JPS63133346A - Magnetic head device - Google Patents

Abstract

PURPOSE:To enable a stable recording and reproduction by nearly equalizing the rigidity of flexible members of two sheets positioned facing the surfaces of a flexible disk within supporting plates. CONSTITUTION:A 1st carriage 4 movable in the direction of an arrow 12 of a discoid flexible disk 1, is mounted with a 1st magnetic head 5 via a 1st supporting plate 6, whereas facing this head 5, a 2nd carriage 8 supportedly movable with the 1st carriage 4, is mounted with a 2nd magnetic head 9 via a 2nd supporting plate 10. The supporting plate 6 is bent in its arm parts 6a-6d in the direction of an arrow 13 to be a stable condition with a slight bending. Each twist rigidity of tie-bars 6x and 6y of the supporting plate 6 is nearly equalized to each twist rigidity of tie-bars 10x and 10y of the supporting plate 10 respectively and each bending rigidity of the arm parts 6a-6d is nearly equalized to that of each of the arm parts 10a-10d of the supporting plate 10, so that the tie-bar parts and the arm parts are exactly the same in shape and also in plate thickness and material.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to magnetic recording: 6! CR! The present invention relates to a magnetic head device in 1, and more specifically relates to a magnetic head support structure.

[Conventional technology]

FIG. 4 is a sectional view of essential parts of a magnetic head in a conventional magnetic head device.

A first magnetic head 55 that holds the flexible disk 51 and records/reproduces it. a flexible first support plate 56 that supports the second magnetic head 55; a second support plate 56;
The first carriage 54. is loaded with and moves. A second magnetic head 59 that holds the flexible disk 51 together with the first magnetic head 55. a flexible second support plate 60 that supports the second magnetic head 59; The second carriage 58 is equipped with the second support plate 60 and is rotatable (not shown) facing the first magnetic head 55, and is supported by the first carriage 54 and moves. Ta.

Further, FIG. 15 is a plan view of a main part of a first conventional magnetic head device, and FIG. 6 is a plan view of a main part of a second conventional magnetic head device. In FIG. 5, the first support plate 56 is made of an extremely thin metal plate, and a groove is provided in its plane.
6x is twisted, arm parts 56a, 56b, 56c, 56
By bending d, the center line (X axis) of tie bar 56x
The tie bar 56y is twisted around the axis, and the arm portion 5
By bending 6a, 56b, 56c, and 56d, it was possible to rotate about the center line (Y axis) of the tie bar 56y.

The second support plate 60 has the same structure as the first support plate 56, and is made of an extremely thin metal plate (as shown in FIG. 6), and has grooves in its plane. Due to the groove, the second magnetic head 59 twists the tie bar 60x and bends the arm portions 60a, 60b, 60c, and 60d, so that the second magnetic head 59 rotates about the center line (X axis) of the tie bar 60x.
In addition, the tie bar 60y is twisted, and the arm portions 60a, 60b
.

By bending 60c and 60d, it was possible to rotate around the center line (Y axis) of tie bar 60y.

Further, as shown in FIG. 4, when the first magnetic head 55 and the second magnetic head 59 are sandwiching the flexible disk 51, the second carriage 58 is applied with an appropriate pressure am (not shown). ) applies an appropriate pressing force to the arms 56a, 56b, 56c, 5, respectively, which causes the first support plate 56 and the second support plate 60 to
6d (shown in Figure 5), 60a, 60b, 60c,
60d (shown in FIG. 6) is flexed in a direction substantially perpendicular to the plane of the flexible disk, ie, in the direction of arrows 63 and 65 in FIG. 4, so that it is stabilized in a slightly flexed state.

However, since it is necessary to secure an installation space 52 (shown in FIG. 5) on the support plate for a lead wire connected to the first magnetic head 55 as a means for transmitting and receiving signals, the first support plate 56 is the center of the tie bar 56y!
! (Y-axis), the same space as the lead wire installation space 52 will be arranged at a position symmetrical to the Y-axis, and as a result, the first support plate 56. Since the first carriage 54 becomes large, the first support plate has to be asymmetrical with respect to the Y axis in order to create a compact and thin magnetic head device.

As a result, the arm portion 56a of the first support plate 56,
A difference arises in the bending rigidity of the first support plate 56, 56b, 56c, and 56d, and the influence of the rigidity of the lead wire on the first support plate 56 causes the arm portions 56a, 56 of the first support plate 56 to differ.
The stiffnesses of samples b, 56c, and 56d were significantly different from each other.

Further, the second support plate 60 also has arm portions 60a, 60b, 60c like the first support plate 56.

The stiffness of each 60d was different.

In addition, since the conventional structure was made based on the idea of making a flexible disk follow a magnetic head, the first support plate 56 was made to have increased rigidity to be close to a rigid body, and the second support plate 56 A method has been used in which a second magnetic head 59 presses the flexible disk 51 against the first magnetic head 55 supported by the flexible disk 51 to perform recording and reproduction.

As a result, the corresponding members of the first support plate 56 and the second support 60 have different rigidities.

FIG. 7 is an explanatory diagram of the inclination of the magnetic head in the above-mentioned stable state. In FIG. 7, the first carriage 54 carries the first magnetic head 55 via the first support plate 56, and the second carriage 58 carries the second magnetic head via the second support plate 60. 59 is mounted, and a flexible disk 51 is held between a first magnetic head 55 and a second magnetic head 59.

The rigidity of the arm portion of the first support plate 56 is 56a, (5
Similarly, the arm portion of the second support plate 60 shown in 6d), 56b, and 56c is 60a.

(60d), 60b, and (60c), respectively.

Arm portions 56a, 56b, 56 of the first support plate 56
c, 56d or 60a, 60b, 60c.

60d, the amount of deflection of each part of the arm differs, so as shown in FIG. 6, the first magnetic head 55 and the second magnetic head 59 are It was stable in a state where it was tilted toward the side with lower bending rigidity.

[Problem that the invention seeks to solve]

As described above, in the conventional technology, the first support plate and the second support plate are stabilized in a tilted state, and when the first magnetic head and the second magnetic head are tilted, the i@air head The problem was that the followability to the flexible disk was impaired, and recording and playback were unstable.

Therefore, the present invention aims to solve these problems.
The purpose of this is to improve the followability of a magnetic head to a flexible disk and to perform stable recording and reproduction.

[Means for solving problems]

A magnetic head device of the present invention includes a pair of magnetic heads for recording and reproducing data by sandwiching a flexible disk, which is a magnetic recording medium, and having flexibility in a direction substantially perpendicular to the plane of the flexible disk. In a magnetic head device comprising a carriage on which the magnetic head is mounted and moved via two supporting plates (1M supporting plate), the magnetic head is located at a position facing the flat surface of the flexible disk within the two supporting plates. , the rigidity of the flexible members is made almost the same.

[Effect]

According to the above structure of the present invention, when a flexible disk is held between a pair of magnetic heads in a stable state, the magnetic head is stable with respect to the flexible disk without tilting, and the magnetic head is stable with respect to the flexible disk. Trackability can be improved and stable recording and reproduction can be performed.

〔Example〕

FIG. 1 is a cross-sectional view of the main parts of an embodiment of the magnetic head device of the present invention, FIG. 2 is a plan view of the main parts of the first magnetic head device, and FIG. 3 is a main part of the second magnetic head device. FIG.

In FIG. 1, a first carriage 4 is movable in the radial direction (direction of arrow 12) of a disc-shaped flexible disk 1.
connects the first magnetic head 5 via the first support plate 6,
It is equipped.

Moreover, it is rotatable (
A second carriage 8 carried by the first carriage 4 (not shown) and driven by the first carriage 4 has a second magnetic head 9 mounted thereon via a second support plate 10 .

In FIG. 2, the first support plate 6 is provided with a groove in its plane, and the groove allows the tie bar 6X or 6y to be twisted, and the arm portions 6a, 6b, 6c, which connect the tie bar 6y and the tie bar 6X, 6d bends, the magnetic head 5 rotates about the center line (X-axis or Y-axis) of the tie bar 6X or 6y, following the inclination of the flexible disk 1 (shown in FIG. 1). It is possible to make close contact with the flexible disk 1.

Further, as shown in FIG. 1, the first support plate 6 is arranged in a direction substantially perpendicular to the plane of the flexible disk, that is, as indicated by the arrow 13 in FIG.
For the direction shown in FIG. 2, the arm portion 6a of the first support plate 6 shown in FIG.

6b, 6c, and 6d are bent and stabilized in a slightly bent state.

In FIG. 3, the second support plate 10, like the first support plate, is provided with a groove in its plane, and the groove allows the tie bar 10x or 103/ to be twisted and the tie bar 10x to be connected to the tie bar. Arm parts 10a, 1 connecting 10y
By bending 0b, 10c, and 10d, the second magnetic head 9 follows the inclination of the flexible disk 1 and rotates about the center line (X axis or Y axis) of the tie bar 10x or lOy. , it is possible to make close contact with the flexible disk 1.

Further, as shown in FIG. 1, the second support plate 10 is arranged in a direction substantially perpendicular to the plane of the flexible disk (arrow 15 in FIG. 1).
), the arm portions 10a, 10b, 10c of the second support plate 10.

10d (shown in Figure 3) is deflected and stabilized in a slightly deflected state.

The torsional rigidity of the tie bar 6y or 6X of the first support plate 6 is made approximately the same as the torsional rigidity of the tie bar 10y or 10x of the second support plate 10, respectively, and the arm portions 6a, 6b of the first support plate 6 are made. .

The bending rigidity of the second support plate 10 is 6c and 6d, respectively.
In order to make the bending rigidity of the arm parts 10a, 10b, 10c, and 10d almost the same, the tie bars of the first support plate 6 and the second support plate 10 (6X and 10x, 6y and 103
/) and the arm portions (6a and 10a, 6b and 10b, 6c and 10c, 6d and 10d) are made in exactly the same shape, and the thickness of the first support plate 6 and the second support plate 10, The material is the same.

As shown in the embodiments described above, by making the rigidity of the flexible members that are located opposite to the plane of the flexible disk in the two supporting plates substantially the same, the flexible disk 1 is held between the first magnetic head 5 and the second magnetic head 9, the first magnetic head 5 and the second magnetic head 9 are stable without tilting, and the magnetic head follows the flexible disk. This makes it possible to perform stable recording and reproduction.

〔Effect of the invention〕

As described above, according to the present invention, by making the rigidity of the flexible members of the two support plates facing each other with respect to the flexible disk plane substantially the same, the flexible disk can be When a pair of magnetic heads are held in a stable state, the magnetic head is stabilized without tilting with respect to the flexible disk, and the followability of the magnetic head to the flexible disk can be improved, and stable recording and reproduction can be performed. Therefore, the practical effects of the present invention are extremely large.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the main parts of an embodiment of the magnetic head device of the present invention, FIG. 2 is a plan view of the main parts of the first magnetic head device, and FIG. 3 is a cross-sectional view of the main parts of the first magnetic head device. FIG. FIG. 4 is a sectional view of the main part of the magnetic head in a conventional magnetic head device, FIG. 5 is a plan view of the main part of the first conventional magnetic head device, and FIG. 6 is a main part of the second magnetic head device. FIG. FIG. 7 is an explanatory diagram of the inclination of the magnetic head. 1...Flexible disk 4...First carriage 5...First magnetic head 6...First support plate 8... -Second carriage 9...Second magnetic head 10...Second support plate 12...Flexible disk radial direction 13.1
5...Approximately perpendicular to the plane of the flexible disk or more Applicant Seiko Epson Co., Ltd. Agent Patent Attorney Tsutomu Mogami et al. Figure 7

Claims (1)

[Claims] By sandwiching a flexible disk, which is a magnetic recording medium,
A pair of magnetic heads for recording and reproducing, two support plates that have flexibility in a direction substantially perpendicular to the plane of the flexible disk and support each of the magnetic heads, and the magnetic heads are mounted via the support plates. A magnetic head device comprising a moving carriage, characterized in that the rigidity of flexible members located in the two supporting plates facing the plane of the flexible disk are made almost the same. head device.