| 摘要 |
Swim fin (1) comprising a foot portion (2) intended to accommodate and be attached to a user's foot, which foot portion (2) embraces at least one toe portion (3) having a foot sole, at least one arm (4), which is attached to the foot portion (2) and which projects forward, and at least one blade (5), the at least one blade (5) being limitedly pivotally attached to the arm (4). The arm (4) is rigidly attached to at least the toe portion (2) while forming an angle (α) defined as the angle between the foot sole and the axial direction of the arm (4), which angle amounts to between approx. 20 and 60°, and that the arm is rigid. |
| 主权项 |
1. Swim fin comprising a foot portion in the form of a sport boot that extends at least past an ankle of a user of the swim fin so as to transform a force from a lower leg to the swim fin,
wherein two mutually spaced apart arms are rigidly attached to the sport boot, whereby said arms and said sport boot are formed integrally, at least one blade being limitedly pivotally attached relative to the arms and extending between the same, wherein said arms projects forward while forming a first angle defined as the angle between a foot sole and an axial direction of the arm, wherein the first angle is between 20 and 60°, wherein said swim fin further comprises a change-over mechanism to allow change-over of said blade between two fixed angle intervals for the provision of forwardly acting and backwardly acting, respectively, motion of the swim fin when executing leg kicks for forward motion, and wherein at one arm, the change-over mechanism comprises an actuation handle, a lock strip having lock shoulders, which lock strip is biased by means of a spring toward an arresting state of the lock strip, and wherein the lock strip is actuatable by means of the actuation handle under mediation of an actuation member between a locking state, in which the blade can move between fixed angle intervals and in which it is arranged to co-operate with stop shoulders arranged at one side of the blade, and an idle state in which the blade is freely rotatable. |
