| 摘要 |
607907 A punching bag 2 is suspended from a support structure, typically by elastic cords 5,6 to ceiling and floor. An arm 27 is mounted to a joint 8 between the suspension and the bag and the joint has a rod end bearing mounted to a shaft of the joint 8 and fixed axially into the arm 27 so as to allow more random swivelling of the arm 27 as the bag 2 is struck. |
