JP2005348096A - Foldable portable radio - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To ensure high antenna performance both in a case where a foldable portable radio is placed on a metal plate while a case is closed, and in a call state in the foldable portable radio. <P>SOLUTION: In the foldable portable radio having a hinge 3 for rotatably connecting an upper casing 1 to a lower one 2, a helical antenna 4 is arranged so that it projects to the side of the loser casing 2 at a hinge side 2 of the upper casing 1. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an antenna of a foldable portable wireless device.

  In conventional folding portable wireless devices, for example, as shown in FIGS. 7 and 8, antennas arranged on the hinge 3 side of the lower housing 2 are widely used. An example of such a configuration is a foldable portable wireless device described in Patent Document 1. In this configuration, since the antenna 4 is separated from the head 22 in the call state shown in FIG. 8, high antenna performance can be ensured in the call state.

As another example, a configuration in which the antenna 4 is arranged at the uppermost end of the upper housing 1 as shown in FIGS. 9 and 10 is used.
JP 2002-27066 A

  However, in the foldable portable radio device in which the conventional antenna 4 is arranged on the hinge 3 side of the lower housing 2, the housing is closed and the rear sub display 5 is directed upward as shown in FIG. When placed on the metal plate 19, there is a problem that the distance h2 between the antenna 4 and the metal plate 19 is about 5 mm or less and the antenna performance is deteriorated.

  Further, in the folding portable wireless device in which the conventional antenna 4 is arranged at the uppermost end of the upper housing 1, the housing is closed and placed on the metal plate 19 with the battery side down as shown in FIG. In some cases, the distance h3 between the antenna 4 and the metal plate 19 can be set to be 20 mm or more. However, as shown in FIG. 10, there is a problem that the antenna performance deteriorates due to the proximity of the antenna unit and the head 22 in a call state in which the housing is opened.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a foldable portable wireless device that can ensure high antenna performance both in a case where the casing is closed and placed on a metal plate and in a talking state. It is to provide.

  In order to achieve the above object, a foldable portable wireless device according to the present invention is a foldable portable wireless device having a hinge portion that rotatably connects an upper housing and a lower housing, The antenna unit is arranged to protrude toward the lower casing on the hinge section side of the upper casing.

  According to the above configuration, high antenna performance can be obtained in a call state.

  Further, the antenna unit is disposed at a position on the opposite side of the surface of the upper housing with respect to the surface of the upper housing when the upper housing and the lower housing are closed. Composed.

  According to the above configuration, high antenna performance can be obtained in a state where the casing is closed and the lower casing is placed in contact with the metal plate.

In addition, a display portion that can be seen in a state where the housing is closed is provided on the first surface of the upper housing,
The antenna unit is configured to be arranged at a predetermined distance from the object in a state where the folding portable wireless device is placed on the object with the display unit facing upward. The
According to the above configuration, high antenna performance can be obtained in a state where the casing is closed and the lower casing is placed in contact with the metal plate.

  In addition, a power feeding circuit connected to the antenna unit built in the upper housing, a radio circuit disposed in the lower housing, and a power feeding system for connecting the power feeding circuit and the radio circuit through the hinge unit. It is comprised so that it may comprise.

  According to the said structure, a loss can be reduced by shortening a feed system, and high antenna performance is obtained.

  According to the present invention, high antenna performance can be ensured both when the case is closed and placed on a metal plate and in a talking state.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a folding portable wireless device according to the present invention will be described in detail with reference to the drawings.

  1 to 4 are diagrams showing a basic configuration of a foldable portable wireless device according to an embodiment of the present invention, and FIG. 1 is a perspective view of a state in which a housing of the foldable portable wireless device is opened. 2 is a side view in which the housing is closed and placed on a metal plate, FIG. 3 is a side view in a state in which the housing is opened, and FIG. 4 is an enlarged view of the vicinity of the antenna of the folding portable wireless device.

  The portable wireless device according to the present embodiment includes an upper housing 1, a lower housing 2, a hinge unit 3, a helical antenna 4, a sub display unit 5, a sound generation unit 6, and a main display unit 7. The upper housing 1 and the lower housing 2 are made of resin, and generally have a length of 100 mm and a width of about 50 mm.

  The upper housing 1 and the lower housing 2 are connected so as to be rotatable by a hinge portion 3, and the hinge portion 3 is fixed to the lower housing 2 by a mounting screw 18. The sound generator 6 is disposed at the upper end of the upper housing 1. The main display unit 7 is disposed in the upper casing 1, and the sub-display unit 5 can confirm the displayed information even when the casing is closed on the opposite side of the main display unit 5 in the upper casing 1. It is arranged like this.

  The helical antenna 4 is disposed on the hinge portion 3 side of the upper housing 1 and protrudes in the direction of the lower housing 2 when the housing is opened. Further, the helical antenna 4 is disposed so as to be opposite to the lower housing 2 in a state where the housing is closed. With such an antenna arrangement, when the upper housing 1 is placed on an object such as a metal plate with the upper housing 1 facing upward, the distance h1 between the helical antenna 4 and the metal plate 19 is about 20 mm.

  The matching circuit 10 of the helical antenna 4 is provided near the helical antenna 4 of the upper circuit board 17 and is electrically connected to the feeding terminal 8 of the antenna via the feeding land 9. The wireless circuit 13 is provided on the lower circuit board 15 so that the distance from the battery 14 is shortened, and power is supplied from the battery 14.

  The radio circuit 13 and the matching circuit 10 are electrically connected via a coaxial cable 16. The coaxial cable 16 passes through the hinge portion 3 and is connected to the power supply connector 11 of the matching circuit 10 and the power supply connector 12 of the wireless circuit 13. The power feeding connectors 11 and 12 are provided near the hinge portion of each substrate so that the coaxial cable 16 is as short as possible.

  The antenna operation when the radio frequency is set to 900 MHz in the folding portable radio configured as described above will be described.

  FIG. 6 is a diagram for explaining a call state in which the user holds the foldable portable radio apparatus having the above configuration with his / her hand to make a call. The user puts the sound generator 6 on his / her ear to make a call, so the helical antenna 4 provided near the hinge 3 is separated from the head 22. Therefore, as compared with the conventional configuration in which the antenna is arranged at the upper end of the upper casing as shown in FIG. 9, high antenna performance can be ensured in a call state.

  Further, when the case is closed and the folding portable wireless device is placed on an object such as a metal plate, the sub display unit 5 is generally placed so as to face upward. Therefore, as shown in FIG. 2, the distance h <b> 1 between the helical antenna 4 disposed in the upper housing and the metal plate 19 can always be secured about 20 mm, and the antenna is separated from the metal plate 19.

  FIG. 5 shows the directivity of the horizontal plane (XY plane) in a state where the present embodiment is placed on the metal plate. 20 represents vertical polarization, and 21 represents horizontal polarization. The horizontal plane gain of this example obtained from the horizontal plane directivity of FIG. 5 is −14 [dBd]. On the other hand, the horizontal gain of the conventional example in which the antenna as shown in FIG. 7 is arranged on the hinge side of the lower housing is −22 [dBd]. Therefore, by using the configuration of this embodiment, a high antenna gain can be obtained in a state where the casing is closed and placed on a metal plate.

  Further, both the power supply connector 12 of the wireless circuit 13 and the power supply connector 11 of the matching circuit 10 are arranged on the hinge portion 3 side so that the length of the coaxial cable 16 is as short as possible. Therefore, the loss due to the coaxial cable 16 is reduced, and the effect of increasing the antenna gain is obtained.

  In the present embodiment, a helical antenna is used as the antenna 4, but a built-in inverted L antenna or inverted F antenna may be used.

  In a foldable portable radio device, high antenna performance can be ensured both when the case is closed and placed on a metal plate and in a talking state, which is useful for a foldable portable phone and the like.

The perspective view of the state which opened the housing | casing of the foldable portable radio | wireless machine which concerns on embodiment of this invention The side view which closed the case of the foldable portable radio concerning the embodiment of the present invention, and put it on the metal plate The side view of the state which opened the housing | casing of the foldable portable radio | wireless machine which concerns on embodiment of this invention Enlarged view of the vicinity of the antenna of the folding portable wireless device according to the embodiment of the present invention The figure which shows the antenna directivity on a metal plate in the foldable portable radio | wireless machine which concerns on embodiment of this invention. The figure explaining the telephone call state of the foldable portable wireless device which concerns on embodiment of this invention Side view of the first conventional example The figure explaining the telephone call state of the 1st conventional example Side view of second conventional example The figure explaining the telephone call state of the 2nd prior art example

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Upper housing | casing 2 Lower housing | casing 3 Hinge part 4 Helical antenna 5 Subdisplay part 6 Sounding part 7 Main display part 8 Feeding terminal 9 Feeding land 10 Matching circuit 11 Feeding connector 12 Feeding connector 13 Radio circuit 14 Battery 15 Lower circuit board 16 Coaxial cable 17 Upper circuit board 18 Mounting screw 19 Metal plate 20 Vertical polarization 21 Horizontal polarization 22 Human head

Claims (4)

A foldable portable wireless device having a hinge portion that rotatably connects an upper housing and a lower housing,
A foldable portable wireless device comprising an antenna portion arranged to project toward the lower housing side on the hinge portion side of the upper housing. In a state where the upper housing and the lower housing are closed,
The foldable portable wireless device according to claim 1, wherein the antenna unit is arranged at a position on the surface of the upper housing that is closer to the opposite surface to the lower housing. Provided on the first surface of the upper housing with a display portion that can be seen in a closed state of the housing,
The antenna unit is disposed so as to be spaced from the object by a predetermined distance in a state where the folding portable wireless device is placed on the object with the display unit facing upward. The foldable portable wireless device according to claim 1. A power feeding circuit connected to the antenna unit built in the upper housing;
A radio circuit disposed in the lower housing;
4. The foldable portable wireless device according to claim 1, further comprising a power feeding system that connects the power feeding circuit and the radio circuit through the hinge portion.

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