It seems that the design of the hinge solves the problem of power distribution to some extent. The next plan is to optimize the silicone part so that it has less bulge at the top. A better solution, for now, would be to thicken the top and bottom and then reduce the thickness of the ends. When air is injected, the entire silicone model will lengthen rather than bulge.
We rebounded the old silicone as a test model, and were finally able to get a seal without leaks. The test was a success:
The new ABS model has been pointed out by Skylab. Next, we will test the new model.