JPS6257179A - Magnetic head - Google Patents

Abstract

PURPOSE:To obtain good follow-up property to undulation and vibration of a medium by giving elastic force to a slider provided with a magnetic core by a spring member periphery of which is fixed to a base stand. CONSTITUTION:A slider 3 provided with a magnetic core 2 is fixed by bonding nearly at the center of a plate spring. Bonding agent is applied on the periphery of the spring 5 and fixed on a notched part 13A of a base stand 13. An end of longitudinal direction of S-shaped platelike or rodlike spring members 14, 15 is fixed to a part in the notched part 13A. When the base stand 13 is formed by molding, the members 14, 15 are integrated at the same time incorporating the member 14 or 15. Another end of the member 14 is thrusted against a face opposite to the surface of the spring 5 facing the center of the slider 3. The slider 3 is made slightly movable in vertical direction to the face of medium elasticity of the spring 5 and member 14. The magnetic head is used pressing a slider 4 to the slider 3 with the medium 1 between, and good follow-up property is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic head, and particularly to a magnetic head used in a floppy disk device.

[Prior Art] FIG. 5 is a perspective view showing the overall appearance of a magnetic head used in a conventional floppy disk device. As shown in the figure, it has a structure in which a flexible, flat medium 1 is sandwiched between sliders 3.4 each having a magnetic core 2.

The slider 3 is mounted on a plate spring 5, and the plate spring 5 is fixed to a base 6.

Further, as shown in FIG. 6, the load arm 7 that holds the slider 4 is attached to the base 6 by screwing a plate-like metal member 8 integrated therewith to the base 6 via a holding plate 9.
It is configured to sandwich the medium 1 and apply pressure thereto by the pressing force of the load spring 10.

The holding portion of the slider 3 is constructed by mounting the slider 3 equipped with the magnetic core 2 on a plate spring 5 and fixing the plate spring 5 to a base 6, as shown in FIG.
Alternatively, as shown in FIG. 7, after fixing the slider 3 directly to the small base 11, this small base 11 is attached to the second base
(Japanese Patent Publication No. 58-15866).

As already described in detail with reference to FIG. 5, in the conventional magnetic head described above, in order to maintain good adhesion between the slider 3 and the medium pair 1, the slider 3 is placed between the medium 1 and the medium 1.
A load spring 10 is provided on the opposite side, and the load arm 7 is pressed against the medium 1 by this pressure.

[Problems to be Solved] In the conventional magnetic head described above, the plate spring 5
Alternatively, since the slider 3 fixed to the small base 11 can hardly move in the direction perpendicular to the medium surface, the slider 3 has a poor ability to follow the undulations and vibrations of the medium 1, resulting in stable recording. The disadvantage is that it cannot be played or played. In addition, when fixing the slider 3 to the plate spring 5 or the small base 11, the slider 3
It is necessary to make the surface inclination and installation height of the slider 3 highly accurate in order to maintain adhesion with the medium 1, which requires the use of complicated jigs and tools, and the work of fixing the slider 3 is also complicated. The disadvantage is that it requires a large amount of man-hours.

[Means for Solving Problems] A magnetic head of the present invention which solves the above conventional problems includes a slider having a magnetic core, a plate spring on which the slider is fixedly mounted, and a periphery of the plate spring. a base on which is fixedly mounted, and a spring member having one longitudinal end fixed to a part of the base and the other end directly or indirectly connected to the slider, the slider However, the spring member provides elasticity.

[Examples] Hereinafter, the present invention will be described in detail with reference to the drawings showing preferred embodiments.

FIG. 1 is a cross-sectional view of a magnetic head according to an embodiment of the present invention. Note that common reference numerals are given to parts showing the same configuration as the conventional magnetic head shown in FIGS. 5 to 7.

In FIG. 1, a slider 3 equipped with a magnetic core 2 is adhesively fixed approximately at the center of a plate spring 5. As shown in FIG. Then, this plate spring 5 is attached to the base 1 by applying adhesive around it.
It is fixed on the notch 13A of No. 3. A part of the notch 13A of the base 13 is provided with a spring member 14.15 in the longitudinal direction of a plate-like shape as shown in FIG. 2 or a rod-like S-shape as shown in FIG. One end is fixed. The spring members 14 and 15 can be integrated by incorporating the spring members 14 or 15 at the same time when the base 13 is molded with a metal mold. As shown in FIG. 1, the other end of the spring member 14 is pressed against the surface of the plate spring 5 opposite to the surface part of the plate spring 5 that faces the center of the slider 3. As a result, the slider 3 5 and spring member 1
The elasticity provided by 4 allows slight movement in the direction perpendicular to the medium surface. The magnetic head holds the medium 1 between this slider 3 and another slider 4 on the opposite surface.
used by imposing As described above, the slider 4 is configured to sandwich the medium 1 and apply pressure by the pressing force of the load spring 10.

According to the magnetic head of this embodiment with the above-described configuration, even when the medium has undulations or vibrations in a direction perpendicular to its surface, the slider 3 can be moved against the medium by elastic deformation of the spring member 14. Good followability can be obtained, the slider 3 and the medium 1 are brought into close contact, and stable magnetic recording and reproduction can be performed.

Furthermore, the conditions for attaching the slider 3 to the plate spring 5, that is, the inclination of the surface of the slider 3 and the installation height, do not require high accuracy because errors in these are absorbed by the deformation of the spring member 14. As shown in FIG. 7, if a small protrusion 16 is formed on a portion of the plate spring 5 opposite to the surface portion of the plate spring 5 facing the center of the slider 3, the spring member 1
Since one end of the slider 4 contacts the small protrusion 16 and pressurizes the plate spring 5, the center portion of the slider 3 can be easily pressurized with high precision. It is also possible to press the center of the slider 3 directly using the spring member 14 without using the plate spring 5, and in this case, as in the embodiment shown in FIG. This allows stable recording and playback to be performed. Also,
It goes without saying that the slider 4 on the opposite side of the slider 3 with the medium 1 therebetween may also be pressurized by a spring member in a direction perpendicular to the medium.

[Effects of the Invention] As described in detail above, the magnetic head of the present invention presses the center portion of the slider with a spring member whose one end is fixed to the base, so that the slider moves in the direction perpendicular to the medium surface. Since it is possible to provide a function that allows slight movement to the media, it is possible to obtain good followability against waviness and vibration of the medium, and has the effect of making stable recording and reproduction possible at all times.

In addition, errors in the slider's surface slope and installation height are absorbed by the deformation of the spring member, so high precision is not required, and manufacturing costs are reduced because it can be manufactured with fewer assembly steps than conventional magnetic heads. There is also the effect that it can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a magnetic head according to an embodiment of the present invention. 2 and 3 are respectively perspective views of a spring member used in the magnetic head of FIG. 1, FIG. 4 is an enlarged sectional view of a magnetic head according to another embodiment of the present invention, and FIG. 5 is a conventional FIG. 6 is a cross-sectional view taken along the line xx in FIG. 5, and FIG. 7 is a cross-sectional view showing the other side of the conventional magnetic head.

Claims (1)

[Claims] a slider equipped with a magnetic core, a plate spring on which the slider is fixed and mounted, a base on which the periphery of the plate spring is fixed and mounted, and one longitudinal end thereof is a part of the base. What is claimed is: 1. A magnetic head comprising a spring member fixed to the slider and having another end directly or indirectly connected to the slider, the spring member imparting elasticity to the slider.