JPH08115508A - Magnetic head device - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a head device that secures a stable head touch by reducing a gap distance between the heads in a composite head including at least two thin film magnetic heads. [Structure] At least two thin film heads 1 and 2 are arranged such that extended surfaces of thin film forming surfaces 3 and 4 intersect each other. Since the gap between the two heads can be reduced without impairing the strength of the thin film heads 1 and 2, with a simple structure in which the thickness of the substrate of the thin film heads 1 and 2 is partially thinned diagonally, The pad 13 stabilizes the tape head touch, and a stable and highly reliable device can be realized even in digital recording and reproduction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head device used in a tape recorder or the like.

[0002]

2. Description of the Related Art In recent years, magnetic head devices have been widely used in tape type recording / reproducing devices such as tape recorders. Especially, in digital audio tape recorders, magnetic head devices using thin film heads are used instead of conventional bulk heads. Has been done.

An example of a conventional magnetic head device using the above-mentioned thin film will be described below with reference to the drawings.

FIG. 4 shows a cross section of a main part of a conventional magnetic head device. In FIG. 4, reference numeral 1 is a reproducing head composed of a thin film, and 2 is a recording head composed of a thin film. It is attached in the positional relationship of. Playback head 1 and recording head 2
The thin film forming surfaces 3 and 4 are arranged parallel to each other, and have head gaps 6 and 7 on the tape sliding contact side. The distance between the head gaps is determined by the thickness of the base material of the thin film heads facing each other. Magnetic tape 12
Are simultaneously pressed and urged to the head gaps 6 and 7 by the pad 13, and recording and reproduction are performed. Numerals 8 and 9 are flexible printed circuit boards for connecting the head and the reproducing / recording circuit. The reproducing flexible board 8 is circuit-connected to the reproducing head 1 by means of wire bonding or the like at the end of the thin film forming surface 3 and is fixed by adhesion. ing. The flexible recording substrate 9 is circuit-connected to the recording head 2 by means of wire bonding or the like at the end of the thin film forming surface 4 and is fixed by adhesion.
The reproducing / recording flexible substrates 8 and 9 are drawn out from the end portions of the thin film forming surfaces 3 and 4 in a form orthogonal to the case member 15 and reach the recording / reproducing circuit.
Each is forced to bend 90 degrees. 16,
Reference numeral 17 is a tape guide pin set up in the cassette, 14 is a leaf spring for obtaining pad pressing force, and 11 is a mounting plate for fixing the head housing 10 to the device.

[0005]

However, in the conventional composite type magnetic head device having two independently formed and coupled thin film magnetic heads, the gap distance between the two heads is such that the thin film magnetic heads face each other. Since it is determined by the thickness of the substrate, it is necessary to reduce the thickness of the substrates facing each other in order to reduce the distance, and there is a limit in terms of strength. As a result, the two head gap positions are separated from the vicinity of the central portion of the pad for pressing the tape, which causes an unstable head touch.

[0006]

In order to solve the above problems, in the magnetic head device of the present invention, the extended surfaces of the thin film forming surfaces of at least two independently formed thin film magnetic heads intersect each other. It was configured to do.

[0007]

According to the present invention, the distance between the two head gaps can be shortened by only partially reducing the thickness of the substrate for forming the thin film by using the above-described structure, and the central portion of the pad can be used. Get the pressed state of the tape.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a sectional view of the essential parts of a magnetic head device showing an embodiment of the present invention. In FIG. 1, 1 is a reproducing head composed of a thin film, 2 is a recording head composed of a thin film,
A part of the substrate is cut with an inclination, and the extension lines of the thin film forming surfaces 3 and 4 are arranged so as to intersect with each other on the sliding contact surface side of the thin film heads 1 and 2 with the magnetic tape 12 and bonded by the bonding surface 18. Combined and compounded. The combined head is attached to the head housing 10 in a predetermined positional relationship. Reference numerals 6 and 7 denote head gaps formed on the tape-sliding surface side of the thin film forming surface for reproduction and recording.
2 is pressed and urged by the pad 13 to record / reproduce.
Numerals 8 and 9 are flexible printed boards for connecting the head and the reproducing / recording circuit. The reproducing flexible board 8 is circuit-connected to the reproducing head 1 by means of wire bonding or the like at the end portion of the thin film forming surface 3 and is fixed by adhesion. ing. The flexible recording substrate 9 is circuit-connected to the recording head 2 by means of wire bonding or the like at the end of the thin film forming surface 4 and is fixed by adhesion. The flexible substrates 8 and 9 pulled out from the ends of the thin film forming surfaces 3 and 4 are case members 15
It will be bent at an angle to. Reference numerals 16 and 17 denote tape guide pins set up in the cassette, 14 a leaf spring for obtaining a pad pressing force, and 11 a mounting plate for fixing the head housing 10 to the device.

As described above, according to the present embodiment, the extension lines of the thin film forming surfaces 3 and 4 of the two thin film magnetic heads 1 and 2 intersect each other on the tape sliding contact surface side of the heads. The distance between the two head gaps can be shortened by only partially reducing the thickness of the substrate for forming
The tape is pressed using the central portion of the pad 13.
In addition, flexible substrates 8 and 9 for connection with the recording / reproducing circuit
Is bent obliquely with respect to the case member 15, and the bending angle is 90 degrees or less, resulting in high reliability and
As compared with the conventional example in which the flexible substrate goes straight to the case member, the bending position can be relatively closer to the head side, so that the case member can be configured closer to the head and the device can be downsized.

In the embodiment shown in FIG. 1, the thin film head is a single-function head for recording or reproducing, but in order to cope with reciprocal recording / reproducing, the thin film forming surface of each head has a composite gap for recording / reproducing. It may be a head having. Further, in the embodiment of FIG. 1, the substrate portions of the two thin film heads are obliquely cut and joined, but it is also possible to have a configuration in which the substrate portion of only one of the thin film heads is obliquely cut.

FIG. 2 is a sectional view of the essential parts of a magnetic head device showing a second embodiment of the present invention. The difference from the embodiment shown in FIG. 1 is that it is composed of one thin film head. The thin film forming surface 20 of the thin film head 19 is arranged to be inclined with respect to the case member 15 located at the rear of the head housing 10, and its end is connected to the flexible substrate 22 by means such as wire bonding.

As described above, according to this embodiment, the flexible substrate 22 extending in parallel from the thin film forming surface 20 by arranging the thin film forming surface 20 inclined with respect to the case member 15 is shown in FIG. It is possible to follow the case member 15 with a bending angle smaller than that of the conventional flexible substrate shown in the figure, and the reliability is improved, and the bending position is relatively closer to the head side than in the conventional example in which the flexible substrate goes straight to the case member. Therefore, the case member can be formed closer to the head, and the device can be downsized.

FIG. 3 is a cross-sectional view of an essential part showing a third embodiment in which the flexible substrate 22 is pulled out to the opposite side from the embodiment shown in FIG. Also in this embodiment, the same effect as that of the embodiment shown in FIG. 2 can be achieved.

[0014]

As described above, according to the present invention, the extended surfaces of the thin film forming surfaces of at least two thin film magnetic heads that are independently formed and coupled to each other are configured to intersect with each other. The head gap distance can be shortened, and even in a composite head using at least two thin film heads, the tape pressing state can be realized by using the central portion of the pad, and high density recording represented by digital recording / reproducing. A stable head touch can be obtained even during reproduction. In addition, since the head gap distance of each head can be shortened with a simple configuration in which the thickness of the substrate for forming the thin film is only partially thinned, the composite type without compromising the strength of the thin film head. The thin film magnetic head can be realized.

[Brief description of drawings]

FIG. 1 is a sectional view of a main part of a magnetic head device showing a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of essential parts of a magnetic head device showing a second embodiment of the present invention.

FIG. 3 is a cross-sectional view of essential parts of a magnetic head device showing a third embodiment of the present invention.

FIG. 4 is a sectional view of a main part of a conventional head device.

[Explanation of symbols]

 1 reproducing thin film head 2 recording thin film head 3,4 thin film forming surface 5 head gap 12 magnetic tape 13 pad

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toru Tanaka 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (1)

[Claims] 1. A magnetic head device, characterized in that at least two thin film magnetic heads that are independently formed and coupled to each other are configured such that the extended surfaces of the thin film forming surfaces intersect each other.