Bottom-fillable spray bottle

A bottom-fillable spray bottle, comprising:

• a bottle body with an accommodating cavity provided therein;
• a liquid spraying assembly provided on the bottle body for realizing liquid spraying of the spray bottle;
• a vent assembly comprising a first sealing ring, an ejector pin and a first elastic member, a vent hole being provided near a top of the bottle body, and the first sealing ring for interference fit being arranged between the ejector pin and the bottle body;
• and
• a liquid injection assembly mounted at a bottom of the bottle body, comprising a liquid inlet nozzle and a bayonet, wherein the liquid injection assembly is arranged at an opening at the bottom of the bottle body, and the bayonet releasably seals the opening, the bayonet is provided with a first liquid inlet channel, the liquid inlet nozzle is arranged at a bottom of the bayonet, the liquid inlet nozzle is provided with a second liquid inlet channel, and the bayonet is provided with a third liquid inlet channel communicated with the first liquid inlet channel;
• when the liquid inlet nozzle pushes a part of the bayonet into the opening so that the third liquid inlet channel enters the opening and enables the third liquid inlet channel to be above the opening, the first liquid inlet channel, the second liquid inlet channel, the third liquid inlet channel and the accommodating cavity are communicated with each other, and when the bayonet seals the opening, the third liquid inlet channel and the accommodating cavity are not communicated with each other;
• and the bayonet is in sealing fit with an inner wall of the bottom of the bottle body;
• wherein one end of the ejector pin is provided with the first elastic member, and the bayonet is connected with the other end of the ejector pin, so that movement of the bayonet drives the ejector pin to move, and thus the ejector pin with a first sealing ring releasably seals the vent hole.