JPH0562117A - Magnetic head - Google Patents

Abstract

PURPOSE:To eliminate the need of a tape guide for guiding the running of tapes which is to be provided as separate parts from a magnetic head used for magnetic recording and reproducing devices and, at the same time, to prevent the transfer of dust from a magnetic tape to this magnetic head. CONSTITUTION:Groove-like recessed sections are formed on the surface 2 of a magnetic head body 1 which is brought into contact with a magnetic tape 3. The radius of curvature R1 of the surface 2 in the tape running direction is constituted so that the tape 3 can come into contact with the entire area of the surface 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head for recording and reproducing signals on a magnetic recording medium tape of a magnetic recording / reproducing apparatus.

[0002]

2. Description of the Related Art Conventionally, a magnetic head of this type as an electromagnetic conversion element of a signal in a magnetic recording / reproducing apparatus is generally shown in FIGS. 3 (a), 3 (b) and 3 (c) in three views. As described above, the magnetic head body 1 is provided with tape guides 4a and 4b for traveling a magnetic tape (hereinafter, simply referred to as a tape) 3 at a fixed relative position on both sides before and after the tape traveling surface 1a. The curvature of the tape running direction is
As shown in FIG. 3B, the tape 3 is configured to have a radius of curvature R ₂ so that the tape 3 does not come into contact with the entire surface of the tape running surface 1a only at the central portion thereof.

[0003]

However, the following problems are associated with the above-mentioned conventional example. That is, 1) In manufacturing the magnetic head, the tape guide 4a is required as a separate component, and the magnetic head main body 1 must be accurately positioned and attached. 2) Dust (dust) adhering to the tape 3 adheres to the magnetic head 1 in the vicinity of the recording / reproducing gap of the head and grows to close the gap, resulting in spacing loss and “squeaking” of the tape, or There was a possibility that the tape would be cut due to the sticking of the tape.

The present invention has been made in view of the problems of the conventional example as described above, and does not require a conventional separate part such as a tape guide and can improve the adhesion of dust from the tape. It is intended to be provided.

[0005]

Therefore, in the present invention, the magnetic tape running surface of the magnetic head used in the magnetic recording / reproducing apparatus is formed into a groove-shaped concave surface, and the running surface has a curvature in the tape running direction. Is formed so that the magnetic tape on this surface runs along the curvature in the running direction, and the object is achieved.

[0006]

The magnetic head structure of the present invention as described above eliminates the need for the conventional separate component tape guide and improves the adhesion of dust from the magnetic tape.

[0007]

EXAMPLES The present invention will be described below based on examples. 1 (a), 1 (b), and 1 (c) show three views corresponding to FIG. 2 of one embodiment of the magnetic head according to the present invention. Reference numeral 1 is a magnetic head body as an electromagnetic conversion element of a signal, 2 is a running surface formed in a groove-shaped concave surface for running a magnetic tape 3 (hereinafter, simply referred to as a tape) as a recording medium, and R _{1 in} FIG. The tape 3 is the tape running surface 2 of the magnetic head 1.
Shows a radius of curvature such that the tape 3 slides in contact with and slides on the entire surface in the running direction of the tape. It is intended to be trimmed so that dust is not deposited near the head gap. Further, since it is concave, separate parts such as a tape guide are not required on both sides of the running surface 2 as in the conventional example, and the cost of parts and the number of mounting steps can be reduced. Furthermore, since the side edges of the tape 3 are guided over a wide area, damage to the tape 3 is also reduced.

(Other Embodiments) The traveling surface 2 of the above embodiment
There is no groove-shaped concave surface of the tape guide 4a
Even if the tape is attached, the adhesion of dust is improved even if the tape 3 only contacts the entire tape running surface 2 of the magnetic head 1. Further, when the tape running surface 2 is formed into a concave surface, at least one surface with which the side edge of the tape contacts is shown in FIG.
By inclining by the angle θ as shown in (a) and (c), it can contribute to stabilization of tape running.

Furthermore, FIG. 2 shows another embodiment of FIG.
(B) As shown in the equivalent view, the head 1 may have a plurality of grooves 2a provided on the tape running surface 2.

[0010]

As described above, according to the present invention,
The tape running surface of the magnetic head is formed into a groove-like concave surface, and the tape running surface has a curvature in the tape running direction so that the tape contacts the entire running sliding surface of the magnetic head. Can reduce the manufacturing cost and improve the adhesion of dust from the magnetic tape.

[Brief description of drawings]

FIG. 1 is a three-view drawing of an embodiment.

FIG. 2 is a view corresponding to FIG. 1 (b) of another embodiment.

FIG. 3 is a three-sided view of a conventional example

[Explanation of symbols]

1 magnetic head main body 2 groove-shaped concave tape running surface 3 magnetic tape R ₁ running surface radius of curvature of tape running direction

Claims (1)

[Claims] 1. A magnetic tape running surface of a magnetic head used in a magnetic recording / reproducing apparatus is formed into a groove-shaped concave surface, and the curvature of the running surface in the tape running direction is determined by the magnetic tape on this surface. A magnetic head characterized in that it is formed so as to run along a curvature in a direction.