Patent ID: 11969744
Assignee: SHENZHEN BONA PHARMA TECHNOLOGY CO., LTD.
Field: Chemical engineering (Chemistry)
Classification: CPC A  B | IPC A  B

Claim 5:
6. The sterile spray pump as in claim 1, wherein an air channel (130) is formed between the main piston (30) and the spray head (40), an outer periphery of the main piston (30) is provided with a ring of upper clamping portion (307) protruding outwards in a radial direction, and an inner periphery of the spray head (40) is provided with a ring of lower clamping portion (401) protruding inwards in a radial direction; when the spray head (40) is not pressed down, the upper clamping portion (307) abuts against the lower clamping portion (401), and a space between the lower clamping portion (401) and the main piston (30) is sealed; after the spray head (40) is pressed down, the upper clamping portion (307) is separated from the lower clamping portion (401), and the seal between the lower clamping portion (401) and the main piston (30) is released; and one end of the air channel (130) communicates with the exterior of the sterile spray pump, and the other end of the air channel (130) communicates with the second compression space (20) through the second exhaust member (503).