Antenna holder

1. An antenna holder to be mounted on a body part of a motor vehicle having an opening, comprising:

an antenna base; and

a preassembled anchoring device projecting beyond the antenna base, the outer cross section of the preassembled anchoring device being smaller than an opening cross section of the opening of the motor vehicle;

wherein the preassembled anchoring device includes:

a socket part which is connected with the antenna base,

an anchoring claw having a plurality of spreadable arms,

a spreading element, and

an actuating member with at least one of an axis of rotation and a central axis,

wherein the spreadable arms of the anchoring claw, in a non-deformed initial state, are arranged running from a center part of the anchoring claw obliquely away from the antenna base and outwards from the axis of the actuating member,

wherein the spreading element is arranged on a side of the anchoring claw lying facing away from the antenna base,

wherein the spreading element has spreading arms that act on the spreadable arms of the anchoring claw so that on actuation of the actuating member, the spreadable arms of the anchoring claw are spread apart as the spreading element approaches the antenna base, the spreading element bending the spreadable arms of the anchoring claw while effecting a deformation and directing the spreadable arms towards the antenna base so that free ends of the spreadable arms in a spread-apart position press onto a surface of the body part facing away from the antenna base, as the spreadable arms are bent upwardly towards the antenna base by the spreading element, and

wherein the spreadable arms of the anchoring claw have embossings extending over part of the length of the arms, with a convexly curved outer side facing the antenna base and with a concavely curved inner side pointing away from the antenna base, and wherein the spreading arms of the spreading element are provided on an upper side of the spreading arms, facing the antenna base, with sliding surfaces which are bent and are convex in cross-section, which are essentially configured to correspond generally in shape to the concave inner sides of the spreadable arms of the anchoring claw.

2. The antenna holder according to claim 1 , wherein the body part is a motor vehicle roof.

3. The antenna holder according to claim 1 , wherein the spreading element bends the arms of the anchoring claw while the spreading element is approaching the antenna base, so that the free ends project beyond the outer cross section of the preassembled anchoring device and become engaged with a surface of the car body part facing away from the antenna base.

4. The antenna holder according to claim 1 , wherein the actuating member is a screw, which holds together components of the anchoring device in a preassembled state.

5. The antenna holder according to claim 4 , wherein the screw penetrates passageways in the spreading element and in the anchoring claw.

6. The antenna holder according to claim 4 , wherein the screw is in threaded engagement with the antenna base, and lies against the spreading element using a widened head part.

7. The antenna holder according to claim 1 , wherein the spreading arms have bent sliding surfaces diverging from the antenna base for acting on the arms of the anchoring claw.

8. The antenna holder according to claim 1 , wherein the free ends of the spreadable arms of the anchoring claw are pointed.

9. The antenna holder according to claim 1 , wherein the arms of the anchoring claw have a cross sectional narrowing at or near their base.

10. The antenna holder according to claim 1 , wherein a fixing aid pre-fixes the antenna holder in the opening.

11. The antenna holder according to claim 1 , wherein the antenna holder is part of a roof antenna for a motor vehicle.

12. The antenna holder according to claim 1 , wherein the actuating member is configured as a screw, constructed separately from the spreading element.

13. The antenna holder according to claim 12 , wherein the actuating member is in the form of a screw and holds together the socket part connected with the antenna base, the anchoring claw and the spreading element of the anchoring device in the preassembled state.

14. The antenna holder according to claim 12 , wherein the screw penetrates passageways in the spreading element and in the anchoring claw.

15. The antenna holder according to claim 12 , wherein the screw is in threaded engagement with the antenna base and lies against the spreading element using a widened head part of the screw.

16. The antenna holder according to claim 1 , wherein the spreadable arms of the anchoring claw in the non-deformed initial state of the spreadable arms are bent slightly in an S-shape.

17. An antenna system, comprising:

a roof antenna for a motor vehicle; and

an antenna holder to be mounted on a body part of a motor vehicle having an opening, including:

an antenna base; and

a preassembled anchoring device projecting beyond the antenna base, an outer cross-section of the antenna base being larger than an opening cross section of the opening of the motor vehicle,

wherein the preassembled anchoring device includes:

a socket part which is connected with the antenna base,

an anchoring claw having a plurality of spreadable arms,

a spreading element, and

an actuating member with at least one of a rotation axis and a central axis,

wherein the spreadable arms of the anchoring claw, in a non-deformed initial state, are arranged running from a center part of the anchoring claw obliquely away from the antenna base and outwards from the axis of the actuating member,

wherein the spreading element is arranged on a side of the anchoring claw lying facing away from the antenna base, and

wherein the spreading element has spreading arms that act on the spreadable arms of the anchoring claw so that on actuation of the actuating member, the spreadable arms of the anchoring claw are spread apart as the spreading element approaches the antenna base, the spreading element bending the spreadable arms of the anchoring claw while effecting a deformation and directing the spreadable arms towards the antenna base so that free ends of the spreadable arms in a spread-apart position press onto a surface of the body part facing away from the antenna base, as the spreadable arms are bent upwardly towards the antenna base by the spreading element, and

wherein as the spreadable arms are bent upwardly towards the antenna base by the spreading element, each of the spreading arms of the spreading element and each of the spreadable arms of the anchoring claw ride within guides.

18. The antenna system according to claim 17 , wherein the guides are formed by slots in the socket part.

19. An antenna holder to be mounted on a body part of a motor vehicle having an opening, comprising:

an antenna base; and

a preassembled anchoring device projecting beyond the antenna base, the outer cross section of the preassembled anchoring device being smaller than an opening cross section of the opening of the motor vehicle;

wherein the preassembled anchoring device includes:

a socket part which is connected with the antenna base,

an anchoring claw having a plurality of spreadable arms,

a spreading element, and

an actuating member with at least one of an axis of rotation and a central axis,

wherein the spreadable arms of the anchoring claw, in a non-deformed initial state, are arranged running from a center part of the anchoring claw obliquely away from the antenna base and outwards from the axis of the actuating member,

wherein the spreading element is arranged on a side of the anchoring claw lying facing away from the base plate,

wherein the spreading element has spreading arms that act on the spreadable arms of the anchoring claw so that on actuation of the actuating member, the spreadable arms of the anchoring claw are spread apart as the spreading element approaches the antenna base, the spreading element bending the spreadable arms of the anchoring claw while effecting a deformation and directing the spreadable arms towards the antenna base so that free ends of the spreadable arms in a spread-apart position press onto a surface of the body part facing away from the antenna base, and

wherein as the spreadable arms are bent upwardly towards the antenna base by the spreading element, each of the spreading arms of the spreading element and each of the spreadable arms of the anchoring claw ride within guides.

20. The antenna holder according to claim 19 , wherein the guides are formed by slots in the socket part.

21. An antenna holder to be mounted on a body part of a motor vehicle having

an opening, comprising:

an antenna base; and

a preassembled anchoring device projecting beyond the antenna base, the outer cross section of the preassembled anchoring device being smaller than an opening cross section of the opening of the motor vehicle;

wherein the preassembled anchoring device includes:

a socket part which is connected with the antenna base,

an anchoring claw having a plurality of spreadable arms,

a spreading element, and

an actuating member with at least one of an axis of rotation and a central axis,

wherein the spreadable arms of the anchoring claw, in a non-deformed initial state, are arranged running from a center part of the anchoring claw obliquely away from the antenna base and outwards from the axis of the actuating member,

wherein the spreading element is arranged on a side of the anchoring claw lying facing away from the base plate,

wherein the spreading element has spreading arms that act on the spreadable arms of the anchoring claw so that on actuation of the actuating member the spreadable arms of the anchoring claw are spread apart as the spreading element approaches the antenna base, the spreading element bending the spreadable arms of the anchoring claw while effecting a deformation and directing the spreadable arms towards the antenna base so that free ends of the spreadable arms in a spread-apart position press onto a surface of the body part facing away from the antenna base, and

wherein as the spreadable arms are bent upwardly towards the antenna base by the spreading element, each of the spreading arms of the spreading element, and each of the spreadable arms of the anchoring claw ride within guides formed by slots in the socket part.

22. An antenna holder according to claim 21 , wherein the spreading arms have bent sliding surfaces diverging from the antenna base for acting on the arms of the anchoring claw.

23. The antenna holder according to claim 21 , wherein the spreadable arms of the anchoring claw have embossings extending over part of the length of the arms, with a convexly curved outer side facing the antenna base and with a concavely curved inner side pointing away from the antenna base, and wherein the spreading arms of the spreading element are provided on an upper side of the spreading arms, facing the antenna base, with sliding surfaces which are bent and are convex in cross-section, which are essentially configured to correspond generally in shape to the concave inner sides of the spreadable arms of the anchoring claw.

24. An antenna system, comprising:

a roof antenna for a motor vehicle; and

an antenna holder to be mounted on a body part of a motor vehicle having an opening, including:

an antenna base; and

a preassembled anchoring device projecting beyond the antenna base, the outer cross section of the preassembled anchoring device being smaller than an opening cross section of the opening of the motor vehicle, wherein the preassembled anchoring device includes:

a socket part which is connected with the antenna base,

an anchoring claw having a plurality of spreadable arms,

a spreading element, and

an actuating member with at least one of an axis of rotation and a central axis;

wherein the spreadable arms of the anchoring claw, in a non-deformed initial state, are arranged running from a center part of the anchoring claw obliquely away from the antenna base and outwards from the axis of the actuating member,

wherein the spreading element is arranged on a side of the anchoring claw lying facing away from the base plate,

wherein the spreading element has spreading arms that act on the spreadable arms of the anchoring claw so that on actuation of the actuating member the spreadable arms of the anchoring claw are spread apart as the spreading element approaches the antenna base, the spreading element bending the spreadable arms of the anchoring claw while effecting a deformation and directing the spreadable arms towards the antenna base so that free ends of the spreadable arms in a spread-apart position press onto a surface of the body part facing away from the antenna base, and

wherein as the spreadable arms are bent upwardly towards the antenna base by the spreading element, each of the spreading arms of the spreading element, and each of the spreadable arms of the anchoring claw ride within guides formed by slots in the socket part.