Structural improvements of telescopic poles

Abstract

This invention relates to a structural improvement of a telescopic rod, comprising a first outer tube, a first outer connecting portion, a plurality of second outer tubes, a plurality of second outer connecting portions, a plurality of second outer connecting portions, a first inner tube, a first inner connecting portion, a plurality of second inner tubes, a plurality of second inner connecting portions, a plurality of second inner connecting portions, and a hydraulic cylinder. The telescopic design of the first inner tube and the plurality of second inner tubes serves as the lifting push rod of the hydraulic cylinder, achieving an extended length of more than twice the original length with a simple structure. The first outer tube and the plurality of second outer tubes are movably sleeved on the outside, allowing the first outer connecting portion, the second outer connecting portion, the second outer connecting portion, the second inner connecting portion, and the second inner connecting portion to rise and fall synchronously with the first inner tube and the second inner tube, thereby increasing structural strength while maintaining the contracted volume and accommodating the storage volume.

Claims

1. An improved structure of a telescopic pole, wherein the telescopic pole comprises: A first outer tube body; a first outer connecting portion disposed at the bottom end of the first outer tube body; a plurality of second outer tube bodies, each of the second outer tube systems being movably sleeved on top of the first outer tube body, with the innermost second outer tube system being movably sleeved on top of the first outer tube body; a plurality of second outer connecting portions disposed at the bottom end of each of the second outer tube bodies; a plurality of second outer connecting portions disposed at the top end of each of the second outer tube bodies, such that the second outer tube bodies are extended and limited by the corresponding engagement of adjacent second outer connecting portions and second outer connecting portions, and that the outermost second outer tube body is extended and limited by the corresponding engagement of the second outer connecting portion and the first outer tube body; a first inner tube body disposed within the first outer tube body, with the top of the first inner tube body connected to the top of the first outer tube body, such that the first inner tube body and the first outer tube body rise and fall synchronously; a first inner connecting portion disposed at the bottom end of the first inner tube body; A plurality of second inner tubes are movably fitted together, with the innermost second inner tube movably fitted outside the first inner tube; a plurality of second inner connecting portions are respectively provided at the bottom end of each second inner tube; a plurality of second inner connecting portions are respectively provided at the top end of each second inner tube, so that the second inner tubes are extended and limited by the corresponding engagement of adjacent second inner connecting portions and second inner connecting portions, and the innermost second inner tube is extended and limited by the corresponding engagement of the second inner connecting portion and the first inner tube; and a hydraulic cylinder is used to inject oil into the first inner tube, so that the first inner tube and each of the second inner tubes are extended by hydraulic pressure.

2. The structural improvement of the telescopic rod as described in claim 1, wherein the maximum width of the second outer joint of the outermost second outer tube is greater than that of the second outer tube.

3. An improved structure of the telescopic rod as described in claim 1, wherein the first inner joint has a first seal.

4. An improved telescopic rod structure as described in claim 1, wherein each of the second inner mating portions has a second seal.

5. An improved structure of the telescopic rod as described in claim 1, wherein the surfaces of the first outer tube and the second outer tube have a protective layer.

6. A structural improvement of the telescopic rod as described in claim 1, wherein the extension direction of the telescopic rod is opposite to the direction of gravity.

7. A structural improvement of the telescopic rod as described in claim 1, wherein the retraction action of the telescopic rod is achieved by gravity.

8. A structural improvement of the telescopic rod as described in claim 1, wherein the maximum extended length of the telescopic rod is greater than twice the minimum retracted length of the telescopic rod.

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