JPS5938066Y2 - Electric circuit components including inductive elements - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The invention relates to an electrical circuit component containing an inductive element.

As an electric circuit component including an inductive element, one shown in FIG. 1 is known.

That is, a rectangular notch 2 is provided on the side of the wiring board 1, and the induction element 3 is inserted into the notch 2.

The inductive element 3 is formed by winding a coil 3b around the middle part of a thrust body 3a made of, for example, a drum-shaped core, and a pair of grooves 3c extending parallel to each other are provided on both end surfaces of the thrust body 3a. .

In such a device, each of the opposing sides of the notch 2 of the wiring board 1 is inserted into each of the notches 3c provided on both end faces of the thrust body 3a of the inductive element 3 and assembled, and then the coil 3a is assembled.
The coil terminal 4 and the wiring layer 1a formed on the wiring board 1 are connected to each other.

In such a conventional electric circuit component, the inductive element 3 protrudes from the front and back sides of the wiring board 10, so the space occupied by the inductive element 3 is relatively small, and the circuit component itself can be made smaller. have

However, in such a conventional device, the connection process between the coil terminal 4 and the wiring layer 1a of the wiring board 1 required manual soldering.
The connection process becomes complicated, especially the coil 3 of the inductive element 3.
This work was extremely difficult when the wire diameter of b was as small as 0.061 cmφ to 0.1 mmφ.

For this reason, it has been difficult to automate the entire series of steps from attaching the inductive element 3 to connecting the coil terminal 4 and the wiring layer 1a of the wiring board 1.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an electric circuit component including an inductive element whose assembly process can be easily automated.

The present invention will be specifically explained below with reference to Examples.

FIG. 2 is an exploded perspective view showing one embodiment of the device of the present invention.

This device is composed of a wiring board 1 made of a ceramic board, a printed wiring board, or the like, and an inductive element 3.

The induction element 3 includes a thrust body 3a having a drum-shaped core, a coil 3b wound around the core, a pre-soldered coil end 4, and a pair formed on both end surfaces of the thrust body 3a so as to be parallel to each other. It has V-shaped grooves 3c, 3c, and a part of each groove 3c is baked with conductive paste.
Alternatively, a thin film-like conductive layer 5 formed by adhering metal foil or the like is provided.

Then, the pre-soldered coil terminal 4 is attached to the cut groove 3.
c is bent at the entrance of the groove 3c, and extends to a position where it comes into contact with the conductive layer 5 so as to crawl along the deepest bottom part of the V-shaped groove 3c.

On the other hand, the wiring board 1 has a cut groove 3c of the inductive element 3.
A notch 2 is provided with a pair of opposite sides 2a, 2a of a size that can be inserted into the interior, and the sides of the opposite sides are printed or vapor-deposited so as to extend to the end. Wiring layers 1a and Ia formed by the above extend.

Here, the width of each V-shaped cut groove 3c is formed to be wider than the thickness of the wiring board 1 near the surface, and the width of the groove 3c is wider than the thickness of the wiring board 1 near the bottom.
This prevents the wiring board 1 from coming into contact with the coil terminal 4 placed in the cut groove 3c during assembly, which will be described later.

To assemble such a device, the induction element 3 is inserted and fixed with the side of the cut groove 3c from which the coil terminal 4 is pulled out facing the cutout 2 of the wiring board 1.

In this case, the cut groove 3c provided on the end face of the inductive element 3 is
Because of the shape, when inserting the inductive element 3 into the notch 2 of the wiring board 1, a gap is created between the opposite side 2a of the notch 20 and the notch 3c, as shown in FIG. 4, for example. Since the coil terminal 4 extends into the gap, there is no possibility that the coil terminal 4 will be pulled in the direction of the insertion force and break when inserted.

By immersing the thus assembled device in a solder bath (not shown) with the inductive element 3 portion facing down, for example, the conductive layer 5 and the wiring layer 1a are brought into contact with each other as shown in FIG. Solder 6 is applied to the part (solder dip).

In this case, since the solder also flows into the gap formed by the opposing side 2a of the notch 2 of the wiring board 1 and the V-shaped cut groove 3c, the coil terminal 4 is also soldered at the same time, and each part The electrical connection will be ensured.

The present invention is not limited to the embodiments described above, and various modifications are possible.

For example, the shape of the groove 3c of the induction element 3 is not limited to a V-shape, but may be a U-shape, or as shown in FIG. It may also be formed so that it can be placed thereon so as to have the same function.

Further, in the embodiment described above, the conductive layer 5 formed within the kerf 3c was provided in two parts of the kerf 3c, but it may be provided over the entire surface of the kerf 3c.

Further, in the above embodiment, a drum-shaped core is used as the thrust body 3a, but the invention is not limited to this. For example, as shown in FIG. You may also use one formed by

If such an inductive element 3 is used, the above-mentioned Hirata surface 3d
Since it can be used for positioning when inserting into the notch 2 of the board 1 or when pulling out the coil terminal 4, the assembly work can be further facilitated.

Further, in the embodiment, the notch 2 of the wiring board 1 is located on the opposite side 2a.
, 2a are not processed, but they may be processed to form an arcuate portion R&, as shown in FIG. 1, for example.

In this way, the induction element 3 can be inserted more easily, and an accident of disconnection of the coil terminal 4 during insertion can be more reliably prevented.

According to the device of the present invention described in detail above, the inductive element can be easily inserted and fixed into the notch of the wiring board with the coil terminal placed on the conductive layer, so that the connection process between the wiring layer and the coil terminal can be easily performed. In some cases, manual soldering is no longer necessary, and
Since the width of the kerf of the induction element is formed so as to become narrower toward the bottom, it is possible to reliably prevent an accident of disconnection of the coil terminal during assembly work.

Therefore, it is possible to provide an electric circuit component that is suitable for automation of assembly work and includes an inductive element that can improve reliability.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view showing an example of the conventional device, Fig. 2 is an exploded perspective view showing an embodiment of the device of the present invention, Fig. 3 is a perspective view showing its assembled state, and Fig. 4 is an exploded perspective view showing an example of the device of the present invention. FIG. 5 is a front view showing the relationship between the wiring board and the inductive element in another embodiment of the present invention, and FIG. 6 is a front view showing the relationship between the wiring board and the inductive element in another embodiment of the present invention. FIG. 1 is a perspective view showing another embodiment of the shape of the inductive element used in the device. FIG. 1 is a perspective view showing another embodiment of the wiring board used in the device of the present invention.

Claims (2)

[Scope of utility model registration request] (1) A coil is wound around a drum-shaped thrust body with grooves formed on both end faces, and a coil terminal is drawn out from the coil, and a pair of coils are inserted into which the grooves of the induction element are inserted. In a circuit or component comprising a wiring board having a notch with opposing sides and a wiring layer formed near the notch to be electrically connected to the coil terminal, the notch of the wiring board is opposite to the notch of the wiring board. A wiring layer is formed extending on the side, and the cut groove of the inductive element is formed so that the width of the groove becomes narrower toward the bottom, and a conductive layer is formed in the cut groove, and An electric circuit component including an inductive element, characterized in that a pre-soldered coil terminal is placed on a layer. (2) An electric circuit component including an inductive element according to claim 1, wherein a flat portion for positioning is formed on a part of the circumferential side of the drum-shaped thruster.