CN114940307A - All-plastic pistol pump capable of being used in upright and inverted state - Google Patents

Abstract

The invention discloses a positive and negative all-plastic pistol pump, which comprises a pump body, wherein a shell is sleeved on the pump body, a liquid spraying channel and a hydraulic channel which are communicated with each other are arranged in the pump body, a liquid guiding cavity is arranged in the pump body, a piston is arranged in the liquid guiding cavity, a valve cavity communicated with the liquid guiding cavity and the hydraulic channel is also arranged on the pump body, an elastic valve core is arranged in the valve cavity, the elastic valve core comprises an upper elastic tube and a lower elastic tube, a valve core check sheet is movably arranged between the upper elastic tube and the lower elastic tube up and down, and a reverse spraying device for realizing the positive spraying and reverse spraying functions of the pistol pump is inserted in one side of the elastic valve core facing a liquid container. Because the upright liquid inlet channel and the inverted liquid inlet channel are integrated in the inverted spraying device, the liquid in the liquid container can be sprayed in the upright state and the inverted state of the pistol pump, the internal structure is simplified, and the problems of complicated structure, difficult manufacturing and assembling, high cost and the like of the upright pistol pump and the inverted pistol pump are effectively solved.

Description

All-plastic pistol pump capable of being positively and reversely arranged

Technical Field

The invention relates to the technical field of pistol pumps, in particular to a positive and negative all-plastic pistol pump.

Background

The pistol pump is a spray pump fixed on a container, and the pistol pump is a device which sucks liquid in a bottle into a pump body according to a preset number of times by buckling a trigger and sprays the liquid according to a preset shape in use, and is widely applied in the medical and daily chemical industries. The conventional pistol pump can spray the liquid in the bottle only by pressing the trigger in a state that the container is held upright and forward, that is, in a state that the pistol pump is upright, and if the container is held upside down, that is, in a state that the pistol pump is inverted, the liquid in the bottle cannot be sprayed to the outside even if the trigger is pressed.

In order to spray in both the upright state and the inverted state of the pistol pump, the existing upright and inverted pistol pump generally arranges two different liquid inlet channels, namely an upright liquid inlet channel and an inverted liquid inlet channel, in different upright spray components and inverted spray components respectively so as to spray the liquid in a liquid container in the upright state and the inverted state. The positive and negative pistol pump has the disadvantages of complex structure, difficult manufacture and assembly and high cost.

The present invention has been made based on such a situation.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a plastic pistol pump with a simple structure, easy assembly, low cost, and capability of spraying liquid in a container both in a right position and in an upside down position.

The technical scheme adopted by the invention for solving the technical problem is as follows:

the positive-negative all-plastic pistol pump comprises a pump body, wherein a shell is sleeved on the pump body, a liquid spraying channel and a liquid pressing channel which are communicated with each other are arranged inside the pump body, a liquid guiding cavity is arranged in the pump body, a piston is arranged in the liquid guiding cavity, a valve cavity communicated with the liquid guiding cavity and the liquid pressing channel is further arranged on the pump body, an elastic valve core is arranged in the valve cavity and comprises an upper elastic tube and a lower elastic tube, a valve core check piece is movably arranged between the upper elastic tube and the lower elastic tube up and down, a reverse spraying device for realizing the positive spraying and reverse spraying functions of the pistol pump is inserted into one side of the elastic valve core facing a liquid container, a trigger assembly capable of driving the piston to move is further hinged on the pump body, and an air inlet for enabling external air to enter the liquid container is further arranged on the pump body.

Preferably, the reverse spraying device comprises a universal valve seat clamped with the elastic valve core, a positive liquid inlet channel is arranged at the bottom side of the universal valve base, and a liquid inlet hole communicated with the positive liquid inlet channel is further formed in the universal valve base; an inverted liquid inlet channel and a one-way spray valve are arranged on the side surface of the universal valve seat, and the one-way spray valve is used for controlling the connection and disconnection between the inverted liquid inlet channel and the liquid inlet hole; the universal valve seat is internally provided with the lower elastic tube inner cavity and a liquid inlet cavity communicated with the liquid inlet hole, liquid in the liquid container can enter the liquid inlet cavity from the positive liquid inlet channel through the liquid inlet hole, and the liquid in the liquid inlet cavity can enter the upper elastic tube inner cavity through the lower elastic tube inner cavity via the valve core check sheet.

Preferably, the one-way spout valve comprises a pump ball movably arranged in the universal valve seat; in the state that the pistol pump is arranged in the right direction, the pump bead blocks the communication between the inverted liquid inlet channel and the liquid inlet hole, and the liquid in the liquid container can only enter the liquid inlet cavity through the liquid inlet through the right liquid inlet channel; under the state is invertd to the pistol pump, inversion inlet channel and feed liquor hole intercommunication, the liquid in the liquid container can be via inversion inlet channel passes through the inlet gets into the feed liquor chamber.

Preferably, the valve cavity is annularly provided from inside to outside to form a valve core insertion cavity, a valve seat sealing clamping inner cavity and a valve seat sealing clamping outer cavity, the valve core insertion cavity is communicated with the liquid guiding cavity, and the valve seat sealing clamping outer cavity is communicated with the air inlet; the inverted spraying device is provided with an inner side inserting ring wall and an outer side inserting ring wall which are respectively inserted into the valve seat sealing clamping inner cavity and the valve seat sealing clamping outer cavity.

Preferably, the outer wall of the upper elastic pipe is elastically and hermetically connected with the inner wall of the valve core insertion cavity, and the elastic valve core is arranged in a cavity formed by the inner insertion annular wall of the inverted spraying device and can perform elastic deformation movement up and down.

Preferably, the reverse spraying device is provided with a scavenging port communicated with the valve seat sealing clamping outer cavity, and the air inlet, the valve seat sealing clamping outer cavity and the scavenging port form an air passage together.

Preferably, one side of the back-spraying device, provided with the ventilation port, surrounds the back-spraying device with a ventilation one-way valve plate, and a valve plate cavity formed by the ventilation one-way valve plate is communicated with the gas channel.

Preferably, the trigger assembly comprises a trigger handle, a pair of connecting holes are formed in the trigger handle, the piston is provided with a connecting column capable of being inserted into the pair of connecting holes, the upper end of the trigger handle is connected with a pair of reset arc-shaped rods capable of driving the trigger handle to reset, and the pump body is provided with a pair of fixing columns for fixing the pair of reset arc-shaped rods.

Preferably, the lower end of the pump body is connected with a bottle locking cap used for being connected with a liquid container, and a sealing ring is arranged between the bottle locking cap and the pump body.

Preferably, the pump body is inserted with a nozzle, the nozzle is communicated with the liquid spraying channel, and the front end of the nozzle is provided with a detachable spray head.

Preferably, the pistol pump is made entirely of plastic material.

Compared with the prior art, the invention has the beneficial effects that: because the positive liquid inlet channel and the negative liquid inlet channel are integrated in the reverse spraying device, the liquid inside the liquid container can be sprayed under the positive state and the negative state of the pistol pump, the internal structure is simplified, and the problems of complex structure, difficult manufacturing and assembly, high cost and the like of the positive and negative pistol pump are effectively solved; in addition, all parts of the pistol pump are made of plastic materials, so that the pistol pump can be recycled without disassembly and separation, the recycling difficulty and the recycling cost are reduced, and the pistol is environment-friendly and energy-saving.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is a schematic view of the overall structure of another embodiment of the present invention;

FIG. 4 is a cross-sectional view of another embodiment of the present invention;

FIG. 5 is an exploded view of the present invention;

FIG. 6 is a schematic view of the pump body of the present invention;

FIG. 7 is a sectional view taken along line B-B of FIG. 2;

fig. 8 is a schematic view of the present invention with the resilient valve cartridge coupled to the cartridge check and reverse flow device with the pistol pump in the upright position;

FIG. 9 is a cross-sectional view taken along line C-C of FIG. 8;

fig. 10 is a schematic view of the present invention with the resilient valve cartridge attached to the cartridge check and reverse flow device when the pistol pump is inverted;

FIG. 11 is a cross-sectional view taken along line D-D of FIG. 10;

fig. 12 is a cross-sectional view of the present invention with the pistol pump inverted;

fig. 13 is a schematic illustration of a positive spray configuration of the present invention with the pistol pump positive;

fig. 14 is a schematic view of the reverse spray configuration of the present invention with the pistol pump inverted;

fig. 15 is a sectional view taken along the direction E-E in fig. 14.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

Referring to fig. 1 to 4, the invention provides a right-side-up and upside-down all-plastic pistol pump, which comprises a pump body 1, the gun pump is characterized in that a shell 2 is sleeved on a pump body 1, a liquid spraying channel 11 and a liquid pressing channel 12 which are communicated with each other are arranged inside the pump body 1, a liquid guiding cavity 11 is arranged inside the pump body 1, a piston 14 is arranged inside the liquid guiding cavity 11, a valve cavity 15 communicated with the liquid guiding cavity 11 and the liquid pressing channel 12 is further arranged on the pump body 1, an elastic valve core 16 is arranged inside the valve cavity 15, the elastic valve core 16 comprises an upper elastic tube 161 and a lower elastic tube 162, a valve core check sheet 163 is movably arranged between the upper elastic tube 161 and the lower elastic tube 162 up and down, a reverse spraying device 3 for realizing the forward spraying and reverse spraying functions of the gun pump is inserted into one side of the elastic valve core 16 facing a liquid container, a trigger assembly 4 capable of driving the piston 14 to move is further hinged on the pump body 1, and an air inlet 17 for enabling outside air to enter the liquid container is further arranged on the pump body 1.

As shown in fig. 7 to 11, the back spray device 3 includes a universal valve seat 31 clamped with the elastic valve core 16, a positive liquid inlet channel 331 is disposed on the bottom side of the universal valve base 33, and the universal valve base 33 is further provided with a liquid inlet hole 34 communicated with the positive liquid inlet channel 331; the side surface of the universal valve seat 31 is provided with an inverted liquid inlet channel 36 and a one-way spray valve, and the one-way spray valve is used for controlling the on-off between the inverted liquid inlet channel 36 and the liquid inlet hole 34; the universal valve seat 31 is further provided with a liquid inlet cavity 35 communicating the inner cavity of the lower elastic tube 162 and the liquid inlet hole 34, liquid in the liquid container can enter the liquid inlet cavity 35 through the liquid inlet hole 34 from the upright liquid inlet channel 331, and liquid in the liquid inlet cavity 35 can enter the inner cavity of the upper elastic tube 161 through the inner cavity of the lower elastic tube 162 and the valve core check sheet 163.

The one-way inverted spray valve comprises a pump bead 32 movably arranged in a universal valve seat 31; in the positive state of the pistol pump, the pump bead 32 blocks the upper end port of the universal valve seat 31 under the action of gravity to block the communication between the inverted liquid inlet channel 36 and the liquid inlet hole 34, and the liquid in the liquid container can only enter the liquid inlet cavity 35 through the liquid inlet 34 via the positive liquid inlet channel 331; in the inverted state of the pistol pump, the pump bead 32 leaves the upper end port of the universal valve seat 31 under the action of gravity, the inverted liquid inlet channel 36 is communicated with the liquid inlet hole 34, and liquid in a liquid container can enter the liquid inlet cavity 35 through the liquid inlet 34 via the inverted liquid inlet channel 36.

As shown in fig. 2, 4 and 6, the valve cavity 15 is annularly provided from inside to outside to form a valve plug insertion cavity 151, a valve seat sealing and clamping inner cavity 152 and a valve seat sealing and clamping outer cavity 153, the valve plug insertion cavity 151 is communicated with the liquid guiding cavity 11, and the valve seat sealing and clamping outer cavity 153 is communicated with the air inlet 17; the reverse spraying device 3 is provided with an inner inserting annular wall 37 and an outer inserting annular wall 38 which are respectively inserted into the valve seat sealing clamping inner cavity 152 and the valve seat sealing clamping outer cavity 153. A mutual clamping and sealing structure is formed between the inverted spraying device 3 and the valve cavity 15, so that the installation is convenient, and the sealing performance after clamping can be ensured.

As shown in fig. 2 and 4, the outer wall of the upper elastic tube 161 is elastically and sealingly connected with the inner wall of the valve core insertion cavity 151, the elastic valve core 16 is disposed inside the cavity formed by the inner insertion annular wall 37 of the back-spray device 3 and can elastically deform up and down, and the space formed by the inner wall of the valve core insertion cavity 151 and the outer wall of the upper elastic tube 161 in the valve cavity 15 is a liquid outlet space a.

As shown in fig. 2, 4 and 7, the back spray device 3 is provided with a ventilation port 39 communicated with the valve seat sealing clamping outer cavity 153, the air inlet 17, the valve seat sealing clamping outer cavity 153 and the ventilation port 39 together form an air passage, the air passage is communicated with the inside of the liquid container through the ventilation port 39, and external air can enter the inside of the liquid container through the air passage. The gas channel is arranged to enable the external atmosphere to form gas inlet or gas return with the inside of the liquid container during use, so that the gas pressure inside the liquid container is increased or reduced, and an isobaric state is formed with the outside, and therefore the liquid suction and injection are guaranteed.

As shown in fig. 7 to 11, the side of the back spray device 3 provided with the scavenging port 39 is hermetically sleeved with the scavenging check valve sheet 5 around the back spray device 3, and a valve sheet cavity 51 formed by the scavenging check valve sheet 5 is communicated with the gas channel.

As shown in fig. 5, the trigger assembly 4 includes a trigger handle 41 having a pair of connecting holes, the piston 14 has a connecting post insertable into the pair of connecting holes, a pair of restoring arc rods 42 connected to an upper end of the trigger handle for restoring the trigger handle, and the pump body 1 has a pair of fixing posts 18 for fixing the pair of restoring arc rods 42. Elastic deformation can take place for the arc pole 42 that resets when the user presses trigger handle 41, and the arc pole 42 that resets can resume from the elastic deformation state after loosening trigger handle 41 to make trigger handle 41 reset, make the operation more simple and convenient laborsaving, need not the manual trigger handle 41 of breaking off with the fingers and thumb that makes a round trip, only through continuous extrusion and loosen trigger handle 41 just can the liquid in the persistence blowout liquid container.

The lower end of the pump body 1 is connected with a lock bottle cap 6 used for being connected with a liquid container, a sealing ring 61 is arranged between the lock bottle cap 6 and the pump body 1, so that the liquid in the liquid container can be sealed, and the liquid is prevented from leaking.

The pump body 1 is inserted with a nozzle 7, the nozzle 7 is communicated with the liquid spraying channel 11, the front end of the nozzle 7 is provided with a detachable spray head 8, in the embodiment, the spray head 8 is a foaming spray head, liquid sprayed out through the foaming spray head can be in a foam shape, foam spraying can be achieved, in practical application, the spray head 8 can be set as a spray head to achieve spray spraying, and due to the fact that the spray head 8 can be detached, spraying or foam spraying can be achieved by replacing the spray head 8.

In this embodiment, the pistol pump is entirely made of plastic material, so that the problem of corrosivity caused by metal components such as metal springs is avoided, and meanwhile, the recovery pistol pump does not need to be disassembled first, so that the recovery efficiency is very high.

As shown in fig. 1 to 4, in the present embodiment, the pump body 1 is detachably mounted in the housing 2, and is independent from the housing 2, and the independent design of the pump body 1 can realize matching with different types of housings 2.

As shown in fig. 2, 4 and 12, the positive inlet path 331 is provided with a suction pipe 9 inserted into the liquid container. When the pistol pump is used for the first time, the trigger component 4 drives the piston 14 to move outwards, at this time, the volume of the liquid guiding cavity 11 is enlarged, negative pressure is generated and acts on the valve core check sheet 163, the valve core check sheet 163 moves upwards, the valve core check sheet 163 is opened, the liquid inlet cavity 35 is communicated with the liquid outlet space A, and under the state that the pistol pump is positively arranged, liquid in the liquid container can pass through the suction pipe 9 and the positively arranged liquid inlet channel 331, enters the liquid outlet space A through the liquid inlet cavity 35 and then reaches the liquid guiding cavity 11; in the state of the pistol pump being inverted, the liquid in the liquid container will enter the liquid inlet cavity 35 from the inverted liquid inlet channel 36 through the liquid inlet 34, then enter the liquid outlet space a from the liquid inlet cavity 35, and finally reach the liquid guide cavity 11.

As shown in fig. 2, 4 and 13, the fluid reservoir and the pistol pump are in upright positions when the pistol pump is in the upright position, and the pump bead 32 blocks communication between the inverted fluid inlet channel 36 and the fluid inlet aperture 34 when the pistol pump is in the upright position. When the trigger assembly 4 is pulled, the trigger assembly 4 pushes the piston 14, so as to squeeze the liquid in the liquid guiding chamber 11, the liquid enters the liquid outlet space a from the liquid guiding chamber 11, the elastic valve core 16 is pushed to deform and move downwards, so that the liquid outlet space a is communicated with the hydraulic channel 12, and the liquid is finally sprayed out through the nozzle 7 through the hydraulic channel 12 and the liquid spraying channel 11. At this time, since the liquid is ejected, the pressure generated in the liquid container becomes small, and the external air enters the air inlet 17, then enters the valve plate cavity 51 of the ventilation check valve plate 5 through the air passage, and then enters the liquid container through the ventilation check valve plate 5, so that the air pressure in the liquid container is consistent with the external atmospheric pressure, thereby facilitating the use of a pistol pump to pump the liquid in the liquid container. After the trigger assembly 4 is loosened, the trigger handle 41 is reset under the action of the reset arc-shaped rod 42, liquid in the liquid container enters the liquid outlet space A and the liquid guide cavity 11 through the suction pipe 9 and the positive liquid inlet channel 331 and the liquid inlet cavity 35 to finish the liquid feeding for a new time, and the continuous spraying is realized by repeating the steps.

As shown in fig. 12, 14 and 15, when the pistol pump is used in the upside down state, the liquid container and the pistol pump are in the upside down position, the pump bead 32 is separated from the upper end port of the universal valve seat 31 under the gravity, and the upside down liquid inlet channel 36 is communicated with the liquid inlet hole 34. When the trigger assembly 4 is pulled, the trigger assembly 4 pushes the piston 14 to squeeze the liquid in the liquid guiding chamber 11, the liquid enters the liquid outlet space a from the liquid guiding chamber 11, the elastic valve core 16 is pushed to deform and move in the direction away from the liquid guiding chamber 11, so that the liquid outlet space a is communicated with the hydraulic channel 12, and the liquid is finally sprayed out through the nozzle 7 through the hydraulic channel 12 and the liquid spraying channel 11. At this time, as the liquid is sprayed out, the pressure generated in the liquid container is reduced, and the outside air enters the air inlet 17, then enters the valve plate cavity 51 of the ventilation check valve plate 5 through the air passage, and then enters the liquid container through the ventilation check valve plate 5, so that the air pressure in the liquid container is consistent with the outside atmospheric pressure. After the trigger assembly 4 is loosened, the trigger handle 41 is reset under the action of the reset arc-shaped rod 42, the liquid in the liquid container is sucked into the liquid inlet cavity 35 from the inverted liquid inlet channel 36 through the liquid inlet 34 and then enters the liquid outlet space A and the liquid guide cavity 11, the liquid feeding for the new time is completed, and the continuous spraying is realized by repeating the steps.

The invention integrates the positive liquid inlet channel 331 and the inverted liquid inlet channel 36 into the inverted spray device 3, can realize the liquid spray in the container under the positive state and the inverted state of the pistol pump, effectively simplifies the internal structure, ensures that the spray volume under the positive state and the inverted state is more stable, and effectively solves the problems of complex structure, difficult manufacturing and assembling, high cost and the like of the positive inverted pistol pump.

The above is only a preferred embodiment of the present invention, and the technical solutions that achieve the objects of the present invention by basically the same means are all within the protection scope of the present invention.

Claims (11)

1. The positive-inverted all-plastic pistol pump is characterized by comprising a pump body (1), wherein a shell (2) is sleeved on the pump body (1), a liquid spraying channel (11) and a liquid pressing channel (12) which are communicated with each other are arranged inside the pump body (1), a liquid guiding cavity (13) is arranged in the pump body (1), a piston (14) is arranged in the liquid guiding cavity (13), a valve cavity (15) communicated with the liquid guiding cavity (13) and the liquid pressing channel (12) is further arranged on the pump body (1), an elastic valve core (16) is arranged in the valve cavity (15), the elastic valve core (16) comprises an upper elastic tube (161) and a lower elastic tube (162), a valve core check piece (163) is movably arranged between the upper elastic tube (161) and the lower elastic tube (162) up and down, and one side, facing a liquid container, of the elastic valve core (16) is inserted and connected with a pump body for realizing positive spraying, positive-inverted all-plastic pistol, The inverted spraying device (3) with the inverted spraying function is characterized in that a trigger component (4) capable of driving a piston (14) to move is hinged to the pump body (1), and an air inlet (17) for enabling external air to enter a liquid container is further formed in the pump body (1).

2. The all-plastic right-upside-down pistol pump according to claim 1, characterized in that the reverse-spraying device (3) comprises a universal valve seat (31) clamped with the elastic valve core (16), a positive liquid inlet channel (331) is arranged on the bottom side of the universal valve base (33), and a liquid inlet hole (34) communicated with the positive liquid inlet channel (331) is further arranged on the universal valve base (33); an inverted liquid inlet channel (36) and a one-way spray valve are arranged on the side surface of the universal valve seat (31), and the one-way spray valve is used for controlling the connection and disconnection between the inverted liquid inlet channel (36) and the liquid inlet hole (34); the universal valve seat (31) in still be provided with down elasticity pipe (162) inner chamber and feed liquor chamber (35) that feed liquor hole (34) are linked together, liquid in the liquid container can certainly just put feed liquor passageway (331) and get into feed liquor chamber (35) through feed liquor hole (34), the liquid in feed liquor chamber (35) can be through down elasticity pipe (162) inner chamber via case check sheet (163) gets into go up elasticity pipe (161) inner chamber.

3. -a full plastic right-side-up and upside-down pistol pump according to claim 2, characterized in that the one-way blow-down valve comprises a pump bead (32) movably arranged inside the universal valve seat (31); in the positive state of a pistol pump, the pump bead (32) blocks the communication between the inverted liquid inlet channel (36) and the liquid inlet hole (34), and liquid in a liquid container can only enter the liquid inlet cavity (35) through the liquid inlet (34) via the positive liquid inlet channel (331); under the pistol pump state of inversion, inversion inlet channel (36) and feed liquor hole (34) intercommunication, the liquid in the liquid container can be via inversion inlet channel (36) pass through inlet (34) get into feed liquor chamber (35).

4. The right-handed and upside-down all-plastic pistol pump according to claim 1, characterized in that the valve chamber (15) is annularly provided from inside to outside to form a valve core plug-in chamber (151), a valve seat seal clamping inner chamber (152) and a valve seat seal clamping outer chamber (153), the valve core plug-in chamber (151) is communicated with the liquid leading chamber (13), and the valve seat seal clamping outer chamber (153) is communicated with the air inlet (17); the inverted spraying device (3) is provided with an inner side inserting ring wall (37) and an outer side inserting ring wall (38) which are respectively inserted into the valve seat sealing clamping inner cavity (152) and the valve seat sealing clamping outer cavity (153).

5. A full plastic pistol pump in right inverted and left opened according to claims 1 and 4 characterized in that the outer wall of the upper elastic tube (161) is elastically sealed with the inner wall of the valve core plug-in cavity (151), the elastic valve core (16) is arranged in the cavity formed by the inner plug-in annular wall (37) of the inverted spray device (3) and can do elastic deformation movement up and down.

6. Full plastic pistol pump according to claims 1 and 4, characterized in that the reverse-flow device (3) is provided with a venting opening (39) which communicates with the external seat-seal-latch chamber (153), the air inlet (17), the external seat-seal-latch chamber (153) and the venting opening (39) together forming an air passage.

7. A plastic pistol pump according to claim 6, characterized in that the side of the reverse-flow device (3) provided with the ventilation opening (39) is hermetically sleeved with a ventilation check valve plate (5) around the reverse-flow device (3), and the valve plate cavity (51) formed by the ventilation check valve plate (5) is communicated with the air channel.

8. A pump of all-plastic right-handed and upside-down pistol according to claim 1, characterized in that the trigger assembly (4) comprises a trigger handle (41) having a pair of connecting holes, the piston (14) having a connecting post insertable into the pair of connecting holes, a pair of restoring arc rods (42) connected to the upper end of the trigger handle for restoring the trigger handle, and the pump body (1) having a pair of fixing posts (18) for fixing the pair of restoring arc rods (42).

9. The all-plastic right-handed and upside-down pistol pump according to claim 1, characterized in that a locking bottle cap (6) for connecting with a liquid container is connected to the lower end of the pump body (1), and a sealing ring (61) is arranged between the locking bottle cap (6) and the pump body (1).

10. Full plastic pistol pump upside down according to claim 1, characterized in that a nozzle (7) is plugged into the pump body (1), said nozzle (7) being in communication with the spray channel (11), the front end of said nozzle (7) being provided with a detachable spray head (8).

11. A plastic pistol pump according to claims 1-10, characterised in that the pistol pump is entirely made of plastic material.

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