JP2599845Y2 - Composite magnetic disk device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic disk drive such as a personal computer and a word processor, and more particularly to a composite magnetic disk drive having two magnetic disk drives.

[0002]

2. Description of the Related Art As is well known, a so-called magnetic disk device is used for recording information on a floppy disk composed of a flexible rotating magnetic disk or for reading recorded information. 8 inch, 5.25 inch,
Since there are a plurality of types of disks such as 3.5 inches, a usable floppy disk is specified by the magnetic disk device.

In recent years, along with the development of OA equipment, a magnetic disk device that reads system software such as a control program and sends the program to a CPU of the equipment body, and stores and saves data such as created documents. A structure in which a magnetic disk device is assembled vertically and has the same usable floppy disk size, or a composite magnetic disk device in which a plurality of read / write magnetic disk devices with different usable floppy disk sizes are integrated vertically. Has been proposed.

For example, as shown in Japanese Patent Application Laid-Open No. 3-165389, in a conventional composite magnetic disk drive,
Generally, a structure in which two magnetic disk devices manufactured in independent processes are housed in a common housing is adopted. However, if such a structure is adopted, the overall external dimensions of the composite magnetic disk device are increased, and the OA is increased. It becomes difficult to secure a space to be incorporated in equipment and the like.

In the past, attempts have been made to reduce the size of a composite magnetic disk device as shown in FIGS. That is, the illustrated example has a structure in which a 3.5-inch magnetic disk device is mounted on the upper portion of the 5-inch magnetic disk device, and the lower 5-inch magnetic disk device 50 is mounted.
Are the left and right side frames 51 and the main frame 52
And various sub-frames 53 and various control units, electronic components, and mechanical units. In addition, on the upper surface of the side frame 51, mounting pieces 54 with screw holes bent inward are provided at front and rear positions.

The 3.5-inch magnetic disk drive 55 is provided with a screw 5 in advance on a mounting plate 56 which is formed in the same size and shape as the frame of the 5-inch magnetic disk drive 50.
7, and the whole is assembled by fixing the mounting plate 56 to the mounting piece 54 with screws 58.

[0007]

However, in the structure of the composite magnetic disk drive shown in FIGS.
Even if the unique thickness of the 5-inch magnetic disk drive 55 and the 5-inch magnetic disk drive 50 is reduced as much as possible, the height h
In order to assemble the 3.5-inch magnetic disk device 55 into the 5-inch magnetic disk device 50, a height dimension corresponding to the thickness t of the mounting plate 56 is required, and the height of the entire device is reduced. The reduction had its own limits.

A 3.5-inch magnetic disk drive 5
When assembling the magnetic disk device 50 for 5 and 5 inches,
When the screw 58 is tightened to the mounting piece 54, the side frame 51 is deformed under stress by the same screw tightening torque,
Since distortion occurs in the main frame 52 and the sub-frame 53, the adjustment state of each of the 3.5-inch magnetic disk devices 55 and the 5-inch magnetic disk device 50 that has been adjusted in advance changes, and a predetermined adjustment value is obtained. There was a problem that could not be obtained.

SUMMARY OF THE INVENTION In view of the above-mentioned problems of the conventional composite magnetic disk drive, an object of the present invention is to reduce the overall external dimensions and change the adjustment state of a plurality of functionally independent magnetic disk drives at the time of total assembly. There is no magnetic disk drive to get.

[0010]

In order to achieve this object, the present invention is directed to a composite magnetic disk drive in which a second magnetic disk drive is fixedly stacked on a first magnetic disk drive. The present invention proposes a composite magnetic disk device in which a mounting plate is fixed to the magnetic disk device described above, and the mounting plate is mounted on four corner mounting pieces formed on a subframe of the first magnetic disk device.

[0011]

According to the composite magnetic disk drive of the present invention, the second
Since the mounting plate is mounted on the mounting pieces at the four corners of the subframe of the first magnetic disk device, the mounting plate can absorb the screw tightening torque. Further, it is possible to prevent the side frame and the main frame of the first magnetic disk drive from being distorted.

In the magnetic disk drive of the present invention, the mounting plate is used to assemble a plurality of magnetic disk drives and is directly mounted on the sub-frame of the first magnetic disk drive. Reduction in height dimension can be realized.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an embodiment of the present invention; FIG.

FIG. 1 shows a 5-inch magnetic disk drive 2 (first magnetic disk drive) of the composite magnetic disk drive of the present invention, showing a state in which the mounting plate is removed. Is mounted with a common front bezel 1 having a 3.5-inch floppy disk insertion port and a 5-inch floppy disk insertion port formed vertically.

The 5-inch magnetic disk drive 2 has a frame composed of left and right side frames 3 and 4, a bottom main frame 5, and a top sub-frame 6. The main frame 5 and the sub-frame 6 In
Various printed circuit boards 7, electronic components, and the like are fixed.

A 5-inch floppy disk 60 can be inserted into the insertion opening of the front bezel 1, and the 5-inch magnetic disk device 2 has a chucking mechanism 8 for holding the floppy disk 60 at a predetermined position, a magnetic head And a head sliding mechanism 11 for moving the head 10 in the direction of arrow B toward the center of the magnetic disk.

The head section 10 has an upper head 12 and a lower head (not shown) whose rear ends are connected by a leaf spring 13. The upper head 12 is a torsion spring hooked on the upper part. The upper carriage 12 is urged downward at 14, and a projection formed on the side of the upper head 12 engages with the upper surface of a second swing arm described later. Can be turned up and down in conjunction with the operation of.

A head sliding mechanism 11 for moving the head unit 10 in the front-rear direction includes a traveling member 17 engaged with a spiral groove of a lead screw 16 of a stepping motor 15.
And a traveling guide member 19 that is slidably attached to the guide shaft 18 back and forth.

The chucking mechanism 8 includes a first swing arm 23 that vertically rotates in conjunction with a slide operation of an eject lever 31 to which an eject button 20 is fixed at a tip, and is linked to the first swing arm 23. And a second swing arm 24 that rotates vertically.
The first swing arm 23 and the second swing arm 24 are urged upward by coil springs 25 and 26. And the first swing arm 2
An operating pin 22 is fixed to the rear end of the cam 3, and the operating pin 22 is elastically contacted with the cam surface of the inclined cam 21 integrated with the eject lever 31. Therefore, when the operating pin 22 is moved up and down with the movement of the tilt cam 21, the first swing arm 23 and the second swing arm 24 are turned up and down.

The 5 inch magnetic disk drive 2
Is provided with an index hole detection sensor 27, which detects the index hole 60a of the inserted 5-inch floppy disk 60.
Is detected.

At the four corners of the subframe 6 of the 5-inch magnetic disk drive 2, mounting pieces 28 to which a 3.5-inch magnetic disk drive 40 described later can be mounted are bent. The mounting piece 28 includes a chucking mechanism 8, a head unit 10, and a head sliding mechanism 11 on the upper surface of the sub-frame 6 of the 5-inch magnetic disk device 2.
The four corners of the sub-frame are bent vertically upward, and the upper end thereof is bent horizontally so as not to interfere with the mechanical parts such as the above, and a screw hole 28a is formed in the upper end surface.

The 5-inch magnetic disk drive 2
The sub-frame 6 and the main frame 5 are formed with detection holes 34 penetrating vertically. In other words, these detection holes 34 are located on the outer peripheral side of the spindle motor 30 and are connected to a 3.5-inch magnetic disk device 4 described later.
It is at a position corresponding to the position of the output detection terminal unit 45 for detecting and adjusting the output waveform of 0.

FIG. 2 shows a state in which a magnetic disk drive for a 3.5-inch mounting plate is mounted, FIG. 3 shows a main part of the same mounting state, and FIG. 4 shows a magnetic disk for a 3.5-inch mounted on a mounting plate. Each of the figures shows a state where the apparatus is viewed from below.

That is, the 3.5-inch magnetic disk device 40 (the second magnetic disk device) has the mounting plate 61.
The mounting plate 61 is attached to the sub-frame 6.
Is mounted on the above-described mounting piece 28.

More specifically, as shown in FIG. 4, a punching portion 62 for mounting the 3.5-inch magnetic disk device 40 for mounting the 3.5-inch magnetic disk device 40 and the mounting plate 61 is shown in FIG. Left and right center lines L ₃
With respect to the center line L ₅ of the left and right mounting plates 61, are made eccentric by the distance m away from the output detecting terminal unit 45.

Continuing, the punched portion 62 with the front surface of the mounting plate 61 opened has an opening area slightly larger than the outer shape of the 3.5-inch magnetic disk device 40, and the side of the punched portion 62 has a magnetic field. A vertical positioning guide 63 for guiding the side surface of the disk device 40 is bent, and a support piece 64 having a lower step substantially by the thickness t is projected before and after the positioning guide 63.

The support piece 64 is mounted on the lower side 5
It is provided at a position that does not interfere with the mechanism of the inch-type magnetic disk device 2.
A mounting hole 41 corresponding to the mounting piece 28 of the sub-frame 6
a is pierced.

The 3.5-inch magnetic disk drive 40
Various types of printed boards and electronic components are mounted on the main frame 42, but these printed boards are provided with a disk table 4 for rotationally driving a magnetic disk.
An output detection terminal unit 45 for detecting and adjusting the output waveform of the magnetic disk device 40 is provided at a position separated from the terminal 3. Since the detection holes 44 are formed in the main frame 42 at positions corresponding to the output detection terminal portions 45, the 3.5-inch magnetic disk device 2 has the 3.5 holes.
When the inch magnetic disk device 40 is assembled, the output detection terminal 45 of the 3.5 inch magnetic disk device 40 coincides with the detection hole 34.

Since the magnetic disk device according to the illustrated embodiment has the above-described structure, the 5-inch magnetic disk device 2 and the 3.5-inch magnetic disk device 40 are entirely assembled in the following steps. be able to. First, as shown in FIGS. 3 and 4, the 3.5-inch magnetic disk device 40 is mounted on the mounting plate 61 by the fixing screw 46. Thereafter, as shown in FIG. 5, the mounting plate 61 is attached to the sub-frame 6 of the 5-inch magnetic disk drive 2.
The mounting pieces 28 on the four corners of the sub-frame 6
Is fixed by the fixing screw 48.

Therefore, the screw tightening torque and the like in the fixing work by the fixing screw 48 are absorbed by the mounting piece 28 and exert an influence of the tightening torque on the side frames 3 and 4 and the main frame 5 of the 5-inch magnetic disk device 2. 5 which is adjusted in advance
The adjustment state of the inch magnetic disk device 2 and the 3.5-inch magnetic disk device 40 does not get out of order.

In the embodiment of the present invention, the 5-inch magnetic disk drive 2 and the 3.5-inch magnetic disk drive 4
Although an example of combining 0 and 0 has been described, the present invention is not limited to this example, and a plurality of 5-inch magnetic disk devices or 3.5-inch magnetic disk devices may be combined.

[0032]

As is apparent from the above description, according to the magnetic disk drive of the present invention, the mounting plate is assembled to the second magnetic disk device, and the mounting plate is attached to the sub-frame of the first magnetic disk device. Because the mounting pieces absorb the screw tightening torque and prevent the distortion of the pre-adjusted side frame or main frame of the first magnetic disk drive, A structure that does not require readjustment of the disk device can be obtained.

In the magnetic disk drive according to the present invention, a mounting plate is used to assemble a plurality of magnetic disk drives and is directly mounted on the subframe of the first magnetic disk drive. Reduction in height dimension can be realized.

[Brief description of the drawings]

FIG. 1 is a top view of a 5-inch magnetic disk drive used in the present invention with a mounting plate removed.

FIG. 2 is a perspective view when a 3.5-inch magnetic disk device is mounted on a mounting plate.

FIG. 3 is a cross-sectional view of an assembled state of a 5-inch magnetic disk drive and a 3.5-inch magnetic disk drive.

FIG. 4 is a bottom view of the magnetic disk drive for 3.5 inches in an assembled state.

FIG. 5 is a top view of the assembled state of the 5-inch magnetic disk drive and the 3.5-inch magnetic disk drive.

FIG. 6 is a perspective view of a main part of a conventional composite magnetic disk drive in an assembled state.

FIG. 7 is a sectional view of a main part of the composite magnetic disk drive.

[Explanation of symbols]

 2 Magnetic disk device for 5 inch 6 Subframe 28 Mounting piece 40 3.5 Magnetic disk device for 3.5 inch 61 Mounting plate

Claims (1)

(57) [Scope of request for utility model registration] 1. A composite magnetic disk drive in which a second magnetic disk drive is fixed to a first magnetic disk drive in a stacked state, wherein a mounting plate is fixed to the second magnetic disk drive, and the mounting plate is fixed to the second magnetic disk drive. A composite magnetic disk drive, wherein the magnetic disk drive is mounted on four corner mounting pieces formed on a subframe of the first magnetic disk drive.