SU1543465A1 - Device for contactless transmission of signals for video tape recorder - Google Patents

Abstract

The invention relates to instrument making and can be used in video recorders and digital tape recorders using an oblique-line recording method. The aim of the invention is to improve the quality of the transmitted signal. The device contains magnetic cores - fixed 3 and rotating 4, in the annular grooves of which windings 5,6 are installed. The conductors of the windings and their insulation are made in the form of a tape, the conductor being placed on one side of the insulating tape, on a part of its width on the side of the air gap. Conductor winding can be made of separate installed parallel strips. 1 hp f-ly, 4 ill.

Description

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The invention relates to instrumentation, in particular to magnetic recording apparatus, and can be used in video recorders and digital tape recorders using an oblique-line recording method.

The aim of the invention is to improve the quality of the transmitted signal.

Fig, 1 shows the conductor of the winding; FIG. 2 shows a device with a winding made in the form of a spiral winding of flexible metallized screws; fig.Z - node I in figure 2; and figure 4 - the same with multilayer on Yotka.

A thin metalized ribbon was used as a coil. The insulation conductor 1 of the tape passes along the insulating conductor 2 along the insulating tape 1. The width of the conductor is approximately one third of the total width of the tape. The tape is rolled into a roll on a cylindrical mandrel (not shown), after which the roll is held together (for example, by wiping it with an epoxy adhesive over the end). The resulting multi-layered ring-shaped helix is ready for installation in the Nas magnetic circuit.

The design of the contactless current pickup, schematically represented in FIG. 2, consists of the lower fixed 3 and the upper rotating

4 magnitoprovodov. On the front surfaces of the magnetic cores facing each other, annular grooves are provided. Wires are placed in the slots.

5 and 6. The windings are made of flexible metallized insulating tape coiled up. The width of the tape corresponds to the depth of the groove in the magnetic conductor. The printed conductor is on the edge of the tape, facing the gap. Rolled into a ring-shaped roll of tape, it is inserted into the corresponding groove where it is fixed (e.g., with epoxy glue). The ends of the printed conductor on the ribbon in the rotor magnet conductor are connected by means of a thin conductor.

(not shown) to the rotating video heads, and on the stator magnet core - to the electrical circuit of the video recorder.-When the rotary magnetic core rotates, the connection between the rotating video heads and the electrical circuit of the video recorder provides

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with thanks to the magnetic flux in the gap between the magnetic cores.

Performing the winding in the form of several parallel tracks 7 allows the electrical characteristics of the circuit to be significantly improved. So, when a rotating transformer with a transfer ratio from rotor to stator winding is greater than one, in recording mode, the required load capacity of the recording amplifier operating on the winding with a large number of turns (and therefore with a large inductive resistance) decreases, and in playback mode due to signal transmission From video heads to playback amplifiers with intermediate amplification, the signal-to-noise ratio is improved.

In order to ensure the flow of current through the multilayer printed winding in the required direction, the end of the first printed conductor is connected to the beginning of the second, the end of the second pro- / conductor is connected to the beginning of the third, etc. for example, fused conductors, not shown). The decrease in the load capacity of the stator winding due to a decrease in the width of the conductors is not significant, since, due to an increase in the number of turns obtained, its inductive resistance increases and the current passed through it decreases. At the same time, the recording current through the rotating video heads remains at the same level due to its increase in the value of the transformation ratio.

This structure creates the possibility of significantly reducing the gap and alignment of the coils in the horizontal plane with an accuracy close to absolute. This is ensured by the fact that after the end of the assembly of the magnetic cores, it is now possible to further polish their front surface. At the same time, both the magnetic cores and the protruding edges of the winding are treated equally and equally. By placing the rotor and stator magnetic circuits on a single axis, even planar-parallel grinding of the halves of the contactless current collector can be performed

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Claims (2)

Claim 1. A device for contactless signal transmission for a VCR, containing the stator and rotor magnetic circuits in the form of rings, on the facing surfaces of which are installed with a gap, ring grooves are made, in which the windings from an insulated conductor are located, hereinafter that, in order to improve the quality of the transmitted signal, the winding conductors and their insulation are made in the form of a tape, and the conductor is placed on one side of the electrical tape on a part of its width from the side of the air gap a. 2. The device according to claim 1, characterized in that the conductor is made in the form of separate stripes arranged in parallel — 15. (Riga