1. Field of the Invention
The present invention is related to a cap with a suction type spray head and particularly to a cap with a suction type spray head, which is attached to a container of a specific liquid and the liquid can be sucked out by way of air pressure difference and atomized with sprayed air.
2. Brief Description of the Related Art
The traditional cap with spray head of a container for filling with perfume or drug provides a plug ring with a hole being associated with a clearance between the cap and the lateral edge of the mouth of the container being as an intake passage of the compressed air. However, the clearance is hard to be controlled the size thereof so that the liquid is difficult to spray out if the clearance is too small and it is easy to result in leakage of the liquid if the clearance is a little larger. Taiwanese Patent Official Gazette No. 228078 discloses an improved structure of perfume bottle cap with spray head shown in
Although the preceding technique can overcome the control problem of the clearance, the liquid has to enter the vacuumed air bag via the sucking tube before being sprayed outward from the nozzle by way of compressing the air bag every time the liquid being sprayed. Hence, the effect of continuously spraying the liquid cannot be obtained.
The present invention provides a cap with suction type spray head, which includes an air guiding chamber, an intake passage, an outgoing passage, a liquid sucking mouth and an air pressure balancing aperture for a container with a sprayer. The air pressure balancing aperture communicates with the open air to allow the air pressure at interior of the container being inconsistent with that at the exterior of the container and the outgoing passage connects with the air guiding chamber at one end thereof and extends outward at another end thereof with a spraying outlet. The air guiding chamber has a discharge port at the periphery of the cap and the liquid sucking mouth is connected to a sucking tube with the other end of the sucking tube being immerged the liquid in the container. Further, the liquid sucking mouth oppositely faces the spraying outlet of the outgoing passage.
The cap with suction type spray head according to the present invention provides a simple structure with easy operation so that the cap can be attached to the container filled with liquid and the intake passage of the cap is connected to a hose, which is joined to a low pressure air compressor as an intake air source. In case of being in operation, the discharge port of the air guiding chamber is blocked by the user to allow the introduced outside air passing through the outgoing passage and spraying out via the spraying outlet. Due to the sprayed air having a fast flow speed with a pressure lower than the static atmosphere pressure and the pressure in the container is inconsistent with static atmosphere pressure, it is learned from Bernoulli's law of fluid mechanics that the liquid in the container can be sucked out from the sucking mouth via the sucking tube because of pressure difference between sprayed air and the liquid. Further, the fluid sucked out of sucking mouth faces the sprayed air from the spraying outlet such that the fluid can be ejected in a state of atomization. In case of not being used, the discharge port is unblocked and keeps in a state of opening such that the introduced outside air is discharged via the discharge port directly instead of passing through the outgoing passage and spraying out from the spraying outlet. In this way, the air pressure at the sucking mouth keeps the static atmosphere pressure instead of being less than the static atmosphere pressure such that no pressure difference is created between the sucking mouth and the interior of the container and the liquid in the container does not flow out.
The cap with a suction type spray head according to the present invention provides no movable parts and no air control valves joining the hose connected to the spray head so that it is not so complicated as the prior art in structure. Hence, the cap with a suction type spray head according to the present invention can made with injection molding as an integral piece to facilitate the operation and lower production cost. Furthermore, the cap with a suction type spray head according to the present invention can be made as a disposable cap such that the cap can be renewed after using instead of cleaning the cap frequently to enhance sanitation.
The cap with suction type spray head according to the present invention has the following features:
1. No movable parts and no air control valve parts joining the hose connected to the spray head are necessary in the cap with suction type spray head according to the present invention while the air is introduced to cap with the spray head. In case of being in operation, the discharge port of the air guiding chamber is blocked by the user to allow the introduced outside air passing through the outgoing passage and spraying out via the spraying outlet and the liquid in the container can be sucked out in a state of atomization. In case of not being used, the discharge port is kept in a state of opening to allow the introduced outside air being discharged via the discharge port directly.
2. The cap with a suction type spray head according to the present invention is used for a specific liquid so that parts for regulating the spray head are not required.
3. The cap with a suction type spray head according to the present invention is attached to the mouth of a container as a cap of the container so that no further cap is required.
4. The cap with a suction type spray head according to the present invention provides no movable parts so that the cap of the present invention can be made with injection molding as an integral cap to lower the production cost greatly and enhance the effect thereof substantially.
5. The cap with a suction type spray head according to the present invention can be made as a disposable cap for being renewed after using once instead of cleaning the cap frequently to enhance sanitation.
6. The cap with a suction type spray head according to the present invention provides a simple structure with easy operation so that it is not necessary for the user to be trained before using.
The detail structure, the applied principle, the function and the effectiveness of the present invention can be more fully understood with reference to the following description and accompanying drawings, in which:
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While the invention has been described with referencing to preferred embodiments thereof, it is to be understood that modifications or variations may be easily made without departing from the spirit of this invention, which is defined by the appended claims.
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Number | Date | Country |
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228078 | Aug 1994 | TW |
Number | Date | Country | |
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20060054644 A1 | Mar 2006 | US |