JP2000031618A - Method of mounting components to circuit board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of mounting components to a circuit board where the appropriateness in assembly improved. SOLUTION: A chip component 13 is fixed onto a wiring pattern 12 through spot welding. A mounting hole 15 to insert the connector terminal 14a of an electrical component 14 is made in a printed board 11. A connection board, which consists of a metallic thin plate and is equipped with supporting pieces 21 and 23 elastically in contact with the periphery of the connector terminal 14a, is mounted in the mounting hole 15. Inserting the connector terminal 14a into the mounting hole 15 will catch the connector terminal 14a between the supporting pieces 21 and 23, thereby fixing the electric part 14 onto the printed board 11 even without application of soldering. By making the method of fixing a connection plate 20 onto the wiring pattern 12 the same as the fixing method for the chip component 13, the mounting of the connection plate 20 can be performed at the same time within the mounting process of the chip component 13. Moreover, by arranging the electrical component 14 and the chip component 13 on the same side of the printed board 11, the necessity for turning the printed board 11 over during the setup as in a conventional circuit board is eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for mounting an electric component on a printed circuit board.

[0002]

2. Description of the Related Art A circuit board incorporated in various devices is configured by attaching chip parts and electric parts to a printed board on which a wiring pattern is formed. Generally, chip components are directly mounted on a wiring pattern by spot welding. On the other hand, the electric components are arranged on the surface side different from the mounting surface of the chip components, and the connection terminals provided to be protruded are inserted into the mounting holes formed on the wiring pattern and soldered to perform printing on the printed circuit board. Fixed to

[0003]

However, as described above, since the mounting method of the chip component and the electrical component on the printed circuit board is different, the assembling process of the circuit board using both of them requires the mounting process of the chip component. And the step of mounting the electrical parts must be provided separately. Moreover, in order to mount the chip component and the electric component on different surfaces of the printed circuit board, after mounting one component on the printed circuit board, the printed circuit board must be turned over and the other component must be mounted. For this reason, the conventional circuit board requires many steps for its assembly, resulting in an increase in manufacturing cost.

The present invention has been made in view of the above circumstances, and has as its object to provide a method for mounting components on a circuit board with improved assembling suitability.

[0005]

In order to achieve the above object, the present invention forms a mounting hole for inserting a connection terminal of an electric component on a printed circuit board, and forms a metal mounting hole in the mounting hole. A connection plate made of a thin plate and having a plurality of support pieces elastically contacting at least from two opposing directions on a peripheral surface of the connection terminal is attached by contacting the connection portion of the electric component on the wiring pattern, and the connection terminal is attached. It is inserted into a mounting hole and is sandwiched between a plurality of support pieces. In addition,
When the chip component is fixed on the wiring pattern by spot welding or soldering, the connection plate is preferably fixed on the wiring pattern by the same method as the chip component. At this time, the electric components are preferably arranged on the side of the printed circuit board on which the chip components are mounted.

[0006]

FIG. 1 shows a circuit board embodying the present invention. The circuit board 10 is a printed circuit board 1
1 is formed by forming various control circuits. A wiring pattern 12 is formed on one surface of the printed circuit board 11, and a chip component 13,
For example, a large number of electric components 14 such as transformers and capacitors are mounted.

The chip component 13 is directly mounted on the wiring pattern 12 by spot welding. Electric parts 1
4 is provided with a rod-shaped connection terminal 14a, and the connection terminal 14a is connected to the wiring pattern 12. The printed circuit board 11 includes electric components 14 on the wiring pattern 12.
A mounting hole 15 for inserting the connection terminal 14a is formed at the connection position of. A connection plate 2 for connecting the connection terminal 14 a and the wiring pattern 12 is provided in the mounting hole 15.
0 is attached.

As shown in FIG. 2, the connection plate 20 is made of a thin metal plate, and has four support pieces 21, 22, 23, 24 extending in the direction facing each other at the center thereof. ing. The support pieces 21 to 24 are connected to the roots 21b and 22.
b, 23b, 24b, the printed circuit board 11 of the connection board 20
Is slightly bent and raised toward the contact surface 20a. In addition, the support pieces 21 to 24 are connected to the tip portions 21a and 22.
a, 23a, and 24a are formed by the electric component 1
4 are not larger than the diameter of the connection terminal 14a.

The connection plate 20 is positioned with the support pieces 21 to 24 inserted into the mounting holes 15 and spot-welded on the wiring pattern 12. In this embodiment, as shown in FIG. 3, spot welding is performed on four welding portions P1 to P4 defined on the connection plate 20.

The connection terminal 14a of the electric component 14 is provided with a mounting hole 15 so as to push the four support pieces 21 to 24 apart.
And the tip portions 21a-2 of the support pieces 21-24.
4a pinches it from the circumferential direction. The connection terminal 14a and the wiring pattern 12 are connected via a connection plate 20.

In the process of assembling the circuit board 10, first, the printed board 11 is positioned with the surface on which the wiring pattern 12 is formed facing upward. And mounting hole 1
The connection plate 20 is placed on the wiring pattern 5, subjected to spot welding, and fixed on the wiring pattern 12 surrounding the mounting hole 15.
Subsequently, the chip component 13 is placed at a predetermined position on the wiring pattern 12 and fixed by spot welding.

Here, since both the connection plate 20 and the chip component 13 are fixed on the printed circuit board 11 by spot welding, the connection plate 20 can be mounted in the same process as the chip component 13, There is no need to provide a mounting step.

When the connection plate 20 and the chip component 13 have been mounted, the electric component 14 is mounted.
The connection terminal 14 a of the electric component 14 is inserted into the mounting hole 15 from the mounting surface side of the connection plate 20 and the chip component 13. As the connection terminal 14a is pushed in, the four support pieces 21 to 24 that narrow the mounting hole 15 are pushed out by the peripheral surface of the connection terminal 14a. At this time, the root portions 21b to 24b of the support pieces 21 to 24 are
Since the support pieces 21 to 24 are bent in the insertion direction of the connection terminal 4a, the support pieces 21 to 24 are necessarily bent at the roots 21b to 24b by the pressing of the connection terminal 14a. Therefore, the bending positions and bending directions of the support pieces 21 to 24 are constant, and the insertion of the connection terminal 14a can be performed stably.

When the connection terminal 14a is inserted into the mounting hole 15, the distal ends 21a to 24a of the support pieces 21 to 24 are connected to the connection terminal 14a by the bending elasticity of the roots 21b to 24b.
Elastically contact the peripheral surface of Thereby, the connection terminal 14
a is sandwiched between the support pieces 21 to 24, and the electric component 14 is positioned and held on the printed circuit board 11.

According to the circuit board 10 having the above-described configuration, all of the connection plate 20, the chip components 13, and the electrical components 14 mounted on the printed board 11 are arranged on the same surface side of the printed board 11. It is not necessary to turn the printed board 11 over during the assembly of the board 10. Also,
Since the electric component 14 is fixed on the printed circuit board 11 only by inserting the connection terminal 14a into the mounting hole 15, it is necessary to perform soldering between the connection terminal and the wiring pattern like a conventional circuit board. Disappears. By these,
The number of circuit board assembling steps is reduced, so that the manufacturing cost can be reduced and the assembling efficiency is improved.

In the above embodiment, an example in which the chip component is fixed on the wiring pattern by spot welding has been described. However, the chip component may be fixed by soldering. In this case, if the connection plate is also fixed by soldering, it becomes possible to mount the chip component and the connection plate in the same step as in the above embodiment.

Further, the number of support pieces provided on the connection plate is not limited to four, and it is sufficient that the support piece can be elastically contacted with the peripheral surface of the rod-shaped connection terminal and can be sandwiched. .

In the above embodiment, the chip components and the electric components are arranged on the same surface of the printed circuit board. However, they may be arranged on different surfaces of the printed circuit board. In this case, since the connection terminal of the electric component is inserted into the mounting hole from a side different from the mounting surface of the connection plate, a load is applied to the connection plate in a direction away from the printed circuit board by pushing the connection terminal. . Therefore, fix the connection board to the printed circuit board with sufficient strength, or press the connection board toward the printed circuit board side when inserting the connection terminals to prevent the connection board from falling off the printed circuit board. It is desirable to prevent it.

If the chip parts and the electric parts are arranged on different surfaces of the printed circuit board, a step of turning the printed circuit board over must be provided during the assembly step of the circuit board. Since it is not necessary to perform the process, the number of processes is reduced as compared with the conventional process of assembling a circuit board, and the appropriateness of assembly is improved.

[0020]

As described above, according to the component mounting method of the present invention, a mounting hole for inserting a connection terminal of an electric component is formed on a printed circuit board, and the mounting hole is formed by a thin metal plate. A connection plate having a plurality of support pieces elastically contacting at least from two opposite directions is attached to the peripheral surface of the connection terminal by contacting the connection portion of the electric component on the wiring pattern, and the connection terminal is provided with a mounting hole. To be held between the plurality of support pieces, the connection terminals and the wiring pattern are connected by simply inserting the connection terminals into the mounting holes, and the electric components are fixed on the printed circuit board. Therefore, it is not necessary to perform soldering between the connection terminal and the wiring pattern unlike the conventional circuit board, so that the soldering step can be omitted from the circuit board assembling step, and the process is simplified. At the same time, assembly efficiency is improved.

In a circuit board for fixing a chip component on a wiring pattern, the method for fixing the connection plate to the printed circuit board is the same as that for the chip component. And there is no need to add a dedicated mounting process.

Further, by mounting the electric component and the chip component on the same surface of the printed circuit board, it is not necessary to turn the printed circuit board upside down during the assembly as in a conventional circuit board, and the number of assembly steps is further increased. Be reduced.

【The invention's effect】 [Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part showing a component mounting portion of a circuit board embodying the present invention.

FIG. 2 is a schematic diagram showing a configuration of a mounting portion of the electric component shown in FIG.

FIG. 3 is an explanatory view showing a welded portion of the connection plate shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Circuit board 11 Printed board 12 Wiring pattern 13 Chip component 14 Electrical component 14a Connection terminal 15 Mounting hole 20 Connection plate 21-24 Supporting piece

Claims (3)

[Claims] 1. A component mounting method for a circuit board, comprising mounting an electric component on a printed board on which a wiring pattern is formed, wherein a mounting hole for inserting a connection terminal of the electric component is formed in the printed board. In addition, a connection plate made of a thin metal plate and having a plurality of support pieces elastically contacting at least in two opposing directions on the peripheral surface of the connection terminal is connected to the electric component on the wiring pattern. A method for mounting components on a circuit board, comprising the steps of: contacting a mounting portion of a circuit board; 2. A chip component is fixed on the wiring pattern by spot welding or soldering, and the connection plate is fixed on the wiring pattern by the same method as the chip component. The method for mounting components on a circuit board according to claim 1. 3. The component mounting method according to claim 2, wherein the electric component is disposed on a mounting surface side of the printed circuit board on which the chip component is mounted.