JPH0541122U - Coil element - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] Toroidal coil using an annular core made of a soft magnetic material with a relatively small number of turns can be assembled by simple work without winding the work. An object is to provide a coil element. A catalyst-containing special resin 16 having a plating adhesion property is formed on the outer surface by exposing a plurality of strip-shaped contact connection portions on the divided joint surface, and the catalyst-containing resin-exposed surface is strip-shaped. An annular core 3 made of a soft magnetic material is housed in a split core insulating case made up of an outer cylinder 5 and an inner cylinder 6 having an annular space inside by plating 13 to form a winding by strip plating.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a coil element structure using an annular core made of a soft magnetic material having high relative magnetic permeability characteristics.

[0002]

[Prior Art]

 Conventionally, a coil element using an annular core has been constructed by housing the annular core in two double-ended cylinders with a bottom, or in a split-type core insulation case consisting of the body of a double-ended cylinder and an annular lid. The wire was wound by hand or by a machine over an insulating case made of resin material or resin material containing ceramics.

[0003]

[Problems to be solved by the device]

 The work of manually winding the electric wire around the annular core requires a lot of time, has a flutter in the finish, and has the problems of poor quality and high manufacturing cost. When using an automatic winding machine, the machine is expensive, labor and operation are complicated and complicated, it is difficult to improve the winding work efficiency, and the manufacturing cost is high even with high quality. There was a problem.

An object of the present invention is to provide a coil element structure which can be assembled by a simple operation without winding an electric wire in a coil element having a relatively small number of winding turns.

[0005]

[Means for Solving the Problems]

 The split core insulation case for the annular core (hereinafter referred to as the insulation case) is formed by using an ordinary insulation resin that does not adhere to the plating and a special resin containing a catalyst that adheres to the plating The catalyst-containing special resin is exposed in a plurality of strips having contact portions at both ends, and the exposed surface of the catalyst-containing special resin formed in the strip is plated.

That is, according to the present invention, a catalyst-containing special resin having an adhesion property of plating on the outer surface is formed by exposing a plurality of strips by providing abutting connection portions on the divided joint surfaces and molding the catalyst-containing special resin. The split core insulation case, which has an annular space inside by plating the exposed surface of the special resin, houses the annular core made of soft magnetic material and forms a winding by strip plating. Is a coil element.

[0007]

[Action]

 The stripped core insulation case, which is band-plated, houses the annular core and insulates the annular core from the outside. The strip-shaped platings make contact with each other at the abutting connection portions to form the windings on the outer surface of the insulating case.

[0008]

【Example】

 Examples will be described in detail with reference to the drawings. 1 to 5 are views of a coil device according to a first embodiment of the present invention. As shown in the exploded perspective view of FIG. 1, the split core insulating case includes a body 1 of a double cylinder with a bottom and a lid 2 of an annular plate. The body 1 has an annular space 4 for accommodating an annular core 3 having high relative magnetic permeability characteristics, which is formed by an outer cylinder 5, an inner cylinder 6 and a bottom plate therebetween. Steps 7 and 8 are formed on the inner peripheral edge of the outer cylinder 5 and the outer peripheral edge of the inner cylinder 6, respectively. A projecting piece 9 for positioning the lid 2 is provided at one location on the step of the outer cylinder 5. The outer diameter of the lid 2 is the same as the outer diameter of the outer cylinder 5, the inner diameter is the same as the inner diameter of the inner cylinder 6, and steps 10 and 11 are formed on the outer and inner peripheral edges of the lower surface, respectively. is there. On the side wall of the stepped portion 10, as shown in FIG. 2 showing only the lid 2 with its upper and lower surfaces reversed, a concave portion 12 for positioning corresponding to the projecting piece 9 is formed. The depth of the steps 10, 11 is slightly smaller than the depth of the steps 7, 8 of the body 1. Since the body 1 and the lid 2 are configured as described above, the step portions 10 and 11 are brought into contact with the upper end surfaces of the outer cylinder 5 and the inner cylinder 6 shown in FIG. Can be combined. On the outer surfaces of the body 1 and the lid 2, a plurality of strip-shaped platings 13 are provided at intervals in the circumferential direction. The strip-shaped plating 13 has a starting end 14 and a terminating end 15 near the projecting piece 9, and has a shape that is connected in a spiral shape when the body and the lid are joined. The strip-shaped plating 13 of the body 1 extends parallel to the axial direction on the outer surfaces of the outer cylinder 5 and the inner cylinder 6, and the bottom surface of the outer cylinder 5 and the inner cylinder 6 are connected to each other in a radial direction so as to connect the strip-shaped plating 13 adjacent to each other. The two end portions extend to the end faces of the outer cylinder 5 and the inner cylinder 6 and serve as a contact connection portion. The strip-shaped plating 13 of the lid 2 extends in the radial direction, and both ends thereof extend to the step portions 10 and 11 via the outer and inner peripheral surfaces, respectively, as shown in FIG. There is. When the annular core 3 is put into the body 1 and the lid 2 is assembled, the strip-shaped plating 13 of the body 1 and the lid 2 come into contact with each other at abutting contact portions of both ends, and as shown in FIG. With this, a winding with about 12 turns is completed, and a normal mode choke coil can be made. The strip-shaped plating 13 is shown in the vertical sectional view of FIG. 3 in FIG. 4. As shown in FIG. 5, which is an enlarged view of the main part A of the sectional view, the strip-shaped plating 13 is exposed and formed on the required surfaces of the body 1 and the lid 2. A special resin such as a catalyst-containing polyphenylene sulfide (liquid crystal polymer) or liquid crystal polymer (Liquid Crystalline Polyester) is used, and the exposed surface of the special resin 16 is formed by a non-electrolytic plating of copper by a usual method. The special resin 16 can be molded by secondary molding so as to fill the required groove portion of the primary molded body of an ordinary insulating resin material. Further, the body 1 and the lid 2 can be made by applying another procedure for making a molded body in which two kinds of resins are combined.

6 and 7 are an exploded perspective view and an external view showing another embodiment of the present invention. The body 1 of the split-piece core insulating case is provided with a central partition plate 17 and a lower partition stand 18, and the lid 2 is provided with an upper partition stand 19. On the outer surfaces of the body 1 and the lid 2, a plurality of strip-shaped platings 13 are provided symmetrically with respect to the central partition plate 17, the lower partition table 18 and the upper partition table 19 in the circumferential direction. The body 1 has two starting ends 14 and two ending ends (not shown). The strip-shaped plating 13 of the lid 2 is arranged so as to face the upper partition 19 twice. Therefore, when the ring-shaped core 3 is put in the body 1, the lid 2 is fitted in the vertical groove of the upper partition 19 and the groove on the protruding portion of the central partition plate 17, and the body 2 is combined, the strip-shaped plating 13 is formed at both ends. It is possible to form two windings having 7 turns by making contact with each other at the abutting contact portion. By assembling in this way, a toroidal common mode choke coil is completed.

[0010]

[Effect of the device]

 The coil element according to the present invention has a structure that can be efficiently assembled by applying an automated device by a simple operation because there is no wire winding work, and thus a high-quality and inexpensive coil element can be provided.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of a coil element according to the present invention.

FIG. 2 is an external perspective view showing the lid in FIG. 1 turned upside down.

3 is an external perspective view showing the assembled state of FIG. 1. FIG.

FIG. 4 is a vertical sectional front view of FIG.

5 is an enlarged cross-sectional view showing a main part A in FIG.

FIG. 6 is an exploded perspective view showing another embodiment of the coil element according to the present invention.

7 is an external view showing the assembled state of FIG. 6 in a different direction.

[Explanation of symbols]

 1 Body 2 Lid 3 Annular Core 4 Annular Space 5 Outer Cylinder 6 Inner Cylinder 7,8,10,11 Step 9 Protruding Piece 12 Recess 13 Recessed Plating 14 Starting End 15 End 16 Special Resin 17 Center Partition 18 Lower Partition 19 Upper Partition 20 Abutment connection

Claims (1)

[Scope of utility model registration request] 1. A catalyst-containing special resin having an adhesion property of plating on the outer surface is formed by exposing a plurality of strips with abutting connection portions on the divided joint surfaces, and molding the catalyst-containing special resin. A coil element, wherein an annular core made of a soft magnetic material is housed in a split type core insulating case having an annular space provided inside by plating on an exposed surface to form a winding by strip plating.