 protrudes), the spring 11 will not come out through the small hole 15. It is understood that this embodiment dramatically improves the ease of assembling the spring 11 and the shutter opening/closing member 9.

As described in detail above, according to the present invention, the connection between the shutter opening/closing member and the spring can be achieved smoothly and reliably, and the semi-fixation of the bent spring and the case can be achieved with a simple structure and is also reliable. This dramatically improves the ease of assembly when assembling the spring into the case, and the shutter closes reliably.

This has the effect of increasing the reliability of dustproofing and fingerprintproofing.

[Brief explanation of the drawing]

Fig. 1 (α) and (h) I <c) are assembled perspective views of the disc cassette, Fig. 2 is a partial sectional view of the disc cassette, and Fig. 3 shows a first embodiment of the disc cassette of the present invention. FIG. 4 is a partial perspective view showing a second embodiment of the disk cassette of the present invention, and FIG. 5 is a partial perspective view showing a third embodiment of the disk cassette of the present invention. 1.6; Case 3, 8; Head window 4
Disc 9; Shutter opening/closing member 11; Spring 14; Hook portion 15; Small hole 16; Kubobe Sai 2 Figure 3 1451 Sai 50 Hitachi City, Higashitagamachi-chome 1-1 Hitachi, Ltd. Taga Factory 0 Inventor Katsuhiro Shiobara 1-1 Higashitaga-cho-chome, Hitachi City Hitachi, Ltd. Taga Factory Internal Procedures Amendment (Method) Case Description 1982 Patent Application No. 205344 Title of Invention: Disc Cassette Amendment Person 751θ Seal Ceremony! 11 Tachi Seisakusho Representative 6 -:, ■ Shigeyo Katsu
Address: 5-1 Marunouchi-chome, Chiyoda-ku, Tokyo 100, Japan 1st i'/- ffl telephone
Higashijou, 435-4221 Subject of amendment Application and specification

Claims (6)

[Claims] (1) A disk, a case that holds the disk in a rotatable state, a head window formed in the case, and a space between the disk and the case that is coaxial with the (b) axis of rotation of the disk. a shutter rotatably disposed so as to cover the hen door window, one end of which rests on the outer edge of the shutter, and the other end of which protrudes outward from the case, but protrudes beyond the case; A shutter opening/closing member is provided with a protrusion for opening that is not attached to the case, and a tongue-shaped hook protruding inwardly of the case at the other end, one end of which is hooked to the hook, and the other end of the shutter opening/closing member that is pressed against the inside of the case. A disk cassette comprising a spring that constantly pushes up the shutter opening/closing member. (2) The disk cassette according to claim 1, wherein the other end of the spring is inserted into a recess provided in an inner corner of the case. (3) The protrusion and the hook are located at one end of the shutter opening/closing member and protrude in opposite directions at symmetrical positions.
2. Disc cassette according to item 1 or 2. (4) The protrusion and the hook are located at one end of the shutter opening/closing member and protrude in opposite directions at different positions.
2. Disc cassette according to item 1 or 2. (5) A small hole is provided at the center of the hook part, and one end of the spring is moored to the small hole.
The disk cassette according to item 2, item 3, or item 4. (6) The disk cassette according to claim 1, 2, 3, 4, or 5, wherein the hook portion is provided with a slit that connects the small hole with the outside. .