Stagelessly adjustable telescopic walking stick with a position retaining device

Abstract

A stagelessly adjustable telescopic waking stick having a position retaining device is made up of an upper pipe and a lower pipe that are telescopically adjusted so as to permit the walking stick to be extended to any length within a limited range and be firmly retained at any selected length by the position retaining device so as to permit the telescopic walking stick to be suitable to people of various physical sizes.

Description

BACKGROUND OF THE INVENTIONThe present invention relates to a stagelessly adjustable telescopic walking stick having a position retaining device so as to permit the walking stick to be extended to any length within a limited range and be firmly retained at any selected length so as to permit the telescopic walking stick to be used by people of various physical sizes.In general, walking sticks are manufactured in a number of fixed sizes and people of different physical sizes must choose a proper walking stick best meet their physical sizes. Such way of producing walking sticks of fixed sizes make the stocks in the warehouse of a factory or stores piled up easily.To solve the problem, length adjustable walking sticks have been developed for many years. The conventional adjustable walking sticks are designed to have an upper pipe and a lower pipe having a plurality of evenly spaced retaining holes defined thereon. The upper pipe is equipped with a pair of retractable locking buttons wh...

AI Technical Summary

Benefits of technology

Therefore, the primary object of the present invention is to provide a stagelessly adjustable walking stick having a position, retaining device which enables a user to vary the length of the walking stick in a random manner within a limited range.

Another object of the present invention is to provide a stagelessly adjustable walking stick having a position retaining device equipped with an eccentrically driven retainer and having an expandable plastic tube having inner threads. The plastic tube is made up of two separable portions bound together by a C-shaped clamp, one portion has an eccentrically located engagement protrusion to which an eccentric circular disk is secured by a screw. A cone-shaped taper means having one end secured to one end of a lower pipe of a walking stick and having the other end provided with a threaded post which can be engaged with the inner threaded face of the plastic tube and make the taper means proceed forwardly or withdraw backwardly, resulting in the outward expansion of the clamp bound plastic tube when the lower pipe is rotated to move upwardly, making the eccentric circular disk and the eccentric retainer both housed in the upper pipe abut against the inner wall of the upper pipe respectively in such a manner that the retainer of the taper means mounted onto the end of the lower pipe can proceed forwardly to expand outwardly the plastic tube whereby the upper pipe and the lower pipe can be firmly locked together by the expanded plastic tube at a selected length.

Problems solved by technology

1. The evenly spaced retaining holes on the lower pipe are not defined in such a manner that a precise length can be easily obtained in one aspect; and the operation on the retaining buttons and the selection of proper retaining holes are relatively difficult for the aged people in another aspect.

2. The disposition of the retaining holes on the lower pipe makes the strength of the lower pipe weakened and the surface of the same spoiled.

3. The drilling of the retaining holes on the lower pipe makes the production of a walking stick complex and the manufacturing cost thereof relatively high.

4. A personal walking stick is usually used only by an individual constantly and the retaining holes are almost fixed without shift, rendering easy damage to the retaining holes and shortening the operation life of such a walking, stick after a period of time.

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