CN213110540U

CN213110540U - Environmental protection foam pump

Info

Publication number: CN213110540U
Application number: CN202021995473.7U
Authority: CN
Inventors: 梁配辉; 朱茂勇; 张永雷; 梁金考
Original assignee: Zhongshan Majesty Packaging Systems Co Ltd
Current assignee: Guangdong Meijieshi Holdings Co ltd
Priority date: 2020-09-11
Filing date: 2020-09-11
Publication date: 2021-05-04
Anticipated expiration: 2030-09-11

Abstract

The utility model discloses an environment-friendly foam pump, which comprises a pump body, wherein the upper end of the pump body is fixedly provided with a lock bottle cap in an inserting way, the pump body comprises a large piston cylinder and a small piston cylinder, an air extrusion device is arranged in the large piston cylinder, a liquid extrusion device is arranged in the small piston cylinder, the air extrusion device comprises an air suction plug, a piston ring is arranged on the air suction plug, the upper part of the large piston cylinder is provided with an inwards-protruding buckle ring, the liquid extrusion device comprises a main column arranged in the small piston cylinder and a liquid suction plug connected with the lower end of the main column, the upper end of the air suction plug is fixedly provided with a press head in an inserting way, the upper end of the main column extends out of the large piston cylinder and is connected with the air suction plug, a network communication is arranged between the press head and the air suction plug, the outer side of the main column is sleeved with an elastic piece, the air suction plug is matched with the piston ring to limit the air suction plug in the large piston cylinder, and a pump core structure consisting of the, can be used with different bottle locking caps and pressing heads.

Description

Environmental protection foam pump

[ technical field ] A method for producing a semiconductor device

The utility model relates to an environmental protection foam pump.

[ background of the invention ]

Many foam pumps in the market at present adopt the structure of built-in spring, and the spring direct contact emulsion is not environmental protection enough. And the foam pump is generally of an integral structure, namely, the pump core, the lock bottle cover and the press head are assembled and fixed, and the use is not flexible enough.

The present invention is made based on such a situation.

[ Utility model ] content

The utility model aims at overcoming the defects of the prior art, providing an environmental protection foam pump which has the characteristics of simple structure, independent transportation, storage and flexible use.

The utility model discloses a realize through following technical scheme:

an environment-friendly foam pump comprises a pump body, wherein a bottle locking cover is fixedly inserted at the upper end of the pump body, the pump body comprises a large piston cylinder and a small piston cylinder which are arranged up and down, an air extrusion device capable of pumping air is arranged in the large piston cylinder, a liquid extrusion device capable of pumping liquid is arranged in the small piston cylinder, the air extrusion device comprises an air suction plug arranged in the large piston cylinder, a piston ring matched with the inner wall of the large piston cylinder is arranged on the air suction plug, a snap ring which protrudes inwards and limits the piston ring to be separated upwards is arranged at the upper part of the large piston cylinder, the liquid extrusion device comprises a main column arranged in the small piston cylinder and a liquid suction plug connected to the lower end of the main column, a press head is fixedly inserted at the upper end of the air suction plug, the upper end of the main column extends out of the large piston cylinder and is connected with the air suction plug, and the main column moves downwards along with the air suction plug when the press head is pressed downwards, a net channel for mixing air pumped by the air extrusion device and liquid pumped by the liquid extrusion device is arranged between the press head and the air suction plug, an elastic element capable of upwards jacking and lifting the main column and the air suction plug is sleeved outside the main column and above the liquid suction plug, and glass beads are arranged at the inlet at the lower end of the small piston cylinder.

An environmental protection foam pump as above, the air is inhaled and is equipped with the joint chamber on the stopper, joint chamber top is equipped with the hybrid chamber, the top of hybrid chamber is equipped with the blowout mouth, the joint intracavity is provided with a plurality of card posts that are used for the chucking principal post around the circumference interval, thereby the hybrid chamber is equipped with the blend stop that blocks the principal post from the top and fix a position the principal post, thereby form the air duct who supplies the air current in the big piston cylinder to the hybrid chamber between the inner wall in joint chamber, the outer wall of two adjacent card posts and principal post, air duct has a plurality ofly and centers on the outside at the principal post.

According to the environment-friendly foam pump, the air suction plug is provided with the insertion part for being inserted into the press head, and the side surface of the insertion part is provided with the convex ring which protrudes outwards and is used for being clamped with the press head.

The air suction plug is internally connected with a one-way valve for air to enter a large piston cylinder from the outside through the air replenishing hole, the air suction plug is internally provided with an annular fixing groove at the inner side of the air replenishing hole, the one-way valve comprises an annular valve post arranged in the fixing groove, and the lower end of the valve post is provided with an arc-shaped outer blade which has an upward concave surface and can elastically press the air suction plug to block the air replenishing hole.

An environmental protection foam pump as above, be equipped with outside convex annular platform on the outside of principal post, the outside of annular platform is equipped with the curb plate that slightly hangs down than annular platform, the curb plate is from the under bracing on the valve column bottom surface, it is equipped with the concave surface downwards and can elasticity roof pressure in the arc inner blade that blocks air channel on annular platform to surround its inboard on the lower extreme of valve column, the curb plate is provided with a plurality of along radial indent and supplies the air admission curb plate of curb plate below and the air circulation mouth in the space that the inner blade formed along its circumference interval.

According to the environment-friendly foam pump, the upper end of the small piston cylinder is provided with a stepped hole, the stepped hole is internally provided with an annular inward bulge which protrudes inwards, the elastic part is a metal spring, a spring seat for pushing the lower end of the elastic part is fixed between the large piston cylinder and the small piston cylinder, the outer side of the spring seat is provided with an outward bulge which is clamped below the inward bulge, the upper part of the spring seat extends out of the large piston cylinder and blocks the side plate from the lower part when the side plate moves downwards by one end distance, and the lower end of the spring seat is provided with a lifting height which extends into the small piston cylinder and is used for limiting the liquid suction plug.

According to the environment-friendly foam pump, the upper end of the small piston cylinder is provided with a stepped hole, the stepped hole is internally provided with an annular inward bulge which protrudes inwards, the elastic piece is a plastic spring, the upper end of the plastic spring is provided with a top ring which is used for being pressed on the side plate in a propping mode, the lower end of the plastic spring is provided with a bottom ring which is used for being inserted into the stepped hole and is in interference fit with the inward bulge, the upper end of the bottom ring is provided with a pressing ring which protrudes outwards and is pressed downwards on the outer edge of an upper port of the stepped hole, and the inner side of the bottom ring is provided with a limiting ring which extends into the small piston cylinder and is used for.

According to the environment-friendly foam pump, the plastic spring is a plastic spring pipe with openings at the upper end and the lower end and sealed and integrated on the side surface, the plastic spring pipe is integrally molded in a spiral mode through injection molding, and the plastic spring is of a left-handed structure or a right-handed structure.

According to the environment-friendly foam pump, the upper end of the pump body is provided with the inserting part which is used for being fixedly inserted with the lock bottle cap.

According to the environment-friendly foam pump, the insertion part is provided with the containing groove for containing the net, and the spraying port is communicated with the containing groove and the mixing cavity.

According to the environment-friendly foam pump, the bottle locking cover is provided with the neck protruding upwards, the press head is provided with the neck sleeve which is sleeved on the outer side of the neck and can move up and down, and the neck outer side is buckled with the clamping sleeve which can prevent the neck sleeve from moving downwards.

According to the environment-friendly foam pump, the plug socket for inserting the press head is formed in the lock bottle cap, the press head does not exceed the outer side of the lock bottle cap, and the outer cover capable of covering the press head on the inner side is buckled above the lock bottle cap.

Compared with the prior art, the utility model discloses there is following advantage:

1. the utility model discloses simple structure, it is convenient to make, cooperate through buckle ring and piston ring, inhale the stopper restriction with the air in big piston cylinder, make when not installing the lock bottle lid, the air is inhaled and also can not deviate from big piston cylinder when the vibration, thereby fix air extrusion device and liquid extrusion device between the stopper is inhaled to the air and the pump body, make not install the lock bottle lid and when pressing the head, inhale the stopper by the pump body, the air extrusion device, the transportation that the pump core structure that liquid extrusion device and glass pearl are constituteed can be independent, store and sell, so that in the equipment production process of foam pump, can cooperate different lock bottle lid and use according to the head, increase the flexibility of production.

2. The utility model discloses a set up the concave surface up and can the outer blade of arc that the elasticity roof pressure blocked with the tonifying qi hole on the air suction plug in the lower extreme outside that encircles the annular valve post, form the one-way valve structure in the space that the air feed got into the air suction plug from the outside and between the big piston cylinder, outer blade adopts the thin wall design, simple structure, and the laminating leakproofness is good.

3. The utility model discloses a set up annular platform on the outside of principal post the lower extreme of valve post is gone up to surround its inboard and is equipped with the concave surface down and can elasticity roof pressure the arc inner blade that blocks air passage at annular bench, and the inner blade adopts the thin wall design, forms the one-way valve structure that supplies the air to flow to the hybrid chamber in inhaling the space between stopper and the big piston jar from the air, and simple structure inhales the hybrid chamber and above the air liquid mixed liquid when the space between stopper and the big piston jar forms the negative pressure with the hybrid chamber in can avoiding the air to inhale.

4. The bounce structure can adopt a plastic spring or a metal spring, and various requirements of users are met.

5. The plastic spring is a plastic spring pipe with an opening at the upper end and an opening at the lower end and a sealed side face, and is integrally molded by screw injection, and the plastic spring is of a left-handed structure or a right-handed structure, so that the plastic spring is simple in structure, convenient to produce and good in elasticity.

6. The press head can be protected by an outer cover or a card sleeve, so that the selectivity of a user is stronger.

[ description of the drawings ]

The following detailed description of embodiments of the present invention is provided with reference to the accompanying drawings, in which:

FIG. 1 is a cross-sectional view of one embodiment of an eco-foam pump of the present invention;

FIG. 2 is a cross-sectional view of the pump cartridge;

FIG. 3 is a schematic view of the combined pump body and main column;

FIG. 4 is a bottom view of the pump body and main column in combination;

FIG. 5 is a schematic view of the air sucking plug;

FIG. 6 is a schematic structural view of the button head limited in up-and-down movement by the ferrule;

FIG. 7 is a schematic view of the structure in which the button is protected inside by the outer cover;

FIG. 8 is a cross-sectional view of an embodiment of the eco-friendly foam pump of the present invention employing a plastic spring;

fig. 9 is a schematic structural view of a plastic spring.

[ detailed description ] embodiments

The invention will be further described with reference to the accompanying drawings:

as shown in fig. 1 to 9, an environment-friendly foam pump comprises a pump body 1, a bottle locking cap 10 is fixedly inserted into the upper end of the pump body 1, the pump body 1 comprises a large piston cylinder 11 and a small piston cylinder 12 which are arranged up and down, an air extrusion device capable of pumping air is arranged in the large piston cylinder 11, a liquid extrusion device capable of pumping liquid is arranged in the small piston cylinder 12, the air extrusion device comprises an air suction plug 2 arranged in the large piston cylinder 11, a piston ring 21 matched with the inner wall of the large piston cylinder 11 is arranged on the air suction plug 2, a snap ring 13 which protrudes inwards and limits the piston ring 21 to be separated upwards is arranged on the upper portion of the large piston cylinder 11, the liquid extrusion device comprises a main column 3 arranged in the small piston cylinder 12 and a liquid suction plug 4 connected to the lower end of the main column 3, a press head 9 is fixedly inserted into the upper end of the air suction plug 2, the upper end of the main column 3 extends out of the large piston cylinder 11 and is connected with the air suction plug 2, when the press head 9 is pressed downwards, the main column 3 moves downwards along with the air suction plug 2, a net through 100 for mixing air pumped by the air extrusion device and liquid at the pumping position of the liquid extrusion device is arranged between the press head 9 and the air suction plug 2, an elastic piece 5 capable of upwards jacking and lifting the main column 3 and the air suction plug 2 is sleeved outside the main column 3 and above the liquid suction plug 4, and glass beads 6 are arranged at an inlet at the lower end of the small piston cylinder 12. The air suction plug 2 is limited in the large piston cylinder 11 through the matching of the snap ring 13 and the piston ring 21, so that when the bottle cap 10 is not installed, the air suction plug 2 cannot be separated from the large piston cylinder 11 during vibration, the air extrusion device and the liquid extrusion device are fixed between the air suction plug 2 and the pump body 1, when the bottle cap 10 is not installed and the press head 9 is not installed, the pump core structure consisting of the pump body 1, the air suction plug 2, the air extrusion device, the liquid extrusion device and the glass beads 6 can be independently transported, stored and sold, so that in the assembly production process of the foam pump, the foam pump can be used by matching with different bottle caps 10 and press heads 9, and the production flexibility is increased.

As shown in fig. 5, the air suction plug 2 is provided with a clamping cavity 22, a mixing cavity 23 is arranged above the clamping cavity 22, a spraying port 24 is arranged at the top of the mixing cavity 23, a plurality of clamping columns 25 for clamping the main column 3 are arranged in the clamping cavity 22 at intervals along the circumferential direction, a barrier 26 for blocking the main column 3 to position the main column 3 is arranged in the mixing cavity 23, an air channel 27 for allowing air in the large piston cylinder 11 to flow to the mixing cavity 23 is formed between the inner wall of the clamping cavity 22, the two adjacent clamping columns 25 and the outer wall of the main column 3, the air channel 27 is provided with a plurality of air channels 27 and surrounds the outer side of the main column 3, so that the air is divided into a plurality of air channels 27 to surround the liquid flow after being flushed out, and no vortex is generated through pressurization and diffusion, and the structure is simple.

As shown in fig. 1 to 3 and fig. 6 to 8, in the embodiment, the air suction plug 2 is provided with an insertion portion 28 for being inserted into the button 9, and a side surface of the insertion portion 28 is provided with a protruding ring 281 protruding outward and for being clamped with the button 9.

As shown in the embodiment of fig. 1 to 8, the air suction plug 2 is provided with the air replenishing hole 29, the air suction plug 2 is connected with the check valve 7 for allowing air to enter the large piston cylinder 11 from the outside through the air replenishing hole 29, the air suction plug 2 is provided with an annular fixing groove 210 on the inner side of the air replenishing hole 29, the check valve 7 comprises an annular valve post 71 installed in the fixing groove 210, the lower end of the valve post 71 is provided with an outer arc-shaped blade 72 which has an upward concave surface around the outer side and can elastically press the air suction plug 2 to block the air replenishing hole 29, and a check valve structure for allowing air to enter the space between the air suction plug 2 and the large piston cylinder 11 from the outside is formed.

The outer side of the main column 3 is provided with an annular table 32 protruding outwards, the outer side of the annular table 32 is provided with a side plate 31 slightly lower than the annular table 32, the side plate 31 is supported on the bottom surface of the valve column 71 from the lower side, the structure is stable and reliable, the lower end of the valve column 71 is provided with an arc inner blade 73 with a concave surface downwards surrounding the inner side and capable of elastically pressing the annular table 32 to block the air channel 27, and the side plate 31 is provided with a plurality of air flow openings 33 inwards recessed along the radial direction at intervals along the circumferential direction and used for allowing air below the side plate 31 to enter a space formed by the side plate 31 and the inner blade 73. The inner blade 73 is pressed on the annular table 32 to form a one-way valve structure for air to pass through from bottom to top, the structure is simple, and the phenomenon that the air-liquid mixed liquid in the mixing cavity 23 and above is sucked into the large piston cylinder 11 when the space between the air suction plug 2 and the large piston cylinder 11 forms negative pressure can be avoided.

As an embodiment of the elastic member 5, as shown in fig. 1, 2, 6 and 7, the elastic member 5 is a metal spring, the upper end of the small piston cylinder 12 is provided with a stepped hole 14, an annular inner protrusion 140 protruding inward is arranged in the stepped hole 14, a spring seat 8 for pressing the lower end of the elastic member 5 is fixed between the large piston cylinder 11 and the small piston cylinder 12, an outer protrusion 81 protruding outward and clamped under the inner protrusion 140 is arranged on the outer side of the spring seat 8, the upper portion of the spring seat 8 extends in the large piston cylinder 11 and blocks the side plate 31 from below when the side plate 31 moves downward for a certain distance, and the lower end of the spring seat 8 is provided with a protrusion extending in the small piston cylinder 12 and used for limiting the rising height of the liquid suction plug 4, which is simple in structure and convenient to assemble.

As another embodiment of the elastic member 5, as shown in fig. 8 and 9, the elastic member 5 is a plastic spring, which is environmentally friendly, safe and easy to recycle. The upper end of the small piston cylinder 12 is provided with a stepped hole 14, an annular inward protrusion 140 protruding inwards is arranged in the stepped hole 14, the upper end of the plastic spring is provided with a top ring 51 used for being pressed against the side plate 31, the lower end of the plastic spring is provided with a bottom ring 52 used for being inserted into the stepped hole 14 and being in interference fit with the inward protrusion 140, the upper end of the bottom ring 52 is provided with a pressing ring 53 protruding outwards and pressing downwards on the outer edge of an upper port of the stepped hole 14, and the inner side of the bottom ring 52 is provided with a limiting ring 54 extending into the small piston cylinder 12 and used for limiting the rising height of the liquid suction plug 4.

The plastic spring is a plastic spring pipe with an upper end and a lower end opened and side surfaces sealed into a whole, and is integrally molded in a spiral mode through injection molding, the plastic spring is of a left-handed structure or a right-handed structure, and the plastic spring is simple in structure, convenient to produce and good in elasticity.

In order to facilitate assembly and fixation with the lock bottle cap 10, the upper end of the pump body 1 is provided with an insertion part 15 for insertion and fixation with the lock bottle cap 10.

As shown in fig. 1 to 3 and fig. 6 to 8, in order to assemble the net-shaped member 100, the insertion portion 28 is provided with a receiving groove 282 for receiving the net-shaped member 100, the ejection port 24 communicates with the receiving groove 282 and the mixing chamber 23, and after the net-shaped member 100 is received in the receiving groove 282, the pressing head 9 restricts the net-shaped member 100.

As shown in fig. 6, in order to prevent the solution in the bottle from flowing out when the pressing head 9 is pressed during non-use processes such as transportation and storage, the bottle locking cap 10 is provided with a neck 101 which protrudes upwards, the pressing head 9 is provided with a neck sleeve 91 which is sleeved outside the neck 101 and can move up and down, the outer side of the neck 101 is buckled with a clamping sleeve 103 from the side, and the clamping sleeve 103 blocks the downward movement of the neck sleeve 91 from the lower part, so that the pressing head 9 cannot be pressed down. In use, the ferrule 103 is laterally removed from the outside of the neck 101 to allow the push head 9 to move up and down.

As shown in fig. 7 and 8, as another embodiment for preventing the solution in the bottle from flowing out due to the pressing of the press head 9 during non-use, such as transportation and storage, a socket 102 for inserting the press head 9 is provided on the lock bottle cap 10, the press head 9 does not exceed the outer side of the lock bottle cap 10, an outer cover 104 capable of covering the press head 9 on the inner side is fastened on the upper side of the lock bottle cap 10, the press head 9 is protected by the outer cover 104, the press head 9 is prevented from being pressed, and the press head 9 can be removed when in use.

When the air compressor is used, the press head 9 is pressed down, the air suction plug 2, the main column 3 and the liquid suction plug 4 are pressed down together through the press head 9, the air in the large piston cylinder 11 is pumped out through the air suction plug 2, namely, the air in the closed space between the large piston cylinder 11 and the air suction plug 2 is compressed, and the air rushes the inner blade 73 to flow out; meanwhile, after the main column 3 moves downwards for a certain distance, the communication channel between the main column 3 and the small piston cylinder 12 is opened, the liquid suction plug 4 is driven to move downwards to pump the solution in the small piston cylinder 12 out through the main column 3, and the pumped air and liquid form foam through the net through 100 and then are sprayed out. After the external force acting on the press head 9 is released, under the action of the elastic piece 5, the press head 9, the air suction plug 2, the main column 3 and the liquid suction plug 4 are lifted upwards, wherein a negative pressure is formed in a closed space between the air suction plug 2 and the large piston cylinder 11, the one-way valve structure corresponding to the inner blade 73 is closed, the one-way valve structure corresponding to the outer blade 72 is opened, and air is supplied from the air supply hole 29 to the inside; meanwhile, after the main column 3 moves upwards for a certain distance, the communication channel between the main column 3 and the small piston cylinder 12 is closed, and the liquid sucking plug 4 is driven to move upwards, so that negative pressure is formed in the small piston cylinder 12, and the solution in the bottle rushes the glass beads 6 under the action of atmospheric pressure and flows into the small piston cylinder 12.

Claims

1. An environmental protection foam pump which characterized in that: the pump comprises a pump body (1), a bottle locking cap (10) is fixedly inserted into the upper end of the pump body (1), the pump body (1) comprises a large piston cylinder (11) and a small piston cylinder (12) which are arranged up and down, an air extrusion device capable of pumping air is arranged in the large piston cylinder (11), a liquid extrusion device capable of pumping liquid is arranged in the small piston cylinder (12), the air extrusion device comprises an air suction plug (2) arranged in the large piston cylinder (11), a piston ring (21) matched with the inner wall of the large piston cylinder (11) is arranged on the air suction plug (2), a clamping ring (13) which protrudes inwards and limits the piston ring (21) to be separated upwards is arranged at the upper part of the large piston cylinder (11), the liquid extrusion device comprises a main column (3) arranged in the small piston cylinder (12) and a liquid suction plug (4) connected to the lower end of the main column (3), the air suction plug is characterized in that a press head (9) is fixedly inserted into the upper end of the air suction plug (2), the upper end of the main column (3) extends out of a large piston cylinder (11) and is connected with the air suction plug (2), the main column (3) moves downwards along with the air suction plug (2) when the press head (9) is pressed downwards, a network channel (100) for mixing air pumped by an air extrusion device and liquid pumped by a liquid extrusion device to pass is arranged between the press head (9) and the air suction plug (2), an elastic piece (5) capable of upwards jacking and lifting the main column (3) and the air suction plug (2) together is sleeved on the outer side of the main column (3) and above the liquid suction plug (4), and a glass bead (6) is arranged at the inlet at the lower end of the small piston cylinder (12).

2. The environmentally friendly foam pump of claim 1, wherein: be equipped with joint chamber (22) on air suction plug (2), joint chamber (22) top is equipped with hybrid chamber (23), the top of hybrid chamber (23) is equipped with blowout port (24), thereby be provided with a plurality of card post (25) that are used for chucking king post (3) around the circumference interval in joint chamber (22), thereby be equipped with barrier strip (26) that block king post (3) location king post (3) from the top in hybrid chamber (23), thereby form air channel (27) that supply the air flow direction hybrid chamber (23) in big piston jar (11) between the outer wall of inner wall, two adjacent card posts (25) and king post (3) of joint chamber (22), air channel (27) have a plurality ofly and around the outside in king post (3).

3. The environmentally friendly foam pump of claim 2, wherein: be equipped with on air suction plug (2) and be arranged in inserting portion (28) in pressing head (9), be equipped with outside protrusion on the side of inserting portion (28) and be used for with protruding ring (281) of pressing head (9) joint.

4. The environmentally friendly foam pump of claim 2, wherein: be equipped with tonifying qi hole (29) on air suction plug (2), be connected with check valve (7) that supply air to get into in big piston cylinder (11) from tonifying qi hole (29) from the outside on air suction plug (2), the inboard that air suction plug (2) were gone up and are located tonifying qi hole (29) is equipped with annular fixed slot (210), check valve (7) are including installing annular valve post (71) in fixed slot (210), it is equipped with arc outer blade (72) that the concave surface up and can elasticity roof pressure blocked tonifying qi hole (29) on air suction plug (2) to encircle its outside on the lower extreme of valve post (71).

5. The environmentally friendly foam pump of claim 4, wherein: be equipped with outside convex annular platform (32) on the outside of principal post (3), the outside of annular platform (32) is equipped with curb plate (31) that slightly is lower than annular platform (32), curb plate (31) from the under bracing on valve post (71) bottom surface, be equipped with the concave surface down and can elasticity roof pressure arc inner vane (73) of blocking air channel (27) on annular platform (32) around its inboard on the lower extreme of valve post (71), curb plate (31) are provided with a plurality of along radial indent and air admission curb plate (31) and the air current opening (33) in the space that inner vane (73) formed along its circumference interval of confession curb plate (31) below.

6. The environmentally friendly foam pump of claim 5, wherein: the upper end of the small piston cylinder (12) is provided with a stepped hole (14), an annular inward protrusion (140) protruding inwards is arranged in the stepped hole (14), the elastic part (5) is a metal spring, a spring seat (8) for enabling the lower end of the elastic part (5) to be pressed against is fixed between the large piston cylinder (11) and the small piston cylinder (12), an outward protrusion (81) protruding outwards and clamped below the inward protrusion (140) is arranged on the outer side of the spring seat (8), the upper portion of the spring seat (8) extends out of the large piston cylinder (11) and blocks the side plate (31) from below when the side plate (31) moves downwards by one end distance, and the lower end of the spring seat (8) is provided with a lifting height extending into the small piston cylinder (12) and used for limiting the liquid suction plug (4).

7. The environmentally friendly foam pump of claim 5, wherein: the upper end of the small piston cylinder (12) is provided with a stepped hole (14), an annular inward protrusion (140) protruding inwards is arranged in the stepped hole (14), the elastic piece (5) is a plastic spring, the upper end of the plastic spring is provided with a top ring (51) used for being pressed against the side plate (31), the lower end of the plastic spring is provided with a bottom ring (52) used for being inserted into the stepped hole (14) and being in interference fit with the inward protrusion (140), the upper end of the bottom ring (52) is provided with a pressing ring (53) protruding outwards and pressing downwards on the outer edge of an upper port of the stepped hole (14), and the inner side of the bottom ring (52) is provided with a limiting ring (54) extending into the small piston cylinder (12) and used for limiting the rising height of the liquid suction plug (4).

8. The environmentally friendly foam pump of claim 7, wherein: the plastic spring is a plastic spring pipe with openings at the upper end and the lower end and sealed into a whole at the side surface, and is integrally molded by injection in a spiral mode, and the plastic spring is in a left-handed structure or a right-handed structure.

9. The environmentally friendly foam pump of claim 1, wherein: the upper end of the pump body (1) is provided with an inserting part (15) which is used for being inserted and fixed with the lock bottle cap (10).

10. An environmental friendly foam pump as defined in claim 3 wherein: the insertion part (28) is provided with a containing groove (282) for containing the net through (100), and the ejection port (24) is communicated with the containing groove (282) and the mixing cavity (23).