JP3057215B2 - Flexible printed circuit board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible printed circuit board for electrically connecting a circuit board provided in an electronic device or the like to other components, and more particularly to a flexible printed circuit having one end bent and soldered to a land on the circuit board. The present invention relates to a substrate (hereinafter, referred to as flexible).

[0002]

2. Description of the Related Art When connecting a flexible cable to a printed circuit board,
In some cases, it is necessary to solder the lands formed on the printed circuit board and the lands formed on the flexible board so as to face each other from the viewpoint of mounting. For example, as shown in FIG. 4, a pair of lands 2 formed on the back surface near the end of the flexible 1;
When soldering a pair of lands 4 formed on the surface of the printed circuit board 3, the ends of the flexible 1 are bent to the front side to represent the lands 2 on the surface, as shown in FIG. Are connected by solder 5.

[0003]

In the above-mentioned soldering operation, the bending line 6 of the flexible 1 must be substantially perpendicular to the end surface 1a of the flexible 1 as shown in FIG. No. For example, FIG.
As shown in (b), if the bending line 6 is not perpendicular to the end face 1a, the bent portion 1b will be inclined. Also, if the bending line 6 does not pass through the center of the land 2, FIG.
As shown in (d), the position appearing on the front side of the land 2 is shifted. In any case, when soldering to the land 4 of the printed circuit board 3, a soldering failure is likely to occur,
There was a problem that quality deteriorated.

In order to bend the flexible 1 at the correct position, the work must be performed carefully, which increases the number of man-hours, increases the cost, and causes the operator to be tired.

The present invention has been made in view of such circumstances, and provides a flexible printed circuit board which can be easily bent at an accurate position, and which can reduce the number of man-hours and cost and improve the quality. The purpose is to do.

[0006]

The flex according to the present invention is formed such that one end is bent along a bending line 6 in a direction perpendicular to the end face 1a, and is formed on a land 4 formed on the substrate 3 and an outer surface of the bent portion 1b. In the flexible 1 for soldering the land 2, the distances A and B between the opposite side edges 1 c and 1 d of the flexible 1 parallel to the bending line 6 and the bending line 6 are equalized.

[0007]

In the flexible 1 having the above-mentioned structure, the bending line 6 can be easily formed in a predetermined position and direction by aligning the opposing sides 1c and 1d when the flexible 1 is bent.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a flexible member according to an embodiment of the present invention.

FIGS. 1 and 2 show the configuration of an embodiment of the present invention. In these figures, parts corresponding to the parts of the conventional example shown in FIG. 4 and FIG. The feature of this embodiment is that the distances A and B shown in FIG. 1 between both sides 1c and 1d of the flexible 1 and the bending line 6 are equalized. Further, the bending line 6 passes through substantially the center of the land 2 in a direction parallel to the end surface 1a.

According to the present embodiment, when the flexible 1 is bent so that both sides 1c and 1d are aligned as shown in FIG. 2, the bending line 6 becomes a direction perpendicular to the end face 1a, Pass through the center. Therefore, the flexible 1 can be easily bent at an accurate position, and the number of steps and cost can be reduced, and the quality of the soldered portion can be improved.

FIG. 3 shows a state in which the flexible 1 according to the present embodiment is soldered to a flexible printed coil 11 for a motor. The flexible 1 shown in the present embodiment is an example, and the shapes of the flexible 1 and the land 2 are not limited to these.

[0012]

As described above, according to the flex of the present invention, the distance between the opposite sides of the flex parallel to the folding line and the folding line are equalized, so that the flex can be easily positioned at an accurate position. Therefore, the number of steps and cost can be reduced, and the quality of the soldered portion can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of an embodiment of a flex according to the present invention.

FIG. 2 is a perspective view showing a state in which the flexible board shown in FIG. 1 is soldered to a printed circuit board.

FIG. 3 is a plan view showing a state in which the flexible cable shown in FIG. 1 is soldered to a flexible print coil for a motor.

FIG. 4 is a perspective view showing a configuration of an example of a conventional flex.

FIG. 5 is a perspective view showing a state in which the flexible board shown in FIG. 4 is soldered to a printed circuit board.

FIG. 6 is a plan view illustrating a problem of the flex shown in FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flexible (flexible printed circuit board) 1a End surface 1b Bending part 1c, 1d Side 2, 4, Land 3 Printed circuit board 5 Solder 6 Bending line

Claims (1)

(57) [Claims] 1. A flexible printed circuit board, one end of which is bent along a bending line in a direction perpendicular to the end face, and solders a land formed on the substrate and a land formed on an outer surface of the bent portion, A distance between both sides of the flexible printed circuit board, which is parallel to the flexible printed circuit board, and the bending line are equalized.