Alternating current spray gun

Abstract

The invention discloses an alternating current spray gun, and relates to the technical field of spraying tools. Comprising a main machine, a gun body and a material barrel, an AC motor is arranged in the main machine, a handle is arranged at the bottom of the main machine, a microswitch and a switch reset rod used for starting the microswitch are arranged in the handle, dustproof cotton located at one end of the AC motor is further arranged in the main machine, and one end of the main machine is detachably connected with the gun body; a flow channel is formed in the gun body, and an adjusting rod is movably arranged in the flow channel. By means of the built-in AC motor, an air compressor is not needed for air supply, using is more convenient, the size is small, the wall spraying work efficiency is high, the sprayed disinfectant atomization effect is good, the spraying effect is uniform and fine, the work efficiency is improved, the stroke of the adjusting rod is controlled by rotating the adjusting knob, the spraying flow is reasonably controlled, the backflow prevention design is adopted, the product spraying angle is increased, and the product spraying quality is improved. The use is safer, and the adjustable spray head meets the use requirements of users.

Description

Technical Field

[0001] The invention relates to the technical field of spraying tools, in particular to an AC spray gun. Background Art

[0002] Spray guns are a type of equipment that uses liquid or compressed air to quickly release power. Spray guns are divided into two types: general pressure type and pressurized type. Spray guns also include pressure type spray guns, Carle type spray guns, automatic recovery type spray guns,

[0003] At present, the existing spray guns need to be connected to air source equipment such as air compressors for use. Air compressors are large and heavy, have poor portability and are expensive, which means that users can only use brushes for daily wall painting or painting. The work efficiency of wall painting and painting with brushes is slow and the paint and wall painting effects are uneven and delicate, the work efficiency is slow, and the use effect is not ideal. Summary of the invention

[0004] To achieve the above object, the present invention provides the following technical solution: an AC spray gun, comprising a main unit, a gun body and a barrel, wherein an AC motor is arranged inside the main unit, a handle is arranged at the bottom of the main unit, a micro switch and a switch reset rod for activating the micro switch are arranged inside the handle, dustproof cotton located at one end of the AC motor is also arranged inside the main unit, and one end of the main unit is detachably connected to the gun body;

[0005] The gun body is provided with a flow channel inside, an adjusting rod is movably provided inside the flow channel, a threaded cover for connecting to a barrel is provided at the bottom of the gun body, and a water suction pipe is provided inside the threaded cover, one end of which is connected to the flow channel and the other end of which extends to the inside of the barrel;

[0006] The gun body is provided with a trigger outside the gun body, the trigger is provided with a driving shaft sleeved with the gun body, the flow channel and the inside of the adjusting rod, and one end of the switch reset rod extends to one side of the trigger;

[0007] The end of the gun body away from the main machine is provided with a nozzle and a spray head in sequence, and one end of the adjustment rod extends to the inside of the nozzle.

[0008] As a preferred technical solution of the present invention, a conical part connected to the inside of the flow channel is provided on one side of the nozzle, and a plurality of vents distributed around the conical part are provided inside the nozzle, and the vents are connected to the inside of the gun body.

[0009] As a preferred technical solution of the present invention, one end of the conical part extends to the interior of the spray head, at least two bosses are symmetrically arranged on one side of the spray head, one side of the boss is a slope, at least two air outlet holes 1 are arranged inside the boss, and the two air outlet holes 1 are different in size, and a plurality of air outlet holes 2 are arranged inside the spray head in a ring-shaped distribution, and the air outlet holes 1 and the air outlet holes 2 are both connected to the interior of the gun body through air vents.

[0010] As a preferred technical solution of the present invention, an air collecting barrel and an air collecting barrel cover located at one end of the air collecting barrel are provided inside the main unit, the AC motor is arranged inside the air collecting barrel and the air collecting barrel cover, and one end of the main unit is movably connected with a back cover located on one side of the dust-proof cotton.

[0011] As a preferred technical solution of the present invention, the outside of the AC motor is also provided with a motor sealing ring located at the connection between the air collecting barrel and the air collecting barrel cover, a screw buckle groove is provided on the outside of one end of the gun body, and a screw buckle movably engaged with the screw buckle groove is provided on the inside of one end of the air collecting barrel.

[0012] As a preferred technical solution of the present invention, a switch reset spring is arranged inside the handle and is sleeved with the interior of one end of the switch reset rod, and a base is arranged at the bottom of the handle.

[0013] As a preferred technical solution of the present invention, a cable sheath with one end extending to the outside of the base is provided inside the base, and a cable with a plug is also provided inside the base with one end passing through the cable sheath and extending to the outside of the base, and the other end of the cable with a plug is fixed to the inside of the base by a plastic wire pressing plate.

[0014] As a preferred technical solution of the present invention, the outer sleeve of the water suction pipe is provided with a barrel sealing ring, the barrel and the threaded cover are screwed together to tighten the barrel sealing ring, a plurality of incisions are opened inside the barrel sealing ring for connecting the barrel, and the interior of the threaded cover is also provided with a backflow valve joint located on one side of the water suction pipe and connected to the interior of the gun body, and an anti-backflow leather cup is provided outside the backflow valve joint.

[0015] As a preferred technical solution of the present invention, a hinge seat is provided on the top of the gun body, and the two ends of the top of the trigger are respectively hinged to the two ends of the hinge seat, and waist-shaped holes that are movably sleeved with the surface of the drive shaft are opened on both sides of the gun body, and an adjusting knob is threadedly sleeved on one side of the trigger, and an adjusting spring is provided on one side of the adjusting knob.

[0016] As a preferred technical solution of the present invention, an adjusting rod spring is provided at one end of the adjusting rod, and at least one adjusting rod sealing ring is sleeved on the adjusting rod. A fixing nut for tightening the spray head is threadedly sleeved at one end of the gun body, and a gun body sealing ring located inside the air collecting barrel is also sleeved on the surface of the gun body.

[0017] Compared with the prior art, the present invention provides an AC spray gun, which has the following beneficial effects:

[0018] This AC spray gun has a built-in AC motor and does not require an air compressor for air supply. It is more portable and compact, has fast wall spraying efficiency, good atomization effect for spraying disinfectant, and a uniform and delicate spraying effect, which improves work efficiency. The stroke of the adjustment rod can be controlled by turning the adjustment knob to reasonably control the spray flow rate. The anti-backflow design increases the product spraying angle, makes it safer to use, and has an adjustable spray head to meet user needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of an AC spray gun proposed by the present invention;

[0020] Figure 2 A schematic diagram of the structure of an adjustment rod of an AC spray gun proposed by the present invention;

[0021] Figure 3 This is an exploded diagram of the structure of an AC spray gun proposed by the present invention;

[0022] Figure 4 A cross-sectional view of the gun body structure of an AC spray gun proposed by the present invention;

[0023] Figure 5 This is a schematic diagram of the nozzle and spray head structure of an AC spray gun proposed by the present invention.

[0024] In the figure: 1. Main unit; 11. AC motor; 12. Air collecting barrel; 13. Motor sealing ring; 14. Air collecting barrel cover; 15. Dustproof cotton; 16. Back cover; 17. Handle; 171. Switch reset rod; 172. Switch reset spring; 173. Micro switch; 18. Base; 181. Cable sheath; 182. Cable with plug; 183. Plastic wire pressing plate; 2. Gun body; 201. Gun body sealing ring; 202. Rotary buckle groove; 203. Articulated seat; 204. Waist-shaped hole; 205. Flow channel ; 21. Threaded cap; 22. Adjusting rod; 221. Adjusting rod sealing ring; 222. Adjusting rod spring; 23. Nozzle; 231. Conical piece; 232. Vent hole; 24. Spray head; 241. Boss; 242. Vent hole 1; 243. Vent hole 2; 25. Fixing nut; 26. Backflow valve connector; 261. Anti-backflow leather cup; 27. Suction pipe; 271. Barrel sealing ring; 28. Trigger; 281. Adjusting knob; 282. Adjusting spring; 283. Drive shaft; 3. Barrel. DETAILED DESCRIPTION

[0025] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0026] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0027] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0028] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0029] Unless otherwise stated, the term "plurality" means two or more.

[0030] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0031] See also Figure 1-5 An AC spray gun includes a main unit 1, a gun body 2 and a material barrel 3. An AC motor 11 is arranged inside the main unit 1. A handle 17 is arranged at the bottom of the main unit 1. A micro switch 173 and a switch reset rod 171 for starting the micro switch 173 are arranged inside the handle 17. Dust-proof cotton 15 located at one end of the AC motor 11 is also arranged inside the main unit 1. One end of the main unit 1 is detachably connected to the gun body 2.

[0032] A flow channel 205 is provided inside the gun body 2, and an adjusting rod 22 is movably provided inside the flow channel 205. A threaded cover 21 for connecting to the barrel 3 is provided at the bottom of the gun body 2. A water suction pipe 27 is provided inside the threaded cover 21, one end of which is connected to the flow channel 205 and the other end of which extends to the inside of the barrel 3.

[0033] The gun body 2 is provided with a trigger 28 movably disposed outside thereof. The trigger 28 is provided with a driving shaft 283 which is sleeved with the gun body 2 , the flow channel 205 and the adjusting rod 22 . One end of the switch reset rod 171 extends to one side of the trigger 28 .

[0034] The end of the gun body 2 away from the main unit 1 is provided with a nozzle 23 and a spray head 24 in sequence, and one end of the adjusting rod 22 extends to the inside of the nozzle 23. Through the built-in AC motor 11, there is no need to use an air compressor for air supply. It is more portable and compact, has high wall spraying efficiency, good atomization effect of spraying disinfectant, and uniform and delicate spraying effect, which improves work efficiency. The stroke of the adjusting rod 22 is controlled by turning the adjusting knob 281, and the spraying flow is reasonably controlled. The anti-backflow design increases the product spraying angle, makes it safer to use, and the adjustable spray head 24 meets the user's needs.

[0035] As a specific technical solution of this embodiment, a conical part 231 connected to the inside of the flow channel 205 is provided on one side of the nozzle 23, and a plurality of vents 232 distributed around the conical part 231 are provided inside the nozzle 23. The vents 232 are connected to the inside of the gun body 2. When the AC motor 11 is started to discharge air, part of the air enters the inside of the barrel 3 through the cutout on the backflow valve joint 26 and the barrel sealing ring 271, so that the liquid inside the barrel 3 is pressurized and absorbs water. The tube 27 enters the flow channel 205, and the user pulls the trigger 28. The trigger 28 drives the adjusting rod 22 through the driving shaft 283 to compress the adjusting rod spring 222, so that a gap is formed between one end of the adjusting rod 22 and the inside of the conical member 231, and the liquid can be sprayed out through this gap. The air inside the gun body 2 is discharged through the vent hole 232 and the air outlet hole 242. The air outlet hole 242 breaks up the liquid and sprays it in atomized form. The setting of the air outlet hole 243 can make the atomized liquid spray farther.

[0036] As a specific technical solution of this embodiment, one end of the conical member 231 extends to the interior of the spray head 24, and at least two bosses 241 are symmetrically arranged on one side of the spray head 24, and one side of the boss 241 is a slope, and at least two air outlet holes 242 are arranged inside the boss 241, and the two air outlet holes 242 are of different sizes, and a plurality of air outlet holes 243 distributed in a ring shape are arranged inside the spray head 24, and the air outlet holes 1 242 and the air outlet holes 243 are both connected to the interior of the gun body 2 through the vent 232, and the gas is sprayed out through the air outlet hole 1 242 to flatten the liquid, and the size of the gas affects the amount of the flattened liquid, thereby changing the degree of flattening the liquid, so that the liquid spraying shape is adjusted, and there are three shapes, namely circular, horizontal, and longitudinal. The three spray shapes can be switched by rotating the spray head 24 to adapt to the use of spray surfaces of different shapes.

[0037] As a specific technical solution of this embodiment, the interior of the host 1 is provided with an air collecting barrel 12 and an air collecting barrel cover 14 located at one end of the air collecting barrel 12, the AC motor 11 is arranged inside the air collecting barrel 12 and the air collecting barrel cover 14, and one end of the host 1 is movably connected with a back cover 16 located on one side of the dust-proof cotton 15, the air collecting barrel cover 14 and the air collecting barrel 12 are used to install the AC motor 11, and the dust-proof cotton 15 can filter the air and prevent the air from entering the interior of the host 1, which is safer to use. The back cover 16 is mesh-shaped and does not affect the air intake. The movably connected manner of the back cover 16 facilitates the replacement of the dust-proof cotton 15 and makes later maintenance more convenient.

[0038] As a specific technical solution of this embodiment, the outside of the AC motor 11 is also provided with a motor sealing ring 13 located at the connection between the air collecting barrel 12 and the air collecting barrel cover 14, and a screw buckle groove 202 is provided on the outside of one end of the gun body 2, and a screw buckle movably engaged with the screw buckle groove 202 is provided inside one end of the air collecting barrel 12. The motor sealing ring 13 is used to seal the connection between the air collecting barrel 12 and the air collecting barrel cover 14, thereby ensuring the air outlet efficiency of the AC motor 11 and avoiding leakage.

[0039] As a specific technical solution of this embodiment, a switch reset spring 172 is arranged inside the handle 17 and is sleeved inside one end of a switch reset rod 171. A base 18 is arranged at the bottom of the handle 17. A cable sheath 181 with one end extending to the outside of the base 18 is arranged inside the base 18. A plugged cable 182 with one end passing through the cable sheath 181 and extending to the outside of the base 18 is also arranged inside the base 18. The other end of the plugged cable 182 is fixed inside the base 18 by a plastic pressing plate 183. The plugged cable 182 can be used by connecting the plugged cable 182 to the mains. The provision of the cable sheath 181 avoids excessive damage to the end of the plugged cable 182, making it safer to use. When the card-lock reset rod is pushed by the trigger 28, the switch reset spring 172 is compressed, and the micro switch 173 is simultaneously turned to start the AC motor 11.

[0040] As a specific technical solution of this embodiment, the outer sleeve of the water suction pipe 27 is provided with a barrel sealing ring 271, and the barrel 3 and the threaded cover 21 are screwed together to tighten the barrel sealing ring 271. The inner part of the barrel sealing ring 271 is provided with a plurality of incisions for connecting the barrel 3. The inner part of the threaded cover 21 is also provided with a backflow valve joint 26 located on one side of the water suction pipe 27 and connected to the inner part of the gun body 2. The outer part of the backflow valve joint 26 is provided with an anti-backflow leather cup 261. The setting of the anti-backflow leather cup 261 prevents the barrel 3 from being inverted and the liquid from flowing into the inner part of the gun body 2. The multiple incisions on the barrel sealing ring 271 are used for air intake, which can reduce the occurrence of liquid backflow and ensure the sealing of the connection between the barrel 3 and the threaded cover 21.

[0041] As a specific technical solution of this embodiment, a hinge seat 203 is provided on the top of the gun body 2, and the two ends of the top of the trigger 28 are respectively hinged to the two ends of the hinge seat 203, and waist-shaped holes 204 movably sleeved with the surface of the drive shaft 283 are provided on both sides of the gun body 2. An adjusting knob 281 is threadedly sleeved on one side of the trigger 28, and an adjusting spring 282 is provided on one side of the adjusting knob 281. When in use, the trigger 28 is pulled, and the trigger 28 rotates with the hinge seat 203 as the center of the circle. While the trigger 28 rotates, the adjusting rod 22 is driven backward through the driving shaft 283, so that a gap is left between one end of the adjusting rod 22 and the inside of the conical member 231, so that water can enter through the suction pipe 27. The liquid inside the flow channel 205 is sprayed out through this gap. Holes of the same size as the waist-shaped hole 204 are also provided on both sides of the flow channel 205. The setting of the waist-shaped hole 204 increases the activity space of the drive shaft 283, and the movement process of the drive shaft 283 is more flexible. When the trigger 28 is pulled into place, the adjusting knob 281 will contact the handle 17. By rotating the adjusting knob 281, the relative distance between the adjusting knob 281 and the trigger 28 can be controlled, so as to control the rotation stroke of the trigger 28, thereby adjusting the gap between the adjusting rod 22 and the conical member 231, adjusting the liquid spray amount, adjusting the setting of the spring 282, and continuously applying a resistance force to the adjusting knob 281, thereby ensuring the stability of the adjusting knob 281.

[0042] As a specific technical solution of this embodiment, an adjusting rod spring 222 is provided at one end of the adjusting rod 22, and at least one adjusting rod sealing ring 221 is sleeved on the adjusting rod 22. A fixing nut 25 for pressing the spray head 24 is threadedly sleeved on one end of the gun body 2. A gun body sealing ring 201 located inside the air collecting barrel 12 is also sleeved on the surface of the gun body 2. The position of the adjusting rod sealing ring 221 is staggered with the water suction pipe 27, so that the liquid entering the flow channel 205 through the water suction pipe 27 will not pass through the flow channel 20 5 flows into the interior of the gun body 2, and the number of the adjusting rod sealing ring 221 is not less than one, which further ensures the sealing safety of the product. The fixing nut 25 is used to compress the spray head 24. The fixing nut 25 is slightly loosened to rotate the spray head 24 for angle adjustment. The setting of the adjusting rod spring 222 makes it possible for the adjusting rod spring 222 to reset after the trigger 28 is released, and the adjusting rod spring 222 will reset to resist the reset of the adjusting rod 22 to block the nozzle 23. At the same time, the trigger 28 is away from the switch reset rod, and the switch reset rod 171 is reset to turn off the micro switch 173 and the AC motor 11.

[0043] When in use, it can be used by connecting the mains power through the plug cable 182, and the AC motor 11 is started to discharge air. Part of the air enters the barrel 3 through the backflow valve and the cutout on the barrel sealing ring 271, so that the liquid inside the barrel 3 is pressurized and enters the flow channel 205 through the suction pipe 27. The user pulls the trigger 28, and the trigger 28 drives the adjusting rod 22 to compress the adjusting rod spring 222 through the driving shaft 283, so that there is a gap between one end of the adjusting rod 22 and the inside of the conical part 231, and the liquid can be sprayed out through this gap. When the AC motor 11 is started, the air entering the gun body 2 is discharged through the vent hole 232 and the air outlet hole 242. The air outlet hole 242 breaks up the liquid and sprays it in atomized form. The setting of the air outlet hole 243 can make the atomized liquid spray farther.

[0044] To sum up, the AC spray gun, through the built-in AC motor 11, does not need to use an air compressor for air supply, is more portable, compact, has fast wall spraying efficiency, good atomization effect of spraying disinfectant, and has a uniform and delicate spraying effect, which improves work efficiency. The stroke of the adjusting rod 22 is controlled by turning the adjusting knob 281, and the spray flow is reasonably controlled. The anti-backflow design increases the product spraying angle, makes it safer to use, and the adjustable spray head 24 meets user needs.

[0045] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An AC spray gun, comprising a main machine (1), a gun body (2) and a material barrel (3), characterized in that: An AC motor (11) is arranged inside the main machine (1), a handle (17) is arranged at the bottom of the main machine (1), a micro switch (173) and a switch reset rod (171) for activating the micro switch (173) are arranged inside the handle (17), a dustproof cotton (15) located at one end of the AC motor (11) is also arranged inside the main machine (1), and one end of the main machine (1) is detachably connected to a gun body (2); The gun body (2) is provided with a flow channel (205) inside, an adjusting rod (22) is movably provided inside the flow channel (205), a threaded cover (21) for connecting to a material barrel (3) is provided at the bottom of the gun body (2), and a water suction pipe (27) is provided inside the threaded cover (21) with one end connected to the flow channel (205) and the other end extending to the inside of the material barrel (3); The gun body (2) is provided with a trigger (28) movably disposed outside the gun body (2), and the trigger (28) is provided with a driving shaft (283) sleeved with the gun body (2), the flow channel (205) and the inside of the adjustment rod (22), and one end of the switch reset rod (171) extends to one side of the trigger (28); A nozzle (23) and a spray head (24) are sequentially arranged at one end of the gun body (2) away from the main machine (1), and one end of the adjustment rod (22) extends to the inside of the nozzle (23).

2. The AC spray gun according to claim 1, characterized in that: A conical part (231) connected to the interior of the flow channel (205) is provided on one side of the nozzle (23), and a plurality of vent holes (232) distributed around the conical part (231) are provided inside the nozzle (23), and the vent holes (232) are connected to the interior of the gun body (2).

3. An AC spray gun according to claim 2, characterized in that: One end of the conical member (231) extends to the interior of the spray head (24); at least two bosses (241) are symmetrically arranged on one side of the spray head (24); one side of the bosses (241) is an inclined surface; at least two air outlet holes (242) are arranged inside the bosses (241); and the two air outlet holes (242) are of different sizes; a plurality of air outlet holes (243) are arranged inside the spray head (24) in an annular distribution; and both the air outlet holes (242) and the air outlet holes (243) are connected to the interior of the gun body (2) through the vent hole (232).

4. The AC spray gun according to claim 1, characterized in that: The main unit (1) is provided with an air collecting barrel (12) and an air collecting barrel cover (14) located at one end of the air collecting barrel (12); the AC motor (11) is arranged inside the air collecting barrel (12) and the air collecting barrel cover (14); and one end of the main unit (1) is movably connected to a rear cover (16) located on one side of the dustproof cotton (15).

5. The AC spray gun according to claim 1, characterized in that: The AC motor (11) is also sleeved with a motor sealing ring (13) located at the connection between the air collecting barrel (12) and the air collecting barrel cover (14), one end of the gun body (2) is provided with a screw button groove (202) on the outside, and one end of the air collecting barrel (12) is provided with a screw button that is movably engaged with the screw button groove (202) on the inside.

6. The AC spray gun according to claim 1, characterized in that: A switch reset spring (172) is provided inside the handle (17) and is sleeved inside one end of the switch reset rod (171). A base (18) is provided at the bottom of the handle (17).

7. An AC spray gun according to claim 6, characterized in that: The base (18) is provided with a cable sheath (181) at one end extending to the outside of the base (18), and the base (18) is also provided with a plugged cable (182) at one end passing through the cable sheath (181) and extending to the outside of the base (18), and the other end of the plugged cable (182) is fixed to the inside of the base (18) via a plastic wire pressing plate (183).

8. The AC spray gun according to claim 1, characterized in that: The outer sleeve of the water suction pipe (27) is provided with a barrel sealing ring (271), and the barrel (3) and the threaded cover (21) are screwed together to compress the barrel sealing ring (271). The inner part of the barrel sealing ring (271) is provided with a plurality of cutouts for connecting with the barrel (3). The inner part of the threaded cover (21) is also provided with a backflow valve joint (26) located on one side of the water suction pipe (27) and connected with the inner part of the gun body (2), and the outer part of the backflow valve joint (26) is provided with an anti-backflow leather cup (261).

9. The AC spray gun according to claim 1, characterized in that: A hinge seat (203) is arranged at the top of the gun body (2), and the two ends of the top of the trigger (28) are respectively hinged to the two ends of the hinge seat (203), and waist-shaped holes (204) movably sleeved with the surface of the driving shaft (283) are opened on both sides of the gun body (2), and an adjusting knob (281) is threadedly sleeved on one side of the trigger (28), and an adjusting spring (282) is arranged on one side of the adjusting knob (281).

10. The AC spray gun according to claim 1, characterized in that: An adjusting rod spring (222) is provided at one end of the adjusting rod (22), and at least one adjusting rod sealing ring (221) is sleeved on the adjusting rod (22). A fixing nut (25) for pressing the spray head (24) is threadedly sleeved on one end of the gun body (2), and a gun body sealing ring (201) located inside the air collecting barrel (12) is also sleeved on the surface of the gun body (2).

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