JPH0326470B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a floppy disk disk cartridge rotatably containing a disk-shaped recording medium such as a magnetic disk.

Conventional configurations and their problems In recent years, there has been a remarkable increase in the entry of floppy disks into the magnetic recording field.In particular, recently there have been many types of floppy disks that are protected and housed in hard case cartridges to make them easier to use. It has started to be used.

Hereinafter, the above-mentioned disk cartridge will be explained with reference to FIGS. 1 to 4.

In FIG. 1, a slider 1 is fitted into a slider sliding groove 4 provided in a lower case 2 and an upper case 3, and is urged by a spring 5 at a slider spring engaging portion 6 to follow the slider sliding groove 4. It performs a reciprocating sliding motion. One tip 7 of the slider 1 engages with a part of the shutter plate 8, and when a load in the direction of arrow 10 is applied to the protrusion 9 provided on the other end of the slider 1, the slider 1 The shutter plate 8 moves in the direction of arrow 10 and rotates counterclockwise 11 to open the head window 12.
becomes open. In this state, upper case 3
It becomes possible to record and reproduce information on and from a disk-shaped recording medium 13 rotatably housed in a disk cartridge consisting of a combination of a lower case 2 and a lower case 2. Here, the slider 1 is in the shape of a thin, flexible band, and reciprocating sliding motion is performed along the straight and curved portions of the slider sliding groove 4.

FIG. 2 shows the head window 12 in a closed state. Here, 14 indicates a straight line portion of the slider sliding groove 4, and 15 indicates a curved portion.

By the way, when assembling the upper and lower cases 3 and 2 by fitting the flexible slider 1 into the lower case 2, the slider sliding groove 4 of the slider 1
The independence of the slider 1 is extremely important, and if the slider 1 is extremely tilted from the normal state shown in Fig. 3a to the state indicated by 1' as shown in Fig. A serious drawback occurs in that the tilted slider 1 is pushed down from above, and the slider 1 comes off the slider sliding groove 4 when the upper and lower cases 3 and 2 are assembled. Here, FIG. 3 shows a cross section taken along line A-A' in FIG. In FIG. 3, φ ₁ is the inclination angle of the slider sliding groove 4 of the slider 1. In particular, since the spring 5 biases the slider 1 at the straight line portion 14 of the slider sliding groove 4 in a direction substantially parallel to the slider sliding groove 4, the curved portion 1 of the slider sliding groove 4
5, the slider 1 has a very large φ ₁ and easily comes off from the slider sliding groove 4.

As described above, the conventional disk cartridge has the problem that the slider tends to pop out, which causes defects when assembling the upper and lower cases, resulting in a low yield.

FIG. 4 shows a view seen from the direction of arrow B in FIG.

Purpose of the Invention The present invention has been made in view of the above-mentioned problems in the prior art. The object of the present invention is to provide a disk cartridge having a structure that reduces case assembly defects caused by the slider protruding from the moving groove.

Structure of the Invention In order to achieve this object, the disk cartridge of the present invention has a slider for making the slider independent, facing the inner surface of the lower case along the guide groove, in the vicinity of the engagement portion of the slider with the shutter plate. It has a configuration in which one or more protrusions thicker than the wall thickness are provided on the outer peripheral surface side of the slider.

DESCRIPTION OF THE EMBODIMENTS An embodiment according to the present invention will be described with reference to FIGS. 5 to 7, with the same numbers assigned to the same parts as in the conventional example. First, as shown in FIG. 5, convex portions 16 are provided on both sides of the slider 1 sandwiching the shutter plate 8. Here, the convex portion 16 may be provided only on one side. Figure 6 shows the cross section along line C-C' in Figure 5.
Here, the inclination angle φ ₂ is smaller than φ ₁ shown in FIG. 3 due to the provision of the convex portion 16, and the slider 1 becomes stable with good self-reliance and is difficult to protrude from the slider sliding groove 4.

Next, in FIG. 7 showing another embodiment, a self-supporting auxiliary wall 18 is provided parallel to the slider sliding groove 4 and spaced apart by the thickness 17 of the convex part of the slider, protruding from the inner surface of the lower case 2. . Figure 8 is the 7th
The figure shows a cross section taken along the line DD', in which the angle of inclination φ ₃ is further smaller than the angle of inclination φ ₂ described above, and the independence of the slider 1 is further improved. Here, the self-supporting auxiliary wall 18 is provided over a local area or the entire area of the convex sliding area.

Effects of the Invention According to the present invention, the slider is provided with a convex portion thicker than the thickness of the slider in order to make the slider self-supporting, in the vicinity of the engaging portion of the slider with the shutter plate, facing the inner surface of the lower case along the guide groove. Since it is provided on the outer peripheral surface of the slider, it is possible to ensure that the slider stands on its own, greatly reducing the risk of the slider protruding from the disk cartridge, and significantly reducing the defective rate of upper and lower case assembly. be able to.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing a conventional disc cartridge; FIG. 2 is a perspective view showing the head window of the disc cartridge in a closed state;
Figures 3a and b are three-dimensional and two-dimensional views of the A-A' section in Figure 2, Figure 4 is an enlarged perspective view of the main part seen from the direction of arrow B in Figure 2, and Figure 5 is a A perspective view of a main part showing an embodiment of a disk cartridge according to the present invention, FIGS. 6a and 6b are three-dimensional and planar views of the C-C' cross section of FIG. 5, and FIG. FIGS. 8a and 8b are perspective views of main parts showing another embodiment of the present invention. FIGS.

Claims (1)

[Scope of Claims] 1. An upper case and a lower case provided with a head window into which a magnetic head for recording or reproducing information can be inserted into a disk-shaped recording medium rotatably built into the disk-shaped recording medium. , a shutter plate disposed on each inner surface of the upper case and the lower case to selectively open and close the head window; a flexible slider whose one end is engaged with a portion of the shutter plate; and a spring disposed within the upper case and the lower case, whose one end engages with the other end of the slider to bias the slider. a convex portion thicker than the thickness of the slider in the vicinity of the engaging portion of the slider with the shutter plate so as to face the inner surface of the lower case along the guide groove and make the slider independent; A disk cartridge is characterized in that one or more disk cartridges are provided on the outer peripheral surface of a slider. 2. A patent characterized in that a self-supporting auxiliary wall is provided at a position parallel to the sliding groove of the slider and separated by the thickness of the convex part and protruding from the inner surface of the case over a local area or the entire area of the convex sliding area. A disk cartridge according to claim 1.