CN212354957U

CN212354957U - Lightweight antistatic foam pump

Info

Publication number: CN212354957U
Application number: CN202020844484.9U
Authority: CN
Inventors: 黄建艺
Original assignee: Z&z Development Co ltd
Current assignee: Z&z Development Co ltd
Priority date: 2020-05-19
Filing date: 2020-05-19
Publication date: 2021-01-15
Anticipated expiration: 2030-05-19

Abstract

The utility model relates to a static foam pump is prevented to lightweight is owed rationally to the pump body inner space design of current like product, lacks the technical problem of double piston and connecting seat structural design and designs. The foam cylinder is characterized in that the piston in the cylinder body comprises a large piston and a small piston, the valve needle is sleeved into a through hole in the valve rod from one end of the valve rod, the valve needle in the valve rod is fixedly connected with one end of the small piston sleeved from the other end of the valve rod in a buckling manner, a spring pad is sleeved on the outer diameter of the valve rod at the fixedly connected part of the rod part of the small piston and the valve needle in the buckling manner, a raised ring rib is arranged on the outer diameter of the sleeved end of the valve needle of the valve rod, one end of the spring abuts against the ring rib of; the external diameter of little piston offsets with the thin inner chamber wall of the bullet cover department top of the pump body and seals, and the external diameter of big piston offsets with the big inner chamber wall of thin inner chamber top in the pump body and seals, and the duckbill passes through the connecting seat to be connected with the valve rod, and the leaf circle department external diameter of big piston is equipped with the air channel, and the pump body height of this foam pump is less.

Description

Lightweight antistatic foam pump

Technical Field

The utility model relates to a miniature foam pump is a static foam pump is prevented to lightweight.

Background

The foam pump is a pump body capable of generating foam ejection, and is generally classified into an industrial foam pump, a fire-fighting foam pump, and a micro foam pump according to the purpose and size thereof. The working principle of the micro foam pump is that certain negative pressure is formed around a liquid column after liquid is sprayed at a high speed, and the negative pressure generates suction gas to enter a mixing part, so that air and liquid are mixed again and quickly pass through a silk screen to form foam. The foam pump is mainly applied to cosmetic bottle containers such as facial cleanser, and the like, such as application number 201610345084.1 published in Chinese patent literature, application publication date 2016.09.07, entitled "pressing type foam pump and spraying amount control method thereof"; the sleeving part of a valve rod and a pump body of the foam pump is respectively provided with a convex buckling ring protruding outwards and a conical limiting opening, the pressing stroke of a duckbill driven piston is the stroke of the valve rod outer diameter limiting ring moving downwards to abut against the limiting opening on the pump body, the limiting opening of the pump body is provided with a cylindrical glue position protruding into the pump body, and the cylindrical glue position, the limiting opening and the pump body are molded into a whole by injection; the foam pump changes the discharge amount of the foam pump only by changing the structure of the limit port in the pump body on the basis of not changing the whole structure of the foam pump, namely, the length of a cylindrical rubber position is used for controlling the pressing stroke of a piston, so that the discharge amount of the foam pump is controlled. However, the pump body of the product and the like occupies a large space of parts in the pump body, and the height of the pump body is large, so that the height of the matched bottle body is high, and the carrying and the use of the product are influenced.

Disclosure of Invention

In order to overcome the defects, the utility model aims to provide a light-weight antistatic foam pump to the field, so that the space design in the pump body of the existing like product is less reasonable, the whole structure design is poor, and the technical problem of the structural design of double pistons and connecting seats is especially lacked. The purpose is realized by the following technical scheme.

A lightweight antistatic foam pump is characterized in that the outer diameter of the inner ring diameter in a large ring of the foam pump is sleeved in the inner diameter of a pump opening of a pump body, the outer diameter of the pump opening of the pump body is sleeved with the inner ring diameter of the large ring in a rib position matched with the inner ring diameter, a piston, a valve rod, a valve needle, a spring and a spring sleeve are arranged in the pump body, the spring sleeve is arranged at a water inlet in the pump body, a spring sheet in the middle of the spring sleeve is abutted against a convex rib of the orifice of the water inlet in the pump body, and the valve rod extending; the pump is structurally characterized in that a piston in the pump body comprises a large piston and a small piston, a valve needle is sleeved into a through hole in a valve rod from one end of the valve rod, the valve needle in the valve rod is fixedly connected with one end of the small piston sleeved from the other end of the valve rod in a buckling manner, a spring pad is sleeved on the outer diameter of the valve rod at the fixedly connected part of the rod part of the small piston and the valve needle in the buckling manner, a raised ring rib is arranged on the outer diameter of the sleeved end of the valve needle of the valve rod, one end of the spring abuts against the ring rib of; the outer diameter of the small piston is abutted and sealed with the wall of the thin inner cavity above the elastic sleeve of the pump body, the outer diameter of the large piston is abutted and sealed with the wall of the large inner cavity above the thin inner cavity in the pump body, the inner diameter of the large-circle inner ring at the pump opening of the pump body above the large piston is provided with a connecting seat, a duckbill is connected with the valve rod through the connecting seat, and one side of the pump body above the large piston at the joint of the large-circle inner pump body and the large circle is provided with a through hole, so that the external air pressure inside the bottle body matched with the large circle is equal when the foam pump is used, the bottle body is not flat; an air gap channel is arranged between the connecting seat and the large piston, a vent groove is arranged on the outer diameter of the leaf ring of the large piston, and an air gap channel is arranged between the large piston and the valve rod; a first liquid inlet channel is formed between the outer diameter of the valve needle and the inner wall of the valve rod, and a second air inlet channel is formed between the inner diameter of the connecting seat and the outer diameter of the valve rod; the large ring is a light anti-static large ring, and the pump body is a light anti-static pump body. When pressing the duckbill, big piston and connecting seat remove to the through-hole below, and the gas clearance passageway between connecting seat and the big piston offsets and closes and the gas clearance passageway between big piston and the valve rod is opened, and when loosening the duckbill, the gas clearance passageway between connecting seat and the big piston is opened and the gas clearance passageway between big piston and the valve rod is closed. Therefore, when the duckbill is pressed, liquid of the upper pump enters the opening part of the connecting seat through the suction pipe, the elastic sleeve, the thin inner cavity in the pump body and the gap between the small piston and the valve needle in the valve rod, meanwhile, as the duckbill drives the downward pressure of the piston and the sealing among all parts, gas can only enter the opening part of the connecting seat through the large inner cavity in the pump body and enter the large piston, the connecting seat and the gap between the valve rods, and the gas is converged with the liquid of the upper pump and quickly generates rich foam through the filter plug and the silk screen to be sprayed out from the duckbill; when the duckbill is loosened and rebounded, air enters the duckbill and large ring gap channel from the outside, then enters the pump body cavity at the upper part of the large piston through the connecting seat and the large ring gap channel, finally enters the blade ring vent groove of the large piston through the connecting seat and the large piston gap channel and returns to the large inner cavity in the pump body, and the outside is kept equal to the air pressure in the large inner cavity in the pump body.

The small piston is a special-shaped small piston, the small piston is T-shaped, and a corresponding T-shaped hole is formed in the small piston; the big piston is the big piston of dysmorphism, and the piston leaf circle external diameter of big piston is equipped with the bellied interior muscle platform of step successive layer that makes progress, and the top circle mouth of the interior muscle platform higher than piston leaf circle of big piston, the internal diameter that the connecting seat was emboliaed to the interior muscle platform of big piston. The embodiment is designed for the specific structure of the small piston and the large piston which can meet the requirements of normal operation of the foam pump and reduce the occupation of the internal space.

The inner diameter shape of the connecting seat corresponds to the upper part of the inner rib platform of the large piston, and a space is arranged between the outer diameter of the connecting seat and the inner diameter of the inner ring diameter of the large ring; a convex upper inner ring is arranged above the diameter of the inner ring of the large ring, and a distance is arranged between the outer diameter of the bottom ring opening of the duckbill and the inner diameter of the upper inner ring of the large ring; an upward convex transition cavity is arranged between the thin inner cavity and the large inner cavity of the pump body, and the shape of the transition cavity of the pump body corresponds to the lower part of the inner rib platform of the large piston. The aforesaid further makes things convenient for the setting of connecting seat in the pump body to and the stability of the pressing operation stroke of duckbilled, and when satisfying pump body in-service use, reduce the height of the pump body.

The top of the ring rib of the valve rod is in sealing and abutting contact with the bottom of the leaf ring of the large piston through a spring with the outer diameter of the valve rod. The structure is convenient for further sealing and leakage prevention of liquid in the pump body, and the blade ring of the large piston plays a role of a sealing ring.

When the button head of needle and the interior buckle ring lock of the pole portion drill way of little piston, the needle through the first step circle of external diameter with the valve rod inner wall step face of step circle department is equipped with tiny clearance, the little piston external diameter of button head department is equipped with the toper and upwards outwards opens the circle mouth, the circle mouth of little piston offsets with the inner wall of valve rod and seals, the last drill way department internal diameter suit of the second step circle of tail department of needle and valve rod, the last drill way department external diameter of valve rod and the hole suit of connecting seat. The specific structural embodiment of the assembling connection among the valve needle, the small piston and the valve rod is described above.

The tail end of the valve needle is internally provided with a T-shaped inner cavity groove, the inner diameter of an upper orifice of the valve rod is provided with an inner ring groove, the bottom of the inner ring groove of the valve rod is provided with a downward extending sinking groove, the outer diameter of the tail end of the valve needle is sleeved with a second step ring inclined plane at the sinking groove opening of the inner ring groove of the valve rod, and a fine gap is arranged between the outer diameter of the tail end of the valve needle and the inner wall of the inner ring groove of the valve rod. The structure further ensures the circulation of the gap between the valve needle and the valve rod at the orifice of the valve rod, and the sealing and leakage prevention of the liquid in the valve rod.

The inner wall of the thin inner cavity of the pump body at the position of the spring pad is provided with a limiting step, and the spring pad is limited at the position of the limiting step in the pump body. The spring cushion is convenient to limit and fix.

Be equipped with in the duckbilled and filter the stopper, filter the both ends drill way punishment of stopper and be equipped with first silk screen and second silk screen respectively. The above structure facilitates enhancement of the foam generating effect.

The utility model has reasonable structural design, convenient use, assembly and production, good stability and sealing performance, and small height and space occupation of the pump body; is suitable for being used as a foam pump and the structural improvement of the like products.

Drawings

Fig. 1 is a schematic view of the sectional structure of the initial state of the present invention, wherein three frames are enlarged, and the arrows are in the gas direction.

Fig. 2 is a schematic sectional structure view of fig. 1 in a pressed state, in which arrows indicate directions of gas and liquid.

Fig. 3 is a schematic view of the assembly structure of parts of the present invention.

Fig. 4 is a schematic diagram of the explosion structure of the valve rod and the large piston of the present invention.

Fig. 5 is a schematic view of the explosion structure of the small piston, the valve rod and the large piston of the present invention.

Fig. 6 is a schematic diagram of the structure of the elastic sleeve of the present invention.

The names of the sequence numbers in the figure are: 1. the straw, 2, the pump body, 201, the through-hole, 202, spacing step, 3, the elastic sleeve, 4, little piston, 5, spring pad, 6, spring, 7, the needle, 701, the pintle head, 702, first step circle, 703, the tail, 8, the valve rod, 801, circle muscle, 9, the big circle, 10, big piston, 1001, the leaf circle, 11, the gasket, 12, the connecting seat, 13, first silk screen, 14, filter plug, 15, second silk screen, 16, the duckbilled, 17, the dustcoat.

Detailed Description

The invention will now be further described with reference to the accompanying drawings. As shown in fig. 1-6, the outer diameter of the inner ring diameter in the large ring 9 of the foam pump is sleeved in the inner diameter of the pump opening of the pump body 2, meanwhile, the outer diameter of the pump opening of the pump body is sleeved with the inner ring diameter matching rib position of the large ring, a gasket 11 is arranged at the sleeved position, a piston is arranged in the pump body, a spring pad 5, a connecting seat 12, a valve rod 8, a valve needle 7, a spring 6 and a spring sleeve 3 are arranged in the pump body, the spring sleeve is arranged at a water inlet hole in the pump body, a suction pipe 1 is arranged at the water inlet hole of the pump body, a spring sheet in the middle of the spring sleeve is abutted to a hole opening convex rib of the water inlet hole in the pump body, the valve rod extending out of the pump body is connected with a duckbill 16 through the connecting seat 12, a filter plug 14 is arranged in the duckbill, a. The piston comprises a large piston 10 and a small piston 4, the small piston is a special-shaped small piston, the small piston is T-shaped, and a corresponding T-shaped hole is formed in the small piston; the big piston is the big piston of dysmorphism, and the piston leaf circle external diameter of big piston is equipped with the bellied interior muscle platform of step successive layer that makes progress, and the top circle mouth of the interior muscle platform higher than piston leaf circle of big piston, the internal diameter of connecting seat 12 is gone into to the interior muscle platform cover of big piston. When the valve needle is sleeved into the through hole in the valve rod from one end of the valve rod, the valve needle in the valve rod is fixedly connected with one end of a small piston sleeved with the other end of the valve rod in a buckling mode, a spring pad 5 is sleeved on the outer diameter of the valve rod at the buckling and fixing connection position of the rod part of the small piston and the valve needle, a raised ring rib 801 is arranged on the outer diameter of the sleeved end of the valve needle of the valve rod, one end of a spring 6 is abutted against the ring rib of the valve rod, and. The outer diameter of the small piston is abutted and sealed with the wall of the thin inner cavity above the elastic sleeve of the pump body, the outer diameter of the large piston is abutted and sealed with the wall of the large inner cavity above the thin inner cavity in the pump body, the inner diameter of the diameter ring opening of the large ring inner ring at the pump opening of the pump body above the large piston is provided with a connecting seat, and one side of the pump body above the large piston at the sleeving position of the large ring inner pump body and the large ring is provided with a through hole 201. The inner diameter shape of the connecting seat corresponds to the upper part of the inner rib platform of the large piston, and a space is arranged between the outer diameter of the connecting seat and the inner ring diameter of the large ring; a convex upper inner ring is arranged above the diameter of the inner ring of the large ring, and a distance is arranged between the outer diameter of the bottom ring opening of the duckbill and the inner diameter of the upper inner ring of the large ring; an upward convex transition cavity is arranged between the thin inner cavity and the large inner cavity of the pump body, and the shape of the transition cavity of the pump body corresponds to the lower part of the inner rib platform of the large piston.

The top of the ring rib of the valve rod is abutted against the bottom of the leaf ring of the large piston through the spring seal of the outer diameter of the valve rod, when the buckling nail head 701 of the valve needle is buckled with the buckling ring in the rod orifice of the small piston, the valve needle passes through the first step ring 702 of the outer diameter and the step surface of the inner wall of the valve rod at the step ring, a small gap is formed between the step surface of the inner wall of the valve rod at the step ring, the outer diameter of the small piston at the buckling nail head is provided with a ring opening which is upwards and outwards opened in a conical shape, the ring opening of the small piston is abutted against the inner wall of the valve rod for sealing, the tail end 703 of the valve needle is sleeved with the inner diameter of the upper. The tail end of the valve needle is internally provided with a T-shaped inner cavity groove, the inner diameter of an upper orifice of the valve rod is provided with an inner ring groove, the bottom of the inner ring groove of the valve rod is provided with a downward extending sinking groove, the outer diameter of the tail end of the valve needle is provided with a second step ring inclined plane which is sleeved on the sinking groove opening of the inner ring groove of the valve rod, and a fine gap is arranged between the outer diameter of the tail end of the valve needle and the inner wall of the inner ring groove of the valve rod, so that the valve needle is sleeved and fixed. The inner wall of the thin inner cavity of the pump body at the position of the spring pad 5 is provided with a limiting step 202, and the spring pad is limited at the position of the limiting step in the pump body.

In the structure, an air gap channel is arranged between the connecting seat and the large piston, a plurality of vent grooves are arranged at the leaf ring of the large piston, and an air gap channel is arranged between the large piston and the valve rod; first liquid inlet channels are arranged between the outer diameters of the thin inner cavity of the pump body, the central hole of the small piston and the valve needle and the inner wall of the valve rod, and second air inlet channels are arranged between the large inner cavity of the pump body, the leaf ring vent groove of the large piston, the large piston and the valve rod, the large piston and the connecting seat and the outer diameters of the inner diameter valve rod of the connecting seat. When the duckbill is pressed, the large piston and the connecting seat move towards the lower part of the through hole, the air gap channel between the connecting seat and the large piston is closed in a propping manner, and the air gap channel between the large piston and the valve rod is opened; when the duck bill is loosened, the air gap channel between the connecting seat and the large piston is opened and the air gap channel between the large piston and the valve rod is closed.

The foam pump is an external single-spring foam pump, and the working principle is as follows: as shown in fig. 2, during the state of pressing, because atmospheric pressure principle liquid arrives connecting seat and valve rod registrate department from leading to the liquid route, simultaneously because sealed between each part, the gaseous clearance of arriving connecting seat and valve rod registrate department from the part of big piston below of the big inner chamber department of pump body inside, liquid produces abundant foam through first silk screen and second silk screen because strong atmospheric pressure drives down fast this moment, from duckbilled mouth blowout. As shown in figure 1, during the resilience state, because seal between each part, gaseous big inner chamber department of getting back to the pump body inside from the external world keeps the same with external atmospheric pressure value, when pressing the duckbill once more, as shown in figure 2, gaseous through the through-hole of the pump body of getting back to inside the big circle complex bottle from the external world, keeps external and the bottle inside atmospheric pressure value the same.

The lightweight antistatic material is prepared from the following raw materials in parts by weight: 80-200 parts of polybutylene succinate, 60-80 parts of modified material polylactic acid, 30-50 parts of PHBH, 10-20 parts of modified corn starch, 8-10 parts of titanium dioxide, 5-20 parts of plasticizer, 4-10 parts of nano graphene, 5-8 parts of coupling agent, 2-6 parts of degradation agent, 1-5 parts of antioxidant, 1-5 parts of antistatic agent, 1-5 parts of lubricant and 1-5 parts of filler; the raw materials in parts by weight are prepared by mixing polybutylene succinate, modified material polylactic acid, PHBH, modified corn starch and titanium dioxide, and then putting the mixture into a drying oven to be dried to obtain a dried material; the drying temperature is 40-60 ℃, and the drying time is 2-4 h; then putting the dried material into a high-speed mixer, and sequentially putting a plasticizer, the nano graphene, a coupling agent, a degrading agent, an oxidizing agent, an antistatic agent, a lubricant and a filler, and mixing the raw materials in the high-speed mixer for 20-30 min; finally, adding the mixture in the high-speed mixer into a double-screw extruder, and extruding and granulating to obtain the biomass degradable material; the first zone extrusion temperature of the double-screw extruder is 90-100 ℃, the second zone extrusion temperature is 110-120 ℃, and the third zone extrusion temperature is 120-130 ℃; the plasticizer is propylene glycol, the coupling agent is a silane coupling agent KH-560, the degrading agent is polyhydroxyalkanoate and modified cyclodextrin, and the weight ratio of the degrading agent to the plasticizer is 2: 1, the antioxidant is formed by mixing BHA and PG in any ratio, the lubricant is formed by mixing glycerol tristearate and soybean oil in any ratio, the filler is calcium carbonate master batch, and the antistatic agent is HDC-102 antistatic agent or HBS-510 antistatic agent.

In summary, the foam pump eliminates the two-way valve of the same type, and realizes the functions of sealing and opening the cavity in the pump body by using the large piston which jumps to be matched with the connecting seat and the valve rod seal, namely, the sealing surface at the large piston is matched and sealed with the sealing surface at the connecting seat when in a pressing state; and in the rebound state, the sealing rib at the large piston is matched and sealed with the sealing surface at the valve rod. Meanwhile, the common glass ball is omitted, the elastic sleeve is matched with the pump body for sealing to realize the function, namely the elastic sleeve is fastened and fixed at the elastic sleeve groove of the pump body, and the bottom plane of the elastic sleeve is matched and sealed with the elastic sleeve groove plane of the pump body. One end of the spring is arranged in a spring groove of the spring pad, the other end of the spring is sleeved on the outer wall of the valve rod, the spring is not in liquid contact with the wall of the thin inner cavity of the pump body, and the spring is prevented from rusting and polluting liquid due to the contact of the spring and the liquid. The outer edge of the rod part of the small piston which jumps in the valve rod is positioned in the inner wall of the valve rod for matching and sealing, so that liquid in the valve rod is prevented from flowing back to influence the appearance and the function; the sealing rib at the bottom of the small piston is matched and sealed with the inner wall of the pump body, so that liquid leakage is prevented, and the appearance and the function are prevented from being influenced.

Claims

1. A lightweight antistatic foam pump is characterized in that the inner ring diameter outer diameter of a large ring (9) of the foam pump is sleeved in the pump opening inner diameter of a pump body (2), meanwhile, the pump opening outer diameter of the pump body is sleeved with the inner ring diameter matching rib position of the large ring, a piston, a valve rod (8), a valve needle (7), a spring (6) and an elastic sleeve (3) are arranged in the pump body, the elastic sleeve is arranged at a water inlet in the pump body, an elastic sheet in the middle of the elastic sleeve abuts against a convex rib of an orifice of the water inlet in the pump body, and the valve rod extending out of the pump body is connected with a duckbill (16); the pump is characterized in that a piston in the pump body (2) comprises a large piston (10) and a small piston (4), a valve needle (7) is sleeved into a through hole in the valve rod from one end of the valve rod (8), the valve needle in the valve rod is fixedly connected with one end of the small piston sleeved at the other end of the valve rod in a buckling manner, a spring pad (5) is sleeved on the outer diameter of the valve rod at the buckling and fixing connection position of the rod part of the small piston and the valve needle, a raised ring rib (801) is arranged on the outer diameter of the sleeved end of the valve needle of the valve rod, one end of a spring (6) is abutted against the ring rib; the outer diameter of the small piston is abutted and sealed with the wall of the thin inner cavity above the elastic sleeve (3) of the pump body, the outer diameter of the large piston is abutted and sealed with the wall of the large inner cavity above the thin inner cavity in the pump body, a connecting seat (12) is arranged at the inner diameter of the inner ring of the large ring (9) at the pump opening of the pump body above the large piston, a duckbill (16) is connected with the valve rod through the connecting seat, and a through hole (201) is arranged at one side of the pump body above the large piston at the sleeving part of the large ring inner pump body and the large ring; an air gap channel is arranged between the connecting seat and the large piston, a vent groove is arranged on the outer diameter of the leaf ring (1001) of the large piston, and an air gap channel is arranged between the large piston and the valve rod; the large ring is a light anti-static large ring, and the pump body is a light anti-static pump body.

2. The lightweight antistatic foam pump of claim 1, characterized in that the small piston (4) is a special-shaped small piston, the small piston is T-shaped, and a corresponding T-shaped hole is arranged in the small piston; the large piston (10) is a special-shaped large piston, an inner rib platform which is upwards stepped and protrudes layer by layer is arranged on the outer diameter of a piston leaf ring (1001) of the large piston, the inner rib platform of the large piston is higher than a top ring opening of the piston leaf ring, and the inner rib platform of the large piston is sleeved into the inner diameter of the connecting seat (12).

3. The lightweight antistatic foam pump according to claim 2, characterized in that the inner diameter of the connecting seat (12) is shaped to correspond to the upper portion of the inner rib platform of the large piston (10), and a gap is provided between the outer diameter of the connecting seat and the inner diameter of the inner ring of the large ring (9); a raised upper inner ring is arranged above the inner ring diameter of the large ring, and the outer diameter of the bottom ring opening of the duckbill (16) is spaced from the inner diameter of the upper inner ring of the large ring; an upward convex transition cavity is arranged between the thin inner cavity and the large inner cavity of the pump body (2), and the shape of the transition cavity of the pump body corresponds to the lower part of the inner rib platform of the large piston.

4. The foam pump of claim 1, characterized in that the top of the ring rib (801) of the valve rod (8) and the bottom of the leaf ring (1001) of the large piston (10) are sealed and pressed against each other by a spring (6) with the outer diameter of the valve rod.

5. The lightweight antistatic foam pump of claim 1, characterized in that while the pintle head (701) of the valve needle (7) is fastened with the inner fastening ring of the rod orifice of the small piston (4), the valve needle is provided with a fine gap through the first step ring (702) of the outer diameter and the step surface of the inner wall of the valve rod (8) at the step ring, the outer diameter of the small piston at the pintle head is provided with a tapered ring opening which opens upwards and outwards, the ring opening of the small piston is sealed against the inner wall of the valve rod, the second step ring at the tail end (703) of the valve needle is sleeved with the inner diameter of the upper orifice of the valve rod, and the outer diameter of the upper orifice of the valve rod is sleeved with the inner hole of the connecting seat (12).

6. The lightweight antistatic foam pump of claim 5, characterized in that the tail end (703) of the valve needle (7) is provided with a T-shaped inner cavity groove, the inner diameter of the upper orifice of the valve rod (8) is provided with an inner ring groove, the bottom of the inner ring groove of the valve rod is provided with a downward extending sunken groove, the second step ring inclined plane of the outer diameter of the tail end of the valve needle is sleeved on the sunken groove opening of the inner ring groove of the valve rod, and a fine gap is arranged between the outer diameter of the tail end of the valve needle and the inner wall of the inner ring groove of the valve rod.

7. The lightweight antistatic foam pump of claim 1, characterized in that the inner wall of the thin inner cavity of the pump body (2) at the spring pad (5) is provided with a limit step (202), and the spring pad (5) is limited at the limit step in the pump body.

8. The lightweight antistatic foam pump of claim 1, characterized in that a filter plug (14) is arranged in the duckbill (16), and a first wire mesh (13) and a second wire mesh (15) are respectively arranged at the openings of the two ends of the filter plug.