JPS6031222Y2 - high frequency transformer - Google Patents

Description

[Detailed description of the invention] This invention has a screw core for inductance adjustment screwed inside, and the base of a bobbin with a coil wound outside is inserted into the horizontal hole of the base, and the bobbin is installed parallel to the printed circuit board. In this type of high frequency transformer, the whole is firmly and stably held against the printed circuit board, so that an effective transformer function can always be exhibited.

Conventionally, many of this type of high-frequency transformers have terminals embedded in the base that are inserted and supported by the board, and because the terminals are small, the transformer is often supported unstable due to vibrations and impulses, which prevents transformation. There was a concern that functionality would be affected.

Therefore, in order to directly attach the board to the base or bobbin, there are devices that have vertical or extended leg pieces, but due to their shape, these types of devices not only require a lot of effort in shaping and cutting, but also make it difficult to assemble the windings. There is a disadvantage in that it requires care, which reduces work efficiency, and there is also a great disadvantage in that if a leg piece breaks during work, the entire piece must be discarded.

This proposal is structured as follows in order to eliminate the various disadvantages of Narukami.

That is, as shown in the drawing, a bobbin 4 with a screw core 6 screwed inside and a coil 5 wound around the outside protrudes into a horizontal hole 2 at the center of the plate surface of a flat base 1 with a terminal 3 implanted at the lower end. In the transformer in which the base 4' is inserted and the pot core 7 is covered on the outside of the bobbin, a bifurcated leg piece 9 with a band-shaped wedge is attached to the outside of the pot core at the lower rear end as shown in the first figure.
As shown in the second figure, a circular hoop 8' has a bifurcated leg piece 9 protruding from its lower end.
In the drawing, 10 is a printed circuit board, 11 is a screwdriver insertion hole for adjusting the screw core 6 provided in the center of the back wall of the pot core 7, and 11' is a hollow hoop 8 in the present invention. The above-mentioned screwdriver insertion hole provided in the center of the bottom wall is shown.

This project is configured as described above, and now has 10 printed circuit boards.
When inserting this transducer into a machine, insert the screw core 6 inside and the protruding base 4' of the bobbin 5, which has the coil 5 wound on the outside, into the horizontal hole 2 in the center of the flat base 1 using the usual method. Next, the pot core 7 is covered on the outside of the bobbin, and the pot core 7 is covered with the pot core 7. Next, the pot core 7 is covered with the pot core 7, and the pot core 7 is covered with the pot core 7. At the same time, if the wedged bifurcated leg piece 9 at the lower end of the hoop 8 or 8' is inserted into the board 10 one by one, the wedge part of the leg part will expand from itself on the lower surface of the board, and therefore, the wedge part will be inserted into the board 10 together with the terminal. Securely attached.

In this case, when the transformer is mounted on a printed circuit board as described above, the bifurcated leg piece of the band-shaped wedge material at the lower end of the hoop fitted on the outside of the pot core is inserted into the insertion hole of the board, so that the entire transformer is fixed. Since it is firmly and stably fixed and the screw core can be operated easily and accurately with a screwdriver, it has a remarkable effect that the inductance does not go awry after adjustment, and the transformer can be assembled and manufactured without loss. This is an extremely advantageous device for this type of transformer as it also has practical benefits.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional side view of a bobbin horizontal high frequency transformer equipped with a circular hoop according to the present invention, and Fig. 2 is a longitudinal sectional side view of the same high frequency transformer equipped with an annular hoop according to another embodiment of the present invention. 3 is a perspective view of the conical hoop in FIG. 1, and FIG. 4 is a perspective view of the annular hoop in FIG. 2. 1 is a flat base, 2 is a horizontal hole, 3 is a terminal, 4 is a bobbin, 4
' is the base, 5 is the coil, 6 is the screw core, 7 is the pot core, 8 is the hoop, and 9 is the bifurcated leg piece made of band-like wedge material.

Claims (1)

[Scope of utility model registration request] Insert the one-sided protruding base 4' of the bobbin 4, which has the screw core 6 screwed inside and the coil 5 wound around the outside, into the horizontal hole 2 in the center of the plate surface of the flat base 1 with the terminal 3 implanted at the lower end. In addition, in a transformer in which a pot core 7 is mounted on the outside of the bobbin, a hoop 8 having a wedge-shaped bifurcated leg piece 9 projecting from the lower end is fitted on the outside of the pot core.