JPS6398808A - Magnetic head - Google Patents

Abstract

PURPOSE:To contrive to attain mass-production by providing a long groove along the running direction to a floating face of a flexible slider and pushing to spread inner walls of the groove in lengthwise direction opposed to each other by means of a plate spring so as to deform the slider in a curved shape thereby eliminating the hindrance of adsorption with a medium. CONSTITUTION:Two floating faces 6, 6' in parallel are formed in a face of the flexible slider 5 along the running direction of the medium. Then a long groove 7 is provided along the running direction of the medium to deform a plate spring 10 elastically to be in elastic contact onto the opposed inner walls 8, 8' and the slider 5 is deformed in a curved shape to ward the outside orthogonal in the running direction to form the faces 6, 6' to be a barrel form. Thus, the head copes with a change in temperature/humidity and the adsorption failure between the slider 5 and the medium is eliminated. Moreover, the faces 6, 6' of the slider 5 have only to be ground in advance in the shape of plane and no composite machining is required. Thus, the adsorption failure between the slider and the medium is eliminated and mass-production is attained.

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 magnetic disk device.

[Prior Art] Conventionally, this type of magnetic head has a structure in which a slider 2 having a magnetic core 1 is fixed to a gimbal-shaped spring 3, as shown in FIG.

By the way, as shown in FIG. 6, the slider 2 has two parallel arcuate floating surfaces 4 and 4' along the traveling direction of the medium. By doing so, adsorption failure between the slider 2 and the medium is avoided. Particularly for a thin film medium whose medium surface has highly accurate flatness, the arcuate shape of the air bearing surface 4.4' has the effect of exhibiting high reliability against changes in environmental temperature and humidity.

[Problem to be Solved by the Invention 1] However, precise machining techniques are required to process the surface of the slider into an arcuate surface with a radius of curvature of several meters. Therefore, due to processing accuracy, variations may occur in the surface roughness of the air bearing surface and the shape of the air bearing surface, which may make it impossible to achieve the intended purpose, and increase costs due to the need for advanced processing technology. This method not only causes problems, but also has the disadvantage that mass production is difficult.

An object of the present invention is to provide a magnetic head that solves the above problems.

[Means for Solving the Problems] The present invention provides a magnetic head equipped with a slider having an arc-shaped air bearing surface along the length direction, and a flexible slider having a long groove along the length direction of the air bearing surface. A magnetic head is characterized in that it is combined with a plate-shaped spring that presses and expands opposing inner walls in the direction in which the long groove extends, thereby deforming the slider in a curved manner.

[Implementation I-1]] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

(Example 1) As shown in Figure 1 (ah (b) and Figure 3), in this example (
Two parallel and flat upper surfaces 6, 6' are formed in one surface of the flexible slider 5 along the running direction 9 of the medium, and are surrounded by 2* air bearing surfaces 6, 6'. slider 5
A long groove 7 is provided on one side and extends in the running direction 9 of the medium, and by elastically deforming the plate spring 10 shown in FIG. The restoring force of the plate spring 10 pushes the opposing inner walls 8, 8' of the long groove 7 outward, causing one side of the slider 5 to move outward perpendicularly to the running direction 9 of the medium. The flat air bearing surfaces 6, 6' provided on one side of the slider 5 are formed into a medium-height arc shape by protruding and deforming them in a curved manner.

According to this embodiment, the slider body 5 is curved under the spring stress of the temporary spring 1°, and the floating surfaces 6, 6' are formed in the shape of a medium-height arc along the traveling direction 9 of the medium. Adsorption problems with the medium are eliminated, and reliability can be improved against changes in environmental temperature and humidity. Also,
The two air bearing surfaces 6, 6' of the slider body 5 can be ground in advance into a flat shape as shown in FIG. 1(a), and the manufacturing cost of the slider can be reduced. Furthermore, since no complicated machining is required, there is little variation in surface roughness or flatness of the air bearing surface. Furthermore, it is easy to install the plate spring 10 inside the slider body. The concave portion of the slider body of the plate spring 10-i) can be mass-produced by molding and has good dimensional accuracy, so there is little variation in the shape of the air bearing surface after the plate spring is installed.

(Embodiment 2) FIG. 4 shows Embodiment 2 of the present invention, in which each of the floating surfaces 6 and 6' provided on the left and right edges of one side of the slider 5 is provided along the running direction 9 of the medium. Long grooves 11 and 11' are provided, and plate springs io and io are installed in the long grooves 11 and 11' on the side of each air bearing surface 6 and 6', respectively, and the opposing inner walls are expanded separately on the left and right sides to form the slider 5 body. By deforming the flat air bearing surface 6゜6' into a curved air bearing surface 6, 6 with a medium height
’. According to this embodiment, since the long grooves 11.11' are provided in the left and right air bearing surfaces 6°6', plate springs with different spring coefficients are installed in the left and right lengths @11.11', respectively. Therefore, the left and right air bearing surfaces 6
The radius of curvature of °6' can be adjusted to different values.

[Effects of the Invention] As explained above, in the present invention, the slider is curved and the air bearing surface of the slider is formed in an arc shape. Therefore, the air bearing surface only needs to be flat-polished, and curved surface processing of the air bearing surface is not required. Cost 1~ can be made inexpensive and mass production can be realized.Furthermore, the air bearing surface can be flat-polished in advance, improving the accuracy of the air bearing surface and reliably eliminating adhesion problems between the slider and the medium. It has ・b.

[Brief explanation of the drawing]

FIG. 1(a) is a cross-sectional view showing the slider before assembly in the present invention, FIG. 1(b) is a cross-sectional view showing the slider after assembly, and FIG.
3 is a perspective view showing a first embodiment of the present invention, FIG. 4 is a perspective view showing a second embodiment of the present invention, and FIG. 5 is a perspective view showing a conventional example. FIG. 6 is a perspective view showing a conventional slider. 1...Magnetic core 3...Cymbal-shaped spring

Claims (1)

[Claims] (1) In a magnetic head equipped with a slider having an arcuate air bearing surface along the length direction, a flexible slider having a long groove along the length direction of the air bearing surface and an opposite side of the long groove in the length direction A magnetic head characterized in that it is combined with a plate-like spring that pushes out an inner wall and curves a slider.