JPS6343613Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a magnetic head for a VTR, etc., in which a magnetic recording/reproducing head, an erasing head, and a mounting base are securely fixed with high precision. It is.

<Prior Art> Conventionally, as shown in FIGS. 1 and 2, in this type of magnetic head, a recording/reproducing head 02 is fixed to the side surface of an erasing head 01 with adhesive or screws 03, and then the head is attached to a mounting pedestal. 2 through screw 05 to 04
However, it takes a lot of man-hours to install the erasing head 01 and the recording/playback head 02 and the recording/playback 02 and the mounting base 04, and it is easy for errors to occur in the mounting position, so it is difficult to install with high precision. The problem was that I couldn't do it. For this reason, the position of the gap formed on the tape running surface of the magnetic head and the track width of the tape does not match accurately, causing erasing errors and causing noise. I couldn't help it.

<Means for solving the problem> The present invention was developed in view of the above-mentioned circumstances, and in order to accurately mount the magnetic head at right angles to the mounting base, a positioning convex portion is provided on the mounting surface of the erasing head. At the same time, tap holes for mounting screws are formed on the mounting surface of the recording/playback head, and positioning recesses and mounting holes for screws are provided at the corresponding positions of the pedestal on which the magnetic head is mounted, so that it is always stable with respect to the mounting pedestal. The present invention provides a magnetic head that enables assembly of the magnetic head.

〈Example〉 Hereinafter, examples according to the present invention are shown in Figures 3 to 4.
This will be explained in detail based on the figures. In the figure, 1 is an erasing head, 2 is a recording/reproducing head, and the pedestal mounting surface of the erasing head 1 has a positioning convex portion 1a.
are integrally molded.

The positioning convex portion 1a is injection molded integrally with a case body made of resin, ceramic, or the like that forms the erasing head 1.

Further, a tapped hole 2a into which a screw 3 is screwed is bored in the pedestal mounting surface of the recording/reproducing head 2 which is fixed to the side surface of the erasing head 1.

On the other hand, the erasing head 1 and the recording/reproducing head 2
The mounting pedestal 4 on which the head is mounted is provided with a positioning recess 4a and a mounting hole 4b for the screw 3 at positions corresponding to the positioning convex part 1a of the erasing head 1 and the tab hole 2a of the recording/reproducing head 2, respectively. .

Therefore, when the erasing head 1 and the recording/reproducing head 2 formed as described above are to be fixed to the mounting base 4, it is necessary to fix the erasing head 1 and the recording/reproducing head 2 with adhesive or the mounting screws 5 in advance. Next, the positioning convex portion 1a of the erasing head 1 is fitted into the positioning recess 4a of the mounting base 4, and the tap hole 2a of the recording/reproducing head 2 and the mounting hole 4 of the mounting base 4 are fitted.
b, and tighten and fix with screws 3.

If the erasing head 1 is made of a resin molded body as in this embodiment, no special cost or man-hours are required for providing the convex portion 1a. On the other hand, the recording/playback head 2
Since the polarity of SN must be ensured well,
A metal shield case is used, but it is difficult to provide a rectangular protrusion on the bottom surface of the case. Although the tap hole 2a can be easily opened, it is not appropriate to provide a tap hole in the erasing head 1 made of resin or ceramic. In this way, in this embodiment, the erasing head 1 and the recording/reproducing head 2 can be assembled together with high precision and convenience.

<Effects> As explained in detail above, the magnetic head according to the present invention has a positioning convex part provided on the pedestal mounting surface of the magnetic head that fits into a positioning recess formed at a predetermined position on the pedestal, and a magnetic head. Align the mounting hole of the mounting base with the tap hole formed in the head,
It has a simple structure that is fixed via screws, and there is no lifting when it is installed on the mounting pedestal, and it is securely positioned and installed, so it does not rotate on the mounting pedestal and the gear of the magnetic head is fixed. and,
The track width of the tape is set with high precision, and a high quality magnetic head can be obtained.

Further, the number of man-hours required for attaching the magnetic head to the mounting base is reduced, work efficiency and productivity are improved, and manufacturing is possible at low cost.

As described above, in the present invention, when the erasing head and the recording/reproducing head are integrated, the recording/reproducing head side, which requires stricter positional accuracy, is fixed to the pedestal with screws. By using the convex portion for indirect positioning on the erasing head side, which does not require strict positional accuracy compared to the above, it is possible to satisfy both positioning accuracy and assembly work efficiency.

[Brief explanation of drawings]

Fig. 1 is a front view showing a conventional embodiment, Fig. 2 is a bottom perspective view of Fig. 1, Fig. 3 is an exploded perspective view showing an embodiment according to the present invention, and Fig. 4 is an assembled state according to the present invention. FIG. 1...Erasing head, 1a...Protrusion for positioning,
2...recording/playback head, 2a...tap hole, 3
...screw, 4...mounting pedestal, 4a...positioning recess, 4b...mounting hole.

Claims (1)

[Scope of utility model registration request] In a magnetic head such as a VTR in which a recording/reproducing head is fixed to the side surface of the erasing head, a positioning convex portion is formed on the pedestal mounting surface of the erasing head, and a fixing screw is formed on the pedestal mounting surface of the recording/reproducing head. The mounting base for the erasing head and recording/playback head is provided with a tap hole into which the erase head and recording/playback head are screwed.
A magnetic head characterized in that a positioning concave portion and a screw mounting hole are formed corresponding to the positioning convex portion of the erasing head and the tap hole of the recording/reproducing head.