JPH05226799A - Flexible printed board - Google Patents

Abstract

PURPOSE:To make it possible to easily bend a flexible printed board at an accurate position when the board is bent in order to expose lands formed on the rear surface of the board to the front side. CONSTITUTION:Opposite lateral sides 1c and 1d are parallel to a bending line 6 of a flexible printed board 1, and the distance A between the side 1c and the bending line 6 and the distance B between the side 1d and the line 6are set to be equal. The bending line 6 is accurately positioned and directed by bending both lateral sides 1c and 1d while they are brought into line with each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible printed board for electrically connecting a board provided in an electronic device or the like to other parts, and more particularly to a flexible printed board in which one end is bent and soldered to a land on the 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,
Due to the mounting relationship, it may be necessary to make the land formed on the printed circuit board and the land formed on the flexible board face each other and solder. For example, as shown in FIG. 4, a pair of lands 2 formed on the back surface of the flexible member 1 near the ends thereof,
When soldering the pair of lands 4 formed on the surface of the printed circuit board 3, the end of the flex 1 is bent to the front side to expose the land 2 on the surface as shown in FIG. Are connected with solder 5.

[0003]

In the soldering work as described above, the bending line 6 of the flexible cable 1 must be almost perpendicular to the end face 1a of the flexible cable 1 and pass through the center of the land 2 as shown in FIG. I won't. For example, in FIG.
As shown in (b), if the bending line 6 is not at right angles to the end face 1a, the bending portion 1b will tilt. If the bending line 6 does not pass through the center of the land 2, (c) of FIG.
As shown in (d), the position on the front side of the land 2 is displaced. In either case, when soldering with the land 4 of the printed circuit board 3, soldering failure easily occurs,
There was a problem that the quality deteriorates.

Further, in order to bend the flexible member 1 in the correct position, the work must be carefully performed, which has a drawback that the man-hour increases, the cost increases, and the operator is tired.

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

[0006]

The flexure of the present invention has one end bent along a bending line 6 perpendicular to the end face 1a and formed on the outer surface of the land 4 and the bent portion 1b formed on the substrate 3. In the flexure 1 for soldering the land 2 to the land 2, the distances A and B between the opposite side edges 1c and 1d of the flexure 1 parallel to the bending line 6 and the bending line 6 are made equal.

[0007]

In the flex 1 having the above construction, the bending line 6 can be easily formed at a predetermined position and direction by aligning the opposite side edges 1c and 1d when the flex 1 is bent.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the flexure of the present invention will be described below with reference to the drawings.

1 and 2 show the configuration of an embodiment of the present invention. In these figures, parts corresponding to those of the conventional example shown in FIGS. 4 and 5 are denoted by the same reference numerals, and description thereof will be omitted as appropriate. The feature of this embodiment is that the distances A and B shown in FIG. 1 between the both sides 1c and 1d of the flexible cable 1 and the bending line 6 are made equal. 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 this embodiment, when the flexible member 1 is bent, as shown in FIG. 2, by aligning both sides 1c and 1d, the bending line 6 becomes a direction perpendicular to the end face 1a and the land 2 Pass through the center. Therefore, the flexible member 1 can be easily bent at an accurate position, which can reduce the number of steps and costs and improve the quality of the soldered portion.

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

[0012]

As described above, according to the flexure of the present invention, since the distance between the opposite side edges of the flexure parallel to the bending line and the folding line is equal, the flexing can be easily performed at a correct position. Therefore, it is possible to reduce the number of steps and costs and improve the quality of the soldered portion.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of an embodiment of a flexible film of the present invention.

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

FIG. 3 is a plan view showing a state in which the flex shown in FIG. 1 is soldered to a motor flexible printed coil.

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

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

FIG. 6 is a plan view illustrating a problem of the flexure shown in FIG.

[Explanation of symbols]

 1 Flexible (Flexible Printed Circuit Board) 1a End Face 1b Bent Part 1c, 1d Sides 2, 4 Land 3 Printed Circuit Board 5 Solder 6 Bent Line

Claims (1)

[Claims] 1. A flexible printed circuit board in which one end is bent along a bending line perpendicular to the end face and the land formed on the substrate is soldered to the land formed on the outer surface of the bent portion. 2. The flexible printed circuit board is characterized in that the distance between the opposite side edges of the flexible printed circuit board parallel to and the bending line is equal.