JPS5948982A - Method of placing part on printed board - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to a method for mounting a component having a plurality of leads on a printed circuit board or the like.

(2) Background of the technology There is a method for increasing the functionality, scale, and density of electronic devices while ensuring reliability and maintainability of the devices by configuring circuits with components mounted on printed circuit boards. It has become common, and as the functions of devices have become more sophisticated, the number of parts installed has become more diverse, and the number of leads for external connections between individual parts has increased significantly as the hermeticity of each set has become more precise. In order to mount components on a printed circuit board, it is not at all easy to insert many small diameter leads into the through holes of the printed circuit board, and the leads may be bent and damaged, resulting in contact with the P-de. Effective measures such as preventing such accidents and shortening the insertion length were praised.

(3) Conventional technology <Ki Tonij III + J A Fig. 2 t, i Conventional print l-Printed base = l&
Figure 1 is a diagram for explaining the method of inserting the lead of a component to be mounted on the terminal surface of the component to be inserted.
Figures 1 and 2 show a top view, and Figures 1 and 2 show cross-sectional views of parts with leads inserted into the through holes of the printed circuit board.

In these figures, 1 is a component with multiple leads,
2 is a lead of the component 1, 3 is an insertion jig, 4 is an r printed board, and 5 is a through hole formed in the printed board 4, respectively.

The first number 81 shows the arrangement of the leads 2 of the product 1, in which a leads on the Y axis and b leads on the Y axis are arranged to protrude perpendicularly to the bottom surface of the part 1. In the part close to the bottom of component 1, the relative positional dimension of lead 2 is maintained accurately in the main body of component 1, but the relative positional dimension is not necessarily maintained accurately at the tip of lead 2. Therefore, since it is not possible to obtain a position corresponding to the through hole 5 of the printed circuit board 4 into which the lead 2 is to be inserted, The comb-shaped insertion jigs 31 and 32 along the direction of the part 1 are adjusted to the position of the total aXb of the Y-axis of the component 1 and the X-axis of the b-axis of the component 1. 5, the ends of the leads 2 of the component 1 are respectively inserted into the through holes 5 of the printed circuit board 4. Thereafter, the two comb-shaped insertion jigs 31 and 32 on the Y-axis and the Y-axis were removed, and the lead 2 of the component 1 was further inserted into the through hole 5 of the printed circuit board 4.

In the pasting insertion method, prior to inserting the leads 2 of the components 1 into the corresponding through holes 5 of the printed circuit board 4, a pair of comb-shaped insertion jigs 3 on the X and Y axes are inserted into each of the components 1. However, it is difficult to visually see the tip of the lead 2 when the insertion jig 3 is mounted, and it is difficult to visually align the lead 2 with the through hole 5 of the printed circuit board 4 into which the lead 2 is to be inserted. Also, when all the ends of the through-hole 5 lead 2 have been inserted, the insertion jig 3 of the X and Y axes must be removed from the lead 2, which is a cumbersome process. (4) Purpose of the Invention The present invention addresses the above-mentioned conventional drawbacks and requires that an insertion jig be attached to each component to correct the lead position of a component having multiple leads to be inserted into a through hole of a printed circuit board prior to insertion. The purpose is to provide a method for mounting parts that do not require

(5) Structure of the invention and its purpose is to insert a correction device having a funnel-shaped hole corresponding to each lead of the component in order to insert the leads of a component having multiple leads into corresponding through holes of a printed circuit board to be mounted. A board is attached in advance to the terminals of a plurality of leads of the component, and in this state, the tips of the leads are inserted into the corresponding through holes of the printed circuit board, and a solder connection is made without removing the correction board. This is achieved by providing a method for mounting parts that

(6) Examples of the invention Embodiments of the present invention will be described in detail below with reference to the drawings.

Figures 3 and 4gI are diagrams for explaining the method of inserting leads of components to be mounted on a printed circuit board into the through holes of the printed circuit board according to the present invention. FIG. 4 is a cross-sectional view of a component having a plurality of leads inserted using a correction plate, and FIG. 4 is a cross-sectional view of the correction plate.

In IMI, 11- is a component with multiple leads,
2 is a component lead, 4 is a printed circuit board, 5 is a through hole in the printed circuit board 4, 6 is a correction plate, 7 is a funnel-shaped concave hole in the correction plate, 8
indicate the central through hole, respectively.

Here, part 1 is the same as shown in Fig. 1, and a total of aXb leads are arranged on the Y axis of the bottom surface and b leads on the Y axis.
The lead spacing between each lead is 2.54 warn, and the leads have a cross section of 0.55++X0.55xi. Therefore, the correction plate 6 is made of a synthetic resin that is resistant to organic solvents and is chemically stable. , 5 mm thick flat plate, with a diameter on the Y-axis and b on the Y-axis, corresponding to the arrangement of leads 2 of component 1, a total of aXb, the top surface of which has a diameter of 2.5mm, a depth of about 1m+n, and an inclination angle. A lead insertion hole having a 45° funnel-shaped concave hole 7 and a central through hole 8 with a diameter Q of 5 mm is provided in the center thereof. The component 1 is supplied with the end portion of the lead 2 inserted into the correction plate 6 in advance.

As shown in FIG. 4, the funnel-shaped recessed hole 7 of the correction plate 6 is a funnel-shaped recessed hole with an elevation angle of 45° at the opening and the diameter equal to the arrangement interval of the reeds 2. Even if the lead 2 is misaligned, it is possible to guide the entire lead to the bottom of the funnel-shaped recessed hole without manually applying pressure to the positional deviation of the lead 2. : Insert the center hole 8KIE with a small diameter of 0.5 mm.

As a result, the tip of the lead 2 is approximately 5 mm from the bottom of the correction plate 6.
The part 1 that protrudes by about mm and is supplied with the correction plate 6 held at one node 2 is connected to the lead 2 with correction #i6 attached.
The terminal corresponds to the arrangement of the through holes 5 of the printed circuit board 4 and is responsible for highly accurate positioning.As shown in FIG. The lead 2 is inserted into the through hole 5 of the printed circuit board 4, and a normal soldering connection is made.At this time, the correction plate 6 remains stacked on the component 1 and the printed circuit board 4, but the correction plate 6 is 1.5 It is the thickness of a dragon, and there is no functional problem due to the extension of lead 2.
In addition, chemically stable synthetic resin is used for the material, and parts 1
Even if the correction plate 6 is left after mounting, there will be no effect due to chemical changes. (7) Effects of the Invention As explained in detail above, parts having several leads according to the present invention can be mounted through a printed circuit board. The method of inserting the lead into the hole does not require the complicated procedure of attaching an insertion jig each time before inserting the lead into the hole and removing the jig after insertion, and it is possible to insert the lead of the component into the hole of the printed circuit board. This method is extremely effective for automatically inserting parts with multiple leads into the openings of printed circuit boards.

[Brief explanation of drawings]

FIG. 1 is a plan view of a terminal surface of a mounted component, FIG. 2 is a sectional view of a conventional example, FIGS. 3 and 4 are an embodiment of the present invention, and FIG. Figure 4 shows a cross-sectional view. In the figures, 2 is a lead, 3 is an insertion jig, 5 is a through hole, 6 is a correction plate, and 7 is a funnel-shaped concave hole.

Claims (1)

[Claims] In order to insert the leads of a component having multiple leads into the corresponding through holes of the printed circuit board, a correction plate having a funnel-shaped hole corresponding to each lead of the component is attached in advance to the terminal of the lead of the component. A method for mounting components on a printed circuit board, characterized by inserting the tip of a lead into a through hole in the printed circuit board to make a solder connection.