JPH04103340U - flexible magnetic disk cartridge - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a highly reliable flexible magnetic disk that does not cause disk rotation failure or disk attachment/detachment failure even after repeated attachment and detachment to a disk drive device. [Structure] In a flexible magnetic disk cartridge, a hub fixed to the center of a surface of a flexible magnetic disk 108 is provided with a centering leaf spring having a function of aligning the center of the hub with the center of a spindle shaft 111 of a disk drive device. The portion of the centering leaf spring 7 from the tip on the disk surface side to 60% of the total length of the centering leaf spring is a surface parallel to the disk center line which is parallel to the normal to the surface of the flexible magnetic disk 108, and the remaining portion The portion is at an angle of 5° to the outer circumferential side of the disk 108 with respect to this disk center line.
It is composed of surfaces with an inclination within a range of 10 degrees.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to flexible magnetic disk cartridges, especially disk drive equipment. This relates to smooth rotation of the disk during insertion.

0002

[Conventional technology]

With the rapid spread of personal computers, flexible storage devices are becoming popular as external storage devices. The use of flexible magnetic disks has become widespread, and Along with miniaturization, the size of flexible magnetic disks has also increased from 8” (inch) to 5.2 5", 3.5", and recently 2" flexible magnetic disks. Airplanes equipped with a screen are also beginning to be adopted. This 2” flexible magnetic disk is 3.5 ``The so-called hard cartridge type represented by the microfloppy disk. It is a flexible magnetic disk, but the 3.5” disk differs in part composition and material. are different.

0003 FIG. 4 is a diagram showing an example of the structure of a conventional 2-inch floppy disk. In Figure 4 A hub 105 equipped with a centering leaf spring 107 is attached to a flexible magnetic A centering leaf spring 107 is attached to the center hole of the disk 108 from one side (back side). Insert the hub 105 into the protrusion of the hub 105 from the other side (surface) direction of the disk surface. 104 and an upper shell with a liner 106 for removing dust on the disk. 101 and the lower shell 102. In addition, the reference numeral 110 in the figure 109 is the data window section, 109 is the shutter lock claw spring, and 103 is the shutter lock claw spring. is a shutter that opens and closes the data window section 110.

0004

[Problem that the idea aims to solve]

The aforementioned 2” disc has new features that were not seen on the 3.5” disc. A problem has arisen. For example, in a 2" flexible magnetic disk, a centering leaf spring is used. 105 is attached to a hub 105 fixed to the center of the disk surface 108. , when inserting the cartridge 100 into the disk drive, the center of the hub 105 and the drive It has a function to align the center of the spindle axis on the equipment side, so it can be used with 2” floppy disks. It is one of the particularly important parts of the disk. This centering leaf spring 105 The performance required is that the cartridge 100 is repeatedly installed and removed from the disk drive device. However, it is possible to maintain the original centering function while being stably attached to the hub. Ru.

[0005] Normally, the centering leaf spring 107 is located at the center of the disk, as shown in FIGS. 5 and 6. It is attached to hub 105 parallel to line 114. This centering spring 107 is shown in FIG. Along with the contact surface 115 with the two spindle shafts 111 on the hub 105 side shown in FIG. While the disk is rotating, it comes into contact with the spindle shaft 111 and the center of the hub is inserted into the spindle shaft 111. It has the ability to align with the mind.

[0006] In the conventional centering leaf spring 107, the centering leaf spring 107 is attached to the disk surface 108. A hub 105 is installed in a direction perpendicular to the drive unit of the cartridge 100. When inserting, the disk 108 is perpendicular to the spindle shaft 111 from the insertion slot. Because of the closeness, the centering leaf spring 107 moves the centering leaf spring 107 during the first contact of the spindle shaft 111. A large force is applied in the direction of pushing up the centering leaf spring 107 fixed to the plate 105. I found out that I will be joining. Therefore, the flexible magnetic disk is repeatedly inserted and removed. It was found that there was a danger that the centering leaf spring would come off the hub 105.

[0007] That is, as the number of times the disk is used increases, the centering leaf spring 107 105, and when the disk 108 rotates, the part on the drive device side If the product comes into contact with the product, it may make abnormal noises, or rotation abnormalities may interfere with recording/playback. Alternatively, if the centering leaf spring 107 lifts up too much, the rotation of the disc may be If the cartridge 100 stops suddenly or gets caught in the insertion slot when taking out the cartridge 100, This avoids the risk of the centering leaf spring 107 coming off and damaging internal parts of the drive device. I'm reading. Therefore, it is possible to have a highly reliable flap that does not cause defects even under complicated usage conditions. In the current situation where flexible magnetic disks are in demand, flexible magnetic disks are Improving the reliability of disk components is an extremely important issue.

[0008] Therefore, the technical problem of this invention is that even if the disk drive is repeatedly attached and detached, the Highly reliable flex that does not cause problems with disk rotation or attachment/detachment. The purpose of the present invention is to provide flexible magnetic disks.

[0009]

[Means to solve the problem]

According to the present invention, the hub fixed to the center of the flexible magnetic disk surface has a Has the function of aligning the center of the hub with the center of the spindle axis of the disk drive device. In a flexible magnetic disk cartridge equipped with a leaf spring for centering, The entire length of the centering leaf spring from the tip of the centering leaf spring on the flexible magnetic disk surface side. up to 60% of the disk is parallel to the normal to the flexible magnetic disk surface. The surface is parallel to the center line of the disc, and the remaining part is flexible to the center line of the disc. Consists of a surface that slopes in the range of 5° to 10° toward the outer circumference of the bull magnetic disk. A flexible magnetic disk cartridge is obtained. .

0010

[Effect]

In the flexible magnetic disk cartridge of this invention, the disk drive The centering leaf spring surface on the side where the spindle shaft is inserted is aligned with the disk center line. It has an inclination in the range of 5° to 10° toward the outer circumferential side of the flexible magnetic disk. The spindle of the flexible magnetic disk cartridge is When mounting on the spindle shaft, the centering plate spring surface should be aligned with the spindle shaft in the direction along the insertion direction. Since the force applied from the center is deflected horizontally, the load on the centering leaf spring is reduced and will not come off the hub.

[0011]

【Example】

Examples of the present invention will be described below. Figure 1 shows a frame according to an embodiment of the present invention. Shows a flexible magnetic disk cartridge installed in a disk drive. FIG. In FIG. 1, a flexible magnetic disk according to an embodiment of the present invention is shown. The cartridge has a conventional frame shown in Fig. 4, except for the centering leaf spring 7 and the hub 5. It has the same structure as a flexible magnetic disk cartridge.

0012 2 is a sectional view showing the main part of FIG. 1, and FIG. 3 is a sectional view of the centering plate shown in FIGS. 1 and 2. FIG. As shown in Figures 1 and 2, the lower part of the center hole 5b of the hub 5 is , a tapered surface 5a is formed such that its cross section gradually becomes wider. In addition, as shown in Fig. 3, the centering leaf spring 7 is The part up to 1.5mm remains parallel to the center line 114 of the disc as before. so that it comes into contact with the spindle shaft 111 while the disk is rotating, and the remaining part is attached to the disk. θ is in the range of 5° to 10° toward the outside of the disc with respect to the centerline 114 of the disc. It is made tilted around the edges.

[0013] Returning to FIGS. 1 and 2, by attaching the centering leaf spring 7 to the hub 5, the centering The lower half of the release leaf spring 7 is located further away from the center of the spindle shaft 111. Therefore, the contact that acts to push up the centering leaf spring 7 when inserting the cartridge The process from insertion to movement to the disc setting position is smooth. Ru. In addition, a flexible magnetic disk cartridge is fixed in the disk drive. After the centering plate spring 7 is rotated, the upper half of the centering leaf spring 7 is rotated. Since it continues to be in contact with the spindle shaft 111 even when the shaft is moved, the centering function is maintained.

[0014] Therefore, the centering of the flexible magnetic disk cartridge according to the embodiment of the present invention is The leaf spring 7 and the hub 5 can be used in a flexible magnetic disk cartridge. This reduces the load on the centering leaf spring 7 when inserting the cartridge into the drive device. As a result, the installation of the centering leaf spring 7 becomes stable, and the centering function is always maintained. A highly reliable flexible magnetic disk cartridge that can be maintained is obtained.

[0015] The flexible magnetic disk cartridge according to the embodiment of the present invention will be explained below. I will explain in detail. (Example 1) A hub 5 equipped with a centering leaf spring 7 in the internal structure of the cartridge shown in FIG. 1 and 2, the inclination angle θ with respect to the center line 114 of the disk is = 5°, and a 2” floppy disk with a recording capacity (unformatted) of 1MB. 100 sheets were produced and used as samples.

[0016] (Example 2) A hub 5 equipped with a centering leaf spring 7 in the internal structure of the cartridge shown in FIG. For the shape shown in FIGS. 1 and 2, the inclination angle θ= 2” floppy disk with a recording capacity (unformatted) of 1 MB. 100 sheets were produced and used as samples.

[0017] (Comparative example 1) A hub 5 equipped with a centering leaf spring 7 in the internal structure of the cartridge shown in FIG. For the shape shown in FIGS. 1 and 2, the inclination angle θ= A 2” floppy disk with a recording capacity (unformatted) of 1MB 100 sheets were prepared and used as samples.

[0018] (Comparative example 2) A hub 5 equipped with a centering leaf spring 7 in the internal structure of the cartridge shown in FIG. For the shape shown in FIGS. 1 and 2, the inclination angle θ= 2” floppy disk with a recording capacity (unformatted) of 1MB. 100 sheets were produced and used as samples.

[0019] (Comparative example 3) A hub equipped with a centering leaf spring in the internal structure of the cartridge shown in Figure 6. The shape shown in FIG. 5, which has been used for a long time, is It was manufactured with a tilt angle of θ = 3°, and a 2” floppy disk with a recording capacity (unformatted) of 1MB. 100 P disks were prepared and used as samples.

[0020] For each 100 samples in each of the above examples, the process of attaching and detaching them to the disk drive device was repeated 10,000 times. Table 1 shows the situation during the subsequent rotation of the disk.

[0021]

[Table 1]

[0022] As can be seen from Table 1, the flexible magnetic disks according to Examples 1 and 2 of the present invention According to the disk cartridge, the disk remains intact even if it is repeatedly attached to and detached from the disk drive. Highly reliable flexible magnetic disk cart that does not cause rotational defects. Ridge can be provided.

[0023] In addition, in the embodiment of the present invention described above, a 2” floppy disk will be explained. However, the present invention is not limited to 2” microfloppy disks. , the center of the hub and the disk are attached to the hub glued to the inner circumference of the flexible magnetic disk surface. Equipped with a centering leaf spring that has the function of aligning the center of the spindle axis of the drive unit. If a flexible magnetic disk is used, the same effect as the embodiment of the present invention can be obtained. It is not limited to the type of flexible magnetic disk.

[0024]

[Effect of the idea]

As explained above, according to the present invention, it is possible to repeatedly attach and detach the disk drive device. Excellent reliability, with no disk rotation failure or disk attachment/detachment failure A flexible magnetic disk cartridge can be provided.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a state in which a flexible magnetic disk cartridge according to an embodiment of the present invention is installed in a disk drive device.

FIG. 2 is a sectional view showing the main part of FIG. 1;

3 is a perspective view showing a centering leaf spring of the flexible magnetic disk cartridge of FIGS. 1 and 2; FIG.

FIG. 4 is an exploded perspective view showing a structural example of a conventional 2-inch floppy disk cartridge.

FIG. 5 is a sectional view showing the configuration of main parts when the floppy disk cartridge of FIG. 4 is installed in a disk drive device.

FIG. 6 is a plan view of the main part of FIG. 5;

[Explanation of symbols]

5 hub 5a Tapered surface 5b Central hole 7 Centering leaf spring 100 cartridges 101 Upper shell 102 Lower shell 103 Shutter 104 ring 105 Hub 105a Projection part 106 Liner for dust removal 107 Centering leaf spring 108 Flexible magnetic disk 108a central hole 109 Shutter lock pawl spring 110 Data window section 111 Spindle axis 112 Magnetic recording surface 113 Spindle surface that supports the hub 114 Disc center line 115 Contact surface

Claims (1)

[Scope of utility model registration request] Claim 1: A flexible magnetic disk cartridge comprising, on a hub fixed to the center of a flexible magnetic disk surface, a centering leaf spring having a function of aligning the center of the hub with the center of a spindle shaft of a disk drive device. , the portion from the tip of the centering leaf spring on the flexible magnetic disk surface side to 60% of the total length of the centering leaf spring is a plane parallel to the disk center line that is parallel to the normal to the flexible magnetic disk surface. A flexible magnetic disk cartridge characterized in that the remaining portion is constituted by a surface inclined at an angle of 5° to 10° toward the outer circumferential side of the flexible magnetic disk with respect to the disk centerline.