JP2536390Y2 - Magnetic head - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial application field> The present invention relates to a magnetic head used in a magnetic recording / reproducing apparatus in which a holder for holding a magnetic core and a shield case are electrically and mechanically joined. About.

<Prior Art> An example of a magnetic head used in a conventional magnetic recording / reproducing apparatus is a magnetic head 1 having a C-shaped cross section in which a winding 10 is wound around a straight line as shown in FIG. To be held. Similarly, a magnetic core 1 'having a C-shaped cross section in which a winding 10' is wound around a linear portion is held by a holder 2 '. Where the holder
Reference numerals 2, 2 'are made of a non-magnetic metal material (conductive material) such as aluminum, zinc, stainless steel, phosphor bronze, etc., and are formed by bending or die casting. The two magnetic cores 1 and 1 'are provided with a nonmagnetic material foil 7 on one end surface to form a magnetic gap, and are fixed by tightening a tightening screw 8 between the two holders 2 and 2'. The element 11 is formed. As shown in FIG. 3, the magnetic head element 11 is housed in the shield case 3, and a conductive adhesive 9 is partially applied between the holder 2 and the shield case 3.
Since the holders 2 and 2 'are electrically connected by the tightening screws 8, the conductive adhesive 9 is not applied between the holder 2' and the shield case 3 here.

Further, the inside of the shield case 3 is filled with resin,
A magnetic head surface is formed by polishing and finishing a magnetic gap surface which is slid in contact with a magnetic medium.

<Problems to be Solved by the Invention> However, in the conventional magnetic head, since the shield case 3 and the holder 2 are adhered with the conductive adhesive 9, dirt on the adhesion surface, oil, etc. For this reason, there is a disadvantage that a positional shift occurs due to peeling after bonding or the like, and a mechanical connection is weak due to a crack or the like of the conductive adhesive 9 and the electrical connection is lost.

<Means for solving the problems>
Two C-shaped magnetic cores 1, 1 'wound with 10, 10'
Non-magnetic material foil 7 is sandwiched at the tip of
One end is soldered to the shield case and the other end is connected to the shield case between the shield case 3 in which the magnetic head element 11 sandwiched and held therebetween and at least one of the holders 2, 2 'are housed. , 2 'is a magnetic head which is electrically and mechanically connected by a copper foil 4 screwed to one of the two.

<Operation> By screwing the magnetic cores 1 and 1 'to the holders 2 and 2', the holders 2 and 2 'are electrically connected. One end of the copper foil 4 is screwed to the holder 2, and the other end is soldered to the shield case 3 to ensure mechanical and electrical connection between the holder 2 and the shield case 3, The static electricity generated in the magnetic gap due to the sliding friction is released through the shield case to reduce noise to input / output signals.

<Embodiment> Fig. 1 shows an embodiment of the magnetic head of the present invention.

As shown in the drawing, a non-magnetic material foil 7 is attached to the tip of a magnetic core 1, 1 'having a C-shaped cross section in which windings 10, 10' are wound on straight portions.
The magnetic head element 11 is formed by being sandwiched by holders 2 and 2 ′ in which at least one of them is provided with a screw hole in advance. The holders 2, 2 'are made of a non-magnetic metal material and have conductivity as in the prior art, and are electrically connected to each other by, for example, a tightening screw for fixing the magnetic cores 1, 1'.

After the magnetic head element 11 is housed in the shield case 3, one end of the copper foil 4 is fixed to a screw hole formed in the holder 2 in advance with a screw 5, and the other end is soldered to the shield case 3. Fixed and connected mechanically and electrically.
Thereafter, a resin is filled in the shield case 3 and the magnetic gap surface is polished into an arc shape to obtain a magnetic head.

<Effects of the Invention> As described above, according to the present invention, the space between the shield case 3 and the holder 2 is securely fixed by the copper foil 4 using the solder 6 and the screws 5. Because they are mechanically coupled and electrically joined, static electricity generated by friction with the magnetic medium is dissipated through ground. In addition, even if a displacement occurs between the shield case 3 and the holder 2, the displacement is absorbed by the copper foil 4.
The connection between the shield case and the holder can be maintained. Therefore, the occurrence of noise between the input and output signals of the magnetic head is reduced.

[Brief description of the drawings]

FIG. 1 is an external perspective view of the magnetic head according to the embodiment of the present invention as viewed from the back, FIG. 2 is an external perspective view of an example of a magnetic head element conventionally used generally and viewed from the magnetic gap surface, and FIG. FIG. 1 is an external perspective view of an example of a conventional magnetic head viewed from the back. In addition, 1,1 ': magnetic core, 2, 2': holder, 3: shield case,
4: Copper foil, 5: Screw, 6: Solder, 7: Non-magnetic material foil, 8: Tightening screw,
9: conductive adhesive, 10, 10 ': winding, 11: magnetic head element.

Claims (1)

(57) [Scope of request for utility model registration] 1. A non-magnetic material foil 7 is sandwiched between two ends of two C-shaped magnetic cores 1 and 1 'having windings 10 and 10' wound on a straight portion. One end is soldered to the shield case between the shield case 3 in which the magnetic head element 11 held and abutted together with 2 ′ is held and at least one of the holders 2 and 2 ′, and the other end is A magnetic head which is electrically and mechanically connected by a copper foil 4 screwed to one of the holders 2 and 2 '.