| 摘要 |
An assembly of a glasses frame and two legs provides a tool-free, self-assembly and most secured frame-leg attachment contributed by a three-dimensional frame-leg contact structure, which is created by a mortise-tenon contact plane, as well as a protruding piece embedded therein. The mortise-tenon contact plane is formed by a frame tenon extending from the side of a frame, and flexibly received in a corresponding leg mortise on the upper end of the leg. The frame tenon is further refined into two planes of different sizes to enhance the stability of frame-leg attachment.
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