JPH0581608A - Magnetic head device - Google Patents

Abstract

PURPOSE:To provide a magnetic head device having excellent dimensional accuracy of attachment of the magnetic head. CONSTITUTION:A chip carrier 9 with fixed head chips 11 each forming a prescribed magnetic gap 10 is fixed at a prescribed position of a tape guide 6 with resin guides 8 molded at both sides of a metal frame 7 in one body.

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 incorporated in a cassette tape recorder or the like.

[0002]

2. Description of the Related Art In a conventional magnetic head device of this type, as shown in FIG. 6, a magnetic head 2 is fixed to a tape guide 1 in which a magnetic material for shielding external noise is embedded in a resin, and the front surface of the magnetic head 2 is fixed. The magnetic tape 3 slides (for example, JP-A-3-122805). As shown in FIG. 7 which is a cross-section taken along the line AB of FIG. 6, it is composed of a tape guide 1 and a magnetic head 2 in which a magnetic material 4 for shielding external noise is embedded in a resin 5. Further, the tape guide 1 was formed by setting a plate material made of a magnetic material as shown in FIG. 8 inside a mold and injecting a resin.

[0003]

However, in the above-mentioned conventional structure, since the magnetic head is brought into contact with and fixed to the resin-coated tape guide, there is a problem that the mounting dimensional accuracy is poor.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and provide a magnetic head device having excellent accuracy in mounting dimensions of the magnetic head.

[0005]

To achieve the above object, a magnetic head device of the present invention has a tape guide having resin guides integrally formed on both sides of a metal frame and a predetermined magnetic gap. A chip carrier to which the configured head chip is fixed is provided, and the chip carrier is abutted and fixed to a predetermined position of the tape guide.

[0006]

According to the above construction, the guide is made of resin, and the metal frame of the tape guide and the chip carrier are directly fixed without resin.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 6 is a tape guide having resin guides 8 integrally formed on both sides of a metal frame 7 made of permalloy. Reference numeral 9 denotes a chip carrier made of stainless steel to which a head chip 11 forming a predetermined magnetic gap 10 is fixed. With such a structure, the chip carrier 9 is fixed to the tape guide 6 by first fixing the head chip 11 to the metal frame 7.
Was abutted on a predetermined position and fixed by spot welding at 12 points. Then, resin is injected into the gap between the head chip 11 and the tape guide 6 (not shown in the figure).

In the tape guide 6 of this embodiment, resin is integrally molded on both sides 7a, 7b of a metal frame 7 made of permalloy as shown in FIG. 2, and a resin guide 8 is provided as shown in FIG.
Is provided.

FIG. 4 is a perspective view of the head chip 11 fixed to the chip carrier 9 before being fixed to the tape guide.

As shown in FIG. 5, the side surface of the guide 8 has a surface abutting portion 14 with which the magnetic tape 13 contacts, and a first edge which guides both ends of the surface abutting portion 14 in contact with both ends of the magnetic tape 13. It has a pad portion 15 and a second edge pad portion 16, the first edge pad portion 15 is formed substantially perpendicular to the face pad portion 14, and the second edge pad portion 16 and the face pad portion 14 are provided. The inclined surface 17 having the inclination angle θ is provided between the two. Then, the side of the first edge contact portion 15 was used as a positioning reference for the chip carrier 9.

According to the magnetic head device of this embodiment, the following effects can be obtained. (1) Since the chip carrier made of stainless steel is brought into contact with the metal frame made of permalloy and fixed by spot welding, the mounting dimension accuracy of the magnetic head is improved.

(2) Since the guide is made of resin, it does not damage the magnetic tape. (3) By providing the guide with an inclined surface and using the first edge contact portion side as the positioning reference of the chip carrier, the mounting dimension accuracy of the magnetic head is improved, and when the magnetic tape is run, the magnetic tape is inclined by the inclined surface. The force that urges the vehicle upwards works, improving driving stability.

Although the chip carrier is made of stainless steel in the embodiment, the same effect can be obtained by using ceramic instead of it and fixing it by adhesion instead of spot welding.

Further, the same effect can be obtained by providing a curved surface portion having a smaller diameter from the surface contact portion toward the second edge contact portion instead of the inclined surface of the guide.

[0016]

As is apparent from the above description, according to the magnetic head device of the present invention, the following effects can be obtained.

(1) Since the metal frame of the tape guide and the chip carrier are directly fixed without resin interposition, the mounting accuracy of the magnetic head is improved, and since the guide is made of resin, the magnetic tape is not damaged.

(2) An inclined surface is provided between the surface contact portion and the second edge contact portion with the first edge contact portion side, which is substantially perpendicular to the surface contact portion of the guide, as the positioning reference of the chip carrier. As a result, the mounting dimension accuracy of the magnetic head is improved, the magnetic tape is not damaged, and the running stability is improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a magnetic head device according to an embodiment of the present invention.

FIG. 2 is a perspective view of the same metal frame.

FIG. 3 is a perspective view of the tape guide.

FIG. 4 is a perspective view of the head chip.

FIG. 5 is a sectional view of the same tape guide.

FIG. 6 is a perspective view of a conventional magnetic head device.

FIG. 7 is a sectional view of the same.

FIG. 8 is a perspective view of the same magnetic material.

[Explanation of symbols]

 6 Tape Guide 7 Metal Frame 8 Guide 9 Chip Carrier 10 Magnetic Gap 11 Head Chip 14 Face Contact Part 15 First Edge Contact Part 16 Second Edge Contact Part 17 Inclined Part

Claims (3)

[Claims] 1. A tape carrier having resin guides integrally formed on both sides of a metal frame and a chip carrier to which a head chip having a predetermined magnetic gap is fixed. The tape guide is provided at a predetermined position of the tape guide. A magnetic head device in which the chip carrier is abutted and fixed. 2. The magnetic head device according to claim 1, wherein the chip carrier is made of metal, and the chip carrier is fixed to a metal frame by welding. 3. The guide has a surface abutting portion with which the magnetic tape surface comes into contact, and first and second edge abutting portions for contacting and guiding both ends of the magnetic tape at both ends of the surface abutting portion. One edge pad is formed substantially perpendicular to the face pad, and the second edge pad has a certain inclined surface between the edge pad and the first edge pad. The magnetic head device according to claim 1, wherein the side of the portion is used as a positioning reference for the chip carrier.