JPH0727117U - Inductor - Google Patents

Abstract

(57) [Summary] [Purpose] To facilitate the work of winding a conductor around an inductor and reduce the work time. [Structure] The flat cable 1 is arranged within the inner diameter of the toroidal core 3, the printed circuit board 2 is arranged outside the toroidal core 3, and the conductor exposed portions 7 and 8 of the flat cable 1 and the conductor pattern 12 of the printed circuit board 2 are connected to each other to form an electrical connection. To be a single conductor, and terminal blocks are formed at both ends of the printed circuit board 2. [Effect] Since the toroidal core is wound by the plurality of conductors of the flat cable and the printed circuit board, the working time can be shortened. The reliability of the terminal portion is improved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure including a winding method of a toroidal core that constitutes an inductor, and particularly to an inductor configured without winding an electric wire.

[0002]

[Prior art]

 In the conventional inductor, as shown in FIG. 3, the winding to the toroidal core 3 uses the electric wire 13 in which a copper wire is coated with an insulating material and is wound one turn at a time. In the case where the length of the wire is long, it is difficult to wind the wire through the inside diameter of the toroidal core when the wire is wound multiple times. In addition, multiple wires crossed inside the inner diameter of the toroidal core, and kinks (small loops formed by twisting) occurred.

[0003]

[Problems to be solved by the device]

 In the conventional inductor, the work of passing the wire through the inside of the toroidal core one turn at a time was repeated, and it took a lot of time to wind the wire. Furthermore, when a wire is wound around a toroidal core with a long axial length of the toroidal core, the wire slacks and kinks occur near the center of the axial direction, and the occupancy rate of the wire within the inner diameter deteriorates. There was a limit to the number of times. Furthermore, the slack of the electric wire causes contact between the winding layers, which is also a cause of layer short circuit (poor pressure resistance). On the other hand, since the conductor portion of the electric wire 13 at the beginning and end of the winding serves as the input / output terminal as it is, it bends during the work of incorporating the inductor into the device, which deteriorates the workability.

[0004]

[Means for Solving the Problems]

 The present invention is a printed circuit board in which a strip-shaped flat cable formed of a plurality of conductors is loosely inserted into the inner diameter of a toroidal core, and a plurality of conductor patterns are formed on the exposed portions of the conductors at both ends of the flat cable. Of the toroidal core, wherein the plurality of conductors and the conductor pattern are wound around the toroidal core to form a continuous conductor. The toroidal core is formed into a shape, and the flat cable is allowed to penetrate so that the width direction is located in the longitudinal direction of the rectangular inner diameter of the toroidal core. A terminal block having a groove on the surface opposite to the surface of the printed circuit board that contacts the toroidal core is formed in the wiring land portion connected to the flat cable.

[0005]

[Action]

 According to the present invention, a coil is formed by a conductor of a flat cable and a printed board in winding to a toroidal core, and a terminal block is formed at a portion corresponding to a winding start and a winding end of the coil. The winding work can be performed multiple times at the same time, improving workability and reliability.

[0006]

【Example】

 FIG. 1 is a component block diagram showing an embodiment according to the present invention. The flat cable 1 is formed in a U shape, and one end of each of the left and right conductor exposed portions 7 and a plurality of conductor exposed portions 8 from which the insulating coating is removed are exposed at both ends. The left and right sides in the drawing are symmetrical. The pitch 5 of the conductor exposed portions 7 and 8 of the flat cable 1 and the adjacent hole pitch 6 of the holed wiring land 11 of the printed circuit board 2 have the same size, and the conductor exposed portions 7 and 8 can be easily attached to the wiring land 11. It is a structure and dimensions that can be inserted. The wiring land 11 may be on both sides or only on the side where the conductor pattern 12 is formed. The toroidal core 3 has a longer axial length than the outer diameter, and the outer diameter and the inner diameter have a rectangular cross section. The lengthwise dimension of the printed circuit board 2 is longer than the axial length of the toroidal core 3. Reference numeral 4 denotes a terminal block, one on each of the left and right sides. The left and right conductor exposed portions 7 corresponding to the winding start and winding end of the flat cable 1 are made longer than the other conductor exposed portions 8. The terminal block 4 is provided with holes 9 through which conductor exposed portions 7 are provided on the left and right, and a groove 10 for accommodating a wiring land 11 of the printed circuit board 2.

After the flat cable 1 is loosely inserted into the inner diameter of the toroidal core 3, the conductor exposed portions 7 and 8 at both ends of the flat cable are inserted into the holes of the wiring land 11 of the printed circuit board 2. The exposed conductor portion 8 of the first turn of the flat cable 1 is connected to the wiring land 11 at the end of the printed circuit board 2, and the wiring pattern 12 of the printed circuit board 2 causes the wiring land 11 and the wiring land 11 corresponding to the start of winding of the second turn. It is connected to the exposed conductor 8 of the second turn. By repeating this relationship, multiple windings are wound around the toroidal core 3. Since the connection between the printed circuit board 2 and the flat cable 1 is flat, the printed circuit board 2 can be solder-welded at one time by a method such as solder dipping. The terminals corresponding to the winding start and winding end of the inductor are such that the hole 9 of the terminal block 4 penetrates the exposed conductor portion 7 of the flat cable 1 and the exposed conductor portion 7 serves as the inductor terminal. After the conductor exposed portions 7 and 8 are welded by soldering, the flat cable 1, the printed board 2, the toroidal core 3 and the terminal block 4 are bonded and fixed with a resin adhesive to be integrated.

[0008]

[Effect of device]

 As described above, by connecting the conductor of the flat cable that penetrates the inside of the toroidal core and the conductor pattern of the printed circuit board located outside the toroidal core to form the terminal block, the winding work is highly reliable. It has become possible to provide inductors with good performance.

[Brief description of drawings]

FIG. 1 is an external perspective view showing a component structure of the present invention.

FIG. 2 is an external perspective view of the inductor of the present invention.

FIG. 3 is an external perspective view showing a conventional inductor.

[Explanation of symbols]

 1 flat cable 2 printed circuit board 3 toroidal core 4 terminal block 5 conductor pitch 6 (wiring land) hole pitch 7 (corresponding to winding start and end) conductor exposed portion 8 conductor exposed portion 9 hole 10 groove 11 wiring land 12 conductor pattern 13 electric wire

Claims (1)

[Scope of utility model registration request] 1. A flat cable formed of a plurality of conductors is loosely inserted into the inner diameter of the toroidal core, and both ends of the flat cable are connected to wiring land portions at both ends of the printed circuit board located on the outer periphery of the toroidal core. Of the toroidal core, wherein the toroidal core is formed into a conductor that is continuous by winding the toroidal core. The flat cable is allowed to penetrate so that the width direction is positioned in the longitudinal direction of the rectangular inner diameter, while the wiring land portion connected to the flat cable at both ends of the printed circuit board located on the outer periphery of the toroidal core, An inductor characterized in that a terminal block having a groove is formed on a surface of the printed circuit board opposite to a surface in contact with the toroidal core.