Rotational antenna apparatus for GPS device

• US 20080030409A1
• Filed: 08/03/2006
• Published: 02/07/2008
• Est. Priority Date: 08/03/2006
• Status: Abandoned Application

• Current Assignee: Dmedia System Co., Ltd.
• Original Assignee: Dmedia System Co., Ltd.
• Inventors: Shih, Yih Lieh
• Application Number:
  US11/498,239
• Publication Number:
  US 20080030409A1
• Time in Patent Office: Days
• US Class Current: 343/702
• CPC Class Codes: H01Q 1/084 Pivotable antennas
• CPC Class Codes: H01Q 1/1257 using the received signal strength
• CPC Class Codes: H01Q 1/242 specially adapted for hand-held use

Abstract

A rotational antenna apparatus for GPS device includes a receiving antenna, a coupling shaft and a rotational stage. The receiving antenna includes a satellite receiving module and a pair of coupling legs on one end thereof. The coupling shaft is of circular cap shape and includes a pair of coupling holes on circumference thereof and corresponding to the coupling legs such that the receiving antenna can be pivotally connected to the coupling shaft and the receiving antenna has 180 degree rotation with the coupling hole as a pivot. The rotational stage is fixed to a casing of the GPS device and includes a pivotal hole through the casing, a tenon pivotally connected to the pivotal hole, wherein the coupling hole is pivotally connected to the coupling leg of the receiving antenna and the receiving antenna has 360 degree rotation with the pivotal hole as a pivot.

Claims

1. A rotational antenna apparatus for GPS device, comprising:

a receiving antenna comprising a satellite receiving module and a pair of coupling legs on one end thereof;

a coupling shaft being of circular cap shape and comprising a pair of coupling holes on circumference thereof and corresponding to the coupling legs such that the receiving antenna can be pivotally connected to the coupling shaft and the receiving antenna has 180 degree rotation with the coupling hole as a pivot;

a rotational stage fixed to a casing of the GPS device and comprising a pivotal hole through the casing, a tenon pivotally connected to the pivotal hole, wherein the coupling hole is pivotally connected to the coupling leg of the receiving antenna and the receiving antenna has 360 degree rotation with the pivotal hole as a pivot.

2. The rotational antenna apparatus for GPS device as in claim 1 wherein the receiving antenna can be of elongated bar shape, elongated panel shape, panel shape, circular panel shape or irregular shape.

3. The rotational antenna apparatus for GPS device as in claim 1, further comprising a signal transmission line electrically connected to the satellite receiving module and passing the coupling hole by the coupling leg, the signal transmission line further passing the pivotal hole for connecting into the casing of the GPS device.

4. The rotational antenna apparatus for GPS device as in claim 1, wherein one coupling leg comprises a hollow cylindrical post and another coupling comprises an axial hole with a threaded post, the tenon comprises two annulus clips on one side thereof and a pin on another side thereof, the pin comprising a threaded hole and the hollow cylindrical post passing into one coupling hole and inserted between the annulus clips, the pin inserted into another coupling hole and inserted into the axial hole, a screw being inserted into the threaded hole of the pin and locked to the threaded post, whereby the receiving antenna can be movably and pivotally arranged.

5. The rotational antenna apparatus for GPS device as in claim 1, wherein the tenon is rotatably arranged in the pivotal hole and locked by a polygon nut, the tenon comprises a spring clamp with one end arranged on inner wall of the coupling shaft and another end being a free end and near outer edge of the polygon nut, when the receiving antenna is rotated, the spring clamp and the outer edge of the polygon nut forms a clamping stair.

6. The rotational antenna apparatus for GPS device as in claim 1, further comprising a plurality of indicating lamps embedded on the receiving antenna and used to indicate navigation direction of the GPS device.

7. The rotational antenna apparatus for GPS device as in claim 6, wherein the indicating lamps are controlled by GPS software in the GPS device and the signal transmission line is connected to the indicating lamps.

8. The rotational antenna apparatus for GPS device as in claim 6, wherein the indicating lamps comprise a left-turn indicating lamp and a right-turn indicating lamp.

9. The rotational antenna apparatus for GPS device as in claim 6, wherein the indicating lamps can be arranged on the GPS device.