JPH067271U - Transformer connection structure - Google Patents

Abstract

(57) [Abstract] [Purpose] It is an object of the present invention to provide a connection structure capable of effectively connecting electronic parts and connecting a transformer with sufficient mounting strength. [Structure] A large number of insertion holes 2 provided on the component insertion surface 22 side
From 0, the leg portion 31 of the electronic component 3 is inserted, and the leg portion 31 protruding to the pattern surface 21 side is soldered 4 to the copper foil 2
3 is a connection structure for connecting the transformer 1 to a substrate 2 connected to the circuit board 3. The leg portion 11 of the transformer 1 is bent in a crank shape, and the tip portion 1 of the leg portion 11 is connected.
3 is inserted into the insertion hole 20 from the pattern surface 21 side, and the bent leg portion 12 that is brought into contact with the pattern surface 21 in this state and the transformer connection portion 24 formed by the copper foil 23 of the pattern surface 21 are soldered. While being connected by attachment 4,
The transformer connecting portion 24 is reinforced by the copper foil reinforcing means 5.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a connection structure for connecting a transformer to a board on which a large number of electronic components are mounted.

[0002]

[Prior art]

 Generally, when mounting an electronic component on a board, insert the leg of the electronic component from a large number of insertion holes provided on the component insertion side, and solder the leg protruding to the pattern side onto the copper foil. It was done by connecting.

Conventionally, when connecting a transformer together with an electronic component to such a board, the leg portion of the transformer is inserted through a large number of insertion holes provided on the component insertion surface side, like the electronic component. This was done by connecting the legs protruding to the pattern surface side to the copper foil by soldering.

[0004]

[Problems to be solved by the device]

 However, in the case of the above-mentioned conventional connection structure, as shown in FIG. 6, since the transformer c occupies a large area on the component insertion surface b of the substrate a, when the transformer c is connected, other electronic components d are connected too much. This makes it impossible to effectively use the component insertion surface b, which causes a problem.

Since the transformer c is heavier in weight than other electronic components d, the connected transformer c is reinforced with an angle f or the like so that the copper foil (not shown) on the pattern surface e is not peeled off. There was an inconvenience that I had to do it.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a connection structure capable of effectively connecting electronic components and connecting a transformer with sufficient mounting strength. There is.

[0007]

[Means for Solving the Problems]

 In order to solve the above problems, the transformer connection structure of the present invention is such that the legs of an electronic component are inserted through a large number of insertion holes provided on the component insertion side, and the legs protruding toward the pattern side are soldered. It is a connection structure for connecting a transformer to a board that is connected to a copper foil by attaching, the legs of the transformer are bent in a crank shape, and the tips of the legs are inserted from the pattern surface side. The bent leg that is inserted into the pattern surface and is brought into contact with the pattern surface in this state is connected by soldering to the transformer connection part formed by the copper foil on the pattern surface. It is reinforced by reinforcement means.

[0008]

[Action]

 According to the present invention, the leg portion of the transformer is bent into a crank shape, the tip end portion of the leg portion is inserted into the insertion hole from the pattern surface side, and in this state, the bent leg portion and the pattern surface are brought into contact with the pattern surface. Since it is connected to the transformer connection part formed by the copper foil by soldering, the transformer can be connected to the substrate without providing a transformer on the component insertion surface side. Further, in this state, the copper foil of the transformer connecting portion is reinforced by the copper foil reinforcing means.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 schematically show the connection structure of the transformer 1.

That is, the connection structure of the transformer 1 of the present invention is a connection structure for connecting the transformer 1 to the substrate 2 to which a large number of electronic components 3 are connected, and the leg portions 11 of the transformer 1 are crank-shaped. The bent leg 12 is bent and the tip leg 13 of the leg 11 is inserted into the insertion hole 20 from the pattern surface 21 side of the substrate 2 and is in contact with the pattern surface 21 side in this state. The transformer connection portion 24 formed by the copper foil 23 of 21 is connected by the soldering 4, and the transformer connection portion 24 is reinforced by the jumper wire 5.

As shown in FIG. 3, the transformer 1 has leg portions 11 projecting from the transformer 1 bent in a crank shape. The leg portion 11 is formed with a bent leg portion 12 that is orthogonal to the protruding direction of the leg portion 11 and a tip leg portion 13 that is parallel to the protruding direction of the leg portion 11.

As shown in FIG. 4, a large number of insertion holes 20 for mounting the electronic components 3 are formed on the substrate 2. A desired pattern of copper foil 23 is formed on one surface of the substrate 2 in accordance with the insertion holes 20 to form a pattern surface 21. Then, the leg portion 31 of the electronic component 3 is inserted from the component insertion surface 22 side which is the other surface side of the substrate 2, and the leg portion 31 protruding to the pattern surface 21 side is soldered to the copper foil 23 of the pattern surface 21. 4 By doing so, the electronic component 3 can be connected to the substrate 2.

In addition, as shown in FIG. 5, a portion of the pattern surface 21 to which the transformer 1 is connected has a sufficient area for the bent leg portion 12 to come into contact therewith, and the transformer connection using the copper foil 23 is performed. The part 24 is formed. A plurality of insertion holes (four in this embodiment) 20 are formed in the transformer connection portion 24, and the jumper wire 5 is inserted into the insertion hole 20 from the component insertion surface 22 side to solder 4 Has been done. An insertion hole 20 is formed adjacent to the transformer connecting portion 24.

In order to connect the transformer 1 to the substrate 2 thus configured, first, the tip leg portion 13 of the leg portion 11 of the transformer 1 is inserted into the insertion hole 20 from the pattern surface 21 side, and the transformer connecting portion is connected. The bent leg 12 of the leg 11 is brought into contact with 24. Then, by soldering 4 the bent leg portions 12 that are brought into contact with the transformer connecting portion 24, the transformer 1 can be connected to the substrate 2.

According to this connection structure, the transformer 1 is located on the pattern surface 21 side. Therefore, when the transformer 1 receives an external impact or the like, the copper foil 23 of the transformer connecting portion 24 is separated from the substrate 2 together with the transformer 1. Although there is a concern that it will be easier, a jumper wire 5 is inserted into the transformer connection portion 24 from the component insertion surface 22 side for soldering 4, so that sufficient connection strength can be obtained.

Further, according to this connection structure, since the transformer 1 is located on the pattern surface 21 side, the electronic component 3 can be freely mounted on the component insertion surface 22 side. However, even if the electronic component 3 is freely mounted on the component insertion surface 22 side, a part of the pattern surface 21 side is covered with the transformer 1. Therefore, at least soldering should be performed on this covered portion. The electronic component 3 to be soldered 4 must be soldered 4 in advance before soldering 4 of the transformer 1.

[0018]

[Effect of device]

 As described above, according to the present invention, the transformer can be connected to the board without providing the transformer on the component insertion surface side, so that the component insertion surface side is effective for connecting other electronic components. Can be used.

Further, since the copper foil on the pattern surface to which the transformer is connected can be reinforced by the copper foil reinforcing means, it is possible to prevent the copper foil from being separated from the portion to which the transformer is connected even if an external impact is applied. It is possible to obtain excellent mounting strength.

[Brief description of drawings]

FIG. 1 is a perspective view showing an outline of an overall configuration of a transformer connection structure.

FIG. 2 is a side view showing an outline of an overall configuration of a transformer connection structure.

FIG. 3 is a partial side view showing a main part of a transformer.

FIG. 4 is a partial plan view showing a component insertion surface and a pattern surface of a board.

FIG. 5 is a partially enlarged plan view showing a connecting portion between a transformer and a substrate and a sectional view taken along the line I-I.

FIG. 6 is a side view showing a connection structure of a conventional transformer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 transformer 11 leg 12 bent leg 13 tip leg (tip) 2 substrate 20 insertion hole 21 pattern surface 22 component insertion surface 23 copper foil 24 transformer connection portion 3 electronic component 31 leg portion 4 soldering 5 jumper wire ( Copper foil reinforcement means)

Claims (1)

[Scope of utility model registration request] 1. A substrate in which a leg portion of an electronic component is inserted from a large number of insertion holes provided on the component insertion surface side, and the leg portion protruding toward the pattern surface side is connected to a copper foil by soldering, A connecting structure for connecting a transformer, in which the legs of the transformer are bent in a crank shape, and the tips of the legs are inserted into the insertion holes from the pattern surface side, and in this state, they are brought into contact with the pattern surface. The bent leg portion and the transformer connecting portion formed by the copper foil on the pattern surface are connected by soldering, and the transformer connecting portion is reinforced by the copper foil reinforcing means. Connection structure.