JPH01318220A - Manufacture of toroidal coil - Google Patents

Abstract

PURPOSE:To eliminate the need for winding operation by embedding a lead terminal for winding whose one part has been cut off in a resin, connecting it in series on a printed-circuit board where a short-circuiting pattern of the lead terminal for winding has been formed, and forming a coil with a plurality of number of turns. CONSTITUTION:A toroidal core 1 is inserted into a fixing base 2, a printed- circuit board 7 where a short-circuiting pattern is formed so that there is one toroidal winding around the part where the upper part of a winding lead terminal 3 is cut off is mounted to the winding lead terminal 3, the lead terminal and the terminal of the printed-circuit board 7 are soldered, and a coil obtained by performing a plurality of toroidal windings is formed. It eliminates the need for performing troublesome winding, allows a toroidal coil to be obtained easily, and improves operation drastically.

Description

DETAILED DESCRIPTION OF THE INVENTION [Overview of the Field] The present invention relates to a winding structure of a toroidal coil forming a transformer/inductor used in electronic equipment.

[Contents and problems of conventional technology]

Conventionally, this type of toroidal coil had the disadvantage that it was necessary to wind the wire without cutting the wire in the middle, and the smaller the inner diameter of the toroidal core, the more difficult it was to automatically wind the wire, making it necessary to rely on manual winding. there were.

[Purpose of the invention]

The present invention eliminates the manual winding work and makes it possible to easily obtain a toroidal coil.This invention greatly reduces the working time for manufacturing a toroidal coil, and also makes it possible to easily automate the process. The purpose is to provide a structure for

[Structure of the invention]

In the present invention, a part of the winding lead wire corresponding to one winding wire is cut so that a toroidal core can be inserted, and a plurality of winding lead terminals are lined up and buried in resin, and then embedded in a board. Using a printed circuit board with a short-circuit pattern formed by cutting off a part of the installed winding lead terminals in series, the lead terminals are connected in series and soldered afterwards to create a coil with multiple turns. This is a method for manufacturing a toroidal coil, characterized in that a toroidal coil is formed.

[Explanation based on examples]

FIG. 1 shows a first embodiment, and FIG. 3 is a sectional view thereof. The winding lead terminal 3 corresponds to one toroidal winding, and the upper part of the winding lead terminal 3 is cut off so that the toroidal core 1 can be inserted therein. A base 2 for fixing a winding lead terminal is formed by arranging the toroidal windings in a plurality of turns and fixing them with a resin mold. The toroidal core 1 is inserted into the fixing base 2, and the printed circuit board 7 on which a short circuit pattern is formed so that the upper part of the winding lead terminal is cut off is connected to the winding lead terminal. 3, and by soldering the lead terminals and the terminals of the printed circuit board, a coil similar to that obtained by performing multiple toroidal windings is formed. .

FIG. 2 shows a second embodiment, and FIG. 4 is a sectional view thereof. The second embodiment has a toroidal coil covered with resin, and has the same structure as the first embodiment.

FIG. 5 shows a third embodiment, in which instead of molding the winding lead terminals with resin, a guide base 6 with holes provided in advance so that the winding lead terminals can be arranged in an orderly manner is used.
A winding lead wire is passed through the hole to form a winding lead terminal similar to the first and second embodiments. Further, the printed circuit board with the short circuit pattern connecting the winding lead terminals in series is the same as in the first and second embodiments.

The method for manufacturing the toroidal coil configured as described above is as follows:
There is no need to worry about the hassle of winding wires as in conventional manual winding methods, and a toroidal coil can be easily obtained, resulting in a significant improvement in workmanship.

[Brief explanation of the drawing]

FIG. 1 is a perspective view in which winding lead terminals are arranged at regular intervals, a toroidal core is inserted into a resin-molded base, and a printed circuit board with a short circuit pattern is mounted. FIG. 2 is a perspective view of the toroidal coil shown in FIG. 1, with the exterior covered with resin. FIG. 3 is a sectional view of the toroidal coil shown in FIG. 1. FIG. 4 is a sectional view of the toroidal coil shown in FIG. 2. FIG. 5 is a cross-sectional view when a guide base with holes is used and resin molding is not performed. 1... Toroidal core. 2... Fixed base for winding lead terminals. 3... Lead terminal for winding. 4...Solder. 5...Exterior. 6... Guide base. 7...Printed circuit board. Patent applicant: Tohoku Metal Industry Co., Ltd. Figure 1

Claims (1)

[Claims] A part of the winding lead wire corresponding to one turn of the winding wire is cut to allow insertion of the toroidal core, and a plurality of winding lead terminals are lined up and buried in resin, and then attached to the board. A toroidal core is attached to a base for fixing wire lead terminals, and the lead terminals are connected in series by cutting a part of the first winding, and the lead terminals are connected in series using a printed circuit board with a continuous short circuit pattern. A method for manufacturing a toroidal coil, characterized in that the coil is fertilized to form a coil having a plurality of turns.