JP3580245B2 - Mobile terminal - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a mobile terminal, and more particularly to a mobile terminal having a built-in antenna and a receiving circuit for receiving a GPS radio wave transmitted from an artificial satellite.
[0002]
[Prior art]
Conventionally, a portable terminal that has a position detecting function that incorporates or couples a GPS (Global Positioning System) antenna that receives a radio wave transmitted from an artificial satellite and displays detected position information on a display unit has been conventionally used. It is more known (Japanese Patent Laid-Open No. 2000-193734).
[0003]
This conventional portable terminal includes a terminal connecting means formed to be electrically connectable with a terminal device, a rotatable connection to the terminal connecting means, and a GPS transmitted from an artificial satellite. An antenna device for receiving a radio wave for use therein is housed therein, and a radio wave receiving means formed in a lid shape of the portable terminal is provided. According to this conventional portable terminal, the antenna device is housed inside the lid-shaped radio wave receiving means, so that it has a feature that it is convenient to carry.
[0004]
[Problems to be solved by the invention]
However, in the above-described conventional portable terminal, since the antenna device is fixed inside the lid-shaped radio wave receiving means, it is necessary to direct the antenna receiving surface in the vertical direction in order to perform good reception at the time of radio wave reception. . However, the display unit for displaying the detected position information and the like also faces the vertical direction at the same time, so that it is difficult to see it. In addition, if the user brings his / her face to the front of the display unit for viewing, there is a problem that the human body may interfere with radio wave reception.
[0005]
The present invention has been made in view of the above points, and by enabling a cylindrical portion having a built-in receiving antenna to be rotatable, even when the device is tilted at an angle at which the display portion is easy to see, the cylindrical portion is rotated so that a reception state is obtained. It is an object of the present invention to provide a mobile terminal capable of directing an antenna receiving surface in a vertical direction which is best.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention has a display unit and an operation unit, a device body having a built-in receiving circuit, and a rod-shaped antenna for receiving a GPS radio wave transmitted from an artificial satellite are fixed inside. A cylindrical portion rotatably attached to the main body of the device with the axial direction as a rotation axis, and having a cylindrical portion configured to be stationary at an arbitrary rotation angle position, wherein the cylindrical portion identifies the antenna receiving surface direction of the rod-shaped antenna. A mark is formed on the outside, and the mark can be manually turned to an arbitrary angle position regardless of the position of the display unit .
[0007]
Further, in order to achieve the above object, the present invention provides a portable terminal having a structure in which a display unit and an operation unit are connected by a rotating hinge, and the display unit and the operation unit are folded so as to face each other. A rod-shaped antenna for receiving a GPS radio wave is fixed inside, one end or both ends are fitted to a rotating hinge so as to be rotatable about the axial direction as a rotation axis, and at an arbitrary rotation angle position. It has a cylindrical portion that is made to be stationary , and the cylindrical portion is formed with a mark for identifying the antenna receiving surface direction of the rod-shaped antenna on the outside, and is configured to be manually rotatable to an arbitrary angular position. It is characterized by the following.
[0008]
In each of the above inventions, the internal GPS radio wave receiving antenna rotates together with the cylindrical portion, but the rotation angle position is determined based on the antenna receiving surface direction identification mark formed outside the cylindrical portion. The antenna receiving surface can be manually adjusted so as to be oriented in the vertical direction at which the radio wave gain from the satellite is best.
[0009]
Here, by providing a rotation stopper so that the above-mentioned cylindrical portion rotates only within a preset angle range, it is possible to prevent the conductor from the antenna inside the cylindrical portion to the receiving circuit from being twisted more than necessary. Desirable in point.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a front view of a first embodiment of a portable terminal according to the present invention. In the figure, the portable terminal 1 of the first embodiment is provided with a cylindrical portion 3 in which one or both sides in the axial direction are fitted on the upper part of a device main body 2 so as to be rotatable. The cylindrical portion 3 has a built-in rod antenna for receiving GPS radio waves. The antenna receiving surface of the rod-shaped antenna has a mark 4 provided on the outside of the cylindrical portion 3 by printing, engraving or other means so that a user can use the antenna. It can be seen from outside.
[0014]
The cylindrical portion 3 is manually rotatable so as to stop at an arbitrary rotation angle position, but can be rotated only within a predetermined rotation angle range by a stopper (not shown). Thereby, the conducting wire connecting the built-in GPS radio wave receiving rod-shaped antenna of the cylindrical portion 3 and the receiving circuit inside the apparatus main body 2 can be prevented from being twisted more than necessary. Further, the apparatus main body 2 is provided with a display unit 5 for performing various displays and an operation button 6 for performing various inputs.
[0015]
Next, the operation of the mobile terminal 1 will be described. The GPS radio wave received by the built-in GPS radio wave receiving rod antenna of the cylindrical portion 3 is converted into an electric signal and supplied to a receiving circuit inside the apparatus main body 2 via a lead wire provided in the cylindrical portion 3 in the axial direction. Is processed.
[0016]
Here, if the device main body 2 is tilted and the rod-shaped antenna for receiving GPS radio waves is fixed, the antenna receiving surface may not face the GPS satellite direction. In that case, the antenna gain decreases, and the position detection accuracy decreases. Will decrease. On the other hand, in the portable terminal 1 of this embodiment, even if the device main body 2 is tilted, the user manually rotates the cylindrical portion 3 so that the mark 4 is directed to the GPS satellite, thereby displaying the display portion 5. Independently of the direction, the antenna receiving surface of the GPS radio wave receiving rod antenna can be oriented in the vertical direction at which the radio wave gain from the GPS satellite is the best, so that the visibility of the display on the display unit 5 is ensured. Good reception of GPS satellite radio waves can be performed in this state, and position detection accuracy can be improved as compared with the related art.
[0017]
Next, a second embodiment of the present invention will be described. 2A and 2B show a front view and a side view of a second embodiment of the portable terminal according to the present invention. As shown in FIGS. 2A and 2B, a portable terminal 8 according to the second embodiment includes an operation unit 10 provided with operation buttons 9 for performing various input operations, and a liquid crystal display element. Is a mobile terminal having a structure in which a display unit 11 having a display screen according to (1) and (2) is connected by a rotating hinge 12, and the operation unit 10 and the display unit 11 are folded so as to face each other.
[0018]
In this portable terminal 8, a rod-shaped antenna for receiving GPS radio waves is built in the cylindrical portion 13 of the rotating hinge 12, and one or both ends of the cylindrical portion 13 in the axial direction are positioned with respect to the rotating hinge 12. It is attached rotatably about the axial direction as a rotation axis. Further, the antenna receiving surface of the built-in rod antenna for receiving GPS radio waves can be recognized by the user from the outside by a mark 14 provided by printing, engraving or other means outside the cylindrical portion 13.
[0019]
Further, the cylindrical portion 13 is manually rotatable together with the rod-shaped antenna for receiving the GPS radio wave and stopped at an arbitrary rotation angle position. However, the cylinder portion 13 can be rotated only within a predetermined rotation angle range by a stopper (not shown). It is possible to move. Thereby, the conducting wire connecting the built-in GPS radio wave receiving rod-shaped antenna of the cylindrical portion 13 and, for example, the receiving circuit inside the operation portion 10 can be prevented from being twisted more than necessary.
[0020]
Next, the operation of the portable terminal 8 will be described. The GPS radio wave received by the rod-shaped antenna for receiving GPS radio wave in the cylindrical portion 13 is converted into an electric signal and supplied to a receiving circuit inside the operation portion 10 through a conductor provided in the cylindrical portion 13 in the axial direction. Is processed.
[0021]
Here, when the mobile terminal is tilted and the rod-shaped antenna for GPS radio wave reception is fixed, the antenna reception surface may not face the GPS satellite direction, and in that case, the antenna gain decreases and the position detection accuracy decreases. Will drop. On the other hand, in the portable terminal 8 according to the present embodiment, even when the portable terminal 8 is tilted, the user manually rotates the cylindrical portion 13 so that the mark 14 is directed toward the GPS satellite, so that the display unit 11 is rotated. Independently of the direction, only the antenna receiving surface of the rod antenna for receiving GPS radio waves can be oriented in the vertical direction in which the radio wave gain from the GPS satellite is the best, so that the display unit is similar to the first embodiment. Good GPS satellite radio waves can be received in a state where the visibility of the display of No. 11 is ensured, and the position detection accuracy can be improved as compared with the related art.
[0022]
Next, a third embodiment of the present invention will be described. In the above-described first and second embodiments, the cylindrical portion 3 (13) has the GPS radio wave reception therein as shown in the front view of FIG. 3A and the vertical side view of FIG. A rod antenna 16 is provided so that the cylindrical portion 3 (13) can be manually rotated within the set angle range with the axial direction as a rotation axis.
[0023]
On the other hand, in the portable terminal according to the third embodiment, the cylindrical portion used as the cylindrical portion 3 or 13 is shown in the front view of FIG. 4A and the vertical side view of FIG. As shown by 18, a GPS radio wave receiving rod-shaped antenna 19 is fixed inside so as to rotate integrally with the rotation of the cylindrical portion 18, and a cylindrical portion opposite to the antenna surface of the GPS radio wave receiving rod-shaped antenna 19 is provided. A weight (heavy parts) 20 is fixed at a position inside the reference numeral 18.
[0024]
Since the cylindrical portion 18 is freely rotatable around the axial direction as a rotation axis, even when the device main body is tilted, the antenna surface of the rod-shaped antenna 19 for receiving GPS radio waves is automatically moved by the gravity of the weight 20. Rotate to turn vertically. Thereby, independently of the direction of the display unit, only the antenna receiving surface of the GPS radio wave receiving rod-shaped antenna 19 can be directed to the vertical direction in which the radio wave gain from the GPS satellite is the best. As in the embodiment, good GPS satellite radio waves can be received in a state where the visibility of the display on the display unit is ensured, and the position detection accuracy can be improved as compared with the related art.
[0025]
【The invention's effect】
As described above, according to the present invention, the rotation angle position of the GPS radio wave receiving antenna inside the cylindrical portion is determined based on the antenna receiving surface direction identification mark formed outside the cylindrical portion. Since the receiving surface can be manually adjusted so that it points in the vertical direction where the radio wave gain from the satellite is the best, it is possible to receive good satellite radio waves while maintaining the visibility of the display on the display unit. Compared with this, the position detection accuracy can be improved.
[Brief description of the drawings]
FIG. 1 is a front view of a first embodiment of the present invention.
FIG. 2 is a front view and a side view of a second embodiment of the present invention.
FIG. 3 is a front view and a longitudinal side view of the cylindrical portion of FIGS. 1 and 2;
FIG. 4 is a front view and a vertical sectional side view of a cylindrical portion according to a third embodiment of the present invention.
[Explanation of symbols]
1, 8 Mobile terminal 2 Device main body 3, 13, 18 Cylindrical part 4, 14 Mark 5, 11 Display part 6, 9 Operation button 10 Operation part 12 Rotating hinge 16, 19 Rod antenna 20 for GPS radio wave reception 20 Weight (weight part)

Claims (3)

An apparatus main body having a display unit and an operation unit, and having a built-in receiving circuit,
A rod-shaped antenna for receiving a GPS radio wave transmitted from an artificial satellite is fixed inside, is rotatably attached to the apparatus main body around an axial direction as a rotation axis, and stops at an arbitrary rotation angle position. And a mark for identifying the direction of the antenna receiving surface of the rod-shaped antenna is formed on the outside of the cylindrical portion, and manually at an arbitrary angular position regardless of the position of the display unit. A mobile terminal having a rotatable configuration. In a portable terminal having a structure in which a display unit and an operation unit are connected by a rotating hinge and the display unit and the operation unit can be folded so as to face each other,
A rod-shaped antenna for receiving a GPS radio wave transmitted from an artificial satellite is fixed inside, one end or both ends are fitted to the rotating hinge and are rotatably mounted with the axial direction as a rotation axis, and Has a cylindrical portion that is made to be stationary at any rotational angle position,
A portable terminal, wherein a mark for identifying the direction of the antenna receiving surface of the rod-shaped antenna is formed outside the cylindrical portion, and the cylindrical portion is configured to be manually rotatable to an arbitrary angular position. 3. The mobile terminal according to claim 1, wherein a rotation stopper is provided so that the cylindrical portion rotates only within a preset angle range.

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