A kind of needle-free joint structure of what is closed in this creation system,This needle-free joint structure include hollow joint,Spring and switch block,Hollow joint both ends have the first passage and second channel of connection,First passage periphery, which extends internally, ring block,Ring block inner peripheral forms the first ring wall,And the second ring wall is formed between first passage what ring block and second channel； Spring retention is in first passage； Switch block has stop part and is connected with conduit from stop part,Stop part is sincere between ring block and spring by folder,Conduit wears what second channel,The outer peripheral edge of stop part be formed with abut the first ring wall the first ring portion,And the second ring portion of the second ring wall is abutted,And stop part is equipped with the groove of connecting tube between the first ring portion and the second ring portion. Thereby, whole structural stability is improved, and reaches good sealing effect, cannot be introduced into outside air in joint structure completely.本創作係關於一種無針式接頭結構，此無針式接頭結構包括中空接頭、彈簧及開關組件，中空接頭兩端具有連通的第一通道及第二通道，第一通道周緣向內延伸有環塊，環塊內周緣形成第一環壁，並第一通道於環塊及第二通道之間形成第二環壁；彈簧容置在第一通道；開關組件具有止擋件及自止擋件連接有導管，止擋件被夾摯在環塊及彈簧之間，導管穿設於第二通道，止擋件的外周緣形成有抵接第一環壁的第一環部、及抵接第二環壁的第二環部，並止擋件在第一環部及第二環部之間設有連通導管的溝槽。藉此，提高整體的結構穩定度，並達到良好的封閉效果，使外界空氣完全無法進入接頭結構內。
