JPS62192961A - Magnetic recorder - Google Patents

Abstract

PURPOSE:To improve the durability of a magnetic head and a floppy disk FD by opposing a depression pad elongating in the radial direction of the floppy disk FD and having a cavity in the radial direction to a gap of a magnetic head to depress the floppy disk FD thereby reducing the depressing force of the depressing pad. CONSTITUTION:The depressing pad 6 elongated in the radial direction of the disk FD is arranged so that the cavity 5 is opposed to the recording/reproducing gap 1a-1 and the erasure gap 1a-2 of the magnetic head 1. The disk FD 2 is bent by the depressing pad 6 along the spherical face of the magnetic head 1, the disk FD 2 is in close contact onto the gap 1a of the magnetic head 1 by the elastic force of the disk FD 2 to attain the recording/reproduction/ erasure. Thus, the depressing weight is decreased from 5g to nearly 10g and the durability of the disk FD is improved remarkably as 20,000,000-30,000,000 passes (consecutive use of one track).

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an auxiliary storage device for an electronic computer, and particularly to a magnetic recording device using a flexible two-base electromagnetic disk.

BACKGROUND OF THE INVENTION In recent years, with the miniaturization and increase in capacity of electronic computers, magnetic recording devices (floppy disk drives: hereinafter referred to as FDDs (called FDDs) are also required to be smaller and have larger capacities, as well as long lifespans and high reliability for the magnetic drives installed in FDs and FDDs.

By the way, in order to perform highly efficient electromagnetic conversion, the FD, the magnetic head, and the pressing pad press the FDf with the pad so that it comes into close contact with the gap portion of the magnetic head. Therefore, as the pressing force increases, the three components are more likely to wear out, which is a drawback in terms of extending the lifespan and high reliability of the FD and FDD.

As these prior art, for example, Utility Model Application Publication No. 60-770
No. 68 and Utility Model Application Publication No. 60-77069 are known.

While referring to the drawings below, the conventional FD press pad 3 \-
.

An example of an FDD equipped with a card will be described.

Fig. 13 is a side view of a conventional FDT (FDT), and Fig. 14 is a schematic diagram of an FD cartridge used in the FDD of Fig. 13, showing the arrangement of the FD 2, magnetic throat 1, and pressure pad 6. . 3 is the cartridge frame 0, Fig. 16 A, B
13 are a plan view and a side view of a conventional pressing pad throat (material Noelt), and as shown in the side view of the FDD in FIG. It is located in

In addition, 7 is a pressure pad holding arm, 12.8 is a carriage,
10id)--John spring, 15id: turntable, 14 is a drive motor.

The operation of the FDD configured as described above will be explained below.

The FD 2 is normally driven at a rotational speed of 300 RPM, and the magnetic nodule 1 and the pressure pad 6 are integrally moved by a carriage 8 from the outer periphery of the FD 2 to random axes 14 with an inner layer agent. Figures 16A and B are the conventional F shown in Figures 15A and B.
D press pad is FD2'! 5 is a plan view and a cross-sectional view of the press to explain the state of pressing, and 16 is a rack.

In the third mode, two parts of the pressing hash 6 are connected to the recording/reproducing gear of the magnetic nozzle 1, the push part 1a-1 and the erasing gear part 1a-.
Recording, playback, and erasing are performed by pressing down the FD2. This h1 magnetism-\nod 1 and F
T) In order to minimize the separation length between 2,
It was necessary to make the pressing force of the pressing pad 6 as large as possible. , the pad pressing load is normally set at approximately 20 g.1. Problems that the invention attempts to solve (~) However, in a configuration like the Sat nT2, the frictional force between the FD and the magnetic head when the FD rotates is large. Kikuna 9, abrasion of the magnetic IJI layer of the magnetic head and FD occurs, causing damage to the FD and magnetism.
... had the disadvantage of shortening the lifespan of the device. More specifically, sliding scratches occur on the surface of the FD and magnetic throat121. -7I scratches caused deterioration of +a during electromagnetic conversion and misconceptions1.Furthermore, if the pressing force of the pressing pad becomes too strong, it will deform during long-term use and the pressing force will become uneven. Magnetic conversion special V1 to eggplant 71. leading to the deterioration of /
child. "-/This, if the pressing force is reduced to reduce wear on the FD and magnetic head 5-7, the life of the double blade will be improved, but due to the generation of a separation length, the reproduction output of the magnetic head will decrease, jitter, etc. However, it has the disadvantage that electromagnetic conversion characteristics deteriorate, such as an increase in ration. In the case of a conventional pressure pad, the lifespan of the FD is usually about 5 million busses (continuous use of one track).

In view of the problems mentioned above, the present invention makes it possible to improve the durability of the magnetic throat and FD by reducing the pressing force of the pressing pad.

Means for Solving the Problems In order to solve the above-mentioned problems, the FDD of the present invention has a pressing pad that extends in the radial direction of the FD and is concave in the radial direction, facing the gap portion of the magnetic head. FD'! i?
It is designed to be pressed.

Operation The present invention utilizes the contact between the FD and the magnetic head 6, -1 due to the elastic force of the FD itself by pressing and bending the FD due to the pressing force of the pressing pad. The pressing force of the pressing pad can be reduced, greatly improving the durability of the magnetic throat and FD. There is no deterioration in characteristics.

EXAMPLE 5 An FDD according to an embodiment of the present invention will be described below with reference to the drawings.5. FIG. 1 shows a side view of an FDTI according to a first embodiment of the present invention. , In Fig. 1, 1 is a magnetic head and 2 is an FD.

Reference numeral 6 denotes a press pad, and 7 an arm for holding the press F1-pad. The magnetic head 1 and the press pad 6 are held integrally with the carriage 8 and accessed in the Xjj direction. Further, the pressing pad 6 presses the FD%-magnetic head with a pressing load of y. FIGS. 2A and 2B are a plan view and a side view of a pressure pad in the FDD of the first embodiment. It's the third
Figures A and B are a plan view and a sectional view showing a state in which the pressing pad presses the FD against the magnetic head. The pressing pad 7 extending in the radial direction of the FD is arranged so that the recording/reproducing gear of the magnetic head 1, the knob 1a-1 and the erasing gear 1a-2 are opposed to each other in the recessed part 5. TeF D
2 f, (press. As shown in Figure 3, FD 2 is pressed in and throat 6 -) is applied to the magnetic field, 7 is pressed and bent along the spherical surface of 1, FT) by the elastic force of 2. Magnetic nose 1
It comes into close contact with the gear amplifier section 1a, and recording, reproduction, and erasing are performed.

The reproduction output and modulation of the magnetic head were investigated by changing the pad pressing load from 3g to 25g4 in the shape of the pressing pad of the FDD in this example. As a result, the first
As shown in Figures 1 and 12, the pad pressing load is 3g.
It was found that even with 10g of soil, the soil output was sufficiently high and the modulation and ration were small. , -force, in this example,
If the pressure load is 10 or more, the playback output will be low T [7
However, in 1.11, when the pressing load increases, the frictional force between the FD and the magnetic head 1 due to the pressing pad 6 increases, and the FD 2 floats between the two parallel bars of the pressing pad 6. This is because the separation length has become larger.
This behavior is very different from the relationship between the pad pressing load Nk and the reproduction output 7 in the conventional example.

As shown in FIG. 3, in this embodiment, a concave recess is provided in the press pad, and the gear part of the magnetic throat is opposed to the recess, thereby increasing the press load from 69 to 10,000 yen. When it is reduced to about 9, - and becomes usable, and FDL7)) durability is 20 to 30 million buses (
Continuous use of 1 track) and performance can be greatly improved/) 6. Furthermore, the durability of the Sasaki example is approximately 5 million buses 3. Figure 4 A, B, Figure 5 A, B, Figures 6A and B are 2nd. Third. 4. The shape of the pressing pad 6 shown in 1 is a plan view and a side view of the pressing pad in the FDD of the fourth embodiment.・Even if the pad press load is reduced by /J, as in the first embodiment, a point is created, which greatly improves the durability of the FD2.

FIG. 7 is a sectional view showing a state in which a pressing pad presses against a magnetic head in an FDD according to a fifth embodiment. In this example, the I'IP pad 6 shown in FIG. 2 is used. The pressing load is 10. By this, the pressing bar throat is 6.
The lowest point to the magnetic throat 1 is the side where the FD 2 enters the magnetic throat 1 and the pressing pad 6, the part on the twisting recording/reproducing gap 1 to 1 side, and the erasing gap 1a- 2
The side portion is slightly lifted from the magnetic head 1.

By making the pressing state of the pressing pad 6 slope in this way, as shown in FIGS. 11 and 12, when the pressing load is increased, the frictional force between the throat 1 and the FD 2 is reduced to the magnetic field of the pressing pad 6. This can prevent the FD2 from lifting due to friction.

In this embodiment, although the lower limit of the pad pressing load is slightly larger than in the first embodiment, the appropriate range of the pressing load can be widened. With a pressing load of 10 g, the durability of the FD was approximately 20 million passes, which was approximately the same effect as in the first embodiment. Although the arm is tilted, the opposing protrusions 10 of the pressing pad may be tilted so that the thickness of the peaks differs.

FIG. 8 is a side view of an FDD according to a sixth embodiment of the present invention, and FIGS. 9A and 9B are a plan view and a top view of a pressure pad in the FDD of this embodiment. Figures 10A and 10B are a plan view and a sectional view showing the state in which the pressing pad presses the FD against the magnetic head.

In FIG. 8, reference a is an arm that holds the press-in/knob 6, which moves up and down when inserting and removing the FD cartridge, but since it is not integrated with the carriage 8, it moves in the X direction of the magnetic head 1. I7 of movement for access of \
The FDD 3 is of a fixed type, and the other mechanisms are the same as the FDD of the first embodiment shown in FIG.

Even with the shape of the pressing pad of the FDD in this example, the same results as in the first example can be obtained, the pressing load can be reduced, and the surface durability of the FD can be greatly improved. I can do it. 3. Effects of the Invention It is clear from the above explanation that the present invention (the pressing pad of the dFDD extends in the radial direction of the FD and has a concave shape in the radial direction, and the concave concave portion is magnetically・Since the configuration is such that the FDi is pressed against the RAD gear and pump section, it is possible to stably perform FDD without damaging the Pt during electromagnetic conversion of the magnetic head even with a load less than half of the conventional pressing load.
This allows the magnetic head and F
The excellent effect of being able to obtain a long life of D and high reliability e+ is obtained.

Furthermore, in the FDD of the present invention, the thickness of the pressing pad is sloped, or the holding part of the pressing pad is sloped, so that the pressing pad is sloped, and the lowest point of the pressing pad due to the slope is magnetically applied.・By configuring the FD to be located on the entry side of the RAD, the appropriate range of pressing load can be widened from low loads to high loads, and the appropriate load can be selected according to the FDD application and usage environment. This makes it possible to achieve the excellent effect of greatly improving the durability of the magnetic head and FD.

Due to the fact that the electromagnetic conversion characteristics are not impaired even with a pressing load of about 7 g, we changed the constituent materials of the magnetic rad from the conventional fluorite and barium titanate to Nokuichi Malloy and metal Zaboto. However, there is no problem with durability, and it is possible to lower the price of the magnetic head.

[Brief explanation of drawings]

1 and 8 are schematic side views of a magnetic recording device according to an embodiment of the present invention, and FIGS. 2A and 2B are respectively. Figure 4 A, B, Figure 5 A, B, Figure 6 A, B, Figure 9 A
, B are a plan view and a side view showing an example of a pressing bar and a pad used in the present invention, respectively, and FIGS. 3A and 3B. FIGS. 10A and 10B are plan views and sectional views illustrating the state in which the pressure pads shown in FIGS. 2 and 9 press the magnetic disk, respectively, and FIG. 7 is a sectional view of another embodiment of the present invention. , FIG. 11, and FIG. 12 show Example 1 and Example 6. 13 is a schematic side view of the magnetic recording device in the conventional example; FIG. The figure is a schematic diagram of the FD, and Figures 15A and 15B are a plan view and side view of a conventional press (13 base 7 rad), and Figures 16A and 16B are Figure 16A.
, B are a plan view and a cross-sectional view for explaining a state in which the pressing pads press the magnetic disk. DESCRIPTION OF SYMBOLS 1...Magnetic head, 2...Magnetic disk, 5...Khome part, 6...Press pad. Name of agent: Patent attorney Toshio Nakao and one other person V=
” -N Hani School A7- Fig. 7/a Fig. 8 × /θ Fig. 9 (A) (δ) Fig. 10 Z , -:) Fig. 13 Knee - Fig. 14 r'-/L--''--2) ■ IL-9 Fig. 15 (A) (B) Fig. 16

Claims (2)

[Claims] (1) A magnetic disk pressing pad is provided for pressing a flexible magnetic disk against a magnetic head, and the pressing pad extends in the radial direction of the magnetic disk and has a concave recess in the radial direction, and the concave recess is A magnetic recording device comprising a magnetic disk pressing pad facing the gap portion of the magnetic head. (2) The thickness of the pressure pad is sloped or the holding part of the pressure pad is sloped to give the pressure pad a slope, and the lowest point of the pressure pad due to the slope is set to the magnetic disk toward the magnetic head. The magnetic recording device according to claim 1, wherein the magnetic recording device is located on the entrance side of the magnetic recording device.