JPH0743271U - Magnetic head - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to provide a magnetic head having a high performance in both recording and reproduction with a simple structure. A magnetic head 10 including a trading core 13 and a leading core 14 arranged to face each other across a gap 12 and a winding coil wound around the trading core. The magnetic head 10 is configured such that the core and the leading core are made of different materials.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a magnetic head used in, for example, a hard disk drive or a VTR.

[0002]

[Prior art]

 Conventionally, for example, a magnetic head used in a hard disk drive is configured as shown in FIG. That is, in FIG. 3, the magnetic head 1 is a monolithic type magnetic head, and the magnetic head 1 faces each other across the gap 3 so as to form a gap 3 near the center of the longitudinal edge of the head body 2. It includes a trading core 4 and a leading core 5 which are arranged, and a winding coil (not shown) wound around the trading core 4.

Here, both the trading core 4 and the leading core 5 are made of ferrite.

According to the magnetic head 1 having such a configuration, a magnetic flux is generated in the gap 3 between the trading core 4 and the reading core 5 based on the signal flowing through the winding coil of the trading core 4, and the magnetic flux is generated. The magnetic flux enables magnetic recording on a magnetic recording medium such as a magnetic disk.

A composite type magnetic head as shown in FIG. 4 is also known. In other words, in FIG. 4, the magnetic heads 6 are similarly arranged so as to form the gap 3 on one side of the longitudinal edge of the head body 2 so as to face each other with the gap 3 interposed therebetween. It also includes a trading core 4 and a leading core 5, and a winding coil (not shown) wound around the trading core 4.

In this case, unlike the magnetic head 1 of FIG. 3, the trading core 4 and the leading core 5 forming the gap 3 are surrounded by glass 7 as shown in FIG. 4B.

Here, both the trading core 4 and the leading core 5 are similarly made of ferrite.

[0008]

[Problems to be solved by the device]

 However, in the magnetic heads 1 and 6 having such a configuration, since the trading core 4 is made of ferrite, in order to correspond to the magnetic coercive force Hc of the magnetic recording medium, the soft magnetic material is formed on the ferrite surface. A membrane is provided. Therefore, the manufacturing process of the trading core 4 itself becomes complicated and the cost becomes high, and due to the existence of the soft magnetic film, the soft magnetic film acts as a pseudo gap, and a ripple is generated. Will end up.

Further, since the winding coil is wound around the trading core 4 made of ferrite, the inductance becomes relatively high, the reproducing ability deteriorates, and the output characteristic becomes low. was there.

In view of the above points, the present invention has an object to provide a magnetic head having a simple structure and having high performance in both recording and reproduction.

[0011]

[Means for Solving the Problems]

 In the magnetic head, the above-mentioned object includes a trading core and a leading core arranged to face each other across a gap, and a winding coil wound around the trading core. This is achieved by a magnetic head characterized in that the materials of the leading core are different from each other.

In the magnetic head according to the present invention, the trading core is preferably made of a material having a high saturation magnetic flux density, and the leading core is preferably made of a material having a high magnetic permeability.

[0013]

[Action]

 According to the above configuration, the trading core and the leading core forming the gap are made of different materials, preferably the trading core is made of a material having a high saturation magnetic flux density, such as sendust, and the leading core is made of a material having a high magnetic permeability. Since the trading core is made of a material such as ferrite, a high saturation magnetic flux density corresponding to the magnetic coercive force of the magnetic recording medium can be obtained and the inductance of the winding coil can be reduced.

Therefore, it is not necessary to form a soft magnetic film on the surface of the trading core, the structure is simple, the ripple effect as a pseudo gap due to the soft magnetic film does not occur, and the magnetic recording characteristics are improved. You will get it.

Further, as in the conventional case, the leading core is made of a material having a high magnetic permeability, for example, ferrite, so that the reproducing ability is not deteriorated.

Thus, a magnetic head having excellent performances for both recording and reproduction can be obtained with a simple structure.

[0017]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. FIG. 1 shows an embodiment of a magnetic head according to the present invention. In FIG. 1, a magnetic head 10 is a monolithic type magnetic head, and is opposed to each other with a gap 12 therebetween so as to form a gap 12 near the center of a longitudinal edge of a head body 11. It includes a trading core 13 and a leading core 14 arranged, and a winding coil (not shown) wound around the trading core 13.

The above configuration is similar to the conventional magnetic head 1 shown in FIG. 3, but in the magnetic head 10 according to the present invention, the trading core 13 is made of a material having a high saturation magnetic flux density, for example, The send core and the leading core 14 are made of a material having a high magnetic permeability, for example, ferrite.

As described above, in the magnetic head 10 according to the present invention, the trading core 13 is made of sendust having a high saturation magnetic flux density, and the leading core 14 is made of ferrite having a high magnetic permeability.

Therefore, regarding the trading core 13, a high saturation magnetic flux density corresponding to the magnetic coercive force of the magnetic recording medium can be obtained, and the inductance due to the winding coil can be reduced. Therefore, the magnetic recording characteristics can be improved without forming the soft magnetic film on the surface of the trading core 13.

Further, since the leading core is made of ferrite having high magnetic permeability as in the conventional case, the reproducing ability is not deteriorated and high output characteristics can be obtained.

FIG. 2 shows a composite type magnetic head according to the present invention. That is, in FIG. 2, the magnetic head 20 is arranged on one side of the longitudinal end of the head main body 21 so as to form a gap 22. 23 and a leading core 24, and a winding coil (not shown) wound around the trading core 23. Further, as shown in FIG. 2B, the trading core 23 and the leading core 24 forming the gap 22 are surrounded by glass 25.

According to this configuration, the same operation and effect as those of the magnetic head 10 of FIG. 1 can be obtained.

[0024]

[Effect of device]

 As described above, according to the present invention, it is possible to provide an extremely excellent magnetic head that has high performance in both recording and reproduction with a simple configuration.

[Brief description of drawings]

1A is a schematic perspective view and FIG. 1B is a partially enlarged perspective view showing an embodiment of a magnetic head according to the present invention.

2A is a schematic perspective view and FIG. 2B is a partially enlarged perspective view showing another embodiment of a magnetic head according to the present invention.

3A is a schematic perspective view, and FIG. 3B is a partially enlarged perspective view showing an example of a conventional magnetic head.

FIG. 4A is a schematic perspective view and FIG. 4B is a partially enlarged perspective view showing another example of a conventional magnetic head.

[Explanation of symbols]

 10,20 Magnetic head 11,21 Head body 12,22 Gap 13,23 Trading core 14,24 Leading core 25 Glass

Claims (2)

[Scope of utility model registration request] 1. A trading head, comprising: a trading core and a leading core arranged to face each other across a gap; and a winding coil wound around the trading core. A magnetic head, wherein the materials of the leading core are different from each other. 2. The magnetic head according to claim 1, wherein the trading core is made of a material having a high saturation magnetic flux density, and the leading core is made of a material having a high magnetic permeability.