Seal ring and puncture cannula with same
A sealing ring and sleeve seat technology, applied in the field of medical devices, can solve the problems affecting the use of the trocar, the wear of the elastic sealing cap, the turning out of the elastic sealing cap, etc., and achieve the effects of preventing wear or even rupture, enhancing elasticity and prolonging the service life.
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[0031] Such as Figure 1-5 Said, the sealing ring of the present invention includes a soft rubber cone ring 1, the center of the soft rubber cone ring 1 is provided with a through hole 2, and the soft rubber cone ring 1 is preferably made of a thermoplastic elastomer material In this embodiment, the soft rubber conical ring 1 is made of styrene-based thermoplastic elastomer. In other embodiments, it can also be made of thermoplastic polyurethane elastomer. The styrene-based thermoplastic elastomer and thermoplastic polyurethane elastic The entities are well known to those skilled in the art and will not be described in detail here. The sealing ring also has several hard films 3 for covering the inner wall 14 of the soft rubber conical ring, and the lower end 15 of the through hole exceeds the lower end of the hard film 3 . The hard film 3 can be a shape suitable for covering the inner wall 14 of the soft rubber conical ring, such as a triangle or a sector, and its size can be...
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