JPH0222461B2 - - Google Patents

Description

TECHNICAL FIELD The present invention relates to a magnetic disk device, and more particularly to a magnetic disk device having a magnetic disk attachment/detachment mechanism.

BACKGROUND ART In recent years, floppy disks (magnetic disks) have become popular as storage media for computers and the like, as they are advantageous over magnetic tapes in that they can be accessed randomly and at high speed.

Usually, magnetic disks are housed in a case to prevent damage, and cases made of flexible plastic and cases made of hard plastic are known. When hard plastic is used, an ejecting mechanism such as that used in a cassette tape recorder can be used, but the conventionally proposed disk ejecting mechanisms require a biasing means such as a spring to be provided inside the disk device. However, the disadvantage was that the structure was complicated.

Purpose The present invention has been made in view of the above points, and it is an object of the present invention to provide a magnetic disk device having a disk eject mechanism with a simple and inexpensive structure. In order to achieve the above objects, the present invention:
The disk cassette is ejected using the elastic force of a spring that closes the head window inside the floppy disk case.

Embodiments Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

FIG. 1 shows a disk cassette 1 used in the magnetic disk device of the present invention. A magnetic disk is housed in a hard plastic case 1', and a head window 2 is provided for accessing the magnetic disk housed therein, such as writing and reading information.
This head window 2 can be opened and closed by a shutter plate 3 to protect the disk.

This shutter plate 3 is normally closed by a biasing force such as a spring provided inside the case 1', but it is fixed to a shutter opening/closing band 5 provided on the side surface of the case 1' by means not shown. The shutter plate 3 can be opened by pushing the shutter opening/closing pawl 4 in the direction a in the figure. However, here the sign is 6
The hole shown by is a positioning hole for positioning the disk cassette within the magnetic disk device.

Next, FIG. 2 shows the structure of the magnetic disk device of the present invention.

The figure is a cross section of the disk cassette accommodating portion of the disk device, showing a state in which the disk cassette 1 has not been inserted to the normal position. The left and right inner surfaces of the housing part are formed into guide plates 9 and 10, and the guide plate 1 is located on the side where the shutter opening/closing claw 4 and the shutter opening/closing band 5 of the case 1' are provided.
A protruding pin 8 is provided which can engage with the shutter opening/closing pawl 4 when the disk cassette 1 of No. 0 is inserted into the housing section. Further, a positioning pin 7 is provided on the bottom surface 15 at the innermost part of the disk housing portion at a position where it can be engaged with the positioning hole 6 of the case 1' when the disk cassette is inserted. This positioning pin 7 is normally projected upward by a biasing member such as a spring, but it is designed so that it sinks into the bottom surface 15 in conjunction with the insertion of an eject button provided on the front panel of the magnetic disk device. It's summery.

In order to load the disk cassette 1 in the above configuration, the disk cassette 1 is pushed in the direction shown by b in FIG. As a result, first, the shutter opening/closing pawl 4 fixed to the shutter opening/closing band 5 of the case 1' engages with the pin 8 provided on the guide plate. Furthermore, disk cassette 1
As you push in, the shutter opening/closing claw 4 will be pushed in the direction indicated by a in Figure 1.
The shutter plate 3 interlocked with the shutter opening/closing claw 4 opens. When the disk cassette 1 is completely pushed in, the positioning pin 7 provided on the bottom surface 15 at the innermost part of the main part fits into the positioning hole 6 of the case 1', and the disk cassette 1 is fixed in the housing.

In order to eject the disk cassette 1, the positioning pin 7 is retracted into the bottom surface 15 by pressing the eject button provided on the front panel mentioned above. As a result, the fitting fixation between the positioning hole 6 and the positioning pin 7 is released, and the shutter opening/closing pawl 4 pushes the pin 8 due to the force of the spring provided in the case 1'. can be discharged from the storage section.

Next, FIG. 3 shows a second embodiment of the present invention. In the embodiment according to FIG. 3, the pin 8 is not mounted on the guide plate 10, but on the moving belt 12 which performs a folding movement along the deflection guide 13. An engaging member is provided at the tip of the moving belt 12 for engaging with the case 1' when the case 1' is inserted. If you adopt the above configuration,
The pin 8 provided on the moving belt 12 is moved in the direction c in FIG. Since the pushing distance of the disk cassette 1 is halved, the depth of the device can be shortened. In the above embodiments as well, the disk cassette is ejected by the elastic force of the spring within the case 1' when the positioning hole 6 and the positioning pin 7 are disengaged.

In the above description, the positioning pin 7 is provided on the bottom surface of the inner part of the housing, but the position of the positioning pin is not limited to this, and it goes without saying that it may be provided anywhere within the housing.

Effects As is clear from the above explanation, according to the present invention, a structure is adopted in which the disk cassette is ejected by the elastic force of the spring for closing the head window inside the case, so the structure is simple and inexpensive. A magnetic disk device having a magnetic disk eject mechanism can be provided.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the structure of a magnetic disk used in the present invention, and FIGS. 2 and 3 are schematic sectional views showing different embodiments of the present invention. 1...Disc cassette, 1'...Case, 2...Head window, 3...Shutter plate, 4...Shutter opening/closing claw, 6...Positioning hole, 7...Positioning pin, 8
... Pin, 9, 10... Guide plate, 12... Moving belt, 13... Deflection guide.

Claims (1)

[Claims] 1. In a magnetic disk device using a disk cassette in which the head window is normally closed by a spring inside the case, and the head window is opened during use by means of deforming the spring, a device for closing the head window inside the case is used. A magnetic disk device characterized in that the disk cassette is ejected by the elastic force of a spring.