JPH0553209U - Element with built-in coil - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an element with a built-in coil that facilitates assembly work and uniformizes lead processing. [Structure] The coil portion 105 and the substrate 103 are a case 100.
It is sealed inside, and the case 100 contains silicon 1
14 are filled. Part of the terminal 104 is the case 10
It projects from 0 to the outside. The coil portion is composed of a primary coil and a secondary coil wound around a toroidal core, and the lead 107 of each coil is soldered to the lead connecting portion 108 of the substrate 103. The terminal 104 is soldered to the terminal connecting portion 113.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a coil such as a transformer and an inductor, and a coil built-in element.

[0002]

[Prior Art]

 Conventionally, various coil built-in elements such as a pulse transformer for transmitting a pulse signal, a voltage boosting transformer, or an inductor have been used in various electric circuits. FIG. 5 is a partial plan view of a conventional pulse transformer excluding the lid portion. Further, FIG. 6 is a cross-sectional view taken along the line AA of FIG. 5 in which the lid portion is drawn, and the same portions are denoted by the same reference numerals.

In FIGS. 5 and 6, a coil portion 503 constituted by a toroidal core around which a primary coil and a secondary coil are wound is housed in a case 500 constituted by a container portion 501 and a lid portion 502. Has been done. The leads 505 of the primary coil and the secondary coil are soldered to the terminals 504. A part of the terminal 504 projects outside the case 500. The case 500 is filled with a silicon 506 for fixing the coil portion 503.

When assembling the pulse transformer configured as described above, first, the coil portion 503 is housed in the container portion 501 to which the terminal 504 is coupled, and then the leads 505 of the primary coil and the secondary coil are respectively placed. Solder to the terminal 504. Next, after injecting silicon 506 into the container 501, the lid 502 is fixed to the container 501 and hermetically sealed.

[0005]

[Problems to be solved by the device]

 Since the conventional element with a built-in coil is configured as described above, there is a problem that the workability during assembly is poor, such as the connection between the lead and the terminal is complicated. In addition, since there is no uniformity in the processing of the leads, there is a problem in that structural variations are large and electrical characteristics vary greatly.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a coil-embedded element that facilitates assembly work and uniformizes lead processing.

[0007]

[Means for Solving the Problems]

 The device with a built-in coil of the present invention includes a substrate having a hole, a lead connection portion and a terminal connection portion, a coil portion whose leads are electrically connected to the lead connection portion, and a case for housing the substrate and the coil portion. And a fixing member filled in the case, and a terminal electrically connected to the terminal connecting portion and protruding to the outside of the case.

[0008]

[Action]

 The lead of the coil portion is connected to the substrate, the terminal connecting portion of the substrate is connected to the terminal, and the coil portion and the substrate are sealed together with the fixing member in the case.

[0009]

【Example】

 FIG. 1 is a view showing a pulse transformer according to an embodiment of the present invention, and is a plan view with a lid part omitted. 2 is a sectional view taken along the line BB of FIG. 1 illustrating the lid portion, and the same portions as those in FIG. 1 are denoted by the same reference numerals. 3 and 4 are a plan view and a bottom view of a substrate used for the pulse transformer of this embodiment, respectively, and the same parts as those in FIGS. 1 and 2 are designated by the same reference numerals. The substrate 103 has a silicon injection hole 106, a lead connection portion 108 for lead connection, a terminal connection portion 113 electrically connected to the lead connection portion 108, and alignment recesses 110, 112. There is.

Hereinafter, the pulse transformer of the present embodiment will be described with reference to FIGS. 1 to 4. 1 to 4, the coil portion 105 and the substrate 103 are hermetically sealed in a case 100 composed of a container portion 101 and a lid portion 102, and the case 100 is filled with silicon 114. A part of the terminal 104 projects from the case 100 to the outside. The coil portion 105 is composed of a primary coil and a secondary coil wound around a toroidal core, and the lead 107 of each coil is soldered to the lead connecting portion 108 of the substrate 103. The terminal 104 is soldered to the terminal connecting portion 113. Further, the concave portions 110 and 112 of the substrate 103 engage with the convex portions 109 and 111 of the container portion 101, respectively, and are arranged at predetermined positions.

A manufacturing process of the pulse transformer configured as described above will be described below. First, after each lead 107 of the coil portion 105 is soldered to the lead connecting portion 108 of the substrate 103, the coil portion 105 and the substrate 103 are housed in a case 100 constituted by a container portion 101 and a lid portion 102. . At this time, since the concave portions 110 and 112 of the substrate 103 and the convex portions 109 and 111 of the container portion 101 are engaged with each other, the substrate 103 is stored at a predetermined position so that the terminal 104 and the terminal connecting portion 113 are substantially in contact with each other. Become. In this state, the terminal 104 and the terminal connecting portion 113 are soldered. Next, silicon 114 as a fixing member for fixing the coil portion 105 is injected from the hole 106 into the container portion 101. Thereafter, the lid portion 102 is fixed to the container portion 101 to seal the substrate 103, the coil portion 105, and the silicon 114, thus completing the pulse transformer.

In the above-described embodiment, the hole 106 is provided at the center of the substrate 103 in order to facilitate the filling with silicon, but it may be provided at the end of the substrate 103. In addition, although the example of the pulse transformer is shown in the present embodiment, any element having a coil such as a step-up transformer or an inductor may be used. As described above, in this embodiment, since the board 103 having the hole 106, the lead connecting portion 108 and the terminal connecting portion 113 is used, the soldering work to the terminal 104 becomes easy. Further, since it is possible to standardize the processing of the leads 107, it is possible to reduce structural variations and suppress variations in electrical characteristics. Furthermore, the effect of facilitating the silicon implantation is produced.

[0013]

[Effect of the device]

 The device with a built-in coil of the present invention is particularly configured to connect the leads of the coil part to the substrate having the hole, the lead connection part and the terminal connection part and to house the coil part and the substrate in the case. As a result, there is an effect that the assembling work becomes easy, the lead processing can be standardized, and the fixing member can be easily injected.

[Brief description of drawings]

FIG. 1 is a partial plan view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line BB of the embodiment shown in FIG.

FIG. 3 is a plan view of a substrate used in the embodiment shown in FIG.

FIG. 4 is a bottom view of a substrate used in the embodiment shown in FIG.

FIG. 5 is a partial plan view of a conventional pulse transformer.

6 is a cross-sectional view taken along the line AA of the conventional pulse transformer shown in FIG.

[Explanation of symbols]

 100 ... Case 101 ... Container 102 ... Lid 103 ... Substrate 104 ... Terminal 105 ... Coil 106 ... Hole 107 ... Lead 108 ... Lead Connection 113 ... Terminal connection part 114 ... Silicon as a fixing member

Claims (1)

[Scope of utility model registration request] 1. A substrate having a hole, a lead connecting portion and a terminal connecting portion, a coil portion whose leads are electrically connected to the lead connecting portion, a case for housing the substrate and the coil portion, and the case. An element with a built-in coil, comprising: a fixing member filled inside; and a terminal electrically connected to the terminal connecting portion and protruding to the outside of the case.