DE1801915B2 - Core holder for a multi-track magnetic head - Google Patents

Description

a) each insert part (35, 35 ') with stop edges (44, 45; 44', 45 '), spring means (58, 59; 58', 59) arranged on one side on the receiving spaces (50, 51; 50 ', 51') ') and fixed stops (52, 53, 54, 55; 92, 93) opposite these and has a contactor (65, 65') with lateral flanges (66, 67) for a shielding insert between the receiving spaces,

b) and each housing part (10, 10 ') stops (22, 23) for the insert part (35, 35') and stop edges (74, 75) on the head mirror side for the core pieces (60, 71).

2. core holder according to claim 1, characterized = 5 by on both side edges of the insert part (35) arranged, resilient flanges (41, 43).

The invention relates to a core holder for one consisting of symmetrical head halves Multi-track magnetic head, each with a housing part and a non-magnetic spare part, in which the core pieces of the individual heads are resiliently held in the receiving spaces.

In the production of multi-track magnetic heads 4 <> It is known to use devices called core holders to hold the core halves together with the intermediate shielding and the additionally required Components, such as coils and windings as well as connection means, in a desired one on top of the other to hold coordinated position during assembly, this core holder in the finished magnetic head can be introduced. To place these items during assembly in the To keep precisely aligned position, it is known (DT-AS 11 48 266), a non-magnetic insert use, in which the core pieces of the individual egg heads are resiliently held in corresponding receiving spaces are. The required coordinated position of the core pieces is in this known arrangement achieved by a precision work, with the resilient design of the insert part the set position of the core pieces to each other secures. The insert is then put into a mold Serving housing used, which is equipped with appropriate guide grooves, in the associated Engage components of the insert. Carrying out this work requires great care and expertise.

In another known device (US-PS 33 36 663) for the coordinated Position of the individual components to be applied care avoided by being magnetically active Housing parts punched out of a blank for connection of core parts punched out of the sheet metal wall and be bent. With this arrangement, relatively large amounts of the highly permeable Metal required, which are not used magnetically, but take on pure housing functions. It is also to be feared that the magnetic structure of the metal due to the punching and bending processes is disturbed because the magnetic properties of metals with high permeability are very strong the crystal structure or its disturbances depend.

The invention is based on the object of a core holder for the core pieces in multi-track magnetic heads to create in which the insertion and alignment of the core pieces to each other no requires greater care and is carried out without the aid of additional precision gauges can be. The annoying potting of the core pieces, which was previously necessary, should also be avoided, through the previous (DL-PS 45 378) only the exact alignment of the core pieces to each other was guaranteed became.

This object underlying the invention is achieved

achieved in that

a) each insert part with stop edges, spring means arranged on one side at the receiving spaces as well as these opposing fixed stops is provided and between the receiving spaces has a slot with side flanges for a shielding insert,

b) and each housing part stops for the insert part and stop edges on the head mirror side for the core pieces.

The procedure is preferably such that arranged on both side edges of the insert part, resilient flanges are provided.

These measures make it easy to insert the core pieces into the insert and a Alignment of the core pieces possible by inserting the insert into the housing part, d. i.e., it happens an alignment of the core pieces on a common reference plane consisting of parts of the housing and of the stake. This allows work to be carried out in the insert part without potting the core pieces will.

Exemplary embodiments of the invention are given below explained on the basis of the drawings. The drawings show in

Fig. 1 is a schematic view of the housing part,

Fig. 2 is a perspective view of the insert,

F i g. 3 shows a plan view of the insert according to FIG. 2,

4 shows a plan view of the housing part according to FIG. 1 with the insert part according to FIG. 2 inserted and in the. core pieces used in both components,

F i g. 5 is a side view of the FIG. 4 shown core holder, partly in section,

F i g. 6 is a side view of a modified core holder;

7 shows a detail according to FIG. 6 in plan view,

Fig. 8 is a diagrammatic view of a modified one Execution of the insert part and

F i g. 9 is a reduced perspective view of a completed core holder.

18 Ol 915 3

In the figures, 10 denotes a housing part - a pair of circular openings 46 and 47 which net, that with side walls II and 12, a front a slightly larger diameter than that of the Nokwand 13 and a bottom wall 14 is equipped. ken 29 and 30 of the housing part 10 have. if

The side walls 11 and 12 each have a front insert part 35 inserted into the housing part 10, the rear part IS and 19 or 20 and 5, the cams 29 and 30 engage in the openings 21. The rear parts 19 and 21 are on the sides 46 and 47 and can be riveted here,
with respect to the front parts 18 and 20, the insert part 35 has receiving spaces 50 and sets that stops 22 and 23 are formed. 51, which extend from the front edge 36 to the rear. Each stop 22, 23 extends over the entire height of the parts 18 and 20 of the associated io and 39 at an oblique angle to the side walls 38. At the inner edges of the on-side wall and located approximately in the middle of the receiving spaces 50 and 51 are stops 52 and 53 of the longitudinal stretching of the same. or 54 and 55 and on the outer edges of the

The housing part 10 consists of a non-magnet chamber are made from the material of the insert table metallic material. In the front wall part 35 formed flanges 56 and 57 vorge-13 are openings 25 and 26 for core pieces 71 and 15 see the spring means 58 and 59, which after 60 provided. The openings 25 and 26 have in the inside over the receiving spaces 50 and 51 mainly a rectangular shape and can stand.

by the shearing of the material from the upper edge of the front wall 13, the position of the core piece 60 is formed downward in FIG. wherein the material is pressed outwards, 20 mode of operation and the interaction of the downwardly extending lips 27 and 28, beats 54 and 55 on the one hand, and the spring means 59 to form. In the bottom wall 14 a couple will show on the other hand. The size of the receptacle of cams 29 and 30 at a distance from the rear space 51 is formed somewhat larger than the inner edge of the bottom wall 14 to be inserted. In the core piece 60, ie the distance between the stops 54, the bottom wall 14 is furthermore an axially extending 25 _and 55 from the flange 57 is greater than the width of the kender slot 31 for receiving a magnetic core piece. Provided around the core piece 60 in the screen. Notches 32 and 33 are used to insert the receiving space, it is necessary that the inclusion of a terminal strip, not shown, for spring means 59 to bend outwards, so that the electrical connections. inserted core piece 60 the spring means the core

The number of openings 25 and 26 is directed 30 pieces against the stops 54 and 55 presses, after which the number of core pieces to be picked up. brought into the correct position by the core piece 60

The F i g. 2 and 3 show an embodiment of the one-will.

Sentence part 35 which is adapted to the housing part 10. I _n the insert part 35 remains a slot 65 The insert 35 is generally provided by a rectangular, the at both sides flanges 66 form and may have a suitable elasticity 35 and 67, which are preferably non-magnetic by bending of the work haves, works substance are created. The slot 65 interacts with the material to be punched out or pressed and consists of slot 31 in the housing part 10 for the purpose of receiving, preferably from a relatively thin beryllium, a magnetic shielding insert, to copper alloy. crosstalk or magnetic interaction

The front edge of the insert 35 is to be avoided with 36. 40 lines between the two tracks,
the rear edge with 37, a side wall with By installing the insert part 35 in the housing

38 and the other side wall is designated by 39. part 10 is a core holder marked 70

The side walls 38 and 39 are created in front parts 40. In the illustration according to FIG. 4 is in

and 42 and flanges 41 and 43 split. The the receiving space 51, the core piece 60 and in the

Flanges 41 and 43 are inserted opposite the front 45 receiving space 50, the core piece 71. the

Parts 40 and 42 laterally and towards the outside correct position of the core piece 60 is made by contact

sets and thus form stop edges 44 and 45, the core piece to the stop 55 and an edge

which determines against the stops 22 and 23 of the housing part 75 of the opening 26 on the one hand, where-

10 push through as soon as the insert 35 is in the rieh- at the core piece 60 on these two components

term location in the housing part 10 is located. The stop 5 <> the spring means 59 is pressed. In the one shown in FIG

Edges 44 and 45 point from the front edge 36 shown state, the stop 54 is from

such a distance that when the insert core piece 60 no longer touches. In the same way

part 35 inserted into the housing part 10 from the rear, the core piece 71 lies on the one assigned to it

the stop edges 44 and 45 of the insert stop 53 and an edge 74 of the opening 25

part 35, the stops 22 and 23 of the housing part 55 _and is against these two components by the

10 touch without the front edge 36 pressing the front spring means 58,
the wall 13 touches. So that a working together acting as a stop

The width of the insert 35 in the area of work between the stop 53 and the latter

Flanges measured across flanges 41 and 43 is associated with edge 74 on the one hand and the stop

a little larger than the distance between the ^6o 55 and the edge 75 assigned to it other-

Inner surfaces of the rear parts 19 and 21 on the other hand is possible, the stops 52 and 54 are made

Housing part 10. If the insert part 35 is aligned with the alignment of the stop 53 and the edge 74

housing part 10 is used, the flanges 41 or the stop 55 and the edge 75 are back-

and 43 offset by the rear parts 19 and 21 of the. This shift must be the maximum

Housing part 10 pressed inward. In this way ⁶ 5 permissible transverse deviation of the position of the core pieces

the flanges 41 and 43 serve as spring ^p rn, which correspond to the 60 and 71, with simultaneous consideration

Insert part 35 in the correct position within the visualization of the manufacturing tolerances of the openings

Bring housing part 10. The insert 35 has 25 and 26. sn HaR im nno ;; nct;, Yct <»" cn λ: ~ "-.

18 Ol

speaking surfaces of the core pieces 71 or 60 just touch the associated stop 52 or 54, respectively. The creaming spaces 50 and 51 are rearward by upstanding flanges 76 and 77 limited, which are important for the further assembly of the components and are therefore not further explained here Need to become. Normally, the core pieces 71 and 60 lie on these surfaces 76 and 77 not on.

After inserting the core pieces 60 and 71 in the * <> Receiving spaces 51 and 50, the core pieces in these receiving spaces are movable through the Spring means 59 and 58 held and from the front by moving in their longitudinal axis so in the correct Positioned so that they are held in the openings 25 and 26 in the desired position '5.

A plane laid by the stops 23 and 22, which is shown in FIG. 4, shown in phantom, serves as a reference plane for adjusting the core pieces from front to back. The vertical orientation * ° tung the core pieces can be done either by the abutment with the lips 27 and 28 or, if the lips are not used take place by engagement with the lower limiting edge of the openings 25 and 26th ² pp

After the core pieces 60 and 71 are set in the core holder 70 in the correct position, they will there by suitable means, e.g. B. Gluing, stored firmly. The front pole faces 72 and 73 are then together with the rear surfaces that come into contact with the associated core pieces should, lapped, so that a smooth even plane is formed, so that through the pole faces 72 and 73 and the associated pole faces of the adjacent core pieces create the necessary gap will. At the rear parts 19 and 21 of the side walls 11 and 12 can go up protruding elevations 15 and 16 and on the front wall 13 a corresponding elevation 17 can be provided, which is used as a reference surface during lapping is used. To the pressure possibly exerted thereby on the front wall 13 dominate, the connection points between the side walls 11 and 12 and the front wall 13 be provided with reinforcements 78 and 79.

When the core holder 70 is finished, it is assembled with an identically designed core holder, so that the component 80 shown in Fig. 9 is created. The component 80 can be used as Ready-to-install magnetic head module can be used 5 "or is used for installation in a shielding can with additional adjustment devices.

In Fig. 4 are denoted by 82 and 83 projections of the lips 27 and 28, which over the side edges of the core pieces 60 and 71 are sufficient. These overhangs 82 and 83 can be used as reference edges during installation of the component 80 in other housing parts, such as. B. a shielding cup, serve.

A modified embodiment is shown in FIGS. The front wall 13 'and the rope walls 11 'and 12' are punched from a flat material and consist of a Part with the bottom wall 14 '. On the front wall 13 'two tabs 90 and 91 are provided, which extend outward. To form the housing part 10 ', the side walls 11' and 12 'are in one Angle of 90 'to the bottom wall 14' bent up and the front wall 13 'at an angle of bent less than 90 upwards. The flaps 90 and 91 are angled backwards at 90 'to the front wall 13' bent and then rigid with the side walls 11 'and 12' by any Funds connected. In this way, the front wall 13 'is reinforced for the subsequent lapping work. As shown in FIG. 6 is indicated, the insert 35 can be used in the housing part 10 '.

The in Fig. 8 shown insert part 35 'can be pressed from a plastic plate. Backward Side edges 41 'and 43' project over the front side edges 40 'and 42' and form thereon Way stop edges 44 'and 45'. The stop edges 44 ′ and 45 ′ lie against the stops 22 and 23 of the housing part 10 when installing the insert / part 35 'at. For receiving the provided on the housing part 10 cams 29 and 30 on the lower Any recesses required on the side of the insert part 35 'are not shown in the illustration recognizable. At the same time, the side edges 41 and 43 'lie on the rear parts 19 and 20 of the Side walls 11 and 12 of the housing part 10. The insert part 35 ′ can be glued to the housing part 10 will. The core pieces are inserted in the receiving spaces 50 'and 51. The middle of the feather 58 'and 59' are formed by molded elastic arms that Geger the core pieces used the opposite stops 92 and 93 press the rear part of the stop 92 is with the Reference number 53 'and the front part of the stop 92 with the reference number 52' while the rear part of the stop 93 with the reference numeral 55 'and the front part of the An Impact 93 is provided with the reference numeral 54 '. Also in the case of the one shown in FIG. 8 insert part 35 shown the core pieces are when the insert 35 'is inserted into the associated housing part 10 do not touch the front portions 52 'and 54' of the stops 92 and 93, similar to that in FIG Connection with the stops 52 and 54 de housing part 35 has been explained.

In the insert part 35 'there is also a slot 65' for receiving a magnetic shielding insert seen.

For this purpose 2 sheets of drawings

Claims (1)

18 Ol S15 claims: 1. Core holder for a multi-track magnetic head consisting of symmetrical head halves each with a housing part and a non-magnetic insert part in which the core pieces the individual heads are resiliently held in the receiving rooms, characterized in that that ίο