JPH0785464B2 - Manufacturing method of composite parts - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a method for manufacturing a composite component used for electronic circuits such as video tape recorders, radios, and radios.

[Technical Background of the Invention and Problems Thereof] Conventionally, circuit components such as an inductor, a transformer, a capacitor, and a resistor for mounting on a printed circuit board for an electronic circuit are individually manufactured, or, for example, an inductor and a capacitor. In many cases, a composite component having a structure in which two circuit components consisting of the above is simply housed in an outer casing made of a mold resin and a connecting lead wire is projected from the outer casing is manufactured.

However, in such a conventional circuit component or composite component, the mounting work on the printed circuit board is extremely complicated because of the presence of the lead wire, which is not preferable in terms of surface mounting technology on the printed circuit board, and the conventional circuit component or composite component as described above is used. In general, the composite parts had large shapes and were inconvenient in terms of handling.

[Object of the Invention] The present invention has been made in view of the above circumstances, and it is possible to integrate a plurality of circuit components into a leadless type with a small overall shape, and further, to achieve a connection mode and therefore a function. It is an object of the present invention to provide a method for manufacturing a composite part, which can be arbitrarily modified and can obtain a product that can contribute to improvement of surface mounting technology.

[Outline of the Invention] The outline of the present invention is to face the center of each punched portion of a lead frame so as to face each other in accordance with the shape of the circuit component to be arranged, and the base side is more inward than the punched portion. A step of arranging a plurality of circuit parts on a plurality of sets of terminal members each having a connecting portion formed by punching at a position close to the position, and performing necessary wiring between each of the circuit parts and the terminal member. At least one of a step, a step of forming an exterior body made of a mold resin on the circuit component and a portion other than the base side of each of the terminal members, and a plurality of pairs of the terminal members facing each other exposed to the outside of the exterior body. And a step of cutting one pair of terminal members facing each other at a position where the connecting portion is left and bending the same to the outer wall surface of the exterior.

[Examples of the Invention] The manufacturing principle and examples of the composite component according to the method of the present invention will be described below with reference to the drawings.

1 and 2 (a), (b), and (c) show the manufacturing principle of the present invention. That is, considering a circuit in which an inductor L and a capacitor C are connected to each other as shown in FIG. 1, when this circuit is seen between terminals and between terminals as shown in FIG. As shown in FIG. 7A, the inductor L and the capacitor C are individually arranged in the circuit configuration.

Also, when viewed between the terminals shown in FIG. 1, FIG.
As shown in, the circuit configuration is such that the inductor L and the capacitor C are arranged in parallel.

Further, when viewed between the terminals shown in FIG. 1, FIG. 2 (c)
As shown in FIG. 5, the inductor L and the capacitor C are arranged in series to form a circuit configuration.

In this way, the inductor L and the capacitor C are used as circuit parts, and by changing the connection state of both, a composite part exhibiting different functions can be obtained. This is not limited to the case of the composite component including the inductor L and the capacitor C, and the same applies to various combinations such as a transformer and a capacitor, an inductor and a resistor, and a resistor and a capacitor.

Next, a first embodiment of a method of manufacturing a composite part based on the above manufacturing principle will be described with reference to FIGS.

First, the lead frame 5 having a shape as shown in FIG. 3 is formed by pressing a conductive strip-shaped plate member.

The lead frame 5 has first and second terminal members 7 and 11 located substantially in the center of the punched portion 6 in parallel positions. The first terminal member 7 is the third of the lead frame body.
The first B-shaped projecting pieces 8a, 8b extending from both upper and lower sides in the figure toward the center of the punched part 6, and the electrode connection integrally molded at the center of both projecting ends of both projecting pieces 8a, 8b Piece 9
a, 9b and supporting pieces 10a ₁ , 10a ₂ , 10b ₁ and 10b ₂ and, the electrode connection piece 9a, 9b, the supporting pieces 10a ₁ , 10b ₁ and the supporting piece 10a ₂ ,
10b ₂ face each other.

In addition, the second terminal member 11 includes second projecting pieces 12a and 12b arranged in parallel with the projecting pieces 8a and 8b and the second projecting piece 12
It consists of second electrode connecting pieces 13a, 13b formed at the protruding ends of a, 12b, respectively, and these both electrode connecting pieces 13a, 13b are formed to project in the length direction of the lead frame 5 as shown in FIG. Has been done.

In addition, the first and second projecting pieces 8a and 12a are the lead frame 5
In the base portion 14a of the
4b are linked together.

As is apparent from the drawings, this connecting portion has punched portions 6 on both sides.
It is punched at a position closer to the inside.

Next, with respect to the first and second terminal members 7 and 11 in the lead frame 5 having the above-described shape, FIG. 4 and FIG.
Bending as shown in (b) is performed.

That is, the protruding piece 8a of the first terminal member 7 is shown in FIG.
After being bent vertically upward along the line A ₁ , the electrode connecting piece 9a and the supporting pieces 10a ₁ and 10a ₂ are all bent horizontally along the line B ₁ .

Similarly, the protruding piece 8b is bent vertically upward along the line A ₂ shown in FIG. 3, and then the electrode connecting piece 9b and the supporting pieces 10b ₁ and 10b ₂ are put together.
B fold horizontally along line ₂ . Then, the horizontally arranged electrode connecting pieces 9a, 9b are curved so as to face each other.

As a result, as shown in FIG. 5 (a), the first terminal member 7 capable of supporting the circuit component is formed substantially at the center of the punched portion 6.
Can be formed.

Also, after bending the second protruding pieces 12a and 12b vertically upward along the lines C ₁ and C ₂ shown in FIG. 3, respectively, further bending them horizontally along the lines D ₁ and D _2. Then, both electrode connecting pieces 13a and 13b arranged horizontally are bent vertically upward.

As a result, the second terminal member 11 capable of supporting the circuit component is provided substantially at the center of the punched portion 6 as shown in FIG. 5 (b).
Can be formed.

Next, as shown in FIG. 6, the inductor 17 is placed on the first terminal member 7.

The inductor 17 is composed of a drum core 15 made of a magnetic material and a coil 16 wound around the drum core 15, and both flange portions 15a, 15 of the drum core 15 are provided.
The outer end surface of b is formed in a concave shape, and the connecting electrodes 18a and 18b are provided in the concave portions.

Then, the collar portion 15a is fixed by the both support pieces 10a ₁ and 10a _2.
10b ₁ and 10b ₂ respectively support the flange portions 15b to position the inductor 17 on the first terminal member 7, and the electrode connecting pieces 9a and 9b are brought into contact with the connecting electrodes 18a and 18b, respectively, and , The both ends of the coil 16 are connected to their respective contact parts by soldering or the like to these parts, and the coil 16 is electrically connected to both electrode connecting pieces 9a, 9b.

Further, as shown in FIG. 6, a capacitor 20 having electrodes 19a and 19b on both ends is placed on the second terminal member 11, and the electrodes 19a and 19b are connected to the electrode connecting pieces 13a and 13b. And electrically connect each by means such as soldering.

Next, with respect to the inductor 17 and the capacitor 20, which are respectively supported by the first and second terminal members 7 and 11 in this way,
As shown in FIG. 7, the outer casing 2 is formed by molding using a molding resin.

Furthermore, after completion of molding, I line and II shown in FIG.
The protruding pieces 8a, 12a and the protruding pieces 8b, 12b are cut along the line, respectively.

As a result, as shown in FIG.
It is possible to obtain the composite part 1 in which a, 12a and the protruding pieces 8b, 12b each partly protrudes outward, and these protruding pieces 8a, 12a,
By bending the projecting portions of the projecting pieces 8b and 12b along the wall surface of the exterior body 2, respectively, the composite component 1 having the appearance shown in FIG. 9 and having the circuit configuration as shown in FIG. Can be obtained.

The composite component 1 having the above configuration can be used as a composite component having an integrated structure in which the function of the inductor 17 and the function of the capacitor 20 are individually retained.

Since this composite component 1 is a leadless type, it is suitable for surface mounting on a printed circuit board.
Since the actual dimensions can be made small, for example, a width of 5 mm, a depth of 4 mm, and a height of 3 mm, the outer peripheral surface of the outer package 2 can be taping-wrapped and mounted on a printed circuit board using a mounter.

At this time, since the inductor 17 and the capacitor 20 can be mounted at the same time, the efficiency of the circuit component mounting process can be improved.

Next, a second embodiment of the present invention will be described.

This second embodiment is basically the same as the first embodiment, except that the cutting positions for the projecting pieces 8a, 12a, 8b, 12b after molding are changed in the first embodiment. Is different from

That is, after forming the exterior body 2 as shown in FIG.
The projecting pieces 8a, 12a are cut along the line III and the projecting pieces 8b, 12b are cut along the line IV to project from the exterior body 2.
The projecting end portions of the above are connected to the base portion 14a, and the projecting end portions of the projecting pieces 8b and 12b are connected to the base portion 14b. By undergoing such a cutting process, it has the appearance shown in FIG.
As shown in FIG. 13, a composite component 30 having a circuit configuration in which an inductor 17 and a capacitor 20 are connected in parallel can be manufactured.

The same operation as in the case of the first embodiment can be exerted also by the manufacturing method of such a composite component 30.

Next, a third embodiment of the present invention will be described.

The manufacturing method of this embodiment is basically the same as that of the first embodiment, but in this case as well, the cutting position for the protruding pieces 8a, 12a, 8b, 12b after molding may be changed. This is different from the case of the first embodiment.

That is, after forming the exterior body 2 as shown in FIG.
The projecting pieces 8a, 12a are cut along the I line, and the projecting pieces 8b, 12b are cut along the IV line to separate the projecting ends of the projecting pieces 8a, 12b projecting from the exterior body 2, and the projecting piece 8b. The projecting end portions of 12b are connected by a base portion 14b. By going through such a cutting process, it is possible to manufacture a composite component 40 having an appearance shown in FIG. 15 and having a circuit configuration in which an inductor 17 and a capacitor 20 are connected in series as shown in FIG. You can

The same operation as in the case of the first embodiment can be exerted also by the manufacturing method of such a composite component 40.

FIG. 17 and FIG. 18 show a fourth embodiment of the present invention. In the case of this manufacturing method, the primary winding 42 and the secondary winding 43 are wound around the drum core 15 instead of the inductor 17. The rotated transformer 41 is placed on the first terminal member 7,
One end of the primary winding 42 of the transformer 41 is provided with a protruding piece 8a.
, One end of the secondary winding 43 to the protruding piece 8b, the primary winding 42
The other ends of both the secondary windings 43 are commonly connected to the projecting piece 12a, and the cutting positions of the projecting pieces 8a, 12a and the projecting pieces 8b, 12b are the same as in the case of the first embodiment. That is.

As a result, the composite component 50 having the connection mode as shown in FIG. 18 can be obtained.

The same operation as in the case of the first embodiment can be exerted also by the manufacturing method of such a composite component 50.

The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the invention.For example, as a combination of each circuit component, in addition to those shown in each of the above-described embodiments, an inductor and Various combinations such as resistance element, capacitor and resistance element, transformer and resistance element are possible, and in these cases as well, by appropriately changing the wiring process and the cutting position of each protruding piece as in the case described above. Thus, it is possible to provide a composite part suitable for various uses.

[Effects of the Invention] According to the present invention described in detail above, a method for manufacturing a composite component, which is capable of manufacturing a plurality of circuit components in a small size and in a leadless type, and which can contribute to improvement of surface mounting technology for a printed circuit board, is provided. Can be provided. Also, the punching position of the connecting part of the terminal member is set to a position closer to the inner side than the positions of the other punching parts of the lead frame, and cutting at the position where this connecting part remains leaves the terminals of the circuit parts connected. ,
If you leave both connecting parts facing each other, it will be in a parallel connection state,
When only one is left and the other is cut off, a series connection state is established, so that it is possible to manufacture composite components in various connection states according to the type of circuit component and its application.

[Brief description of drawings]

FIG. 1 is an explanatory view showing the manufacturing principle of the present invention, and FIGS. 2 (a), (b), and (c) are equivalent circuits of composite parts having various circuit configurations obtained from the manufacturing principle shown in FIG. 1, respectively. 3 and 4 are plan views of a lead frame for forming various composite parts, FIG. 4 is a plan view showing a bent state of the first and second terminal members of the same, and FIG. 5 (a) is FIG. 5B is a side view showing the bent state of the above-mentioned first terminal member, FIG. 5B is a side view showing the bent state of the above-mentioned second terminal member, and FIG. FIG. 7 is a plan view showing a state of being placed and connected, FIG. 7 is a plan view showing a forming range of the outer package and cutting positions of the projecting pieces, and FIG. 8 is a plan view showing only a portion constituting a composite part. Figure shows the first of the present invention
FIG. 10 is a perspective view showing a composite component manufactured by the embodiment of FIG. 10, FIG. 10 is an equivalent circuit diagram of the same as above, and FIG. 11 is a plan view showing a cutting position of each projecting piece in the second embodiment of the present invention. Is the second
FIG. 13 is a perspective view of a composite part manufactured according to an embodiment, FIG. 13 is an equivalent circuit diagram of the same as above, FIG. 14 is a plan view showing a cutting position of each projecting piece in the third embodiment of the present invention, and FIG. FIG. 16 is a perspective view of a composite part manufactured by the third embodiment, FIG. 16 is an equivalent circuit diagram of the same as above, and FIG. 17 is a plan view showing a circuit part and a cutting position of each projecting piece in the fourth embodiment of the present invention. , FIG. 18 is an equivalent circuit diagram of the above. 1,30,40,50 ... Composite parts, 2 ... Exterior body, 5 ... Lead frame, 7 ... First terminal member, 11 ... Second terminal member, 8a, 8b, 12a, 12b ... … Projection piece, 17… Inductor, 20… Capacitor, 41… Transformer.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Internal reference number for FI Technical indication H01F 27/00 H01G 4/228 8123-5E H01F 15/00 D

Claims (5)

[Claims] 1. A lead frame is formed so as to face each other toward the center of each punched portion in accordance with the shape of a circuit component to be arranged, and the base side is closer to the inside than the punched portion. A step of disposing a plurality of circuit parts on a plurality of sets of terminal members each having a connecting portion formed by being pulled out, a step of performing required wiring between each of the circuit parts and the terminal member, and the circuit part And a step of forming an exterior body made of a mold resin in the portion excluding the base side of each of the terminal members, and at least one of the opposing pairs of the plurality of pairs of terminal members exposed to the outside of the exterior body. And a step of cutting the terminal member at a position where the connecting portion is left and bending the terminal member to the outer wall surface of the exterior. 2. The method of manufacturing a composite component according to claim 1, wherein the circuit component is a combination of an inductor and a capacitor. 3. The method of manufacturing a composite component according to claim 1, wherein the circuit component is a combination of a transformer and a capacitor. 4. The method of manufacturing a composite component according to claim 1, wherein the circuit component is a combination of an inductor and a resistor. 5. The method of manufacturing a composite component according to claim 1, wherein the circuit component is a combination of a capacitor and a resistor.