Pen type injector

• Main Authors: WANG BAOLI, ZHANG YIBING, TANG YONGQUN
• Format: Patent
• Language: Chinese; English
• Published: 16.07.2024
• 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 pen type injector comprises a refill support, the rear end of the refill support is connected with an upper shell, and a push rod is installed in the upper shell and used for conveying medicine after moving according to the set dosage during injection. The follow-up rod sleeves the push rod and is used for driving the push rod to rotate during injection; the push rod seat is fixed in the upper shell, is in threaded connection with the push rod to drive the push rod to move forwards and is matched with the outer surface of the front end of the follow-up rod to enable the follow-up rod to only rotate unidirectionally and cooperate with injection to produce sound; the linkage cylinder is mounted outside the follow-up rod, can axially move along the follow-up rod, is matched with the maximum dose to adjust and limit, and can drive the follow-up rod to synchronously rotate during rotation; the locking sleeve is arranged outside the linkage cylinder in a threaded and sleeving manner, is used for differential ad