Multi-level freely telescopic rod

Abstract

The invention discloses a multi-level freely telescopic rod. The telescopic rod comprises n levels of outer pipes, n levels of positioning elastic pieces, n levels of positioning pieces and n levels of rotating inner pressing pieces, wherein n is a natural number. The telescopic rod further comprises (n+1) levels of inner pipes, an (n+1)th level of outer pipe, an external rotating piece and a spring, wherein inner walls of each level of outer wall is evenly provided with a plurality of sawtooth-level positions, each level of positioning piece is provided with notches, one end of each level of positioning elastic piece is correspondingly fixed in each level of positioning piece, and the other end of each positioning elastic piece penetrates through the notches on each level of positioning pieces and is then clamped with the sawtooth level positions of each outer pipe. A non-level state can be considered as long as the sawtooth level positions of the inner walls of the outer pipes are dense enough, and the length of the telescopic rod can be extended according to occasion requirements. When the extended length is confirmed, motion is stopped, and the positioning elastic pieces and the sawtooth level positions are automatically locked after being clamped. When the rod is retracted, only the external rotating piece needs controlling, and a plurality of segments of the rod can be simultaneously retracted; and when operations are finished, the telescopic rod automatically returns.

Description

technical field [0001] The invention relates to a telescopic rod, in particular to a multi-stage free telescopic rod. Background technique [0002] At present, the telescopic principle is used on the photography stand or the guide rod for the blind. The user stretches it to a certain length when it needs to be used, and recycles it when it is not used. It can effectively achieve the effects of small size, flexible use, and convenient portability. Therefore, during the use of the telescopic rod for photography or the telescopic rod for the blind, it often performs stretching or recycling actions, and the locking methods of these two actions mainly include the following types: [0003] One is to lock with a locking piece or need to be pulled to a fixed position to lock. If the existing telescopic rod uses the pin hole and the adaptation of the pin rod installed on the shrapnel to achieve stretching or recovery , when in use, it is necessary to press the pin rod hard so that t...

AI Technical Summary

Problems solved by technology

The difference between the diameters of the pipes at all levels is used to realize the fast connection of the two connected telescopic rods. However, during use, when there is vibration or unsuitable strength (not enough or too much strength), it is easy to loosen or loosen. Recycling is not easy to operate, especially when multiple sections are locked, it often happens that some sections are locked too tightly, while some sections are not locked tightly

The above-mentioned telescopic rod has defects such as inconvenient operation, time-consuming and labor-intensive, etc.

[0005] In addition, the inner wall of the existing telescopic rod is mostly single-stage, and the user cannot achieve multi-stage telescopic expansion according to his own needs during use.

Therefore, the telescopic rod is limited by space when it is in the overall telescopic state, and when a larger telescopic trip is required, the telescopic rod cannot be used

[0006] Through the above description, the existing telescopic poles can no longer meet the needs of the market

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