SU832581A1 - Device for recording video signal onto magnetic tape - Google Patents

Description

one

The invention relates to magnetic recording, in particular, to devices for recording a video signal on a magnetic tape, and can be used in video recorders.

A device for recording a video signal on a magnetic tape is provided comprising a guide drum, above the working surface of which, coupled with a magnetic tape, is the working surface of the magnetic head, the core of which is fixed on the rotating element with the guide drum t4 movable in the gap gap. line recording of a video signal onto a magnetic tape and its reproduction from it.

A disadvantage of the known device is the low strength of the core of the magnetic head.

It is also known a device for recording a video signal on a magnetic tape containing a guide drum, above the cylindrical working surface of which is coupled to a magnetic tape, is the working surface of the magnetic head, the magnetic core of which is fixed on the rotating element with the possibility of moving the guide drum and made with a circular cylindrical cutout, located symmetrically on one side of the working gap of the magnetic head 2. This device allows for relatively high strength of the magnetic core of the magnetic head.

The lack of such a device

0 is a significant error in the result of recording a video signal on a magnetic tape.

The purpose of the invention is to reduce

5 errors result of recording a video signal on a magnetic tape.

The goal is achieved by the fact that the magnetic core is made on the side of the working surface of the magnetic head with a cone-shaped face, the height of which is equal to the depth of the circular cylindrical tube. With this, the angle between the forming cylindrical working surface of the guide drum

5 and the surface of the cone-shaped chamfer is equal to 2a

Arctg -jj-,

where H is the width of the slotted gap of the guide drum;

and - a departure of a working surface

magnetic head over the cylindrical working surface of the guide drum. FIG. 1 shows one of the possible variants of the proposed device for recording a video signal on a magnetic tape; in fig. 2 - magnetic head. The device comprises a guide drum 1, above the cylindrical working surface 2 of which, adjoining to the magnetic tape, the working surface 3 of the magnetic head is located. The magnetic core 4 of the magnetic head is mounted on the rotational element 5 with the possibility of movement in the slotted gap 6 of the guide drum 1. The magnetic core 4 of the magnetic head is made with a circular cylindrical notch 7, which is positioned electrically on one side of the working gap 8 of the magnetic head. The magnetic core 4 is made on the side of the working surface 3 of the magnetic head with a cone-shaped chamfer 9, whose height is equal to the depth of the circular cylindrical cut-out 7. The angle between the generator of the cylindrical working surface 2 of the direction of the drum 1 and the surface of the cone-shaped chamfer 9 is equal. Arc tg-, where H is the width of the slotted gap 6 of the equalizing drum 1; .a - departure of the working surface 3 of the magnetic head above the cylindrical working surface 2 of the guide drum 1. During recording and playback, the magnetic core 4 of the magnetic head moves in the slit gap b of the guide drum 1, ensuring that its working surface 3 mates with the magnetic tape . The presence of a cone-shaped chamfer 3 on the magnetic core 4 ensures a secure fit of the magnetic tape to the working surface 3 of the magnetic head.

Claims (2)

The present invention allows to significantly reduce the error of the result of recording a video signal on a magnetic tape. Apparatus of the Invention: A device for recording a video signal on a magnetic tape containing a guide drum, above a cylindrical working surface of which is coupled to a magnetic tape, is a working surface of the magnetic head, the magnetic core of which is fixed on the rotating element with the possibility of movement of the guide drum in the slot gap and made with a circular cylindrical cutout, located symmetrically on one side of the working gap of the magnetic head, which is different in order to reduce the error of the recording result, the magnetic core is made on the side of the working surface of the magnetic head with a cone-shaped chamfer whose height is equal to the depth of the circular cylindrical cut, and the angle between the generator of the cylindrical working surface of the guide drum and the surface of the cone-shaped chamfer is Arc tg where H is the width of the slot gap of the guide drum; a is the overhang of the working surface of the magnetic head above the cylindrical working surface of the guide drum. Sources of information taken into account in the examination 1. Japanese Patent No. 50-12729, cl. 102 E 215.1, 1975. 2. Japanese Patent No. 52-19765, cl. 102 E 215.1, 1977 (prototype). CtiuS.1 FIG. 2