JPS632982Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a magnetic head for a channel, and includes a front core, a back core,
The present invention also relates to a magnetic head with improved positioning accuracy when storing a coil or the like in a holder.

Conventionally, in this type of magnetic head, as shown in FIG.
The presser plate 4 supported by the presser plate 4 and the screws 5 provided on the presser plate 4
Generally, the tape running surface 1a of the front core 1 is pressed against the opening window of the holder 3.

However, in the conventional structure described above, as shown in FIG. 2, the holder 3 supports the presser plate 4 to butt the front core 1 and the back core 2, so the butt state cannot be monitored. There were drawbacks such as variations in impedance.

Furthermore, although the holder 3 and the presser plate 4 are formed separately and are fixed together using a fixing portion 6 or the like, it is difficult to position the screws 5 provided on the presser plate 4, so it is difficult to attach the back core 2 with the screws. 5, it was difficult to press it into a horizontal state.

This idea was made to improve the above-mentioned drawbacks of the conventional example, and especially when there are a large number of channels, the state of the abutting surface between the front core and the back core and the tape running surface of the front core can be adjusted to the opening window of the holder. To provide a magnetic head which can be accurately and easily assembled for a small multi-channel magnetic head which requires positioning accuracy such as accurate pressing.

Hereinafter, an embodiment according to this invention will be explained in detail based on FIG. 3. In the figures, parts and parts corresponding to those of the conventional example will be described with the same reference numerals.

FIG. 3 is a perspective view of the holder 3 according to this invention.
An opening window 3a for protruding is provided, and a vertical positioning hole 3b for stacking multiple channels is bored in the upper surface.

Inside the holder 3, there are a front core 1, a back core 2, and a coil bobbin 7 around which a coil is wound.
A fitting part 3c is formed so that a magnetic head part 8 consisting of the following is fitted, and a frame 3d extends from the side of the holder 3. On one side of the frame 3d, a back plate 3e that presses the magnetic head section 8 from the back surface of the holder 3 is integrally extended, and a convex caulking section 3f, for example, is formed at the tip.

Further, the other side of the frame 3d does not have a back plate, and has, for example, a concave caulking portion 3g formed at its tip so that the aforementioned caulking portion 3f fits therein. Further, a screw hole 9 for a screw 5 for pressing the magnetic head section 8 against the opening window 3a of the holder 3 is bored in the center of the back plate 3e extending from the frame 3d. The screw holes 9 are provided at two locations in order to press the magnetic head portion 8 in the horizontal direction, but it may be provided at one location.

Note that the holder 3 formed as described above is formed by integral drawing of straight brass or the like, and the positioning of each part can be formed accurately.

Therefore, the holder 3 formed as described above
When incorporating the magnetic head section into the frame 3d, fit the magnetic head section 8 into the fitting section 3c of the holder 3, and
Bend the back plate 3e at a right angle, fit the convex caulking part 3f at the tip into the concave caulking part 3g of the opposite frame 3d, and screw the screws 5 into the screw holes 9.
The tape running surface 1a is positioned in the opening window 3a of the holder 3 by pressing the magnetic head section 8 from the back side. In this case, the back surface of the back core 2 may not be directly pressed by the screw 5, but may be pressed using a leaf spring (not shown).

Further, the central portion of the back plate 3e extending from the frame 3d may be curved to provide a spring effect.

Further, although the back plate 3e is caulked at only one place, welding or other fixing means may be used.

As explained in detail above, in the magnetic head according to this invention, the magnetic head portion consisting of the front core, back core, and coil bobbin is easily assembled into a holder integrally formed by drawing processing, etc. The parts are accurately housed in the holder, improving the positioning accuracy of each part. Furthermore, the holder is integrally molded by drawing or the like, and has the advantage of being simple in structure and shape, and in which assembly work can be performed with high precision.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing a conventional magnetic head, Figure 2 is a sectional view showing a conventional magnetic head.
This figure is a perspective view showing the main parts of FIG. 1, and FIG. 3 is an exploded perspective view showing the magnetic head according to this invention. 3... Holder, 3a... Opening window, 3d... Frame, 3e... Back plate, 3f... Convex caulking part, 3
g...Concave caulking part, 5...Screw, 8...Magnetic head part, 9...Screw hole.

Claims (1)

[Scope of utility model registration request] In a magnetic head holder having an opening window for protruding the tape running surface of the front core, a frame body is provided extending from the side of the holder, and a screw hole is provided on one side of the frame body for pressing the magnetic head portion from the back side of the holder. A back plate having a perforation therein and a crimped part are integrally extended to the tip of the back plate, and the crimped part is formed so that the crimped part fits into the tip of the other frame, and the magnetic head is attached to the holder. When the parts are fitted together, the area near the back plate of the frame is bent at a substantially right angle to secure both caulked parts, and the magnetic head part is pressed by a screw screwed into a screw hole in a substantially central part of the back plate. A magnetic head characterized by comprising: