Reflection device, reflection element assembly, head-up display and motor vehicle

1 . A reflection device for a head-up display for a windshield head-up display, for reflecting of radiation emitted by an image generation unit, wherein the reflection device comprises:

a reflection element having a reflection side and a back side being arranged on the side remote from the reflection side;

a carrier supporting the reflection element;

a first biasing means for generating at least a biasing force in an axial direction parallel or along the first axis in an assembled state of said reflection device for holding the reflection element in a defined position in axial direction along the first axis after assembling of the reflection device; and

a second biasing means for generating a biasing force in an axial direction perpendicular to the first axis,

wherein the reflection element is movably coupled to the carrier by at least one bearing such that the reflection element is pivotable relatively to the carrier about at least a first axis,

wherein the carrier is couplable to a housing of a head-up display, or directly to a vehicle body, and

wherein the at least one bearing is arranged at the back side of the reflection element such that the first axis is extending completely behind the back side of the reflection element, and

wherein the at least one bearing part and a second bearing part are capable of moving in a direction that is along or parallel to the first axis.

2 . The reflection device according to claim 1 , wherein the reflection element is rotatably coupled to the carrier by at least two bearings comprising a first bearing and a second bearing arranged at the back side of the reflection element with each bearing having a kinematic point and the kinematic points of said bearings defining the first axis about which the reflection element is rotatable relatively to the carrier.

3 . The reflection device according to claim 1 , wherein at least one bearing comprises at least two parts a bearing pivot and a bearing receptacle for receiving said bearing pivot, wherein one of said parts, the bearing pivot or the bearing receptacle, is mounted fixedly to the reflection element and the other one, bearing receptacle or the bearing pivot, respectively, is mounted fixedly to the carrier.

4 . The reflection device according to claim 3 , wherein at least one bearing receptacle is fixedly mounted to the reflection element via a support structure.

5 . The reflection device according to claim 2 , wherein one of said two bearings comprises one degree of freedom with respect to a translation in an axial direction along the first axis and enables relative movement between the bearing parts in a first axial direction along the first axis, wherein an axial movement in a second axial direction opposite to the first axial direction is limited by an end stop.

6 . The reflection device according to claim 2 , wherein one of said two bearings comprises two degrees of freedom with respect to a translation in an axial direction along the first axis and enables relative movement between the bearing parts in a first axial direction along the first axis and in a second axial direction opposite to the first axial direction.

7 . The reflection device according to claim 1 , wherein at least one bearing comprises a bearing receptacle which is designed, configured and aligned such that an assembly direction along which the bearing pivot has at least partly to be inserted into the bearing receptacle is extending at least substantially parallel or parallel to the first axis of the reflection device.

8 . The reflection device according to claim 3 , wherein the reflection device comprises at least one securing element for securing the coupling between the reflection element and the carrier.

9 . A reflection element assembly for a reflection device for a head-up display, comprising:

a reflection element having a reflection side and a back side being arranged on the side remote from the reflection side; and

at least one bearing part of an at least two-part bearing,

wherein the reflection element is pivotably couplable to a carrier by at least one bearing comprising at least two bearing parts such that the reflection element is pivotable relatively to the carrier about at least a first axis, wherein the carrier supports the reflection element and is couplable to a housing of a head-up display, or directly to a vehicle body,

wherein at least one bearing part of said at least one bearing is arranged at the back side of the reflection element and is configured such that in a state of use of the reflection assembly the first axis is extending completely behind the back side of the reflection element,

wherein the at least one bearing part and a second bearing part are capable of moving in a direction that is along or parallel to the first axis,

wherein the reflection element is held in a defined position in axial direction along the first axis after assembling of the reflection device by a biasing means that generates at least a biasing force in an axial direction parallel or along the first axis in an assembled state of said reflection device, and

wherein a second biasing means generates a biasing force in an axial direction perpendicular to the first axis.

10 . A head-up display for a motor vehicle, comprising:

an image generation unit for emitting light beams to produce an image; and

at least one reflection device for reflecting the light beams emitted by the image generation unit,

wherein the reflection device configured according to claim 1 .

11 . A motor vehicle having a head-up display configured according to claim 10 .