Applicator for inserting an in vivo analyte sensor

An applicator for inserting an in vivo analyte sensor, comprising:

• a base;
• a contact member, the contact member being movably connected to the base, wherein a side of the contact member facing a human body is defined as a contact side;
• a transmitter bracket connected to the base;
• a locking portion disposed on the transmitter bracket or the base;
• a guide needle bracket disposed on the transmitter bracket, wherein the locking portion is in contact with the guide needle bracket to lock the guide needle bracket on the transmitter bracket;
• an elastic member;
• a transmitter connected to the transmitter bracket;
• and
• a guide needle connected to the guide needle bracket;
• wherein the contact member is provided with an unlocking portion;
• the base is configured to be movable toward the contact side to drive the unlocking portion into contact with the transmitter bracket, thereby releasing the locking of the guide needle bracket by the locking portion;
• the elastic member is configured to drive the guide needle bracket to move away from the transmitter bracket when the locking portion is released, thereby driving the guide needle to retract from the human body.