| 摘要 |
<p>603636 Disclosed is an abdominal exercise device (10) to enhance exercising stomach and back muscles while avoiding adverse pressure on back and neck muscles. The abdominal exercise device (10) comprises a base frame (12); a back frame (14); a plurality of back cushions (20); a H-shaped seat frame; a seat cushion (30); a low friction journal bushing; a journal post; an arm (50); a pulley (60); a tension spring and resilient sleeves. The base frame (12) comprises a pair of side members and the back frame (14) also comprises a pair of side members (14a, 14b). The back frame side members (14a, 14b) are pivotally mounted near respective rears ends of the respective side members of the base frame (12) for movement between a forward upright position and a rearward recumbent position. The seat cushion (30) is fixed to the seat frame. The journal post is connected to a cross member of the base (12) and seat frames and received for rotation of the low friction journal bushing so that the seat cushion (30) may rotate with respect to the base frame (12). An arm (50) is located at each side of the base frame (12), and each arm (50) has a pair of extensions (50a, 50b) connected on of the base frame (12) and the seat frame. Each arm (50) includes a U-shaped handhold (50c). The pulley (60) is mounted for rotation at each side of base frame (12), near a rear end. The tension spring connects the base frame side members and the back frame side members (14a, 14b) biasing the back frame (14) towards the forward upright position. The resilient sleeve covers each spring and is engaged with one of the pulleys (60).</p> |
