JPH10335774A - Substrate mounting structure of inductance element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a substrate mounting structure of an inductance element in which a correction of a terminal is not required and mounting is easy and accurate. SOLUTION: Lead wires 14, 15 are connected to a primary side terminal 12 and a secondary side terminal 13 of a transformer 1 being an inductance element. Through holes 22A, 22B inserting respectively the facing primary side terminal 12 and secondary side terminal 13 of the transformer 1 into a substrate 21 are formed. The through holes 22A, 22B are slit-like on a side of the secondary side terminal 13. As a result, a correction of the primary side terminal 12 and the secondary side terminal 13 with respect to the transducer 1 is not required and it becomes possible to make efficient mounting of the transformer 1 and reduce a cost.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting an inductance element on a substrate, and more particularly to a substrate mounting structure for an inductance element which is easy and reliable to mount.

[0002]

Generally, an inductance element represented by a coil, a transformer, or the like is formed by winding a conductive metal wire having a round cross section on a bobbin made of resin or paper, and winding the wire around the bobbin. The drawn wire made of a metal wire is fixed to the opposite terminal fixed to the bobbin.

FIGS. 1 to 4 show the structure of a transformer having a split-type bobbin as an example of such an inductance element.
Shown in In FIG. 1, a transformer 1 has a core 2 forming a magnetic circuit, and a bobbin 3 made of, for example, plastic and mounted on the core 2. The bobbin 3 has a core 2
The upper flange 5 is attached to both ends of the body 4 through which the main legs 2A are inserted.
And a lower flange portion 6 are formed. Also, 7,8
Is a flange-shaped partition wall formed at an appropriate position on the trunk 4,
The body 4 is partitioned into a plurality of steps by the partition walls 7 and 8. A primary winding 9 on the input side of the inverter circuit is wound around the intermediate body 4A, and a secondary winding on the output side of the inverter circuit is wound around the upper body 4B and the lower body 4C. Half of 10, 11 are wound.

[0004] Below the lower flange portion 6, a plurality of primary terminals 12 project from one side, and a plurality of secondary terminals 13 project from the other side. Guide recesses 16, 17, into which the respective lead wires 14 of the primary winding 9 or the respective lead wires 15 of the secondary windings 10, 11 are engaged, are provided on the outer periphery of the lower flange 6 and the partition walls 7, 8. 18 are formed. And
Each lead wire 14 of the primary winding 9 wound around the intermediate body 4A is
After being entangled with the primary terminal 12 while being guided by the guide recesses 17 and 18, the lead wire 15 of the secondary winding 10, which is connected by soldering and wound around the upper body 4 </ b> B, is guided by the guide recesses 16, 17 and 17. After being entangled with the secondary terminal 13 while being guided by 18, the secondary winding is connected by soldering and further wound around the lower body 4C.
The lead wire 15 of the eleventh is entangled with another secondary terminal 13 while being guided by the guide concave part 18, and then connected by soldering.

In the above-described transformer, the primary terminal 12 and the secondary terminal 13 are inserted into small through holes 22A and 22B which are formed opposite to the substrate 21 as shown in FIG. Implemented. However, the primary terminal 12 and the secondary terminal 13 are connected to the primary winding 9, the secondary winding
Since the lead wires 14 and 15 from the secondary winding 10 or the secondary winding 11 are entangled, the wires tend to be bent or deformed by the tension at this time. However, as shown in FIG. 10, the through holes 22A and 22B are formed in correspondence with the interval t when the primary terminal 12 and the secondary terminal 13 are straight, that is, in a state where no deformation occurs. If the primary terminal 12 and the secondary terminal 13 are bent, there is a problem that the mounting of the primary terminal 12 and the secondary terminal 13 of the transformer in the through holes 22A and 22B is hindered. For this reason, it is necessary to perform the correction so that the primary terminal 12 and the secondary terminal 13 are straightened, and the current situation is that a great deal of time and labor is required for the correction.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a substrate mounting structure for an inductance element which does not require correction of terminals and is easy and reliable to mount.

[0007]

According to the present invention, in order to achieve the above object, a winding is wound around a bobbin, and a lead wire of the winding is connected to a plurality of opposed terminals fixed to the bobbin. A structure for mounting an inductance element formed on a substrate, wherein a through hole for inserting a terminal of the inductance element is formed on the substrate, and at least one side of the plurality of opposed terminals of the through hole is long. It is characterized by having a hole shape.

According to the above configuration, even if the terminal is bent or deformed when the lead wire of the winding is connected to the terminal, at least one of the through-holes of the opposing terminal on the substrate has a long hole shape. Because of this, the allowable range for the terminal pitch is widened, and there is almost no need to perform correction.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a substrate mounting structure for an inductance element according to the present invention will be described below with reference to FIG. In the present embodiment, the description will be made based on the case where a transformer is used as the inductance element. However, the transformer shown in FIGS. 1 to 4 is used as the transformer, and the detailed description is omitted.

In FIG. 5, reference numeral 21 denotes a substrate on which the transformer 1 serving as an inductance element is mounted, and a plurality of through holes 22A and 22B are formed on the substrate 21 so as to face each other. The through hole 22A is formed in a long hole shape in the horizontal direction, that is, in the direction opposite to the through holes 22A and 22B, and the through hole 22B is a normal round hole. The through hole 22A is on the secondary terminal 13 side, and the through hole 22B is on the primary terminal 12 side.
Between the primary terminal 12 and the secondary terminal 13
Is a through hole based on the interval t when
The secondary terminal 13 is located at the center O1 of 22A.

Next, the operation of the above configuration will be described. When mounting the transformer 1 on the substrate 21, the secondary terminal 13 is positioned so that the secondary terminal 13 is located in the through hole 22A and the primary terminal 12 is located in the through hole 22B, as shown in FIG. The secondary terminal 13 and the primary terminal 12 are respectively inserted. At this time, as shown by a broken line in FIG.
Of the secondary terminal 13 is bent and the primary terminal 12 and the secondary terminal 13 are bent.
Is different from the prescribed distance t between the primary terminal 12 and the secondary terminal 13, the through hole 22A is in the shape of a long hole, and when the hole is not deformed, the through hole 22A is in the form of a long hole. Since the secondary terminal 13 is positioned at the center O1, the width of the elongated hole of the through hole 22A is within the allowable range, so that the secondary terminal 13 and the primary terminal 12 are securely connected. Can be implemented. In addition, even when the primary terminal 12 is bent, the secondary terminal 13 can be mounted by adjusting the secondary terminal 13 along the elongated hole of the through hole 22A. In particular, the secondary terminal 13 is easily bent or deformed because it is entangled by the lead wire 14 formed by a plurality of windings. In the present embodiment, the through hole 22A on the secondary terminal 13 side is formed into an elongated hole. Therefore, even if a large number of secondary terminals 13 are deformed, they can be mounted reliably and easily.

As described above, in the first embodiment, the substrate
Primary terminal 12 and secondary terminal of transformer 1 facing 21
13 are formed, and the opposed through-holes 22A of the primary terminal 12 and the secondary terminal 13 on the secondary terminal 13 side of the secondary terminal 13 are formed as elongated holes. Even when the primary terminal 12 and the secondary terminal 13 are bent at the time of mounting on the 21, mounting can be performed easily and reliably. Accordingly, it is not necessary to correct the primary terminal 12 and the secondary terminal 13 for the transformer 1, so that the efficiency of mounting the transformer 1 and the cost can be reduced.

Next, a second embodiment of the present invention will be described with reference to FIGS. In the second embodiment, the through hole 22 on the secondary terminal 13 side in the first embodiment described above is used.
Not only A, but also the through hole 22B on the primary terminal 12 side is an elongated hole. And these through holes 22
A and the through-hole 22B are located at the center O1 of the through-hole 22A when the primary terminal 12 and the secondary-side terminal 13 are not deformed.
The primary terminal 12 is located at the center O2 of 22B. By adopting such a configuration, when the transformer 1 is mounted on the substrate 21, the secondary terminal 13 is provided in the through hole 22A in the same manner as in the first embodiment described above.
The secondary terminal 13 and the primary terminal 12 may be inserted so that the primary terminal 12 is positioned at 22B.
At this time, the secondary terminal 13 of the transformer 1 or the primary terminal
Even if 12 is bent, the through-holes 22A and 22B are elongated holes, and in the undeformed state, the secondary terminal 13 is located at the center O1 of the through-hole 22A and the second terminal 13 is located at the center O2 of the through-hole 22B. Since the secondary terminal 12 is located, the width of the elongated hole of each of the through holes 22A and 23A is within the allowable range. Secondary terminal 13
In addition, the primary terminal 12 can be securely mounted. In particular, in this embodiment, since both through holes 22A and 22B are elongated, even if both the secondary terminal 13 and the primary terminal 12 are deformed, they can be mounted reliably and easily. I have.

Although the present invention has been described with reference to the accompanying drawings, the present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. For example, in the first and second embodiments, the case where a transformer is used as an inductance element has been described as an example. However, an inductance element having a structure in which a lead wire such as a metal wire wound around a bobbin is connected to an opposite terminal. Then, it can be widely applied to coils and the like. Further, the elongated hole shape in the present invention is not limited to an elliptical shape as in the first and second embodiments, but also includes an elliptical shape and a rectangular shape.

[0015]

According to the present invention, there is provided a structure for mounting, on a substrate, an inductance element in which a winding is wound around a bobbin and a lead wire of the winding is connected to a plurality of opposing terminals fixed to the bobbin. Forming through holes for inserting the terminals of the inductance element into the substrate,
At least one side of the plurality of opposed terminals of the through hole has a long hole shape, so that it is possible to provide a substrate mounting structure of the inductance element in which the inductance element can be easily and reliably mounted on the substrate.

[Brief description of the drawings]

FIG. 1 is a front view of a transformer applicable to a substrate mounting structure of an inductance element according to the present invention.

FIG. 2 is a side view of the transformer.

FIG. 3 is a rear view of the transformer.

FIG. 4 is a perspective view of the bobbin.

FIG. 5 is a perspective view showing a board in the board mounting structure according to the first embodiment of the present invention.

FIG. 6 is a schematic view showing a mounting process of the first embodiment.

FIG. 7 is a perspective view showing a board in a board mounting structure according to a second embodiment of the present invention.

FIG. 8 is a schematic view showing a mounting process in a board mounting structure according to a second embodiment of the present invention.

FIG. 9 is a plan view showing a conventional substrate.

FIG. 10 is a schematic view showing a mounting process on a conventional substrate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transformer (inductance element) 9 Primary winding (winding) 10, 11 Secondary winding (winding) 12 Primary terminal (terminal) 13 Secondary terminal (terminal) 14, 15 Lead wire 21 Substrate (substrate) 22A, 22B Through hole

Claims (1)

[Claims] 1. A structure for mounting an inductance element in which a winding is wound around a bobbin and a lead wire of the winding is connected to a plurality of opposed terminals fixed to the bobbin, on the substrate, A substrate mounting structure for an inductance element, wherein a through-hole for inserting the terminal of the inductance element is formed in the substrate, and at least one of the plurality of opposed terminals of the through-hole is formed as an elongated hole.