JP2002300247A - Foldable portable telephone system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the dimensions of the screwing parts of a flexible printed circuit board in a turning axial direction, which goes through the hinge part of a foldable portable telephone system. SOLUTION: The flexible printed circuit board 1 has the screwing parts 1ba that screw in the turning direction of the hinge part while extending in the turning axial direction and also overlap on each other in the hollow part of the hinge part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foldable portable telephone device in which a flexible printed board is spirally wound at a hinge.

[0002]

2. Description of the Related Art At present, foldable portable telephone devices and foldable PHs are used.
S (Personal Handyphone Sys)
tem) is commercially available. In this folding type device, two rotating bodies of a receiving unit and a transmitting unit are rotatably connected by a hinge, and a flexible connecting unit electrically connects the receiving unit and the transmitting unit in the hinge. Printed circuit board is passing. The flexible printed circuit board in the hinge portion is spirally wound in order to prevent damage such as disconnection due to opening and closing (see JP-A-1-89845).

[0003] The larger the number of turns of the spiral, the smaller the change in the diameter of the spiral portion due to opening and closing, and the less the damage. According to the inventor's experiment, double winding has twice or more the durability of opening and closing as compared with single winding.

[0004]

However, when the number of turns of the spiral is increased, there is a problem that the axial dimension of the spiral portion is increased and the external dimensions of the foldable portable telephone device are increased.

[0005]

SUMMARY OF THE INVENTION In view of the foregoing, a foldable portable telephone device according to the present invention is provided with a first housing which passes through an empty space of a hinge portion which pivotally supports both housings so that the housing can be opened and closed. From the second
Having a flexible printed circuit board disposed over the case, the flexible printed circuit board in the space,
There is a spiral portion which extends in the rotation axis direction of the hinge portion and spirals in the rotation direction of the hinge portion and overlaps with each other.

Thus, the size of the flexible printed circuit board in the direction of the rotation axis can be reduced.

The flexible printed circuit board has a helical portion spirally wound at least one turn in the rotation axis direction of the hinge portion in the space, and an extension portion extending from the inside of the spiral in the rotation axis direction. And

Thus, the size of the flexible printed circuit board in the direction of the rotation axis can be further reduced.

Further, the flexible printed circuit board has a helical portion spiraling at least one turn in the rotation axis direction of the hinge portion in the hollow portion, and is inclined from the inside of the helix to the helical portion in the rotation axis direction. And an extending portion extending therefrom.

[0010] This makes it possible to further reduce the size of the flexible printed board in the direction of the rotation axis.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing a flexible printed circuit board (1) before being spirally wound, and FIG. 2 is a plan view showing a flexible printed circuit board (1) being spirally wound. FIG. 3 is a partially transparent perspective view showing a state before the printed circuit board to which the flexible printed circuit board (1) is attached is mounted on the housing of the mobile phone device, and FIG. is there.

As shown in FIG. 4, the portable telephone device of this embodiment is of a foldable type having a transmitting section (2), a receiving section (3), and a hinge section (4). The transmitting section (2) and the receiving section (3) are rotatably connected by a hinge section (4).

The flexible printed circuit board (1) is a conductor pattern (see FIG. 3) for electrically connecting the printed circuit board (2a in FIG. 3) of the transmitting section (2) and the printed circuit board (3a in FIG. 3) of the receiving section (3). 1) 11). Conductor pattern (11)
Is a silver earth and a plurality of signal lines each having a thickness of about 40 μm, and the insulating sheet (1) except for tabs (11a) and (11b) connected to the connector (2b in FIG. 3) (3b in FIG. 3).
Insulated in 2). The insulating sheet (12) has a thickness of about 1
2.5 μm (half-mill) polyimide or polyester.

In FIG. 1, a flexible printed circuit board (1) has a lower part (1a) located at a transmitting part (2), a central part (1b) located at a hinge part (4), and a receiving part (3). )
(1c).

The lower part (1a) and the upper part (1c) of the flexible printed board (1) extend at right angles to the rotation axis of the hinge part (4).

The central portion (1b) of the flexible printed board (1) has a spiral portion (1ba) and an extending portion (1bb). As shown in FIG. 1, the spiral part (1ba) forms an angle of 72 degrees with the rotation axis of the hinge part (4). As shown in FIG. 3, the spiral part (1ba) spirals one or more turns in the rotation direction of the hinge part (4) with the transmitting part (2) side outward, and the spiral partly overlaps the inner part and the outer part. The hinge (4) extends in the direction of the rotation axis.

As described above, since the outside and the inside overlap, the dimension of the spiral portion in the rotation axis direction is reduced. Thus, the flexible printed circuit board (1) can be stored in the short space of the hinge (4).

The extension part (1bb) is located between the inside of the spiral of the spiral part (1ba) and the upper part (1c), and the hinge part (4).
Extend in the same direction as the rotation axis of the.

As described above, by extending in one direction of the rotation axis, the conductor pattern (1) escapes from the overlap of the helical portions in the direction of the rotation axis and moves to the reception section (3) perpendicular to the rotation axis.
1) can be lengthened. If the extension is not provided, for example, if the shape is as shown in FIG.
The axial dimension of the helical portion increases.

As shown in FIG. 5, the spiral portion where the spirals overlap may be perpendicular to the spiral axis. Further, as shown in FIG. 6, even if the extending portion that escapes from the overlapping extending portion is not parallel to the rotation axis direction and forms an angle, the escape portion can escape. However, this angle must be smaller than the extension.

[0021]

As the number of turns of the flexible printed circuit board spirally wound by the hinge of the foldable portable telephone device increases, the change in the diameter of the spiral portion due to opening and closing decreases, and the damage decreases.
The flexible printed circuit board of the present invention has spiral portions that extend in the rotation axis direction of the hinge portion and that spiral and overlap each other. Thereby, the dimension of the spiral part in the rotation axis direction can be shortened.

Further, the flexible printed board of the present invention has an extending portion extending in the rotation axis direction from the inside of the spiral. Thereby, it is possible to escape from the inside of the overlapping spiral portion to one of the housings, and to maintain the overlapping of the spirals.

As described above, according to the present invention, the dimension of the spiral portion in the rotation axis direction can be shortened, so that the size can be reduced, and damage can be reduced by forming a large number of turns.

[Brief description of the drawings]

FIG. 1 is a plan view showing a flexible printed board according to the present embodiment.

FIG. 2 is a plan view showing a spirally-printed flexible printed circuit board.

FIG. 3 is a partially transparent view showing a state before a flexible printed circuit board is incorporated into a mobile phone terminal.

FIG. 4 is a partially transparent perspective view showing a state after being assembled in FIG. 4;

FIG. 5 is a plan view showing another flexible printed circuit board of the present embodiment.

FIG. 6 is a plan view showing another flexible printed circuit board of the present embodiment.

FIG. 7 is a plan view showing an unpreferable example of a flexible printed circuit board.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flexible printed board 1a Lower part 1b Central part 1ba Spiral part 1bb Extension part 1c Upper part 2 Transmission part 3 Receiver part 4 Hinge part

Continued on the front page (72) Inventor Jiro Ozaki 3-201 Minamiyoshikata, Tottori City, Tottori Prefecture F-term (reference) in Sanyo Electric Co., Ltd.

Claims (3)

[Claims] A first housing, a hinge portion rotatably supporting the two housings so as to be openable and closable, and a second housing extending from the first housing through the hollow space of the hinge portion. A flexible printed circuit board disposed over the housing, wherein the flexible printed circuit board spirals in the rotation direction of the hinge while extending in the rotation axis direction of the hinge in the space, and A foldable portable telephone device having spiral portions overlapping each other. 2. A first housing comprising: a first housing; a second housing; a hinge portion rotatably supporting the two housings so as to be openable and closable; and a second housing from the first housing passing through the hollow space of the hinge portion. A flexible printed circuit board disposed over the housing, wherein the flexible printed circuit board has a spiral portion spiraling at least one turn or more in the rotating direction of the hinge portion in the space, and A foldable portable telephone device comprising: an extension portion extending in the rotation axis direction. 3. A first housing including a first housing, a second housing, a hinge portion rotatably supporting the two housings and having an empty space, and a second housing extending from the first housing through the empty space of the hinge portion. A flexible printed circuit board disposed over the housing, wherein the flexible printed circuit board has a spiral portion spiraling at least one turn or more in the rotating direction of the hinge portion in the space, and An extending portion extending at an angle greater than or equal to the spiral portion in the direction of the rotation axis.