Accessory for a self-balancing board

1. An accessory for a self-balancing board, the self-balancing board comprising a foot-deck having two lateral foot-deck ends, each lateral foot-deck end being coupled to a motor that drives a wheel in response to an orientation of the lateral foot-deck end relative to a horizontal plane, the foot-deck having at least one sensor that is triggered when a rider is in a riding position thereon, the accessory comprising:

a chassis;

at least one travel surface-contacting element coupled proximal to a first longitudinal end of the chassis to facilitate travel of the chassis over a travel surface;

a seat coupled to the chassis and configured to support a rider;

an engagement structure that releasably engages the self-balancing board and fails to trigger the at least one sensor;

at least one sensor-triggering element that is actuatable relative to the engagement structure between a first position, wherein the at least one sensor-triggering element fails to trigger the at least one sensor, and a second position, wherein the at least one sensor-triggering element triggers the at least one sensor; and

at least one control member coupled to and actuating at least one of the engagement structure and the at least one sensor-triggering element to control the orientation of the lateral foot-deck ends relative to a horizontal plane.

2. An accessory according to claim 1 , wherein the at least one sensor-triggering element is actuatable from the first position to the second position via the weight of the rider sitting atop of the seat.

3. An accessory according to claim 2 , further comprising a seat suspension structure suspending the seat from the engagement structure.

4. An accessory according to claim 3 , wherein the seat suspension structure comprises at least one helical coil spring.

5. An accessory according to claim 2 , wherein the seat is pivotally coupled to the chassis via a hinge.

6. An accessory according to claim 3 , wherein the at least one sensor-triggering element is coupled to the engagement structure and suspended above the foot-deck when the accessory is coupled to a board and the seat is unoccupied by the rider.

7. An accessory according to claim 3 , wherein the at least one sensor-triggering element is fixed in position relative to the seat.

8. An accessory according to claim 7 , wherein the at least one sensor-triggering element comprises a compressible member.

9. An accessory according to claim 8 , wherein the compressible member comprises a flexible arc of material.

10. An accessory according to claim 9 , wherein the flexible arc of material comprises a rubber band.

11. An accessory according to claim 1 , wherein the engagement structure engages the foot-deck when the accessory is coupled to the self-balancing board.

12. An accessory according to claim 11 , wherein the at least one control member is fixed in position relative to the engagement structure.

13. An accessory according to claim 1 , wherein the control member is fixed relative to the at least one sensor-triggering element.

14. An accessory according to claim 1 , wherein the engagement structure is releasably securable to the self-balancing board.

15. An accessory according to claim 1 , wherein the at least one sensor-triggering element is manually actuatable between the first position and the second position.

16. An accessory according to claim 1 , wherein the at least one sensor comprises a pressure sensor.

17. An accessory according to claim 1 , wherein the at least one sensor comprises a light sensor.

18. An accessory according to claim 1 , wherein the travel surface contacting element comprises a wheel.