Patent No. EP4230241 (titled "Automatic Syringe") was filed by Shandong Wego Prefills Pharmaceutical Packaging on May 24, 2021. The application was issued on Mar 12, 2025.
An automatic syringe with a simplified structure and improved reliability, comprising a housing, needle guard cover, push rod, prompting cylinder, inner tube, release ring, driving elastic member, and resetting elastic member. The syringe features a syringe fixing structure, anti-dropping recess-protrusion engaging structure, and prompting-cylinder limiting structure to ensure reliable operation and easy assembly.

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