JPH0350799A - Mounting of electrical component onto wiring board - Google Patents

Abstract

PURPOSE:To dip the electrical part of a second kind with solder together with the electrical part of a first kind, and to prevent the possibility of the displacement of a second position by previously fixing the electrical part of the second kind to a chassis and installing the electrical part of the second kind to a wiring board together with the chassis. CONSTITUTION:The electrical parts 3, 4 of a first kind are mounted to a wiring board 1, and the leads of the electrical parts 3, 4 are inserted into the terminal inserting holes of the board. A chassis 2 to which the electrical parts 6-11 of a second kind are fixed is placed on the wiring board 1 to which the electrical parts of the first kind are mounted. Each terminal 6a-11a of the electrical parts 6-11 of the second kind is inserted into each terminal inserting hole 12-17 of the wiring board 1 at that time while each pawl section 19 is inserted into each notch 20 of the wiring board 1 or fitted to edge sections. Each pawl section 19 is bent to the inside, and the wiring board 1 is set up to the chassis 2. The wiring board 1 set up is moved forward onto the solder jet section of a solder tank as the rear of the wiring board 1 is brought to the state in which the rear is positioned to a lower section, and dipped with solder. Accordingly, assembly operation is simplified largely, and cost can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention relates to a method for mounting (mounting and soldering) electrical components on a wiring board during assembly of an audio device, etc.
In particular, the present invention relates to a method for attaching electrical components to a wiring board, which allows efficient soldering of electrical components fixed to a chassis by screws or the like to the wiring board without manual work.

[Prior Art 1] When assembling an in-vehicle audio device, leads of various electrical components are soldered and attached to the wiring pattern of a wiring board.

Some of these electrical components, such as resistors, capacitors, diodes, and transistors, are mounted on wiring boards (
The first type of electrical component is mounted (mounted), the lead of which is inserted into a terminal insertion hole and soldered to a conductor pattern; There is a second type of electrical component in which a terminal is inserted into a terminal insertion hole and soldered to a conductor pattern.

When assembling an audio device, etc., it is necessary to mount (mount and solder) both the first and second types of electrical components as described above to the wiring board, but conventionally this work was done as follows. It was carried out in a process.

(a) The first type of electrical component is mounted on the wiring board using an automatic machine, and the leads of the component are inserted into the terminal insertion holes.

(b) Masking the terminal insertion hole of the wiring board into which the lead of the second type of electrical component is to be inserted with tape or the like from the side where the conductor pattern is formed.

(cl) Advance the above-mentioned wiring board onto the solder jet part of the solder bath, and adhere and fix the solder to the land part of the conductor pattern and the lead of the first type of electrical component (hereinafter referred to as such automated soldering ( ``Solder dip (work)''
(d) Remove the tape and the like attached for masking in the step (b) above to the wiring board.

(el) Attach the above wiring board to the chassis, insert the terminal of the second type of electrical component such as the volume or connector that was previously attached to the chassis into the terminal insertion hole from which the mask has been removed, and connect this terminal and the conductor pattern. and are manually soldered.

Of the above steps, the step (b) is performed during soldering (step (C)) to the terminal into which the lead of the second type of electrical component is to be inserted in the later step (e). This is done to prevent the insertion hole from being blocked by solder. Also, regarding the above (el process), please refer to the second
The type of electrical components are also mounted on the wiring board in the step (a) above together with the first type of electrical components, and the first and second types of electrical components are
Another possible method is to solder-dip the types of electrical components together in the step (e) above. However, many of the second type of electrical components are relatively heavy, so if they are soldered together with the first type of electrical components, their positions may shift during soldering, resulting in the wiring board and the second type of electrical components being soldered together. When the second type of electrical component is installed on the chassis, installation distortion occurs, which places stress on the leads of the second type of electrical component and causes component damage. Therefore, the above method is not practical in practice. It was impossible to implement.

For this reason, the process (e) above, in which the leads of the second type of electrical components are manually soldered, has traditionally been indispensable6. In the conventional method of mounting electrical components onto a wiring board, especially in each of the above steps, the terminal insertion holes are masked with tape, etc. Since the step (e) of soldering is required, there are problems in that the number of man-hours required during assembly work is extremely large, resulting in poor work efficiency and high costs.

The present invention is intended to solve the above-mentioned problems, and provides an electrical component that can efficiently solder an electrical component fixed to a chassis with screws or the like to a wiring board without manual work. The purpose of the present invention is to provide a method for attaching the same to a wiring board.

[Means to solve the problem]

The present invention provides a first type of electrical component that is mounted on a wiring board and whose leads are soldered to a conductor pattern formed on the wiring board, and a first type of electrical component that is mounted on a wiring board and whose terminals are fixed to a chassis to which the wiring board is attached. This is a method for mounting a second type of electrical component to be soldered to a conductor pattern on a wiring board, and the method includes the steps listed below.

(a) mounting the first type of electrical component on the wiring board and inserting the lead of this electrical component into the terminal insertion hole of the wiring board; (b) mounting the first type of electrical component on the wiring board; a step of attaching a wiring board to the chassis and inserting a terminal of a second type of electrical component previously fixed to the chassis into a terminal insertion hole of the wiring board; (c) wiring in a state installed in the chassis; A board is supplied to a solder bath, and the leads of the first type of electrical component and the second type of electrical component are connected to each other.
[Operation] According to the above means, after the second type of electrical component is fixed to the chassis, Since the wiring board is attached to the chassis and the terminals of the second type of electrical components fixed to the chassis are inserted into the terminal insertion holes of the wiring board, the first and second types of electrical components are attached to the wiring board. This makes it possible to solder dip several electrical components together. Therefore, it is necessary to mask the terminal insertion holes of the wiring board through which the leads of the second type of electrical components are inserted, with tape or the like, which is required before and after the solder dip work in the conventional method of mounting electrical components onto the wiring board. The process of manually soldering the second type of electrical component can be reduced.

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

FIG. 1 is a diagram for explaining a method for attaching electrical components to a wiring board according to an embodiment of the present invention, and shows a printed circuit board, a chassis, and electrical components attached to these during assembly of an in-vehicle audio device. FIG.

In the drawing, reference numeral 1 indicates a wiring board having a conductive pattern formed on its back surface, and reference numeral 2 indicates a chassis to which this wiring board 1 is attached.

On the wiring board 1, first types of electrical components (such as disclute components) such as an AM/FM tuner unit 3 and a capacitor 4 are mounted such that their respective leads are inserted into the terminal insertion holes. There is. Mounting of this disclute component is performed by an automatic machine. In addition, a crack 5 is formed in this wiring board 1 along the line indicated by a dashed line α-α' in the figure, and the wiring board 1 is divided into a part shown by A and a part shown by B in the figure, with this crack 5 as a boundary. It can be divided into .

On the other hand, chassis 2 has various parts such as volume 6.7.8
And a second type of electrical components such as connectors 9, 10, 11 are fixed by screws or the like. These second type electrical components 6 to 11 have terminals 6a extending downward in the figure.
, 7a.

8a, 9a, 10a, and ILa are attached.

These bins 6a to lla are inserted into respective terminal insertion holes 12, 13, 14, 15.degree. 16.17 of the wiring board 1 when the wiring board 1 is attached to the chassis 2, respectively. Furthermore, claw portions 19 extending downward in the figure are integrally formed at six locations on the lower edge of the chassis 2. When the wiring board 1 is attached to the chassis 2, each of these claws 19 is inserted into the notches 20 formed at six locations on the outer periphery of the portion of the wiring board l shown by B in the figure, or This is for attaching the wiring board 1 to the chassis 2 so that the wiring board 1 will not come off from each other by being bent inward of the chassis 2 after the wiring board 1 is fitted onto the edge of the chassis 2 .

Next, the assembly work of each part of the vehicle-mounted audio device shown in FIG. 1 will be explained.

First, the first type of electrical components indicated by numerals 3 and 4 are mounted on the wiring board 1, and their leads are inserted into the terminal insertion holes of the board.
The chassis 2, which is fixed with screws or the like, is placed on the wiring board 1 on which the first type of electrical components are mounted.

At that time, each terminal 6a = 11a of the second type electrical components 6 to 11 fixed to the chassis 2 is inserted into each terminal insertion hole 12 to 17 of the wiring board 1, and each claw part 19 is inserted into each terminal insertion hole 12 to 17 of the wiring board 1. 1 or fit onto the edge of the wiring board 1. Then, each claw portion 19 is bent inward to attach the wiring board l to the chassis 2.

Next, with the wiring board 1 attached to the chassis 2 in this manner with its back side (the surface on which the conductor pattern is formed) facing downward (as shown in Figure 1), solder jets from a solder bath (not shown) As a result, each lead of both the first and second types of electrical components is soldered to each land of the conductor pattern of the wiring board 1, and is bent. Each claw portion 19 is attached to the wiring board 1.
It is designed to be fixed by soldering to the back side of the .

Particularly in this embodiment, two predetermined claws 19 out of six claws 19 are soldered to land portions of the ground pattern of the wiring board 1. In this case, since the terminals 6a to lla of the second type of electrical components 6 to 11 are inserted in advance into the respective terminal insertion holes 12 to 17 of the wiring board 1, these terminals are inserted before the solder dip process as in the conventional case. (2nd
There is no need to mask each terminal insertion hole with tape, etc. (through which the leads of the following types of electrical components should be inserted)
Furthermore, in this case, the second type of electrical components 6 to 11, which are relatively heavy, are mounted on the wiring board 1 together with the chassis while being fixed and supported by the chassis 2 in advance.
There is no fear that the position of the second type of electrical component will shift during soldering.

After the solder dip described above, the part of the wiring board 1 shown by A in the figure is separated from the part shown by B in the figure along the crack 5, and attached to the front part of the chassis 2 (the part shown by C in the figure) with screws or adhesive. The assembling work of the in-vehicle audio device, which includes the work of mounting (mounting and soldering) the first and second types of electrical components on the wiring board, is performed in a manner of 0 or more.

As described above, according to this embodiment, the chassis 2
Since the second type of electrical components 6 to 11 fixed to the chassis 2 are attached to the wiring board 1 together with the chassis 2, the first and second types of electrical components can be soldered together on the wiring board 1. I can do it. Therefore, the conventional process of masking the terminal insertion hole into which the terminal of the second type of electrical component is supposed to be inserted before the solder dipping process, or the process of manually inserting the second type of electrical component after the solder dipping process. Since the soldering process is no longer necessary, assembly work can be greatly simplified and costs can be reduced.

Although the embodiments of the present invention are applied to the work of mounting electrical components onto a wiring board during the assembly work of an in-vehicle audio device, the present invention is not limited to this and is applicable to all kinds of electrical parts. Of course, it can be applied to mounting on a wiring board.

[Effect of idea]

As described above, according to the present invention, the second type of electric component is fixed to the chassis in advance, and then the tube 2 type of electric component is attached to the wiring board together with the chassis. It becomes possible to solder dip two types of electrical components together with a first type of electrical component. Moreover, since the second type of electrical component is mounted on the wiring board while being fixed and supported by the chassis, there is no risk of the second position shifting during soldering. 2nd before and after the process
This eliminates the need for the process of masking the terminal insertion holes for the first type of electrical components and the process of manually soldering the second type of electrical components, greatly simplifying the assembly work and reducing costs. 6.

[Brief explanation of drawings]

FIG. 1 is a diagram for explaining a method for attaching electrical components to a wiring board according to an embodiment of the present invention, and shows a wiring board, a chassis, and electrical components attached to these during assembly of an in-vehicle audio device. FIG. 1... Wiring board, 2... Chassis, 3.4... First type of electrical component, 6.7, 8, 9.10.11...
- Second type of electrical components, 6a, 7a, 8a. 9a, 10a, lla... lead, 12.13°14
．． 15, 16, 17...Terminal insertion hole.

Claims (1)

[Claims] 1. A first type of electrical component is mounted on a distribution board and has its leads soldered to a conductive pattern formed on the wiring board, and a first type of electrical component is fixed to a chassis to which the wiring board is attached and whose terminals are soldered to a conductive pattern formed on the wiring board. A method for mounting an electrical component on a wiring board, the method comprising: a second type of electrical component to be soldered to a conductor pattern, the method comprising the steps listed below (a) on a wiring board; a step of mounting a first type of electrical component and inserting the lead of the electrical component into a terminal insertion hole of the wiring board; (b) moving the wiring board on which the first type of electrical component is mounted to the chassis; (c) supplying the wiring board attached to the chassis to the solder bath; and the lead of the first type of electrical component and the second type of electrical component.
A process of simultaneously soldering the terminals of the types of electrical components to the conductor pattern formed on the wiring board,