JPH0740532B2 - Coil parts - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil component used in various electronic devices.

2. Description of the Related Art Conventionally, as a typical example of this type of composite component, there is a delay line used for delaying signals in computer equipment, OA (office automation) equipment and the like.

As shown in FIG. 5, this delay line has a circuit configuration in which a plurality of coils L are connected between an input end and an output end, and capacitors C are arranged between the coils L and ground. There is.

Conventionally, when such a delay line is constructed, the sixth
The structure shown in FIG. 7 and FIG. 7 was adopted.

The delay line shown in FIG. 6 includes a coil 1 and a drum core.
It is constructed by winding a wire on 1a, and a plurality of the coils 1 are arranged side by side on the surface of a circuit board 2 on which a wiring portion having a predetermined circuit pattern is formed. Further, a rectangular chip capacitor 3 connected to the coil 1 by a wiring portion is arranged on the back surface of the circuit board 2. Further, external lead terminals 4 are attached to both edges of the circuit board 2 in the width direction at regular intervals, and the external lead terminals 4 are attached.
The tip end portion 4a of the coil 1 is connected to the tip end portion 4a of the external lead terminal 4 by winding and soldering.

Further, the delay line having another structure shown in FIG. 7 has a plurality of coils 6 formed by winding the winding wire dividedly on a bobbin 6a having a plurality of winding grooves. In this delay line, the coil 6 and the chip capacitor 3 are arranged on the surface of the circuit board 2, but the other structure is almost the same as the delay line shown in FIG.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above configuration, when the coils 1 and 6 are soldered to a printed circuit board or the like, the flux rises along the lead terminals 4 and adheres to the coils 1 and 6 to It had a problem that the characteristics of 1 and 6 changed.

The present invention solves such conventional problems, and an object of the present invention is to prevent flux from rising when soldering to a printed circuit board or the like.

Means for Solving the Problems In order to solve this problem, the present invention provides a winding groove formed by a plurality of collars provided with windings and a lead terminal to which an end of the winding is connected. A coil body in which a plurality of coils are arranged on a bobbin provided on the flange, a case in which the coil body is housed, an opening of the case is closed, and an external lead terminal of the coil body projects through. A bottom plate provided with a through hole, and a recessed portion continuous in the lengthwise direction is provided in the central portion where the through hole on the outer surface side of this bottom plate is provided, and the position close to the through hole on the case side of this bottom plate The groove is continuous in the lengthwise direction.

Operation With this structure, the raised portions are provided at both end portions in the lengthwise direction on the outer surface side of the bottom plate, and the recessed portion continuous in the lengthwise direction is provided at the central portion where the through hole is provided. When mounting on a substrate, etc., even if the bottom plate is inserted into the printed circuit board so that it abuts, the parts of the lead terminals that project through the bottom plate do not come into close contact with the bottom plate and the printed circuit board. A space is formed in the space to prevent the flux from rising along the lead terminals. In addition, even if the flux rises, the concave groove that is continuously provided in the length direction at a position close to the through hole inside the bottom plate causes the flux to flow into the concave groove, and thus the flux is applied to the lead terminal. It is possible to prevent it from going up further along.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings of FIGS.

1 to 4 show a delay line according to an embodiment of a coil component of the present invention. In the drawings, 10 is a coil main body, and this coil main body 10 has a plurality of flanges 11a and a plurality of winding grooves. Bobbin 11 made of insulating resin 11b
Each winding groove 11b is wound to form a plurality of coils 12. Each of the collars 11a of the bobbin 11 of the coil body 10 is provided with an accommodating portion 11c into which the chip capacitor 13 can be inserted, and the bottom corners of the collar 11a are wound in the winding grooves 11b. A cutout 11d is provided to transfer the wire between the winding grooves 11b. Further, on the collar 11a of the bobbin 11, a part of the lead terminals 14 and 15 is exposed in the accommodating portion 11c and arranged by insert molding so as to be connectable to the electrodes at both ends of the chip capacitor 13. Of the lead terminals 14 and 15, the lead terminal 14 is bent into a crank shape in the bobbin 11 so that the connecting portion with the external circuit is located at the substantially central portion in the width direction of the bobbin 11. The terminal 15 is cut at the portion exposed from the bobbin 11 on the side of the connection with the external circuit. Figure 2,
FIG. 3 is a diagram showing a state before cutting. This lead terminal
15 may be pulled out as it is without cutting. In this case, the state shown in FIGS. 2 and 3 may be used as it is. Reference numeral 16 denotes a rectangular tubular case made of an insulating resin in which the coil body 10 is housed and having an open bottom. A part of the lead terminal 14 of the coil body 10 projects from an opening at the bottom of the case 16.

Reference numeral 17 denotes a bottom plate that closes the opening of the case 16. The bottom plate 17 is provided with a plurality of through holes 17a through which the lead terminals 14 project as shown in FIGS. Projecting portions 17b that engage with engaging holes (not shown) provided on the inner surface of the opening edge of the case 16 are provided on both end faces of the.
Further, on the outer surface side of the bottom plate 17, raised portions 17c are provided at both end portions in the length direction, and a recessed portion 17d continuous in the length direction is provided at the central portion where the through hole 17a is provided.
Is provided. Therefore, when mounting the delay line of this embodiment on a printed circuit board, etc., the bottom plate
Bottom plate of the lead terminal 14 even if it is inserted so that the 17 contacts
The bottom plate 17 and the printed circuit board do not come into close contact with the portion projecting through from the bottom 17, and a space is formed between the printed circuit board and the bottom plate. Further, inside the case 16 of the bottom plate 17, projections 17e engageable with notches provided on the collar 11a of the bobbin 11 of the coil body 10 at both ends in the length direction.
And a groove 17f continuous in the length direction is juxtaposed in the through hole 17a at a position close to the through hole 17a.

Here, in the present embodiment, the coil body 10 is housed in the case 16 and the opening is closed by the bottom plate 17, but before the bottom plate 17 closes the opening, an insulating resin is provided in the case 16. You may make it inject. Further, it goes without saying that the present invention can be applied to a composite component using a coil other than the delay line.

EFFECTS OF THE INVENTION As described above, according to the present invention, since the recessed portion which is continuous in the length direction is provided on the outer surface side of the bottom plate, a space is formed between the bottom plate and the printed substrate when it is inserted into the printed circuit board. Therefore, it is possible to reliably prevent the flux from rising, and even if the flux rises on the bottom plate, it will flow into the continuous groove provided in the position close to the through hole of the lead terminal, The reliability is improved without going up along the lead terminals, and its practical effect is great.

[Brief description of drawings]

FIG. 1 is a perspective view showing a delay line according to an embodiment of the present invention with a part thereof cut away, FIGS. 2 and 3 are perspective views and side views showing coil components of the delay line, and FIG.
b is a perspective view of the bottom plate of the same delay line as seen from the outside and the inside of the case, FIG. 5 is a circuit diagram of a general delay line, and FIG. 6 is a perspective view showing a main part of a conventional delay line. FIG. 6 is a perspective view showing a main part of another conventional delay line. 10 …… Coil body, 11 …… Bobbin, 11a …… Tsuba, 11b ……
Winding groove, 11d …… Notch, 12 …… Coil, 13 …… Chip capacitor, 14,15 …… Lead terminal, 16 …… Case, 17
... bottom plate, 17a ... through hole, 17d ... recess, 17e ... protrusion, 17f ... recess groove.

Front page continuation (72) Inventor Toshihiro Yoshizawa 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP 59-161009 (JP, A) Actual development Sho 58-95033 (JP, U) Actually open 51-78949 (JP, U) Actually open 52-58928 (JP, U) Actually open 51-86535 (JP, U)

Claims (1)

[Claims] 1. A winding groove formed by a plurality of collars on which windings are provided and lead terminals to which terminals of the windings are connected, and a plurality of coils are arranged on a bobbin provided with the collars. An outer surface of the bottom plate, a coil body, a case in which the coil body is housed, and a bottom plate that closes an opening of the case and has a through hole through which a lead terminal of the coil body projects. Side through-hole is provided in the central portion with a continuous recess in the lengthwise direction, and a recessed groove continuous in the lengthwise direction is aligned with the through-hole at a position close to the through-hole on the case side of the bottom plate. Installed coil parts.