| CPC A61G 17/0106 (2017.05) [A61G 17/004 (2016.11); A61G 17/007 (2013.01); A61G 17/02 (2013.01); A61G 17/024 (2017.05); A61G 17/041 (2016.11)] | 8 Claims |

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1. A coffin with a lower side and an upper side, comprising:
a structure that includes:
a first frame located on the lower side;
a second frame located on the upper side;
a plurality of ribs connected to the first frame and protruding towards the upper side connecting the second frame with said first frame;
a cover surface connected to the ribs;
an inner lid with an arcuate shape arranged on an inner side of the second frame, wherein ends of the inner lid lay on the ribs;
an outer lid arranged on the second frame; and
a fastening mechanism configured to join the outer lid to the second frame arranged on the cover surface.
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