| 摘要 |
An adjustable walking cane includes an inner tube, an outer tube, a connecting rod, a pushing unit and an extending unit. A spring compresses the connecting rod against the extending unit and the pushing unit, a resilient sleeve bears against the inner threaded segment on the outer tube, and then the length of the outer tube and inner tube can be fixed. In the extending process, the inner tube and the outer tube extend outwardly by pulling the cane from two ends thereof, and the inner tube and the outer tube are released from compression while the resilient sleeve is detached from the inner threaded segment. In the retracting process, the inner tube and the outer tube are released from compression while the extending pieces on the extending unit driven by controlling unit is detached from the taper surface of the pushing unit. |
| 主权项 |
1. An adjustable walking cane comprising:
an inner tube connecting to a first handle at one end, a protruding portion formed at the other end thereof; and a control unit disposed near the first handle; an outer tube comprising a non-slip plug received at one end and a restricting cover secured on the other end, and a block portion formed inside the restricting cover to engage with the protruding portion of the inner tube when the inner tube is received in the inner tube, and an inner threaded segment formed at an inner surface of the outer tube; a connecting rod connecting with the controlling unit at one end, and a threaded segment formed at the other end and connected to the outer tube, and a blocking piece formed at a central portion of the connecting rod; a pushing unit having a tapered surface at one end and secured at an open end of the protruding portion of the inner tube, and a connecting portion formed at the other end thereof; and a rod hole formed at a top portion of the pushing unit for the threaded segment of the connecting rod to penetrate, and a spring formed between the pushing unit and the blocking piece; an extending unit comprising an axial pore for connecting to the threaded segment of the connecting rod, and a nut fastened on the threaded segment for securing the extending unit and the pushing unit, wherein a plurality of extending pieces are formed around the connecting rod, and a resilient sleeve is disposed at an outer portion of the extending pieces, wherein the extending pieces compress against the taper surface of the pushing unit, while the resilient sleeve is compressed against the inner threaded segment on the outer tube, so the length of the outer tube and the inner tube is fixed. |
