JPH0652006U - Magnetic head - Google Patents

Abstract

(57) [Abstract] [Purpose] Even with a multi-channel magnetic head, the number of manufacturing steps can be reduced and the cost is reduced. A multi-channel magnetic head having a plurality of magnetic cores 11 into which a plurality of bobbins 3 and 4 wound with coils 1 and 2 are respectively inserted, and between the bobbins 3 and 4. Are configured to be integrally connected via the connecting portion 5. [Effect] It is possible to insert a plurality of bobbins into the magnetic core having a multi-channel structure at the same time, and it is possible to reduce the number of manufacturing steps.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a multi-channel type magnetic head, and more particularly to a bobbin inserted into each of a plurality of magnetic cores.

[0002]

[Prior art]

 Conventionally, this type of magnetic head is held in a holder that is the main body in a state where a plurality of magnetic cores for multiple channels and a magnetic shield plate are magnetically and spatially separated. The magnetic shield plate has a predetermined shape in which upper and lower halves are butted. Only the lower half is shown in FIG. 5, and the upper half having the same structure as the lower half not shown is butted against the lower half shown in FIG. Will be formed.

The lower half body will be described with reference to FIG. 5. The magnetic core 11 held by the holder 22 shows the lower half body, and the winding core portion 13 is provided on the front side of the magnetic core 11. A central hole 16 of a bobbin 15 around which a coil 14 is wound is inserted in the winding core portion 13. The bobbin 15 is molded by resin, and one end of a terminal plate 17 is projected at the upper and lower ends thereof. Further, a winding core portion of a magnetic core forming an upper half body (not shown) is inserted into the center hole 16 of the bobbin 15.

Although the illustrated example is for two channels having two magnetic cores, there may be a case where three, four, or more magnetic cores are arranged in a row for multiple channels. A magnetic shield plate 12 is interposed between these magnetic cores. The magnetic shield plate 12 shows the lower half, and an insulating film of resin or the like is formed on the surface thereof to maintain insulation with the coil 14.

The coils 14 are individually wound around the plurality of bobbins 15, and the coils 14 are wound around the bobbins 15 by a winding machine 18 as shown in FIG. The winding machine 18 has a winding core 19 coupled to a rotation driving means (not shown). The winding core 19 is formed in a prismatic shape like the winding core portion 13, and the center holes 16 are inserted so that the end faces of the bobbins 15 abut each other. Then, after winding one end of the wire rod 21 drawn out from the pair of winding nozzles 20 around one of the terminal plates 17, the winding core 19 is rotated to wind the wire rod 21 around the winding body portion 15a of the bobbin 15. I am turning. After winding the wire rod 21 for a predetermined number of turns, the other end of the wire rod 21 is wound around the other terminal plate 17.

[0006]

[Problems to be solved by the device]

 The conventional magnetic head described above uses one bobbin 15 in the winding core portion 13 of the magnetic core 11 for one channel, and when the number of channels is increased to two or more, it depends on the number of channels. A number of bobbins 15 will be used. Thus, as the number of bobbins 15 increases, the coil winding time and the insertion work time into the winding core portion 13 increase proportionally. As a result, the number of steps for manufacturing the magnetic head increases, which inevitably leads to a problem of high cost. It was also attempted to wind the coils 14 on a plurality of bobbins 15 at the same time as shown in FIG. 6, but the pitch accuracy could not be obtained because the positions of adjacent bobbins vary. There was also a problem that the winding shape of the coil was uneven.

The present invention has been made in order to solve such a problem, and it is possible to reduce the number of manufacturing steps even for a multi-channel magnetic head and to reduce the cost. An object is to provide a magnetic head.

[0008]

[Means for Solving the Problems]

 The present invention relates to a multi-channel type magnetic head having a plurality of magnetic cores, each of which has a plurality of bobbins wound with a coil inserted therein. It is configured to be electrically connected.

[0009]

[Action]

 When multiple bobbins are integrally connected via the connecting part, it is possible to insert multiple integrally connected bobbins into the winding core part of the multi-channel magnetic core at the same time. Nevertheless, the manufacturing man-hour is shortened. Further, since a plurality of bobbins can be set in the winding machine with good pitch accuracy, even if the coils are wound on the plurality of bobbins at the same time, the winding shape is uniform and the winding time is shortened.

[0010]

【Example】

 An embodiment of a magnetic head according to the present invention will be described below with reference to the drawings. The same reference numerals as those in FIG. 5 indicate the same parts, and detailed description thereof will be omitted. In FIG. 1, two bobbins 3 and 4 around which the coils 1 and 2 are respectively wound are made of resin, and these bobbins 3 and 4 are integrally connected via a connecting portion 5. Has been. Further, central holes 6 and 7 are formed in the centers of the bobbins 3 and 4 so as to penetrate in the vertical direction. Further, one end of the terminal plate 17 is projected and provided at the upper and lower ends of the bobbins 3 and 4.

The bobbins 3 and 4 have a normal state before the coils 1 and 2 are wound, as shown in FIG. 2 (A). That is, the central holes 6 and 7 formed in the centers of the bobbins 3 and 4 are formed in a straight line, and the connecting portions 5 are connected to the end portions so that the mutual pitches are accurately maintained. Further, the connecting portion 5 is formed such that the joint portion with the end portion is bendable, and by bending the bobbins 3 and 4 in the direction of the arrow, the central holes 6 and 7 are formed as shown in FIG. 2B. Are parallel to each other. At this time, the dimension between the central holes 6 and 7 is preferably matched with the dimension between the winding core portions 13 of the magnetic core 11.

In the bobbins 3 and 4 configured as described above, the coils 1 and 2 are wound by the winding machine 18 shown in FIG. The winding machine 18 has the same configuration as that shown in FIG. 6, and after inserting the center holes 6 and 7 of the bobbins 3 and 4 into the prismatic winding core 19 coupled to the rotation driving means, respectively, The wire rod 21 led out from the wire nozzle 20 is wound around the bobbins 3 and 4 by rotating the winding core 19 in the same manner as described above. At this time, since the pitch between the bobbins 3 and 4 is accurately maintained at a predetermined dimension by the connecting portion 5, the wire rod 21 led out from the pair of winding nozzles 20 is attached to the bobbins 3 and 4. Even if the bobbins 3 and 4 are wound at the same time, the bobbins 3 and 4 have the same winding shape, and the deviation does not occur.

As described above, the bobbins 3 and 4 around which the coils 1 and 2 are wound are inserted into the winding core portion 13 of the magnetic core 11 at the same time in a bent state as shown in FIG. Then, as shown in FIG. 4, the winding core portion 9 of the upper magnetic core 8 is inserted into the center holes 6 and 7 of the bobbins 3 and 4, respectively. Further, the magnetic cores 11 and 8 are mounted on the shield case 10 in a state of abutting each other with a spacer (not shown) having a thickness of several microns interposed therebetween. Thereafter, the shield case 10 is filled with a predetermined resin to complete a multi-channel type magnetic head.

It should be noted that the above-described embodiment is merely an example, and the shape of the bobbin, the configuration of the connecting portion, and the like can be variously modified without departing from the scope of the present invention.

[0015]

[Effect of device]

 As is clear from the above description, since the magnetic head of the present invention integrally connects a plurality of bobbins through the connecting portion, the magnetic head of the multi-channel structure has a plurality of winding core portions. Since it is possible to insert the individual bobbins at the same time, it is possible to reduce the number of manufacturing steps. Further, since a plurality of bobbins can be set in the winding machine with good pitch accuracy, the coils can be wound around the plurality of bobbins at the same time, and there is an advantage that the winding time can be shortened.

[0016]

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a magnetic head according to the present invention.

FIG. 2 is a perspective view showing a configuration of the bobbin.

FIG. 3 is an explanatory view showing the winding state.

FIG. 4 is a sectional view of the magnetic head.

FIG. 5 is a perspective view showing a conventional magnetic head.

FIG. 6 is an explanatory diagram showing a conventional winding state.

[Explanation of symbols]

 1, 2 magnetic tape 3, 4 bobbin 5 connecting part 11 magnetic core 13 winding core part

Claims (1)

[Scope of utility model registration request] 1. A multi-channel type magnetic head having a plurality of magnetic cores, each of which is formed by inserting a plurality of bobbins around which a coil is wound. Heads that are physically connected.