JP2004128971A - Portable communication terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve respective characteristics of a first antenna and a second antenna constituting a diversity antenna and to realize a sufficient diversity effect. <P>SOLUTION: In a portable telephone set 1, wherein a first terminal body 3 having a microphone and a second terminal body 5 having a receiver are made to be relatively freely turnable by a hinge mechanism 6 in the horizontal direction of the first terminal body 3 and the second terminal body 5, and is foldable in the so-called inward direction in which the second terminal body 5 is overlapped on the first terminal body 3 and the first terminal body 3 is opened from the second terminal body 5 at a prescribed angle, the first antenna 8 for transmission and reception is provided on an end part opposite from the hinge mechanism 6 of the first terminal body 3, and the second antenna 9 for reception is provided near the hinge mechanism 6. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a mobile communication terminal in which a first antenna and a second antenna form a diversity antenna.
[0002]
[Prior art]
For example, in a PDC (Personal Digital Cellular system: digital mobile phone) type mobile phone, two antennas are provided in the phone main body, and diversity reception is performed using the two antennas to take measures against fading (for example, Patent Document 1).
[0003]
In order to perform diversity reception efficiently, it is necessary to place two antennas, a transmitting / receiving antenna and a receiving antenna, at appropriate locations on the mobile phone. For example, FIG. 11 illustrates an example in which two antennas for performing diversity reception are arranged at respective positions of a so-called foldable mobile phone that can be folded by folding the mobile phone in two. The foldable mobile phone includes a lower housing 102 having operation buttons 101 and an upper housing 104 having a display unit 103.
[0004]
In the mobile phone shown in FIG. 11A, a first antenna 105 functioning as a transmitting / receiving antenna is provided at an upper end of an upper housing 104, and a second antenna 106 functioning as a receiving antenna is similarly provided in the upper housing. It is built into the upper part of the body 104. In the mobile phone illustrated in FIG. 11B, a first antenna 105 is provided at an upper end of an upper housing 104, and a second antenna 106 is provided at a lower end of a lower housing 102.
[0005]
In the mobile phone illustrated in FIG. 11C, the first antenna 105 is provided at the upper end of the lower housing 102, and the second antenna 106 is similarly provided at the upper end of the lower housing 102. In the mobile phone illustrated in FIG. 11D, a first antenna 105 is provided at an upper end of a lower housing 102, and a second antenna 106 is provided at a lower end of the lower housing 102.
[0006]
[Patent Document 1]
JP-A-10-308618 (page 2, FIG. 1)
[0007]
[Problems to be solved by the invention]
However, it is difficult for any of the mobile phones shown in FIG. 11 to secure sufficient antenna characteristics, and a sufficient diversity effect cannot be obtained. In particular, in a mobile phone in which the first antenna 105 is provided at the upper end portion of the upper housing 104, the first antenna 105 functioning as a transmitting / receiving antenna comes close to the head during a call, so that the call characteristics deteriorate. This is considered to be caused by shielding the radio wave with the head.
[0008]
Therefore, the present invention has been made in view of such a problem, and an object of the present invention is to provide a portable communication terminal that ensures sufficient antenna characteristics and obtains a sufficient diversity effect.
[0009]
[Means for Solving the Problems]
A portable communication terminal according to the present invention includes a first terminal main body having a microphone, a second terminal main body having a receiver, and the first terminal main body and the second terminal main body being relatively moved in the horizontal direction. It has a hinge mechanism that is rotatable and has a second terminal body superimposed on the first terminal body and a hinge mechanism that opens the first terminal body and the second terminal body at a predetermined angle. Then, a first antenna is provided at an end of the first terminal body opposite to the hinge mechanism, a diversity antenna is formed with the first antenna, and a second antenna is provided near the hinge mechanism. Provide.
[0010]
According to the present invention, the first antenna is provided at the end of the first terminal body having the microphone opposite to the hinge mechanism, and the first antenna and the second antenna constituting the diversity antenna are provided. By providing the antenna in the vicinity of the hinge mechanism, these antennas move away from the head, so that sufficient antenna characteristics and a sufficient diversity effect can be obtained.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings. In the present embodiment, the present invention is applied to a mobile phone that can be folded in a so-called in-plane direction, in which two terminal bodies are relatively rotatable in a horizontal direction.
[0012]
[Configuration of mobile phone]
As shown in FIGS. 1 to 4, the mobile phone 1 according to the present embodiment includes a first terminal body 3 having a microphone 2, a second terminal body 5 having a receiver 4, and a first terminal body 5 having a receiver 4. It has a hinge mechanism 6 for rotatably connecting one end sides of the terminal body 3 and the second terminal body 5 to each other. In the mobile phone 1, the first terminal main body 3 and the second terminal main body 5 are relatively rotatable in the horizontal direction (in-plane direction). The two terminal bodies 5 are superimposed (the state shown in FIG. 1) and the first terminal body 3 and the second terminal body 5 are opened at a predetermined angle (the states shown in FIGS. 2 and 4). This is a mobile phone that can be folded in an in-plane direction.
[0013]
[First terminal body]
As shown in FIGS. 1 to 4, the first terminal main body 3 has the microphone 2 and various operation buttons 7 on the surface 3 a on the side overlapping with the second terminal main body 5. Further, the first terminal main body 3 is provided with a first antenna 8 and a second antenna 9 constituting a diversity antenna.
[0014]
The first antenna 8 is a transmission / reception antenna that requires wideband characteristics, and is provided at an end opposite to the hinge mechanism 6. The first antenna 8 includes an antenna main body 10 and an antenna support member 11 for setting the antenna main body 10 in an upright state (the state shown in FIG. 3) and in a closed state (the state shown in FIG. 2).
[0015]
The antenna support member 11 is attached to the end opposite to the side on which the hinge mechanism 6 is provided. The antenna body 10 is movably attached to the antenna support member 11, and is supported in a closed state shown in FIG. 2 and an upright state shown in FIG. The antenna main body 10 maintains a closed state and an upright state by a lock mechanism (not shown).
[0016]
The second antenna 9 is a receiving antenna and is built in the vicinity of the hinge mechanism 6 because it has a narrow band characteristic. Although the second antenna 9 is a receiving antenna in this embodiment, it may be a transmitting / receiving antenna.
[0017]
[Second terminal body]
As shown in FIGS. 1 to 4, the second terminal body 5 has a display unit (for example, a liquid crystal display unit) 12 on a surface 5 a opposite to the surface overlapping the first terminal body 3. Further, the second terminal body 5 has a receiver 4 at an end opposite to the hinge mechanism 6. The display unit 12 is always exposed even when the mobile phone 1 is closed or opened.
[0018]
The second terminal body 5 rotates in the horizontal direction (in-plane direction) with respect to the first terminal body 3 about the hinge mechanism 6. For example, the first terminal body 3 and the second terminal body 5 are overlapped and closed in the same plane as shown in FIG. 1 and opened at an angle of about 180 degrees between these terminal bodies as shown in FIG. State.
[0019]
[Hinge mechanism]
As shown in FIGS. 5 and 6, the hinge mechanism 6 includes a first rotation support member 13 fixed to the first terminal body 3 and a second rotation support member fixed to the second terminal body 5. And a coil spring 15 as an elastic member interposed between the first rotation support member 13 and the second rotation support member 14.
[0020]
The first rotation support member 13 has a cylindrical spring guide portion 16 for guiding the coil spring 15 on the outer peripheral surface thereof, a flange portion 17 integrally formed at a lower end of the spring guide portion 16, and a second rotation member to be described later. And a rotation center hole 19 into which a part of the support member 14 is fitted.
[0021]
A plurality of positioning recesses 20 for fitting positioning projections formed on the second rotation support member 14 are formed at predetermined positions on the upper end surface of the spring guide portion 16. Further, a pair of mounting pieces 21 for fixing the first rotation support member 13 to the first terminal main body 3 are integrated with the flange portion 17. The attachment piece 21 has a screw hole 22 for fixing the first rotation support member 13 to the first terminal main body 3 with a screw.
[0022]
As shown in FIG. 7, a through hole 23 and a hook groove 24 for fixing one end of a coil spring 15 described later are formed in the flange portion 17. The through hole 23 is formed at a position slightly closer to the center from the outer peripheral edge and penetrates in the thickness direction of the flange portion 17. The hook groove 24 is formed on the back surface of the flange portion 17 (the surface opposite to the surface on which the coil spring 15 is mounted) so as to communicate with the through hole 23.
[0023]
As shown in FIGS. 6 and 7, the second rotation support member 14 includes a fitting projection 25 that fits into a rotation center hole 19 formed in the first rotation support member 13, and a fitting projection 25. And a flange portion 26 integrated with the upper end of the portion 25.
[0024]
The fitting projection 25 fits into the rotation center hole 19 and functions as a rotation axis for the first rotation support member 13. The tip of the fitting projection 25 has an R-shaped surface so that it can be easily fitted when fitted into the rotation center hole 19. The center of the fitting projection 25 is used to electrically connect an electronic component provided inside the first terminal main body 3 and an electronic component provided inside the second terminal main body 5. A cable insertion hole 27 through which the cable 18 is inserted is formed.
[0025]
As shown in FIGS. 5 and 6, an arc-shaped groove 28 for facing the other end of the coil spring 15 is formed in the flange portion 26. The arc-shaped groove 28 penetrates in the vertical direction of the flange portion 26 and is formed, for example, over a range of about 220 degrees at a central angle. A guide portion 29 for guiding the other end of the coil spring 15 is formed inside the arc-shaped groove 28. The guide portion 29 is formed as a step surface that is continuous from one end to the other end of the arc-shaped groove 28 and protrudes into the arc-shaped groove 28. The other end of the coil spring 15, which will be described later, faces a space 30 formed by the arc-shaped groove 28 and the guide portion 29.
[0026]
As shown in FIGS. 7 and 8, the first terminal body 3 and the second terminal body 5 are closed and opened (the open state is the first terminal body). A positioning projection 31 is formed for holding (locking) the angle between the third terminal body 5 and the second terminal body 5 at about 180 degrees or at an arbitrary angle. The positioning projections 31 are formed at positions corresponding to the respective positioning recesses 20 formed on the first rotation support member 13. The positional relationship with the second terminal body 5 is held (locked).
[0027]
Further, a pair of mounting pieces 32 for fixing the second rotation support member 14 to the second terminal main body 5 are integrated with the flange portion 26. The attachment piece 32 has a screw hole 33 for fixing the second rotation support member 14 to the second terminal main body 5 with a screw.
[0028]
As shown in FIG. 6, the coil spring 15 has a coil portion 34 wound to a diameter slightly larger than the outer diameter of the spring guide portion 16, and an action portion 35 formed at one end and the other end of the coil portion 34, respectively. , 36. The coil portion 34 is wound, for example, by one turn and a quarter turn, and is mounted around the outer periphery of the spring guide portion 16. As shown in FIGS. 6 and 7, the action portions 35 and 36 are formed by being bent downward or upward with respect to the coil portion 34, and furthermore, by being bent such that their tips are directed outward, they are folded at their tips. It has curved portions 35a and 36a.
[0029]
As shown in FIG. 7, one of the action portions 35 is inserted into the through hole 23 formed in the first rotation support member 13, and the bent portion 35a at the tip thereof is engaged with the above-described hook groove 24. ing. Thereby, one end of the coil spring 15 is fixed to the first rotation support member 13. As shown in FIG. 8, the other action portion 36 is inserted into the arc-shaped groove 28 formed in the second rotation support member 14, and the bent portion 36a at the tip is placed on the guide portion 29 described above. ing. Therefore, a force is applied to the first rotation support member 13 and the second rotation support member 14 by the coil spring 15 in a direction in which the first rotation support member 13 and the second rotation support member 14 are in close contact with each other.
[0030]
According to the hinge mechanism 6 configured as described above, the closed state of FIG. 1 (the angle between the first terminal body 3 and the second terminal body 5 is 0 degree) to the open state of FIG. 2 ( While the angle between the first terminal body 3 and the second terminal body 5 is 180 degrees), the other operating portion 36 moves in the arc-shaped groove 28, so that no load is applied to the coil spring 15. Therefore, the first terminal body 3 and the second terminal body 5 rotate relatively. If the angle formed by the first terminal body 3 and the second terminal body 5 exceeds the central angle 220 degrees of the arc-shaped groove 28, the other action portion 36 comes into contact with the end of the arc-shaped groove 28. A load is applied to the coil spring 15 to prevent the first terminal body 3 and the second terminal body 5 from being further opened.
[0031]
[Usage of mobile phone]
The mobile phone 1 configured as described above can make a call in either the closed state in FIG. 1 or the open state in FIG. For example, as shown in FIG. 9, when a call is made with the mobile phone 1 opened, the second terminal body 5 is arranged near the head, and the first terminal body 3 is separated from the head. Position. At this time, the first antenna 8 functioning as a transmitting / receiving antenna that requires wideband characteristics is located at the lower end of the first terminal body 3 and is provided at a position away from the human head 37. Therefore, antenna characteristics are improved. Further, the second antenna 9 is provided in the vicinity of the hinge mechanism 6 and is located at a position away from the first antenna 8, which is advantageous for the diversity effect.
[0032]
Further, as shown in FIG. 10, when a call is performed with the mobile phone 1 closed, the first antenna 8 is arranged upward, but the first antenna 8 is arranged via the second terminal body 5. Since the terminal body 3 is provided, the first antenna 8 is provided away from the head 37 of the person. Therefore, even if the user talks while the mobile phone 1 is closed, the antenna characteristics do not deteriorate.
[0033]
[Other embodiments]
As described above, the specific embodiments to which the present invention is applied have been described. However, the present invention is not limited to the above-described embodiments, and various changes can be made.
[0034]
For example, in the above embodiment, the first antenna 8 is a movable antenna, and the second antenna 9 is a fixed antenna. However, the first antenna 8 and the second antenna 9 are movable antennas. Or may be fixed.
[0035]
Further, in the above-described embodiment, the description has been given by taking the mobile phone as an example. However, similar effects can be obtained by applying the present invention to a mobile communication terminal such as a PDA (Personal Digital Assistant) having a voice communication function. .
[0036]
【The invention's effect】
According to the present invention, the first antenna is provided at the end of the first terminal body opposite to the hinge mechanism, and the second antenna is provided near the hinge mechanism. And a sufficient diversity effect can be obtained.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a state in which a mobile phone according to the present embodiment is closed.
FIG. 2 is a perspective view showing a state in which the mobile phone according to the present embodiment is opened.
FIG. 3 is a perspective view showing a state in which the mobile phone of the present embodiment is opened and an antenna body of a first antenna is erected.
FIG. 4 is a perspective view showing a state in which the mobile phone of the present embodiment is being opened.
FIG. 5 is a perspective view of a hinge mechanism provided in the mobile phone of the embodiment.
FIG. 6 is an exploded perspective view of a hinge mechanism provided in the mobile phone according to the present embodiment.
FIG. 7 is a cross-sectional view of a hinge mechanism when the mobile phone according to the present embodiment is closed.
FIG. 8 is a cross-sectional view of a hinge mechanism when the mobile phone according to the present embodiment is opened.
FIG. 9 is a diagram illustrating a state in which a mobile phone according to the present embodiment is opened to make a call.
FIG. 10 is a diagram illustrating a state in which a mobile phone according to the present embodiment is closed to make a call.
FIG. 11 is a diagram showing an arrangement relationship between a first antenna and a second antenna arranged in a conventional foldable mobile phone.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Mobile telephone 2 ... Microphone 3 ... 1st terminal main body 4 ... Receiver 5 ... 2nd terminal main body 6 ... Hinge mechanism 7 ... Operation button 8 ... 1st antenna 9 ... 2nd antenna 10 ... Antenna main body 12 ... Display

Claims (5)

A first terminal body having a microphone;
A second terminal body having a receiver,
A state in which the first terminal body and the second terminal body are relatively rotatable in a horizontal direction, and a state in which the second terminal body is overlapped on the first terminal body; A hinge mechanism for opening the terminal body and the second terminal body at a predetermined angle,
A first antenna provided at an end of the first terminal body opposite to the hinge mechanism;
A portable communication terminal, comprising: a diversity antenna configured with the first antenna; and a second antenna provided near the hinge mechanism. The mobile communication terminal according to claim 1,
The mobile communication terminal according to claim 1, wherein the first antenna is a transmitting / receiving antenna. The mobile communication terminal according to claim 1,
The mobile communication terminal according to claim 1, wherein the second antenna is a receiving antenna. The mobile communication terminal according to claim 1,
The mobile communication terminal, wherein the second antenna is a receiving antenna or a transmitting / receiving antenna. The mobile communication terminal according to claim 1,
A voice call can be made both in a state where the second terminal body is overlaid on the first terminal body and in a state where the first terminal body and the second terminal body are opened at a predetermined angle. A mobile communication terminal characterized in that it is possible.

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