CN117772448A - Foam pump capable of discharging evenly - Google Patents

Abstract

The invention discloses a uniform discharging foam pump, which comprises a lock bottle cap, wherein a pump body is arranged on the lock bottle cap, the lower end of the pump body is connected with a suction pipe through a liquid inlet, a liquid storage cavity which is communicated with the suction pipe and can be used for allowing liquid to flow in, a gas storage cavity which is communicated with the outside air of the lock bottle cap and a pumping assembly which can slide up and down relative to the pump body are arranged in the pump body, the pumping assembly comprises a liquid extrusion device capable of pumping liquid and an air extrusion device capable of pumping air, a one-way valve capable of controlling the liquid inlet to open is arranged in the liquid storage cavity, a pressing head capable of driving the liquid extrusion device and the air extrusion device to downwards is arranged on the pumping assembly, a plastic spring which is used for pressing the pressing head to drive the pumping assembly to reset is arranged between the lock bottle cap and the pressing head, a mixing channel which is used for converging the liquid flowing out of the liquid storage cavity and the gas flowing out of the gas storage cavity into mixed fluid is arranged in the pumping assembly, a net through which can form foam is arranged in the pressing head, and a uniform structure which is used for leading the mixed fluid to flow after being split is arranged in the net through.

Description

Foam pump capable of discharging evenly

[ field of technology ]

The invention relates to a foam pump capable of discharging uniform materials.

[ background Art ]

With the improvement of living standard, people are pursuing convenience in use of daily necessities, such as spraying foam from some bottled liquid through a foam pump during use, so that the liquid is not required to be rubbed into foam by hands.

Some foam pump structures on the market at present, as disclosed in chinese patent with publication No. CN219729058U, generally include the body, the valve block, the straw, the gasket, press head subassembly and play foam subassembly, press head subassembly includes the gland, the spring, safety card and screw cap, the spring is installed between gland and screw cap, the bottom of gland still links to each other with play foam subassembly, play foam subassembly includes the net, the valve, pull rod and piston, the outer wall at valve top and the bottom block of gland, the bottom of valve cooperates with the top of piston, the bottom of piston cooperates with the inner wall of body, the pull rod is still installed to the inside of valve and piston, the net is installed on the valve, the net is the tubular structure in, establish double-deck foaming net in the pressure state, the gland drives the spring, the valve, pull rod and piston move down, liquid in the bottle gets into the liquid storehouse of body through the straw, then get into inside the pull rod, come out by the head of pull rod at last, piston and valve are the separation state simultaneously, gas is in the gas-liquid mixing chamber in entering into the valve through first draw-in groove and second draw-in groove, make gas and liquid mix the liquid and foam pump after the liquid passes through the net foaming pipe and foam pump. Although the foam pump can achieve a certain foaming effect, in the use process, the gas and the liquid are mixed and not uniformly before entering the net through net, so that the mixed foaming effect of the gas and the liquid is poor.

The present invention has been made in view of the above drawbacks.

[ invention ]

The invention aims to overcome the defects of the prior art and provide the uniform discharging foam pump with simple structure and good foaming effect.

The invention is realized by the following technical scheme:

a homogeneous foam pump of ejection of compact, its characterized in that: including can fix the lock bottle lid 1 on the liquid holding bottle, lock bottle lid 1 on install the pump body 2, pump body 2 lower extreme be connected with straw 3 through inlet 21, pump body 2 in be equipped with the liquid storage chamber 22 that feeds into with straw 3 intercommunication and can supply liquid to flow into, can with the air storage chamber 23 of lock bottle lid 1 outside air intercommunication, can relative pump body 2 gliding pumping assembly from top to bottom, pumping assembly including can pump liquid extrusion device 4 and can pump air extrusion device 5 of air, liquid storage chamber 22 in be equipped with and control inlet 21 and open the check valve 6 that makes liquid flow into liquid storage chamber 22 from the bottle, pumping assembly upper end be equipped with and can drive liquid extrusion device 4 and air extrusion device 5 and move down press the head 7, liquid extrusion device 4 move down and make the liquid flow direction press head 7 of liquid storage chamber 22 in the air extrusion chamber 23, air extrusion device 5 move down and make the air current of air storage chamber 23 press head 7, lock bottle lid 1 between be equipped with can control the liquid inflow from the bottle and flow into the liquid storage chamber 9 when the liquid mixture net is formed to the pressure and mix the end 9 through the pressure that can be equipped with in the pressure head 9 when mixing net and mix the liquid flow channel 9 is formed to the pressure that mix the liquid flow channel 9 is passed through to the pressure in the pressure storage chamber 9, mix the end is equipped with and mix the liquid flow channel 9 when the pressure flow channel is formed.

The uniform foam pump of ejection of compact as described above, its characterized in that: the uniform structure 91 includes a plurality of drainage channels 911 which are circumferentially arranged at intervals along the net passage 9 on the inlet end of the net passage 9 and are communicated with the mixing channel 10 for the mixed fluid to flow in, and a confluence cavity 912 which is communicated with each drainage channel 911 and can cross and scatter the mixed fluid flowing into each drainage channel 911, and a foaming net 92 for the mixed fluid after cross and scatter to pass is arranged on the outlet end of the net passage 9.

The uniform foam pump of ejection of compact as described above, its characterized in that: the inlet end of the net through 9 is provided with a convex ring 93 extending along the axial direction of the net through 9, the inner side of the convex ring 93 is provided with a plurality of convex blocks 931 extending towards the center of the convex ring 93, the convex blocks 931 enclose the confluence cavity 912, and the drainage channels 911 are arranged on the convex ring 93 at intervals.

The uniform foam pump of ejection of compact as described above, its characterized in that: the air extrusion device 5 comprises an air compressing piston 51 which is arranged in the air storage cavity 23 in a relative sliding manner and one end of which penetrates out of the lock bottle cap 1 and is connected with the pressing head 7, an air inlet channel 20 for air outside the lock bottle cap 1 to enter is formed between the outer wall of the air compressing piston 51 and the inner wall of the lock bottle cap 1, and an air valve 52 which can control the air storage cavity 23 to be communicated with the mixing channel 10 when the pressing head 7 drives the air compressing piston 51 to press the air in the air storage cavity 23 downwards or can control the air storage cavity 23 to be communicated with the air inlet channel 20 when the spring 8 springs the pressing head 7 to drive the air compressing piston 51 to move upwards to reset so as to generate negative pressure in the air storage cavity 23.

The uniform foam pump of ejection of compact as described above, its characterized in that: the liquid extrusion device 4 comprises a liquid guide tube 41, the upper end of which is connected with a pneumatic piston 51, the lower end of which extends into the liquid storage cavity 22, a communication port 411 which is used for communicating the mixing channel 10 with the liquid storage cavity 22 and a piston rod 42 which is driven by the pressing head 7 to move up and down are arranged in the liquid guide tube 41, the piston rod 42 opens the communication port 411 when being driven by the pressing head 7 to move down and extrudes liquid in the liquid storage cavity 22 to flow from the communication port 411 to the mixing channel 10, and the piston rod 42 seals the communication port 411 when being driven by the pressing head 7 to move up.

The uniform foam pump of ejection of compact as described above, its characterized in that: the lower end of the pressing head 7 is provided with a plug pipe 71 communicated with the liquid outlet end of the pressing head 7, the net through 9 is arranged in the plug pipe 71, the plug pipe 71 is connected with the upper end of the air compressing piston 51 through a connecting pipe fitting 30, the upper end of the piston rod 42 is arranged on the connecting pipe fitting 30 in a penetrating manner, and the connecting pipe fitting 30 is provided with a plurality of liquid outlet small holes 301 communicated with the mixing channel 10 and the drainage channel 911.

The uniform foam pump of ejection of compact as described above, its characterized in that: the upper end of the connecting pipe fitting 30 is inserted into the insertion pipe 71, the inlet end of the net through 9 is inserted into the upper end of the connecting pipe fitting 30, the upper end of the piston rod 42 is inserted into the lower end of the connecting pipe fitting 30, a partition plate 302 for vertically separating the inner cavity of the connecting pipe fitting 30 is arranged in the connecting pipe fitting 30, the upper end of the piston rod 42 is arranged on the partition plate 302 in a penetrating manner, and the liquid outlet small hole 301 is arranged on the partition plate 302.

The uniform foam pump of ejection of compact as described above, its characterized in that: the air valve 52 is provided with a first sealing elastic sheet 521 which is abutted against the lower end of the air inlet channel 20 and the air storage cavity 23, the lower end of the air valve 51 is provided with a mounting groove 512 for the upper end of the liquid guide tube 41 to be inserted and mounted, an air outlet channel 40 which is communicated with the air storage cavity 23 and the mixing channel 10 is arranged between the inner wall of the mounting groove 512 and the outer wall of the liquid guide tube 41, and the air valve 52 is provided with a second sealing elastic sheet 522 which is abutted against the liquid guide tube 41 to seal the air outlet channel 40.

The uniform foam pump of ejection of compact as described above, its characterized in that: the plastic spring 8 comprises a plurality of elastic units connected from top to bottom.

The uniform foam pump of ejection of compact as described above, its characterized in that: the elastic unit comprises two oppositely arranged X-shaped elastic arms 81, the end parts of the two X-shaped elastic arms 81 are connected in one-to-one correspondence and are surrounded to form a vertical through hole 82, and the X-shaped elastic arms 81 of the plastic spring 8 positioned at the top and the bottom are respectively connected with a supporting connecting sheet 83.

Compared with the prior art, the invention has the following advantages:

1. when flowing into the net, the mixed fluid can pass through a uniform structure formed by the confluence cavity and a plurality of drainage channels, and when the mixed fluid in each drainage channel is converged to the confluence cavity, the mixed fluid collides with each other and breaks up, and is uniformly mixed, so that the foam formed by the net is more uniform and rich, and the use effect is good.

2. The plastic spring with good rebound resilience performance replaces the metal spring, other components are made of plastic, and the plastic spring can be directly recycled and remolded without disassembling and taking out the spring when the foam pump is recycled, so that the production efficiency is high, energy is saved, and the environment is protected.

[ description of the drawings ]

FIG. 1 is a schematic view of the structure of the present invention in an initial state;

FIG. 2 is a schematic view of the structure of the present invention when the pressing head is pressed;

FIG. 3 is an exploded view of the present invention;

FIG. 4 is a perspective view of the net pass of the present invention;

FIG. 5 is a perspective view of a connecting tube of the present invention;

FIG. 6 is a perspective view of a displacer of the present invention;

fig. 7 is a perspective view of the plastic spring of the present invention.

[ detailed description ] of the invention

The invention is further described below with reference to the accompanying drawings:

as shown in fig. 1 to 7, a uniform foam pump for discharging comprises a lock bottle cap 1 capable of being fixed on a liquid containing bottle, a pump body 2 is installed on the lock bottle cap 1, the lower end of the pump body 2 is connected with a suction pipe 3 through a liquid inlet 21, a liquid storage cavity 22 communicated with the suction pipe 3 and capable of allowing liquid to flow in, a gas storage cavity 23 communicated with the air outside the lock bottle cap 1 and a pumping assembly capable of sliding up and down relative to the pump body 2 are arranged in the pump body 2, the pumping assembly comprises a liquid extrusion device 4 capable of pumping liquid and an air extrusion device 5 capable of pumping air, a one-way valve 6 capable of controlling the liquid inlet 21 to open so that the liquid flows into the liquid storage cavity 22 from the bottle body, a pressing head 7 capable of driving the liquid extrusion device 4 and the air extrusion device 5 to move downwards is arranged at the upper end of the pumping assembly, the liquid extrusion device 4 moves downwards so that the liquid in the liquid storage cavity 22 flows towards the pressing head 7, the air extrusion device 5 moves downwards so that the air in the gas storage cavity 23 generates air flow towards the pressing head 7, a liquid storage cavity 1 is arranged between the lock bottle cap 1 and the pressing head 7, a liquid storage cavity 9 is driven by the pressing head 7 to move upwards, and a mixed fluid is formed by a mixed fluid 9, and the mixed fluid is discharged from the mixed fluid 9 through a mixed fluid channel 9 after the mixed fluid is formed by driving the liquid flow channel 9, and the mixed fluid is formed by driving the reset fluid flow channel 9, and the mixed fluid flow channel is formed by the liquid injection device. When the pressing head 7 is pressed down, the liquid extrusion device 4 moves downwards to enable the liquid in the liquid storage cavity 22 to generate air pressure to extrude the liquid in the liquid storage cavity 22 to flow to the pressing head 7, the air extrusion device 5 also moves downwards to enable the air flow in the air storage cavity 23 to generate air pressure to extrude the air storage cavity 23 to flow to the pressing head 7, then the liquid and the air are sprayed into the mixing channel 10, then the mixed fluid is uniformly dispersed after passing through the uniform structure of the net through 9 from the mixing channel 10, and finally foam formed by the net through 9 is sprayed out of the pressing head 7.

As shown in fig. 4, the uniform structure 91 includes a plurality of drainage channels 911 which are circumferentially arranged at intervals along the screen 9 on the inlet end of the screen 9 and are communicated with the mixing channel 10 for the mixed fluid to flow in, and a confluence chamber 912 which is communicated with each drainage channel 911 and can break up the mixed fluid flowing into each drainage channel 911, and a foaming screen 92 for the mixed fluid after break up to pass through is arranged on the outlet end of the screen 9. When the mixed fluid flows into the net through 9, the mixed fluid passes through a uniform structure 91 formed by the confluence cavity 912 and the drainage channels 911, and when the mixed fluid in each drainage channel 911 of the sub-channels of the mixed channel 10 is converged into the confluence cavity 912, the mixed fluid collides with each other and breaks up, and is uniformly mixed, so that the foam formed by the foaming net of the net through 9 is more uniform and rich, and the use effect is good.

Specifically, a convex ring 93 extending along the axial direction of the net through 9 is arranged at the inlet end of the net through 9, a plurality of convex blocks 931 extending towards the center of the convex ring 93 are arranged at the inner side of the convex ring 93, the plurality of convex blocks 931 enclose the confluence cavity 912, and the drainage channels 911 are arranged on the convex ring 93 at intervals. In this embodiment, the converging cavity 912 is located at the center of the convex ring 93, four drainage channels 911 are uniformly formed in the circumference of the convex ring 93, four protrusions 931 are also provided between adjacent drainage channels 911, and the mixed fluid sprayed from the four drainage channels 911 is collided and dispersed in the converging cavity 912 under the guidance of the protrusions 931 to be uniformly mixed.

As shown in fig. 1, the air extrusion device 5 includes an air compressing piston 51 which is slidably disposed in the air storage cavity 23 and one end of which passes through the lock bottle cap 1 and is connected with the pressing head 7, an air inlet channel 20 for air entering the lock bottle cap 1 is formed between the outer wall of the air compressing piston 51 and the inner wall of the lock bottle cap 1, and an air valve 52 which can control the air storage cavity 23 to be communicated with the mixing channel 10 when the pressing head 7 drives the air compressing piston 51 to press the air in the air storage cavity 23 downwards or can control the air storage cavity 23 to be communicated with the air inlet channel 20 when the spring 8 springs the pressing head 7 to drive the air compressing piston 51 to move upwards to reset so as to generate negative pressure in the air storage cavity 23.

The liquid extrusion device 4 comprises a liquid guide tube 41, the upper end of which is connected with a pneumatic piston 51, the lower end of which extends into the liquid storage cavity 22, a communication port 411 which is used for communicating the mixing channel 10 with the liquid storage cavity 22 and a piston rod 42 which is driven by the pressing head 7 to move up and down are arranged in the liquid guide tube 41, the piston rod 42 opens the communication port 411 when being driven by the pressing head 7 to move down and extrudes liquid in the liquid storage cavity 22 to flow from the communication port 411 to the mixing channel 10, and the piston rod 42 seals the communication port 411 when being driven by the pressing head 7 to move up. Specifically, the inner wall of the catheter 41 is formed with a conical ring, the communication port 411 is surrounded by the conical ring, and a boss capable of abutting against the conical ring to seal the communication port 411 is arranged at the lower end of the piston rod 42. When the pressing head 7 is pressed down, the piston rod 42 is driven to move downwards relative to the liquid guide tube 41, so that a circulation gap is formed between the boss and the conical ring, and liquid in the liquid storage cavity 22 can flow to the mixing channel 10 along the liquid guide tube 41 after passing through the circulation gap and the communication port. It should be noted that, when the communication port 411 is opened, the pressing head 7 is further pressed down, and the piston rod 42, the displacer 51, the catheter 41 and the air valve 52 move downward together, because the pressing head 7 will first push the upper end of the piston rod 42, so that the displacer 51 will be pushed after the piston rod 42 moves downward by a certain distance.

The lower end of the pressing head 7 is provided with a plug pipe 71 communicated with the liquid outlet end of the pressing head 7, the net through 9 is arranged in the plug pipe 71, the plug pipe 71 is connected with the upper end of the air compressing piston 51 through a connecting pipe fitting 30, the upper end of the piston rod 42 is arranged on the connecting pipe fitting 30 in a penetrating way, and the pressing head 7 drives the piston rod 42 and the air compressing piston 51 through the connecting pipe fitting 30 respectively. The connecting pipe fitting 30 is provided with a plurality of liquid outlet small holes 301 which are communicated with the mixing channel 10 and the drainage channel 911, and the mixed fluid flows through the liquid outlet small holes 301 to be pressurized and sprayed to the drainage channel 911.

Specifically, the upper end of the connecting pipe fitting 30 is inserted into the insertion pipe 71, the inlet end of the net through 9 is inserted into the upper end of the connecting pipe fitting 30, the upper end of the piston rod 42 is inserted into the lower end of the connecting pipe fitting 30, a partition plate 302 for separating the inner cavity of the connecting pipe fitting 30 from the upper and lower parts is arranged in the connecting pipe fitting 30, the upper end of the piston rod 42 is arranged on the partition plate 302 in a penetrating manner, and the liquid outlet small hole 301 is arranged on the partition plate 302.

In the invention, an air inlet 511 which is communicated with an air inlet channel 20 and an air storage cavity 23 is arranged on an air compressing piston 51, a first sealing elastic sheet 521 which is abutted against the lower end of the air inlet 511 for sealing is arranged on an air valve 52, a mounting groove 512 for inserting and mounting the upper end of a liquid guide tube 41 is arranged at the lower end of the air compressing piston 51, an air outlet channel 40 which is communicated with the air storage cavity 23 and a mixing channel 10 is arranged between the inner wall of the mounting groove 512 and the outer wall of the liquid guide tube 41, and a second sealing elastic sheet 522 which is abutted against the liquid guide tube 41 for sealing the air outlet channel 40 is arranged on the air valve 52. Specifically, the inner wall of the installation groove 512 is provided with a supporting block 513 for separating the inner wall of the installation groove 512 from the outer wall of the liquid guide tube 41 to form the air outlet channel 40, and the upper end surface of the liquid guide tube 41 is not contacted with the bottom wall of the installation groove 512, so that a gap is left, and air in the air outlet channel 40 can enter the mixing channel 10 at the upper end of the displacer 51 from the gap.

The spring 8 is a plastic spring made of plastic materials, the plastic spring with good rebound resilience performance replaces a metal spring, other components are made of plastic, and the plastic spring can be directly recycled and remolded without disassembling and taking out the spring when the foam pump is recycled, so that the production efficiency is high, energy is saved, and the environment is protected. Specifically, the spring 8 comprises a plurality of elastic units connected from top to bottom, the structure is simple, the elastic units are easy to integrally form and manufacture, the effective stroke of the plastic spring is long, the range is wide, and springs with different elasticity can be produced according to the requirements and applied to different foam pumps.

Specifically, the elastic unit includes two opposite X type spring arms 81, and two X type spring arms 81 tip one-to-one is connected and encloses into and has vertical through-hole 82, and the X type spring arm 81 that plastic spring 8 is located top and bottom is connected with support connection piece 83 respectively. When the plastic spring is arranged on the foam pump, the plastic spring is sleeved on the plug tube 71 through the vertical through hole 82, and the support connecting sheets 83 at the two ends of the plastic spring respectively prop against the pressing head and the bottle locking cover.

When the foam pump is used, the pressing head 7 is pressed down, the piston rod 42 and the air compressing piston 51 are respectively pressed down by the pressing head 7 through the connecting pipe fitting 30, the air compressing piston 51 drives the liquid guide tube 41 and the air valve 52 to move downwards together, air in the air storage cavity 23 is pumped out through the air compressing piston 51, namely, the air in the airtight space between the air storage cavity 23 and the air compressing piston 51 is compressed, and the air washes out the second sealing elastic sheet 522 to flow out; after the piston rod 42 moves downwards for a certain distance, the communication port 411 is opened, the piston rod 42 moves downwards again to pump out the solution in the liquid storage cavity 22 through the liquid guide tube 41, the pumped air and the pumped liquid are converged in the mixing channel 10, enter the net through 9 through the drainage channel 911 and the converging cavity 912, and are sprayed outwards from the pressing head after foam is formed. After the external force acting on the pressing head 7 is released, under the action of a plastic spring, the pressing head 7, the air compressing piston 51, the piston rod 42, the liquid guide tube 41 and the air valve 52 are lifted upwards, wherein a negative pressure is formed in a closed space between the air compressing piston 51 and the air storage cavity 23, the second sealing elastic piece 522 is abutted against the liquid guide tube 41 again to enable the air outlet channel 40 to be closed, the first sealing elastic piece 521 is flushed by air entering from the air inlet channel 20, and the air is supplemented into the air storage cavity 23 from the air inlet hole 511; after the piston rod 42 moves up a certain distance, the communication port 411 is closed, and the liquid suction plug 4 is driven to move upwards, so that negative pressure is formed in the liquid storage cavity 22, and the solution in the bottle is flushed out of the one-way valve plate and flows into the liquid storage cavity 22 under the action of atmospheric pressure.

Claims (10)

1. A homogeneous foam pump of ejection of compact, its characterized in that: the liquid bottle comprises a bottle locking cover (1) which can be fixed on a liquid bottle, the bottle locking cover (1) is provided with a pump body (2), the lower end of the pump body (2) is connected with a suction pipe (3) through a liquid inlet (21), a liquid storage cavity (22) which is communicated with the suction pipe (3) and can be used for allowing liquid to flow in, a gas storage cavity (23) which can be communicated with the outside air of the bottle locking cover (1) and a pumping assembly which can slide up and down relative to the pump body (2), the pumping assembly comprises a liquid extrusion device (4) capable of pumping liquid and an air extrusion device (5) capable of pumping air, a one-way valve (6) which can control the liquid inlet (21) to be opened so that the liquid flows into the liquid storage cavity (22) from the bottle body is arranged at the lower end of the pump body, a pressing head (7) which can drive the liquid extrusion device (4) and the air extrusion device (5) to move downwards is arranged at the upper end of the pump assembly, the liquid extrusion device (4) moves downwards so that the air pressure in the liquid storage cavity (22) is generated, the air extrusion device (23) moves downwards to the air storage cavity (23) so that the air pressure in the air extrusion device (23) moves downwards, the novel combined type liquid-filled bottle is characterized in that a spring (8) capable of pushing the pressing head (7) to drive the pumping assembly to move upwards and reset to enable negative pressure to be generated in the liquid storage cavity (22) and the gas storage cavity (23) is arranged between the bottle locking cover (1) and the pressing head (7), a mixing channel (10) for enabling liquid flowing out of the liquid storage cavity (22) and gas flowing out of the gas storage cavity (23) to flow together to form mixed fluid is arranged in the pumping assembly, a liquid outlet end of the mixing channel (10) and the pressing head (7) are communicated, and when the mixed fluid passes through, the mixed fluid can be formed into a net through (9) of foam, and a uniform structure (91) for enabling the mixed fluid to flow together into the net through (9) after being split when the mixed fluid enters the net through (9) is arranged on the net through (9).

2. The discharge uniform foam pump of claim 1, wherein: the uniform structure (91) comprises a plurality of drainage channels (911) which are circumferentially arranged at intervals on the inlet end of the net through (9) and are communicated with the mixing channels (10) for the mixed fluid to flow in, and a confluence cavity (912) which is communicated with each drainage channel (911) and can cross and break up the mixed fluid flowing in each drainage channel (911), wherein a foaming net (92) for the mixed fluid after cross and break up is arranged on the outlet end of the net through (9).

3. The outfeed uniform foam pump of claim 2, wherein: the inlet end of the net through (9) is provided with a convex ring (93) extending along the axial direction of the net through (9), a plurality of convex blocks (931) extending towards the center of the convex ring (93) are arranged on the inner side of the convex ring (93), the convex blocks (931) enclose a confluence cavity (912), and drainage channels (911) are arranged on the convex ring (93) at intervals.

4. The outfeed uniform foam pump of claim 2, wherein: the air extrusion device (5) comprises an air compressing piston (51) which is arranged in the air storage cavity (23) in a relative sliding manner and one end of the air compressing piston penetrates out of the lock bottle cap (1) and is connected with the pressing head (7), an air inlet channel (20) for allowing external air of the lock bottle cap (1) to enter is formed between the outer wall of the air compressing piston (51) and the inner wall of the lock bottle cap (1), and an air valve (52) which can control the air storage cavity (23) to be communicated with the mixing channel (10) when the pressing head (7) drives the air compressing piston (51) to move upwards to reset when the pressing head (7) is pressed by the spring (8) to enable negative pressure to be generated in the air storage cavity (23) to be communicated with the air inlet channel (20) is arranged on the air compressing piston (51).

5. The discharge uniform foam pump according to claim 4, wherein: the liquid extrusion device (4) include that upper end is connected and is pressed air piston (51) and lower extreme stretches into catheter (41) in stock solution chamber (22), catheter (41) in be equipped with intercommunication mixing channel (10) and stock solution chamber (22) intercommunication mouth (411) and by pressing head (7) drive piston rod (42) that reciprocates, piston rod (42) open intercommunication mouth (411) and extrude liquid in stock solution chamber (22) from intercommunication mouth (411) flow direction mixing channel (10) when being driven by pressing head (7) and remove downwards, piston rod (42) be sealed when being driven by pressing head (7) intercommunication mouth (411).

6. The discharge uniform foam pump according to claim 5, wherein: the lower end of the pressing head (7) is provided with a plugging tube (71) communicated with the liquid outlet end of the pressing head (7), the net through (9) is arranged in the plugging tube (71), the plugging tube (71) is connected with the upper end of the air compressing piston (51) through a connecting pipe fitting (30), the upper end of the piston rod (42) is arranged on the connecting pipe fitting (30) in a penetrating way, and the connecting pipe fitting (30) is provided with a plurality of liquid outlet small holes (301) communicated with the mixing channel (10) and the drainage channel (911).

7. The discharge uniform foam pump according to claim 6, wherein: the upper end of connecting pipe fitting (30) is pegged graft on grafting pipe (71), the entry end of net leads to (9) is pegged graft in connecting pipe fitting (30) upper end, the upper end of piston rod (42) is pegged graft in the lower extreme of connecting pipe fitting (30), connecting pipe fitting (30) in be equipped with baffle (302) that separate connecting pipe fitting (30) inner chamber from top to bottom, the upper end of piston rod (42) wear to adorn on baffle (302), play liquid aperture (301) set up on baffle (302).

8. The discharge uniform foam pump according to claim 4, wherein: the utility model discloses a gas-filled piston (51) on be equipped with inlet port (511) of intercommunication inlet channel (20) and gas storage chamber (23), air valve (52) on be equipped with and support and lean on first sealed shell fragment (521) of inlet port (511) lower extreme seal, gas-filled piston (51) lower extreme be equipped with and supply liquid pipe (41) upper end to insert mounting groove (512) of installation, be equipped with between the outer wall of inner wall and liquid pipe (41) of mounting groove (512) and intercommunication gas storage chamber (23) and mixing channel (10) gas outlet channel (40), air valve (52) on be equipped with and support and lean on liquid pipe (41) make gas outlet channel (40) sealed second sealed shell fragment (522).

9. The discharge uniform foam pump of claim 1, wherein: the spring (8) comprises a plurality of elastic units which are connected from top to bottom.

10. The outfeed uniform foam pump of claim 9 wherein: the elastic unit comprises two oppositely arranged X-shaped elastic arms (81), the ends of the two X-shaped elastic arms (81) are connected in one-to-one correspondence and are surrounded to form a vertical through hole (82), and the X-shaped elastic arms (81) of the springs (8) positioned at the top and the bottom are respectively connected with a supporting connecting sheet (83).