JP3023744B2 - Magnetic head - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises an inductive magnetic head for magnetically recording and reading information on an information recording medium such as a magnetic card, and records information on the information recording medium by the inductive magnetic head. The present invention relates to a magnetic head including a magnetoresistive element for reading information on a magnetization pattern recorded in advance in a direction different from the direction of the magnetization pattern.

[0002]

2. Description of the Related Art Conventionally, other information is often written in addition to original information recorded on an information recording medium such as a magnetic card. For example, there is a method of recording a security pattern in advance as shown in FIG. 2 in order to prevent forgery / falsification of a magnetic card. This is because, in addition to the magnetization pattern 2 of the original information recorded on the magnetic card 1 (two tracks in the figure), the security magnetization pattern 3 has a direction different from that of the magnetization pattern 2 (45 ° in the figure). The azimuth is recorded on the slope. In order to read a plurality of magnetization patterns 2 and 3 recorded in such different directions, conventionally, a plurality of separate inductive magnetic heads each having a magnetic sensing portion corresponding to the recording direction of each magnetization pattern 2 and 3 are used. Have been placed.

[0003]

However, the conventional arrangement structure of the induction type magnetic head is a structure in which a plurality of induction type magnetic heads are simply arranged side by side. There is often a variation in the arrangement angle of each induction type magnetic head, and there has been a problem that the mounting position of the induction type magnetic head becomes inaccurate and a stable output cannot be obtained. Therefore, the present invention provides a magnetic device in which the inductive magnetic head and the magnetoresistive element can be easily and accurately arranged in different directions while reducing the size by combining the inductive magnetic head and the magnetoresistive element. The aim is to get the head.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a magnetic head for performing recording and reading on an information recording medium having a plurality of magnetization patterns capable of recording in mutually different directions, wherein the magnetic head is an induction type magnetic head. And the magneto-resistance effect element, wherein the inductive magnetic head includes a gap for writing and reading a magnetization pattern of the information recording medium, and the magneto-resistance effect element reads the magnetization pattern of the information recording medium. The induction type magnetic head and the magnetoresistive element are housed in parallel in a common case, and the gap of the induction type magnetic head and the magnetosensitive section of the magnetoresistive element are provided. Are provided in different directions.

[0005] Secondly, there is provided a magnetic head for performing recording and reading on an information recording medium having a magnetization pattern of information that can be recorded and read and a security magnetization pattern that can be recorded and read in a direction different from the recording direction of the magnetization pattern of the information. A magnetic head including an inductive magnetic head for recording and reading a magnetization pattern of information and a magnetoresistive element having a magneto-sensitive section for reading a security magnetization pattern; and thirdly, an inductive magnetic head and a magnetoresistive element. On the sliding contact surface of the case containing the effect element with the information recording medium,
Provided is a magnetic head provided with a window for accommodating the inductive magnetic head and the magnetoresistive element separately.

[0006]

In the magnetic head having such a configuration, a small-sized magnetoresistive element is employed for reading the security magnetization pattern, and the magnetoresistive element is positioned in the case of the induction type magnetic head. In the case of a small-sized magnetic head, recording and reading of a magnetization pattern of information are performed by an inductive magnetic head, and reading of a security magnetization pattern is accurately performed by a magnetoresistive element.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. The magnetic head 11 according to the embodiment shown in FIG. 1 has a head case 12 made of a magnetic shielding material. In the head case 12, an inductive magnetic head 13 and a magnetoresistive element 14 are accommodated. I have. That is, the inductive magnetic head 13 and the magnetoresistive element 14 are housed so that the head case 12 is a common case, and are fixed by a known method. On the sliding surface 12a of the head case 12 with the magnetic card 1, there are provided windows 12b and 12c which are continuous in the card running direction.
2c shows an inductive magnetic head 13 and a magnetoresistive element 1
4 are fitted and exposed.

As described in the above conventional example, the information magnetization pattern 2 on the magnetic card 1 is an original information recording track for recording and reading. The security magnetization pattern 3 is a signal for determining the authenticity of the card, and is approximately 45 ° from the recording direction of the information magnetization pattern 2.
Are recorded in advance in an azimuth direction. The inductive magnetic head 13 and the magnetoresistive element 14 are provided at an arrangement angle of approximately 45 degrees with respect to the recording direction of each of the magnetization patterns 2 and 3.

More specifically, the air gap 13a of the induction type magnetic head 13 and the magnetic sensing part 14 of the magnetoresistive element 14
a and the window holes 12b and 12c have substantially the same shape.
The first and second magnetized patterns 2 and 3 are positioned so as to be surely positioned by fitting with each other so as to traverse substantially perpendicularly to the recording directions of the first and second magnetized patterns 2 and 3, respectively. That is, the air gap 13a and the magnetically sensitive part 14b are arranged so as to form approximately 45 degrees with each other in accordance with the recording direction of the first and second magnetization patterns 2 and 3.

The operation is as follows. When the magnetic card 1 is inserted and run in the card running path of the magnetic card reader in which the magnetic head 11 is incorporated, the gap 13a of the induction type magnetic head 13 comes into sliding contact with the first magnetization pattern 2. Record and read information. At the same time, the magnetic sensing portion 14a of the magnetoresistive effect element 14 slides on the second magnetization pattern 3 to read the security signal. Therefore, the authenticity of the magnetic card 1 is determined by the magnetoresistive effect element 14, and if the card is correct, information is transmitted and received by the inductive magnetic head 13.

[0011]

Modification In the above embodiment, the gap 13a of the induction type magnetic head 13 and the magneto-sensitive portion 14a of the magnetoresistive effect element 14 are provided side by side in the card running direction. The present invention is also applicable to a movable magnetic head type magnetic card reader in which a magnetic head is moved while a card is fixed. Further, the present invention can be similarly applied to a magnetic head in which a magnetoresistive element for reproducing a security pattern is embedded in an inductive magnetic head for recording / reproducing a plurality of pieces of recorded information.

[0012]

As described above, in the magnetic head according to the present invention, the induction type magnetic head and the magnetoresistive element are housed side by side in a common head case, and the gap of the induction type magnetic head is The magnetic sensing portion of the resistance effect element is arranged in directions different from each other corresponding to the recording directions of a plurality of magnetization patterns, respectively. A small magnetoresistance effect element is used as a read head, and an inductive magnetic head is used. And the magnetoresistive element are positioned in a common head case and housed compactly, so that the inductive magnetic head and the magnetoresistive element can be easily and accurately mounted in different directions while miniaturizing the device. And productivity can be improved.

[Brief description of the drawings]

FIG. 1 is an external perspective view illustrating the structure of a magneto-resistance effect type magnetic head according to an embodiment of the present invention.

FIG. 2 is an explanatory plan view showing an example in which a security pattern is azimuth-recorded on a magnetic card.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Magnetic card 2 Magnetization pattern of information 3 Magnetization pattern for security 11 Magnetic head 12 Head case 12b, 12c Window hole 13 Induction type magnetic head 13a Void portion of induction type magnetic head 14 Magnetoresistive element 14a Magnetism of magnetoresistive element Department

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-58-77020 (JP, A) JP-A-58-166526 (JP, A) JP-A-63-241702 (JP, A) 225923 (JP, A) Japanese Utility Model Hei 5-5304 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G11B 5 / 02,5 / 39,5 / 29 G11B 5/10, 5 / 127,5 / 187 G11B 5/265 G06K 7/08

Claims (3)

(57) [Claims] 1. A magnetic head for performing recording and reading on an information recording medium having a plurality of magnetization patterns capable of recording in mutually different directions, wherein the magnetic head comprises an inductive magnetic head and a magnetoresistive element. The head includes a gap for writing and reading a magnetization pattern on the information recording medium, the magnetoresistive element includes a magneto-sensitive section for reading the magnetization pattern on the information recording medium, and the inductive magnetic head and the magnetic head. A magnetic head in which a resistance effect element is accommodated in parallel in a common case, and a gap of the induction type magnetic head and a magnetic sensing part of the magnetoresistive element are arranged in different directions. 2. A magnetic head for performing recording and reading on an information recording medium having a magnetic pattern of information that can be recorded and read and a security magnetic pattern that can be read in a direction different from the recording direction of the magnetic pattern of information. 2. An inductive magnetic head for recording and reading magnetic patterns, and a magnetoresistive element having a magneto-sensitive section for reading security magnetic patterns.
3. The magnetic head according to claim 1. 3. A window hole for accommodating the inductive magnetic head and the magnetoresistive element separately in a sliding contact surface of the case for accommodating the inductive magnetic head and the magnetoresistive element with the information recording medium. The magnetic head according to claim 1, wherein a magnetic head is provided.