JP2007274057A - Mobile wireless terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile wireless terminal with high operability including two cases coupled with a hinge openably/closably so as to be turnable around an openable/closable center and a turning center perpendicular to the openable/closable center that can transmit a signal even if the two cases take any angles. <P>SOLUTION: The mobile wireless terminal includes: the first case 10 including a first circuit board and a first optical communication element 21 connected to the first circuit board; the second case 11 including a second circuit board and a second optical communication element 31 connected to the second circuit board; and the hinge 12 arranged with a mirror 40 therein that hinges the first case 10 and the second case 11 openably/closably so as to be turnable around an openable/closable center and a turning center perpendicular to the openable/closable center, and the mirror 40 reflects emitted light from the first optical communication element 21 in a turning center direction to make the reflected light incident to the second optical communication element 31, and reflects light emitted from the second optical communication element 31 in the turning center direction toward the first optical communication element 21. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a portable wireless terminal and a signal transmission method in the portable wireless terminal, and more particularly includes two casings, which can be opened and closed and rotated about a rotation center perpendicular to the opening and closing center. The present invention relates to a connected portable wireless terminal.

  Recently, portable wireless terminals such as mobile phones are composed of two housings because the display liquid crystal screen can be enlarged, and these two housings can be opened and closed around the connecting portion. Many have a structure. In addition, as in the mobile phone shown in Patent Document 1, for example, the casing on the side having the liquid crystal screen is connected in a biaxial manner so that the liquid crystal screen can be viewed even when the two casings are closed. There are an increasing number of terminals that can be opened and closed by a portion and that can be rotated around a rotation center perpendicular to the opening and closing center. FIG. 6 is a schematic diagram showing an example of an internal configuration when a lower case and an upper case of a mobile phone terminal having a conventional biaxial connecting portion are viewed from the top. In the mobile phone terminal 100 of the prior art, an upper housing 101 and a lower housing 102 are connected to each other by a biaxial connecting portion 103 so as to be able to be opened and closed and to be rotatable around a rotation center perpendicular to the opening and closing center.

  The upper housing 101 is provided with a display unit 110, an imaging unit 111, a receiver 112, a relay board 121, and the like. The lower housing 102 has an operation unit (not shown), a battery unit 113, an antenna (not shown), a microphone (not shown), a speaker (not shown), and a connection connector 120 and is portable. A control unit 114 for controlling each function of the telephone terminal 100 is provided. The signal connection between each component provided in the upper housing 101 and the control unit 114 of the lower housing 102 and the power connection between each component provided in the upper housing 101 and the battery unit 113 are the connections of the control unit 114. The connector 120 and the relay substrate 121 electrically connected to each component of the upper housing 101 are connected by a flexible printed wiring board 119 that passes through the inside of the biaxial coupling portion 103.

  However, when performing signal connection and power supply connection between two housings using the flexible printed wiring board 119 or the multicore cable, there are the following problems.

  The reception sensitivity of the wireless communication of the portable wireless terminal 100 is increased by the radiation of the electric signal passing through the flexible printed wiring board 119 or the multi-core cable disposed inside the biaxial coupling portion 103 which is a connection portion between the two housings. It will decline.

  Further, due to the influence of the impedance of the flexible printed wiring board 119 or the signal line of the multicore cable, high-speed data transfer exceeding a certain limit cannot be performed.

  In addition, the rotation angle of the casing on the side having the liquid crystal display unit is limited to about 180 degrees with respect to the other casing in order to prevent disconnection of the wiring. For example, when the casing on the side having the liquid crystal display unit is forcibly rotated to an angle exceeding the limit, the wiring may be disconnected.

  In order to solve these problems, the technique disclosed in Patent Document 2 uses a hinge portion (connecting portion) to connect a circuit portion provided in the upper housing and a circuit portion provided in the lower housing. ) Through the optical signal line, and the signal line is connected to a photoelectric conversion unit for mutual conversion between light and electricity at both ends. Thus, signal connection and power supply connection are made between the circuit unit provided in the upper housing and the circuit unit provided in the lower housing.

  However, the electronic device of the technique disclosed in Patent Document 2 can rotate the upper housing and the lower housing in the opening / closing direction due to its structure, but the upper housing and the lower housing can be rotated. Does not have a function of rotating around the rotation axis perpendicular to the opening / closing axis. In addition, in the method of performing signal connection and power connection between the circuit unit provided in the upper housing and the circuit unit provided in the lower housing by the optical signal line, the display unit mounted in the recent upper housing In order to perform large-capacity and high-speed data transfer between each of these components and the control unit mounted on the lower housing, with the development of larger screens, higher definition, and higher pixel count of the imaging unit Although it is necessary to increase the number of signal lines, this complicates the configuration of the portable wireless terminal, increases costs, and increases the number of wires passing through the hinge part (connecting part), thereby increasing the possibility of disconnection. Therefore, there is a problem that reliability is lowered.

  In order to solve this problem, the technique disclosed in Patent Document 3 mounts a plurality of optical transceivers in each of the upper and lower casings, and switches to an optical transceiver capable of communication depending on the folding opening / closing angle. Signals are transmitted and received. However, the electronic device of this technology allows the upper casing and the lower casing to be perpendicular to the opening / closing axis even though the upper casing and the lower casing can be rotated in the opening / closing direction due to the structure. The optical transmitter / receiver mounted on each of the upper and lower casings transmits and receives an optical signal by facing each other. There is a problem in that it cannot be applied to a mobile phone terminal in which two casings are openably and closably connected to be rotatable around a rotation axis perpendicular to the open / close axis.

  In the electronic device disclosed in Patent Document 4, as shown in FIG. 7, the main body 211 and the display unit 212 of the notebook computer 201 can freely rotate in the opening / closing direction via a hinge unit (connecting unit) 215. It is connected as follows. As shown in FIG. 8, for example, an angle control mechanism composed of a plurality of gears is provided in the hinge portion 215 and / or its periphery, and this angle control mechanism includes the optical axis of the emitted light LOUT and the reflecting surface of the reflecting mirror M. The angle δ formed by S is ½ of the angle θ formed by the optical axis of the emitted light LOUT and the optical axis of the incident light LIN, and the optical axis of the emitted light LOUT and the optical axis of the incident light LIN. The angle of the reflecting mirror M is controlled according to the change in the angle to be made.

  Thereby, the electrical signal output from the information processing device 213 of the main body 211 is converted into a corresponding optical signal by the light emitting element LD and emitted. The emitted light LOUT from the light emitting element LD is converted into parallel light by the collimator lens LN1, enters the reflecting mirror M, is reflected by the reflecting surface S, is reflected at a reflection angle equal to the incident angle, and this reflected parallel light is reflected. Enters the collimator lens LN2 as incident light LIN and is converged.

  The convergent light enters the light receiving element PD, and the light receiving element PD converts the incident optical signal into an electric signal, and supplies the electric signal to the information processing device 214 of the display unit 212. At this time, even if the angle of the display unit 212 changes with respect to the main body 211, it is always ½ of the angle θ formed by the optical axis of the emitted light LOUT and the optical axis of the incident light LIN. The electric signal output from the information processing device 213 of the main body 211 is supplied to the information processing device 214 of the display unit 212 regardless of the angle between the display unit 212 and the display unit 212.

  However, the electronic device of this technology allows the upper casing and the lower casing to be perpendicular to the opening / closing axis even though the upper casing and the lower casing can be rotated in the opening / closing direction due to the structure. The angle control mechanism is provided in the hinge part (connection part) 215 and / or its periphery to follow the angle formed between the main body 211 and the display part 212. Since it is necessary to control the reflecting surface S of the reflecting mirror M, there is a problem that the connecting portion between the upper housing and the lower housing is large and the structure is complicated.

  Further, in such a structure, since the upper casing and the lower casing are supplied with power by a general cable or a flexible printed wiring board, the electrical connection is gradually changed over time as the usage pattern is repeatedly changed. If this technology is applied to a mobile phone terminal in which two cases can be opened and closed and connected around a rotation axis perpendicular to the opening and closing axis, there is a possibility of deterioration or disconnection. There is a problem that becomes low.

  FIG. 9 shows an optical antenna device of the optical communication system disclosed in Patent Document 5. The optical communication antenna 310 is fixedly disposed on the spacecraft 319 corresponding to the fine tracking system 316 disposed in the spacecraft 319, for example. The optical antenna 310 includes the primary mirror 310a and the secondary mirror. 310b is configured by being combined and arranged by the support member 310c.

  At the tip of the optical antenna 310, a rotating member 312 has an azimuth angle direction around the optical axis (an arrow shown in FIG. 9) via an azimuth angle adjusting mechanism 313 including a drive gear portion 313a, a drive motor 313b, and a drive gear 313c. (In the directions of A and B). The rotating member 312 is provided with a pair of support members 314 each having a shaft 314a. The support members 314 pass an intermediate portion of the guide optical system 11 via the shaft 314a and an elevation angle direction about an axis substantially orthogonal to the optical axis. It is narrowly mounted so that the angle can be freely adjusted (in the directions of arrows C and D shown in FIG. 9).

  An elevation angle adjustment mechanism 315 including a yoke 315a, a permanent magnet 315b, and an electromagnetic drive coil 315d is attached to the base end portion of the guide optical system 11, and the guide optical system 11 is attached to the optical antenna 310 by the elevation angle adjustment mechanism 315. The angle can be adjusted in the elevation direction (directions of arrows C and D shown in FIG. 9).

  Communication light transmitted from the communication partner station is received by the guide optical system 311, guided to the optical antenna 310, reflected by the primary mirror 310 a and the secondary mirror 310 b of the optical antenna 310, and then to the beam splitter 316 a of the fine tracking system 316. Incident.

  The communication light guided to the beam splitter 316a enters the optical axis detection sensor 18 through the transmission optical path, the optical axis is detected by the optical axis detection sensor 18, and this detection signal is output to the tracking control unit 319. . The tracking control unit 319 outputs a signal for controlling the azimuth angle drive adjustment mechanism 313 and the elevation angle adjustment mechanism 315 based on this detection signal, and adjusts the elevation angle and azimuth angle of the guide optical system 11.

  The guide optical system 11 is angle-adjusted around the two axes corresponding to the communication light by the azimuth angle drive adjustment mechanism 313 and the elevation angle adjustment mechanism 315, is roughly tracked with respect to the communication partner station, and the communication light from the communication partner station is transmitted. When the light is received, the communication light is guided to the optical antenna 310.

  The antenna 310 captures communication light by the primary mirror 310a and the secondary mirror 310b, and the communication light is guided from the reflected light path of the beam splitter 316a to the fine tracking system 316 and optically precisely tracked, and is guided to the optical signal processing system 317. In addition, the optical signal processing system 317 acquires information to perform a reception operation.

  In addition, when the communication light from the optical signal processing system 317 is supplied to the light antenna 310 via the fine tracking system 316, the guide optical system 311 performs a transmission operation by transmitting the communication light toward the communication partner station. Is to do.

Japanese Patent Laid-Open No. 2005-217549 FIG. Japanese Patent Laid-Open No. 2005-065076 FIG. Japanese Patent Laid-Open No. 2004-282353 FIG. Japanese Patent Laid-Open No. 2000-194459 FIGS. 1 and 2 Japanese Patent Laid-Open No. 2001-313612 FIG.

  However, the optical antenna device of the optical communication system disclosed in Patent Document 5 guides communication light to the optical antenna 310 by the azimuth angle drive adjustment mechanism 313 and the elevation angle adjustment mechanism 315, and includes an upper housing and a lower housing. When this technology is applied to optical communication with the above, there is a problem that the connecting portion between the upper casing and the lower casing becomes large and the structure becomes complicated. Further, even in such a structure, power is supplied to the upper casing and the lower casing by a general cable or a flexible printed wiring board. If this technology is applied to a mobile phone terminal in which two cases can be opened and closed and connected around a rotation center perpendicular to the opening and closing center, the technology may be deteriorated or disconnected. There is a problem that the property becomes low.

  The present invention has been made in view of such a problem, and includes a first casing and a second casing which are connected to each other so as to be opened and closed by a connecting portion and to be rotatable around a rotation center perpendicular to the opening and closing center. In a portable wireless terminal having a body, the first casing and the second casing are always provided without providing an angle adjustment mechanism in the connecting portion, regardless of the angle between the first casing and the second casing. An object of the present invention is to provide a portable radio terminal with high operability that can transmit signals to and from the housing.

  A portable wireless terminal according to the present invention includes a first housing having a first circuit board and a first optical communication element connected to the first circuit board, a second circuit board, and the second circuit board. A second housing having a second optical communication element connected to the circuit board, and a mirror disposed therein so that the first housing and the second housing can be opened and closed. A connecting portion that is rotatably connected to a center and a rotation center perpendicular to the center, and the mirror reflects light emitted from the first optical communication element in the direction of the rotation center to thereby generate the second light. The light incident on the communication element and reflected from the second optical communication element toward the center of rotation is reflected toward the first optical communication element.

  As a result, the light from the first circuit board and the second circuit board can be obtained regardless of the angle between the first casing and the second casing in the opening / closing direction and the rotation direction orthogonal thereto. Communication is possible.

  The connecting portion includes an opening / closing shaft that connects the first housing and the second housing so as to be openable / closable around the opening / closing center, and the first housing and the second housing. A rotation shaft coupled rotatably around the rotation center; and a power supply shaft provided coaxially with the rotation shaft, the power supply of the first housing and the second housing being provided by the power supply shaft. It is preferable that the power supply of the body is electrically connected.

  As a result, the first circuit board and the second circuit board are electrically connected to each other regardless of the angle between the first casing and the second casing in the opening / closing direction and the rotation direction orthogonal thereto. Connected.

  The second casing can be rotated with respect to the first casing without an upper limit of the rotation angle.

  It is preferable that the opening / closing shaft and the rotation shaft are orthogonal to each other and have a T-shaped hollow portion therein, and the mirror is disposed in the hollow portion.

  The first optical communication element is disposed close to one end of the opening / closing axis so that a central optical axis thereof coincides with an opening / closing center of the opening / closing axis and a transmission / reception surface faces the reflecting surface of the mirror, The second optical communication element may be disposed close to one end of the rotating shaft so that the center optical axis thereof coincides with the rotation center of the rotating shaft and the transmitting / receiving surface faces the reflecting surface of the mirror. Good.

  The first circuit board and the connecting part are connected by a ground line, the second circuit board and the second casing are connected by a ground line, and the connecting part and the second casing are connected to each other. The first circuit board and the second circuit board can be grounded by being formed of a conductive material.

  According to the present invention, the first casing and the second casing that are connected to each other so as to be opened and closed by the connecting portion and rotatable about the rotation center perpendicular to the opening and closing center, Since the central optical axes of the first optical communication element and the second optical communication element always coincide with each other regardless of the angle with respect to the second casing in the opening / closing direction and the rotation direction perpendicular thereto, the first optical communication element and the second optical communication element coincide with each other. Optical communication between the circuit board and the second circuit board is possible. Thereby, it is possible to provide a portable wireless terminal with high operability and high reliability.

  Next, embodiments of the present invention will be specifically described with reference to the accompanying drawings. FIG. 1 is a schematic top view showing an internal configuration of the mobile radio terminal according to the first embodiment of the present invention. In the present embodiment, the portable wireless terminal according to the present invention has a lower casing as a first casing and an upper casing as a second casing, and the lower casing and the upper casing As an example, a foldable mobile phone terminal that is openably and closably connected to a rotation center perpendicular to the open / close center is shown. FIG. 1 shows an internal configuration when a lower case and an upper case of a mobile phone terminal as a mobile radio terminal according to the present embodiment are viewed from the top. 2 is a schematic perspective view showing a state in which the lower casing and the upper casing of the folding mobile phone terminal of FIG. 1 are opened, and FIG. 3 is a state in which the lower casing and the upper casing are also opened. 4 is a schematic perspective view showing a state in which the upper housing is rotated 90 degrees, FIG. 4 is a schematic perspective view showing a state in which the lower housing and the upper housing are closed, and FIG. It is a typical perspective view which shows the state which rotated the degree and closed the lower housing | casing and the upper housing | casing.

  First, the internal configuration of the portable wireless terminal according to the present embodiment will be described. As shown in FIG. 1, the mobile wireless terminal (mobile phone terminal) 1 according to the present embodiment includes one end in the short direction of the lower housing 10 and one end in the short direction of the upper housing 11. Are connected by a biaxial connecting part 12 as a connecting part.

  In the lower housing 10, components (not shown), a control unit 20, and a battery 22 arranged in the lower housing 10 as a first circuit board are arranged. The control unit 20 includes each component (not shown) disposed in the lower housing 10 and each component (not illustrated) electrically connected to the battery 22 and disposed in the upper housing 11. It controls each function of the mobile phone terminal 1 as a whole. The battery 22 supplies power to the control unit 20 and each component in the mobile phone terminal 1.

  In the upper casing 11, each component (not shown) arranged in the upper casing 11 as a second circuit board, a relay board 30 electrically connected thereto, and a display for displaying various information The unit 35, the imaging unit 36, and the receiver 37 are arranged. The upper housing 11 is made of a conductive material.

  The biaxial connecting portion 12 is formed of a conductive material, and is provided with a hollow cylindrical opening / closing shaft 12a provided on an end portion side in the short direction of the lower housing 10, and an axis (opening / closing center) of the opening / closing shaft 12a. And a hollow cylindrical rotating shaft 12b provided partly on the end side of the upper casing 11, thereby having a T-shaped hollow portion. is doing. The opening / closing shaft 12a is formed such that the diameters of both end portions are smaller than the central portion, and the first sliding member 43 is provided in this portion. Further, the rotating shaft 12b shares one part of the through hole with the opening / closing shaft 12a because one end of the rotating shaft 12b is in contact with the opening / closing shaft 12a. The sliding member 44 is provided. The other end portion of the rotating shaft 12b is provided in the upper housing 11, and this end portion is formed to be thicker than other portions, and the second sliding member 44 is formed in this portion. Is provided.

  An opening / closing shaft 12a is provided at the end of the lower housing 10 in the short direction in a direction parallel to the end of the lower housing 10 in the short direction, and a first sliding member 43 is provided on the opening / closing shaft 12a. By being provided, as shown in FIG. 2, the lower housing 10 and the upper housing 11 are connected so as to be smoothly opened and closed with the axis of the opening and closing shaft 12a as the opening and closing center.

  The rotating shaft 12b is provided at the end of the upper housing 11 in the short direction in a direction perpendicular to the end of the upper housing 11 in the short direction, and the second sliding member 44 is further provided on the rotating shaft 12b. By being provided, as shown in FIG. 3, the lower housing 10 and the upper housing 11 are connected so as to be smoothly rotatable around the axis of the rotating shaft 12b as a rotation center.

  By the biaxial connecting portion 12, the lower housing 10 and the upper housing 11 are connected so that they can be smoothly opened and closed with the axis of the opening and closing shaft 12a as the opening and closing center, and the rotary shaft 12b perpendicular to the opening and closing center is connected. When the lower housing 10 and the upper housing 11 are closed, the shaft can be closed in the state shown in FIG. As shown in FIG. 5, the lower housing 10 and the upper housing 11 can be closed by rotating the upper housing 11 by 180 degrees with respect to the lower housing 10 as shown in FIG.

  A first single-core bidirectional optical communication element 21 as a first optical communication element connected in signal with the control unit 20 disposed in the lower housing 10 in the vicinity of one opening of the opening / closing shaft 12a. However, the center optical axis is aligned with the open / close center (axial center) of the open / close shaft 12a, and the transmission / reception surface is installed in a direction facing the inside of the biaxial connecting portion 12. In addition, a second single-core bidirectional optical communication element 31 as a second optical communication element that is signal-connected to the relay substrate 30 disposed in the upper housing 11 in the vicinity of the opening of the rotating shaft 12b is provided. The center optical axis coincides with the rotation center (axial center) of the rotation shaft 12b, and the transmission / reception surface is disposed in a direction facing the inside of the biaxial coupling portion 12.

  The first single-core bidirectional optical communication element 21 and the second single-core bidirectional optical communication element 31 and the second single-core bidirectional optical communication element 31 are located at positions where the optical axis centers are orthogonal to each other. The mirror 40 is installed so as to have an angle of 45 degrees with respect to the center of the optical axis of the core bidirectional optical communication element 31. The optical signal (emitted light) emitted from the first single-core bidirectional optical communication element 21 is reflected by the mirror 40, its optical axis is changed by 90 degrees, passes through the rotation center of the rotation shaft 12b, and passes through the second first signal. The light enters the core bidirectional optical communication element 31. The optical signal (emitted light) emitted from the second single-core bidirectional optical communication element 31 is reflected by the mirror 40, the optical axis thereof is changed by 90 degrees, passes through the opening / closing center of the opening / closing axis 12a, and passes through the first Is incident on the single-core bidirectional optical communication element 21. Thereby, information transmission between the control unit 20 and the relay substrate 30 is performed by the optical signal.

  An insulating member 41 made of an insulating material and having a hollow cylindrical shape is provided inside the rotating shaft 12b so as to contact the inner wall of the rotating shaft 12b, and the insulating member 41 is formed of a conductive material. A conductive member (power supply shaft) 42 having a hollow cylindrical shape is provided coaxially. The biaxial connecting portion 12 and the conductive member 42 are electrically insulated by the insulating member 41. In addition, an electrical connection portion 33 formed of a conductive material and having a rod shape, a part of which is made of a spring 34, is provided so as to be electrically connected to the relay substrate 30. The electrical connection portion 33 is always in contact with the conductive member 42 by being pressed against the surface of the conductive member 42 facing the relay substrate 30 by the spring 34. The end face of the conductive member 42 in the biaxial connecting portion 12 and the control portion 20 in the lower housing 10 are arranged with the first single-core bidirectional optical communication element 21 in the opening of the opening / closing shaft 12a. The battery 22 and the relay board 30 are connected through the control unit 20 by being electrically connected by the power line 24 through the non-opening portion, whereby the power source of the lower casing 10 and the upper casing are connected. 11 power sources are electrically connected.

  The biaxial connecting portion 12 and the upper housing 11 are made of a conductive material. Thereby, the electrical connection between the biaxial connecting portion 12 and the upper housing 11 is performed at the connecting portion where the biaxial connecting portion 12 and the upper housing 11 are in contact with each other. Further, of the end portions of the opening / closing shaft 12 a of the biaxial connecting portion 12, the end portion where the first single-core bidirectional optical communication element 21 is not disposed and the control portion 20 in the lower housing 10 are provided. They are electrically connected by a ground line 23. Further, the relay substrate 30 in the upper housing 11 and the upper housing 11 are electrically connected by a ground wire 32. As a result, the battery 22 is connected to the ground via the control unit 20, whereby the control unit 20 and the relay board 30 are grounded.

  Next, the appearance of the mobile wireless terminal according to the present embodiment will be described. As shown in FIG. 2, the mobile wireless terminal (mobile phone terminal) 1 according to the present embodiment includes a front operation unit having a plurality of operation switches on the inner surface of the lower housing 10 where the mobile phone terminal 1 is opened. 25a, a microphone 26, an antenna (not shown), and a speaker (not shown) are arranged, and a side operation unit 25b having a plurality of operation switches is arranged on the side surface of the lower housing 10. In addition, a display unit 35, an imaging unit 36, and a receiver 37 are disposed on the inner surface of the upper housing 11 where the cellular phone terminal 1 is opened. Moreover, as shown in FIG. 3, LED38 is arrange | positioned in the outer surface where the mobile telephone terminal 1 of the upper side housing | casing 11 was opened.

  Next, the operation of the mobile wireless terminal (mobile phone terminal) 1 according to this embodiment configured as described above will be described. For example, when a signal is sent from the control unit 20 disposed in the lower housing 10 to the relay board 30 disposed in the upper housing 11, the first single-core bidirectional light that is signal-connected to the control unit 20. The optical signal (emitted light) emitted from the communication element 21 enters from the opening of the opening / closing shaft 12a, and the light of the first single-core bidirectional optical communication element 21 and the second single-core bidirectional optical communication element 31. The mirror 40 is installed at an angle of 45 degrees with respect to the optical axis centers of the first single-core bidirectional optical communication element 21 and the second single-core bidirectional optical communication element 31 at positions where the axis centers are orthogonal. And the optical axis is changed by 90 degrees, passes through the rotation center of the rotating shaft 12 b, exits from the opening of the rotating shaft 12 b, and enters the second single-core bidirectional optical communication element 31. The optical signal incident on the second single-core bidirectional optical communication element 31 transmits a signal to the relay board 30 connected in signal to the second single-core bidirectional optical communication element 31. Each component that is electrically connected to the relay board 30 in the upper housing 11 is operated by the signal.

  Signals sent from the control unit 20 to the relay board 30 include image data to be displayed on the display unit 35, data input by the front operation unit 25a or the side operation unit 25b, control signals for the LED 38, and audio output from the receiver 37 during a call. Data etc. can be considered.

  Further, for example, when a signal is sent from the relay board 30 arranged in the upper casing 11 to the control unit 20 arranged in the lower casing 10, both the second cores connected to the relay board 30 and the signal are connected. The optical signal (emitted light) emitted from the directional communication element 31 enters from the opening of the rotating shaft 12b, and the first single-core bidirectional optical communication element 21 and the second single-core bidirectional optical communication element 31. The optical axis centers of the first single-core bidirectional optical communication element 21 and the second single-core bidirectional optical communication element 31 are installed so as to have an angle of 45 degrees, respectively. Reflected by the mirror 40, the optical axis is changed by 90 degrees, passes through the open / close center of the open / close shaft 12a, exits from the opening of the open / close shaft 12a, and enters the first single-core bidirectional optical communication element 21. . The optical signal incident on the first single-core bidirectional optical communication element 21 transmits a signal to the control unit 20 that is signal-connected to the first single-core bidirectional optical communication element 21, and the control unit 20 The functions of the entire mobile phone terminal 1 including the components electrically connected to the control unit 20 in the lower housing 10 and the components in the upper housing 11 are controlled by signals.

  As a signal sent from the relay board 30 to the control unit 20, an image data signal photographed by the imaging unit 36, a signal indicating an operation state of each unit in the upper housing 11, and the like can be considered.

  The lower casing 10 and the upper casing 11 that can be opened and closed by the biaxial connecting portion 12 and that are rotatably connected around the rotation center perpendicular to the opening and closing center are the lower casing 10 and the upper casing 11. The first single-core bidirectional between the control unit 20 in the lower housing 10 and the relay board 30 in the upper housing 11 at any angle in the opening / closing direction and the rotation direction orthogonal thereto. Since the center optical axes of the optical communication element 21 and the second single-core bidirectional optical communication element 31 coincide with each other due to the reflection of the mirror 40, optical communication is possible.

  The power of the battery 22 is supplied to the control unit 20, and the power line 24 connected to the control unit 20 is the opening of the opening of the opening / closing shaft 12a where the first single-core bidirectional optical communication element 21 is not disposed. And is connected to a conductive member (power supply shaft) 42 having a hollow cylindrical shape that is insulated from the rotary shaft 12b by an insulating member 41 inside the rotary shaft 12b. In addition, the relay substrate 30 in the side housing 11 is provided with an electrical connection portion 33 formed of a conductive material and having a rod shape, a part of which is a spring 34. The electrical connection portion 33 is a spring. By being pressed against the surface of the conductive member 42 facing the relay substrate 30 by 34, the conductive member 42 is always in contact with the surface. Thereby, the battery 22 and the relay substrate 30 are connected via the control unit 20, whereby the power supply of the lower housing 10 and the power supply of the upper housing 11 are electrically connected.

  The relay board 30 in the upper housing 11 is electrically connected to the upper housing 11 by a ground wire 32. The upper housing 11 and the biaxial coupling portion 12 are formed of a conductive material, and the upper housing 11 and the biaxial coupling portion 12 are electrically connected by contacting each other at the coupling portion. Of the end portions of the open / close shaft 12a of the biaxial connecting portion 12, the end portion on which the first single-core bidirectional optical communication element 21 is not disposed is connected to the control unit 20 in the lower housing 10 by the ground wire 23. Electrically connected. Further, the control unit 20 and the battery 22 are electrically connected. As a result, the battery 22 is connected to the ground via the control unit 20, whereby the control unit 20 and the relay board 30 are grounded.

  The mobile wireless terminal (mobile phone terminal) 1 according to the present embodiment uses optical communication to perform signal connection between the control unit 20 disposed in the lower housing 10 and the relay board 30 disposed in the upper housing 11. The electrical signal passing between the lower housing 10 and the upper housing 11 is only the power supplied from the battery 22 arranged in the lower housing 10 to each part of the upper housing 11. Therefore, there is no reduction in communication reception sensitivity due to radiation of an electric signal passing between the lower housing 10 and the upper housing 11.

  Further, the signal connection between the control unit 20 arranged in the lower housing 10 and the relay board 30 arranged in the upper housing 11 is configured by optical communication, so that an electric signal is transmitted by the flexible printed wiring board. Compared to the conventional case, it is possible to exchange data of a large volume at a much higher speed, and the possibility of disconnection is reduced. As a result, it is possible to increase the functionality of the portable wireless terminal 1 and improve the reliability.

  Furthermore, a means for configuring the signal connection between the control unit 20 disposed in the lower housing 10 and the relay board 30 disposed in the upper housing 11 by optical communication and supplying power to the upper housing 11 is provided. The battery 22 is connected to the conductive member (power supply shaft) 42 provided in the two-axis connecting portion 12 through the power supply line 24 via the control unit 20, and is electrically connected to the conductive member 42 and the relay substrate 30. In this case, the upper limit of the rotation angle of the upper casing 11 with respect to the lower casing 10 is not limited to 180 degrees and can be rotated infinitely. It is possible to reliably transmit various control signals and connect the power supply between the relay board 30 and the control unit 20 at any angle in the opening / closing direction and the rotation direction perpendicular to the opening / closing direction. Provides mobile phone terminal 1 Rukoto can.

  As shown in FIG. 2, when the lower casing 10 and the upper casing 11 of the cellular phone terminal 1 are opened and the display unit 35 and the front operation unit 25a are directed to the same side, the front operation unit 25a and the side surface By operating the operation unit 25b, creation of an e-mail, confirmation of incoming mail, voice call, videophone using the imaging unit 36, Internet connection, and the like can be performed.

  As shown in FIG. 4, when the lower housing 10 and the upper housing 11 are closed from the state of FIG. 2, the display unit 35 can be protected when stored in a bag, etc. Can be confirmed by a ringing tone from a speaker (not shown) and lighting or blinking of the LED 38.

  Further, as shown in FIG. 3, the upper housing 11 can be rotated with respect to the lower housing 10 from the state of FIG. As shown in FIG. 4, the upper casing 11 can be rotated 180 degrees with respect to the lower casing 10, and the lower casing 10 and the upper casing 11 can be closed with the display unit 35 facing outward. In this state, even when the lower housing 10 and the upper housing 11 are closed, the side operation unit 25b can be operated to display an incoming mail and various information.

In the present embodiment, light emitted from the first single-core bidirectional optical communication element 21 is incident on the mirror 40 at an angle of 45 degrees, and the first single-core bidirectional optical communication element 21 is incident on the mirror 40. Is reflected so that the optical axis of the emitted light is changed by 90 degrees, and this emitted light is made to coincide with the rotation center of the rotating shaft 12b and is incident on the second single-core bidirectional optical communication element 31, The optical axis direction of the light incident on the mirror 40 from the first single-core bidirectional optical communication element 21 is not limited to 45 degrees with respect to the mirror 40 and is arbitrary. The arrangement of the mirror 40 may be set so that the reflected light from the mirror 40 matches the rotation center of the rotation shaft 12b.

  In the present embodiment, a mobile phone terminal has been described as an example of the mobile radio terminal according to the present invention. However, the mobile radio terminal according to the present invention is not limited to a mobile phone, for example, PHS (Personal Handy-phone System). Applicable to portable wireless terminals such as satellite phones, PDAs (Personal Digital Assistants) with wireless functions, and notebook PCs, which can be opened and closed and connected around a rotation center perpendicular to the opening and closing center. can do. In the present embodiment, an example in which the first casing is the lower casing 10 and the second casing is the upper casing 11 is shown, but the present invention is not limited to this. Although the embodiment of the present invention has been described with reference to FIGS. 1 to 5, the specific configuration is not limited to this embodiment, and includes design changes and the like that do not depart from the gist of the present invention. It is.

FIG. 2 is a schematic top view illustrating an internal configuration in a state where a lower housing and an upper housing of the portable wireless terminal according to the first embodiment of the present invention are opened. It is a typical perspective view which shows the state which opened the lower housing | casing and upper housing | casing of the portable radio | wireless terminal which concerns on 1st Embodiment of this invention. It is a typical perspective view which shows the state which rotated the upper housing | casing 90 degree | times in the state which opened the lower housing | casing and upper housing | casing of the portable radio | wireless terminal which concerns on 1st Embodiment of this invention. It is a typical perspective view which shows the state which closed the lower housing | casing and upper housing | casing of the portable radio | wireless terminal which concerns on 1st Embodiment of this invention. It is a typical perspective view which shows the state which rotated the upper housing | casing of the portable radio | wireless terminal which concerns on 1st Embodiment of this invention 180 degree | times, and closed the lower housing | casing and the upper housing | casing. It is a typical top view which shows the internal structure of the state which opened the lower housing | casing and upper housing | casing of the mobile telephone terminal of a prior art. FIG. 10 is a schematic side view showing an internal configuration of a state in which a display unit of an electronic device disclosed in Patent Document 4 is opened. It is a schematic diagram which shows the angle control mechanism of the electronic device disclosed by patent document 4. FIG. FIG. 10 is a schematic side view showing a configuration of an optical antenna device of an optical communication system disclosed in Patent Document 5.

Explanation of symbols

1; Mobile wireless terminal (mobile phone terminal)
10; lower housing 11; upper housing 12; biaxial coupling portion 12a; opening and closing shaft 12b; rotating shaft 20; control portion 21; first single-core bidirectional optical communication element 22; battery 23; ground wire 24; Front operation part 25b; Side operation part 26; Microphone 30; Relay board 31; Second single-core bidirectional optical communication element 32; Ground line 33; Electrical connection part 34; Spring 35; Display part 36; Part 37; receiver 38; LED
40; Mirror 41; Insulating member 42; Conductive member (power supply shaft)
43; first sliding member 44; second sliding member 100; mobile phone terminal 101; upper housing 102; lower housing 103; biaxial coupling portion 110; display portion 111; imaging portion 112; Battery unit 114; Control unit 119; Flexible printed wiring board 120; Connection connector 121; Relay board 201; Notebook computer 211; Main body 212; Display unit 213; Information processing device 214; Information processing device 215; 218; Gear LD; Light emitting element LN1; Collimator lens M; Reflector S; Reflecting surface LN2; Condensing lens PD; Light receiving element LOUT; Emitted light LIN; 310b; secondary mirror 310c; Holding member 311; guide optical system 312; rotating member 313; azimuth angle adjustment mechanism 314; support member 314a; shaft 315; elevation angle adjustment mechanism 315a; yoke 315b; 316a; beam splitter 317; optical signal processing system 318; optical axis detection sensor 319; tracking control unit

Claims (6)

A first housing having a first circuit board and a first optical communication element connected to the first circuit board; a second circuit board; and a second circuit board connected to the second circuit board. A second housing having a plurality of optical communication elements, and a mirror disposed therein so that the first housing and the second housing can be opened and closed and around a rotation center perpendicular to the opening and closing center. A connecting portion that is rotatably connected, and the mirror reflects the emitted light from the first optical communication element in the direction of the center of rotation to enter the second optical communication element, and the second optical communication element A portable wireless terminal that reflects light emitted from the optical communication element toward the rotation center toward the first optical communication element. The connecting portion includes an opening / closing shaft that connects the first housing and the second housing so as to be openable / closable around the opening / closing center, and the first housing and the second housing. A rotation shaft coupled rotatably around the rotation center; and a power supply shaft provided coaxially with the rotation shaft, the power supply of the first housing and the second housing being provided by the power supply shaft. The portable wireless terminal according to claim 1, wherein the portable wireless terminal is electrically connected to a body power supply. The portable wireless terminal according to claim 1, wherein there is no upper limit to the rotation angle of the second casing with respect to the first casing. The portable radio according to claim 2 or 3, wherein the opening and closing shaft and the rotation shaft are orthogonal to each other and have a T-shaped hollow portion therein, and the mirror is disposed in the hollow portion. Terminal. The first optical communication element is disposed close to one end of the opening / closing axis so that a central optical axis thereof coincides with an opening / closing center of the opening / closing axis and a transmission / reception surface faces the reflecting surface of the mirror, The second optical communication element is disposed close to one end of the rotation shaft so that the center optical axis thereof coincides with the rotation center of the rotation shaft and the transmission / reception surface faces the reflection surface of the mirror. The portable wireless terminal according to any one of claims 2 to 4, wherein: The first circuit board and the connecting part are connected by a ground line, the second circuit board and the second casing are connected by a ground line, and the connecting part and the second casing are 6. The portable wireless terminal according to claim 1, wherein the first circuit board and the second circuit board are grounded by being formed of a conductive material. .

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