JPS6233311A - Magnetic head - Google Patents

Abstract

PURPOSE:To prevent deterioration of tape contact by giving a winding to position deviated in forward/backward direction for adjacent cores of a head chip constituting a main head chip and a sub head chip. CONSTITUTION:Coils 10a, 10b wound to a main head inner core 2a and a sub head inner core 3a are wound in a way that the fitting position of the inner cores 2a, 3a is deviated in forward/backward direction so as not to contact the coils 10a, 10b together. Since a gap G2 between the main and sub inncer cores 2a, 3a is formed to a small value, the gap between the main and sub head chips is small so as to minimize the drawing quantity H2 of a tape 7 in the gap in comparison with a quantity H1 and the pushing-up of the tape 7 by the sub head chip 3 is facilitated. Thus, the space loss of the sub head chip 3 at the gap 9 is eliminated and the tape 7 contacts sufficiently the gap 9 to keep the tape contact in an excellent way.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a magnetic head for electronic still cameras, PCM recorders, VTRs, and the like.

<Prior art> For example, small VTRs such as 8 mm VTRs and 174 inch VTRs
1/2 inch VTR also applies to TR and PCM recorders.
Although special playback functions (still, slow, etc.) have been added to improve the image quality during playback, as the magnetic tape used is metal tape, the magnetic head is The material used for the head chip is an alloy such as amorphous or seven dust. The structure is shown in FIG. 4. The combination magnetic head 1 has a main head chip 2 and a sub head chip 3 arranged in parallel on a head base 4.
A coil 5 is wound around the coil 3 and arranged with a predetermined gap G1. Here, since each of the main and sub-herad chips 2 and 3 is alloy-based, the output is lower than that of conventional ferrite-based chips, so in order to compensate for this small output and increase the output, a large number of coils 5 are wound. It is something. Therefore, the amount of protrusion of the coils wound around the inner cores 2a and 3a of each main and sub head chips 2 and 3 is small. It is necessary to prevent short-circuiting due to contact between the main and sub-head chips 2 and 3, which is a factor in setting a large gap G1 between the adjacent inner cores 2a and 3a. It had become.

<Problem to be solved by the invention> However, the gap G between the main and sub head chips,
can be increased by increasing the number of coil turns.
As shown in the figure, when looking at the state of contact of the tape 7 with the main and sub-head chips 2 and 3 protruding from the upper drum window 6, if the gap G is large, the tape 7 is in contact with the main head chip 2.
After making contact with the tape 7, the tape 7 is drawn into the crevice by an amount indicated by H7, and then the tape 7 is pushed up by the sub head chip 3, but the tape 7 does not come into close contact with the chip surface by the time it reaches the sub head chip 3, and the sub head chip 3 A space loss g occurs in the chip portion, and a state occurs in which the tape 7 does not come into contact with the gap 9 of the sub-head chip, resulting in a problem that the contact between the tape 7 and the sub-head chip 3 deteriorates.

An object of the present invention is to provide a combination type magnetic head that solves the above problems.

<Means for Solving the Problems> Therefore, in order to prevent deterioration of tape contact in the sub-head chips of a combination type magnetic head, the present invention provides The core windings are wound at positions opposite to each other.

Effect〉 Since the windings of adjacent cores are wound one behind the other, this is the main feature of a combination type magnetic head.
Each sub-head chip can have a gap equal to the thickness of the coil winding of one of the cores, and as a result, the gaps 8 and 9 between the main and sub-head chips 2 and 3 can be set to a predetermined distance. In addition to being able to maintain accuracy, the tape sufficiently contacts the sub-head chip, and space loss g in the gap 9 is eliminated.

<Embodiment> Next, an embodiment of a combination type magnetic head according to the present invention will be described.

FIG. 1 is a partial plan view showing the state of coil winding, and FIG. 2 is an enlarged view of the main part of the state in which the tape is in sliding contact. 3 are arranged in parallel to the head base 4, and here, the main head inner core 2
a and the coil 10 wound around the subhead inner core 3a.
The coils a and 10b are wound so that the mounting positions of the inner cores 2a and 3a are shifted from each other in the front-back direction, and the coils lQa and 10b are arranged so that they do not come into contact with each other. The gap G2 between the main and sub inner cores 2a and 3a is made smaller than in the conventional example without reducing the coil windings of the main and sub inner cores 2a and 3a.

Therefore, the gap G2 between the main and sub inner cores 2a and 3a
As shown in Figure 2, the gap between the main and sub-head chips is small, and the amount H2 of the tape 7 pulled in between them is extremely small compared to the conventional example H8. As a result, the tape 7 can be easily pushed up by the sub-head chip 3, there is no space loss in the gap 9 between the sub-head chip 3, and the tape 7 can be brought into sufficient contact with the gap 9. Good p1 tape contact is maintained.

Next, FIG. 3 shows another embodiment of the present invention. In the figure, a combination type magnetic head 1b has inner cores 2a of main and sub head chips 2 and 3 disposed on a helad pace 4. , 3a with coils 10a, 10b
are wound with their positions shifted back and forth relative to each other, and each inner core 2a is wound at the winding portion of each inner core 2a, 3a.
, 3a are provided with four parts 11.12 on opposite sides, in which the coil 10a is placed.

10b is wound, thereby making it possible to further reduce the gap G3 between the inner cores of the main head chip 2 and the sub-head chip 3.

<Effects of the Invention> As described above, according to the combination type magnetic head of the present invention, the main head chip and the sub-head chip, which are integrally attached to the head base, have their inner core coils at positions shifted back and forth from each other. Because the wire is wound in
Since the gap between each inner core is small, the tape must be in close contact with each gap of the main head chip and the sub head chip, and the image quality during special playback can be 9E image quality. In addition, it is possible to provide a magnetic head with sufficient output.

[Brief explanation of the drawing]

Fig. 1 is a partial plan view showing one embodiment of the present invention, Fig. 2 is an enlarged view of main parts showing its working state, Fig. 3 is a partial plan view showing another embodiment, and Fig. 4 is a partial plan view showing an embodiment of the present invention. FIG. 5 is a partial plan view showing the conventional example, and an enlarged view of the main part showing the operating state of the conventional example. DESCRIPTION OF SYMBOLS 1, la, lb... combination type magnetic head, 2... main head chip, 2a... main head inner core, 3...-sub head chip, 3a... sub head inner core, 4... ...Head base, 5, 10
a. 10b...Coil. Figure 1 Figure 2

Claims (1)

[Claims] In a combination type magnetic head integrally equipped with a head chip consisting of a main head chip and an auxiliary head chip, the windings of adjacent cores of the plurality of head chips are wound at positions opposite to each other. Features a magnetic head.