JP2000077834A - Printed-circuit board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the printed-circuit board, which can prevent the deviation of the mounting position without decreasing the soldering strength when a surface-mounting connector is soldered. SOLUTION: This printed-circuit board 10 is made to have the size, wherein the sufficient solder fillet H is formed around a strength reinforcing terminal 23 in a surface-mounting connector 20. At the same time, respective notches 13A and 13A are formed at facing edge parts 13s and 13s of the strength reinforcing terminal pattern 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a signal terminal pattern and a reinforcing terminal pattern corresponding to a signal terminal and a strength reinforcing terminal of a surface mounting connector. The present invention relates to a printed wiring board on which a surface mounting connector is mounted by soldering a signal terminal and a strength reinforcing terminal.

[0002]

2. Description of the Related Art For example, electronic devices such as mobile phones include:
As shown in FIGS. 10 and 11, a plurality of printed wiring boards B and C housed inside a casing A are connected to a connector (male connector) D provided on the printed wiring board B and a connector provided on the printed wiring board C. (Female connector) Some are connected to each other via E.

The above-mentioned connector (surface mounting connector) D
As shown in FIG. 12, contacts Db, Db... And signal terminals Dc, Dc... Are provided on a connector body (mold) Da, and a pair of reinforcements for improving the soldering strength to the printed wiring board B are provided. Terminal (nail) Dd, D
d is provided.

On the other hand, as shown in FIG. 13, signal wiring patterns Bc, Bc... Corresponding to the signal terminals Dc, Dc.
Corresponding to the reinforcing terminal patterns Bd, Bd.

The signal terminal patterns Bc, Bc...
A cream solder is applied to the reinforcing terminal patterns Bd and Bd, and then the connector D is placed at a predetermined position, and the solder is heated and melted in a reflow heating furnace, thereby obtaining a printed wiring board as shown in FIG. Pattern B for B signal terminal
c, Bc ... and the reinforcing terminal patterns Bd, Bd,
The signal terminals Dc, Dc... And the strength reinforcing terminals Dd, Dd of the connector D are soldered, and the connector D is mounted at a predetermined position on the printed wiring board B.

[0006]

Since the reinforcing terminal pattern Bd of the printed wiring board B is formed much larger than the strength reinforcing terminal Dd of the connector D, FIG.
As shown in FIG. 7A, large solder fillets f, f are formed, and sufficient soldering strength can be obtained.

On the other hand, since the reinforcing terminal pattern Bd is formed large, it is soldered (reflow soldering).
In this case, the strength reinforcing terminal Dd is formed on the reinforcing terminal pattern Bd.
In the case of the displacement, the connector D is mounted obliquely with respect to the printed wiring board B as shown in FIG.

In order to solve the above-mentioned inconvenience, a pattern Bd 'for reinforcing terminals is used as in a printed wiring board B' shown in FIG.
Is formed only slightly larger than the strength reinforcing terminal Dd of the connector D, so that the reinforcing terminal pattern B
A large displacement of the strength reinforcing terminal Dd on d 'is suppressed, and a displacement of the mounting position of the connector D with respect to the printed wiring board B' can be prevented.

However, as shown in FIG. 17B, only very small solder fillets f 'and f' are formed between the reinforcing terminal pattern Bd 'and the strength reinforcing terminal Dd, and sufficient soldering is performed. Can't get strength.

The present invention has been made in view of the above circumstances, and has as its object to provide a printed wiring board capable of preventing a mounting position shift without lowering the soldering strength when soldering a surface mount connector. It is assumed that.

[0011]

In order to achieve the above object, in a printed wiring board according to the present invention, a reinforcing terminal pattern is formed by forming a sufficient solder fillet around a strength reinforcing terminal in a surface mount connector. In addition to the size, notches are formed at opposing edges of the reinforcing terminal pattern.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing embodiments. FIG. 1 shows an electronic device employing a printed wiring board according to the present invention. The electronic device 1 includes a plurality of printed wiring boards 1 inside a casing 2.
0, 10 'are accommodated.

The printed wiring boards 10 and 10 'are respectively provided with a surface mount connector (male connector) 20, a surface mount connector
(Female connector) 20 'is provided.
The printed wiring board 10 and the printed wiring board 10 'are connected to each other via 0'.

As shown in FIG. 2, a surface mount connector (hereinafter referred to as a connector) 20 includes a plurality of contacts 21, 21,..., A plurality of signal terminals 22, 22,. Strength reinforcement terminal
(Nail) 23, 23 are provided.

On the other hand, as shown in FIG.
.. Correspond to the signal terminals 22, 22,... Of the connector 20, and the reinforcing terminal patterns 13, 1, corresponding to the strength reinforcing terminals 23, 23.
3 are formed.

As shown in FIGS. 4 and 5, each reinforcing terminal pattern 13 has a strength reinforcing terminal 23 of the connector 20.
Is formed sufficiently large over substantially the entire circumference, and specifically, is set to a size such that a sufficiently large solder fillet H is formed between itself and the strength reinforcing terminal 23 as described later. ing.

Each of the reinforcing terminal patterns 13 has a notch 13 having a concave shape at each of the opposed edges 13s, 13s.
A, 13A are formed, and these notches 13A, 1A are formed.
3A, when the connector 20 is mounted on the printed wiring board 10, the edge portion 13 extending along the longitudinal direction of the connector 20 is provided.
s, 13s.

Here, as shown in FIG. 5, the reinforcing terminal pattern 13 has a width W = 2.0 mm and a length L = 10 with respect to the strength reinforcing terminal 23 having a width w = 1.4 mm and a length 1 = 1.35 mm. It is formed to 2.2mm.

Notch 1 of reinforcing terminal pattern 13
3A is formed with a frontage O = 0.5 mm along the edge 13s, and a space S between the notches 13A, 13A facing each other is 1.6 m.
m, and when the strength reinforcing terminal 23 is located at the center of the reinforcing terminal pattern 13, the interval T between the low edge of each notch 13A and the side edge of the strength reinforcing terminal 23 is set to 0.1 mm. Have been.

A connector 20 is attached to the printed wiring board 10 described above.
, First, the signal terminal patterns 12, 12... And the reinforcing terminal patterns 13,
Apply cream solder to the surface of No. 13.

Next, the signal terminal patterns 12, 12
, And the reinforcing terminal patterns 13, 13, the signal terminals 22, 22,...

Thereafter, the solder is heated and melted in a reflow heating furnace, and the signal terminal patterns 12, 12,..., The reinforcing terminal patterns 13, 13, and the signal terminals 22, 2,
2, and the strength reinforcing terminals 23, 23 are soldered to each other, whereby the connector 20 is mounted at a predetermined position on the printed wiring board 10.

Here, as shown in FIG. 4, when the strength reinforcing terminal 23 is soldered to the center of the reinforcing terminal pattern 13, the reinforcing terminal pattern 13 and the strength reinforcing terminal 23 are provided as shown in FIG. Large solder fillets H, H are formed between the peripheral edge and the peripheral edge, so that sufficient soldering strength can be obtained.

On the other hand, when the connector 20 is mounted on the printed wiring board 10, as shown in FIG.
Even when the strength reinforcing terminals 23 and 23 are inclined with respect to the connector 13, the connector 20 is mounted at a predetermined position on the printed wiring board 10 as described later.

That is, as shown in FIGS. 7 and 8, when the strength reinforcing terminal 23 is misaligned with respect to the reinforcing terminal pattern 13, a part of the strength reinforcing terminal 23 is notched.
The portion 3A protrudes from the reinforcing terminal pattern 13.

In such a situation, the strength reinforcing terminal 2 is prevented from protruding from the reinforcing terminal pattern 13 due to the surface tension of the molten solder on the reinforcing terminal pattern 13.
8 in the direction in which the base 3 is placed on the reinforcing terminal pattern 13 (FIG. 8).
(Lower in the middle) acts.

As a result, the displacement is corrected by moving the strength reinforcing terminal 23 between the notches 13A, 13A of the reinforcing terminal pattern 13, and the connector 20 is fixed to the predetermined position of the printed wiring board 10 as shown in FIG. Will be implemented at the location.

As described above, in the printed wiring board 10 according to the present invention, when the connector 20 is soldered,
A sufficient soldering strength can be obtained, and a mounting position shift of the connector 20 with respect to the printed wiring board 10 can be prevented.

The mounting structure of the connector (female connector) 20 'on the printed wiring board 10' shown in FIG. 1 is basically the same as the mounting structure of the connector 20 on the printed wiring board 10 described above.

Next, another embodiment of the printed wiring board according to the present invention will be described with reference to FIGS. 9 (a) and 9 (b).

The printed wiring board 110 shown in FIG. 9A has opposite edge portions 113e and 113 of the reinforcing terminal pattern 113.
e, specifically, when the connector 20 is mounted on the printed wiring board 110, notches 113A, 113e are formed in edges 113e, 113e extending along the thickness direction of the connector 20, respectively.
13A are formed.

The configuration of the printed wiring board 110 described above is basically the same as the printed wiring board 10 shown in FIGS. 1 to 8 except for the shape of the reinforcing terminal pattern 113. Same as 10, so printed wiring board 1
Among the ten components, those having the same function as the components of the printed wiring board 10 will be described in detail by attaching the numbers obtained by adding 100 to the reference numerals in FIGS. 1 to 8 in FIG. 9A. Is omitted.

The printed wiring board 210 shown in FIG.
Are opposite edges 213 of the reinforcing terminal pattern 213
s, 213s and opposing edges 213e, 213e
Are formed with notches 213A, 213A,.

The configuration of the printed wiring board 210 described above is basically the same as that of the printed wiring board 10 shown in FIGS. 1 to 8 except for the shape of the reinforcing terminal pattern 213. Same as 10, so printed wiring board 2
Among the ten components, those having the same functions as those of the components of the printed wiring board 10 are described in detail by adding the numbers obtained by adding 200 to the reference numerals in FIGS. 1 to 8 in FIG. 9B. Is omitted.

In the above-described embodiment, the printed wiring board, which is housed in the casing of the electronic device together with another printed wiring board and mounts a connector to be fitted with a connector provided on the other printed wiring board, has been exemplified. Needless to say, the present invention can be effectively applied to a printed wiring board on which various types of connectors are mounted, such as a printed wiring board on which a connector exposed on a casing of an electronic device is mounted.

[0036]

As described above, in the printed wiring board according to the present invention, the reinforcing terminal pattern has a size enough to form a solder fillet around the strength reinforcing terminal in the surface mount connector. Notches are formed at opposing edges of the reinforcing terminal pattern. According to the above configuration, when the surface mounting connector is soldered to the printed wiring board, a sufficient solder fillet is formed around the strength reinforcing terminal of the surface mounting connector, and thus sufficient soldering strength can be obtained. Becomes In addition, according to the above configuration, when the strength reinforcing terminal is displaced with respect to the reinforcing terminal pattern, due to the surface tension of the molten solder on the reinforcing terminal pattern, between the notches of the reinforcing terminal pattern. The displacement of the surface mounting connector with respect to the printed wiring board is corrected by moving the strength reinforcing terminal. As described above, according to the printed wiring board of the present invention, it is possible to obtain sufficient soldering strength when soldering the surface mount connector, and to prevent the mounting position shift of the surface mount connector. Becomes

[Brief description of the drawings]

FIG. 1 is a cross-sectional side view conceptually showing an electronic device employing a printed wiring board of the present invention.

FIG. 2 is an external perspective view showing a surface mounting connector.

FIG. 3 is a plan view showing a printed wiring board according to the present invention.

FIG. 4 is a plan view showing a state where a connector for surface mounting is mounted on the printed wiring board of the present invention.

FIG. 5 is a plan view showing a pattern for reinforcing terminals in the printed wiring board of the present invention.

FIG. 6 is a sectional view taken along line VI-VI in FIG. 4;

FIG. 7 is a plan view showing a state where the surface mounting connector is mounted on the printed wiring board of the present invention with a positional shift.

FIG. 8 is a plan view of a principal part showing a state where the surface mounting connector is mounted on the printed wiring board of the present invention with displacement.

FIGS. 9A and 9B are plan views showing another embodiment of the printed wiring board according to the present invention.

FIG. 10 is a cross-sectional side view conceptually showing an electronic device employing a conventional printed wiring board.

FIG. 11 is an essential part perspective view showing a conventional printed wiring board and a surface mount connector.

FIG. 12 is an external perspective view showing a surface mounting connector.

FIG. 13 is a plan view showing a conventional printed wiring board.

FIG. 14 is a plan view showing a state in which a surface mounting connector is mounted on a conventional printed wiring board.

FIG. 15 is a plan view showing a state in which a surface mounting connector is mounted on a conventional printed wiring board with a positional shift.

FIG. 16 is a plan view showing a state in which a surface mount connector is mounted on a conventional printed wiring board.

17 (a) and (b) are cross-sectional views taken along line MM in FIG. 14 and cross-sectional views taken along line nn in FIG. 16;

[Explanation of symbols]

 10, 10 ', 110, 210 ... printed wiring board, 12 ... signal terminal pattern, 13, 113, 213 ... reinforcement terminal pattern, 13s, 113e, 213e, 213s ... edge, 13A, 113A, 213A ... notch , 20, 20 ': Surface mount connector, 22: Signal terminal, 23: Strength reinforcing terminal, H: Solder fillet.

Claims (1)

[Claims] 1. A signal terminal pattern and a reinforcing terminal pattern corresponding to a signal terminal and a strength reinforcing terminal of a surface mount connector, wherein the signal terminal pattern and the reinforcing terminal pattern include a signal terminal and a strength reinforcing terminal. A printed wiring board on which the surface mounting connector is mounted, wherein the reinforcing terminal pattern is formed with a sufficient solder fillet around the strength reinforcing terminal of the surface mounting connector. A printed wiring board having a size and a cutout formed at each of opposing edges of the reinforcing terminal pattern.