Backstop bottle cap and its check valve

Abstract

A non-return bottle cap and its check valve. The non-return bottle cap includes: a body in which a check valve and an injection piece are fixed; the check valve has a valve plate and several injection holes , when the valve plate covers the supporting part of the body and seals the through hole, the injection hole is closed, and the check valve is in a closed state; the valve plate can be elastically deformed under the pressure from the through hole The arched valve plate makes the through hole fully open, the injection hole is unblocked, and the check valve is in the released state; the body is combined with a threaded part of the threaded mouth of a plastic bottle, and the released state The unique check valve allows the contents of the bottle to be released through the non-return cap, and the closed check valve ensures that the contents released from the plastic bottle will not flow back into the bottle, and also ensure that the outside air will not enter the plastic bottle middle.

Description

technical field [0001] The present invention relates to bottle caps, more specifically, a bottle cap for preventing backflow. Background technique [0002] It is known that liquid, colloidal, or thick substances such as beverages, seasonings, and medicaments are mostly filled in plastic bottles. Liquid substances can be directly poured into the container and released from the mouth of the bottle or the outlet of the bottle cap, while the colloidal 1. Thick substances need to squeeze the bottle body when pouring the container, and release the substance from the mouth of the bottle or the outlet of the bottle cap by means of pressurization in the bottle. However, for non-disposable bottled substances, it is easy for the substance remaining in the bottle mouth or cap to flow back into the bottle, or the external air will also enter the bottle more and more as the substance in the bottle is released. , making the contents of the bottle perishable. Therefore, it is a problem to...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a non-return bottle cap and its check valve to solve the problem that the content released from the bottle does not flow back into the bottle, prevent a large amount of air outside the bottle from entering the bottle, and ensure that the contents of the bottle can be discharged smoothly. Release, ensure that the contents of the bottle are not sprayed out of control when released, keep the cap and the mouth of the bottle clean, and avoid problems such as a large amount of residue on the cap after the contents of the bottle are released

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