Foam pump with breathing tablet

Abstract

A foam pump with a breathing piece is composed of a nozzle pressing head, a spiral cover and a pump body, wherein the pump body includes a pump body shell, a liquid inlet check valve, a large piston, a main valve stem, a valve needle, a rod bottom piston, a spring and a fixed clamp ring. It has a unique design of a breathing piece structure. Through the coordination of the breathing piece, the main valve stem and the large piston, the air intake is smoother, the pressure of the air intake cavity is greater, and a greater internal pressure can be generated, the gas and liquid are mixed evenly, and the foam is rich.

Description

Technical Field

[0001] The invention relates to a pump, in particular to a foam pump with a breathing piece. Background Art

[0002] Foam pumps, also called foaming pumps, are commonly used in container packaging of hand soap, dishwashing liquid, mousse, hairspray, etc. There is a liquid pump connected to the bottle mouth, and an air inlet chamber is provided near the liquid pump. After the high-pressure liquid and compressed air are mixed, they pass through a foaming net with a very dense mesh to produce a large amount of foam, which flows out from the nozzle of the pressing head.

[0003] For example, patent number CN201110128683.5 "A spring external foam pump" is arranged in the screw-type cover of the liquid container. When the spring external foam pump is used, the liquid container is filled with liquid. The user extracts the liquid in the liquid container quantitatively by pressing the spring external foam pump. In the process of completing the liquid extraction action, the extracted liquid is mixed with air by means of the spring external foam pump. The spring external foam pump includes a liquid extraction chamber, an air intake chamber and a liquid-gas mixing chamber. The liquid extraction chamber is used to accommodate the liquid to be extracted, and the air intake chamber is used to provide the air to be mixed. The liquid to be extracted and the air to be mixed provided by the air intake chamber are mixed in the liquid-gas mixing chamber and finally discharged from the outside of the spring external foam pump. The return spring is arranged in the air intake chamber.

[0004] Current foam pumps use piston-like valves when inhaling and compressing air, and provide compressed air in a manner similar to an air pump. When the large piston and the connecting cover fit together, the air intake valve is closed, and when they are separated, the air intake valve opens; when the pull rod valve plate and the connecting rod valve plate fit together, the air blowing valve is closed, and when they are separated, the air blowing valve opens. The air intake chamber requires the above-mentioned large piston, connecting cover, pull rod valve plate, and connecting rod valve plate structure, which is relatively complex. Moreover, when taking in air and blowing air, negative pressure will be generated on the air intake valve and the air blowing valve respectively. When the pressure in the air intake chamber increases, the air intake valve will also be pushed open, which will eventually lead to a decrease in the pressure in the air intake chamber. The air pressure generated by the air blowing valve is limited and cannot generate a higher closed internal pressure.

[0005] In addition, when the foam pump is reset, the foaming liquid in the mixing chamber may flow back into the air inlet chamber along the air inlet valve, leaving a portion of the foaming liquid in the air inlet chamber, reducing the effective gas exchange space of the air inlet chamber. It is also not conducive to the next operation of the air inlet chamber. Therefore, when the nozzle is pressed quickly and repeatedly, the foaming effect becomes worse and worse. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a foam pump with a breathing piece structure, which utilizes the breathing effect of the breathing piece to realize the ventilation operation of the air inlet chamber. The structure is simpler and easy to install. It can also increase the internal pressure of the air inlet chamber, generate a higher atmospheric pressure in the mixing chamber, and produce uniform foam, rich foam and better durability.

[0007] The technical solution adopted by the present invention to solve the above-mentioned problem is: a foam pump with a breathing piece, which is composed of a nozzle pressing head, a screw ring cover and a pump body, wherein the pump body includes a pump body shell, a liquid inlet check valve, a large piston, a main valve stem, a valve needle, a rod bottom piston, a spring, and a fixed clamping ring; an air inlet chamber is formed between the large piston and the pump body shell, a liquid inlet chamber is formed between the liquid inlet check valve and the valve needle, a high-pressure liquid chamber is formed between the main valve stem and the upper section of the large piston, a mixing chamber is arranged above the large piston, and a foaming net is arranged in the mixing chamber. The main valve stem is provided with an elastic bracket, the outer side of the elastic bracket is connected with a lifting ring, the lifting ring is in contact with the outer edge of the breathing plate, and the elastic bracket pushes the breathing plate against the bottom of the inner wall of the large piston; a plurality of petal-shaped bodies are provided on the inner side of the breathing plate, the breathing plate is provided on the elastic bracket, and a part of the breathing plate is clamped by the bracket of the main valve stem and the large piston; an exhalation valve hole is provided on the main valve stem bracket below the petal-shaped body, and the exhalation hole and the high-pressure air flow channel on the large piston are above the petal-shaped body; the high-pressure air flow channel and the high-pressure liquid chamber are both connected to the mixing chamber.

[0008] Furthermore, the breathing piece and the supporting ring matched therewith are circular or regular polygonal.

[0009] Furthermore, a positioning piece is provided on the main valve stem, and the positioning piece cooperates with the gap between the petal-shaped bodies on the inner side of the breathing piece to limit the rotation of the breathing piece.

[0010] Furthermore, the pump body shell is tightly connected to the spiral cover, and the spiral cover is slidably connected to the nozzle pressing head. The spiral cover limits the nozzle pressing and the movement direction of the large piston and the main valve stem, so that they can only move up and down along the central axis.

[0011] Furthermore, the rod bottom piston is arranged between the main valve stem and the valve needle, and is allowed to slide up and down between the main valve stem and the valve needle, and the rod bottom piston and the inner wall of the liquid inlet cavity slide and rub. When the main valve stem moves down, the rod bottom piston moves up relative to the valve needle, exposing the inner hole of the valve needle; when the main valve stem moves up, the rod bottom piston moves down relative to the valve needle, closing the inner hole of the valve needle.

[0012] Furthermore, the high-pressure air flow channel is formed by the gap between the inner wall of the large piston and the top of the main valve stem, and the exhalation hole of the main valve stem is communicated with the high-pressure air flow channel.

[0013] Furthermore, the liquid inlet cavity one-way valve is composed of a steel ball, a tapered hole and an anti-dropping bayonet.

[0014] Furthermore, an air pressure balance hole is provided on the upper portion of the pump body shell. When the large piston is located at the lowest position, the air pressure balance hole communicates the outside air with the air in the bottle.

[0015] Compared with the prior art, the present invention adopts a breathing plate structure to control the air intake cavity, and its advantages are: its pump body is provided with an elastic breathing plate, which is controlled by the inhalation and exhalation of the breathing plate, just like human breathing, and can complete the intake and exhaust of the air intake cavity with a good rhythm, with smooth inhalation and high exhalation pressure.

[0016] When the nozzle pressing head is reset by the spring, the flap inside the breathing piece is closed, and the residual liquid in the mixing chamber will not be sucked into the air inlet chamber.

[0017] Compared with the air intake cavity structure in the comparative document, the air intake method adopts the breathing plate type, and the breathing plate, main valve stem and large piston cooperate with each other, so the air intake is smoother, the pressure of the air intake cavity is greater, and a greater internal pressure can be generated, the gas and liquid are mixed evenly, and the foam is rich. When the air intake cavity inhales air, the petal is completely supported by the pressure difference between the atmosphere and the negative pressure in the air intake cavity, and there will be no air leakage; when the air intake cavity is discharged, the outer edge of the breathing plate and the lifting ring are pressed by the lower side of the large piston and the pressure difference between the high-pressure air in the air intake cavity and the outside world, and there will be no air leakage.

[0018] It avoids the prior art of sealing the high-pressure gas in the air intake chamber by friction between the piston and the inner wall of the pump body, and almost no leakage of the high-pressure gas in the air intake chamber occurs, so that the mixing chamber can generate a larger air pressure and a stronger air flow, and the foam is rich and uniform, and the foam state is maintained for a long time.

[0019] When the foam pump is reset, the petal-shaped body of the breathing piece can block the backflow of the foaming liquid and prevent the foaming liquid from entering the air inlet chamber. Therefore, the foaming effect is still very good when the foam pump is pressed quickly and multiple times. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the appearance picture.

[0021] Figure 2 It is a cross-sectional view of the present invention along the nozzle direction.

[0022] Figure 3 This is a state diagram of the present invention when it is reset.

[0023] Figure 4 This is a state diagram of the present invention when the nozzle pressing head is pressed down. (Compared to Figure 3 , the section is rotated 30 degrees around the central axis).

[0024] Figure 5 for Figure 3 Enlarged view of point A.

[0025] Figure 6 for Figure 4 Enlarged view of point B.

[0026] Figure 7 This is a top view of the breathing piece.

[0027] Figure 8 A three-dimensional view of the upper structure of the main valve stem.

[0028] Fig. 9 A three-dimensional view of the lower structure of the main valve stem.

[0029] Fig.10 for Figure 2 Enlarged view of point C.

[0030] Fig.11 for Figure 4 Enlarged view of point D.

[0031] Among them, 1 is the nozzle pressing head, 2 is the screw ring cover, 3 is the pump body, 4 is the mixing chamber, 5 is the main valve stem, 6 is the breathing piece, 7 is the large piston, 8 is the valve needle, 9 is the piston at the bottom of the rod, 10 is the sealing plug, 11 is the steel ball, 12 is the tapered hole, 13 is the anti-dropping bayonet, and 14 is the air pressure balance hole.

[0032] 51 is an elastic bracket, 52 is an exhalation valve hole, 53 is a positioning plate, 54 is a lifting ring, 61 is a petal-shaped body, 62 is an outer edge of a breathing plate, 71 is an inhalation hole, 72 is an exhalation hole, and 81 is an inner hole of a valve needle.

[0033] 101 is a liquid inlet chamber, 102 is an air inlet chamber, 103 is a mixing chamber, 104 is a high-pressure liquid chamber, and 105 is a high-pressure air flow channel. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0035] A foam pump with a breathing tablet, such as Figure 1 to Figure 2 As shown, it is composed of a nozzle pressing head, a spiral cover and a pump body, wherein the pump body includes a pump body shell, a liquid inlet check valve, a large piston, a main valve stem, a valve needle, a rod bottom piston, a spring, and a fixed clamp ring; an air inlet chamber is formed between the large piston and the pump body shell, a liquid inlet chamber is formed between the liquid inlet check valve and the valve needle, a high-pressure liquid chamber is formed between the main valve stem and the upper section of the large piston, a mixing chamber is arranged above the large piston, and a foaming net is arranged in the mixing chamber. An elastic bracket is arranged on the main valve stem, a lifting ring is connected to the outside of the elastic bracket, the lifting ring is in contact with the outer edge of the breathing piece, and the elastic bracket pushes the breathing piece against the bottom of the inner wall of the large piston; a plurality of petal-shaped bodies are arranged on the inner side of the breathing piece, the breathing piece is arranged on the elastic bracket, and a part of the breathing piece is clamped by the bracket of the main valve stem and the large piston; an exhalation valve hole is arranged on the main valve stem bracket below the petal-shaped body, and the exhalation hole and the high-pressure air flow channel on the large piston are above the petal-shaped body; the high-pressure air flow channel and the high-pressure liquid chamber are both connected to the mixing chamber.

[0036] The breathing piece and the supporting ring matched therewith are circular or regular polygonal, and the embodiment adopts a circular design.

[0037] The petal on the breathing piece needs to correspond to the position of the exhalation valve hole on the main valve stem. In order to prevent the breathing piece from rotating and avoid misalignment between the breathing piece and the exhalation valve hole, a positioning piece is provided on the main valve stem. The positioning piece fits the gap between the petal inside the breathing piece. When the breathing piece and the supporting ring that matches it adopt a regular polygon design, the positioning piece structure can be omitted, and other positioning grooves can be used to limit the rotation of the breathing piece.

[0038] The pump body shell is tightly connected with the spiral cover, and the spiral cover is slidably connected with the nozzle pressing head. The spiral cover limits the nozzle pressing and the moving direction of the large piston and the main valve stem, so that they can only move up and down along the central axis.

[0039] The rod bottom piston is set between the main valve stem and the valve needle, and is allowed to slide up and down between the main valve stem and the valve needle, and the rod bottom piston and the inner wall of the liquid inlet chamber slide and rub. When the main valve stem moves down, the rod bottom piston moves up relative to the valve needle, exposing the inner hole of the valve needle; when the main valve stem moves up, the rod bottom piston moves down relative to the valve needle, closing the inner hole of the valve needle.

[0040] The gap between the inner wall of the large piston and the top of the main valve stem forms a high-pressure air flow channel, and the blowing hole of the main valve stem is communicated with the high-pressure air flow channel.

[0041] The one-way valve of the liquid inlet cavity is composed of a steel ball, a tapered hole and an anti-dropping bayonet, and the anti-dropping bayonet prevents the steel ball from dropping out of the tapered hole.

[0042] An air pressure balance hole is arranged on the upper part of the pump body shell, and the outside air communicates with the bottle through the air pressure balance hole.

[0043] High-density foaming nets are set at both ends of the mixing chamber. Under the push of high-pressure airflow, a large amount of foam can be generated and enter the nozzle pressing head.

[0044] When the nozzle pressing head is pressed down, the lower end of the nozzle pressing head presses the large piston, and the large piston drives the main valve stem to move downward synchronously. At this time, the outer side of the breathing piece is lifted and fixed on the inner wall of the large piston, and moves downward synchronously; and above the inner petal is the exhalation hole. After the air pressure increases, the petal on the inner side of the breathing piece is pushed by the high-pressure gas in the air inlet chamber, and the petal undergoes elastic deformation to form an exhalation channel. The high-pressure air in the air inlet chamber goes along the exhalation valve hole on the main valve stem, through the exhalation channel and the high-pressure air flow channel, and enters the gas-liquid mixing chamber. This is called the exhalation process; as the main valve stem moves downward, the piston at the bottom of the rod retreats upward due to the friction with the liquid inlet chamber, giving way to the liquid inlet channel of the valve needle, and the liquid in the liquid inlet chamber also enters the mixing chamber.

[0045] The foaming liquid and high-pressure air are mixed in the mixing chamber, and a large amount of foam is generated after passing through the high-density mesh holes on the upper and lower sides of the mixing chamber, and is sprayed out along the internal channel of the nozzle pressing head.

[0046] When the large piston reaches its maximum downward stroke, the piston wall of the large piston drops, the air pressure balance hole on the pump body shell opens, and the gas in the bottle communicates with the atmosphere to achieve ventilation.

[0047] When the nozzle pressing head is released, the main valve stem drives the large piston to return upward under the upward thrust of the spring. At this time, the petal-shaped body on the inner side of the breathing piece is held up by the main valve stem. At the same time, due to the negative pressure in the air intake chamber and the pressure difference with the outside air, the exhalation valve hole is covered by the petal-shaped body, and the exhalation channel is completely closed. Due to the negative pressure in the air intake chamber, the pressure difference between the outside air pressure and the air intake chamber presses the outer edge of the breathing piece, driving the lifting ring to deform downward, and the elastic bracket to deform. An inhalation channel is formed between the outer edge of the exhalation piece and the large piston, and the air intake chamber is filled with air. This process is called the inhalation process.

[0048] During the inhalation process, the valve needle moves upward with the main valve stem, and the piston at the bottom of the stem cuts off the inner channel of the valve needle. The space in the liquid inlet chamber increases and generates negative pressure. The foaming liquid in the bottle flows along the straw, pushes away the steel ball, and enters the liquid inlet chamber along the one-way valve for storage.

[0049] During the inhalation process, the main valve stem moves upward, pushing the petal-shaped body on the inner side of the breathing piece to close the exhalation hole, which can effectively prevent the foaming liquid from being sucked into the air inlet cavity.

[0050] When the suction is finished, the large piston returns to its original position, blocking the air pressure balance hole to prevent the foaming liquid in the bottle from leaking.

Claims

1. A foam pump with a breathing piece, composed of a nozzle pressing head, a spiral cover and a pump body, wherein the pump body includes a pump body shell, a liquid inlet check valve, a large piston, a main valve stem, a valve needle, a rod bottom piston, a spring, and a fixed clamp ring; an air inlet chamber is formed between the large piston and the pump body shell, a liquid inlet chamber is formed between the liquid inlet check valve and the valve needle, a high-pressure liquid chamber is formed between the main valve stem and the upper section of the large piston, a mixing chamber is provided above the large piston, and a foaming net is provided in the mixing chamber, characterized in that: The main valve stem is provided with an elastic bracket, the outer side of the elastic bracket is connected with a lifting ring, the lifting ring is in contact with the outer edge of the breathing piece, and the elastic bracket pushes the breathing piece against the bottom of the inner wall of the large piston; A plurality of petal-shaped bodies are arranged on the inner side of the breathing piece, the breathing piece is arranged on an elastic bracket, and a part of the breathing piece is clamped by the bracket of the main valve stem and the large piston; an exhalation valve hole is arranged on the main valve stem bracket below the petal-shaped body, and the exhalation hole and the high-pressure air flow channel on the large piston are above the petal-shaped body; the high-pressure air flow channel and the high-pressure liquid chamber are both connected with the mixing chamber; the breathing piece and the supporting ring matched with it are circular or regular polygonal; a positioning piece is arranged on the main valve stem, and the positioning piece cooperates with the gap between the petal-shaped bodies on the inner side of the breathing piece to limit the rotation of the breathing piece.

2. The foam pump with a breathing piece according to claim 1, characterized in that: The pump body shell is tightly connected with the spiral cover, and the spiral cover is slidably connected with the nozzle pressing head. The spiral cover limits the nozzle pressing and the moving direction of the large piston and the main valve stem, so that they can only move up and down along the central axis.

3. The foam pump with a breathing piece according to claim 1, characterized in that: The rod bottom piston is arranged between the main valve stem and the valve needle, and is allowed to slide up and down between the main valve stem and the valve needle, and the rod bottom piston slides and rubs against the inner wall of the liquid inlet chamber; when the main valve stem moves downward, the rod bottom piston moves upward to expose the inner hole of the valve needle; when the main valve stem moves upward, the rod bottom piston closes the inner hole of the valve needle.

4. The foam pump with a breathing piece according to claim 1, characterized in that: The high-pressure air flow channel is formed by the gap between the inner wall of the large piston and the top of the main valve stem, and the exhalation hole of the main valve stem is communicated with the high-pressure air flow channel.

5. The foam pump with a breathing piece according to claim 1, characterized in that: The liquid inlet one-way valve is composed of a steel ball, a tapered hole and an anti-dropping bayonet.

6. The foam pump with a breathing piece according to claim 1, characterized in that: An air pressure balance hole is arranged on the upper part of the pump body shell. When the large piston is located at the lowest position, the air pressure balance hole communicates the outside air with the air in the bottle.

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