Needleless skin deep filler injection device

A needleless skin deep filler injection device, comprising:

• a gun body, wherein an accommodating cavity is provided in the gun body;
• an injection tube provided at a front end of the gun body and configured to store a to-be-injected liquid;
• an injection driving structure provided in the accommodating cavity, connected to the injection tube through a liquid pushing rod, and configured to inject the to-be-injected liquid in the injection tube;
• a negative-pressure freezing structure sleeved on a front end of the injection tube and configured to form a negative pressure between an injection port of the injection tube and a human skin for cooling;
• and
• a knock wall-breaking structure provided in the accommodating cavity, connected to a wall of the injection tube, and configured to transfer low-frequency vibration to the human skin through the injection tube and the negative-pressure freezing structure,
• wherein the knock wall-breaking structure comprises a first driving device fixed in the accommodating cavity;
• wherein
• an output end of the first driving device is connected to a hammer body, and a vibrating member fixed on a sidewall of the accommodating cavity is provided at a side of the hammer body;
• a fixed member is provided between the gun body and the injection tube, and the fixed member is fixed on a front-end surface of the gun body;
• and
• when the first driving device works, the hammer body is pulled back and forth at a predetermined frequency, such that the hammer body knocks the vibrating member to transfer vibration to the human skin through the fixed member, the injection tube and the negative-pressure freezing structure.