Foldable fin for watersport equipment

1. A fin assembly for a watersport board, comprising:

a support base having a locking member, the support base being configured to attach the fin assembly to a surface of the watersport board, and

a foldable fin comprising a fin base portion coupled to the support base and a fin portion extending from the fin base portion, wherein:

the fin portion is configured to move between a folded position and a use position, and

the locking member is configured to lock the fin portion in and release the fin portion from the use position.

2. The fin assembly of claim 1 wherein:

the support base comprises a channel extending along a longitudinal axis of the support base; and

the channel receives at least a portion of the fin base portion so as to movably couple the fin base portion to the support base.

3. The fin assembly of claim 2 wherein:

the channel comprises a first channel portion and a second channel portion; and

the fin base portion comprises a first pivot member positioned in the first channel portion and a second pivot member positioned in the second channel portion.

4. The fin assembly of claim 3 wherein the first pivot member and the second pivot member are spaced apart from each other on opposing end portions of the fin base portion.

5. The fin assembly of claim 3 wherein the first channel portion comprises a recess portion configured to receive and limit movement of the first pivot member when the fin portion is in the use position.

6. The fin assembly of claim 3 wherein the locking member is configured to engage with the second pivot member so as to lock the fin portion in the use position.

7. The fin assembly of claim 6 wherein:

the second pivot member comprises a groove; and

the locking member is configured to be positioned within the groove to limit movement of the second pivot member.

8. The fin assembly of claim 3 wherein:

the first channel portion comprises a first wall portion configured to limit movement of the first pivot member away from the support base,

the second channel portion comprises a second wall portion configured to limit movement of the second pivot member away from the support base, and

the fin base portion remains attached to the support base by the first wall portion and the second wall portion when the foldable fin is in the folded position.

9. The fin assembly of claim 2 wherein the support base comprises:

a mounting side portion configured to be mounted on the surface of the watersport board; and

an outward projecting portion extending along the longitudinal axis of the support base and projecting away from the mounting side portion of the support base.

10. The fin assembly of claim 9 wherein:

the outward projecting portion comprises the channel, and

the channel has an opening facing outward away from the mounting side portion of the support base.

11. The fin assembly of claim 9 wherein the outward projecting portion comprises a first wall and a second wall laterally spaced apart from each other by a distance to receive a middle portion of the fin base portion therebetween and provide lateral support to the fin base portion when the fin portion is in the use position.

12. The fin assembly of claim 1 , wherein the support base has a recess, and the fin assembly further comprises:

a retainer member received in the recess and configured to attach the locking member to the support base; and

a fastener configured to removably hold the retainer member to the support base.

13. A watersport system comprising:

watersport equipment having a surface; and

a fin assembly mounted to the surface of the watersport equipment, the fin assembly comprising—

a support base having a locking member, the support base being configured to attach the fin assembly to the surface of the watersport equipment, and

a foldable fin movably coupled to the support base, the foldable fin comprising a fin base portion coupled to the support base and a fin portion extending from the fin base portion, wherein:

the fin portion is movable between a folded position substantially parallel to the surface of the watersport equipment and a use position substantially perpendicular to the surface, and

the locking member is configured to lock the fin portion in and release the fin portion from the use position.

14. The watersport system of claim 13 wherein the watersport equipment is a board.

15. A method of using a fin assembly on watersport equipment, the method comprising:

moving a locking member to a release position;

moving a foldable fin in a first direction longitudinally relative to a support base;

moving the foldable fin away from the support base along a second direction of the support base that is different from the first direction; and

rotating the foldable fin along a rotation axis to place a fin portion of the foldable fin in a folded position.

16. The method of claim 15 , further comprising:

maintaining attachment of a fin base portion of the foldable fin to the support base when the foldable fin is in the folded position.

17. The method of claim 15 wherein the second direction is substantially perpendicular to the first direction.

18. The method of claim 15 wherein the second direction of the support base is substantially perpendicular to a surface of the watersport equipment to which the fin assembly is attached.

19. The method of claim 15 , further comprising:

removing a fastener that is configured to hold a retainer member in position so as to attach the locking member to the support base;

removing the retainer member;

removing the locking member; and

removing the foldable fin from the support base.

20. The method of claim 15 , further comprising:

rotating the foldable fin along the rotation axis;

moving the foldable fin toward the support base,

moving the foldable fin longitudinally relative to the support base to place the fin portion to a use position; and

locking the fin portion in the use position by rotating the locking member to a locked position.