Central tube structure for bed and chair
The present invention relates to a central tube structure for bed and chair. It is mainly related to install a ring of flange projecting inwardly on the internal side of the bottom of its central linkage body. A ring of groove is fit at the coordinating location of the bottom of the top sleeve and t...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The present invention relates to a central tube structure for bed and chair. It is mainly related to install a ring of flange projecting inwardly on the internal side of the bottom of its central linkage body. A ring of groove is fit at the coordinating location of the bottom of the top sleeve and the said linkage body, which wedges the flange with the groove to make the combination of the two more stable when the said top sleeve combines with the central linkage body. Therefore, it is not easy to be loosened or damaged when being installed on beds, chairs or office chairs to use. And the purpose of prolonging its lifespan is further achieved. |
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