Vehicle lamp optical element, vehicle lamp module, vehicle headlamp and vehicle

1. A vehicle lamp optical element, comprising a light incoming part, a transmission part and a light exiting part which are sequentially arranged, wherein: the light incoming part is provided with multiple light incoming structures, the light incoming structures are sequentially connected in a left-right direction, the ends facing away from the transmission part, of the light incoming structures form light incoming surfaces, and the light incoming surfaces are curved surfaces protruding backwards; a rear end and a front end, in a light exiting direction, of the transmission part are respectively a light incoming end and a light exiting end of the transmission part; one end, facing away from the light exiting end of the transmission part, of the light exiting part forms a light exiting face, and the light exiting face is a curved face protruding forwards;

wherein the distance between at least one set of opposite side faces of the transmission part gradually increases from the end approaching the light incoming end of the transmission part to the end approaching the light exiting end of the transmission part, a left side surface and a right side surface of the transmission part extend forwards from the end approaching the light incoming end of the transmission part, and then gradually draw close to a direction approaching a central axis of the transmission part; the light incoming part, the transmission part and the light exiting part are integrally formed, the light incoming part further comprises a lens lightening structure located on one side of the light incoming part, and the lens lightening structure is capable of transmitting light rays entering the lens lightening structure to the transmission part by at least one-time reflection and then the light rays transmit to the light exiting part through the transmission part.

2. The vehicle lamp optical element according to claim 1 , wherein the lens lightening structure comprises a first reflecting surface and a second reflecting surface, the first reflecting surface is capable of reflecting light rays entering the first reflecting surface to the second reflecting surface, and the second reflecting surface is capable of reflecting emergent light rays of the first reflecting surface to the transmission part.

3. The vehicle lamp optical element according to claim 2 , wherein the lens lightening structure further comprises a lens lightening light incoming surface, a first light channel and a second light channel, the lens lightening light incoming surface corresponds to the first reflecting surface, the first reflecting surface reflects incident light rays of the lens lightening light incoming surface and then the reflected incident light rays transmit to the second reflecting surface through the first light channel, and emergent light rays of the second reflecting surface are transmitted to the transmission part through the second light channel.

4. The vehicle lamp optical element according to claim 3 , wherein one end of the first light channel is connected to the first reflecting surface while the other end of the first light channel is connected to the second reflecting surface, and a cross sectional area of the first light channel gradually increases from the end approaching the first reflecting surface to the end approaching the second reflecting surface.

5. The vehicle lamp optical element according to claim 4 , wherein the first reflecting surface is located above the second reflecting surface, and the distance between the left side surface and the right side surface of the first light channel gradually increases from the end approaching the first reflecting surface to the end approaching the second reflecting surface.

6. The vehicle lamp optical element according to claim 3 , wherein (1) the first reflecting surface is a cambered surface protruding towards the lens lengthening light incoming surface; or (2) the second reflecting surface is a cambered surface protruding towards a direction away from the first reflecting surface; or (3) the first reflecting surface is a cambered surface protruding towards the lens lengthening light incoming surface and the second reflecting surface is a cambered surface protruding towards a direction away from the first reflecting surface.

7. The vehicle lamp optical element according to claim 3 , wherein the lens lightening light incoming surface is a plane or a convex curved surface, or the lens lightening light incoming surface is provided with a light condensing structure.

8. The vehicle lamp optical element according to claim 2 , wherein one of a reflection increasing layer, skin textures and extinction teeth is arranged on the first reflecting surface.

9. The vehicle lamp optical element according to claim 1 , wherein the cross sectional area of the transmission part gradually increases from a position approaching the light incoming end of the transmission part to a position approaching the light exiting end of the transmission part.

10. The vehicle lamp optical element according to claim 9 , wherein the distance between an upper side surface and a lower side surface of the transmission part gradually increases from the end approaching the light incoming end of the transmission part to the end approaching the light exiting end of the transmission part.

11. The vehicle lamp optical element according to claim 9 , wherein the light incoming structures are arranged in a matrix manner, and the light incoming structures are arranged in at least one row; or

the light incoming structures are configured to condense light rays.

12. The vehicle lamp optical element according to claim 1 , wherein the width of the transmission part is smaller than that of the light exiting part, and the height of the transmission part is smaller than that of the light exiting part.

13. The vehicle lamp optical element according to claim 1 , wherein a cross sectional area of the light exiting part gradually decreases from the end approaching the transmission part to the end away from the transmission part.

14. The vehicle lamp optical element according to claim 1 , wherein (1) at least one side surface of the transmission part is provided with an extinction structure; or (2) the outer surface of the light exiting face is provided with grid patterns or strip-shaped patterns; or (3) at least one side surface of the transmission part is provided with an extinction structure and the outer surface of the light exiting face is provided with grid patterns or strip-shaped patterns.

15. A vehicle lamp module, comprising a circuit board and the vehicle lamp optical element according to claim 1 , wherein the circuit board is arranged behind the light incoming part of the vehicle lamp optical element, and high beam light sources corresponding to the light incoming structures and a lens lightening light source corresponding to the lens lightening structure are arranged on the circuit board, and the high beam light sources and the lens lightening light source can be independently controlled to be turned on or off.

16. The vehicle lamp module according to claim 15 , wherein multiple light incoming structures are arranged, the high beam light sources are in one-to-one correspondence with the light incoming structures, and each high beam light source can be independently controlled to be turned on or off.

17. A vehicle headlamp, comprising the vehicle lamp module according to claim 15 .