Connecting structure of extension tube and needle cylinder

• Main Authors: ZHENG ZHEFENG, XU WANGWANG, XIE HONGQIONG
• Format: Patent
• Language: Chinese; English
• Published: 30.06.2023
• Subjects: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROMTHE BODY; HUMAN NECESSITIES; HYGIENE; MEDICAL OR VETERINARY SCIENCE

The utility model discloses a connecting structure of an extension tube and a needle cylinder, which comprises the needle cylinder, a conical needle cylinder nipple is integrally formed at the injection end of the needle cylinder, and a positioning ring is integrally formed at one end, close to the needle cylinder, of the needle cylinder nipple; an insertion cavity which is the same as the needle cylinder nipple in shape is formed in the extension tube connector, and a fixing ring is integrally formed at the end, close to the needle cylinder, of the extension tube connector. The extension tube connector is inserted into a needle cylinder nipple, in the inserting process, the abutting block moves towards the interior of the containing cavity along the gradient of the fixing ring, when the abutting block moves to the position in front of the fixing ring, the abutting block does not have supporting force of the fixing ring, and at the moment, resilience force of the spring drives the abutting block to stretch ou