JPH054367U - Magnetic head - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a thin magnetic head. A coil 17 wound in a cylindrical shape in a direction parallel to a bearing surface 14 facing a recording surface (not shown) of a magnetic disk is provided to record and reproduce data on the recording surface of the magnetic disk. The iron core 24 to be performed is inserted and supported in the slit 23 except the coil 17. Cylindrical coil 17
The height B of the magnetic head can be made small and thin by setting the winding direction of No. 1 as shown in FIG. Although the minute void portion of the iron core 24 is not shown, it is accommodated in the slit 23 so as to be flush with the bearing surface 14.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a magnetic head used in a magnetic disk device.

[0002]

[Prior Art]

 One of the methods to meet the demand for a magnetic disk device having a larger storage capacity is to increase the number of magnetic disks. Since the external dimensions of the magnetic disk device must be within practically acceptable standards, the spacing between adjacent magnetic disks must be narrowed as the number of magnetic disks is increased. The conventional magnetic head was sufficient for up to about 4 magnetic disks, but if the number of magnetic disks is increased more than that, the gap between the magnetic disks becomes smaller and the assembly of the device becomes difficult.

As a conventional magnetic head proposed to solve this problem, for example, there is one disclosed in Japanese Patent Laid-Open No. 64-37784. FIG. 7 is a perspective view showing such a so-called monolithic type magnetic head. In FIG. 7, 11 is a ferrite slider, which is the tallest rear portion 12 (height A) and a plane shape lower than it. A shelf 13 (height B) is formed, and a bearing surface 14, which is an opposing surface thereof, faces the recording surface of the magnetic disk through a thin air film layer generated due to rotation of the magnetic disk (not shown). The C core 16 is bonded to the rear end surface of the rear portion 12 so as to form the minute void portion 15, and the coil 17 has a length L in the height direction of the C core 16, that is, in the direction perpendicular to the bearing surface 14. It is wound in a tubular shape.

In order to keep the maximum height of the magnetic head within the dimension A of the rear portion 12, a suspension (not shown) is attached to the upper surface of the flat shelf 13, and the thick portion of the suspension is moved upward by the rear portion 12. The structure is such that it does not protrude, and the height of the magnetic head is low.

[0005]

[Problems to be solved by the device]

 Since the conventional magnetic head is constructed as described above, the height of the magnetic head is determined by the dimension A of the rear portion 12 which is the highest portion of the slider 11, and when the height of the rear portion 12 is lowered, it becomes C Since the length L of the portion of the core 16 around which the coil 17 is wound becomes short and it is not possible to wind a predetermined number of turns, there was a natural limitation in reducing the height of the rear portion 12.

The present invention has been made to solve the above problems, and an object thereof is to obtain a magnetic head having a low height.

[0007]

[Means for Solving the Problems]

 In the magnetic head according to the present invention, the coil is wound around the iron core in a cylindrical shape in a direction parallel to the facing surface of the slider, and the non-magnetic material portion of the slider supports the minute void portion of the iron core.

[0008]

[Action]

 By winding the coil in a cylindrical shape in a direction parallel to the facing surface of the slider, the height of the iron core (dimension in the direction perpendicular to the facing surface of the slider) is not restricted by the number of windings of the coil and can be lowered. When the coil is wound as described above, the dimension of the iron core in the lateral direction (direction parallel to the facing surface of the slider) becomes large, but the non-magnetic material portion of the slider supports the minute void portion of the iron core. There is no risk of damage due to insufficient strength of the iron core.

[0009]

【Example】

 1 to 3 show an embodiment of the present invention. FIG. 1 is a perspective view showing a magnetic head as seen from the back side, FIG. 2 is a perspective view as seen from the bearing surface side, and FIG. 3 is a perspective view of an iron core. It is a figure. Incidentally, this one embodiment is a so-called hybrid type. In these figures, 21 is a slider, which is made entirely of ceramic, has the same height B as the flat shelf 13 of FIG. 7, and has a groove as shown in the rear part (front side of FIG. 1). 22 and a slit 23 are provided. Reference numeral 24 denotes an iron core, which has a rectangular shape as shown in FIG. 3. A coil 17 (in this case, wound in a rectangular tube shape) is inserted into the groove 22 so as to be exposed in the groove 22. The other part including is entirely fixed in the slit 23 by a glass bond (not shown) (see FIG. 2). In this embodiment, the slider 21 as a whole is made of ceramic and is made of a non-magnetic material.

In the embodiment of FIG. 1, the groove 22 is provided to facilitate the insertion of the iron core 24 into the slit 23. Instead of the groove 22, a notch 25 is provided as shown in FIGS. 4 and 5, respectively. , 26 may be provided, or a recessed portion for accommodating the coil 17 may be provided. The coil 17 of the iron core 24 is not shown in FIGS. 4 and 5. Further, instead of providing the slit 23 for inserting the iron core 24, the iron core 24 may be adhered to the side of the slider 21 (see FIG. 6 later). Of course, one slider 21 may be provided with a plurality, for example, one iron core 24 on each side.

FIG. 6 is a perspective view of a monolithic magnetic head according to another embodiment of the present invention. In the drawing, 31 is a slider, which is adhesively integrated with a front part 32 made of ferrite. It is composed of a ceramic rear portion 33 which is a non-magnetic material portion. The rear portion 33 is provided with a notch 34, the C core 16 is fixed to the front portion 32, and the other portions including the minute void portions 15 except the coil 17 are bonded to the rear portion 33 by a glass bond. Has been done.

[0012]

[Effect of the device]

 As described above, according to the present invention, the coil is wound in a cylindrical shape having an axis parallel to the facing surface of the slider, and the minute void portion of the iron core is also supported by the slider. The head is obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing a magnetic head according to an embodiment of the present invention as viewed from the back side.

FIG. 2 is a perspective view showing a magnetic head according to an embodiment of the present invention as seen from the facing surface side.

FIG. 3 is a perspective view of an iron core according to an embodiment of the present invention.

FIG. 4 is a perspective view showing another embodiment of the present invention.

FIG. 5 is a perspective view showing still another embodiment.

FIG. 6 is a perspective view showing still another embodiment.

FIG. 7 is a perspective view showing a conventional magnetic head.

[Explanation of symbols]

 14 Bearing Surface 15 Micro Void 16 C Core 17 Coil 21, 31 Slider 23 Slit 24 Iron Core 33 Rear Member

Claims (1)

Claims for utility model registration 1. A slider having a facing surface facing a recording surface of a rotating magnetic disk, and a minute void portion and a coil, and the minute void portion being close to the recording surface. In a magnetic head having an iron core supported by the slider so as to be positioned to record and reproduce data on and from the magnetic disk by the coil, at least a part of the slider is made of a non-magnetic material portion. A magnetic head characterized in that the magnetic material portion supports the minute void portion and the coil is wound in a cylindrical shape in a direction parallel to the facing surface.