Aerodynamic control device and helmet including the same

1. An aerodynamic control device on an outer surface of a helmet, the aerodynamic control device comprising:

a rear spoiler located behind a center of a longitudinal width of the helmet, protruding backward from the helmet and extending behind the helmet;

a first thin plate member and a second thin plate member, disposed at a left rear side and a right rear side of the helmet respectively; and

a void opening disposed behind the helmet,

wherein the void opening is formed on the rear spoiler, the first and second thin plate members, or between the rear spoiler and the first and second thin plate members and adapted to decrease a resistance of turbulence generated by the rear spoiler,

wherein the first and second thin plate members are not integrated with the rear spoiler and each of the first and second thin plate members is an independent part which is attachable to and detachable from the rear spoiler.

2. The aerodynamic control device according to claim 1 ,

wherein the first and second thin plate members are connected to a rear end portion of the rear spoiler.

3. The aerodynamic control device according to claim 1 ,

wherein the void opening is an elongated hole or a narrow lined slit.

4. The aerodynamic control device according to claim 2 ,

wherein the void opening is an elongated hole or a narrow lined slit.

5. The aerodynamic control device according to claim 3 ,

wherein the first and second thin plate members are not integrated with the rear spoiler but each of the first and second thin plate members is an independent part which is attachable to and detachable from the rear spoiler.

6. The aerodynamic control device according to claim 4 ,

wherein the first and second thin plate members are not integrated with the rear spoiler and each of the first and second thin plate members is an independent part which is attachable to and detachable from the rear spoiler.

7. A helmet with an aerodynamic control device comprising:

a rear spoiler which is formed behind a center of a longitudinal width of the helmet so that one end is connected to the helmet and the other end protrudes backward from the helmet and extend behind the helmet, a first thin plate member and a second thin plate member respectively disposed at a left rear side and a right rear side of the helmet, and a void opening formed on the rear spoiler, the first and second thin plate members, or between the rear spoiler and the first and second thin plate members, which decreases a resistance of a turbulence generated by the rear spoiler,

wherein the first and second thin plate members are not integrated with the rear spoiler and each of the first and second thin plate members is an independent part which is attachable to and detachable from the rear spoiler.

8. The helmet according to claim 7 ,

wherein the aerodynamic control device is formed so that the first and second thin plate members are connected to a rear end portion of the rear spoiler.

9. The helmet according to claim 7 ,

wherein the void opening is an elongated hole or a narrow lined slit.

10. The helmet according to claim 8 ,

wherein the void opening is an elongated hole or a narrow lined slit.

11. The helmet according to claim 7 ,

wherein a flow passage is formed on the backside of the helmet in order to release a wind flowing through the void opening of the helmet backward.

12. The helmet according to claim 8 ,

wherein a flow passage is formed on the backside of the helmet order to release a wind flowing through the void opening of the helmet backward.

13. The helmet according to claim 9 ,

wherein a flow passage is formed on the backside of the helmet in order to release a wind flowing through the void opening of the helmet backward.

14. The helmet according to claim 10 ,

wherein a flow passage is formed on the backside of the helmet in order to release a wind flowing through the void opening of the helmet backward.