JPH0248967Y2 - - Google Patents

Description

[Detailed description of the invention] The invention consists of two core assemblies in which two C-shaped and inverted C-shaped cores each having a wire wound thereon are butted against each other by providing a spacer, that is, a magnetic gap, on the tip surfaces of the cores. In the Brie, U-shaped flanges are inserted into both ends of the U from opposite directions to form a frame for determining both ends of the winding, and the wire is wound between these frames to prevent the end faces of the winding from deforming. It is an object of the present invention to provide a ring-shaped magnetic head.

The magnetic head used in magnetic recording devices is the first
As shown in the figure, a winding 2 is applied to the central straight part of a C-shaped core 1 and an inverted C-shaped core 1, and a magnetic gap 4 is sandwiched between the tips of each of two sets of cores that are glued to a holder 3, and the core assembly is assembled. The holder is assembled by passing screws 5 through both holders 3 and tightening them, and then housed in a magnetically shielded case and injected with resin and fixed.

Conventionally, in the case of winding the core of such a magnetic head, since the core is small and there is no space for winding after fitting the bobbin, the core is usually wrapped with insulating tape and an insulating tape of, for example, 0.12 mm in diameter is wrapped around the core. 250 times of copper wire or 1500 times of insulated copper wire with a diameter of 0.03mm
The winding involves winding extremely thin coated copper wire, but since there is nothing to support both sides of the winding, it is difficult to wind it in an organized manner, and the work efficiency is poor, with the sides of the winding collapsing, resulting in poor reliability. It had the disadvantage of being lacking in sexuality.

In order to eliminate such drawbacks of the conventional method, the present invention provides a magnetic head in which a pair of magnetic cores each having abutting surfaces at both ends and each having a coil wound thereon are formed by aligning the abutting surfaces. Two pairs of flanges having engaging portions that engage with each other on the same side with the pair of magnetic cores butted against each other are provided at positions sandwiching the coil at both ends of each of The magnetic head is characterized in that the engaging portion of the collar on the same side has a convex step portion and a concave step portion formed in opposite positions to each other. The flange is preferably made of synthetic resin or the like and has some elasticity.

As shown in FIG. 2, in the head of the present invention, one end 11 of the straight part 13 of the C-shaped core 1 has a thin end surface with a beveled end at the base, and the other end 12 extends from the straight part 13. constitutes a core 1 which has a shape bent almost at right angles and has a width W depending on the width of the magnetic track, and as shown in FIG. 7 and 7' are sandwiched from opposite directions, and the two cores with the wire wound therebetween are butted against each other. As shown in FIG. 3, this core has U-shaped flanges 7 and 7' at both ends of the straight portion 13 of the core 1, the bottom width B of which is lower than the end surfaces of the end portions 11 and 12.
are fitted from opposite directions, and after wrapping the insulating tape 6 around the straight part 13 between both the flange 7 and 7', the flange 7, 7' and the insulating tape 6 are fixed with adhesive, and the flange 7 is A winding is applied between and 7'. Since the end faces of the winding are defined by the flanges 7 and 7', the winding does not collapse and the work is easy. In addition, since the present invention uses a U-shaped tsuba, even if the width W of the core 1 is different, it is only necessary to prepare one type of tsuba whose length is the maximum value of the width W. There is no need to prepare a wide variety of tsuba.

FIG. 4 shows another embodiment of the present invention, in which a U-shaped tsuba 8 has a length on one arm 9 from the bottom of the tsuba 8 so that the relationship between the bottom width B and the core width W is B+1/2W. Now, there is a thin connecting convex part 81 that is approximately half the thickness of the arm 9.
, and from this convex step 81 to the free end surface of the tip of the arm 9 is a connecting concave step 8 that fits into the convex step 81 .
2 will be provided. Winding is performed by inserting such flanges 8 at both ends of the straight portion 13 of the C-shaped core 1, and by inserting the U-shaped free end surfaces from opposite directions to form the end surfaces of the winding. The two cores 1 and 1' thus produced are fixed with a butt holder with a spacer interposed between the ends 11 and 12 to form a magnetic head. At this time, the convex stepped portion 81 of the flange of the core 1
Since the recesses of the other cores 1' are fitted into each other, the cores 1 and 1' are correctly positioned when assembled, and do not move easily.

As explained above, the magnetic head in which the tsuba of the present invention is fitted into the core can easily wind thin wire without damaging the end face of the winding wire of the core, and since four of the same tsuba are used, it is possible to easily wind a thin wire. reduce the
A highly reliable magnetic head with good work efficiency and no movement of the winding position can be obtained.

[Brief explanation of the drawing]

Figure 1 is a side view showing the structure of the magnetic head, Figure 2 is a side view showing the structure of the magnetic head.
The figure is a perspective view of the core of a conventional magnetic head, Figure 3 is a perspective view of a core assembly provided with a flange of the present invention, and Figure 4 is a perspective view of a core assembly provided with a flange of another embodiment of the present invention.
FIG. 3 is a perspective view of a set of core assemblies. In the figure, 1, 1'... core, 2... winding, 3...
Holder, 4... Magnetic gap, 5... Screw, 6... Insulating tape, 7, 7', 8... Tsuba, 9... Arm of tsuba, 11, 1
2... End portion of the core, 13... Straight portion of the core, 81... Convex stepped portion, 82... Concave stepped portion.

Claims (1)

[Claims for Utility Model Registration] In a magnetic head formed by a pair of magnetic cores each having abutting surfaces at both ends and each having a coil wound thereon, the abutting surfaces of each of the magnetic cores are brought together. Two pairs of collars having engaging portions that engage with each other when the pair of magnetic cores are abutted are provided at positions sandwiching the coil at both ends, and the corresponding same sides of the pair of magnetic cores are provided. A magnetic head characterized in that the engaging portion of the collar has a convex step portion and a concave step portion formed in opposite positions to each other.