| 摘要 |
A square lamp post insertional conjoinment structure comprised of a slip-mount tube and a casing tube fitted onto the slip-mount tube. The slip-mount tube has disposed at one end an internal binding sleeve and, furthermore, an insertional conjoinment section of a stepped arrangement is formed between the exterior of the internal binding sleeve and the interior of the slip-mount tube at two opposing sides and a spring is installed in each insertional conjoinment section. The casing tube has engagement blocks aligned with the springs. When the casing tube is fitted onto the slip-mount tube, its engagement blocks press inward against the springs to facilitate the sleeving on of the casing tube. After the casing tube engagement blocks have passed the springs, the springs rebound to their original positions, locking the casing tube onto the slip-mount tube and thereby achieving the fixed coupling of the casing tube and the slip-mount tube.
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