JP2011244071A - Portable wireless device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable wireless device which has a rotation two-shaft structure as a housing structure, and in which high antenna performance is acquired in a state of both a normally-closed state and viewer state unique to the rotation two-shaft structure.SOLUTION: A distance between the first and second antenna element 23 and 43 is secured in the case where a display section 41 is closed in a state of being not exposed more than in the case where the display section 41 is closed in a state of being exposed. Thereby, a mutual influence between antennas can be reduced, and a high antenna performance can be secured in each of the first and second antenna element 23 and 43. The first and second antenna element 23 and 43 are arranged so as to be closer to each other in the case where a display section 41 is closed in a state of being exposed than in the case where the display section 41 is closed in a state of being not exposed. Thereby, the first and second antenna element 23 and 43 is coupled with each other, and the second antenna element 43 can be used as a feed element, and the first antenna element 23 can be used a reflector element, and an antenna having a strong directivity in direction of the display section 41 side can be realized.

Description

  The present invention relates to a foldable portable wireless device having a rotating biaxial structure.

  In recent mobile phones, a plurality of wireless systems (GPS (Global Positioning System), Bluetooth (registered trademark), One Seg, etc.) are installed in addition to a wireless system for performing cellular communication. It is coming. In addition, as represented by a foldable type, there is a type in which a user can select a housing state depending on the application. For example, the foldable portable wireless device disclosed in Patent Document 1 includes a built-in antenna in the upper housing and a conductor element in the lower housing, and when the closed state is selected, the conductor element in the lower housing is the upper housing. Combined with the built-in antenna of the body to obtain directivity.

JP 2003-037415 A

  By the way, some portable wireless devices that can select the housing state have a rotating biaxial structure (also referred to as “swivel structure”). In a portable wireless device having this rotating two-axis structure, the portable wireless device is in a closed state (“ It is possible to select a viewer state that is normally called “closed state”, an open state at the time of a call, and a viewer state in which the screen is visible when watching 1Seg. However, the portable wireless device having this rotating biaxial structure has a problem that satisfactory antenna performance is not obtained in both the closed state and the viewer state.

  The present invention has been made in view of such circumstances, and has a rotating biaxial structure as a housing structure, and high antenna performance can be obtained in both a normal closed state and a viewer state that are unique to the rotating biaxial structure. An object is to provide a portable radio.

  The portable wireless device of the present invention includes a first housing, a second housing, a third housing, a first housing that rotatably connects the first housing and the second housing in a first direction. A first hinge portion; a second hinge portion that rotatably connects the second housing and the third housing in a second direction; a display portion disposed in the third housing; and the first A first antenna element for the first radio system, the second antenna element for the second radio system, the first antenna element, and the first casing disposed in the casing. And a termination portion that terminates at a specific impedance at the operating frequency of the second radio system, and is operated at the operating frequency between the first radio system and the second radio system. And the first casing and the second casing with the display portion exposed. In the closed state, the first antenna element and the second antenna element are close to each other, and the first antenna element and the second antenna element are closer than when the display unit is not exposed. When the display unit is closed with the display unit exposed, the first antenna element is arranged closer to the second antenna element when the display unit is closed with the display unit exposed. It operates as a reflective element.

  According to the above configuration, the first antenna element and the second antenna element are in a state in which the display unit is exposed rather than in a case where the display unit is closed without being exposed (that is, when the display unit is closed in the “normally closed state”). Since it is arranged so that it is closer when it is closed (ie, when it is closed in the “viewer state”), the distance between the first antenna element and the second antenna element (between the antennas) is normally set in the closed state. Can be ensured, and the influence of antennas can be reduced. Thereby, high antenna performance can be secured in each of the first antenna element and the second antenna element. On the other hand, in the viewer state, the first antenna element and the second antenna element are coupled, and the second antenna element can be used as a feeding element and the first antenna element can be used as a reflecting element. Obtainable.

  In the above configuration, the second wireless system is a GPS.

  According to the above configuration, when the second wireless system is a GPS, it is preferable because strong directivity can be obtained on the display unit side in the viewer state.

  According to the present invention, the housing structure has a rotating biaxial structure, and high antenna performance can be obtained in both the normally closed state and the viewer state that are characteristic of the rotating biaxial structure.

1 is a perspective view showing an overview of a portable wireless device according to an embodiment of the present invention. Schematic diagram showing a state in which the portable wireless device of FIG. 1 is closed in a normally closed state and in a viewer state The block diagram which shows schematic structure of the termination | terminus part of the portable radio | wireless machine of FIG.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments for carrying out the invention will be described in detail with reference to the drawings.

  1A and 1B are perspective views showing an overview of a portable wireless device according to an embodiment of the present invention, in which FIG. 1A shows a vertically opened state, FIG. 1B shows a vertically opened state, and a third housing. The state which rotated the body 4 about 90 degree | times is shown. In the figure, a portable wireless device 1 according to the present embodiment is a foldable portable wireless device having a rotating biaxial structure, and a first hinge unit 10 connects a first housing 2 and a second housing 3. The second casing 3 is pivotably connected so that the second casing 3 can be rotated in the longitudinal opening direction A (see FIG. 1A, the first direction), and the second hinge portion 11 is connected to the second casing 3. The third housing 4 is rotatably connected to enable the third housing 4 to rotate in the left-right direction B (see FIG. 1B, second direction). A key operation unit 21 is provided on the front side of the first housing 2. A display unit 41 is provided on the front side of the third housing 4.

  2A is a schematic diagram showing a state in which the portable wireless device 1 in FIG. 1 is normally closed, and FIG. 2B shows a state in which the portable wireless device 1 in FIG. 1 is closed in a viewer state. FIG. In the figure, the portable wireless device 1 includes, on the first housing 2 side, a circuit board 22 on which the first wireless system is mounted, a first antenna element 23, and a terminal portion 24, and a third housing 4 On the side, a circuit board 42 on which the second wireless system is mounted and a second antenna element 43 are provided.

  The operating frequency is different between the first wireless system mounted on the circuit board 22 and the second wireless system mounted on the circuit board 42. For example, when the first wireless system is Bluetooth and the second wireless system is GPS, the operating frequency of the first wireless system is a 2.45 GHz band, and the operating frequency of the second wireless system is a 1.5 GHz band. The termination unit 24 is interposed between the first antenna element 23 and the ground pattern of the circuit board 22 and terminates with a specific impedance at the operating frequency of the second wireless system. FIG. 3 is a block diagram illustrating a schematic configuration of the termination unit 24. In the figure, the termination unit 24 includes a cutoff circuit 241 that cuts off the operating frequency of the second wireless system, and a phase adjustment circuit 242 that adjusts the phase of the first antenna element 23.

  When the display unit 41 is closed without being exposed (when closed in the “normally closed state”), when the display unit 41 is closed with exposed state (when closed in the “viewer state”). In addition, the distance between the first antenna element 23 and the second antenna element 43 can be secured, and the mutual influence can be reduced. Thereby, high antenna performance can be ensured in each of the first antenna element 23 and the second antenna element 43.

  On the other hand, when the display unit 41 is closed in an exposed state (when closed in the “viewer state”), the first antenna element 23 and the second antenna 23 are compared to when the display unit 41 is closed without being exposed. Since the element 43 is disposed so as to be close to each other, the first antenna element 23 and the second antenna element 43 are combined, and the second antenna element 43 is used as a feeding element and the first antenna element 23 is used as a reflecting element. Thus, an antenna having strong directivity on the display unit 41 side can be realized. Since the cutoff circuit 241 of the termination unit 24 blocks the operating frequency of the second wireless system, the first antenna element 23 does not operate at the operating frequency of the second wireless system. In addition, the directivity can be adjusted by the phase adjustment circuit 242 of the termination unit 24. Thereby, radio systems, such as GPS, can be used conveniently for the 2nd radio system. The directivity is in the direction of arrow C as shown in FIG.

  As described above, when the display unit 41 is closed without being exposed, a distance between the first antenna element 23 and the second antenna element 43 can be secured, and the first antenna element 23 and the second antenna element are secured. High antenna performance can be ensured in each of 43. Further, when the display unit 41 is closed in an exposed state, the second antenna element 43 can be used as a feeding element, and the first antenna element 23 can be used as a reflection element, which has strong directivity on the display unit 41 side. An antenna can be realized.

  As described above, according to the portable wireless device 1 according to the present embodiment, the first housing 2, the second housing 3, the third housing 4, the first housing 2 and the second housing 3 are provided. Is connected to the first hinge portion 10 that is rotatably connected in the longitudinal opening direction A (first direction), and the second housing 3 and the third housing 4 are rotatably connected in the left-right direction B (second direction). The second hinge unit 11, the display unit 41 disposed in the third housing 4, the first antenna element 23 for the first wireless system disposed in the first housing 2, and the third housing 4 And is provided between the second antenna element 43 for the second radio system, the first antenna element 23, and the ground pattern of the circuit board 22 in the first housing 2, and the operating frequency of the second radio system In the first wireless system and the second wireless system have different operating frequencies. In a state where the first housing 2 and the second housing 3 are closed with the display unit 41 exposed (viewer state), the first antenna element 23 and the second antenna element 43 are close to each other, and The antenna element 23 and the second antenna element 43 are closer to each other when the display unit 41 is closed with the display unit 41 exposed than when the display unit 41 is closed without being exposed (normally closed state). When the display unit 41 is closed with the display unit 41 exposed (in the viewer state), the first antenna element 23 operates as a reflective element of the second antenna element 43. High antenna performance can be obtained in both states of the viewer state.

  The present invention has a rotating biaxial structure as a housing structure, and has an effect that high antenna performance can be obtained in both a normally closed state and a viewer state peculiar to the rotating biaxial structure. It can be applied to portable wireless devices such as mobile phones and PHS (Personal Handy-Phone System).

DESCRIPTION OF SYMBOLS 1 Portable radio device 2 1st housing | casing 3 2nd housing | casing 4 3rd housing | casing 10 1st hinge part 11 2nd hinge part 21 Key operation part 22, 42 Circuit board 23 1st antenna element 24 Termination part 41 Display part 43 Second antenna element 241 Blocking circuit 242 Phase adjustment circuit

Claims (2)

A first housing;
A second housing;
A third housing;
A first hinge portion rotatably connecting the first housing and the second housing in a first direction;
A second hinge portion that rotatably connects the second housing and the third housing in a second direction;
A display unit disposed in the third housing;
A first antenna element disposed in the first housing for a first wireless system;
A second antenna element disposed in the third housing for a second wireless system;
A termination portion provided between the first antenna element and a ground pattern of a circuit board in the first housing and terminated with a specific impedance at an operating frequency of the second wireless system;
The operating frequency is different between the first wireless system and the second wireless system,
In a state where the first housing and the second housing are closed with the display unit exposed, the first antenna element and the second antenna element are close to each other,
The first antenna element and the second antenna element are arranged so that the case where the display unit is closed with the display unit exposed is closer than the case where the display unit is closed without the display unit being exposed. And
When the display unit is closed in an exposed state, the first antenna element operates as a reflective element of the second antenna element.   The portable wireless device according to claim 1, wherein the second wireless system is a GPS.

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