Pneumatic cylinder with vacuum suction and pressure regulation capable of tightly sucking stump and prosthetic sleeve together to greatly reduce weight feeling of prosthetic during walking and enable users walking gesture becoming more natural
The present invention provides a pneumatic cylinder with vacuum suction and pressure regulation, which comprises a pneumatic cylinder, which is configured therein with a fixed isolation plate, and a piston member slidably disposed inside the fixed isolation plate. The center of the piston member is configured with an airtight piston with an air volume adjusting screw, and the end is configured with a second airtight piston. As such, the interior of the pneumatic cylinder is formed with a first air chamber, a second air chamber and a third air chamber that all the air chambers are connected with a sleeve. When the piston member is moving, the air may flow into and out of the pneumatic cylinder, such that the volumes of the air chambers can be adjusted corresponding to the space. The variation of air chamber volumes may vacuum the interior of the sleeve, so that the stump and the prosthetic may be tightly sucked together and the weight feeling of the prosthetic during walking may be greatly reduced, and the pressure of each air chamber may be balanced and naturally stabilized in response to walking operation of the user. The channel inside the piston member is further configured with a floating piston and an airflow reduction screw, so the air flow in the third air chamber may be regulated to be suitably reduced and discharged, and the user cannot only obtain the power for quick walking, but also maintain the safety in use.本創作係為一種真空吸引及壓力調節氣壓缸,包括有一氣壓缸,其內部設有一固定隔絕板,一活塞件滑設於該固定隔絕板內,且該活塞件中央設有具氣量調整螺絲的一氣密活塞,並於該活塞件末端設有一第二氣密活塞,藉此於氣壓缸內部構成第一氣室、第二氣室、以及第三氣室且氣室與套筒相連接,當活塞件位移時,配合氣流流動進出該氣壓缸,使上述各個氣室的體積得以調節對應空間,且利用氣室體積變化將套筒內抽成真空,使殘肢與義肢能緊密吸合,大大減少行走時義肢的重量感,並藉以配合使用者於步行動作中達到各氣室壓力平衡且自然穩定,且該活塞件內的通道還設有一浮動活塞與一氣流減量螺絲,能使第三氣室內的氣流調節以適當減量排出,讓使用者得以獲得快步行走的動力外,亦能保有使用上的安全性。1‧‧‧氣壓缸11‧‧‧固定隔絕板111‧‧‧穿孔112‧‧‧單向閥2‧‧‧活塞件21‧‧‧第一氣密活塞22‧‧‧氣量調整螺絲24‧‧‧第二氣密活塞25‧‧‧氣流減量螺絲26‧‧‧浮動活塞3‧‧‧第一單向閥31‧‧‧濾心32‧‧‧單向閥4‧‧‧第二單向閥41‧‧‧單向調整閥5‧‧‧套筒單向閥
