Drug infusion device for tumor interventional therapy

A drug infusion device for tumor interventional therapy, comprising:

• a fixing base (1), configured to be circumferentially fixed to an outer side of the human body adjacent to a tumor site;
• a rotating support frame (2), slidably connected to the fixing base (1);
• a locking assembly (3), used for locking the rotating support frame (2) with the fixing base (1);
• and
• an infusion apparatus (4), mounted on the rotating support frame (2) for infusing drug;
• and
• wherein the fixing base (1) comprises a flexible bottom plate (11), an elastic sliding rod (12), a buckle strap (13) and two flexible straps (14);
• the two flexible straps (14) are fixedly connected to two ends of the flexible bottom plate (11), and the elastic sliding rod (12) is fixedly connected to the flexible bottom plate (11);
• and the buckle strap (13) is fixedly connected to one of the flexible straps (14) for locking the two flexible straps (14);
• wherein the rotating support frame (2) comprises a top support frame (21), a rotating table (22) and a clamping assembly (23), one end of the top support frame (21) is slidably connected to the fixing base (1), and the other end is rotatably connected to the rotating table (22);
• and the clamping assembly (23) is fixedly connected to the rotating table (22);
• and
• wherein the top support frame (21) comprises a four-link structure (211), a sliding sleeve I (212), and a sliding sleeve II (213);
• the sliding sleeve I (212) is movably connected to the fixing base (1);
• the sliding sleeve II (213) is rotatably connected to the fixing base (1);
• two ends of the four-link structure (211) are rotatably connected to the sliding sleeve I (212) and the sliding sleeve II (213);
• the four-link structure (211) is formed by a drive rod (2111), a movable rod (2112), a driven rod (2113) and the elastic sliding rod (12) together, in which one end of the drive rod (2111) is rotatably connected to the sliding sleeve I (212), the other end of the drive rod (2111) is rotatably connected to one end of the movable rod (2112), the other end of the movable rod (2112) is rotatably connected to one end of the driven rod (2113), and the other end of the driven rod (2113) is rotatably connected to the sliding sleeve II (213);
• the movable rod (2112) of the four-link structure (211) is rotatably connected to the rotating table (22);
• and a length of the drive rod (2111) is different from a length of the driven rod (2113);
• wherein the infusion apparatus (4) comprises a puncture needle (41), a flow guide needle (42), a driver (43), a limiting stopper (44) and a sealing structure (45);
• the puncture needle (41) is used for puncturing a patient's blood vessel;
• the flow guide needle