Patent ID: 8025455

Claim:
A fixing device for an extension tube of an exercise device comprising: an outer tube having a first opening laterally defined therein; an inner tube received in the outer tube, the inner tube having a second opening defined therein and completely communicating with the first opening; and a quick release device laterally mounted to an outer periphery of the outer tube and corresponding to the first opening, the quick release device includes: a bow secured on an outer periphery of the outer tube and co-axially corresponding to the first opening, the bow including an inner side, facing the first opening, having a first inclined plane and a second inclined plane respectively formed thereon, wherein the first inclined plane and the second inclined plane respectively and equally extend relative to a center line of the bow; a first clamp block received within the bow and sequentially extending through the first opening and the second opening, the first clamp block having a first face formed with a first guide plane slidably abutting the first inclined plane and a second face formed with a first clamp plane adapted for selectively securely abutting against an outer periphery of the extension tube that extending through the inner tube, a first through hole defined in the first clamp block between the first guide plane and the first clamp plane; a second clamp block received within the bow and sequentially extending through the first opening and the second opening, the second clamp block having a first face formed with a second guide plane slidably abutting the second inclined plane and a second face formed with a second clamp plane adapted for selectively securely abutting the outer periphery of the extension tube, a second through hole defined in the second clamp block between the second guide plane and the second clamp plane, the second through co-axially corresponding to the first through hole; a rod including a first end sequentially extending through the first through hole and the second through hole, and having a threaded portion formed thereon, a nut screwed onto the threaded portion and abutting against the second clamp block for adjusting a relative distance between the first clamp block and the second clamp block before fixing the extension tube; and a lever pivotally connected to a second end of the rod and a cam formed on the pivot end of the lever, by operating the lever with the cam and the nut, the distance between the first clamp block and the second clamp block can be quickly adjusted to make the first clamp block and the second clamp block fixing/releasing the extension tube.