JPH06168831A - Coil device - Google Patents

Abstract

PURPOSE:To make a transformer small-sized and complex without lowering a characteristic by a method wherein a conductor of a printed board is incorporated into a part of a winding, a U-shaped conductor is automatically inserted, an iron core is mounted while inserting a separately wound coil into the inside of a single solenoid coil and a diode or the like is inserted into one of the U-shaped conductors. CONSTITUTION:A plurality of conductor patters 2 previously prepared on a printed board 3 are incorporated as a part of winding and a U-shaped conductor 1 is inserted and connected every turn. After providing a plurality of these in the solenoid shape, the winding properly mounted with an iron core 4 is made a coil device directly attached to the printed board 3. Further, as a complex type of a transformer, a temperature fuse 5, a diode 7, a transistor 3 are mounted on and connected to its one winding part. Thereby, the coil device is made low-backed while simplifying mounting work and automatically being made complex.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to miniaturization, simplification, combination, performance improvement and productivity improvement of coil devices for electric and electronic equipment.

[0002]

2. Description of the Related Art Conventionally, a coil device is manufactured by winding a winding conductor around a bobbin or the like independently in a single-layer or multi-layer solenoid form and, if necessary, winding two or more coils on the same bobbin. Or a section division winding structure separated by convex portions (flange) provided on the bobbin. A silicon steel plate, an iron core such as ferrite is appropriately inserted inside to increase the inductance, and the completed coil / inductor or transformer is attached to a printed circuit board or the like by metal fittings or the like. In addition, recently, some of them have a surface mount structure.

For safety, a power supply transformer is connected to a winding after inserting a temperature fuse into the winding and pulling out a lead wire. In addition, when a DC output is obtained, a diode is connected to a circuit separately prepared on a printed circuit board, and in any case, it is not advanced in terms of combination and simplification.

Miniaturization of coil inductors and transformers,
In particular, the reduction in height and the increase in frequency are often dealt with by reducing the cross section of the magnetic circuit, and as a result, the electromotive voltage (V / T) per turn is unavoidable and is often reduced. Due to the winding structure, the characteristics and performance (eg, voltage fluctuation rate, internal impedance, leakage inductance reliability, etc.) of the coil / inductor and the transformer are rarely improved, but rather severe. At the same time, the coil / inductor and the transformer are designed to balance the copper loss, the iron loss and the cost of the used material in pursuit of cost reduction of the coil itself, and the multi-winding structure is common. As a result,
The leakage inductance and internal impedance are large, which causes the generation of noise and the increase in the voltage fluctuation rate.It is the current situation that we are improving by adding noise countermeasures and regulator circuits. In terms of aspects, it cannot be said that the improvement is progressing.

[0005]

The problem to be solved is that the conventional coil device sacrifices characteristics and performance,
The point is that size reduction, height reduction, and cost reduction have been carried out, and further compounding has not progressed.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a plurality of conductor patterns prepared in advance on a printed circuit board are taken in as a part of a winding, U-shaped conductors are inserted and connected for each winding, and a plurality of these solenoids are connected. After the coil is installed in the shape of a coil, a coil device in which an iron core is appropriately mounted is directly attached to a printed circuit board, and as a composite type of a transformer, a thermal fuse, a diode, a transistor, etc. are mounted and connected in one winding part. It was realized by such things.

[0007]

1 shows an example of a basic winding structure of a coil device according to the present invention. Reference numeral 1 is a U-shaped conductor which is manufactured by an automatic insertion machine or the like, 2 is a connecting conductor on the surface of a printed circuit board, and 3 is a printed circuit board. Although not shown, an auxiliary conductor may be separately provided on the two conductors so as to increase the current capacity. These coil devices are independent air core, iron core,
A plurality of them are combined and applied to various coil devices.

FIG. 2 shows a transformer equipped with an iron core according to an embodiment of the present invention. 4 is an iron core, 9 is a primary winding, 10
Is an example of a secondary winding. It is also possible to divide 9 and 10 into a plurality of parts and connect them in series and in parallel in an alternating arrangement. In addition, a method in which the windings 9 and 10 are manufactured in advance and then an iron core is mounted, or after the iron core is fixed to a printed board, the windings 9 and 1 are
Any method of producing 0 may be used.

3 and 4 show another embodiment of the present invention, which is an example of a transformer in which a thermal fuse, a diode and the like are combined in each winding. FIG. 3 shows a structure in which a leaded one is inserted in the upper part, 5 is an example of a thermal fuse, and 7 is an example of a diode. FIG. 4 shows a structure in which the surface mount chip type is mounted on the back surface of the printed board, 6 is a thermal fuse chip, and 8 is an example of a diode chip. Others are the same as those in FIGS.

The basic winding structure of the conventional coil device is well known and will not be described.

[0011]

As described above, the coil device of the present invention can easily achieve a low profile by incorporating the conductor of the printed circuit board in a part of the winding. Further, winding work can be performed by continuously and automatically inserting the U-shaped conductor into the printed circuit board, and at the same time, the coil device is attached to the printed circuit board and the like, and the iron core is simply inserted and fixed to mechanically operate the machine. Since the installation is completed, special installation metal fittings and installation work can be omitted. Furthermore, by appropriately mounting the components such as the thermal fuse and the diode during the winding work, the compounding is automatically achieved. Especially, the space on the printed board for mounting the components such as the diode and the mounting work are not required, and the electronic device is not required. The productivity during the manufacturing process is improved. As a ripple effect, it is also possible to dissipate heat generated by a diode or the like on the conductor of the iron core printed circuit board and use the iron core or the like for the heat sink.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a perspective view of a winding structure which is the basis of the present invention.

FIG. 2 is an explanatory view showing a perspective view of an embodiment of a transformer using the winding structure of the present invention.

FIG. 4 is an explanatory diagram showing an example of a composite transformer using the winding structure of the present invention.

[Explanation of symbols]

 1 U-shaped conductor 2 Printed circuit board conductor pattern 3 Printed circuit board 4 Iron core 5 Thermal fuse 6 〃 Chip 7 Diode 8 〃 Chip 9 Primary winding 10 Secondary winding

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[Procedure amendment]

[Submission date] November 25, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Added

[Correction content]

[Brief description of drawings]

FIG. 1 is an explanatory view showing a perspective view of a winding structure which is the basis of the present invention.

FIG. 2 is an explanatory view showing a perspective view of an embodiment of a transformer using the winding structure of the present invention.

FIG. 3 is an explanatory view showing a perspective view of another embodiment of the transformer using the winding structure of the present invention.

FIG. 4 is an explanatory diagram showing an example of a composite transformer using the winding structure of the present invention.

[Explanation of symbols] 1 U-shaped conductor 2 Printed circuit board conductor pattern 3 Printed circuit board 4 Iron core 5 Thermal fuse 6 Chip 7 Die-auto 8〃 Chip 9 Primary winding 10 Secondary winding

Claims (2)

[Claims] 1. A coil device in which a single-layer solenoid coil is directly attached to a printed circuit board by inserting one or more U-shaped conductors into the printed circuit board and connecting them to a conductor provided in advance on the printed circuit board, and a coil device for the coil device. A coil device in which one or more other coils wound around a bobbin or the like are inserted inside, and a coil inductor or transformer in which an iron core such as a silicon steel plate or ferrite is inserted inside these coil devices. 2. The coil device according to claim 1, wherein a thermal fuse with a lead, a diode, a transistor or the like is inserted into at least one turn of the unit winding, or a cut portion is provided like a conductor on a printed circuit board, and the cut portion is provided. A coil / inductor or transformer in which a thermal fuse, a diode chip, a transistor chip, etc. are mounted on the core, and the core and conductors of the printed circuit board are used as heat sinks for diodes.