Safe puncture needle

A safe puncture needle, comprising a needle holder (1), a base (2) and a needle tubing (3), wherein the needle tubing (3) comprises a needle tubing body (31) and a needle tubing tip (32) having a bent structure, the base (2) comprises a base body (21) and a guide block (22), the base body (21) is provided with a second inner space (210), an upper end and a lower end of the base body (21) are respectively provided with a first through-hole (2111) and a second through-hole (2121) communicating with the second inner space (210), the guide block (22) is provided with a third through-hole (221) and is connected to the base body (21) in the second inner space (210), a first end of the needle tubing body (31) penetrates the first through-hole (2111) and is connected to the needle holder (1), a second end opposite to the first end of the needle tubing body (31) is connected to the needle tubing tip (32) and penetrates the third through-hole (221), and the needle tubing body (31) is slidably connected to the guide block (22) at the third through-hole (221), and the needle tubing tip (32) is configured to retract through the second through-hole (2121);

• wherein the safe puncture needle further comprises a rivet member (4) comprising a flanging portion (41) and a main body portion (42) connected to each other, the rivet member (4) comprises a fourth through-hole (43) penetrating the flanging portion (41) and the main body portion (42), the main body portion (42) is slidably connected to the base body (21) along the first through-hole (2111), the needle tubing body (31) penetrates the fourth through-hole (43);
• the flanging portion (41) is a conical cylindrical structure, a dimension of an upper end of the flanging portion (41) in contact with the main body portion (42) in a plane perpendicular to the main body portion (42) is smaller than a dimension of a lower end of the flanging portion (41) in the plane perpendicular to the main body portion (42).