JPS61271679A - Magnetic head - Google Patents

Abstract

PURPOSE:To attain always stable recording and reproduction by making the distance between both ends of a plate spring holding a slider narrower than the spring distance and fixing the spring to a base so as to move minutely the slider in a direction vertical to a medium face. CONSTITUTION:The slider 2 provided with a magnetic core 1 is adhered and fixed to nearly the center of the plate spring 7 and both front/back ends 8, 9 of the spring 7 are sticked and fixed onto the base 10 while being contacted with projections 11, 12 provided at a narrow distance than the length of the spring 7. Thus, the spring 7 is bent as a bow and the slider 2 is minutely moved in a direction vertical to the medium face owing to the elastic deformation, the slider follows excellently the medium and the slider 2 and the medium are contacted closely so as to attain stable magnetic recording and reproduction.

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.

[Conventional technology]

FIG. 2 is a perspective view showing the overall appearance of a magnetic head used in a conventional 70-ply disk device. As shown in the figure, it has a structure in which a flexible flat medium 14 is sandwiched between sliders 2 and 15 each having a magnetic core. The slider 2 is mounted on a plate spring 3, and the plate spring 3 is simply fixed to a base 4. Further, the load arm 16 that holds the slider 15 is fixed to the base 4 by screwing a plate spring member 17 integrated therewith to the base 4 via a presser plate 18.
The structure is such that a pressure (C pressure) is applied to the medium 14 by applying pressure from a one-load spring 19.

As shown in FIG. 3, the holding part of the slider 2 is
The slider 2 equipped with this is mounted on the plate spring 3, and the plate spring 3 is simply fixed to the base 4 (Japanese Patent Publication No. 58-1
5866), or as shown in FIG. 4, the slider 2 can be directly fixed to the small base 5 and then the small base 5 can be fixed to the second base 6. There is. In such a conventional magnetic head, in order to maintain good adhesion between the slider 2 and the medium 14, as described in detail with reference to FIG. A spring 19 is provided, and the spring 19 is configured to use this pressure to press the load arm 16 against the medium 14 or to press another slider instead of the elastic member.

However, since the slider 2 fixed to the plate spring 3 or the small base 5 can hardly move in the direction perpendicular to the medium surface, the slider has poor ability to follow the undulations and vibrations of the medium. Therefore, it has the disadvantage that stable recording and playback cannot be performed. Furthermore, when fixing the slider 2 to the plate spring 3 or the small base 5, it is necessary to make the surface slope and installation height of the slider 2 highly accurate in order to maintain close contact with the medium. This method requires the use of complicated jigs and tools, and furthermore, the work of fixing the slider 2 is complicated and requires a large amount of man-hours.

[Problem that the invention seeks to solve]

The problem to be solved by the present invention is to improve the drawback of the conventional magnetic head that the slider cannot move in the direction perpendicular to the medium surface as described above. An object of the present invention is to provide a magnetic head for a floppy disk device that eliminates the above-mentioned drawbacks.

[Means for solving problems]

The magnetic head of the present invention includes a plate spring having a magnetic core fixedly mounted in the center of the turret, and an interval narrower than the distance between the two facing sides of the plate spring. and a base having two parallel protrusions provided therein, and the two facing sides of the plate spring are fixed to the protrusions of the base.

〔Example〕

Next, the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a perspective view showing a first embodiment of the present invention.

In FIG. 1, a slider 2 equipped with a magnetic core 1 is glued and fixed at the center of a plate spring 7. This plate spring 7 is fixed by adhering its front and rear ends 8 and 9 against protrusions 11 and 12 provided on the base 10 at intervals of the length and width of the plate spring 7. There is. For this reason, the plate spring 7 is curved in an arched manner.
The elastic deformation of the plate spring 7 allows the slider 2 to move slightly in a direction perpendicular to the medium surface. The magnetic head is used by pressing an elastic member or other slider against the opposite surface of the slider 2 across the medium.

Therefore, even if the medium undulates or vibrates in a direction perpendicular to its surface, the slider 2 can obtain good followability to the medium due to the elastic deformation of the plate spring 70.
The slider and medium come into close contact, allowing stable magnetic recording and reproduction. Furthermore, the slider 2 cannot be mounted to the plate spring 7 with high precision as in the conventional method because errors in the installation conditions such as the inclination of the surface of the slider 2 and the installation height are absorbed by the deformation of the plate spring 7. do not need. Furthermore, the method for holding the plate spring on the base 10 is to simply fix the ends 7 and 8 of the plate spring 7 to the protrusions 11 and 12 of the base 10 with adhesive, and therefore the conventional magnetic Assembly man-hours can be reduced compared to heads.

FIG. 5 is a perspective view showing a second embodiment of the invention.

In this embodiment, the plate spring 13 is formed into a wave shape and is fixed to the projections 11 and 12 of the base 10.

In this case as well, the slider 2 has the function of being able to move slightly in the direction perpendicular to the medium surface, and as in the embodiment shown in FIG. can be recorded and played back.

Note that the positions of the protrusions 11 and 12 against which the plate springs 7 and 13 abut are not limited to being provided in the front and back direction of the base as shown in FIGS. 1 and 5, but in the left and right direction of the base. Needless to say, it may be placed in

〔Effect of the invention〕

As explained in detail above, the magnetic head of the present invention is arranged so that the slider is perpendicular to the medium surface by fixing both ends of the plate spring holding the slider to the base with an interval narrower than the distance between the two ends. Since it is possible to provide the ability to make slight movements in certain directions, it has the effect of obtaining good followability against waviness and vibration of the medium, and therefore enables stable recording and playback at all times. Furthermore, since it can be manufactured with fewer processing and assembly steps than conventional magnetic heads, it also has the effect of reducing manufacturing costs.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention, FIG. 2 is a perspective view showing an example of the overall appearance of a conventional magnetic head, and FIGS. 3 and 4 are sliders of a conventional magnetic head. FIG. 5 is a perspective view showing an example of the configuration of a holding portion of the present invention, and FIG. 5 is a perspective view showing a second embodiment of the present invention. 1...Magnetic core, 2...Slider,
7...Plate spring, 8, 9... End, 1
0... Base, 11゜th l Figure $2 Figure

Claims (1)

[Claims] A plate spring with a fixed magnetic core mounted in the center, and two parallel protrusions corresponding to two opposing sides of the plate spring and provided at a narrower interval than the distance between the two opposing sides. 1. A magnetic head, comprising: a base having a section, and the two facing sides of the plate spring are fixed to the protrusion of the base.