JPS60211611A - Composite magnetic head - Google Patents

Abstract

PURPOSE:To simultaneously record sound signals and video signals under superimposed conditions, by fitting magnetic heads respectively having an azimuth angle theta2 for sound and azimuth angle theta1 for video to one head-fitting plate under a condition of theta1<theta2. CONSTITUTION:A magnetic head for recording and reproducing video having an azimuth angle of theta1 and another magnetic head 2 for recording and reproducing sound having another azimuth angle of theta2 are fitted to a head fitting plate 1 under a condition of theta1<theta2. In this case, the tape pattern becomes that the track of video signals is superimposedly written on the track of sound signals. Moreover, two pieces of composite magnetic heads are fitted to a rotary drum in this invention, the magnetic head fitting processes can be shortened from conventional ones which require four pieces of magnetic heads to be fitted to one rotary drum. By using the two composite magnetic heads, sound signals and video signals can be recorded simultaneously under superimposed conditions.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a magnetic head that simultaneously records audio and video signals using a composite magnetic head.

[Background of the invention]

A conventional composite magnetic head will be explained with reference to FIGS. 1 and 6. The composite magnetic head has two head chips 2 and 3 attached to the head mounting plate 1, and the head gap enlarged view T of the head chips is as shown in Figure 6, and the azimuth angle of the mutual magnetic heads is A magnetic head having an azimuth angle V' completely opposite to the magnetic head V is attached. Specifically, the magnetic head V has an azimuth angle of +6°, and the head V' has an azimuth angle of -6°, and is used only for recording and reproducing video signals. magnetic head.

The magnetic head V' is composed of a read-only magnetic head.

[Purpose of the invention]

An object of the present invention is to provide a new composite magnetic head, that is, a composite magnetic head that simultaneously records audio signals and video signals in a superimposed manner.

[Summary of the invention]

This problem was solved by installing an audio magnetic head and a video magnetic head on the same Radbase.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 5. As shown in Fig. 1, magnetic heads 2°3 with different azimuths are attached to a head mounting plate 1, and the rotational direction side of the recording/reproducing head 2 for audio and the video recording/reproducing head 2 in the opposite direction to the rotational direction R are mounted on the head mounting plate 1. A recording/reproducing magnetic head 3 is attached. An enlarged view of the tape sliding part of the composite magnetic head according to the present invention is as shown in Figure 2 (■) and (■).
, −30°, and iJeθ1−−6°eθ, = −3C
P (7) It has an azimuth angle. A tape pattern recorded by a composite head having such a track is as shown in FIG. In other words, the track is obtained by overwriting and recording the video signal track A on the audio signal track A.

A rotary head drum using such a head is shown in FIG. According to the present invention, in contrast to the conventional rotary head drum in which four magnetic heads must be attached as shown in PXJ 5, two composite magnetic heads are attached as shown in Fig. 4. things are possible.

Furthermore, the application example equipped with the composite magnetic head of the present invention is shown in the seventh section.
This will be explained using figures. v, , v,' are θ1−± for video
It is a standard speed recording/playback head with a 6° azimuth angle.
Also V2. V2/ is a head for long-time recording and playback.
t' is a reproduction head for performing special reproduction, and A and A' are recording and reproduction heads having an azimuth angle of θ2=±60° for audio.

Here, the magnetic head V, , A and the magnetic head v1'8' are the composite magnetic head of the present invention, and V, V, "
is a conventional composite magnetic head. Standard speed record is A, V
, A/V, / for recording and playback, and A for long-time recording.
Recording and reproduction are performed using the respective heads V2', A'V, and V2'. In this case, four heads are sufficient. When configuring a system using conventional magnetic heads having a similar function, as shown in FIG. 8, six heads are required to be attached to each head.

〔Effect of the invention〕

According to the present invention, when recording audio signals and video signals in a superimposed manner, two helad bases of a composite magnetic head are attached instead of the conventional magnetic heads attached to four helad bases, so that the mounting position of the magnetic head is It is possible to shorten the unloading process to two times. (In the case of 4 heads) It is also advantageous in terms of economy because the machining required for mounting the magnetic head can be shortened. Further, as shown in FIG. 5, the height deviation H between the audio head and the video head (representing the chi in FIG. 3) is 0° in φ1 in the present invention, so H-4=G. In other words, in the composite head according to the present invention, since the height deviation H does not become very large, it is possible to process the track addition bits by distributing them to the center during head processing, and the height deviation can be easily adjusted. This can also be applied to FIG.

In addition, the present invention is carried out using magnetic heads with different angles in the same direction of θ = 30° and θ1-60, but depending on the case, θ,
It is also possible to attach heads in different directions such as ==-50° θ1=+6°.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the composite magnetic head of the present invention, FIG. 2 is an enlarged view of the sliding surface of the composite magnetic head of the present invention, FIG. 3 is an explanatory diagram of recording tracks in the composite magnetic head of the present invention, and FIG. FIG. 5 is an explanatory diagram of the operation of the rotary head drum tape running guide in the composite magnetic head of the present invention, FIG. 5 is an explanatory diagram of the operation of the rotary head drum tape traveling guide in a conventional head, and FIG. Enlarged view of sliding surface, No. 7
FIG. 8 is an explanatory diagram of the operation of an applied example of the present invention, and FIG. 8 is an explanatory diagram of the operation of a travel guide with a function equivalent to that shown in FIG. 7 using a conventional head. 1... Head mounting plate, 2... Audio recording/reproducing magnetic head, 3... Video recording/reproducing magnetic head, A... Audio recording/reproducing magnetic head (1 channel) A'.
... (2 channels) ■...Video recording/reproducing magnetic head (1 channel) V'.
・・ ・ (2 channels) ■2... Video recording and reproducing magnetic head (1 for long-term recording and reproducing)
(2 channels for long-time recording and playback) V:...Head for video special playback, θ1...Azimuth angle for video, θ2...Azimuth angle for audio. 1st 40th 6th Exit 71F]

Claims (1)

[Claims] (i) In a system in which signals for different purposes such as video signals and audio signals of a rotating magnetic head drum tape running guide are recorded and reproduced using magnetic heads with different azimuth angles, an azimuth angle θ2 for audio and an azimuth angle θ1 for video are used. A composite magnetic head characterized in that a magnetic head is mounted on a single head mounting plate in the relationship θ1<θ.