CS213833B1 - Magnetic multitrack ferrite head - Google Patents

Description

The present invention relates to a magnetic multi-track ferrite head primarily intended for recording and sensing shorter wavelength signals onto a magnetic carrier.

The existing construction of magnetic multi-track alloy heads cannot be used in the manufacture of magnetic heads from ferrite materials, where the actual working slits of the heads are created by soldering the magnetic ferrite circuits by glass solder. Such multi-track heads realized simply by shifting the individual magnetic circuits side by side can only be used in rare cases where the head first records the signal itself and then reads it itself and when the recorded carriers are not to be confused.

The above-mentioned drawbacks are eliminated by the construction of a magnetic multi-track ferrite head, which consists in that the head is composed of three units, namely the front part of the pole pieces with working slits in one line without any angular deviations, the middle part of the magnetic needles with wound coils. from the rear screen with holes for individual coil outlets. All three parts are connected to each other by internal and external reinforcing shielding plates.

The magnetic multi-track ferrite head of this construction allows simultaneous recording or sensing of four or wolf tracks on a 6.25 mm wide carrier, has improved resolution and, with a suitable magnetic tape 1, has a longevity. This magnetic multi-track ferrite head is suitable for mass production due to its realization from individual parts.

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By consistently inserted in-process control, it is possible to discard defective parts in time, which would invalidate the final, very laborious »

In the accompanying drawings, an example of a magnetic ferrite head construction is shown, wherein in FIG. 1 is a cross-sectional view of a magnetic head with a pole piece front part 1, a magnetic needle part 2 and a back screen part 2 with ⁸ holes 8 for terminals J and with a groove with a glued double-sided printed circuit board.

The front part of the pole pieces 1 is connected by means of the outer connecting shield plates J via the separating plane 4 to the central part of the magnetic pins and the set shielding part 2 »On the middle part of the magnetic pins and the rear shielding part 3 Fig. 3 shows cut-outs in a brazed block of suitably shaped ferrites 16 with internal secretion plates 12, which form pole extensions of the individual tracks X 1, with the working slots 11 in line with the angular deviations. Fig. 4 shows the front part of the pole pieces 1 with the untrimmed technology piece 16 with the pole pieces of the individual tracks 10 and the glued packs of the side exchanger plates 16 and the side shield plates 17 and the internal reinforcement of the shield plates 18. from the two slots of ferrite 22 with a groove and from a slice of ferrite 20. From the block thus assembled, the individual rear shielding parts 3 can be cut off according to the indicated cutting line 22. FIG. the outlet plate 8 and the holes 8 for the eyelet outlets. FIG. 7 shows a block composed of ceramic wafers 22, the shielding plates 23 ^of the beams ⁸ 24. ceramics which can be marked rovineaď sectional cut the individual blanks 3p portion of the magnetic yokes g · Fig. 8 shows a blank part of the magnetic yokes ⁸⁸ g four Fig. 9 a> shows a block of ferrite in shape C g $ a with two glued ceramic plates 2 from which individual cuts 2Z can be cut off by means of sections 2Z 9b), to which the coils gg are wound. FIG. 10 shows the connection of a piece of magnetic needles 2, ⁸ glued by its own magnetic yokes gg and coils 2g and with a rear shielding part 2 consisting of slices of ferrite 1g. of ferrite slice gO and of double-sided printed board of terminals 6, to which internal shielding plates 6 are glued on both sides.

The magnetic multi-track ferrite head shown in the four-track version versus 6.25 au ae has a width of 0.6 mm and consists of three main parts, namely the front part of the pole pieces 1, the magnetic needle part 2 and the rear shielding part 2 » which are connected to each other through the polished contact surface g, in one piece by means of two outer connecting shield plates.

The front part of the pole pieces 1 is composed of four pole pieces 22 and 16, respectively. The exchanger plates 16 and the side shield plates 11 are inserted from the inner exchanger plates 22 and to which the internal reinforcement shield plates 2S are glued on both sides.

The part of the magnetic needles is composed of two slices of ceramic gg, five shielding plates 22 and eight beams of ceramic gg. Sty3 is placed in the grooves in the ceramic plates

213 833 with its own magnetic yoke 2fi with wound coils 29 and ceramic plates 26 ·

The rear shielding member is made up of two slots of ferrite lg with grooves for the outlets and a slice of ferrite 20 with groove in which the double-sided printed circuit board of the terminals 6 is glued. The front part of the pole pieces 1, together with the part of the magnetic needles 2 and the rear shielding part 8, are connected by two outer connecting shielding plates J to the polished contact surface 8 ».

Claims (1)

Magnetic multi-track ferrite head assembled from the front pole piece with the working slots in one line, the magnetic needle part and the rear screening part, characterized in that the front pole piece (1) is made up of the pole pieces of the individual tracks (15) and the working slots (11) with internal secretion plates (12) between which the side spacer plates (16) are glued, together with the shield plates (17), and this assembly is reinforced with internal ferrite reinforcement shield plates (18), with a portion of magnetic Jeh (2) is formed by gluing the ceramic plates (22), the shielding plates (23) and the ceramic bars (24), with their own magnetic yokes (2 & t) and wound coils (29), and the rear liner part inserted into the grooves in the ceramic bars (24). (3) is formed by gluing two slices of ferrite (19) and grooves and slices of ferrite (20), The grooves in the ferrite slots (19) with grooves form holes with the ferrite slice (20) for the outlets, while all three parts are joined in one unit by means of two outer connecting shield plates (7).