Automatic administration instrument for medical use

An automatic administration instrument for medical use for injecting a drug solution filled in a syringe, the automatic administration instrument comprising:

• a body for housing the syringe and an injection needle;
• a first motor for sliding the syringe within the body in a direction toward a tip of the injection needle such that the injection needle protrudes from the body;
• a second motor for operating the syringe to administer the drug solution;
• a motor activate switch provided on the body, the motor activate switch activating the first motor and the second motor in sequential order while a part of an exterior of the body is being pressed against a body region of a patient to which the drug solution is to be administered;
• a skin touch switch for detecting that the body is pressed against the body region where administration is to be carried out;
• and
• a microprocessor for controlling the first motor and the second motor,
• wherein the skin touch switch, which is arranged on a surface of the body configured to contact the body region of the patient when the drug solution is being administered, is configured to detect whether or not the body is in contact with the body region to be administered while the injection needle is not protruding from the body, and
• wherein the microprocessor is configured to control the first and second motors so that, when the motor activate switch is pressed in a state where the skin touch switch detects the contact with the body region to be administered, the first motor is activated such that the injection needle protrudes from the body to perform needle insertion into the body region of the patient, and thereafter the second motor is activated to administer the drug solution.