JPH09321852A - Portable communication equipment - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a mobile phone that can be self-sustaining so that the polarization plane of the antenna is vertical without increasing the size of the housing. SOLUTION: In a portable communication device such as a mobile phone 9 having a built-in antenna 10, a stand foot 16 is provided in a bottom portion 13 of the portable communication device so that the stand foot 16 can be put in and out, and the portable communication device is taken out when the stand foot is taken out. By making it self-supporting, the antenna polarization plane can be placed vertically.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable communication device such as a mobile phone.

[0002]

2. Description of the Related Art An antenna used in a portable communication device such as a mobile phone usually has directivity and has the highest sensitivity when the antenna polarization plane on the receiving side matches the antenna polarization plane on the transmitting side. Good quality communication is possible.

A conventional mobile phone will be described with reference to FIGS. 13 and 14.

In the figure, reference numeral 1 denotes a mobile phone, a wiring board (not shown) is provided inside the mobile phone 1, and the wiring board has electronic circuits such as a receiving circuit and a transmitting circuit, and a liquid crystal display 2. , An electronic component such as a sounding body is mounted, and the antenna 3
Is connected.

A reception section (not shown), a liquid crystal display 2, an operation button 4, a dial button 5, and a transmission section (not shown) are provided on the front surface of the portable telephone 1, and the antenna 3 is arranged from above. It projects through the housing of the mobile phone 1.

In a wireless communication system such as a mobile phone or a simplified mobile phone, the antenna polarization plane on the master unit side is vertical, and the antenna polarization plane on the slave unit, that is, the mobile wireless unit side is also in a normal use state, that is, the mobile wireless unit. An antenna is provided so that it is upright when it is upright. Therefore, when the portable wireless device is placed on the table, it is preferable to make it stand by itself. Therefore,
In the conventional mobile phone 1 described above, the bottom surface is flat and has a large area so as to maintain sufficient stability.

[0007]

However, if the above-mentioned conventional mobile phone 1 has a flat bottom and a large area so that it can stand on its own, the size of the mobile phone 1 becomes large and the portability is impaired. Also, it is not preferable in terms of design.

For this reason, when the current miniaturization and design are emphasized, many mobile phones 1 cannot stand on their own. The mobile phone 1 that cannot stand on its own has to be placed sideways on a desk, but if the mobile phone 1 having an antenna polarization plane vertical is placed sideways, the sensitivity decreases. For example, when a λ / 4 monopole antenna with a frequency of 1.9 GHz is used, it is reduced by about 20 dB compared with the state of the vertical polarization plane of the antenna. Therefore, there is a problem that the characteristics when not carried are poor.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a self-supporting mobile phone in which the antenna polarization plane is vertical even when left unattended without increasing the size of the housing.

[0010]

SUMMARY OF THE INVENTION The present invention is a portable communication device such as a mobile phone having a built-in antenna, in which a stand foot is provided at the bottom of the portable communication device so that the stand foot can be inserted and removed. In regard to a portable communication device that can be self-supporting, a stand foot is provided on the bottom side of the portable communication device, and the stand foot is related to the portable communication device that can rotate in the bottom surface, and the stand foot is the portable communication device. The stand foot is provided on the back side of the portable communication device, and the stand foot is rotatable about an axis perpendicular to the bottom surface. The present invention relates to a portable communication device in which a stand foot is provided on the bottom side of the portable communication device and is slidable along the bottom surface, and relates to a portable communication device in which the stand foot is removable. It is a thing and a stand leg is provided. Area of the apparent bottom surface of the portable communication device is enlarged, the portable communication device becomes self-sustaining by the.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1 to FIG. 3, reference numeral 9 denotes a mobile phone, which is constructed in substantially the same manner as the conventional mobile phone 1 described above, and a necessary electronic circuit is formed inside the mobile phone 9. A wiring board (not shown) is provided, and the antenna 10 is provided on the wiring board together with electronic components such as the liquid crystal display 11.
Is connected. The antenna 10 is the mobile phone 9
Of the mobile phone 9 and protrudes from the upper surface 12 of the mobile phone 9.

A substantially elliptical recess 15 is formed on the long side of the bottom surface 13 of the mobile phone 9 on the rear surface 14 side.
Is provided with a stand leg 16 which is made of an oval plate material and can be fitted into the recess 15. The stand foot 16 is rotatable in the bottom surface 13 toward the rear surface 14 with one end on the center side of the bottom surface 13 as a center.

The stand foot 16 is rotated toward the rear surface 14 side so as to protrude from the rear surface 14. The stand foot 16
In the state in which is projected, the apparent bottom surface is enlarged and it becomes independent. When carrying the mobile phone 9, the stand foot 16 is rotated in the opposite direction and stored in the recess 15.

Since the mobile phone 9 is provided with the stand legs 16, the apparent area of the bottom surface 13 is enlarged and can be made to stand on a table or the like. It is vertical and the antenna sensitivity does not decrease.

4 to 6 show another embodiment of the present invention. A trapezoidal recess 17 is formed at the end of the rear surface 14 of the mobile phone 9 on the bottom surface 13 side, and one of the recesses 17 is formed. The two leg sides 18 are formed vertically. The recess 17 is provided with a stand leg 19 made of a trapezoidal plate member having one leg side vertical and capable of fitting with the recess 17, and the stand leg 19 is rotatable around the leg side 18 side. The stand foot 19 as a whole can be raised and lowered from the back surface 14. In order to facilitate the ups and downs of the stand foot 19, a semicircular relief portion 20 is provided on the leg side of the recess 17 opposite to the leg side 18 so as to form a part of the recess 17. There is.

By rotating the stand leg 19 so as to be perpendicular to the back surface 14 of the mobile phone 9,
The mobile phone 9 can stand on its own and the antenna polarization plane becomes vertical. When carrying the mobile phone 9, the back surface 1 is used.
The stand leg 19 is rotated to the 4 side and is housed in the recess 17.

The relief portion 20 may be provided on the stand leg 19 instead of the recess 17.

FIGS. 7 to 9 show still another embodiment of the present invention, in which a bottom surface 13 of a mobile phone 9 is provided with a stand foot 21 slidably projectable toward the rear surface 14 side. The stand foot 21 is a pair of left and right slide pieces 2.
2 and 23, the lower end surfaces of the slide pieces 22 and 23 are flush with the bottom surface 13 of the mobile phone 9, and the slide pieces 22 and 23 are connected inside the mobile phone 9.

The stand foot 21 further has a slide knob 24 exposed on the bottom surface of the mobile phone 9, and the slide knob 24 has a hole 2 formed at the bottom of the mobile phone 9.
5 is slidably fitted.

The stand foot 21 can be slid through the slide knob 24.
When 1 is projected as shown in FIG. 7 and FIG. 9 (A), the apparent bottom surface area of the mobile phone 9 is expanded and it becomes possible to stably stand on its own, and the antenna polarization plane is vertical even when the mobile phone 9 is left standing. Can be kept at

10 to 12 show still another embodiment of the present invention, in which a band-shaped recess 26 is formed on the bottom surface 13 of the mobile phone 9 along the long side of the bottom surface 13 on the rear surface 14 side. From substantially the center of the recess 26, and is orthogonal to the recess 26,
A band-shaped recess 27 penetrating to the front side of the mobile phone 9 is formed, and the recess 27 and the recess 26 form a T-shaped recess. The recesses 26 and 27 are made of a T-shaped plate material, and stand feet 28 that can be fitted into the recesses 26 and 27 are slidably fitted along the bottom surface 13. A number of slit-shaped grooves 29 (three in the figure) are formed in the vicinity of the tip of the portion of the stand foot 28 that fits into the recess 27.

By sliding the stand foot 28 and projecting it from the rear surface 14 of the mobile phone 9, the apparent bottom surface area is enlarged, and the mobile phone 9 can stand on its own and the antenna polarization plane is vertical. Can be placed.

Incidentally, the above-mentioned stand legs 16, 19, 2
1, 28 may be removable.

[0025]

As described above, according to the present invention, the stand foot is provided, so that the apparent bottom area of the mobile phone can be expanded and the mobile phone can be made to stand on its own. Therefore, the antenna polarization plane is vertical. It becomes possible to mount it so that the receiving sensitivity is improved, especially the frequency 1.9 GHz, λ /
When the 4-monopole antenna is used, the receiving sensitivity is about 20 as compared with the state where the mobile phone is placed sideways.
If the place to place is an electromagnetic shield such as a steel desk, the antenna polarization plane will be moved away from the electromagnetic shield that shields incoming radio waves, and the reception sensitivity will be improved. Exert the effect.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a rear view showing the embodiment.

FIG. 3 (A) is a bottom view when the stand foot is shown, showing the operation of the same embodiment, and (B) shows the operation of the same embodiment, when the stand foot is stored. FIG.

FIG. 4 is a side view showing another embodiment of the above.

FIG. 5 is a rear view showing another embodiment of the above.

FIG. 6 (A) is a bottom view showing the action of the other embodiment of the same as above, showing the action of the stand foot, and FIG. 6 (B) shows the action of the other embodiment of the same as the same. It is a bottom view at the time of storing.

FIG. 7 is a side view showing still another embodiment of the above.

FIG. 8 is a rear view showing still another embodiment of the same.

FIG. 9 (A) is a bottom view when the stand leg is extended, showing the operation of the other embodiment, and FIG. 9 (B) shows the operation of the other embodiment. It is a bottom view at the time of storing a stand foot.

FIG. 10 is a side view showing still another embodiment of the above.

FIG. 11 is a rear view showing still another embodiment of the above.

FIG. 12 (A) is a bottom view showing the action of another embodiment of the above, with the stand leg extended, and FIG.
FIG. 11 is a bottom view of the case where the stand foot is stored, showing the operation of yet another embodiment.

FIG. 13 is a side view showing a conventional example.

FIG. 14 is a front view showing a conventional example.

[Explanation of symbols]

 9 Mobile phone 10 Antenna 11 Liquid crystal display 12 Upper surface 13 Bottom surface 14 Rear surface 15 Recessed portion 16 Stand foot 17 Recessed portion 18 Leg side 19 Stand foot 20 Relief portion 21 Stand foot 22 Slide piece 23 Slide piece 24 Slide knob 25 Hole 26 Recessed portion 27 Recessed portion 28 Stand foot 29 groove

Claims (6)

[Claims] 1. A portable communication device such as a mobile phone having a built-in antenna, wherein stand feet are provided at the bottom of the portable communication device so as to be able to move in and out, and when the stand feet are taken out, it is possible to stand by itself. Portable communication device. 2. The portable communication device according to claim 1, wherein the stand leg is provided on the bottom side of the portable communication device, and the stand leg is rotatable inside the bottom face. 3. The portable communication device according to claim 1, wherein the stand leg is provided on the back side of the portable communication device, and the stand leg is rotatable about an axis perpendicular to the bottom surface. 4. The portable communication device according to claim 1, wherein the stand foot is provided so as to be able to move in and out of the back surface of the portable communication device. 5. The portable communication device according to claim 1, wherein the stand foot is provided on the bottom surface side of the portable communication device and is slidable along the bottom surface. 6. The stand foot is detachable.
The portable communication device according to claim 5.