JP2009111897A - Portable wireless device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable wireless device wherein cases are openable/closable in two directions and influence of a hinge section to antenna is effectively suppressed. <P>SOLUTION: In the portable wireless device, a lateral hinge section 5 is composed of: a lateral hinge ankle 52 which is arranged in an upper case 1; a lateral hinge plate 53 which is arranged in a hinge case 3 and contains a conductive material; and a first hinge shaft 51, which electrically connects the lateral hinge ankle 52 with the lateral hinge plate 53, is arranged between a substantially center portion in a longitudinal direction and an end section of a surface where the upper case 1 and the hinge case 3 face each other in a direction of a second shaft core A2, and contains a conductive material. An insulating member 6A is provided between the lateral hinge ankle and a first metal section 14. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a portable wireless device in which two casings are openable and closable in two vertical and horizontal directions, that is, connected by a hinge portion that can be opened vertically and horizontally, and is hinged particularly when used in a vertically opened state. The present invention relates to a portable radio apparatus that can effectively suppress the influence of a unit on an antenna.

Recently, portable wireless devices such as mobile phones have become widespread, and various types of portable wireless devices have been developed as is well known (see, for example, Patent Document 1).
That is, in the portable wireless device 100 shown in FIG. 10A, the upper and lower casings 101 and 102 are connected by the biaxial hinge portions (vertical hinge shaft and horizontal hinge shaft not shown) provided on the support member 103. Yes. Specifically, as shown in FIG. 5B, the upper and lower casings 101 and 102 are arranged in the BC plane direction around the horizontal hinge shaft 104A provided in the width direction on the upper end side of the lower casing 102. In addition to being openable and closable, the support member 103 at the center on the upper end side of the lower casing 102 is rotatable about a vertical hinge shaft 104B provided on the lower casing 102 as a rotation center.

In addition to such a biaxial opening / closing method (hereinafter referred to as “biaxial opening / closing method”), a method having a casing that can be opened and closed in two directions (hereinafter referred to as “bidirectional opening / closing method”). Has also been proposed (see, for example, Patent Document 2).
That is, as shown in FIG. 11A, the portable wireless device 200 includes an upper housing 201, a lower housing 202, and a first wireless device 200 attached to the upper housing 201 in a lockable state with respect to the lower housing 202. 1 hinge shaft 203, and a second hinge shaft 204 orthogonal to the first hinge shaft 203 attached to the lower housing 202 in a lockable state with respect to the upper housing 201. .

The portable wireless device 200 having such a configuration is such that the upper hinge 201 and the lower housing 202 shown in FIG. 11A are closed, and the first hinge shaft 203 side lock shown in FIG. By pushing the claw 203A into the lock hole 202A on the lower housing 202 side and locking it, the upper housing 201 can be opened and closed (vertically opened) in the vertical (B) direction (see FIG. 5B). Further, the portable wireless device 200 is configured so that the lower casing 202 is locked by pushing the lock claw 201A on the upper casing 201 side shown in FIG. 5B into the lock hole 204A on the second hinge shaft 204 side. It can be opened and closed (side-opened) in the horizontal (A) direction (see FIG. 4C).
JP 2004-165826 A JP 2003-60759 A

  By the way, in the former two-axis open / close portable wireless device 100 shown in FIG. 10, the length of the metal vertical hinge shaft 104B provided in the upper housing 101 is very small, so that it corresponds to the frequency band to be used. Unnecessary resonance frequency is not often generated. However, in the latter two-way opening / closing portable radio apparatus 200 shown in FIG. 11, the length of the first metal hinge shaft 203 inside the upper casing 201 can resonate with the wavelength of the frequency band to be used. Therefore, there is a possibility that the adverse effect of the hinge part on the antenna cannot be ignored.

  The present invention has been made in view of the above circumstances, and in a type having a casing of a system that opens and closes in two directions (vertical and horizontal) (a two-way opening and closing system), the portable unit that can suppress the influence of the hinge on the antenna. An object is to provide a wireless device.

  The portable wireless device of the present invention includes a first casing, a first circuit board and a first metal part provided in the first casing, a second casing, and the second casing. A second circuit board provided; an antenna element provided in the second casing; a power feeding unit for feeding power to the antenna element from the second circuit board; the first casing; and the second casing. A third housing provided between the housing, a first hinge portion that connects the first housing and the third housing so as to be rotatable about a first axis; and A second hinge portion for connecting the second housing and the third housing so as to be rotatable about a second axis perpendicular to the first axis; the first circuit board; A cable for electrically connecting the two circuit boards, wherein the first hinge portion is disposed in the first housing, and the first housing portion is disposed in the third housing. A second holding part disposed opposite to the antenna element and containing a conductive material; electrically connecting the first holding part and the second holding part; and The third casing is configured by a first hinge shaft including a conductive material disposed between a substantially central portion and an end portion in a longitudinal direction of a surface facing the second axial direction. An insulating material is provided between the holding portion and the first metal portion.

  According to the above configuration, in the type including the two-way opening / closing type housing, it is possible to effectively suppress the adverse effect of the first hinge portion on the antenna due to unnecessary resonance.

  Moreover, it has a means to adjust the high-frequency electrical connection state between the first holding part and the first metal part. According to the above configuration, high-frequency high load is applied to insulate, so that the more reliable insulation can further prevent the occurrence of unnecessary resonance.

  The means for adjusting the electrical connection state is a reactance element. According to the above configuration, similarly, since the insulation is performed by applying a high-frequency high load, the insulation can be made more reliable and the occurrence of unnecessary resonance can be surely prevented.

  According to the present invention, the first casing, the first circuit board and the first metal part provided in the first casing, the second casing, and the second casing are provided. A second circuit board; an antenna element provided in the second casing; a power feeding unit for feeding power to the antenna element from the second circuit board; the first casing; and the second casing. A first hinge portion that connects the first housing and the third housing so as to be rotatable about a first axis, and the second housing. A second hinge portion for connecting the housing and the third housing so as to be rotatable about a second axis perpendicular to the first axis, the first circuit board, and the second A cable for electrically connecting a circuit board, wherein the first hinge part is a first holding part disposed in the first casing, and the antenna is provided in the third casing. A second holding portion disposed opposite to the child and containing a conductive material; electrically connecting the first holding portion and the second holding portion; and the first housing and the first holding portion. 3 includes a first hinge shaft including a conductive material disposed between a substantially center and an end in a longitudinal direction of a surface facing the second axial direction. Since there is an insulating material between the holding part and the first metal part, the hinge part, particularly the first hinge part, has an adverse effect on the antenna due to unnecessary resonance in the type having a two-way opening / closing type housing. A portable wireless device that can be effectively suppressed can be provided.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
(First embodiment)
FIG. 1 to FIG. 3 show a mobile phone 10 which is a kind of mobile radio apparatus of the present invention. This mobile phone includes an upper housing 1 and a second housing constituting a first housing. , A third casing (hereinafter referred to as a hinge casing 3) provided in the lower casing 2, and the upper casing 1 and the lower casing 2 as the second axis A2. A second hinge portion (hereinafter, referred to as a longitudinal opening hinge portion) 4 that is connected so as to be rotatable (vertically opened) in the Y (vertical) direction (see FIG. 2) along the upper casing 1 and the lower casing 2. A first hinge part (hereinafter referred to as a laterally opening hinge part) that is connected to be rotatable (laterally open) in the X (lateral) direction along the first axial center A1 orthogonal to the second axial center A2. 5 (see FIG. 4) and an insulating material (hereinafter referred to as an insulating member) 6A (see FIG. 5) provided inside the upper casing 1.

  In FIG. 2, the upper housing 1 includes a liquid crystal display unit 11 and a receiver unit 12 on an inner surface (that is, referred to as an upper closing surface) 1A to be closed with the lower housing 2, and the upper housing 1 shown in FIG. Inside, an upper printed circuit board 13 which is a first circuit board and a first metal part 14 are provided. Here, the first metal portion 14 is provided to increase the strength of the thinned upper housing 1 and is formed of a metal plate. As shown in FIG. A printed circuit board 13 is attached. Here, the 1st metal part 14 is electrically connected with the upper printed circuit board (upper printed circuit board GND) 13, and comprises the ground plane.

  Hereinafter, in this upper housing 1, one of the two short side surfaces 1B shown in FIG. 2, that is, the side surface facing the hinge housing 3 when the upper housing 1 is opened vertically is hinged. It will be referred to as a housing facing side surface 1B-1.

  The lower housing 2 includes an operation unit 21 and a transmission unit 22 on an inner surface (hereinafter referred to as a lower closing surface) 2A to be closed with the upper housing 1 in FIG. 3, and the lower housing 2 illustrated in FIG. Inside, a lower printed circuit board 23 as a second circuit board, a power feeding unit 24, and an antenna element 25 are provided. Note that the cellular phone 10 of this embodiment uses the 800 MHz band as the operating frequency (f), but the antenna element 25 uses an inverted F antenna having an electrical length of λ / 4 (λ: frequency wavelength at f). The electrical length of the antenna element 25 may be λ / 8, 3λ / 8, 5λ / 8,.

  The hinge housing 3 is installed at one end of the lower housing 2 in the long side direction (the end in the + Y direction in FIG. 2). As shown in FIGS. 2 and 3, the hinge housing 3 has a second hinge shaft (hereinafter referred to as a longitudinal hinge shaft) as a longitudinal opening hinge portion 4 that is pivotably connected to the lower housing 2. 41) is attached.

  2 and 4, the hinge housing 3 has a first hinge shaft (hereinafter referred to as a lateral opening hinge) as a lateral opening hinge portion 5 that is rotatably connected to the upper housing 1 in FIGS. A shaft 51) is attached.

  As shown in FIG. 2, the vertical opening hinge 4 is configured such that the upper casing 1 is connected to the lower casing 2 via the vertical opening hinge shaft 41 (provided inside the hinge casing 3). It is connected so as to be rotatable in the longitudinal (Y) direction, and a substantially cylindrical metal is used for the longitudinal opening hinge shaft 41 of the present embodiment.

  As shown in FIG. 3, the laterally opening hinge unit 5 is configured such that the upper casing 1 is connected to the lower casing 2 via a laterally opening hinge shaft 51 (see FIG. 4) (provided inside the hinge casing 3). 4 and the first holding portion (hereinafter referred to as “the first holding portion” disposed inside the upper housing 1 in FIG. 4). , A horizontal hinge ankle) 52 and a second holding portion (hereinafter referred to as a horizontal hinge plate) 53 disposed inside the hinge housing 3.

  Here, the horizontal hinge ankle 52 (particularly from the front end portion 14A of the first metal portion 14 or the front end portion 13A of the printed circuit board 13 − which is a metal portion that may affect the antenna element 25 of the horizontal hinge portion 5 − Y-direction projecting portion), lateral opening hinge shaft 51 (the length in the Y direction that is the first axis A1 direction), and lateral hinge plate 53 (the length in the X direction) It will be called “three-point metal part”. These three-point metal parts are made of a conductive material and are electrically connected to each other as will be described later, but are not electrically connected to the upper printed circuit board 13 in the upper housing 1. It is composed.

  Of these, the side opening hinge shaft 51 will be described in the hinge housing 3 in the state of FIG. 2. The side surface facing the hinge housing facing side surface 1B-1 of the upper housing 1 (hereinafter referred to as the upper housing facing side surface). 4B) an end portion (or near the end portion) opposite to the end portion (the left end portion in FIG. 2) on the side where the vertical opening hinge shaft 41 is installed, and on the upper housing 1 side And the hinge housing facing side surface 1B-1.

  The laterally opening hinge shaft 51 of the present embodiment is formed in a hollow and substantially cylindrical shape in FIG. 4, and a wiring cable (FPC (Flexible Printed Circuit) (not shown) is disposed inside the laterally opening hinge shaft 51. ) May be inserted, and the liquid crystal display unit 11 and the like are connected to the power supply side of the lower housing 2.

  On the other hand, the horizontal hinge ankle 52 rotates when the upper casing 1 is rotated in the vertical (Y) direction with respect to the hinge casing 3 (lower casing 2) (see FIG. 4) and in the horizontal (X) direction. When moved (see FIG. 6), the upper casing 1 is held in a stable state. The lateral hinge ankle 52 is formed of a metal having a required strength and is installed inside the upper housing 1, and one end thereof is attached to the laterally opening hinge shaft 51. As shown in FIG. 4, the lateral hinge ankle 52 partially protrudes from the distal end portion 14 </ b> A of the first metal portion 14 in the Y direction toward the hinge housing 3.

As described above, the horizontal hinge ankle 52 passes through a part of the first metal portion 14 made of a metal plate and is fixed to the upper housing 1 by screwing. Although not shown, the upper printed circuit board 13 is attached to the portion 14 as described above. In addition, the large hole 14A for letting a screw pass is opened in the first metal part 14 of the present embodiment, and is kept in a non-conductive state with respect to the screw. Also. This screw is tightened before the liquid crystal display unit 11 is fitted into the upper housing 1.
Therefore, in the case of such a configuration, in order to prevent unnecessary resonance due to high frequency current flowing into the horizontal hinge ankle 52 from the upper printed circuit board 13 side with respect to the first metal portion 14, the horizontal hinge ankle 52 is It is fixed to the first metal part 14 via the insulating member 6 and is electrically insulated from the first metal part 14 and the upper printed circuit board 13.

  In the case of this embodiment, the insulating member 6 is prepared by integrating a member different from the upper casing 1, and is made of an insulating material such as ABS resin (Acrylonitrile Butadiene Styrene). polymer; acrylonitrile, butadiene, styrene resin) or the like, and the minimum necessary thickness (t) shown in FIG. 5 is used. Further, the insulating member 6A of the present embodiment is fixed in a state of being embedded in the upper casing 1 by, for example, insert molding or the like in order to be integrated with a part of the upper casing 1. The insulating member of the present invention is not limited to the configuration of the present embodiment, and for example, an insulating sheet interposed between the lateral hinge ankle 52 and the first metal part 14 or the first metal part. The lateral hinge ankle 52 and the first metal part 14 may be insulated from each other by using an oxide film or the like formed around the periphery of the base 14.

  Similar to the horizontal hinge ankle 52, the horizontal hinge plate 53 is used when the upper casing 1 is rotated in the horizontal (X) direction and the vertical (Y) direction with respect to the hinge casing 3 (lower casing 2). The housing 1 is held in a stable state and is rotatably connected. The horizontal hinge plate 53 of the present embodiment is disposed inside the hinge housing 3 in a state in which the horizontal hinge plate 53 can be rotated with respect to the laterally opening hinge shaft 51 and is opposed to the antenna element 25 (see FIG. 4). ing.

  By the way, in the horizontal hinge part 5, when the vertically opened state as shown in FIG. 2, the total value of the electrical path lengths of the three-point metal parts with respect to the adjacent antenna element 25 is If the length is a constant multiple, the antenna element 25 may be unnecessarily resonant. However, in this embodiment, as described above, the lateral hinge ankle 52 shown in FIG. 5 is screwed to the first metal part 14 via the insulating member 6, and the first metal part 14 and the upper printed circuit board 13 are secured. Insulated from.

  Therefore, even if the electrical path length of the three-point metal part is formed to a length that matches the resonance frequency with respect to the antenna element 25, it is electrically connected to the first metal part 14 and the upper printed circuit board 13 that are ground planes. Therefore, resonance with the antenna element 25 can be avoided, and generation of a current component having a phase opposite to that of the antenna element 25 can be prevented.

  That is, this is because the three-point metal part resonates within the antenna use band, and the influence is when the antenna protrudes a specific length (λ / 8) from the ground plane of the antenna (reference where the electric potential is 0). This is because, at this time, the three-point metal part works like a ground wire. Normally, the ground wire is installed so as to be in phase with the antenna from the ground in the vicinity of the antenna feeding portion. However, in the case of the present invention, the phase is opposite to the antenna current (referred to as a vector in FIG. 7) And ←) current is generated in the three-point metal part (particularly the hinge plate). Therefore, in order to suppress the occurrence of this reverse-phase current, the present invention separates the ground and the three-point metal part.

  Therefore, when the cellular phone 10 according to the present embodiment is used with the upper housing 1 vertically opened as shown in FIG. 2, the overall shape of the three-point metal part is an antenna element as shown in FIG. Even if the L-shape of 25 is a substantially L-shape arrangement that is substantially point-symmetric with respect to the 180-degree reverse direction (however, the lateral hinge ankle 52 is only in the Y direction), as described above, The hinge ankle 52 is screwed to the first metal part 14 via the insulating member 6 and is insulated from the first metal part 14 and the upper printed board 13. Therefore, high-frequency current can be prevented from flowing into the lateral hinge ankle 52 via the wiring cable 26. Therefore, since it is possible to avoid the generation of high-frequency vibration in the three-point metal part, it is possible to effectively suppress the deterioration of the characteristics of the antenna element 25.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. In the present embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals to avoid redundant description.
7 and 8 show the main part of the mobile phone 20 according to the second embodiment of the present invention. The difference between the mobile phone 20 and the mobile phone 10 of the first embodiment is that the insulating member 6 is the same. As described above, the high-frequency electrical connection state is adjusted between the lateral hinge ankle 52 which is the first holding portion and the first metal portion 14 insulated by the insulating member 6B (described later) instead of the insulating member 6A. It is a point having a means 7 (this is called an adjusting means).

The insulating member 6 </ b> B of the present embodiment is made of an appropriate insulating sheet, and this insulating sheet is disposed so as to be laminated between the first metal portion 14 and the lateral hinge ankle 52. In this case, as shown in FIG. 8A, the first metal portion 14 and the lateral hinge ankle 52 are disposed so as to overlap each other in the vertical direction, but the insulating member 6B is interposed therebetween. There is no problem because it is. That is, the insulating member 6 </ b> B is configured to overlap with the distal end side of the first metal portion 14 and the proximal end portion 52 </ b> A side of the lateral hinge ankle 52 in a state including these positions. In other words, this is because the capacitive coupling is easier in the case of the overlapping configuration. As a result, the reactance element for canceling out the C component due to capacitive coupling can sufficiently exhibit its action.
In addition, what was integrally molded with the upper housing | casing 1 with the resin material which has insulation like 1st Embodiment may be used.

  The adjusting means 7 is for ensuring the insulation between the lateral hinge ankle 52 and the first metal part 14. In other words, the adjusting means 7 applies a high-frequency high load. This is to ensure insulation between the lateral hinge ankle 52 and the first metal portion 14. The adjusting means 7 of the present invention is constituted by a reactance element loaded between the distal end portion side of the first metal portion 14 and the proximal end portion 52A side of the lateral hinge ankle 52 as shown in FIG. 8B. The horizontal hinge ankle 52 and the first metal part 14 (upper printed circuit board GND) are connected via a constant. A coil (inductor) L is used for the reactance element.

Therefore, according to the present embodiment, when the first metal portion 14 and the lateral hinge ankle 52 are arranged close to each other, even if the gap is insulated by the insulating member 6B, the equivalent is achieved. There is a risk that the capacitor (capacitor) C that is formed will be coupled at a high frequency.
Therefore, in this embodiment, since the coil L is loaded as described above, the coupling by the capacitor C in the antenna resonance band can be canceled by adjusting the constant. That is, as shown in FIG. 9 showing the frequency characteristics of the parallel LC, the impedance becomes high impedance (that is, equivalent to insulation) in the use band. In other words, the ground and the three-point metal part can be electrically separated from each other in order to suppress the generation of the reverse phase current at the three-point metal part. Therefore, the characteristic deterioration of the antenna element 25 can be effectively suppressed.

  The present invention is not limited to the embodiment described above, and can be implemented in various forms without departing from the gist of the present invention.

  The portable wireless device of the present invention includes a first casing, a first circuit board and a first metal part provided in the first casing, a second casing, and the second casing. A second circuit board provided; an antenna element provided in the second casing; a power feeding unit for feeding power to the antenna element from the second circuit board; the first casing; and the second casing. A third housing provided between the housing, a first hinge portion that connects the first housing and the third housing so as to be rotatable about a first axis; and A second hinge portion for connecting the second housing and the third housing so as to be rotatable about a second axis perpendicular to the first axis; the first circuit board; A cable for electrically connecting the two circuit boards, wherein the first hinge portion is disposed in the first housing, and the first housing portion is disposed in the third housing. A second holding part disposed opposite to the antenna element and containing a conductive material; electrically connecting the first holding part and the second holding part; and The third casing is configured by a first hinge shaft including a conductive material disposed between a substantially central portion and an end portion in a longitudinal direction of a surface facing the second axial direction. Since the insulating material is provided between the holding portion and the first metal portion, it is possible to suppress the influence of the first hinge portion on the antenna, and in the type having a two-way opening / closing type housing, the hinge portion Has an effect of suppressing the influence of the antenna on the antenna, and is useful for a mobile phone, a PHS (Personal Handyphone System), a PDA (Personal Digital Assistant), etc. having a two-way open / close type housing.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a mobile phone according to a first embodiment of the present invention, in which (A) is a perspective view, and (B) is a plan view showing an upper closing surface of a lower casing with the upper casing removed. The perspective view which shows a state when the housing | casing of the mobile telephone which concerns on 1st Embodiment is vertically opened. The perspective view which shows a state when the housing | casing of the mobile telephone which concerns on 1st Embodiment is opened sideways. Explanatory drawing which shows the electrical structure when the housing | casing of the mobile telephone which concerns on 1st Embodiment is vertically opened. VV line sectional view of FIG. Explanatory drawing which shows the electrical structure when the housing | casing of the mobile telephone which concerns on 1st Embodiment is opened sideways. The equivalent circuit which shows the principal part of the mobile telephone which concerns on the 2nd Embodiment of this invention (A) is explanatory drawing which shows the structure of the principal part of the mobile telephone based on 2nd Embodiment, (B) is an equivalent circuit of (A) The graph which shows the frequency characteristic of parallel LC of Drawing 8 (B) which is an equivalent circuit (A) is a perspective view which shows the portable radio | wireless apparatus which has the housing | casing of the conventional 2 axis | shaft opening / closing system, (B) is explanatory drawing which shows the principal part. (A) to (C) is a perspective view showing a portable wireless device having a conventional two-way opening and closing type housing.

Explanation of symbols

10, 20 Mobile phone (mobile wireless device)
1 Upper housing (first housing)
1B-1 Hinge housing facing side 13 Upper printed circuit board (first circuit board)
14 First metal part 14A (first metal part) tip part 2 Lower casing (second casing)
23 Lower printed circuit board (second circuit board)
24 Feeder 25 Antenna Element 3 Hinge Case (Third Case)
3B Upper casing facing side 4 Vertical hinge (second hinge)
41 Vertical hinge hinge shaft (second hinge shaft)
5 Lateral hinge (first hinge)
51 Side-opening hinge shaft (first hinge shaft)
52 Lateral hinge ankle (first holding part)
52A Base end portion (of the lateral hinge ankle) 53 Lateral hinge plate (second holding portion)
6A Insulating material (insulating material)
6b Insulating material (insulating material)
7 Reactance element A1 1st axis A2 2nd axis

Claims (3)

A first housing;
A first circuit board and a first metal part provided in the first housing;
A second housing;
A second circuit board provided in the second housing;
An antenna element provided in the second housing;
A power feeding unit for feeding power to the antenna element from the second circuit board;
A third housing provided between the first housing and the second housing;
A first hinge portion that connects the first housing and the third housing so as to be rotatable about a first axis;
A second hinge portion for connecting the second housing and the third housing so as to be rotatable about a second axis perpendicular to the first axis;
A cable for electrically connecting the first circuit board and the second circuit board;
With
The first hinge part is
A first holding unit disposed in the first housing;
A second holding part disposed in the third casing so as to face the antenna element and containing a conductive material;
The first holding portion and the second holding portion are electrically connected, and the substantially central portion in the longitudinal direction of the surface where the first housing and the third housing face each other in the second axial direction Comprising a first hinge shaft including a conductive material disposed between the first and second ends,
A portable radio apparatus comprising an insulating material between the first holding part and the first metal part.   2. The portable radio apparatus according to claim 1, further comprising means for adjusting a high-frequency electrical connection state between the first holding unit and the first metal unit.   The portable wireless device according to claim 2, wherein the means for adjusting the electrical connection state is a reactance element.

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