JP2585160Y2 - Composite electronic components - 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 electronic component such as an LC filter or a delay line in which a circuit element is directly disposed on a lead member made of a sheet metal without using a circuit board.

[0002]

2. Description of the Related Art FIG. 6 is a top view of a conventional composite electronic component of this type in the process of being manufactured. FIG. 6 shows only capacitors as circuit elements. Lead frame 6
0 is a member piece 61 which will later become a lead member of the external terminal.
And a member 63 serving as a lead member of the common terminal is provided, and a plurality of chip capacitors 62 are connected between the member 61 and the member 63. After the circuit elements are arranged on such a lead frame 60 and connected, the portion surrounded by the dotted line 64 is sealed with resin. Then, the resin-sealed portion is cut from the lead frame 60 with the member piece 61 exposed.

When a circuit element is connected to each member of the lead frame 60 by soldering as described above, heat of solder is applied to each member and the circuit element. However, the coefficient of linear expansion of each of the member pieces and the circuit element is significantly different. For example, when the circuit element is the chip capacitor 62, the coefficient of linear expansion differs by one digit. Therefore, the member 61 and the chip capacitor 62 expanded by the heat of the solder contract when cooled, but the member 6
1 is particularly large. Then, the chip capacitor 62
In the case where both ends are connected to the member piece as described above, when the solder is cooled, the chip capacitor 62 is subjected to a pulling force in both end directions. The force remains as a stress in the cooled solder even after being cut from the lead frame 60, so that cracks easily occur in the solder with the passage of time, which often causes poor contact.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a composite electronic component which can prevent cracks from being generated in solder connecting a lead member and a chip capacitor.

[0005]

The composite electronic component of the present invention includes a lead member made of a plate-like metal arranged in a plane, the lead member being a first lead member serving as an external terminal, and a common terminal. A second lead member, and a third lead member formed integrally with the second lead member and serving as an external terminal. The first lead member extends in a direction intersecting the longitudinal direction of the elongated second lead member. The second lead member is separated from the second lead member, and the second lead member is provided with a slit extending in the longitudinal direction. At least a chip capacitor is connected between the first lead member and the second lead member. Yes,
It is characterized in that the entirety of the first lead member and the third lead member is resin-sealed in a state where the ends thereof are exposed.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a composite electronic component according to an embodiment of the present invention; FIG. FIG. 1 is a plan view showing the arrangement of circuit elements and lead members when the composite electronic component of the present invention is seen through, FIG. 2 is a cross-sectional view taken along line AB of FIG.
FIG. 4 is a plan view of a composite component in a state of a lead frame being manufactured, and FIG. 4 is a circuit diagram. The composite electronic component of the present invention constitutes a delay line as shown in the circuit diagram of FIG. 4, and includes five coils L1, L2, L3, L4, L5 and six capacitors C1, C2, C3, C4. , C5 and C6.
The coils L1 to L5 are connected in series between the input terminal 41 and the output terminal 42, and a tap 43 is provided at a connection point of each coil. Tap 43
One ends of the grounded capacitors C2 to C5 are connected. The terminals 41 and 42 are
Each is grounded via capacitors C1 and C6.
1 and 2, 10 is a main body, 11 is a first lead member serving as an external terminal, 12 is a second lead member serving as a common terminal, and 13 is a third lead member serving as an external terminal of the second lead member.
, 14 is a slit, 15 is a chip capacitor, and 16 is a bobbin for a multiple inductor. FIG. 1 shows a first lead member 11, a second lead member 12, and a third lead member 1 which are on the same plane to constitute this delay line.
3 shows circuit elements arranged and connected on the front surface and the back surface. A portion surrounded by a dotted line is a resin-sealed main body 10, and an elongated second lead member 1 serving as a common terminal in the center.
2 are buried. At both ends of the second lead member 12, a third lead member 13 serving as an external terminal of the lead member 12 is integrally formed, and is exposed from an opposite side surface. Further, the first lead member 11 serving as a plurality of external terminals is buried apart from the second lead member in a direction intersecting the longitudinal direction of the elongated second lead member 12, and the tip is exposed from the main body 10. I have. The second lead member 12 is provided with a slit 14 extending in the longitudinal direction. A chip capacitor 15 is connected between the first lead member 11 and the second lead member 12. Therefore, the chip capacitors 15 are connected to both sides of the second lead member 12. Further, between the first lead members 11, a coil divided and wound into a multiple inductor bobbin 16 is connected. As shown in FIG. 2, a multiple inductor bobbin 16 is disposed on the front surface of the lead member, and a chip capacitor 15 is disposed on the rear surface. Reference numeral 17 denotes a terminal of the bobbin 16 and the lead member 1
1 is fixed through the front and back. The coil is connected to the lead member 11 by the terminal 17.

FIG. 3 is a plan view of the composite electronic component in a state of a lead frame from which such a chip capacitor 15 and a coil 16 have been removed, and connections of circuit elements are indicated by electric symbols. The lead frame 30 includes a member piece 31 that will later become the first lead member 11 and a second lead member 1.
2 and a member 33 serving as the third lead member 13 are provided. The member 31 is provided apart from the member 32 in a direction crossing the longitudinal direction of the member 32. The slits 14 extending in the longitudinal direction are provided in the member piece 32 serving as the second lead member. In addition,
A member 33 serving as a third lead member is formed integrally with the member 32, and extends from both sides of the member 32 in a direction intersecting the longitudinal direction of the member 32. A capacitor C1 to a capacitor C6 is provided between the member pieces 31 and 32.
Are connected to each of the member pieces 31, and a coil tap or one side of the coil L1 and the coil L5 is connected. Then, a portion surrounded by a dotted line 34 is sealed with resin to form the main body 10,
With the member pieces 31 and 33 exposed, they are cut and separated from the lead frame 30. As a result, two circuits as shown in FIG. 4 are formed via the member 32 serving as the second lead member.

Each of the lead members has a role of fixing circuit elements and connecting them to each other. The first lead member 11 serving as an external terminal is connected to the input terminal 4 shown in FIG.
1, plays the role of the output terminal 42 and the tap 43, and the second lead member 12 plays the role of a ground terminal. Further, the third lead member 13 functions as an external terminal of the second lead member. The circuits shown in FIG. 4 are connected to both sides of the common electrode 12 to form individual circuits. However, if desired, the first lead member 11 corresponding to the output terminal 42 of the circuit formed on one side of the common electrode 12 and the first lead member 11 corresponding to the input terminal 41 on the other side.
By connecting the lead member 11 with a conductor, it can be used as one circuit. The composite component thus configured is provided with a slit 1 extending in the longitudinal direction of the member piece 32.
Since the slits 4 are provided, even if a pulling force is applied to both ends of the solder connecting the capacitor between the member pieces 32 and 31, the slit 14 spreads and absorbs the pulling force. Therefore, it is possible to prevent the occurrence of cracks or the like in the solder and the removal of the terminals of the chip capacitor with the passage of time.

FIG. 5 is a plan view of another embodiment of the composite electronic component of the present invention, showing the state of the lead frame. The lead frame 50 has a member piece 51 that will later be a first lead member and a member piece 52 that will be a second lead member.
And a member 53 serving as a third lead member.
The member 51 is a direction crossing the longitudinal direction of the member 52, and is provided on one side of the member 52 so as to be separated. Second
The member piece 52 serving as the lead member is provided with a slit 54 extending in the longitudinal direction. The member piece 53 serving as the third lead member is the member piece 52 serving as the second lead member.
Are formed integrally with each other, and extend to the side opposite to the member piece 51 in a direction intersecting with the longitudinal direction of the member piece 52. 56
Are member pieces for pulling out the member pieces 51 at both ends corresponding to the input terminal 41 and the output terminal 42 in FIG. Capacitors C1 to C6 are provided between the member pieces 51 and 52, and a coil L1 is provided between the member pieces 51.
To after connecting the L5, the part surrounded by a dotted line 55 is sealed with a resin. Then, with the resin-sealed portion exposing the member pieces 53 and 56, the lead frame 5
It is cut off from zero. In addition, the member piece 51 is resin-sealed.
Cut inside the sealed part, or expose from the resin-sealed part.
Can be presented. Each member piece fixes a circuit element while being separated from the lead frame 50,
Serves to interconnect. The member 52 serving as the second lead member serves as a common terminal, and the member 53 serving as the third lead member serves as an external terminal of the member 52.

Although the embodiment of the present invention has been described,
It is not limited to these embodiments. For example, not all the first lead members are necessarily exposed from the main body, and it is sufficient that at least the first lead members corresponding to the input terminal and the output terminal are exposed.

[0011]

As described above, in the composite electronic component of the present invention, the slit is provided in the second lead member buried in the main body and mainly serving as a common terminal as a ground terminal.
The slit deforms the second lead member so that no force is applied to the chip capacitor, so that no stress remains in the solder. Then, it is possible to prevent the occurrence of contact failure due to the peeling of the terminals of the chip component or the occurrence of cracks in the solder.

[Brief description of the drawings]

FIG. 1 is a plan view showing an arrangement of circuit elements and lead members when the composite electronic component of the present invention is seen through.

FIG. 2 is a sectional view taken along a line AB in FIG.

FIG. 3 is a plan view of the composite component in a state of a lead frame.

FIG. 4 is a circuit diagram of the composite electronic component of the present invention.

FIG. 5 is a plan view of another embodiment of the composite electronic component of the present invention.

FIG. 6 is a top view of a conventional composite electronic component in the process of being manufactured.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Main body 11 1st lead member 12 2nd lead member 13 3rd lead member 14 slit

Claims (1)

(57) [Scope of request for utility model registration] A first lead member serving as an external terminal; a second lead member serving as a common terminal; and a second lead. A third lead member integrally formed with the member and serving as an external terminal, wherein the first lead member is separated from the second lead member in a direction intersecting the longitudinal direction of the elongated second lead member; The lead member is provided with a slit extending in the longitudinal direction, at least a chip capacitor is connected between the first lead member and the second lead member, and the first lead member and the third lead A composite electronic component, wherein the whole is resin-sealed with the ends of the members exposed.