JPH02123514A - audio control head - Google Patents

Abstract

PURPOSE:To prevent influence due to space loss by dislocating a gap position to record and reproduce a signal in the direction of the projecting side of a magnetic tape to travel from the peak of the contour. CONSTITUTION:A center Q of a radius R of the contour of an A/C head 9 is positioned at a conventional place, and a peak 9d is also at the conventional place. On the other hand, the gap of centers 9a', 9b' and 9c' of core parts 9a, 9b and 9c is set to the position dislocated by 0.1 to 0.2'mm in the direction of the tape projecting side more than the position of the peak 9d of the contour. When a magnetic tape 2 is travelled in the direction of an arrow A, a magnetic powder peeled off from the magnetic tape 2 stays near the incident side from the peak 9d of the contour, but the position of the gap is positioned on the emitting side rather than the peak 9d of the contour, therefore, the generation of the space loss can be prevented beforehand.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an audio control head used in magnetic recording/reproducing devices and the like.

2. Description of the Related Art Conventionally, audio control heads (hereinafter referred to as A/C heads) for recording and reproducing audio signals and control signals have been constructed as shown in FIGS. 3 to 6, for example. It has been known.

FIG. 6 shows an example of a tape path of a magnetic recording/reproducing device,
The magnetic tape 2 in the cassette 1 is loaded into a predetermined position,
The magnetic tape 2 can run from the supply reel 5 to the take-up reel 6 by rotation of a pinch roller 4 pressed against the capstan shaft 3, and the erase head 7, rotating drum 8, A/C The magnetic tape 2 travels in the direction of arrow A via the head 9 during recording and reproduction.

The configuration of the A/C head 9 is shown in FIGS. 3 and 4, and 10 is an audio erasing head, which is integrated with the A/C head 9. As shown in FIG. Here, the A/C head 9 includes audio head core parts 9a and 9b (an example of a stereo head),
Equipped with a control core part 9C, each core part 9a, 9
A gap (not shown) for recording and reproducing a signal is formed at the centers 9a', 9b', and 9c'' of the A/C head 9. Also, a radius R at which the apex 9d of the outer circumference of the A/C head 9 is determined.
The machining center Q is the gap center 9a'9b'9c
' is located on the same line as '.

Problems to be Solved by the Invention However, in the conventional A/C head 9 described above, the magnetic powder attached to the magnetic tape 2 peels off during the travel path of the magnetic tape 2 from the supply reel 5 to the A/C head 9. It is impossible to avoid this, and in particular, peeling of the magnetic powder due to sliding with a rotating head (not shown) installed on the rotating drum 8 becomes noticeable. Furthermore, as shown in FIG.
2, resulting in the gap center 9a9b'
, 9c' are located on the same line as the center Q of the radius R of the outer shell, so the magnetic tape 2 and A are located at the gap position.
There is a problem in that a space loss occurs with the /C head 9, making it impossible to obtain the desired reproduction output. Also,
There was also a problem in that sufficient input could not be obtained during recording.

The present invention is intended to solve such problems, and aims to prevent the effects of space loss.

Means for Solving the Problems In order to solve this problem, the present invention shifts the gap position for recording and reproducing signals from the apex of the outer shell toward the exit side of the running magnetic tape.

Function: This configuration eliminates the influence of space loss caused by accumulation of magnetic powder peeled off from the magnetic tape, makes it possible to obtain sufficient input during recording, and to obtain desired reproduction output.

EXAMPLE Below, an example of the present invention will be explained using the drawings (Figs. 1 and 2).
The explanation will be based on Figure). In the drawings, the same reference numerals as in the conventional example indicate the same members.

In the figure, the center Q of the radius R of the outer shell of the A/C head 9 is located as before, and the apex 9d of the outer shell is also as before.

However, the centers 9a', 9b of the core parts 9a, 9b9c
The gaps ', 9c' are set at positions 0.1 to 0.2 recessed in the direction of the tape exit side from the position of the apex 9d of the outer shell.

In the above configuration, the magnetic powder separated from the magnetic tape 2 traveling in the direction of arrow A in FIG.
Since it is located on the exit side (away from the magnetic powder accumulation part), space loss can be prevented from occurring.

Effects of the Invention As described above, according to the present invention, the influence of space loss caused by accumulation of magnetic powder that does not peel off from the magnetic tape is eliminated, sufficient input can be obtained during recording, and the desired reproduction output can be achieved. You will be able to obtain

[Brief explanation of drawings]

1 and 2 show one embodiment of the present invention, FIG. 1 is a plan view of the A/C head, FIG. 2 is a front view of the same, and FIGS.
Fig. 6 shows a conventional example, Fig. 3 is a plan view of the A/C head, Fig. 4 is a front view of the same, Fig. 5 is an enlarged view of the main part of Fig. 3, and Fig. 6 is during magnetic recording and reproduction. FIG. 2...Magnetic tape, 9...A/C head, 9a. 9b, 9cm・-core part, 9a′, 9b′, 9c・
...Center, 9d...Vertex.

Claims (1)

[Claims] 1. An audio control head for recording and reproducing audio signals and recording and reproducing control signals, in which the gap position for recording and reproducing signals is shifted from the apex of the outer shell toward the exit side of the running magnetic tape. head.