JP5135645B2 - Electronic component mounting structure - Google Patents

Description

  The present invention relates to a structure for attaching an electronic component to a printed circuit board.

  In audio equipment such as amplifiers, electronic components such as power transistors are attached to the end of the printed circuit board by soldering so that the power transistor body is parallel to the printed circuit board, and a heat sink is coupled to the power transistor. Is adopted. When the power transistor is soldered to the printed circuit board, the pin header is coupled with the conductor pattern of the printed circuit board so that the terminal of the power transistor is brought into contact with the pin header and soldered to the pin header. However, according to this mounting structure, since it is necessary to prepare a pin header, there exists a problem that cost starts. Furthermore, since it is necessary to manually couple the pin header to the printed board, there is a problem that the number of assembling steps increases.

  Patent Document 1 below describes a mounting structure in which a lead wire and a jumper wire of an electronic component are connected to each other on a printed circuit board and then soldered. However, this document does not describe a structure for attaching an electronic component to a printed board at the end of the printed board.

Japanese Utility Model Publication No. 3-51869 Japanese Utility Model Publication No. 6-17270 JP-A-2005-150498

  An object of the present invention is to provide a component mounting structure in which an electronic component is attached to an end portion of a printed circuit board via a jumper wire.

  A component mounting structure according to a preferred embodiment of the present invention is a component mounting structure in which an electronic component is attached to an end portion of a printed circuit board via a jumper wire, and the printed circuit board has a notch formed at the end portion. A through-hole is formed at a position facing the notch, and the jumper wire has a straight portion, a first bent portion that is bent at a substantially right angle from one end of the straight portion, and the other end of the straight portion. A second bent portion bent at a substantially right angle from the first bent portion, the first bent portion being inserted into the through hole, and the second bent portion being inserted into the notched portion. A wire is attached to the end of the printed circuit board, a terminal of the electronic component is inserted into the notch, contacts the jumper wire, and the terminal of the electronic component and the jumper wire are soldered.

  The first bent portion of the jumper wire is inserted into the through hole, and the second bent portion of the jumper wire is inserted into the cutout portion, so that the jumper wire can be attached to the end portion of the printed board. The terminal of the electronic component and the jumper wire are soldered in a state where the terminal of the electronic component is inserted into the notch and is in contact with the jumper wire. Thereby, an electronic component can be attached to the end portion of the printed circuit board via the jumper wire. By forming the notch at the end of the printed circuit board, positioning at the time of insertion of the jumper wire or electronic component can be facilitated, and these can be firmly attached.

  In a preferred embodiment, the first bent portion and the second bent portion are inserted with the first bent portion inserted into the through hole and the second bent portion inserted into the notch. The jumper wire is attached to the end portion of the printed circuit board by bending the portions inward so that the tips thereof face each other.

  Since the first bent portion and the second bent portion are bent inward so that the tips thereof face each other, the jumper wire can be firmly attached to the printed board. Further, it is not necessary to solder the jumper wire to the printed board. Further, the portion bent inside the first bent portion and the second bent portion comes into contact with the conductor pattern of the printed circuit board, so that the jumper wire and the conductor pattern can be conducted very well. .

  In a preferred embodiment, the printed circuit board has two through holes formed at positions facing the one notch, and two jumper wires are attached to the one notch, The terminal of the electronic component is in contact with the jumper wire while being sandwiched between the two jumper wires in the notch.

  In this case, even when the terminal of the electronic component is thick, the electronic component terminal and the jumper wire can be firmly brought into contact with each other by being sandwiched between the two jumper wires, and can be soldered stably.

  In a preferred embodiment, the terminal of the electronic component extends in parallel from the electronic component body to the electronic component body, and extends from the parallel part at a right angle to the electronic component body. And the second parallel part extending in parallel to the electronic component main body from the orthogonal part, and the orthogonal part is formed by the second bent parts of the two jumper wires. The terminal of the electronic component is in contact with the jumper wire in a state where the second parallel portion is sandwiched between the straight portions of the two jumper wires.

  In this case, when the electronic component body is attached to the end of the printed circuit board so as to be parallel to the printed circuit board via a jumper wire, the electronic component terminal and the jumper line are firmly in contact and soldered stably. Can do.

  It is possible to provide a component mounting structure in which an electronic component is attached to the end portion of the printed circuit board via a jumper wire.

1 is a perspective view showing a printed circuit board 10. 2 is a perspective view showing a state where a jumper wire 13 is attached to the printed circuit board 10. FIG. 2 is a perspective view showing a state where power transistors 20A and 20B are soldered to a jumper wire 13 of the printed circuit board 10. FIG. It is the figure which looked at the state which attached the two jumper wires 13 to the notch part 11A from the component mounting surface side. FIG. 4B is the figure which looked at the same state from the conductor pattern surface side. It is the figure which looked at the state which attached the two jumper wires 13 to the notch part 11A from the conductor pattern surface side. It is the figure which looked at the state which attached 20 A of power transistors from the component mounting surface side. FIG. 5B is a view of the same state as viewed from the conductor pattern surface side. It is the figure which looked at the state which attached 20 A of power transistors from the conductor pattern surface side. 3 is a diagram showing a state where a power transistor 20A is soldered to a jumper wire 13. FIG. It is the figure which looked at the state which attached the one jumper wire 13 to the notch part 11B from the component mounting surface side. FIG. 7B is a view of the same state as viewed from the conductor pattern surface side. It is the figure which looked at the state which attached the one jumper wire 13 to the notch part 11B from the conductor pattern surface side. It is the figure which looked at the state which attached power transistor 20B from the component mounting surface side. It is the figure which looked at the state which attached power transistor 20B from the conductor pattern surface side. It is a figure which shows the state which soldered the power transistor 20B to the jumper wire 13. FIG.

  Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings. However, the present invention is not limited to these embodiments. The component mounting structure of this embodiment includes a printed circuit board 10 and an electronic component (for example, a power transistor) 20, and the power transistor 20 is mounted to the end of the printed circuit board 10 via a jumper wire 13 by soldering.

[overall structure]
FIG. 1 is a perspective view showing the entire printed circuit board 10. One or a plurality of power transistors 20 are attached to the printed circuit board 10 by soldering via the jumper wires 13 at the end (upper end in the figure). At the end of the printed circuit board 10, notches 11 </ b> A and 11 </ b> B for inserting jumper wires 13 and power transistor 20 terminals are formed. The notch 11A is a part for attaching a relatively large power transistor 20, and the notch 11B is a part for attaching a relatively small power transistor 20. The notches 11A and 11B are formed in a substantially rectangular shape (a shape elongated in the vertical direction in the figure) when viewed in plan.

  Two through-holes 12A are formed for one notch 11A at a position on the printed circuit board 10 that faces each notch 11A. The two through holes 12A are formed side by side so as to be parallel to the short side of the notch 11A. Further, one through hole 12B is formed for one notch portion 11A at a position of the printed circuit board 10 facing each notch portion 11B. The through holes 12 </ b> A and 12 </ b> B are for inserting the jumper wire 13, and have a diameter that allows the jumper wire 13 to be inserted.

  FIG. 2 is a perspective view showing a state in which the jumper wire 13 is attached to the printed circuit board 10. In FIG. 2, the front side is a component mounting surface, and the back side is a surface on which a conductor pattern is formed.

  The jumper wire 13 has a substantially concave shape (a staple needle shape). That is, as shown in FIG. 4A, FIG. 4B, etc., the jumper wire 13 includes a straight portion 13a, a first bent portion 13b that is one end of the straight portion 13a and is bent at a substantially right angle from the straight portion 13a, and a straight portion 13a. And a second bent portion 13c that is bent at a substantially right angle from the straight line portion 13a (in the same direction as the first bent portion 13b).

  As for the jumper wire 13, the 1st bending part 13b is inserted in 12 A (or 12B) of through-holes, and the 2nd bending part 13c is inserted in the notch part 11A (or 11B). After the insertion, the first bent portion 13b and the second bent portion 13c are attached to the printed circuit board 10 by being bent inward. At least one of the first bent portion 13b and the second bent portion 13c is electrically connected (electrically connected) to the conductor pattern of the printed circuit board 10. Two jumper wires 13 are attached to the notch 11A. One jumper wire is attached to the notch 11B.

  FIG. 3 is a perspective view showing a state in which the power transistors 20 </ b> A and 20 </ b> B are soldered to the jumper wire 13 of the printed circuit board 10. The power transistors 20A and 20B have three terminals (electrodes) extending from the power transistor main body 21, as shown in FIGS. 5A, 5B, 8A, and 8B. Each of these terminals includes a parallel portion 22 extending in parallel from the power transistor main body 21 and an orthogonal portion 23 bent from the parallel portion 22 at a substantially right angle.

  In the power transistor 20A, the orthogonal part 23 of the terminal is inserted into the notch part 11A and contacts the second bent part 13c of the jumper wire 13, and solder 40 is applied to the contact part and soldered. . Further, in the power transistor 20B, the orthogonal part 23 of the terminal is inserted into the notch part 11B and comes into contact with the second bent part 13c of the jumper wire 13, and solder 40 is applied to the contact part. Is done.

  The power transistors 20A and 20B are attached to the jumper wire 13 so as to be parallel to the printed circuit board 10 and attached to the heat sink 30 with screws. Since the terminal of the power transistor 20 has the orthogonal portion 23, a space for moving air for heat dissipation can be formed between the heat sink 30 and the printed board 10.

Hereinafter, each of the notch 11A and the notch 11B will be described in detail with reference to enlarged views.
[Notch 11A (first embodiment)]
FIG. 4A is a view of a state in which two jumper wires 13 are attached to the notch portion 11A as viewed from the component mounting surface side. FIG. 4B is the figure which looked at the same state from the conductor pattern surface side. In the jumper wire 13, the first bent portion 13b is inserted into the through hole 12A from the component mounting surface side, and the second bent portion 13c is inserted into the notch portion 11A. One jumper wire 13 is attached to the left end of the notch 11A in the figure, and the other jumper wire 13 is attached to the right end of the notch 11A in the figure. Between the two jumper lines 13, the power transistor 20A A space into which the terminal is inserted is formed.

  As shown in FIG. 4B, after the first bent portion 13b and the second bent portion 13c of the jumper wire 13 are inserted into the printed circuit board 10, they are bent at a substantially right angle so that the tip portions thereof face each other. It is done. As a result, the jumper wire 13 is coupled to the printed board 10. That is, the jumper wire 13 does not need to be coupled to the printed board 10 by solder. At least one of the first bent portion 13b and the second bent portion 13c (specifically, the portion bent inward) of the jumper wire 13 is in contact with the conductor pattern of the printed circuit board 10 and is conductive. The jumper wire 13 can be automatically attached to the printed circuit board 10 by using a self-inserting machine, not by an operator's manual work.

  FIG. 5A is a view of a state in which the power transistor 20A is attached as viewed from the component mounting surface side. FIG. 5B is a view of the same state as viewed from the conductor pattern surface side. Each terminal of the power transistor 20 </ b> A moves away from the main body 21 at a substantially right angle from the orthogonal portion 23, a parallel portion 22 extending in parallel from the power transistor main body 21, an orthogonal portion 23 bent from the parallel portion 22 at a substantially right angle. 2nd parallel part 24 bent in the direction (opposite direction). That is, the parallel part 22 and the second parallel part 24 extend in parallel to the power transistor main body 21, and the orthogonal part 23 extends at a right angle to the power transistor main body 21.

  In the power transistor 20A, the orthogonal part 23 and the second parallel part 24 of the terminal are inserted into the notch part 11A (that is, in the space formed between the two jumper lines 13), and the two jumper lines In contact with the jumper wire 13 while being sandwiched by 13. Specifically, the orthogonal portion 23 is in contact with the second bent portions 13c of the two jumper wires 13 while being sandwiched between the second bent portions 13c of the two jumper wires 13. The second parallel portion 24 is in contact with the straight portions 13 a of the two jumper wires 13 while being sandwiched between the straight portions 13 a of the two jumper wires 13.

  That is, the width (length in the horizontal direction) of the notch 11A is formed to be the same as or slightly larger than the sum of the widths of the second bent portions 13c and the orthogonal portions 23 of the two jumper wires 13. Has been.

  After the terminal of the power transistor 20A is brought into contact with the jumper wire 13, as shown in FIG. 6, solder 40 is applied to the contact portion between the terminal of the power transistor 20A and the jumper wire 13 and soldered. Specifically, the contact portion between the second parallel portion 24 and each straight portion 13a of the two jumper wires 13 (to the printed circuit board 10) is soldered by applying solder 40 from the component mounting surface side. . Or you may solder by apply | coating the solder 40 to the contact part of the orthogonal part 23 and each 2nd bending part 13c of the two jumper wires 13, and (the printed circuit board 10). As described above, each terminal of the power transistor 20 is attached to the end portion of the printed circuit board 10 through the jumper wire 13 and can be electrically connected to the conductor pattern of the printed circuit board 10 through the jumper wire 13.

  In this embodiment, each terminal of the power transistor 20 may not have the second parallel portion 24 as in the second embodiment described later. This embodiment can be suitably used for a relatively large power transistor having a thick terminal. This is because the terminal can be firmly brought into contact with the jumper wire 13 by sandwiching the thick terminal between the two jumper wires.

[Notch 11B (Second Embodiment)]
FIG. 7A is a view of a state in which one jumper wire 13 is attached to the notch portion 11B as viewed from the component mounting surface side. FIG. 7B is a view of the same state as viewed from the conductor pattern surface side. As for the jumper wire 13, the 1st bending part 13b is inserted in the through-hole 12B from the component mounting surface side, and the 2nd bending part 13c is inserted in the notch part 11B. As shown in FIG. 7B, after the first bent portion 13b and the second bent portion 13c of the jumper wire 13 are inserted into the printed circuit board 10, they are bent inward at a substantially right angle so that their tips face each other. As a result, the jumper wire 13 can be coupled to the printed board 10. That is, the jumper wire 13 does not need to be soldered to the printed circuit board 10. At least one of the first bent portion 13b and the second bent portion 13c (specifically, the portion bent inward) of the jumper wire 13 is in contact with the conductive pattern of the printed board 10 and is conductive. The jumper wire 13 can be automatically attached to the printed circuit board 10 by using a self-inserting machine, not by an operator's manual work.

  FIG. 8A is a view of a state where the power transistor 20B is attached as viewed from the component mounting surface side. FIG. 8B is the figure which looked at the same state from the conductor pattern surface side. Each terminal of the power transistor 20B includes a parallel part 22 extending in parallel from the power transistor main body 21 and an orthogonal part 23 bent from the parallel part 22 at a substantially right angle.

  In the power transistor 20B, the orthogonal part 23 of the terminal is inserted into the notch part 11B and is in contact with the second bent part 13c of the jumper wire 13. In detail, the orthogonal part 23 contacts so that the 2nd bending part 13c may be covered from the upper side. Since the width (length in the horizontal direction in the drawing) of the notch portion 11B is slightly larger than the width of the orthogonal portion 23 of the terminal, the orthogonal portion 23 is substantially sandwiched between the notch portions 11B. It has become. Although not particularly limited, the tip of the orthogonal part 23 is in contact with the printed circuit board 10 so as to protrude somewhat.

  After the terminal of the power transistor 20B is brought into contact with the jumper wire 13, as shown in FIG. 9, the solder 40 is applied to the contact portion between the terminal of the power transistor 20B and the jumper wire 13 and soldered. Specifically, soldering is performed by applying solder 40 around the contact portion between the orthogonal portion 23 and the jumper wire 13 (the straight portion 13a and the second bent portion 13b). As described above, each terminal of the power transistor 20 </ b> B can be attached to the printed circuit board 10 through the jumper wire 13 and can be electrically connected to the pattern of the printed circuit board 10 through the jumper wire 13.

  In this embodiment, each terminal of the power transistor 20B may have the second parallel portion 24 as in the first embodiment. This embodiment can be suitably used for a power transistor having a relatively small size and a thin terminal.

  As described above, according to the present embodiment, the first bent portion 13b of the jumper wire 13 is inserted into the through holes 12A and 12B, and the second bent portion 13c of the jumper wire 13 is inserted into the cutout portion 11. Thus, the jumper wire 13 can be attached to the end portion of the printed circuit board 10. With the terminals of the power transistors 20A and 20B inserted into the notches 11A and 11B and in contact with the jumper wire 13, the terminals of the power transistors 20A and 20B and the jumper wire 13 are soldered. As a result, the power transistors 20 </ b> A and 20 </ b> B can be attached to the end portion of the printed circuit board 10 via the jumper wires 13.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment. The electronic component is not limited to a power transistor, and an electronic component such as an arbitrary transistor, a semiconductor element such as a diode, or a capacitor is employed.

  The present invention can be suitably employed in a component mounting structure for audio equipment such as an amplifier.

DESCRIPTION OF SYMBOLS 10 Printed circuit board 11A Notch part 11B Notch part 12A Through-hole 12B Through-hole 13 Jumper wire 13a Straight line part 13b 1st bending part 13c 2nd bending part 20 Power transistor 21 Power transistor main body 22 Parallel part 23 Orthogonal part 24 Second 2 parallel parts 30 heat sink

Claims (4)

A component mounting structure for attaching an electronic component to the end of a printed circuit board via a jumper wire,
The printed circuit board has a notch formed at an end, and a through hole is formed at a position facing the notch,
The jumper wire includes a straight portion, a first bent portion that is bent at a substantially right angle from one end of the straight portion, and a second bent portion that is bent at a substantially right angle from the other end of the straight portion,
The jumper wire is attached to the end of the printed circuit board by inserting the first bent portion into the through-hole and inserting the second bent portion into the notch,
A component mounting structure in which a terminal of the electronic component is inserted into the notch, contacts the jumper wire, and the terminal of the electronic component and the jumper wire are soldered.   In a state where the first bent portion is inserted into the through hole and the second bent portion is inserted into the notch portion, the first bent portion and the second bent portion are respectively tips. The component mounting structure according to claim 1, wherein the jumper wire is attached to an end portion of the printed circuit board by being bent inward so as to face each other. The printed circuit board has two through holes formed at positions facing the one notch,
Two jumper wires are attached to one notch,
The component mounting structure according to claim 1 or 2, wherein a terminal of the electronic component is in contact with the jumper wire in a state of being sandwiched by the two jumper wires in the notch. A terminal of the electronic component, a parallel portion extending in parallel to the electronic component main body from the electronic component main body, an orthogonal portion extending perpendicularly from the parallel portion to the electronic component main body, A second parallel part extending in parallel to the electronic component body from the orthogonal part,
In the state where the orthogonal portion is sandwiched between the second bent portions of the two jumper wires, and the second parallel portion is sandwiched between the straight portions of the two jumper wires. The component mounting structure according to claim 3, wherein a terminal of the component contacts the jumper wire.

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