Locking of a roof antenna of a vehicle by means of a star wheel
A roof antenna for mounting on a roof of a vehicle comprises a base plate, an antenna cap connected to the base plate, a circuit board disposed under the antenna cap and having a plurality of antenna elements and a plug connection, a central dome connected to the base plate and having a screw thread, a star wheel interacting with the central dome, and a first O-ring secured on the central dome. The first O-ring fixes the central dome movably with respect to the star wheel and/or the base plate.
1. A roof antenna for mounting on a roof of a vehicle, comprising:
a base plate;
an antenna cap connected to the base plate;
a circuit board disposed under the antenna cap and having a plurality of antenna elements and a plug connection;
a central dome connected to the base plate, the central dome is a screw having a screw head, a first circumferential groove disposed in the screw at an end opposite the screw head, and a screw thread between the screw head and the first circumferential groove along the screw;
a star wheel interacting with the central dome; and
a first O-ring secured on the central dome and fixing the central dome movably with respect to the star wheel and/or the base plate, the first O-ring is disposed in the first circumferential groove.
2. The roof antenna of claim 1 , wherein the screw has a second circumferential groove disposed adjacent the screw head.
3. The roof antenna of claim 2 , further comprising a second O-ring disposed in the second circumferential groove.
4. The roof antenna of claim 1 , wherein the base plate has a counterbore receiving the first O-ring in a pre-mounting position of the screw and the star wheel in relation to the base plate.
5. The roof antenna of claim 1 , wherein the star wheel has a plurality of ends guided vertically through a roof opening of the roof in a pre-mounting position.
6. The roof antenna of claim 5 , wherein the ends of the star wheel engage a lower side of the roof in a final mounting position.
7. The roof antenna of claim 1 , wherein the base plate has a stop limiting a rotation angle of the star wheel.
8. The roof antenna of claim 1 , wherein the base plate has a guide rib.
9. The roof antenna of claim 1 , wherein the star wheel covers the plug connection in a pre-mounting position.
10. The roof antenna of claim 9 , wherein the star wheel uncovers the plug connection in a final mounting position.
11. The roof antenna of claim 1 , wherein the star wheel has a rotation angle between a pre-mounting position and a final mounting position.
12. The roof antenna of claim 11 , wherein the rotation angle is a maximum of 45 degrees.
13. The roof antenna of claim 11 , wherein the rotation angle of the star wheel is limited by a counter bearing disposed on the base plate and abutting an upper surface of the roof.
14. The roof antenna of claim 1 , wherein the star wheel has a hexagonal projection capable of being actuated by a tool.
15. The roof antenna of claim 1 , wherein the star wheel has exactly four arms arranged at right angles to each other.