The present invention relates to a bottle body structure, particularly to a cosmetic airless bottle structure.

【Background technique】
Shown is a known cosmetic vacuum bottle structure, which includes: a bottle body 10, a gasket 20, and a pressure head 30. One end of the bottle body 10 has a bottle mouth 11, and the other end of the bottle body 10 has a bottle bottom 12 , The bottom of the bottle is provided with a vent 121, the gasket 20 faces the bottle mouth 11, the side of the bottle mouth 11 facing the gasket 20 is a first plane 111, the gasket 20 is arranged on the first plane 111 of the bottle mouth 11, and the pressure head 30 is locked at the mouth portion 11 of the bottle, and further includes a piston 13 disposed in the bottle body 10. The bottle body 10 is divided into a vent space 14 and a vacuum space 15 by the piston 13.

The vent space 14 is located at one end of the piston 13 The vent hole 121 communicates with the vent space 14. The vacuum space 15 is located at the other end of the piston 13. The piston 13 has an airtight ring portion 131 which is tightly attached to the inner side wall of the bottle body 10, thereby The ventilation space 14 and the vacuum space 15 are isolated, the cosmetics are contained in the vacuum space 15, and the piston 13 is used to push the cosmetics inside the bottle body 10.

 However, the known cosmetic vacuum bottle structure only uses the gasket 20 to increase the tightness and vacuum between the bottle body 10 and the indenter 30, and when the gasket 20 is installed, a torsion force of ten kilograms of the gasket 20 must be applied to it. Make the gasket 20 and the first plane 111 of the bottle mouth 11 completely close to achieve a vacuum effect, and the above-mentioned steps of applying the gasket 20 to ten kilograms of torque are often completed by manpower, and it is difficult to control the airtight effect and assembly quality.

Because of the aforementioned manual assembly process, the air-tightness of the air-tight bottle is not good, so that the air outside the bottle body 10 enters the inside of the bottle body 10, destroys the vacuum inside the bottle body 10, and makes the inside of the bottle body 10. Cosmetics are exposed to outside air, which will cause cosmetic deterioration or deterioration over time.

The vacuum bottle introduces outside air into the vent space 14 inside the bottle body 10 through the vent hole 121 in the bottom 12 of the bottle, and the vent space 14 and the empty space 15 are isolated by the airtight ring portion 131 of the piston 13 so that air will not pass through the vent space 14 Introduce the vacuum space 15 to generate an air pressure difference in the bottle body 10, and push the piston 13 through atmospheric pressure to push the piston 13 toward the vacuum space 15.

The piston 13 slides in the bottle body 10 while sliding The cosmetics are pushed in the direction of the pressure head 30, so that the vacuum bottle structure of the cosmetics can smoothly output the cosmetics without the use of a straw, and there will be no cosmetics remaining on the side wall inside the bottle body 10