SU1129650A1 - Combined head stack - Google Patents

Abstract

COMBINED MAGNETIC HEADS UNIT containing multi-track magnetic recording and reproduction heads placed in an outer magnetically flexible material screen, which have half-cores, windings and inter-head screens which are placed in interconnected non-magnetic clips - two side and a common central one consisting of two half-frames separated an interunit shielding pad of magnetically flexible material, characterized in that, in order to increase the immunity of the unit, its manufacturability in the manufacture and luatation, the half-cores of the multi-track magnetic reproduction head are made symmetrical, the common central cage is made asymmetrical with the inter-block shielding pad displaced towards the multi-track magnetic recording head, and the outer screen is made of two, through the inter-block shield pad, the parts with T-shaped slots, the T-shaped slot has two slots, and the T-shaped slot has two slots through the inter-block shield, the parts with T-shaped slots, and the T-shaped slot has two slots, the T-shaped slot has two slots; , and the interconnect shielding gasket is 9 with two base face surfaces perpendicular to each other. You (A Stepping over the outer shield on the side opposite the base and the working surface of the block. HS; O5 JV

Description

The invention relates to instrumentation, in particular to a magnetic recording technique. A block of combined magnetic heads is known, containing separately made magnetic recording and reproducing heads placed in a common screen, and then, in order to obtain the required accuracy, aligned with respect to each other by the slope of the working gaps and their location in the direction of the length of the working gap 1.

However, this block of combined magnetic heads is not very suitable for mass production due to the large labor intensity of the alignment process.

The closest to the technical essence is a block of combined magnetic heads containing a two-sided central half block with a screen common to both heads, two side half blocks that adjoin on both sides to a double side central half block and forming gaps on the one side of the connector, and on the other side of the recording heads, and the outer screen 2.

In this block, all screens located in the immediate vicinity of the semi-hearts and protruding to the working surface of the block are higher or lower than the working gaps, continue only up to the line of working gaps or have a joint on these lines. This leads to an increase in the penetration of the recorded signal from the recording heads into the reproducing heads, since such screens, because of the high magnetic resistance of the joints, weaker the side field of the gap of the gap of the heads. In this block of combined magnetic heads, the penetration increases due to the insufficient length of the inter-head screen, which is inserted into the groove of the double-sided central semi-block and limited in length, and does not completely separate the heads and winding leads.

In addition, such a head has an unacceptably low noise immunity due to the absence of a continuous shielding of the working surface of the reproducing heads, as well as the asymmetry of their half-cores.

Finally, no base surfaces are provided in the specified head assembly to achieve the required head manufacturing accuracy.

The purpose of the invention is to increase the noise immunity of the unit, its manufacturability in the manufacture and operation.

The goal is achieved by the fact that a block of combined magnetic heads containing a screen placed in an outer magnetically soft material, multi-track magnetic recording heads and

reproduction, half-hearts, windings and inter-head screens of which are placed in interconnected non-magnetic holders — two side and common central, consisting of two half-strips, separated by an interunit shielding pad of magnetically soft material; half-cores of a multi-track magnetic head of reproduction are made symmetrical, they have a common central body. asymmetric with offset interblock shielding gasket in the direction of the multi-track magnetic recording head, and the outer screen is Flax of two, closed through an inter-block shielding gasket, parts with T-shaped slots on the front surface, and the interconnect shielding gasket is made with two base surfaces perpendicular to each other, protruding above the outer shield from the sides opposite to the base and the working surface of the block.

On fi1. 1 shows the proposed block of combined magnetic heads, general view; in fig. 2 - view of the assembled unit with

5 screens; in fig. 3 - the main units of the block.

The block of combined magnetic heads contains a two-sided central clip 1 for the magnetic recording and reproducing magnetic heads;

 a composite of a narrow half-arm 2 for recording heads with half-cores 3 not containing windings, and a wider half-arm 4 of reproduction heads with half-cores 5 containing windings, and between said half-frames

5 there is an interblock shielding gasket 6 made of magnetic material. On one side, a two-sided central cage 1 is connected to a cage 7 of reproduction heads comprising

0 inside the half-cores 8 with a winding, and on the other hand - the holder 9 recording heads, also containing inside the half-cores 10 with a winding, and the half-cores 8 are made symmetrically to the half-cores

with 5, and the half-hearts 10 are asymmetric half-hearts 3.

In addition, the combined head unit contains two outer screens 11 and 12 (Fig. 2 and 3) with T-shaped grooves 13 0 on the working surface. Exterior screens I and 12 are on both sides adjacent to an inter-unit shielding gasket 6 made with protruding parts from the side of terminals 14 and from the side opposite to the base 15, with the ends 16 and 17 of the protruding parts being base surfaces. The first base surface is located at the end 17 of the gasket 6, stands from the side of the conclusions

14 and is parallel to the working surface, and is also at a predetermined distance from it, and the second base surface is located at the end 16 of the gasket 6, perpendicular to the first end part and protrudes from the side opposite to the base 15.

A unit of combined magnetic heads is assembled and installed in a tape recorder, adjusted. The interblock gasket 6 in the form of a plate having a first end portion 17, protruding beyond the dimensions of the outer screens 11 and 12 towards the conclusions of the block of magnetic heads parallel to the working surface of the block and located at a predetermined distance from it, allows you to accurately install the half-cores 3.5 , 8 and 10 into a double-sided central cage 1 in the direction perpendicular to the forming surface of the working surface, and to precisely maintain a predetermined depth of the working gaps when machining the working surface of the block, since the first front part is basis for these operations.

The second end portion of the gasket 16, protruding beyond the dimensions of the outer screens 11 and 12 in the direction opposite to the base 15, being perpendicular to the first and being at a predetermined distance from the lower half-cores 3,5,8 and 10, serves as a base for slotting half-cores 3,5,8 and 10, a base for mounting the tape guides 18, as well as a base for aligning the head against the magnetic tape.

At the same time, the protruding parts of the gasket 6 reduce the penetration of the recording head into the reproduction head due to the magnetic fluxes of the scattering head, and the arrangement of the interblock cushion 6 not in the center of the head allows symmetrical half cores 5 and 8 to be used in the reproduction head, which significantly increases the noise immunity of the head external magnetic fields.

The special T-shape of the grooves 13 on the side of the working surface of the outer screens 11 and 12 also contributes to this. In addition, with this groove shape 13, the magnet is a soft, highly permeable material

external screens 11 and 12 shunts the magnetic flux of the phonograms located above the working gaps and reduces the level of penetration from the adjacent recording tracks.

Thus, in the proposed block of combined magnetic heads, the manufacturing accuracy is significantly increased due to the formation of a single base surface at the end parts of the inter-head gasket, used as reference points as in the manufacturing process,

assembly and control of individual parts and assemblies and the unit as a whole, and during its adjustment in the tape recorder.

At the same time, the inter-head shielding gasket together with external screens containing T-shaped grooves

forms, serves to reduce the level of penetration from the recording heads: in reproducing, to reduce the level of interference in the reproducing heads and the level of penetration from adjacent tracks.

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Claims (1)

BLOCK OF COMBINED MAGNETIC HEADS containing a screen placed in an outer screen made of magnetically soft material, multi-track magnetic recording and reproducing heads, half-cores, windings and inter-head screens of which are placed in interconnected non-magnetic clips - two side and a common central one, consisting of two half-holes, separated by inter-block screens gasket made of soft magnetic material, characterized in that, in order to increase the noise immunity of the unit, its manufacturability in the manufacture and operation The half-cores of the multi-track magnetic playback head are symmetrical, the common central cage is asymmetric with the inter-unit shielding strip shifted toward the multi-track magnetic recording head, and the outer screen is made of twoX) parts with T-shaped slots on the front surface moreover, the said inter-block shielding gasket is made with two basic end surfaces perpendicular to each other, protruding them above the outer screen from the sides opposite the base and working surface of the block.