To provide a medical rubber stopper which has functions for preventing coring and leakage of a liquid and shows the resistance to pressure.
In the medical rubber stopper applied to a mixed injection tube 1, a rubber stopper body 3 is placed on an end surface 11 of the opening part 10 of the main body 2 of the mixed injection tube and is fixed by attaching a cap 4 thereon. Since the rubber stopper body 3 has the peripheral edge restrained and hermetically sealed by keeping only the peripheral edge between the end surface 11 of the opening part 10 of the main body 2 of the mixed injection tube and the cap 4 from the top and the bottom, the leakage of the liquid is prevented. Moreover, since the central part of the rubber stopper 3 punctured by a needle shows no internal stress or small internal stress, the puncture resistance in puncturing the needle is small, and the coring is prevented by preventing the cutting of a rubber piece at the distal end of the needle in puncturing the needle. Since the leakage of the liquid along the circumference of the opening part 10 is prevented by protrusions 12, 15 each of which is provided continuously in the circumferential direction on the bottom surfaces of the end surface 11 of the opening part 10 of the main body 2 of the mixed injection tube and the cap 4, the required resistance to pressure as the medical rubber stopper is equipped.
| JPS5873549 | MANUFACTURE OF CAP FOR PERFUME AND ITS CAP |
| JPH11319031 | UNIVERSAL PLUG |
| JP2004011697 | PLUG MEMBER FOR AIR VENTILATION |
OKUI YOSHIHITO
TAKEUCHI TOSHIAKI
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Hideka Tanaka
Yoshiyuki Shiraishi
Kunihiko Shiromura
Tsuyoshi Kumano
Hiroaki Yamane