JPH0227544Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to the construction of a circuit block including a transformer.

[Prior art and its problems]

When configuring a circuit block that includes a transformer,
Conventionally, as shown in the front view of FIG. 6, circuit elements such as a transformer 2, a transistor 3, a resistor 4, etc. were mounted on a common main circuit board 1 in a two-dimensional manner. Therefore, the planar area becomes large, which is disadvantageous from the standpoint of miniaturization. In addition, other circuits are also constructed on the main circuit board 1 and are connected to each other through conductor patterns, so it is difficult to test each circuit block including the transformer alone. Also, 1 of the whole circuit
Since the circuit block is constructed as a single unit, it is not possible to physically separate the circuit block and use it for another main circuit board.

〔the purpose〕

The purpose of the present invention is to construct an independent circuit block by fixing a circuit board on which circuit elements other than the transformer are attached to the transformer using L-shaped terminal pins provided on the transformer. The object of the present invention is to solve the problems of the prior art by making it possible to fix a transformer to a main circuit board on which other circuits are constructed.

[Technical means to solve problems]

In the circuit block of the present invention, L-shaped terminal pins are embedded in the flanges at both ends of the winding part of the transformer, and the tips of the terminal pins are exposed, and the tips of at least one side of the terminal pins are used to connect circuit elements. This is characterized by fixing the circuit board on which the transformer is attached to the transformer.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the circuit block of the present invention will be described below with reference to FIG. 1, which is an exploded perspective view, and FIG. 2, which is an assembled front view. Note that the core shown in FIG. 1 is not shown in FIG. 2.

In Figures 1 and 2, 10 is a transformer, 1
1 is a circuit board, 12 and 13 are cores made of ferrite, 14 is a winding portion, and 15 is a flange portion.

The transformer 10 has flange portions 15 integrally formed at both ends of a winding portion 14. The winding portion 14 is hollow and open at flange portions 15 at both ends. Then, the center part 16 of the E-shaped core 12 is inserted into the winding part 14, and the I-shaped core 13 is inserted into the core 12 from the opposite side.
It is fixed at the tip of.

The lower side of the flange portion 15 is thickened,
A plurality of L-shaped terminal pins 17 are embedded therein. The terminal pins 17 have their tips exposed both in the horizontal direction parallel to the winding section 14 and in the vertical direction, and are connected to the leads of the windings wound around the winding section 14 . Then, connect the horizontal tip 17A to the circuit board 11.
The circuit board 11 is fixed to the transformer 10 on the outer surface of the flange portion 15 by inserting it into the through hole 18 and soldering. The circuit board 11 includes circuit elements 19 other than the transformer 10 constituting the circuit block.
are attached and connected to each other by a conductor pattern (not shown). Further, the circuit configured on the circuit board 11 is connected to the transformer 1 through the hole 18 and the terminal pin 17.
Connect to winding 0.

The connection between the circuit block and other circuits is achieved by inserting the vertical end 17B of the terminal pin 17 into the main circuit board 20 on which other circuits are configured, and connecting the transformer to the winding part 14 of the terminal pin 17, as shown in FIG. This is done by fixing 10. In this way, the terminal pin 17 is connected to the transformer 10.
connecting the leads, fixing the circuit board 11 to the transformer 10, connecting the circuit board 11 and the transformer 10,
It also has the role of connecting circuit blocks to other circuits. Note that the winding part 14 may be divided into a plurality of parts by providing another flange part in the center.

Figure 3 is a circuit diagram of a switching power supply.
This is an example of a circuit that can be easily constructed using the circuit blocks of the present invention, and will be briefly explained in correspondence with FIG.

A drive circuit 21 on the primary side of the transformer including a switching transistor Q is configured on the circuit board 11,
Connecting points 22A, 22B, 22C, and 22D correspond to four holes 18 to connect drive circuit 21 to transformer 10.
Connect to the primary winding of Although not shown in FIG. 1, a circuit board that constitutes the rectifying and smoothing circuit 23 on the secondary side of the transformer is also fixed to the terminal pin 17 of the flange 15 on the opposite side, and connected to the secondary winding of the transformer 10. By connecting them, a circuit block that constitutes a switching power supply can be obtained.

FIG. 4 is a front view showing another embodiment of the circuit block of the present invention.

Terminal pins 34 are embedded in the flange portions 32 at both ends of the winding portion 31 of the transformer 30, unlike in FIGS. 1 and 2, on the upper and lower sides. The circuit board 33 is fixed to the outer surface and the upper three surfaces of the flange portion 32. Both ends of the upper terminal pin 34 in the horizontal direction parallel to the winding portion 31 and in the vertical direction are used to fix the circuit board 33. The lower terminal pin 34 connects the horizontal tip 34A to the circuit board 3.
3, and the vertical tip 34B is used to connect the circuit block to other circuits.

In this embodiment, the circuit elements attached to the circuit board 33 are not shown, but since the board can be fixed on three sides and connections can be made between the circuit boards 33, a complex circuit can be constructed using a large number of circuit elements. It can be used for circuit blocks.

FIG. 5 is a front view showing still another embodiment of the circuit block of the present invention.

The flange parts 42 and 43 at both ends of the winding part 41 of the transformer 40 are located above and below, and the lower flange part 4
A terminal pin 44 is embedded in 3. circuit board 45
is fixed parallel to the winding part 41 by a tip 44B of a terminal pin 44 extending perpendicularly to the winding part 41. The tip 44A of the terminal pin 44 is parallel to the winding portion 41.
is used to connect circuit blocks to other circuits. In this embodiment, the planar size is within the range of the spread of the lower flange portion 43, so if the winding portion 41 is long, the circuit block can be formed with a relatively small plane.

In any of the embodiments, the entire portion except the terminal pins may be sealed with resin. Furthermore, in the shape of the transformer, the winding portion and the flange portion do not need to be integral. Furthermore, in the embodiments of FIGS. 1 and 2, the positions of the main circuit board 20 and the circuit board 11 can be replaced with each other.

〔effect〕

As described above, the circuit block of the present invention is constructed by fixing the circuit board to the transformer using L-shaped terminal pins embedded in the flange portion, and attaching circuit elements other than the transformer to the circuit board. . The terminal pins also serve as connections between the circuit board and the transformer windings, and between the circuit block and other circuits on the main circuit board. Therefore, since only the circuit block can exist independently, it is possible to test only that part. And since it can be freely fixed to the main circuit board from the outside,
If it is designed with common specifications for various main circuit boards, it can be used with wide versatility. Of course, it is obvious that structuring the circuit block vertically is advantageous in terms of miniaturization.

[Brief explanation of the drawing]

Figure 1 is an exploded perspective view showing an embodiment of the circuit block of the present invention, Figure 2 is an assembled front view of Figure 1, and Figure 3 is an assembled front view of Figure 1.
The figure is a circuit diagram of one example that can be constructed using the circuit block of the present invention, FIG. 4 is a front view showing another embodiment of the circuit block of the present invention, and FIG. 5 is a front view showing still another embodiment. 6 are front views of conventional circuit blocks. 10, 30, 40: transformer, 11, 33, 4
5: circuit board, 12, 13: core, 14, 31,
41: Winding part, 15, 32, 42, 43: Flange part, 17, 34, 44: Terminal pin, 18: Hole,
19: circuit element, 20: main circuit board.

Claims (1)

[Scope of utility model registration request] L on the flanges at both ends of the transformer winding.
A circuit block characterized in that a circuit board having a circuit element attached thereto is fixed to a transformer using a shaped terminal pin buried with its tip exposed, and using the tip of at least one side of the terminal pin. .