JP2553015Y2 - Composite parts - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a composite component such as an LC filter and a delay line.

[0002]

2. Description of the Related Art The structure of a composite component such as an LC filter or a delay line obtained by arranging circuit elements on a lead member made of a plate-like metal and connecting the circuit elements with the lead member is, for example, an actual one. It has been filed as Japanese Patent Application No. 1-149928. Since such a composite component does not use a substrate on which a conductor pattern for arranging circuit elements is formed, there is an advantage that the composite component can be made thinner by the thickness of the substrate.

Further, since the circuit elements can be connected on both sides of the lead member, the mounting density of the circuit elements is increased. Further, since the lead member can also be used as an external terminal, there is no need to use an external terminal separately, so that a planar spread can be achieved. It is possible to obtain a small and small composite part. This kind of composite part is
Since the substrate is not used, it is necessary to embed the entirety of the lead member in a resin except for the part to be the external terminal and to firmly solidify it, and it is difficult to adjust the characteristics of the completed composite component.

[0004] However, it often happens that the characteristics of the completed composite part need to be adjusted because of the deviation from the characteristics at the time of design. In particular, it is often necessary to adjust the inductance. Since the lead member is usually formed from a lead frame, the circuit element is arranged on the lead frame, the arranged portion is solidified with resin, sealed, and then cut from the lead frame to complete the composite component. Therefore,
It is not possible to measure and adjust the characteristics of the composite component connected to the lead frame before resin sealing.

[0005] Even if the lead frame is cut from the lead frame before resin sealing, it is not possible to measure the characteristics of the composite part having no supporting portion and having an unstable shape and to change the number of turns of a small coil to adjust the characteristics. Realistic. Since it is difficult to adjust the characteristics of the resin-encapsulated composite component, there is a disadvantage that the production yield is significantly reduced when the specifications of the characteristics are strict.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide a structure of a composite part whose characteristics can be adjusted after resin sealing.

[0007]

According to the present invention, a circuit element having a surface connection electrode including a high-frequency coil is arranged on a conductor extending in a plane, and a circuit is formed by connecting the electrodes of the circuit element with a conductor. In a composite component that is configured and resin-sealed as a whole with the external terminals exposed, the high-frequency coil is fixed to the conductor by arranging the center axis of the drum core so as to be perpendicular to the conductor. In the vicinity where the drum core is located, a recess extending in a direction perpendicular to and parallel to the center axis of the drum core is formed, and the recess is inserted with an inductance adjusting core that covers a part of the upper surface and side surfaces of the drum core. In addition, the direction perpendicular to the center axis of the drum core is formed larger than the inductance adjusting core. The recess into which the inductance adjusting core is inserted is covered with resin.

[0008]

FIG. 1 shows an embodiment of a composite part according to the present invention.
This will be described with reference to FIGS. 1 is a perspective view of the composite component of the present invention when the resin body is removed, FIG. 2 is a connection diagram between circuit elements of FIG. 1, FIG. 3 is a circuit diagram, and FIG. 4 is for explaining the composite component of the present invention. FIG. 5 is a cross-sectional view of FIG.
FIG. 6 is a perspective view showing a first embodiment of the present invention, and FIG.
FIG.

[0009] Composite parts of the embodiment constitutes a low-pass filter shown in the circuit diagram of FIG. 3, a high-frequency coil L _1, L ₂ is the inductance element connected in series, the coil L _1, and both ends of the coil L ₂ Capacitors C ₁ , C ₂ , and C ₃ are connected between the grounds. As shown in FIG. 1, the coils L ₁ and L ₂ are wound around a core 2 fixed on a base 1 made of an H-shaped ceramic material. At the four corners of the base 1, electrodes for surface connection are formed using a known technique such as printing and printing, and the leads 3 of the coil are connected. Chip type capacitors C ₁ , C ₂ ,
At both ends of the C ₃ also it is formed electrodes for surface connection.

[0010] The circuit elements each Yes disposed on both sides of the four lead member made of sheet metal, between the coils L ₁ is the lead member 4 and the lead member 5, the coil L ₂ is lead member 5 and the lead member 6 They are directly connected between them. This connection is performed by connecting the electrode of the base 1 to which the lead 3 is connected to each lead member on the front side. Across capacitor C ₁ is the lead member 4 and the lead member 7, the capacitor C ₂ is between the lead members 5 and the lead member 7, the capacitor C ₃ is back at the electrode surfaces of the lead members between the lead member 6 and the lead member 7 connected ing.

Each lead member has a role of a conductor for fixing a circuit element or connecting to each other. The lead member 4 is an input terminal 11 in FIG.
2. The lead member 6 also functions as the output terminal 13 and the lead member 7 also functions as the ground terminal 14. The lead member during manufacturing is
In the state of the lead frame 8 including the part shown by the one-dot chain line in FIG. 1, the solid line part is separated as a lead member after connecting circuit elements and sealing with resin.

[0012] The high-frequency coil _L 1 so as, _{L 2,} capacitors _{C 1,} C 2, _{C 3} present inventor the resin member 9 is buried, 4 and the radio-frequency coil as shown in FIG. 5 _{L 1} , a groove-like recess 20, 21 reaching the opposing sides of each resin body 9 on the upper side near the core 2 of L _2, the inductance by the position of the recess 21 by placing the rod-like core 22 into the recess 21 Was adjusted. The rod-shaped core 22 is fixed to the resin body 9 after adjusting the inductance. In this case, the inductance will be adjusted by changing only the magnetic path of the upper side of the core 2 of the high-frequency coil L ₂ by a rod-shaped core 22.

FIG. 5 shows only high-frequency coils L ₁ and L ₂ as circuit elements embedded in the resin body 9. In FIG. 4, reference numerals 41, 71, and 61 denote external terminals composed of lead members 4, 7, and 6, respectively. The lead member 5 serving as the relay terminal 12 is cut short and is in the resin body 9. In the inductance adjustment performed only by the movement of the rod-shaped core 22 in the direction perpendicular to the central axis of the core 2, the amount of change in the inductance may be small. Therefore, the present inventors devised a composite component having the following configuration. did.

FIGS. 6 and 7 are a perspective view and a sectional view showing a first embodiment of the composite part of the present invention. The same parts as those in FIGS. 1 to 5 are denoted by the same reference numerals. The resin body 9 in which the circuit elements arranged and connected as shown in FIG. 1 are buried has two concave portions 30 reaching the opposite sides of the resin body 9 near the upper side of the core 2 of the high-frequency coils L ₁ and L _2. Is formed. Further, a concave portion 31 which is continuous with the concave portion 30 and extends in the vertical direction is provided beside the core 2 of the high frequency coils L ₁ and L ₂ . An L-shaped core 35 is disposed in the continuous concave portions 30 and 31. In FIG. 6, one L-shaped core 35 is extracted and shown.

The composite part of the present invention thus formed is
The inductance is adjusted by moving the entire core 35 in the horizontal direction within a range in which one side of the L-shaped core 35 can move in the horizontal direction in the concave portion 31 extending in the vertical direction. Therefore, this inductance changes the magnetic path on the upper surface side of the core 2 by the portion located in the concave portion 30 of the core 35, and also changes the magnetic path on the side surface side of the core 2 by the distance between the core 2 and the portion located in the concave portion 31 of the core 35. Since the adjustment is performed by partially changing the magnetic path, the adjustment range (that is, the variable range) of the inductance can be wider than that of FIGS.

FIGS. 8 and 9 are a plan view and a sectional view showing a second embodiment of the composite part according to the present invention. FIG. 9 shows A-
It is A sectional drawing. Resin body 9, the recess 52 extending in the vertical direction are formed at both lateral positions of the core 2 of the high-frequency coil L _2, the upper side is provided with a horizontal recess 51 connecting the recess 52. The U-shaped core 5 is provided in the recess 51 and the recess 52.
0 is fitted, and the core 50 is moved horizontally within the width of the concave portion 52 to adjust the inductance. The width of the recess 52 in this embodiment, although are widely in the direction of the high-frequency coil L _1, it is clear that can be moved and wide in vertical and horizontal any direction. Thus-formed composite part, the core 50 is formed in a U-shaped, since the recess 51 and 52, such as described above in the vicinity of the core of the high-frequency coil L ₂ of the resin member 9 is formed, the recess of the core 50 The portion located at 51 covers the upper surface of the core 2, and the portions located at the two concave portions 52 cover the side surfaces of the core 2. Therefore, the core 2 of the high-frequency coil L ₂ is surrounded from three directions by the core 50, magnetic three directions of the core 2 path (i.e., the upper and side surfaces of the core 2 by the position of the recess 51 of the core 50 since by changing the road) inductance of the high-frequency coil L ₂ is adjusted, it can widen the variable range of the inductance.

Although the inductance adjusting core is fixed to the resin body 9, the inductance adjusting core may be covered with the resin again after the adjustment including the concave portion to protect the inductance adjusting core and to improve the appearance. . The magnetic body may be mixed in the resin body 9. The shape of the high-frequency coil is not limited to the embodiment, and various shapes can be used. For example, a synthetic resin base having a surface connection terminal protruding from the side surface may be fixed instead of a ceramic material.

Further, in the embodiment, the composite component in which the circuit elements including the high-frequency coil are connected by the lead member has been described. It goes without saying that the present invention can also be applied to a composite component in which the circuit elements are connected by a spread conductor pattern, and the external terminals are exposed and resin-sealed.

[0019]

[Effect of the invention] As described above, the composite part of the invention is
After the resin sealing, the inductance of the composite component can be adjusted. Therefore, even if the standard of the characteristics becomes strict, the production yield does not decrease. Adjustment of the inductance can be performed by arranging another core for inductance adjustment near the core around which the coil is wound, and adjusting the position of the core.

[Brief description of the drawings]

FIG. 1 is a perspective view of the inside of a resin body showing an embodiment of the composite part of the present invention.

FIG. 2 is a connection diagram of FIG.

FIG. 3 is a circuit diagram of FIG. 1;

FIG. 4 is a perspective view for explaining the composite part of the present invention.

FIG. 5 is a sectional view of FIG.

FIG. 6 is a perspective view showing a first embodiment of the composite part of the present invention.

FIG. 7 is a sectional view of FIG. 6;

FIG. 8 is a perspective view showing a second embodiment of the composite part of the present invention.

FIG. 9 is a sectional view taken along line AA of FIG. 9;

[Explanation of symbols]

2 core 4 lead member 5 lead member 6 lead member 7 lead member L ₂ high frequency coil 20 recess 22 core

Claims (3)

(57) [Scope of request for utility model registration] A circuit is formed by arranging a circuit element having a surface connection electrode including a high-frequency coil on a conductor that spreads two-dimensionally and connecting the electrodes of the circuit element with the conductor.
In the composite part in which the external terminals are exposed and the whole is resin-sealed, the high-frequency coil is located at the center of the drum core.
Position the axis perpendicular to the conductor and secure it to the conductor.
The drum core is connected to the vicinity of the resin body where the drum core is located.
The recesses extending in the direction perpendicular and parallel to the central axis of
The recess is formed and covers an upper surface and a part of a side surface of the drum core.
While inserting the core for adjusting the
The direction perpendicular to the central axis is from the inductance adjusting core.
A composite part characterized by being formed large . 2. A circuit element having a surface connection electrode including a high-frequency coil is arranged on a plurality of lead members made of a plate-like metal, and the electrodes of the circuit element are directly connected to the lead member so that the circuit elements are connected to each other. In a composite component which constitutes a circuit to be connected by a lead member and is entirely resin-sealed in a state where a lead member serving as an external terminal is exposed, a center axis of a drum core of the high-frequency coil is perpendicular to the lead member. And the drum core is fixedly connected to the lead member, and the drum core is located near the drum core of the resin body.
The recesses extending in the direction perpendicular and parallel to the central axis of
The recess is formed and covers an upper surface and a part of a side surface of the drum core.
While inserting the core for adjusting the
The direction perpendicular to the central axis is from the inductance adjusting core.
A composite part characterized by being formed large . 3. The method according to claim 1, wherein the inductance adjusting core is inserted.
The composite component according to claim 1 , wherein the recessed portion is covered with a resin .