CPC F21V 17/101 (2013.01) [F21K 9/272 (2016.08); F21S 4/28 (2016.01)] | 9 Claims |
1. A lamp tube structure capable of preventing glue from overflowing, comprising a hollow tube body and a cap body covering an opening of the hollow tube body, wherein an inner surface of the cap body is provided with a plurality of protrusion portions, and the protrusion portions are ring-shaped and arranged to be parallel with each other, wherein a glue is distributed over the inner surface of the cap body and the protrusion portions are configured to prevent the glue from overflowing, and an outer surface of the hollow tube body contacts the protrusion portions, wherein the protrusion portions include a first protrusion portion and a second protrusion portion, and the first protrusion portion and the second protrusion portion are circular and cross-sections of the first protrusion portion and the second protrusion portion are conical.
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