JPS6312406Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an erasing head device having multiple gaps for efficiently erasing a high coercive force tape with a small erasing current, and improves the erasing efficiency by improving the contact pressure of the tape at the gap part. It was designed to increase it.

First, a conventional erasing head device will be described with reference to FIGS. 1 and 2. In FIG. 1, 1 is the main body of the erasing head device, 2 is its core, 3 is the recording/reproducing head main body, 4 is the core, and 5 is the magnetic tape. FIG. 2 shows the inside of the main body 1 of the erasing head device, where 6 is a terminal, 7 is a terminal holder that also serves as a winding frame, and 8 is a winding wire. The core 2 is formed into a substantially E shape, and a right side core 2a, a left side core 2b, and a center core 2c are formed at the tip thereof, and gaps 9a and 9b are formed between these cores, and the gap 9a , gear spacer 10a to 9b,
10b is inserted.

When the magnetic tape 5 runs while contacting the front surface of the erasing head main body 1, since the front surface of the head is curved, the tape pressing force is greatest at the center of the head, that is, near the center of the central core 2c. The tape pressure force decreases as the tape moves away from this portion in the left-right direction. And gap 9
In the vicinity of a and 9b, contact with the magnetic tape 5 becomes relatively unstable, resulting in poor erasing efficiency.

The present invention is intended to simplify and improve such conventional drawbacks, and one embodiment thereof will be described below with reference to FIGS. 3 and 4.

In FIGS. 3 and 4, the same components as those in the conventional device shown in FIGS. 1 and 2 are given the same numbers, and the present invention has a vertical groove 11 in the center of the front surface of the central core 2c. It was formed.

By forming the groove 11 in the vertical direction in the front central part of the central core 2c, the groove 11
The pressing force of the magnetic tape 5 near the left and right edges of the gaps 9a and 9b increases.
The adhesion of the magnetic tape 5 at the portion 9b is increased, thereby improving erasing efficiency and stabilizing erasing performance.

As described above, the present invention has a simple configuration in which a groove is formed in the vertical direction at the center of the front surface of the central core, and the pressure force of the magnetic tape at the gap can be increased. This makes it possible to easily improve erasing efficiency and stabilize erasing performance, and the effects are significant.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the relationship between a conventional head device and a magnetic tape, FIG. 2 is an internal perspective view of a conventional erasing head device, and FIG. 3 is a top view of a gap portion showing an embodiment of the present invention. , FIG. 4 is a perspective view showing the relationship with the magnetic tape. 1... Erasing head device main body, 2... Core, 2
a, 2b...Side core, 2c...Central core, 5
...Magnetic tape, 9a, 9b...Gap, 11
……groove.

Claims (1)

[Scope of utility model registration request] Of the cores formed into an approximately E shape, a central core is wound with a wire, left and right side cores are opposed to each other on both sides of the distal end of the central core to form a gap, and a gap is formed on the front surface of the central core. An erasing head device with a vertical groove formed in the center.