JP4707728B2 - Portable wireless device - Google Patents

Description

  The present invention relates to a portable wireless device, and more particularly to a portable wireless device that performs communication by opening a housing from a folded state.

2. Description of the Related Art Conventionally, a portable wireless device that can be folded in two has been known in which an L-shaped antenna element is disposed in a lower housing (for example, Patent Document 1). According to Patent Document 1, the antenna element is arranged near the hinge portion of the lower housing and is fed from a power feeding portion on a circuit board provided in the lower housing. Further, the L-shaped antenna element can transmit and receive both main polarization and cross polarization.
JP 2007-189609 A

  However, the portable wireless device of Patent Document 1 has a problem in that radiation from the antenna is hindered because the caller's hand covers the lower housing during a call. Further, in the portable wireless device of Patent Document 1, when communicating with the portable wireless device placed on a metal desk or the like, the distance between the antenna element arranged on the lower housing and the metal desk approaches. Therefore, there is a problem that the antenna characteristics deteriorate. Also, when power is supplied from the long side of the L-shaped antenna element consisting of the long side and the short side, uniform antenna characteristics cannot be obtained by transmission / reception of main polarization and transmission / reception of cross polarization. There's a problem. Furthermore, in the portable wireless device disclosed in Patent Document 1, when the lower housing has a housing ground portion, there is a problem that the housing ground portion interferes with radiation of electromagnetic waves from the antenna element.

  The present invention has been made in view of such a point, and by disposing an antenna element capable of transmitting and receiving both main polarization and cross polarization separately from the housing ground portion, it is possible to prevent deterioration of antenna characteristics. An object of the present invention is to provide a portable radio device that can be used.

A portable wireless device according to an embodiment of the present invention is provided between an upper casing, a lower casing, and an upper casing and a lower casing, and the upper casing and the lower casing are connected to the first casing. A first hinge portion that is rotatably connected to the first axis, and an upper casing and a lower casing, and the second casing is orthogonal to the first axis. A second hinge part rotatably connected by a shaft, a circuit board provided in the upper case, a long side part provided in the upper case, and a short side part connected to one end of the long side part An antenna element, and a power feeding unit provided on a circuit board that feeds power from the tip side of the short side of the antenna element. The upper casing has two long sides facing each other, two short sides facing each other, and four corners where the long side and the short side intersect, and the first hinge portion is close to the short side. The first corner which is one of the four corners is a corner on the side where the second hinge portion is located on the short side where the first hinge portion is located, and the antenna. The element is arranged at the second corner farthest from the first corner among the four corners.
A portable wireless device according to another embodiment of the present invention includes a lower casing, an upper casing that is rotatably attached to two lower axes that are orthogonal to each other, and an upper casing. Electric power is supplied from the provided circuit board, an antenna element having a long side provided in the upper housing and a short side connected to one end of the long side, and a tip side of the short side of the antenna element. And a power feeding unit provided on the circuit board. The upper housing has two long sides facing each other, two short sides facing each other, and four corners where the long side and the short side intersect, and one of the two rotation axes is the upper housing. The other axis is arranged substantially coincident with the short side of the upper housing, and the intersection of the two axes is located at the first corner of the four corners. The antenna element is disposed at the second corner farthest from the first corner among the four corners.

  According to the present invention, it is possible to prevent deterioration of antenna characteristics by disposing an antenna element capable of transmitting and receiving both main polarization and cross polarization in the upper casing away from the casing ground portion.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
1 to 3 are plan views of portable radio apparatus 100 according to Embodiment 1 of the present invention. 1 and 3 show the portable wireless device 100 in an opened state, and FIG. 2 shows the portable wireless device 100 in a folded state.

  The mobile wireless device 100 includes three housings, a first housing 101 (lower housing), a second housing 102 (upper housing), and a third housing 103. The first case 104 and the second case 104 are arranged so that the first hinge portion 104 is changed from the opened state of FIG. 1 to the folded state of FIG. 2 or from the folded state of FIG. 2 to the opened state of FIG. 102 and the third housing 103 are rotatably connected. The second hinge part 105 and the third casing are arranged so that the second hinge part 105 is changed from the opened state of FIG. 3 to the folded state of FIG. 2 or from the folded state of FIG. 2 to the opened state of FIG. 103 is rotatably connected. In other words, the second casing 102 can be opened in two different directions perpendicular to each other (upward direction in FIGS. 1 to 3 (longitudinal direction of the first casing 101) and right direction), and the first casing 102 can be opened. It is attached to the first housing 101 via the third housing 103 so as to be foldable so as to overlap the body 101. The second hinge unit 105 is moved together with the second casing 102 and the third casing 103 when the second casing 102 and the third casing 103 are rotated about the first hinge unit 104 as a rotation axis. It can be rotated.

  The first housing 101 has a rectangular shape in plan view, and is exposed to the outside with the portable wireless device 100 opened, and has an operation surface (not shown) that is operated during a call or the like. The first casing 101 has a conductive casing ground portion 111 inside. Here, the housing ground portion is a ground pattern (having a ground potential) configured on the circuit board or a conductive member (having a ground potential) connected to the ground pattern configured on the circuit board. It is.

  The second housing 102 has a rectangular shape in plan view, and has an antenna element 112 and a circuit board 113 inside, and a display unit 114 that is exposed to the outside when the portable wireless device 100 is opened. The circuit board 113 has a conductive circuit pattern formed on a plane portion, and the conductive pattern and the display unit 114 are electrically and mechanically connected by connecting the conductive terminal of the display unit 114 to the circuit pattern. Connected. The display unit 114 is, for example, an LCD, and is placed on a flat surface part of the circuit board 113 on which the conductive pattern is formed, and displays an image of received image data. In addition, the display unit 114 faces the operation surface of the first housing 101 on the inner side in a state where the portable wireless device 100 of FIG. 2 is folded. The display unit 114 displays an image in a direction parallel to the direction in which the second housing 102 is opened. Specifically, the display unit 114 displays an image in a direction parallel to the upward direction (up and down direction in FIG. 1) when opened in the upward direction in FIG. 1, and in a state opened in the right direction in FIG. The image is displayed in a direction parallel to the right direction (left and right direction in FIG. 3).

  The antenna element 112 is formed, for example, by pressing a conductive metal plate, and is formed in an L shape in plan view. The antenna element 112 is disposed on the circuit board 113 in the upper left corner 102a in FIG. 1 among the four corners 102a to 102d of the second housing 102. In addition, the short side portion 112a of the antenna element 112 is disposed along the upper side wall 117 of the second casing 102, and the antenna element 112 is arranged along the left side wall 116 perpendicularly intersecting the upper side wall 117 and the corner portion 118. The long side portion 112b is disposed. The antenna element 112 is positioned by the left side wall 116 and the upper side wall 117 of the second housing 102. On the circuit board 113, a power feeding unit 115 that is electrically connected to the antenna element 112 and feeds power to the antenna element 112 is provided. In FIG. 1, the first hinge portion 104, the second hinge portion 105, the housing ground portion 111, the antenna element 112, the circuit board 113, and the power feeding portion 115 are the first housing 101, the second housing 102, or the second housing 102. Since it is housed inside the three housings 103, it cannot actually be visually recognized from the outside.

  FIG. 4 is a plan view of the antenna element 112. As shown in FIG. 4, the antenna element 112 has a short side portion 112a and a long side portion 112b, and is formed in an L shape in plan view. The short side portion 112a extends integrally from the long side portion 112b and from one end of the long side portion 112b in a direction (left and right direction in FIG. 4) orthogonal to the longitudinal direction (vertical direction in FIG. 4) of the long side portion 112b. To form. The antenna element 112 is fed from the feeding portion 115 from the distal end side 401 of the short side portion 112a.

  FIG. 5 is a diagram showing a current distribution of the antenna element 112. As shown in FIG. 5, when the antenna element 112 is fed from the tip side 401 of the short side portion 112a, the sum S1 of current values on the long side portion 112b and the sum S2 of current values on the short side portion 112a are substantially equal. The electrical length of each of the long side portion 112b and the short side portion 112a is determined so as to have a current distribution (S1≈S2). For example, if the antenna element length is a quarter wavelength, the current distribution in the antenna element 112 is a sine distribution with a quarter wavelength, so the sum of the current values on the short side portion 112a and the long side In order to make the sum of the current values on the part 112b equal, for example, the ratio of the electrical lengths of the short side part 112a and the long side part 112b is set to 1: 2. Further, since the current distribution on the antenna element is dominant in the radiation, the radiation amounts from the short side and the long side are the same.

  In addition, the antenna element 112 is formed in an L shape so that, depending on the usage state of the wireless communication device 100, when the long side portion 112b transmits and receives the main polarization, the short side portion 112a transmits and receives the cross polarization. However, when the long side portion 112b transmits and receives the cross polarization, the short side portion 112a transmits and receives the main polarization.

  FIG. 6 is a side view of the housing ground portion 111 and the circuit board 601 when the housing ground portion 111 and the circuit board 601 are arranged in the first housing 101. As shown in FIG. 6, the housing ground portion 111 is a thin metal plate having conductivity, and is disposed under the circuit board 601 and almost on the entire surface of the first housing 101. The circuit board 601 is formed by stacking an insulating portion 602 and a contact portion 603. In addition, a connection terminal of an electronic component 604 such as a CPU is soldered to the contact portion 603, and the circuit board 601 and the electronic component 604 are electrically and mechanically connected. In addition, as shown in FIG. 6, the flat portion of the housing ground portion 111 is not limited to the case where the flat portion of the housing ground portion 111 and the bottom surface portion of the circuit board 601 are in contact with each other in the first housing 101. And the bottom of the circuit board 601 may be separated from each other and placed in the first housing 101.

  Next, the operation of the portable wireless device 100 will be described with reference to FIGS.

  When a user views a call or an image displayed on the display unit 114, the user places the portable wireless device 100 in the open state of FIG. That is, by rotating the second housing 102 so as to open upward (upward in FIG. 2) from the folded state of FIG. Will be open. In the state of FIG. 1, for example, in a system in which the main polarization is horizontal polarization, the short side portion 112a of the antenna element 112 transmits and receives horizontal polarization that is the main polarization, and the long side portion 112b is cross-polarization. Transmit and receive vertically polarized waves. Further, in the open state of FIG. 1, the antenna element 112 is located in the corner portion 102 a farthest from the housing ground portion 111 among the corner portions 102 a to 102 d, so that electromagnetic wave radiation from the antenna element 112 is performed. Can be prevented from being obstructed by the housing ground portion 111. Further, in the opened state of FIG. 1, the antenna element 112 is disposed at the corner portion 102 a of the second housing 102 farthest from the second hinge portion 105.

  Further, when viewing the image displayed on the display unit 114, the user can also set the portable wireless device 100 in the open state of FIG. That is, by rotating the second housing 102 so as to open in the right direction (right direction in FIG. 2) from the folded state in FIG. Will be open. In the state of FIG. 3, for example, the long side portion 112b of the antenna element 112 transmits and receives horizontal polarization, which is the main polarization, and the short side portion 112a transmits and receives vertical polarization, which is the cross polarization. Further, in the open state of FIG. 3, the antenna element 112 is located at the corner 102 a farthest from the housing ground portion 111 among the corners 102 a to 102 d, so that the electromagnetic wave radiation from the antenna element 112 is emitted. Can be prevented from being obstructed by the housing ground portion 111. Further, in the opened state of FIG. 3, the antenna element 112 is disposed at the corner 102 a of the second housing 102 farthest from the first hinge portion 104 and the second hinge portion 105. In the opened state of FIG. 3, the corner 102d is farthest from the housing ground portion 111 among the corners 102a to 102d, like the corner 102a. However, in the opened state of FIG. It is closer to the housing ground part 111 than. Therefore, in the present embodiment, the antenna element 112 is disposed in the corner portion 102a.

  When the mobile wireless device 100 receives an incoming call while displaying an image on the display unit 114 in the open state of FIG. 3, the user temporarily places the mobile wireless device 100 in the folded state of FIG. Make a call with the phone open.

  When making a call in the open state of FIG. 1, the user holds the first casing 101 in his hand and collects sound collected by a microphone through a call hole (not shown) provided in the first casing 101. Can be transmitted to the call partner, and the voice of the communication partner can be heard from the speaker through a call hole (not shown) provided in the second housing 102. When viewing the image displayed on the display unit 114 in the opened state of FIG. 1, the user views the image displayed on the display unit 114 while holding the first housing 101 in his / her hand. be able to.

  On the other hand, when viewing the image displayed on the display unit 114 in the opened state of FIG. 3, the user places the portable wireless device 100 on a desk or the like and views the image displayed on the display unit 114. be able to.

  As described above, according to the present embodiment, the antenna element is arranged in the upper casing away from the casing ground portion, so that the antenna characteristics can be obtained in any state where the second casing is opened in two different directions. Can be prevented. Further, according to the present embodiment, by making the antenna element L-shaped, both main polarization and cross polarization can be transmitted and received with a simple configuration. In addition, according to the present embodiment, power is fed from the tip side of the short side of the antenna element, so that the transmission / reception performance in the short side and the long side of the antenna element can be made uniform. According to the present embodiment, the antenna element is formed in an L shape, and the antenna element is disposed along the L-shaped side wall of the second casing. It can be arranged compactly, can save space, and can facilitate the work of connecting the antenna element to the power feeding unit 115.

(Embodiment 2)
7 and 8 are plan views of portable radio apparatus 700 according to Embodiment 2 of the present invention. 7 and 8 show the portable wireless device 700 in an open state. 7 and 8, parts having the same configuration as in FIGS. 1 to 3 are denoted by the same reference numerals and description thereof is omitted. 7 and 8, the housing ground portion 111, the antenna element 112, the circuit board 113, and the power feeding portion 115 are housed inside the first housing 701 or the second housing 702. Cannot be seen.

  As shown in FIG. 7, the portable wireless device 700 includes two housings, a first housing 701 (lower housing) and a second housing 702 (upper housing). The second housing 702 can be rotated clockwise and counterclockwise on the plane parallel to the paper surface of FIG. 7 with the connecting portion 703 as a rotation axis, and is folded so as to overlap the first housing 701. It is freely attached to the first housing 701. That is, the second housing 702 can be opened in two different directions (upward and rightward in FIGS. 7 and 8) perpendicular to each other, and can be folded so as to overlap the first housing 701. One housing 701 is attached.

  The first housing 701 is exposed to the outside with the portable wireless device 700 open, and has an operation surface (not shown) that is operated during a call or the like. The first housing 701 has a housing ground portion 111 inside. Note that the positional relationship between the housing ground portion 111 provided in the first housing 701 and the circuit board is the same as that in FIG.

  The second housing 702 includes the antenna element 112 and the circuit board 113 inside, and the display unit 114 exposed to the outside in a state where the portable wireless device 700 is opened. The display unit 114 is an LCD, for example, and displays an image of the received image data. In addition, the display unit 114 faces the operation surface of the first housing 701 on the inner side when the portable wireless device 700 is closed. The display unit 114 always displays an image in the same direction regardless of the opening direction of the second housing 702. Specifically, the display unit 114 extends in the vertical direction of FIGS. 7 and 8 in both the state where the second housing 702 is opened upward in FIG. 7 and the state where the second housing 702 is opened rightward in FIG. Display an image.

  In addition, the short side portion 112a of the antenna element 112 is disposed along the upper side wall 705 of the second housing 702, and the antenna element 112 is disposed along the left side wall 704 perpendicularly intersecting the upper side wall 705 and the corner portion 706. The long side portion 112b is disposed. The antenna element 112 is positioned by the left side wall 704 and the upper side wall 705 of the second housing 702. 7 and 8, the housing ground portion 111, the antenna element 112, the circuit board 113, and the power feeding portion 115 are housed inside the first housing 701 or the second housing 702. Cannot be seen.

  Next, the operation of the portable wireless device 700 will be described using FIG. 7 and FIG.

  The portable wireless device 700 is in the open state of FIG. 7 when calling or displaying an image on the display unit 114. That is, the portable wireless device 700 is rotated from the folded state (not shown) with the connecting portion 703 as a rotation axis so as to open the second housing 702 upward (upward in FIG. 7). Opened. In the open state of FIG. 7, for example, in a system in which the main polarization is horizontal polarization, the short side portion 112a of the antenna element 112 transmits and receives horizontal polarization, which is the main polarization, and the long side portion 112b is cross-polarized. Transmits and receives vertically polarized waves. Further, in the open state of FIG. 7, the antenna element 112 is located at the corner 702a farthest from the housing ground portion 111 among the corners 702a to 702d. Can be prevented from being disturbed. Further, in the open state of FIG. 7, the antenna element 112 is disposed at the corner 102 a of the second housing 102 farthest from the connecting portion 703.

  Also, the portable wireless device 700 is in the open state of FIG. 8 when displaying an image on the display unit 114. That is, the portable wireless device 700 rotates the second housing 702 clockwise on the horizontal plane (the plane parallel to the paper surface of FIG. 7) from the state of FIG. It becomes a state. In addition, the portable wireless device 700 performs the operation of opening the second housing 702 and the rotating operation in parallel from the closed state (not shown) with the connecting portion 703 as the rotation axis, thereby achieving the state of FIG. . In the state of FIG. 8, for example, the long side portion 112b of the antenna element 112 transmits and receives horizontal polarization, which is the main polarization, and the short side portion 112a transmits and receives vertical polarization, which is the cross polarization. Further, in the open state of FIG. 8, the antenna element 112 is located at the corner 702a farthest from the housing ground portion 111 among the corners 702a to 702d. Can be prevented from being disturbed. Further, in the opened state of FIG. 8, the antenna element 112 is disposed at the corner portion 102 a of the second housing 102 farthest from the connecting portion 703. In the opened state of FIG. 7, the corner 702b is farthest from the housing ground portion 111 in the corners 702a to 702d, like the corner 702a. However, in the opened state of FIG. It is closer to the housing ground part 111 than. Therefore, in this embodiment mode, the antenna element 112 is disposed in the corner portion 702a.

  When making a call in the open state of FIG. 7, the user holds the first casing 701 in his hand and collects sound collected by a microphone through a call hole (not shown) provided in the first casing 701. Can be transmitted to the other party, and the voice of the other party can be heard from the speaker through a communication hole (not shown) provided in the second housing 702. Further, when viewing the image displayed on the display unit 114 in the opened state of FIG. 7, the user views the image displayed on the display unit 114 while holding the first housing 701 in his / her hand. be able to. Further, when viewing the image displayed on the display unit 114 in the opened state of FIG. 8, the user views the image displayed on the display unit 114 while holding the first housing 701 in his / her hand. be able to.

  As described above, according to the present embodiment, the antenna element is arranged in the second casing apart from the casing ground portion, so that the antenna can be opened in any state in which the second casing is opened in two different directions. It is possible to prevent deterioration of characteristics. Further, according to the present embodiment, by making the antenna element L-shaped, both main polarization and cross polarization can be transmitted and received with a simple configuration. In addition, according to the present embodiment, power is fed from the tip side of the short side of the antenna element, so that the transmission / reception performance in the short side and the long side of the antenna element can be made uniform. According to the present embodiment, the antenna element is formed in an L shape, and the antenna element is disposed along the L-shaped side wall of the second casing. It can be arranged compactly, can save space, and can facilitate the work of connecting the antenna element to the power feeding unit 115.

  In this embodiment, when viewing the image displayed on the display unit 114, the second housing 702 is rotated 90 degrees clockwise from the state of FIG. 7 to the state of FIG. The embodiment is not limited to this, and the second housing 702 may be rotated 90 degrees counterclockwise from the state of FIG. In this case, when the antenna element is arranged at the corner 702b among the corners 702a to 702d of the second housing 702, the antenna element is most distant from the housing ground portion 111 in a state where the second housing is opened. Leave. Therefore, in this case, the antenna element 112 is disposed at the corner 702 b of the second housing 702.

  In the first embodiment and the second embodiment, the overall shape of the antenna element is L-shaped. However, the present invention is not limited to this, and the long side extends in a direction different from the longitudinal direction of the long side portion. The antenna element can have any shape as long as it has a short side extending from one end of the portion. For example, as shown in FIG. 9, the antenna element may have an inverted seven-letter shape. 9 includes a long side portion 901, a short side portion 902 extending integrally with the long side portion 901 in a direction perpendicular to the longitudinal direction of the long side portion 901, and a tip portion 903 of the short side portion 902. It comprises a tip piece 904 bent in the longitudinal direction of the long side 901 and perpendicularly to the same direction as the long side 901. In this case, the antenna element 900 is fed from the distal end portion 905 of the distal end piece portion 904. Moreover, in the said Embodiment 1 and Embodiment 2, although it was set as the state opened in two different directions, this invention is not restricted to this, The 2nd housing | casing can take the arbitrary open states. At that time, the antenna element is arranged at the corner of the second housing farthest from the housing ground portion.

  The portable wireless device according to the present invention is particularly suitable for performing communication in a state where the housing is opened from the folded state.

Plan view of portable radio apparatus according to Embodiment 1 of the present invention Plan view of portable radio apparatus according to Embodiment 1 of the present invention Plan view of portable radio apparatus according to Embodiment 1 of the present invention The top view of the antenna element which concerns on Embodiment 1 of this invention The figure which shows the electric current distribution of the antenna element which concerns on Embodiment 1 of this invention Side view of housing ground part and circuit board according to Embodiment 1 of the present invention Plan view of portable radio apparatus according to Embodiment 2 of the present invention Plan view of portable radio apparatus according to Embodiment 2 of the present invention Plan view of antenna element

Explanation of symbols

DESCRIPTION OF SYMBOLS 100,700 Portable radio | wireless apparatus 101,701 1st housing | casing 102,702 2nd housing | casing 103 3rd housing | casing 104 1st hinge part 105 2nd hinge part 111 Housing | casing ground part 113 Circuit board 112 Antenna element 114 Display part 115 Feeding part

Claims (5)

An upper housing;
A lower housing,
A first hinge portion provided between the upper casing and the lower casing, and rotatably connecting the upper casing and the lower casing about a first axis;
The second casing is provided between the upper casing and the lower casing and rotatably connects the upper casing and the lower casing with a second axis orthogonal to the first axis. A hinge part;
A circuit board provided in the upper housing;
An antenna element having a long side provided in the upper housing and a short side connected to one end of the long side;
A power feeding unit provided on the circuit board that feeds power from a tip side of the short side portion of the antenna element, and a portable wireless device comprising:
The upper housing has two long sides facing each other, two short sides facing each other, and four corners where the long side and the short side intersect,
The first hinge portion is disposed close to the short side,
The first corner, which is one of the four corners, is the corner on the side where the second hinge portion is located on the short side on the side where the first hinge portion is located,
The antenna element is a portable wireless device arranged at a second corner farthest from the first corner among the four corners. A lower housing,
An upper housing rotatably attached to the lower housing with two axes orthogonal to each other as rotation axes;
A circuit board provided in the upper housing;
An antenna element having a long side provided in the upper housing and a short side connected to one end of the long side;
A portable wireless device comprising: a power feeding unit provided on the circuit board that feeds power from a tip side of the short side portion of the antenna element;
The upper housing has two long sides facing each other, two short sides facing each other, and four corners where the long side and the short side intersect,
One axis of the two rotation shafts is arranged substantially coincident with the long side of the upper casing, and the other axis is arranged substantially coincident with the short side of the upper casing, the two axes Is located at the first of the four corners,
The antenna element is a portable wireless device arranged at a second corner farthest from the first corner among the four corners. The ratio of the electrical length of the long side portion and the electrical length of the short side portion of the antenna element is the sum of current values on the long side portion and the sum of current values on the short side portion. The portable radio apparatus according to claim 1, wherein the portable radio apparatuses are designed to be substantially equal to each other. The ratio of the electrical length of the long side portion to the electrical length of the short side portion is approximately 2: 1 when the electrical length of the antenna element is approximately λ / 4. The portable wireless device according to 3. A display unit provided on the upper housing;
When the upper casing is opened so that the long side of the upper casing and the long side of the lower casing are in a substantially straight line from the folded state, the display section has the length of the upper casing. When the image is displayed with the side extending in the vertical direction, and the upper case is opened so that the short side of the upper case and the short side of the lower case are substantially aligned from the folded state. The portable wireless device according to claim 1, wherein an image is displayed with a direction in which the short side of the upper casing extends in a vertical direction.

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