JPH02187959A - Magnetic sheet device - Google Patents

Abstract

PURPOSE:To exactly execute each positioning of a magnetic head and a stabilizer in a lump by providing the magnetic head, and the stabilizer for drawing a magnetic sheet toward this magnetic head side as one body with a head carriage, respectively on the head carriage. CONSTITUTION:A head carriage 16 is supported so as to be freely slidable by guide bars 17, 18 having the outside peripheral surface being the guide reference surface positioned exactly against the reference surface 24 of a spindle motor 15, and a stabilizer 20 is formed as one body in the side end part of the carriage 16. The surface 21 opposed to a magnetic disk sheet 14 of this stabilizer 20 is inclined in the direction for going away as it goes toward the downstream side in the rotating direction R of the sheet 14 against the sheet surface being in a stop state, an air flow generated by following up a rotation of the sheet 14 flows in between the inclined surface 21 and the sheet 14 and generates negative pressure. Subsequently, a fitting part of a magnetic head 19 is formed as one body in the stabilizer 20, and positioning is executed exactly by a recessed part 22 of the center part of the inclined surface 21 of the stabilizer 20.

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 which is 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, 1B, 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 is now possible to do so.

In this way, the magnetic disk sheet 14 mounted on the spindle motor 15 is driven to rotate at high speed in the direction of arrow R by the drive of the spindle motor 15, and the magnetic head 19 comes into sliding contact with the magnetic disk sheet 14. Recording and playback are performed. Furthermore, by moving the magnetic head 19 in the radial direction of the magnetic disk sheet 140, the track on the magnetic disk sheet 14 on which recording and reproduction is performed is changed.

Further, in order to maintain good contact between the magnetic disk sheet 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 in the rotational direction R of the magnetic disk sheet 14 with respect to the sheet surface where the magnetic disk sheet 14 is in a stopped state.
The magnetic disk sheet 14 is inclined to move away from the magnetic disk sheet 14 toward the downstream side, and when the air flow generated as the magnetic disk sheet 14 rotates is introduced between the inclined surface 21 and the magnetic disk sheet 14, a negative pressure is generated. It looks like this. A concave Ff422 is formed in the center of this inclined surface 21, and a concave groove 2
A magnetic head 19 moves within 2. 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, thereby achieving a good head touch. It is.

<Problems to be Solved by the Invention> In order to achieve an appropriate head touch for good recording/reproduction in a magnetic sheet device, it is first necessary to
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 that slidably support the bed carriage 16 provided with the magnetic head 19 are usually set at the center core (not shown) formed on the rotating shaft 23 of the spindle motor 15 and on the magnetic disk sheet 140. By accurately positioning the magnetic head 19 with respect to the reference surface 11 on which it is fitted and in close contact, the tip of the magnetic head 19 is attached to the magnetic disk sheet 1.
It is accurately positioned relative to 4. On the other hand, it is also extremely important to precisely mount the stabilizer plate 20, which is provided in this magnetic sheet device and generates a negative pressure between it and the magnetic disk sheet 14. This is because a slight difference in the position of the inclined surface 21 formed on the stabilizer plate 20 with respect to the magnetic disk sheet 14, especially in the angle of inclination of the inclined surface 21 with respect to the sheet 14, causes a very large variation in the amount of negative pressure generated. ,
This is because it hinders the realization of 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, it is necessary to accurately position the stabilizer plate 20 and the magnetic head 19 individually with respect to the reference plane 24 of the spindle motor 15, which not only makes the manufacturing process extremely complicated, but also makes it difficult to position both of them. There was a problem in that accuracy itself varied, making it 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, and the guide member. a head carriage supported by a member and sliding in the radial direction of the magnetic sheet along the guide reference surface; a magnetic head that is integrally provided with the head carriage and capable of abutting the magnetic sheet; and the head carriage. A stabilizer plate is formed integrally with the magnetic sheet and generates a negative pressure between the magnetic sheet and the magnetic sheet as the magnetic sheet rotates to draw the magnetic sheet toward the magnetic head. be.

Function> A bed carriage that is slidably provided on a guide member having a guide reference surface with reference to the guide reference surface slides in the radial direction of the magnetic sheet and is provided integrally with the head carriage. The magnetic head moves while being accurately positioned with respect to the recording surface of the magnetic sheet.

Further, at this time, a stabilizer plate, which is integrally provided with the head carriage together with the magnetic head and precisely positioned with respect to the recording surface of the magnetic sheet, generates a suitable negative pressure to draw the magnetic sheet toward the magnetic head.

Embodiment Hereinafter, an embodiment of the magnetic sheet device according to the present invention will be described in detail with reference to the drawings. It should be noted that members that are the same as those in the prior art will be denoted by the same reference numerals, and a detailed explanation thereof will be omitted.

As shown in FIG. 1 in an embodiment of B, the head carriage 16 has two guide bars 17 each having an outer circumferential surface that is a guiding reference surface that is accurately positioned with respect to the reference surface 24 of the spindle motor 15. , 18, and the stabilizing plate 20 is integrally formed at the side end portion of the head carriage 16.

In other words, the surface 21 of the stabilizer plate 20 facing the magnetic disk sheet 14 is connected to the magnetic disk sheet 14 in a stopped state.
It is inclined in a direction that moves away from the sheet surface 21 as it goes downstream in the rotation direction R of the magnetic disk sheet 14, and the air flow generated as the magnetic disk sheet 140 rotates between this inclined surface 21 and the magnetic disk sheet 14. Negative pressure is generated by flowing in between. Further, a concave groove 22 is formed in the center of the inclined surface 21 of the stabilizing plate 20, and the magnetic hect 19 whose tip portion can come into contact with the magnetic disk sheet 14 protrudes from the bottom of the concave s22 of the stabilizing plate 20. It is integrated with. Therefore, magnetic herad 19
The relative positional relationship between the magnetic head 19 and the stabilizing plate 20 can be adjusted by integrally molding the mounting part of the magnetic head 19 with the stabilizing plate 20 in advance so as to set the magnetic head 19 at the most suitable position with respect to the stabilizing plate 20. can be determined accurately and easily without the need for fine adjustments after assembly. Furthermore, by optimizing the position of the stabilizer plate 20 and the magnetic head 19 provided integrally therewith with respect to the reference surface 24 of the spindle motor 15, the mounting of these magnetic heads 19 is carried out in advance by adjusting the position of the stabilizer plate 20 and the stabilizer plate 2°. By manufacturing it by integrally molding it with the head carriage 16, the reference surface 24 of the spindle motor 15 can be
There is no need to individually adjust the position of the stabilizer plate 20 or the magnetic hect 19 relative to each other. This is because the bed carriage 16 has an outer circumferential surface that is a guide reference surface that is accurately positioned relative to the reference surface 24 of the spindle motor 15.
The head carriage 16 is precisely positioned and supported by the book guide bars 17, 18.
The magnetic head 19 can be attached to the reference surface 24 by determining the positions of the magnetic head 19 and the stabilizer plate 20 when manufacturing the mold for integral molding.
This is because the position of is determined accurately.

In another embodiment, as shown in FIG.
The mounting portion is formed directly on the head carriage 16 and is integrally fixed to the head carriage 16. In this example, the stabilizer plate 20 is arranged on the magnetic disk sheet 14 on the head carriage 16 so as to surround the aforementioned magnetic head 19.
It is a ring-shaped member that protrudes to the side, and the magnetic sheet 1
Negative pressure is generated within the ring sandwiched by the magnetic sheet 14 as the ring rotates 40 times, and the magnetic sheet 14 is drawn toward the magnetic head 19. In the example of B, the stabilizer plate 20 and the magnetic head 1
9 is installed on the reference surface 2 of the spindle motor 15 in advance.
If the stabilizer plate 20 and the magnetic head 19 are manufactured integrally with the head carriage 16 so that they can be accurately positioned with respect to the stabilizer plate 20 and the magnetic head 19, there is no need to individually adjust and determine the positions of the stabilizer plate 20 and the magnetic head 19.

By the way, in the above-mentioned embodiment, only the one with the inclined surface 21 and the ring-shaped one were shown, but as the magnetic sheet 14 rotates, a negative pressure is generated between the magnetic sheet 14 and the magnetic sheet 14 to make the magnetic sheet 14 magnetic. The structure is not limited to this embodiment as long as it is drawn toward the head 19 side. Furthermore, the guide bars 17 and 18 that support the head carriage 16 are not necessarily two.
The head carriage 16 does not need to be a book, and the head carriage 16 may be slidably supported using a groove or the like instead of the book. is slidably supported by a guide member having an accurately positioned guide reference surface;
The magnetic head 1 is integrated with the head carriage 16.
9 can be attached as long as the part and the stabilizing plate 20 are formed.

<Effects of the Invention> According to the magnetic sheet device of the present invention, the magnetic sheet is drawn toward the magnetic head and the bed carriage that is slidably supported and accurately positioned by the guide reference surface of the guide member. Since the magnetic head and the stabilizing plate are provided integrally with the head carriage, the individual positioning of the magnetic head and the stabilizing plate can be performed extremely accurately all at once by positioning the head carriage.

Therefore, compared to the case where each member is positioned independently one after another, the work process is greatly simplified and costs can be reduced, and accurate head touch is obtained to achieve good recording and reproduction.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view showing one embodiment of a magnetic sheet device according to the present invention, Fig. 2 is a schematic perspective view showing another embodiment, and Fig. 3 is a schematic perspective view showing an example of a conventional magnetic sheet device. It is a schematic perspective view. 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 head carriage, 17 and 18 are guide bars, 19 is a magnetic head, 20 is a stabilizer plate, and 24 is a reference plane. be.

Claims (1)

[Claims] a spindle motor provided on the base plate and rotating the magnetic sheet; a guide member provided on the base plate and having a guide reference surface; and a spindle motor that is supported by the guide member and rotates the magnetic sheet along the guide reference surface. a head carriage that slides in a direction; a magnetic head that is integrally provided with the head carriage and that can come into contact with the magnetic sheet;
A stabilizer plate is formed integrally with the head carriage and generates a negative pressure between the magnetic sheet and the magnetic rate as the magnetic sheet rotates to draw the magnetic sheet toward the magnetic head. magnetic sheet device.