JPS60254715A - Bobbin for transformer - Google Patents

Abstract

PURPOSE:To realize common use of bobbin for radial or axial type transformer, reduce a number of parts and save the cost of metal molds by changing the position for implanting pin terminals in the same bobbin. CONSTITUTION:The pin holes for insertion of terminal pins 18 to which the lead wires are connected at the lower surface of the one collar 15 and the pin holes 19, 22 for insertion of terminal pins 18 to which the lead wires are connected at the side surface of the other collar 20 and the one collar 15. If a transformer providing, for example, small fitting area is required from the point of view of electrical characteristic and shape, an axial system coil can be formed by connecting lead wires to the terminal pins 18 implanted to the lower surface of the one collar 15. In case, on the contrary, if a transformer of lower height from the point of view of electrical characteristic and shape is required, a radial system coil can be formed by implanting the terminal pins 18 to the pin holes 19, 22 at the side surfaces of the other collar 20 and the one collar 15 and connecting the lead wires to the terminal pins 18.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a winding frame for a transformer used in various audio equipment, video equipment, industrial equipment, etc.

Conventional configurations and their problems In recent years, market needs for electronic devices have been diversifying, as exemplified by the terms ``light, thin, short, and small.'' The transformer industry is also receiving similar demands.

The conventional transformer mentioned above will be explained below with reference to the drawings.

FIG. 1 shows a radial type winding frame in which a magnetic material is inserted perpendicularly to the pin insertion direction.

FIG. 2 shows an axial type winding frame in which a magnetic material is inserted horizontally to the pin insertion direction.

First, the radial type winding frame 1 shown in FIG.
A lead guide groove 6 is provided in the terminal portion 4, and a terminal pin 6 is planted on the lower surface.A wire is wound on the winding frame 1, and the lead wire 7 of the winding is inserted into the lead guide groove. 5 and connected to a terminal pin 6, and further incorporates an EI type magnetic material 8 to form a transformer.

The axial type winding frame 9 shown in FIG. 2 includes an upper end flange 1o and a lower end flange 13 in which a terminal pin 11 is implanted on the lower surface and a lead guide groove 12 is provided.

To explain with reference to the radial type diagram in FIG. 1, the lead wire 7 passed through the lead guide groove 6 is wound around the base of the terminal pin 6 planted on the lower surface of the terminal portion 4 of the winding frame 1. Thereafter, the soldered magnetic material 8 is inserted into the magnetic material insertion hole provided in the center of the winding frame 1, thereby completing the transformer. The same applies to the axial system shown in FIG. When mounted on a printed circuit board, the radial method shown in FIG. 1 causes the magnetic flux to pass parallel to the printed board, and the axial method shown in FIG. 2 causes the magnetic flux to pass at right angles to the printed board. Along with this, leakage magnetic flux is also generated in the same direction, which has a large effect on electronic circuits. Therefore, sufficient consideration must be given to circuit design, and a position and structure that will not cause any adverse effects should be considered. Also, in terms of shape, the radial type shown in Figure 1 has a large mounting area and low height, while the axial type shown in Figure 2 has a small mounting area and high height. The reality is that the decision varies from user to user, and we provide a transformer that meets each user's needs. As a result, the number of parts increases and the total mold cost becomes high.

Purpose of the Invention In view of the above-mentioned drawbacks, the present invention aims to share the winding frame for radial type and axial type transformers by changing the position where pin terminals are installed in the same winding frame, thereby reducing the number of parts and mold cost. This provides a low-cost transformer.

Structure of the Invention In order to achieve this object, the transformer winding frame of the present invention has a pin hole in which a terminal pin to which a lead wire is connected can be implanted on the lower surface of one flange, and a hole on the side of the other flange and one of the flange. A bottle hole is provided on the side where a terminal pin to which the lead wire is connected can be planted.
Radial, changing the pin insertion position according to the user's request.
The structure is capable of using either the axial method, and by adopting this structure, it can be made inexpensive.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 3 shows a winding frame for a transformer according to the present invention.

14 is a winding core made of synthetic resin, one end of this winding core 14 is provided with one collar 16, and this one collar 16 is provided with a lead wire of the winding wire wound around the winding core 14. Several lead guide grooves 16 for pulling out are formed. Furthermore, a guide groove 17 into which an EI or EE type magnetic material is fitted is provided in the middle of the outer end surface of one of the flanges 16.
Bottle holes are provided on both sides of the terminal pin 18 into which the terminal pins 18 are implanted. Furthermore, a pin hole 19 into which a terminal pin 18 is implanted is also provided on one side of the one collar 16.

Further, the other flange 20 is integrally provided at the other end of the winding core 14, and a lead guide groove 21 and a pin hole 22 in which the terminal pin 18 is implanted are provided on one side of the flange 2o.

Furthermore, from both flanges 15 and 20 to the winding core 14, EI
A magnetic material insertion hole 23 into which a magnetic material of the shape or EE shape is inserted is provided.

In this way, the transformer winding frame of the present invention has a pin hole for inserting the terminal pin 18 to which a lead wire is connected on the lower surface of one of the flanges 16, and a 2° side surface of the other flanges and one of the flanges 16.
It has a structure in which a pin hole 19.22 is provided on the side surface of the terminal 5 into which a terminal pin 18 to which a lead wire is connected is inserted.

For example, if the user requires a transformer with a small mounting area due to its electrical characteristics and shape, one of the tsuba 15
A terminal pin 18 is implanted into a bottle hole provided on the lower surface of the terminal pin 18. The terminal pins 18 are not implanted in the pin holes 19 and 22 provided on the side surface of the other collar 20 and the side surface of one collar 16, and are left as they are.

An axial type coil is completed by connecting a lead wire to a terminal pin 18 planted on the lower surface of one of the collars 16.

On the other hand, if a low height is required in terms of electrical characteristics and shape, the terminal pin 18 is not inserted into the pin hole provided on the bottom surface of one flange 16, and the terminal pin 18 is not inserted into the bottom of the other flange 20. Terminal pins 18 are implanted into the via holes 19 and 22 on the sides of the terminal pins 16.

By connecting a lead wire to the terminal pin 18, a radial type coil is completed.

So-called two types of transformers can be implemented using one type of winding frame by changing the positions of the terminal pins inserted into the pin holes provided in the same winding frame.

Effects of the Invention As described above, the present invention has a structure in which two types of terminal pins, radial type and axial type, can be implanted in the same winding frame, and the number of parts and total mold cost can be reduced, resulting in a low-cost transformer. can be provided.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a conventional radial type transformer winding frame, FIG. 2 is a perspective view showing a conventional axial type transformer winding frame, and FIG. 3 is an embodiment of the transformer winding frame of the present invention. It is a perspective view showing an example. 14... Core part, 16... One tsuba, 1
6... Lead guide groove, 17... Guide groove, 18... Terminal pin, 19.22... Bottle hole, 20... Other flange, 21...Lead guide groove, 23...Magnetic material insertion hole. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure 1 \18

Claims (1)

[Claims] A pin hole for installing a terminal pin to which the lead wires of the primary coil and secondary coil are connected is provided on the lower surface of one of the tsuba having a guide groove, and a pin hole is provided on the side of the other tsuba and the side of the above one tsuba. A winding frame for a transformer with pin holes for installing terminal pins.