Waterproofing mechanism for emulsion pump

Abstract

The invention provides a water-induction prevention device of an emulsion pump, mainly used to be mounted in the emulsion pump of a liquid container to furthest prevent outside liquid entering the container. According to one aspect of the invention, at least one cut (15) disposed on a locking tube (13) of a pressure head (10), starting from the lower end edge of the locking tube and extending along partial length of the locking tube (13). The upper end of the cut is disposed higher than the upper plane (25) of a cylinder head (20) when the pressure head is positioned at a pressure stroke lower stop point corresponding to the cylinder head. According to another aspect of the invention, the external thread (14) on the locking tube extends upwards spirally from the lower end edge of the locking tube, and the internal thread (26) on the central through hole (21) of the cylinder head downwards spirally from the upper end edge of the central through hole. The structure according to the two aspects both can effectively prevent outside liquid inducing into the container during operation.

Description

technical field [0001] The invention relates to the field of lotion pumps, and more specifically relates to a water ingress prevention mechanism of a lotion pump. Background technique [0002] The lotion pump is generally installed at the opening of the container, and is used for pumping the liquid in the container, such as lotion, out of the container for use through a manual pressing operation by a user. At present, there are various anti-water mechanisms for lotion pumps on the market, which are used to prevent external liquids such as water from entering the container through the pump during the operation of the lotion pump and contaminating the products contained in the container. However, these traditional water ingress prevention mechanisms have the problem that it is difficult to prevent external liquid from entering the container. [0003] For example, Chinese patent announcement CN2314128Y proposes a water-ingress-proof mechanism for a lotion pump. As shown in FI...

AI Technical Summary

Problems solved by technology

But when the pressure head 110 is pressed down to the annular recess 124 of the cylinder head 120 at the lower end of its locking pipe 113, if there is sewage or other liquids accumulated in the annular recess 124 It is unavoidable), then the lower end of the locking tube 113 will be immersed in the accumulated liquid to block the communication between the interior of the container and the outside atmosphere. In this way, the continued downward pressure of the pressure head 110 will cause the accumulated liquid to be sucked into the container, resulting in of liquid products are contaminated

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