SU881834A1

SU881834A1 - Magnetic head

Info

Publication number: SU881834A1
Application number: SU802885109A
Authority: SU
Inventors: Юрий Сергеевич Епишкин; Владимир Ильич Труфанов; Ауксутис Аницетович Якштас; Римвидас Пятро Ясинавичюс; Валерий Петрович Фролов; Владимир Викторович Раков
Original assignee: Предприятие П/Я А-3593
Priority date: 1980-02-19
Filing date: 1980-02-19
Publication date: 1981-11-15

Description

(54) МАГНИТНАЯ ГОЛОВКА(54) MAGNETIC HEAD

II

Изобретение относитс к пр борострое ПИЮ, в частности к магнитным головкам, выполненным дл использовани в аппаратах магнитной записи специального и бытового назначени .The invention relates to a boring instrument of the ISU, in particular to magnetic heads, made for use in magnetic recording apparatus of special and household purposes.

Известна магнитна головка, имеюща в рабочем зазоре многослойную прокладку, состо щую из чередующихс магнитных и немагнитных слоев, нанесенных путем электроосаждени магнитом гкого материала на плоскости пластины из немагнитного проката 1.A known magnetic head is provided with a multilayer gasket in the working gap consisting of alternating magnetic and non-magnetic layers applied by electroplating a soft material on the plane of the non-magnetic rolled metal plate 1.

Така фокладка работает достаточно хорошо в случае, когда ее твердость соизмерима с твердостью полюсных наконечников . Но повтор емость ее выполнени по габаритам и по электромагнитным параметрам недостаточно высока , что приводит к необходимости осуществлени в каждом аппарате магнитной записи длительной и сложной регулировки в тракте, где установлена така головка.This blocking works well enough in the case when its hardness is comparable with the hardness of pole pieces. But the reproducibility of its implementation in terms of dimensions and electromagnetic parameters is not high enough, which leads to the need for making in each device a magnetic recording of a long and complex adjustment in the path where such a head is installed.

Наиболее близкой к предлагаемой вл етс магнитна головка, содержаща магнитом гкие ферритовые полусердечники с расположенной на них обмоткой и установленную в рабочем зазоре между полюснымиClosest to the present invention is a magnetic head containing magnetically soft ferrite half-cores with a winding located on them and installed in the working gap between the pole

наконечниками полусердечников комбинированную прокладку, состо щую из магнитом гкого и немагнитного слоев 2.the tips of the half-cores are a combined gasket consisting of a magnet of soft and non-magnetic layers 2.

Однако така головка не обладает достаточно высокой стабильностью параметров как в процессе ее изготовлени , так и 5 в процессе эксплуатации, что св зано с разной твердостью прокладки и полюсных наконечников: при обработке новой головки материал прокладки размызываетс по рабочей поверхности всей головки ввиду его механической м гкости, аналогичное происходит и при эксплуатации, где в качестве инструмента размызывающего материал прокладки выступает магнитный носитель, рабоча поверхность которого об зательно в той или иной степени обладает наждач 5 ностью. Кроме того, известна головка не обладает достаточно высоким качеством стирани ранее записанной сигналограммы.However, such a head does not have a sufficiently high stability of parameters both during its manufacture and 5 during operation, which is associated with different hardness of the gasket and pole pieces: when processing a new head, the gasket material is blurred over the working surface of the entire head due to its mechanical softness. the same happens during operation, where magnetic media acts as a tool for the material to be washed out, the working surface of which is necessarily in one degree or another 5 and has nazhdach NOSTA. In addition, the well-known head does not have a sufficiently high quality of erasing a previously recorded waveform.

Целью изобретени вл етс повыщение стабильности магнитной головки в процессе ее изготовлени и эксуплатации, а также 20 улучшение качества стирани ранее записанной информации - сигналограммы.The aim of the invention is to increase the stability of the magnetic head in the process of its manufacture and expulsion, as well as to improve the quality of erasing previously recorded information — the waveforms.

Claims

This goal is achieved by the fact that in a magnetic head containing a magnetically soft rith () half-cores with a winding located on them and installed in the working gap between the pole tips and half-cores a combined gasket consisting of a magnetically soft and non-magnetic layers made of tensor stable amorphous material with a Vickers hardness of 520–900 units and with a maximum magnetic permeability exceeding the figure of the specified minimum hardness by at least two normal . The drawing shows the construction of the proposed magnetic head. On the half-cores 1 there is an ob-, skein 2, and a combined gasket consisting of magnetic-passive, i.e. non-magnetic layers 3, and magnetoactive, i.e. magnet of the soft layer 4, is installed in the working gap 5 of the head between its pole tips 6 and 7. The pole tips can be either inserted or natural extension of the half-cores 1, as shown in the drawing. The head works as follows. Due to the fact that the size of the working gap is determined by a relatively thick gasket, a head of this kind can be used primarily to erase the previously recorded waveform, for which the current of the corresponding frequency in the erase mode is applied to pins 8 and 9 of the winding 2. The use of a soft layer of amorphous material as a magnet does not alter the electrical parameters of the head and at the same time allows a significant improvement in the technological process. And this is all the more important because, as practice has shown in the manufacture of such a head, the mechanical treatment of an amorphous material does not impair its magnetic properties. The known materials from impacts (for example, when cutting a strip from a sheet of whole material) partially lose their magnetic properties. Thus, the design of the strip of amorphous material not only facilitates the technological process, but also reduces the consumption of wire for the winding, since it eliminates the need to create an increased voltage on it to form the required magnetic field in the working gap in the presence of a pad that has lost some of its magnetic properties when it is cut from a whole sheet, and this saves energy. Claims of the Invention Magnetic head containing magnetically soft ferrite semi-hearts with a winding located on them and installed in the working gap between the pole tips of the half-cores a combined gasket consisting of a magnet of a soft and non-magnetic layers, so as to increase the stability of its parameters in the process of manufacture and operation, as well as improving the quality of erasing the previously recorded waveforms, magnetically soft layers of the gasket are made of a tenacity-stable amorphous material ala with a hardness of 520-900 Vickers units and with a maximum magnetic permeability, superior to that of said minimum hardness number not less than two orders of magnitude. Sources of information taken into account during the examination 1. USSR author's certificate number 183424, cl. G 1 B 5/27, 1964.

2. USSR author's certificate number 664193, cl. G 11 V 5/12, 1977 (prototype).