JPH02150093A - Method of mounting stud type two-pole component on printed circuit board - Google Patents

Abstract

PURPOSE:To eliminate leads, to largely shorten a working time and to improve operability by connecting first and second electrodes to the wiring pattern of a printed circuit board with a terminal member previously determined in its shape. CONSTITUTION:A stud type diode 12 is attached to a heat sink member 4 secured to a printed wiring board 2 by screws 6, and mounted with a first terminal member 32. The protrusion 34 of a second terminal member 34 is inserted into the through hole of the board 2, the rear end side of the member 34 is bent to be engaged with a second electrode 18, and the member 34 is temporarily secured. Since the member 34 is not completely secured in advance to the electrode 18, the protrusion 34a can be easily inserted into the through hole. Thus, the board 2 can be, for example, dipped at the protruding side of the protrusions 32a, 34a in a melted solder layer thereby to solder the protrusions 32a, 34a simultaneously upon other soldering. Eventually, the bent part of the member 34 is soldered to the electrode 18 to complete mounting of the diode 12.

Description

[Detailed Description of the Invention] Summary Regarding a method for mounting a stud-type two-electrode component onto a printed wiring board, for the purpose of improving workability, a stud-type two-electrode component having first and second electrodes is mounted on a printed wiring board. In the mounting method, a first terminal member is fixed to a first electrode, a plurality of protrusions protruding from the first terminal member are inserted into through holes of a printed wiring board, and a plurality of protrusions protruding from a second terminal member are inserted into the printed wiring board. After inserting the second terminal member into the through hole, bending the rear end side of the second terminal member and locking it to the second electrode, and soldering the protrusions of the first and second terminal members to the wiring pattern of the printed wiring board, The bent portion on the rear end side of the second terminal member is configured to be soldered to the second electrode.

INDUSTRIAL APPLICATION FIELD The present invention relates to a method for mounting a stud type two-electrode component onto a printed wiring board.

A stud-type two-electrode component used when constructing a high-power circuit such as a power supply circuit is configured with two electrodes fixed to the main body in order to make electrical connections with other components. A typical example is a static diode. This kind of stud-type two-electrode component usually
Wiring is performed using lead wires for devices attached to device casings, etc., but when providing a small power supply device, for example, it becomes necessary to mount the stud type two-electrode component on a printed wiring board. Therefore, there is a demand for a method for easily mounting a stud-type two-electrode component, which does not originally have a structure suitable for mounting on a printed wiring board, on a printed wiring board.

BACKGROUND OF THE INVENTION FIG. 4 is a diagram for explaining a conventional method of mounting a stud-type two-electrode component onto a printed wiring board.

2 is a printed wiring board; 4 is a heat dissipation member fixed to the printed wiring board 2 with screws 6; 8 is a heat dissipation plate fixed to the heat dissipation member 4 with screws 10;
2 is attached to the heat radiating member 4. In the stat type diode 12, 14 is a main body portion, and 16 is a main body portion 14.
The first electrode 18 protruding from the main body 14 is a second electrode protruding from the main body 14 in the opposite direction to the first electrode 16 . When attaching the stud type diode 12 to the heat dissipation member 4,
The main body 14 is pressed against the heat radiating member 4 through the insulating sheet 20 so that the first electrode 16 passes through the hole 4a formed in the heat radiating member 4, and the insulating pusher 522, the terminal 24 and the washer 26 are attached to the first electrode 16. They were attached in this order and tightened with a nut 28 to the first electrode 16 on which a thread (not shown) was formed. Further, when wiring the stud type diode 12 attached to the heat dissipation member 4 in this way, the lead wire 30 is wrapped around the first electrode 16 and the second electrode 18, and the other end of this lead wire 30 is connected to the printed wiring. The lead wire 30 is inserted into the through hole of the board 2, and the lead wire 30, the first electrode 16 and the second electrode 18, and the lead wire 30 and a wiring pattern formed on, for example, the back side of the printed wiring board 2 are soldered by hand. That's what I was doing.

Problems to be Solved by the Invention In the conventional mounting method explained with reference to FIG. 4, a plurality of lead wires are used for each of the first and second electrodes in order to allow large power, and Since each lead wire has a relatively large wire diameter, it is difficult to work when inserting the lead wire into the through hole, and it takes a long time for mounting.

The present invention was created in view of the above circumstances, and its purpose is to improve workability when mounting a stud type two-electrode component on a printed wiring board.

Means for Solving the Problems The above-mentioned technical problems are solved by mounting a stud-type two-electrode component having first and second electrodes on a printed wiring board in the following procedure.

First, a first terminal member is fixed to a first electrode, and a plurality of protrusions projecting from the first terminal member are inserted into through holes of a printed wiring board.

Next, a plurality of protrusions protruding from the second terminal member are inserted into the through holes of the printed wiring board, and the rear end side of the second terminal member is bent and locked to the second electrode.

Then, the protrusions of the first and second terminal members are soldered to the wiring pattern of the printed wiring board.

Finally, the bent portion on the rear end side of the second terminal member is soldered to the second electrode.

Function: In the mounting method of the present invention, a terminal member with a plurality of protruding protrusions is used, because if there is only one protrusion for inserting into a through hole of a predetermined diameter and performing soldering, a large amount of electric power is required. This is because it cannot be tolerated. As described above, according to the present invention, since the first and second electrodes are connected to the wiring pattern of the printed wiring board using terminal members having a predetermined shape, wiring can be performed using lead wires. Workability is improved compared to the conventional method. In addition, in the method of the present invention, the second terminal member is soldered to the second electrode after the protrusions of the first and second terminal members are soldered to the wiring pattern. If you try to solder the second terminal member to the second electrode before soldering the protrusion of the second terminal member to the wiring pattern, the second terminal member and the second electrode This is because it is necessary to determine the position of the protrusion with high precision when soldering with the protrusion, which makes the work complicated.

Example Embodiments of the present invention will be described below based on the drawings.

Fig. 1 is an embodiment of the present invention, in which Fig. 1(a) is a partial cross-sectional side view showing a state in which a static diode is mounted on a printed wiring board, Fig. 1(b) is a front view thereof, and Fig. (C
) is a partially cutaway top view of the same, and the heat dissipation plate is not shown in the same figure (C). In addition, the fourth example showing the conventional example
Substantially the same members as those in the figures are given the same reference numerals, and some explanations thereof will be omitted. This embodiment is structurally different from the conventional example in that the first electrode 16 and the wiring pattern of the printed wiring board 2 are connected by the first terminal member 32, and the connection between the second electrode 18 and the printed wiring board 2 is This is because the connection to the wiring pattern is made by the second terminal member 34.

As shown in FIG. 2(a), the first terminal member 32 has four terminals at its tip for insertion into a through hole of a printed wiring board.
It has a shape in which two protrusions 32a protrude, and a hole 32 on the rear end side for fixing to the first electrode 16 with a nut 26.
b is formed.

On the other hand, the second terminal member 34, as shown in FIG.
A protrusion 3 on the tip side for insertion into the through hole
4a has a protruding shape, and an oblong hole 34 is provided in the band-shaped portion on the rear end side to facilitate bending on the rear end side.
b is formed.

In this embodiment, the first terminal member 32 and the second terminal member 34 each have a plurality of protrusions 3 on their distal ends.
2a and 34a are formed by the protrusion 32a or 34.
This is because if a is one, the protrusion must be made thicker in order to tolerate a large amount of power, and the diameter of the through hole must also be made larger accordingly, making it impossible to apply general-purpose through hole forming technology. .

Next, the steps of the mounting method in this embodiment will be explained with reference to FIG. First, as shown in FIG. 2(a), the stud type diode 12 is attached to the heat dissipation member 4 fixed to the printed wiring board 2 with screws 6, and the first terminal member 3 is attached.
Attach 2. That is, the main body part through the insulating sheet 20!
4 against the heat dissipation member 4, the insulating bushing 22 is mounted on the first electrode 16, and the first terminal member 32 is mounted on the insulating bushing 22 so that the protrusion 32a is inserted into the through hole of the printed wiring board 2, The stud type diode 12 is attached to the heat dissipating member 4 by tightening the insulating bushing 22 and the first terminal member 32 with the nut 28 through the washer 26. Next, as shown in FIG. 3B, the protrusion 34a of the second terminal member 34 is inserted into the through hole of the printed wiring board 2, and the rear end side of the second terminal member 34 is bent to engage the second electrode 18. the second terminal member 3
Perform temporary fixation in step 4. In this case, since the second terminal member 34 is not completely fixed to the second electrode I8 in advance, the protrusion 34a
can be easily inserted into the through hole. The printed wiring board 2, to which the first terminal member 32 is attached and the second terminal member 34 is temporarily fixed, has projections 32a, 34a.
By dipping the protruding side into a molten solder layer, for example, the protrusions 32, a, 34a can be soldered at the same time as other electronic components. Finally, the bent portion of the second terminal member 34 is soldered to the second electrode 18, thereby completing the mounting of the stud type diode 12.

According to this embodiment, electrical connections are made for each electrode using the fixed-shaped first terminal member 32 and second terminal member 34, so when wiring is performed using lead wires as in the conventional case, Workability is improved compared to Further, regarding soldering between the protrusions of the first terminal member 32 and the second terminal member 34 and the wiring pattern of the printed wiring board 2, similar to the soldering of other electronic components that do not have lead wires,
An automatic soldering device using a molten solder layer or the like can be applied. Moreover, since the first terminal member and the second terminal member have a shape with a plurality of protrusions protruding from them, the diameter of the through hole can be made larger than the diameter of the through hole of other electronic components, making it possible to use a high power stat. type diode implementation can be performed.

Effects of the Invention As detailed above, according to the present invention, lead wires are not required when mounting a stud-type two-electrode component on a printed wiring board, so the work time is significantly shortened and work efficiency is improved. This has the effect of making it possible to

[Brief explanation of the drawing]

Fig. 1 is an embodiment of the present invention, in which Fig. 1(a) is a partial cross-sectional side view showing a state in which a static diode is mounted on a printed wiring board, Fig. 1(b) is a front view thereof, and Fig. (C
) is a partially cutaway top view thereof, FIG. 2 is a front view of the first terminal member (a) and second terminal member (b) shown in FIG. 1, and FIG. FIG. 4 is an explanatory diagram of the prior art. 2... Printed wiring board, 12... Stat type diode, 16... First electrode, 18... Second electrode, 32
...first terminal member, 34...second terminal member.

Claims (1)

[Claims] In a method for mounting a stud-type two-electrode component having first and second electrodes (16, 18) on a printed wiring board, a first terminal member (32) is fixed to the first electrode (16). do,
A plurality of protrusions (32a) protrude from the first terminal member (32).
) into the through-hole of the printed wiring board (2), insert a plurality of protrusions (34a) protruding from the second terminal member (34) into the through-hole of the printed wiring board (2), and insert the second terminal member (34) into the through-hole of the printed wiring board (2). Bend the rear end side and attach the second electrode (18
) of the first and second terminal members (32, 34).
a, 34a) to the wiring pattern of the printed wiring board (2), and then the bent portion on the rear end side of the second terminal member (34) is soldered to the second electrode (18). A method for mounting a stud-type two-electrode component on a printed wiring board.