JPS6043257A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To bring a flexible recording medium into slide contact with a magnetic head in an optimum state and to obtain an excellent recording and reproducng characteristic by providing two pads opposite to the magnetic head on the upstream and downstream sides in the running direction of a disk or radially so as to insert the head. CONSTITUTION:A fixed substrate 20 is arranged on the head surface 21a of the magnetic head 21 fixed to a base 22. Screw holes 20a and 20b are formed in the fixed substrate 20 so that the gap 31 of the magnetic head 21 is at the center part between them, and pad support shafts 23a and 24a are screwed therein to allow the substrate to move up and down. Then, pressure pads 25 and 26 are fixed to the center of plate surfaces of holding parts 23b and 24b by using an adhesive, etc. Consequently the pad support shafts 23a and 24a are screwed in to move up and down the upstream-side pressure pad 25 and downstream-side pressure pad 26 independently.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a magnetic recording and reproducing device that records and reproduces signals while maintaining stable contact between a flexible magnetic recording medium and a magnetic head using pads. be.

[Technical background of the invention and its problems]

In recent years, with the improvement and progress of small electronic computers, signal recording devices such as magnetic recording devices are required to have even higher recording densities.The device mainly used for this purpose is the so-called floppy disk. This is a device that performs recording and reproduction by bringing a head into contact with a flexible medium. When talking about increasing the density of disk recording devices, there are two ways to think of them: improving track density and improving linear recording density, but for floppy disks, etc., improving linear density is particularly desirable due to accuracy constraints. .

However, as the linear recording density increases. 111 spacing loss cannot be ignored. Therefore, very strict sliding conditions are required between the magnetic head and the magnetic recording medium.

For example, there is a magnetic recording device having a structure shown in FIG. 1, which is applied to a conventional floppy disk.

The band viewing groove part 14 is rotatably provided with a fixed base bent into an L-shape at one end of the support base 12, and a holder 17 is attached to the vertical part of the fixed base 15 via an elastic member 16.
A pressure band 18 is fixed to the tip of the magnetic head 13, and a coil bypass 19 is inserted between the holder 17 and the fixing base 15 to form a 4n structure.

The band mechanism section 14 uses the biasing force of the coil spring 19 to press the flexible magnetic recording medium 2 against the magnetic head 13 via the pressure band 18 to maintain the flexible magnetic recording medium 2 in sliding contact.

However, since the pressure pad 18 is fixed to the cantilevered holder 17 in this mechanism, there is a drawback that the sliding state of the pressure band 18 cannot be freely adjusted. Therefore, the head surface 13a of the magnetic head 13 and the pressure pad 18
If the positional relationship between the pressure pad 18 and the sliding contact surface is impaired, the pressure pad 18 will not be able to apply pressure uniformly to the head surface 13a of the magnetic head 13 via the floppy disk medium 2, making it impossible to obtain an optimal sliding contact state. become unable. Record particularly high-density signals! ”, recording and reproduction deteriorate significantly. In addition, when using a continuous magnetic recording medium made of ferromagnetic gold (.16) as a high-density recording medium, the head surface 13
If the positional relationship between a and the sliding surface of the pressure pad is impaired, a strong coil spring with a large spring constant must be used to reduce the spacing, which will cause the media and head to wear easily. A problem arises in that it becomes easily scratched.

[Purpose of the invention]

The present invention is aimed at solving the above-mentioned fiber-spreading problem, and allows a flexible recording medium to be brought into sliding contact with a magnetic head in a state suitable for f11, thereby achieving good recording M shortness. The present invention aims to provide a magnetic recording/reproducing device.

[Summary of the invention]

In the present invention, two pads are provided facing the recording/reproducing magnetic head, and two pads are provided on the upper and downstream sides of the head in the disk running direction, or two pads are provided so as to sandwich the head in the disk radial direction. A support shaft is integrally provided on the holder that is held, and this support shaft is screwed into a board provided above the head surface, so that it can be moved independently in the direction of the head surface, thereby optimizing the sliding contact state of the band. It should be adjusted so that

〔Effect of the invention〕

According to the present invention, the following effects can be obtained.

■ Equipped with two bands to reduce the effects of curling of the media.

■ When two pads are provided to sandwich the head in the radial direction, the density between the recording surface of the flexible disk medium and the magnetic head surface is 7n, especially in any track on the inner or outer circumferential side of the flexible disk medium. Make the degree uniform and good,
Recording and playback characteristics can be improved.

t, i) If the two pads are on the upstream and downstream sides,
In particular, the degree of contact between the recording surface of the flexible disk medium and the magnetic head surface within the same track and circumference can be made uniform and good, and the reproduction output envelope can be made good.

■ Due to media curl and flexibility, the two pads can be moved below the head surface, effectively reducing head penetration. It is possible to improve the degree of adhesion and improve the recording pyrogenetic property.

[Embodiments of the invention,]

An embodiment of the invention is shown in FIG. The rigid IIZ substrate 20 is placed above the head surface 21a of the magnetic head 21 fixed to the support stand 22. Screw-in holes 20a and 20b are formed in this fixed Jll plate 0 so that the gear 31 of the magnetic head 21 is located in the center thereof, and the band support shafts 23a and 24R are screwed into these holes.・It is provided so that it can be moved downward. And holding parts 23b, 244
), pressure pads 25 and 26 are fixed to the center of the plate surface using adhesive or the like. 2. The magnetic disk medium 2 is located between the magnetic head 21 and the pressure pads 25 and 26 and rotates in the direction of arrow 30 in the figure. Therefore, pressure pad 2
5 is located on the upstream side of the travel of the magnetic disk medium 2, and the pressure band 26 is located on the downstream side. Also 27a-27b
is the disc jacket.

According to such a configuration, the pad support shaft 23a.

Pressure pad 25 on the upstream side by screwing in 24a
and the pressure pad 26 on the downstream side can be moved up and down independently.

Therefore, the flexible magnetic disk medium 2 can be brought into sliding contact with the head surface 21a in an optimal state, and the recording and reproducing characteristics can be significantly improved, and the reliability of the product can be improved and the product can be made smaller. . In particular, by locating the pressure pads 25 and 26 on the upstream and downstream sides, the flexible magnetic disk medium 2 and head surface 2 can be made uniform within the same track and circumference.
Another embodiment of the invention is shown in FIG. 3. Another embodiment of the invention is shown in FIG. In this example, 2
Instead of two pads being placed on the upstream and downstream sides, a mechanism for adjusting the pad and band height is provided to sandwich the head in the radial direction of the disk medium. In addition, the second
Components that are the same as those in the figures are given the same numbers. Pad support 1'l ((44'i9 (j337.38 are pad support shafts 37a and 38a, respectively.

Band support parts 37b, 38b and pad 39°40
It consists of a fixed board 32 with VC provided, fC screw holes 32a and 32b with pad support IJII: 3t
A, 32 ar screws up and down to move fiJ function jj'i4 published. Disk medium 2
has a centering plate 35 at its center, and rotates in a direction perpendicular to the plane of the paper by rotation of the rotating shaft 4.

Therefore, the band holding machine t'f'j ■' with such a configuration
il; 37.

38 provides pad support and bolts 37a on the inner and outer peripheries.

By independently raising and lowering 38a, the flexible disk medium 2 can be slid next to the head surface 21a in an optimal state, and good head contact can be achieved especially in one rack all over the inner and outer peripheries of the disk medium. , the recorded L reproduction characteristics can be significantly improved.

Furthermore, as shown in FIG. 4, the present invention has two band holding zones (1.7
The tilt 23.24 can also be extended radially to provide a 2+:14 band pulsation 1414:'j section 37.38.

[Brief explanation of the drawing]

Figure 1 shows a conventional recording/reproducing device f! FIG. 2 is a diagram illustrating the recording and reproducing apparatus according to the present invention, FIG. 3 and FIG.
0 are diagrams illustrating other embodiments of the present invention. 2... Magnetic disk bottom body 4... Rotating shaft 20
．． 32°...Fixed substrate 21...Magnetic head 23.
24, 37, 38... Pad support mechanism section 23a
, 24a, 37a, 38a...ノ (RAD support shaft 2
5, 26.39, 40...Katsunokutsudo agent Patent attorney Noriyuki Chika (and 1 other person) Figure 1 Figure 2

Claims (1)

[Claims] tt) ll] T D' In a magnetic recording and reproducing apparatus that records and reproduces signals while keeping a stable contact state between a magnetic recording disk medium and a magnetic head using a band, It is characterized in that two pads are attached to the pads so as to move the TSFL magnetic head on the upstream and downstream sides of the direction, or in the radial direction of the disk operating body, respectively, so that the pad height can be adjusted. Magnetic recording and reproducing device. (2) The pad height adjustment mechanism includes a pad holding section, a support shaft with a threaded end protruding from this, and a fixing device with a screw hole for aligning the end of the support shaft. 7. The magnetic recording and reproducing device according to claim 1, wherein the magnetic recording and reproducing device comprises a substrate.