JPH064572Y2 - Trance - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a prone type transformer, and more particularly to a transformer in which the shape of a pin provided on a transformer bobbin is improved.

[0002]

2. Description of the Related Art As shown in FIGS.
As this type of transformer, a surface mounting type and a discrete type are known. First, in the surface mount type transformer 1 shown in FIG. 8, the transformer bobbins 3 are mounted on both sides of the transformer body 2, and a plurality of straight pins 5 for mounting on the printed board 4 are mounted on each transformer bobbin 3. It is inserted from the lateral direction and overhanged. Further, a printed circuit board 4 on which the surface mount type transformer 1 is mounted.
Are formed in advance as shown in FIG. As shown in the figure, the printed circuit board 4 is formed with a rectangular opening 4a into which the transformer body 2 having the trans bobbin 3 mounted therein is dropped.
The same number of lands 6 as the straight pins 5 inserted into the trans bobbin 3 are formed on both side edge portions of the. The surface mount type transformer 1 is mounted on the printed circuit board 4 by dropping the transformer main body 2 having the transformer bobbin 3 mounted in the opening 4a of the printed circuit board 4 and placing the trans bobbin 3 on the land 6. The straight pins 5 inserted in the are contacted and the cream solder is melted in a heating furnace, so that the solder connection is performed by so-called reflow or the like.

Next, in the discrete type transformer 11 shown in FIG. 10, the transformer bobbins 13 are mounted on both sides of the transformer main body 12, and each transformer bobbin 13 is attached.
A plurality of straight pins 1 for mounting on the printed circuit board 14
5 is inserted from below and hung down. Also,
The printed circuit board 14 on which the discrete type transformer 11 is mounted is formed in advance as shown in FIG. Printed circuit board 1 as shown
The same number of through holes 16 for inserting the straight pins 15 hanging down from the trans bobbin 13 are formed in 4. The discrete type transformer 11 is mounted on the printed circuit board 14 by inserting the straight pin 15 hanging from the trans bobbin 13 into the through hole 16 of the printed circuit board 14 and mounting the lower surface of the trans bobbin 13 on the printed circuit board 14. The straight pins 15 are brought into contact with the printed circuit board 14 and passed through the through holes 16 and are soldered on the back surface of the printed circuit board 14.

[0004]

By the way, in the conventional transformers 1 and 11 of this type, the straight pins 5 and 15 are provided on the transformer bobbins 3 and 13 of the surface mounting type and the discrete type. In this case, since the pin structure is different, the transformers 1 and 11 cannot be used for both the surface mounting type and the discrete type, so that each type of transformer must be prepared according to the use of each type. .

In view of the above problems, an object of the present invention is to provide a transformer which has a single pin structure and can be used for both surface mounting type and discrete type.

[0006]

SUMMARY OF THE INVENTION In the transformer of the present invention, the above-mentioned object is to mount a transformer bobbin on both sides of the transformer main body, and insert a plurality of pins for mounting on the substrate in each transformer bobbin. In the transformer of the die shape type, by inserting a plurality of L-shaped pins bent downward into the respective trans bobbins from the lateral direction,
To be achieved.

[0007]

According to the above construction, the prone-shaped transformer is formed by mounting the transformer bobbins on both sides of the transformer body and inserting a plurality of pins for mounting the transformer bobbins on the substrate. In the transformer thus formed, a plurality of L-shaped pins bent downward are inserted into the respective trans bobbins from the lateral direction, so that each pin has a horizontal portion and a vertical portion depending from the horizontal portion. Will have a structure with.

When the transformer according to the present invention is used as a surface mount type, a rectangular opening is formed in the substrate in advance and through holes of the same number as the pins are formed on both side edges of the opening. As many lands as the pins are formed between the opening and the through hole. To mount the transformer according to the present invention on the substrate formed in this way, the transformer body having the transformer bobbin mounted therein is dropped into the opening, and the vertical portion of the L-shaped pin is inserted into the through hole. The horizontal portion of the character pin is brought into contact with the land, and the cream solder is melted in a heating furnace, so that the solder connection is performed by so-called reflow or the like.

When the transformer according to the present invention is used as a discrete type, the same number of through holes as the pins are formed on the substrate in advance. The transformer thus formed is mounted on the substrate by inserting the vertical portion of the L-shaped pin into the through hole and soldering the tip of the L-shaped pin on the back surface of the substrate.

Therefore, the transformer according to the present invention has a single pin structure and can be used for both the surface mounting type and the discrete type.

[0011]

【Example】

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic front view showing a transformer 21 according to this embodiment. As shown in the drawing, the transformer 21 of the present embodiment is a bottom type transformer, and a transformer bobbin 23 having an L-shaped front surface is mounted on both sides of a rectangular parallelepiped transformer body 22. That is, each trans bobbin 23 has the above-mentioned transformer main body 22.
It is attached so that it projects from both sides. The height of the transformer main body 22 is set so that when the lower surface of the transformer bobbin 23 is located on a plane, there is a gap between the transformer body 22 and the plane.

A plurality of L-shaped pins 24 bent downward are provided on the side surface of the protruding portion 23a of each trans bobbin 23.
Is inserted from the side. The same number of the L-shaped pins 24 are provided on the overhanging portion 23a of each trans bobbin 23, and the L-shaped pins 24 are provided at equal intervals along the width direction of each trans bobbin 23. . Each L
Since the character pin 24 is bent downward, it has a structure having a horizontal portion 24a and a vertical portion 24b depending from the horizontal portion 24a. The horizontal portion 24a of the L-shaped pin 24 is located above the lower surface of the trans bobbin 23, and the vertical portion 24 is suspended below the lower surface of the trans bobbin 23.

The transformer 21 of this embodiment is constructed as described above, and when it is used as a surface mounting type or a discrete type transformer, it is necessary to form a printed circuit board as follows. There is. As shown in FIG. 2, the printed circuit board 25a applied to the surface mounting type has a rectangular opening 26 into which the transformer main body 22 having the transformer bobbin 23 mounted therein is dropped, and the opening 26 The same number of through holes 27a as the L-shaped pins 24 are formed on both side edge portions.
Then, as many lands 28 as the L-shaped pins 24 are formed between the openings 26 and the through holes 27a. That is, this is an improvement by forming the same number of through holes 27a as the lands 6 on both sides of the land 6 of the conventional surface mount type printed circuit board 4 shown in FIG.

Further, as shown in FIG. 3, the printed circuit board 25b applied to the discrete type has through holes 27b as many as the L-shaped pins 24 at predetermined intervals. That is, the structure is similar to that of the conventional discrete type printed circuit board 14 shown in FIG.

Next, the operation of the above embodiment will be described.
According to the present embodiment, the prone type transformer 21 is provided.
Is formed by inserting the trans bobbins 23 on both sides of the transformer main body 22 and inserting a plurality of L-shaped pins 24 bent downward to be mounted on a board in each trans bobbin 23. Each L-shaped pin 24 has a structure having a horizontal portion 24a and a vertical portion 24b depending from the horizontal portion 24a.

When the transformer 21 of this embodiment having such a pin structure is used as a surface mounting type, as shown in FIGS. 4 and 5, the mounting is performed on the surface formed in advance as described above. The transformer main body 22 with the above-mentioned transformer bobbin 23 is dropped into the opening 26 of the mounting type printed circuit board 25a, and L is inserted into the through hole 27a.
The so-called reflow in which the vertical portion 24b of the L-shaped pin 24 is inserted and the horizontal portions 24a of the L-shaped pin 24 are brought into contact with the respective lands 28 to melt the cream solder coated on the lands 28 in a heating furnace. It is made by soldering by using the above method.

Further, when the transformer 21 of this embodiment is used as a discrete type, as shown in FIGS. 6 and 7, the mounting is performed by the preformed discrete type printed circuit board 25b as described above. The vertical portion 24b of the L-shaped pin 24 is inserted into the through hole 27b formed in the L-shaped pin 24, and the lower surface of the trans bobbin 23 is brought into contact with the printed circuit board 25b.
It is made by soldering the tip of the back side of the board.

Therefore, the transformer 21 of the present embodiment has a single pin structure in which a plurality of L-shaped pins 24 bent downward are inserted into each transformer bobbin 23. Can be used for both.

[0019]

As described above, the transformer according to the present invention has an excellent effect that it can be used as both a surface mounting type and a discrete type with a single pin structure.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an embodiment of a transformer according to the present invention.

FIG. 2 is a schematic plan view showing a printed circuit board applied to a surface mounting type in one embodiment of the transformer according to the present invention.

FIG. 3 is a schematic plan view showing a printed circuit board applied to a discrete type in one embodiment of the transformer according to the present invention.

FIG. 4 is a schematic plan view showing a mounting state when the transformer according to the present invention is used as a surface mounting type.

FIG. 5 is a schematic front view showing a mounting state when the transformer according to the present invention is used as a surface mounting type.

FIG. 6 is a schematic plan view showing a mounting state when the transformer according to the present invention is used as a discrete type.

FIG. 7 is a schematic front view showing a mounting state when the transformer according to the present invention is used as a discrete type.

FIG. 8 is a schematic front view showing a conventional surface mount type transformer.

FIG. 9 is a schematic plan view showing a printed circuit board on which a conventional surface mount type transformer is mounted.

FIG. 10 is a schematic front view showing a conventional discrete type transformer.

FIG. 11 is a schematic plan view showing a printed circuit board on which a conventional discrete type transformer is mounted.

[Explanation of symbols]

 Reference numeral 21 ... Transformer, 22 ... Transformer body, 23 ... Trans bobbin, 23a ... Overhang portion of trans bobbin, 24 ... L-shaped pin, 24a ... Horizontal portion of L-shaped pin, 24b ... Vertical portion of L-shaped pin, 25a, 25b ... Printed circuit board, 26 ... Opening portion, 27a, 27b ... Through hole, 28 ... Land.

Claims (1)

[Scope of utility model registration request] 1. A bottom-shaped transformer in which trans bobbins are mounted on both sides of a transformer main body, and a plurality of pins for mounting on a substrate are inserted in each trans bobbin. The transformer bobbins are bent downward. A transformer characterized in that a plurality of L-shaped pins are inserted laterally.