JPH02152066A - Magnetic sheet device - Google Patents

Abstract

PURPOSE:To accurately and easily set a stabilizing plate and a magnetic head in a package of their respective positions by providing both of the stabilizing plate and a magnetic head carriage to a guide member with a guide reference plane of the guide member as a reference. CONSTITUTION:The head carriage 16 fitted with the magnetic head 19 is freely slidably supported by the stabilizing plate 20, which is then disposed in a bridge state between guide bars 17 and 18 having an outer circumferential surface as the guide reference plane positioned accurately as against a reference plane 24 of a spindle motor 15. And, both end parts of the stabilizing plate 20 is fixed with these bars 17 and 18. Consequently, the stabilizing plate 20 is accurately positioned as against the reference plane 24 together with the magnetic head 19 supported by the bars 17 and 18 in a similar manner. As a result, since the head 19 and the stabilizing plate 20 are extremely accurately positioned as against a magnetic disk sheet 14, the stable and excellent recording and reproducing are carried out.

Description

Detailed Description of the Invention <Industrial Application Field> The present invention relates to a magnetic sheet device equipped with a stabilizer that generates negative pressure between a rotating magnetic sheet and draws the magnetic sheet toward a magnetic head. .

<Prior Art> As shown in FIG. 3, an example of a conventional magnetic sheet device, a spindle motor 15 for rotationally driving a magnetic disk sheet 14 is attached to a base plate 13. Further, both ends of two guide bars 17 and 18 are fixed and supported on the base plate 13 by two sets of support members 12 protruding from the base plate 13. These guide bars 17.18 are
A head carriage 16 disposed adjacent to the spindle motor 15 is slidably supported, and a magnetic head 19 is provided on the head carriage 16 . The head carriage 16 is driven by a drive device (not shown) along guide bars 17.18, and thereby the magnetic head 19 is moved and positioned in the radial direction (in the direction of arrow C) of the magnetic disk sheet 14 mounted on the spindle motor 15. It's about to happen.

- In this way, the magnetic disk sheet 14 mounted on the spindle motor 15 is rotated at high speed in the direction of arrow R by the drive of the spindle motor 15, and the i-type head 19 comes into sliding contact with the magnetic disk sheet 14, causing the magnetic disk sheet to Recording/reproduction for 14 is performed. Also, by moving the magnetic head 19 in the radial direction of the magnetic disk sheet 14, the information on the magnetic disk sheet 1-14 for recording and reproducing is recorded. - The rack is changed.

Further, in order to maintain good contact between the magnetic disk sea 1-14 and the magnetic head 19, a stabilizing plate 20 is fixed to the base plate 13 so as to sandwich the magnetic head 19. This stabilizer plate 20 has a surface 21 facing the magnetic disk sheet 14 that is inclined in a direction that becomes further away from the sheet surface of the magnetic disk sheet 14 in a stopped state as it goes downstream in the rotation direction R of the S-air disk sheet 14. The air flow generated as the magnetic disk sheet 14 rotates is introduced between the inclined surface 21 and the magnetic disk sheet 14, thereby generating negative pressure. A groove 22 is formed in the center of this inclined surface 21, and this groove 22
A magnetic rod 19 moves inside. Therefore, as the magnetic disk sheet 14 rotates, negative pressure is generated between the inclined surface 21 and the magnetic disk sheet 14, and the magnetic disk sheet 14 is drawn toward the magnetic head 19, achieving a good head touch. It is possible.

<Problems to be Solved by the Invention> In order to achieve an appropriate head touch for good recording and reproduction in a magnetic sheet device, first the magnetic head 1
The leading edge position of the magnetic disk 9 must be positioned extremely accurately with respect to the recording surface of the magnetic disk sheet 14. For this reason, the setting positions of the guide bars 17 and 18, which slidably support the head carriage 16 provided with the S-air head 19, are usually set at the rotating shaft 23 of the spindle motor 15 and on the magnetic disk sheet 14 (not shown). By accurately positioning the center core with respect to the reference surface 11 that is in close contact with the center core, the tip of the magnetic head 19 is aligned with the magnetic disk sheet 1.
It is accurately positioned relative to 4. On the other hand, it is also extremely important that the stabilizer plate 20J, which is provided in this magnetic sheet device and generates negative pressure between it and the magnetic disk sheet 14, be attached with high precision. This is because a slight difference in the offset position of the inclined surface 21 formed on the stabilizer plate 20 with respect to the magnetic disk sheet 14, especially in the inclination angle of the inclined surface 21 with respect to the sheet 14, causes a very large change in the amount of negative pressure generated. This is because it gives a negative impact and hinders the realization of a good head touch.

Therefore, in the past, the stabilizer plate 20 was directly fixed onto the base plate 13 while being accurately positioned with respect to the reference plane 24 of the spindle motor 15. However, in this case, the stabilizer plate 20
and the aforementioned magnetic head 19 must be individually and accurately positioned with respect to the reference i[24 of the spindle motor 15, which not only makes the manufacturing process extremely complicated, but also causes variations in the positioning accuracy of both. This has caused a problem in that it is difficult to achieve a good head touch.

<Means for Solving the Problems> A magnetic sheet device according to the present invention includes: a spindle motor provided on a base plate and rotating a magnetic sheet; a guide member provided on the base plate and having a guide reference surface; a head carriage slidably supported in the radial direction of the magnetic sheet by the guide reference surface of the guide member; a magnetic head provided on the head carriage and capable of abutting the magnetic sheet; A stabilizer plate is fixed to the guide member as a reference and generates negative pressure between the magnetic sheet and the magnetic sheet as the magnetic sheet rotates to draw the magnetic sheet toward the magnetic head. It is something to do.

Function> A bed carriage provided on a guide member having a guide reference surface so as to be freely slidable with reference to the guide reference surface slides in the radial direction of the magnetic sheet, and also moves toward the magnetic field provided on the head carriage. The radar moves while being accurately positioned with respect to the recording surface of the magnetic sheet. In addition, at this time, a stabilizer plate, which is provided on the guide member together with the magnetic head and accurately positioned with respect to the recording surface of the magnetic sheet with reference to the guide reference surface, generates a suitable negative pressure to move the magnetic sheet toward the magnetic head. Achieve a good hendokuchi by attracting it.

Embodiment Hereinafter, an embodiment of the magnetic sealing device according to the present invention will be described in detail with reference to the drawings. Note that the same reference numerals are given to the same reference numerals as those in the prior art, and a detailed explanation thereof will be omitted.

As this embodiment is shown in FIG. 1, the stabilizer plate 20 is
Two guide bars 17 and 18 that slidably support the head carriage 16 to which the magnetic helad 19 is attached and have outer circumferential surfaces that are guiding reference surfaces that are accurately positioned with respect to the reference surface 24 of the spindle motor 15. The hooks are arranged in a stretched manner and are fixed at both ends to these guide bars 17,18.

FIG. 2 is a schematic side view showing how the stabilizer plate 20 is installed. , the guide bar 17°] 8 is provided with a stepped portion 26 having a positioning surface 25 formed thereon that can come into contact with it at two positions. In other words, the stabilizer plate 20 is placed on the guide bars 17, 18 with the positioning surfaces 25 of the stepped portions 26 in contact with the outer peripheral surface of the guide bars 17. The guide bar 1 is secured by a screw 27 and a retaining plate spring 28 provided on the stepped portion 26 so as to be inserted into the guide bar 1.
7.18 respectively.

Therefore, the stabilizing plate 20 is the reference surface 2 of the spindle motor 15.
4, the reference surface 24 of the spindle motor 15 is directly supported by guide bars 17. It is precisely positioned against. As a result, the positions of the magnetic head 19 and the stabilizer plate 20 relative to the magnetic disk sheet 14 are determined extremely accurately, resulting in stable and good recording and reproduction.

In another embodiment shown in FIG.
．． A presser plate spring 29 is provided on the stepped portion 26 to pinch each of the guide bars 17 and 18 and bias it against the positioning surface 25, and a presser plate spring 29 that passes through the stepped portion 26 vertically in the figure and has its tip attached to the outer circumferential surface of each of the guide bars 17 and 18. It is composed of an adjustment screw 30 that comes into contact with it. Therefore, by turning this adjustment screw 30, the inclination angle and distance of the inclined surface 21 formed on the stabilizer plate 20 relative to the magnetic disk sheet 14 can be finely adjusted.
By adjusting the amount of negative pressure generated by zero, it is possible to achieve even better head touch.

Incidentally, in this embodiment, the outer circumferential direction (guide reference plane) of the guide bar 17.18 is positioned with respect to the reference plane 24 formed on the spindle motor 15, but in addition to this, for example, It is also possible to individually position the guide reference surface and the reference surface 24 of the spindle motor 15 with respect to a reference surface (not shown).

Further, in the stabilizer 20 according to the above embodiment, the stabilizer 20
Although the stepped portions 26 were provided on the base plate 13 side at the end portions located on the upstream and downstream sides, conversely, as shown in FIG. 4, the stepped portions 26
is provided above the end portion in the figure, and this stepped portion 2
The guide bar 17, 18 may be brought into contact with the positioning surface 25 of 6, and may be fixed with a screw 27, a presser plate spring 28, or the like. Furthermore, the fixing means used in the previously described embodiments, such as the screw 27 or the presser plate springs 28, 29, are not particularly limited to these. Furthermore, the step part 2
6 is not particularly provided, and the herad carriage 1
The shape of the guide member that guides and supports the guide member 6 is not limited to the rod-shaped guide bars 17 and 18 as in this embodiment. That's all there is to it.

<Effects of the Invention> According to the magnetic sheet device of the present invention, a stabilizer and a magnetic plate are used to generate negative pressure between the rotating magnetic sheet and draw the magnetic sheet toward the magnetic head to obtain a good head touch. By providing the rad carriage on this guide member with reference to the guiding reference surface of the guide member, the respective positions of the stabilizer plate and the magnetic head relative to the recording surface of the magnetic sheet can be set extremely accurately and easily at once. can do. This greatly simplifies the manufacturing process and reduces costs compared to the case where the stabilizer plate and magnetic head are positioned individually.In addition, it is possible to obtain extremely good head touch, and the recording or playback function is significantly improved. improves.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view showing an embodiment of the magnetic sheet device according to the present invention, FIG. 2 is a side cross-sectional view showing the mounting state of the stabilizer plate according to this embodiment, and FIGS. 3 and 4 FIG. 5 is a side sectional view showing other attachment states of the stabilizing plate, and FIG. 5 is a schematic structural perspective view showing an example of a conventional magnetic sheet device. In the drawing, 12 is a support member, 13 is a base plate, 14 is a magnetic disk sheet, 15 is a spindle motor, 16 is a helad carriage, 17 and 18 are guide bars, 19 is a magnetic head, 20 is a stabilizing plate, and 24 is a reference plane. , 25 is a positioning surface, 2
6 is a stepped portion, 27 is a screw, and 28.29 is a presser plate spring. Figure 2 Figure 1 Figure 3

Claims (1)

[Claims] a spindle motor that is provided on the base plate and rotates the magnetic sheet; a guide member that is provided on the base plate and has a guide reference surface; and a guide member that is slidable in the radial direction of the magnetic sheet by the guide reference surface of the guide member. a head carriage supported by the magnetic sheet; a magnetic head provided on the head carriage and capable of contacting the magnetic sheet; A magnetic sheet device comprising: a stabilizing plate that generates negative pressure between the magnetic sheet and the magnetic sheet to draw the magnetic sheet toward the magnetic head.