Continuous spraying type hand-buckled spray gun

Abstract

The utility model relates to a continuous spraying type hand-operated spray gun, which is designed for solving the technical problem that the existing similar products realize continuous spraying through the pressurization space change of a water outlet cavity in a sprayer main body and the pressurization structure design. The hand-buckled spray gun is characterized in that a pressurizing structure is arranged in a water outlet cavity of a main body of the hand-buckled spray gun, the pressurizing structure comprises a pressurizing pipe, a pressurizing spring and a pressurizing piston, and the pressurizing pipe, the pressurizing spring and the pressurizing piston are fixed in the water outlet cavity of the main body through a spray piece seat on the outer diameter of an orifice of the water outlet cavity; the pressurizing spring is arranged in a pressurizing cavity formed between the pressurizing pipe and the pressurizing piston, the two ends of the pressurizing spring abut against the pressurizing piston in the pressurizing cavity and the pressurizing pipe respectively, and a protruding inner sleeve hole at the bottom in the pressurizing pipe in the main body is sleeved with a sleeve head at a ventilation hole in a water outlet cavity of the main body. And a gap channel communicated with the outer diameter of the pressurizing piston extending out of one end of the pressurizing pipe and the inner diameter of the spraying piece seat is arranged between the outer diameter of the pressurizing pipe in the water outlet cavity of the main body and the inner wall of the water outlet cavity of the main body.

Description

Technical Field

[0001] The utility model relates to a micro spray gun, which is a continuous spray type hand-button spray gun. Background Art

[0002] Micro spray gun, or micro hand trigger sprayer, micro hand trigger spray gun, this kind of product drives the piston to reciprocate in the pump body by reciprocatingly pressing the wrench, so that the gas in the pump body flows, the pressure becomes smaller, and the pressure outside the pump body remains unchanged, and a pressure difference is generated inside and outside the pump body. The liquid is diverted out of the pump body through the pressure difference, and the liquid is instantly atomized when it encounters the high-speed airflow. Some existing products of this kind are provided with a water outlet sealing structure in the water outlet channel of the pump body to provide an atomization effect when the water is discharged, such as the application publication number CN112960267A disclosed in the Chinese patent literature, the application publication date is 2021.06.15, and the invention name is "a kind of all-plastic hand trigger sprayer"; generally, this kind of sprayer needs to press the wrench once to realize a spray, and cannot realize continuous and uninterrupted spray. For this reason, other products of this kind have a continuous spray function, such as the authorization announcement number CN216910667U disclosed in the Chinese patent literature, the authorization announcement date is 2022.07.08, and the utility model name is "a sprayer with continuous spray function". However, the continuous spray structure of the above-mentioned similar sprayers is difficult to apply to hand-triggered spray guns. Continuous spraying is rarely achieved through the pressurization space change and pressurization structure design of the water outlet chamber in the sprayer body. The pressurization structure is rarely set in the water outlet chamber of the body. Summary of the invention

[0003] In order to overcome the above shortcomings, the purpose of the utility model is to provide a continuous spraying hand trigger spray gun in the art, which mainly solves the technical problems of existing similar products that the continuous spraying is rarely achieved through the change of the pressurization space of the water outlet chamber in the sprayer body and the design of the pressurization structure, and the pressurization structure is rarely set in the water outlet chamber of the body. The purpose is achieved through the following technical solutions.

[0004] A continuous spraying hand trigger spray gun, the water inlet hole, piston cavity and water outlet cavity in the main body of the hand trigger spray gun are connected, the cavity mouth of the water outlet cavity of the main body is provided with a spray plate seat, the spray hole inside or outside the spray plate seat is provided with a spray plate, the outer diameter of the main body is provided with an outer cover, one end of the wrench is buckled and fixed to the outer diameter convex column of the water outlet cavity of the main body, the inner side of the wrench is buckled and buckled with one end of the working piston extending from the piston cavity in the main body, and a piston spring is provided in the piston cavity of the main body; a suction pipe is provided at the water inlet hole at the bottom of the main body, a spiral ring is provided at the outer diameter of the main body at the water inlet hole, and a main body seat at the top of the spiral ring A gasket is provided at the mouth; a through hole is provided at one end of the piston cavity of the main body, which is connected to the water inlet hole of the main body; a ball valve is provided at the water inlet hole in the main body below the through hole, and a boost check valve is provided at the water inlet hole in the main body above the through hole, which is installed from the top of the main body and fixed to the main body; a conical protrusion at one end of the boost check valve is limited by the inner wall of the water inlet hole in the main body above the ball valve, and one side of the sleeve body at the other end of the boost check valve is interference-sealed with the orifice at the installation point on the top of the main body, and a ventilation channel integrating an exhaust channel and a return air channel is provided on the other side of the sleeve body of the boost check valve. The key point of its structural design is that a boosting structure is provided in the water outlet chamber of the main body, and the boosting structure includes a boosting pipe, a boosting spring and a boosting piston. The boosting spring is a metal spring. The boosting pipe, the boosting spring and the boosting piston are fixed in the water outlet chamber of the main body through a spray plate seat with an outer diameter at the orifice of the water outlet chamber. The boosting spring is arranged in the boosting chamber formed between the boosting pipe and the boosting piston. The two ends of the boosting spring are respectively against the boosting piston and the boosting pipe in the boosting chamber. The inner sleeve hole raised at the bottom of the boosting pipe in the main body is fitted with the sleeve at the ventilation hole in the water outlet chamber of the main body. A gap is provided between the outer diameter of the boosting pipe in the water outlet chamber of the main body and the inner wall of the water outlet chamber of the main body, which is equal to the outer diameter of the boosting piston extending out of one end of the boosting pipe and the inner diameter of the spray plate seat. The gap channel is connected with the transition hole between the water outlet cavity and the water inlet hole in the main body at the boosting check valve in the main body, and an exhaust channel is provided between the water inlet hole in the main body and the outer diameter of the boosting check valve at the ventilation hole above the transition hole; when the boosting piston moves to the right, the exhaust channel is connected to the main body through the small hole on the top of the boosting check valve; when the boosting piston is reset to the left, the exhaust channel is transformed into a return air channel, and the water inlet hole in the main body between the transition hole and the ventilation hole is sealed by the outer diameter of the boosting check valve; the end face of the boosting piston at one end of the upper cavity of the water outlet cavity of the main body is an integrally formed head valve plug, and the head valve plug of the boosting piston is sealed against the raised orifice at the spray hole in the spray plate seat. Thus, through the boosting structure of the boosting pipe, boosting spring and boosting piston in the water outlet cavity of the main body, the hand trigger spray gun will continue to spray mist for a period of time after the wrench is stopped, and the mist will continue to spray uninterruptedly as long as the wrench is continuously pulled.At the same time, during the above working process, the rightward movement of the boost piston will compress the gas in the boost chamber, and discharge the gas inside through the inner sleeve hole of the boost pipe and the ventilation hole of the main body through the exhaust channel, and the small hole on the top of the boost check valve to the boost check valve installation hole on the top of the main body. The small hole on the top of the boost check valve is connected to the boost chamber in the main body through the exhaust channel; when the boost piston is reset to the left, the exhaust channel is transformed into a return air channel, and the return air direction is exactly opposite to the exhaust direction, which will not be described in detail here.

[0005] The gap channel in the main body is a channel groove arranged on the inner wall of the water outlet cavity in the main body, or a gap groove between equidistant convex ribs, and the channel groove or the gap groove is communicated with the transition hole in the main body.

[0006] The ventilation hole at the middle of the bottom of the water outlet chamber of the main body is located on the inner wall of the water inlet hole in the main body at the other end of the boosting one-way valve above the transition hole in the main body, and the other end of the boosting one-way valve is a sleeve body. The outer diameter of the sleeve body of the boosting one-way valve at the ventilation hole is sleeved in the top loading hole of the main body. At the same time, one end of the outer diameter of the sleeve body of the boosting one-way valve is sealed against the inner wall of the water inlet hole in the main body, and the small hole on the top of the boosting one-way valve is arranged at the top tube mouth of the other end of the sleeve body of the boosting one-way valve.

[0007] One end of the ball valve of the boost check valve is a conical protrusion, and the two ends of the boost check valve are connected and integrally formed by a wavy elastic section, and the ball valve is limited by the conical protrusion of the boost check valve to achieve up and down floating. The above-mentioned wavy elastic section can also be replaced by a small metal spring. The above-mentioned structure facilitates the assembly of the ball valve and is a specific structural embodiment of the boost check valve.

[0008] The piston spring is omitted in the piston cavity of the main body, and the outer diameter of the piston cavity of the main body is provided with an arched first plastic spring, one end of the first plastic spring abuts against the inner side of the wrench, and the other end of the first plastic spring abuts against the outer diameter of the piston cavity of the main body.

[0009] The booster spring is replaced by a second plastic spring, the two ends of which are connected by a wave-shaped elastic section and are integrally formed, one end of the second plastic spring is inserted into an inner sleeve hole fixed to the protrusion in the booster tube, and the other end of the second plastic spring is inserted into a spring column fixed to the protrusion in the booster piston. The second plastic spring can be used in conjunction with the first plastic spring, and the hand trigger spray gun can be used as a full plastic structure.

[0010] The outer diameter of the cavity opening at the water outlet cavity of the main body is provided with raised and equidistantly distributed positioning ribs, the top of the spray plate seat is arched in a U shape, and a positioning groove is provided at the sleeve opening on one side of the spray plate seat corresponding to the positioning rib, the positioning groove is communicated with the ring-shaped fitting groove of the spray plate seat, and the bottom end corner of the inner diameter of the ring of the ring-shaped fitting groove is provided with equidistantly distributed and L-shaped raised chamfered ribs; the ring-shaped fitting groove of the spray plate seat is inserted into the cavity opening at the water outlet cavity of the main body, and at the same time, the positioning groove of the spray plate seat is inserted into the positioning rib of the main body, and the end corner of one end of the booster piston in the cavity opening at the water outlet cavity of the main body is inserted into the chamfered rib in the spray plate seat.

[0011] A positioning platform is provided on the central protrusion of one end of the spray plate seat of the boosting piston, and the positioning platform of the boosting piston is positioned and sleeved into the inner diameter of the protrusion at the spray hole in the spray plate seat.

[0012] The outer cover is respectively fixed to the rear barb and the top slide rail of the outer diameter of the main body through the rear spring buckle inside the outer cover and the top slide groove.

[0013] The boost pipe in the main body is integrally injection molded with the main body. Therefore, when the inner diameter of the boost pipe is the same, the diameter of the integrally molded gun body will be larger than that of the separated gun body; the separation scheme is to reduce the size of the entire diameter of the gun body.

[0014] The utility model has reasonable structural design, convenient production and assembly, and particularly good continuous spraying effect; the utility model is suitable for use as a continuous spraying hand button spray gun, and is a structural improvement of similar products. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the explosion structure of an embodiment of the utility model.

[0016] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure after assembly, in which the arrows are respectively the liquid inlet direction and the exhaust direction (the return air direction is opposite to the exhaust direction), and the suction pipe is omitted.

[0017] Figure 3 yes Figure 2 The three-dimensional structure of Figure 1 , the dotted line in the figure is the main structure inside the outer cover.

[0018] Figure 4 yes Figure 2 The three-dimensional structure of Figure 2 , the dotted line in the figure is the main structure inside the outer cover.

[0019] Figure 5 yes Figure 4 Schematic diagram of the three-dimensional structure of the outer cover and the spray plate seat in the open state.

[0020] Figure 6 yes Figure 2 Schematic diagram of the improved all-plastic cross-sectional structure.

[0021] Figure 7 yes Figure 1 A schematic diagram of a sectional structure of an improved main body is shown, in which the boost pipe in the main body is integrally injection molded with the main body.

[0022] Serial numbers and names of the accompanying drawings: 1. outer cover, 101. rear spring buckle, 2. booster pipe, 3. booster spring, 4. booster piston, 401. positioning platform, 5. spray plate, 6. spray plate seat, 601. positioning groove, 602. chamfered rib, 7. wrench, 8. working piston, 9. booster check valve, 10. ball valve, 11. main body, 1101. through hole, 1102. ventilation hole, 1103. transition hole, 1104. channel groove, 12. piston spring, 13. gasket, 14. spiral coil, 15. straw, 16. first plastic spring, 17. second plastic spring. Implementation

[0023] Now, in conjunction with the accompanying drawings, the structure and use of the utility model are further described. Figure 1-Figure 5 As shown, the water inlet hole, piston cavity and water outlet cavity in the main body 11 of the hand trigger spray gun are connected, a spray plate seat 6 is provided at the cavity mouth of the water outlet cavity of the main body, a spray plate 5 is provided at the spray hole inside or outside the spray plate seat, an outer cover 1 is provided on the outer diameter of the main body, one end of a wrench 7 is fastened and fixed to the outer diameter convex column at the water outlet cavity of the main body, the inner side of the wrench is fastened with one end of a working piston 8 extending from the piston cavity in the main body, and a piston spring 12 is provided in the piston cavity of the main body; a suction pipe 15 is provided at the water inlet hole at the bottom of the main body, a spiral ring 14 is provided on the outer diameter of the main body at the water inlet hole, and a seat mouth of the main body at the top of the spiral ring is provided There is a gasket 13; one end of the piston cavity of the main body is connected to the water inlet hole of the main body and is provided with a through hole 1101, the water inlet hole in the main body below the through hole is provided with a ball valve 10 installed from the top of the main body, and the water inlet hole in the main body above the through hole is provided with a boost check valve 9 installed from the top of the main body and fixed to the main body, a conical protrusion at one end of the boost check valve is limited by the inner wall of the water inlet hole in the main body above the ball valve, one side of the sleeve body at the other end of the boost check valve is interference-sealed with the orifice at the top of the main body, and a ventilation channel integrating an exhaust channel and a return air channel is provided on the other side of the sleeve body of the boost check valve.

[0024] A boosting structure is provided in the water outlet chamber of the above-mentioned main body 11, and the boosting structure includes a boosting pipe 2, a boosting spring 3 and a boosting piston 4. The boosting spring is a metal spring. The boosting pipe, the boosting spring and the boosting piston are fixed in the water outlet chamber of the main body through a spray plate seat with an outer diameter at the orifice of the water outlet chamber. The boosting spring is arranged in the boosting chamber formed between the boosting pipe and the boosting piston. The two ends of the boosting spring are respectively against the boosting piston and the boosting pipe in the boosting chamber. The inner sleeve hole raised at the bottom of the boosting pipe in the main body is sleeved with the air exchange hole 1102 in the water outlet chamber of the main body. The outer diameter of the boosting pipe in the water outlet chamber of the main body and the inner wall of the water outlet chamber of the main body are provided with a connection between the outer diameter of the boosting piston extending out of one end of the boosting pipe and the inner diameter of the spray plate seat. A gap channel is provided between the water inlet hole in the main body at the ventilation hole above the transition hole and the outer diameter of the boost check valve. When the boost piston moves to the right, the exhaust channel is connected to the main body through the small hole on the top of the boost check valve; when the boost piston resets to the left, the exhaust channel is transformed into a return air channel, and the water inlet hole in the main body between the transition hole and the ventilation hole is sealed by the outer diameter of the boost check valve; the gap channel is connected to the transition hole 1103 between the water outlet cavity and the water inlet hole in the main body at the boost check valve 9 in the main body; the end face of the boost piston at one end of the upper cavity of the water outlet cavity of the main body is an integrally formed head valve plug, and the head valve plug of the boost piston seals against the raised orifice at the spray hole in the spray plate seat. The gap channel in the main body is a channel groove 1104 arranged on the inner wall of the water outlet cavity in the main body, or a gap groove between equidistant convex ribs, and the channel groove or gap groove is connected to the transition hole in the main body. The ventilation hole at the middle of the bottom of the water outlet cavity of the main body is located on the inner wall of the water inlet hole in the main body at the other end of the boosting check valve above the transition hole in the main body. The other end of the boosting check valve is a sleeve body. The outer diameter of the sleeve body of the boosting check valve at the ventilation hole is fitted into the top loading hole of the main body. At the same time, one end of the outer diameter of the sleeve body of the boosting check valve is sealed against the inner wall of the water inlet hole in the main body. The small hole at the top of the boosting check valve is set at the top of the sleeve body of the other end of the boosting check valve. One end of the ball valve of the boosting check valve is conical convex, and the two ends of the boosting check valve are connected and integrally formed by a wave-shaped elastic section. The ball valve floats up and down through the conical convex limit of the boosting check valve.

[0025] The outer diameter of the cavity opening of the water outlet cavity of the above-mentioned main body is provided with raised and equidistantly distributed positioning ribs, the top of the spray plate seat is arched in a U shape, and a positioning groove 601 is provided on the sleeve opening of the spray plate seat corresponding to the positioning rib, and the positioning groove is communicated with the ring-shaped fitting groove of the spray plate seat, and the bottom end corner of the inner diameter of the ring of the ring-shaped fitting groove is provided with equidistantly distributed and L-shaped raised chamfered ribs 602; the ring-shaped fitting groove of the spray plate seat is inserted into the cavity opening of the water outlet cavity of the main body, and the positioning groove of the spray plate seat is inserted into the positioning rib of the main body, and the end corner of one end of the booster piston in the cavity opening of the water outlet cavity of the main body is inserted into the chamfered rib in the spray plate seat. A positioning platform 401 is provided on the center protrusion of one end of the spray plate seat of the booster piston, and the positioning platform of the booster piston is positioned and inserted into the raised inner diameter of the orifice at the spray hole in the spray plate seat. The outer cover is respectively fixed to the rear barb and the top slide rail of the outer diameter of the main body through the rear spring buckle 101 inside the outer cover and the top slide groove.

[0026] The working principle of the hand trigger spray gun is as follows: 1. When the wrench 7 starts to work, the working piston 8 moves to the right, the ball valve 10 is closed, the boost check valve 9 is opened, and the liquid in space A starts to be sent into space B; because the boost check valve 9 is a one-way valve, the liquid is sent from space A to space B and will not flow back (reflux) to space A. 2. When the liquid in space A is sent into space B, when the pressure in space B increases to a certain amount, the elastic force of the booster spring 3 is overcome and the booster piston 4 is pushed to the right, and the liquid is sprayed out from the small hole of the spray plate 5 in atomized form. As the aperture (diameter of the small hole) of the spray plate is only 0.25MM, when the liquid is sent into space B each time, it takes more than three times the time of the wrench to discharge the liquid sent from space A into space B in one operation. Therefore, when working continuously, a large amount of liquid will accumulate in space B and cannot be sprayed out from the spray plate 5 quickly. Therefore, a large amount of liquid will accumulate in space B to generate pressure and force the booster piston 4 to retreat to the right to make more space B to store liquid, and after the pulling work stops; at this time, the booster spring 3 will continue to push the booster piston 4 to return to the left to make the liquid entering space B continue to be sprayed out from the small hole of the spray plate 5 in atomized form.

[0027] The specific advantages of the hand-held spray gun are as follows: 1) In the initial state, the booster check valve 9 and the ball valve 10 are closed; 2) When the wrench 7 is pulled, the working piston 8 moves to the right, the ball valve 10 is closed, and the booster check valve 9 is opened, forcing the liquid in space A to start being pressed into space B; 3) At this time, the pressure of space B is forced to increase during the process of the liquid entering space B, forcing the booster piston 4 to be compressed, and the booster spring 3 to retreat to the right; because the head valve plug and the booster piston 4 are integrally formed, when the booster piston 4 retreats to the right, the head valve plug of the booster piston 4 opens, and the liquid is sprayed out from the spray piece 5 in an atomized manner; 4) After the above-mentioned wrench 7 is pulled to drive the working piston 8 to complete a work, the booster valve 9 is closed, and after the liquid atomization spraying is completed, the head valve plug of the booster piston 4 is closed to the left; 5) When the wrench 7 is released, the working piston 8 moves to the left, the ball valve 10 is opened, and the booster check valve 9 is closed under the action of the elastic force, and space A is in a vacuum state, forcing the liquid to be sucked into space A.

[0028] According to the above structural characteristics, such as Figure 6 As shown, the piston spring may be omitted in the piston cavity of the above-mentioned main body, and the outer diameter of the piston cavity of the main body may be provided with an arched first plastic spring 16, one end of the first plastic spring abuts against the inner side of the wrench, and the other end of the first plastic spring abuts against the main body of the outer diameter of the piston cavity. At the same time, the boost spring is replaced by a second plastic spring 17, the two ends of which are connected by a wavy elastic section and integrally formed, one end of the second plastic spring is inserted into and fixed to the raised inner sleeve hole in the boost pipe, and the other end of the second plastic spring is inserted into and fixed to the raised spring column in the boost piston. Figure 7 As shown, according to the above structural characteristics, the boost pipe in the main body can also be integrally injection molded with the main body.

Claims

1. A continuous spray type hand trigger spray gun, wherein a water inlet hole, a piston cavity and a water outlet cavity are communicated in a main body (11) of the hand trigger spray gun, a spray plate seat (6) is provided at the cavity opening of the water outlet cavity of the main body, a spray plate (5) is provided at the spray hole inside or outside the spray plate seat, an outer cover (1) is provided on the outer diameter of the main body, one end of a wrench (7) is fastened and fixed to a convex column on the outer diameter of the water outlet cavity of the main body, the inner side of the wrench is fastened and fastened with one end of a working piston (8) extending from the piston cavity in the main body, and a piston spring (12) is provided in the piston cavity of the main body; a suction pipe (15) is provided at the water inlet hole at the bottom of the main body, a spiral ring (14) is provided on the outer diameter of the main body at the water inlet hole, and the inner top of the spiral ring is fixed to the outer diameter of the main body. A gasket (13) is provided at the seat opening of the main body; a through hole (1101) is provided at one end of the piston cavity of the main body in communication with the water inlet hole of the main body; a ball valve (10) is provided at the water inlet hole in the main body below the through hole, which is installed from the top of the main body; a boost check valve (9) is provided at the water inlet hole in the main body above the through hole, which is installed from the top of the main body and fixed to the main body; a conical protrusion at one end of the boost check valve is limited by the inner wall of the water inlet hole in the main body above the ball valve; one side of the sleeve body at the other end of the boost check valve is interference-sealed with the hole at the top of the main body; a ventilation channel integrating an exhaust channel and a return air channel is provided at the other side of the sleeve body of the boost check valve; it is characterized in that A boosting structure is provided in the water outlet chamber of the main body (11), and the boosting structure comprises a boosting pipe (2), a boosting spring (3) and a boosting piston (4). The boosting spring is a metal spring. The boosting pipe, the boosting spring and the boosting piston are fixed in the water outlet chamber of the main body through a spray plate seat (6) with an outer diameter at the opening of the water outlet chamber. The boosting spring is arranged in the boosting chamber formed between the boosting pipe and the boosting piston. The two ends of the boosting spring are respectively against the boosting piston and the boosting pipe in the boosting chamber. The inner sleeve hole protruding at the bottom of the boosting pipe in the main body is sleeved with the air exchange hole (1102) in the water outlet chamber of the main body. The outer diameter of the boosting pipe in the water outlet chamber of the main body and the inner wall of the water outlet chamber of the main body are provided with the outer diameter of the boosting piston extending out of one end of the boosting pipe and the inner diameter of the spray plate seat. A gap channel is connected between the two, the gap channel is connected to the transition hole (1103) between the water outlet chamber and the water inlet hole in the main body at the boosting one-way valve (9) in the main body, and an exhaust channel is provided between the water inlet hole in the main body and the outer diameter of the boosting one-way valve at the ventilation hole above the transition hole; when the boosting piston moves to the right, the exhaust channel is connected to the main body through the small hole on the top of the boosting one-way valve; when the boosting piston is reset to the left, the exhaust channel is transformed into a return air channel, and the water inlet hole in the main body between the transition hole and the ventilation hole is sealed by the outer diameter of the boosting one-way valve; the end face of the boosting piston at one end of the upper cavity opening of the water outlet chamber of the main body is an integrally formed head valve plug, and the head valve plug of the boosting piston is sealed against the raised hole at the spray hole in the spray plate seat.

2. The continuous spray hand trigger spray gun according to claim 1, characterized in that The gap channel in the main body (11) is a channel groove (1104) arranged on the inner wall of the water outlet cavity in the main body, or a gap groove between equidistant convex ribs, and the channel groove or the gap groove is communicated with the transition hole (1103) in the main body.

3. The continuous spray hand trigger spray gun according to claim 1, characterized in that The ventilation hole (1102) at the middle of the bottom of the water outlet cavity of the main body (11) is located above the transition hole (1103) in the main body and on the inner wall of the water inlet hole in the main body at the other end of the boosting check valve (9). The other end of the boosting check valve is a sleeve body. The outer diameter of the sleeve body of the boosting check valve at the ventilation hole is sleeved in the top loading hole of the main body. At the same time, one end of the outer diameter of the sleeve body of the boosting check valve is sealed against the inner wall of the water inlet hole in the main body. The small hole at the top of the boosting check valve is arranged at the top tube mouth of the other end of the sleeve body of the boosting check valve.

4. The continuous spray hand trigger spray gun according to claim 1, characterized in that One end of the ball valve (10) of the boost check valve (9) is in the form of a conical protrusion, and the two ends of the boost check valve are connected via a wave-shaped elastic section and are integrally formed, and the ball valve is limited by the conical protrusion of the boost check valve to achieve up and down floating.

5. The continuous spray hand trigger spray gun according to claim 1, characterized in that The piston spring (12) is omitted in the piston cavity of the main body (11), and the outer diameter of the piston cavity of the main body is provided with an arched first plastic spring (16), one end of the first plastic spring abuts against the inner side of the wrench (7), and the other end of the first plastic spring abuts against the outer diameter of the piston cavity of the main body.

6. The continuous spray hand trigger spray gun according to claim 1, characterized in that The boost spring (3) is replaced by a second plastic spring (17), the two ends of the second plastic spring being connected via a wave-shaped elastic section and integrally formed, one end of the second plastic spring being inserted into an inner sleeve hole fixed to a protrusion in the boost pipe (2), and the other end of the second plastic spring being inserted into a spring column fixed to a protrusion in the boost piston (4).

7. The continuous spray hand trigger spray gun according to claim 1, characterized in that The outer diameter of the water outlet cavity of the main body (11) is provided with raised and equidistantly distributed positioning ribs, the top of the spray plate seat (6) is arched in a U shape, and a positioning groove (601) is provided at the sleeve opening on one side of the spray plate seat corresponding to the positioning rib, the positioning groove is communicated with the annular sleeve groove of the spray plate seat, and the bottom end corner of the inner ring of the annular sleeve groove is provided with equidistantly distributed and L-shaped raised chamfered ribs (602); when the annular sleeve groove of the spray plate seat is inserted into the cavity opening of the water outlet cavity of the main body, the positioning groove of the spray plate seat is inserted into the positioning rib of the main body, and the end corner of one end of the booster piston (4) in the cavity opening of the water outlet cavity of the main body is inserted into the chamfered rib in the spray plate seat.

8. The continuous spray hand trigger spray gun according to claim 1, characterized in that A positioning platform (401) is provided at a central protrusion at one end of the spray plate seat (6) of the booster piston (4), and the positioning platform of the booster piston is positioned and sleeved into the inner diameter of the protrusion at the spray hole in the spray plate seat.

9. The continuous spray hand trigger spray gun according to claim 1, characterized in that The outer cover (1) is fixed to the rear barb and the top slide rail of the outer diameter of the main body (11) by respectively snapping together the rear spring buckle (101) inside the outer cover and the top slide groove.

10. The continuous spray hand trigger spray gun according to claim 1, characterized in that The boost pipe (2) in the main body (11) is integrally injection-molded with the main body.

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