Spray gun

Abstract

The spray gun comprises a spray gun body and a feed liquid bottle, the spray gun body comprises a handle, a transition portion and a gun body which are sequentially connected from bottom to top, a muzzle is arranged at the front end of the gun body, an electric air pump is arranged in the handle, a circuit board is arranged in the transition portion, and the feed liquid bottle is arranged in the circuit board. An electric air pump and a storage battery are arranged in the gun body, and a jet head extending outwards is arranged in the muzzle; the handle and the electric air pump of the gun body are respectively connected with the jet head through airflow pipelines, the handle and the electric air pump of the gun body are respectively and electrically connected with the circuit board through wires, and the circuit board is electrically connected with the storage battery through a wire; the feed liquid bottle comprises a bottle body and a spray needle, and the spray needle is arranged on the bottle body. The electric air pump is reasonable in structural design, the generated air amount is two times that of a traditional single pump, the pressure can be effectively increased, the size of a single electric air pump does not need to be increased, and the spraying atomization effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of spray guns, in particular to a spray gun. Background Art

[0002] A spray gun is a device that uses liquid or compressed air to quickly release power. The spray gun can be used directly with paint in the industry, thereby using compressed air to guide and impact the paint to achieve paint atomization. The atomized paint can be used to repair locally damaged paint on the vehicle.

[0003] However, current spray guns generally have only one electric air pump, so that the compressed gas ejected by the spray gun has the problem of too low air pressure or air volume, and thus cannot well produce a large area of ​​mist paint, thus affecting actual use. Utility Model Content

[0004] The utility model aims to provide a spray gun to solve the technical problem that the current spray guns in the prior art generally have only one electric air pump, so that the compressed gas sprayed by the spray gun has a problem of too small air pressure or air volume, thereby failing to well produce a large area of ​​mist paint, thus affecting the actual use.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model provides a spray gun, including a spray gun body and a liquid bottle, the spray gun body including a handle, a transition part, and a gun body connected in sequence from bottom to top, a muzzle is provided at the front end of the gun body, an electric air pump is provided inside the handle, a circuit board is provided inside the transition part, an electric air pump and a battery are provided inside the gun body, and a jet head extending outward is provided in the muzzle; the handle and the electric air pump of the gun body are respectively connected to the jet head through an airflow duct, the handle and the electric air pump of the gun body are respectively electrically connected to the circuit board through a wire, and the circuit board is electrically connected to the battery through a wire; the liquid bottle includes a bottle body and a spray needle, the spray needle is arranged on the bottle body, and when the jet head and the spray needle are close to each other, the gas sprayed by the jet head can cause negative pressure to form near the spray needle.

[0006] Furthermore, an air pressure regulating button is electrically connected to the circuit board, and the air pressure regulating button can move outward through the outer surface of the transition portion; when the air pressure regulating button is pressed, different gears of the working air pressure of the electric air pump can be switched.

[0007] Furthermore, the circuit board is electrically connected to a plurality of gear display lights, which extend outward through the outer surface of the transition portion, and can display different gears of the working air pressure of the electric air pump.

[0008] Furthermore, the circuit board is electrically connected to a charging port, which passes outward through the outer surface of the transition portion; when a charging cable is inserted into the charging port for charging, several gear display lights can also display different gears of the battery charging power.

[0009] Furthermore, a push switch is electrically connected to the circuit board, and the push switch can move outward through the outer surface of the transition portion, and the push switch can control the start and stop of the spray gun body.

[0010] Furthermore, a three-way pipe is provided inside the gun body, the handle and the electric air pump of the gun body are connected to two pipe openings of the three-way pipe through airflow pipes respectively, and the nozzle is connected to the other pipe opening of the three-way pipe through the airflow pipe.

[0011] Furthermore, the liquid bottle is detachably installed below the muzzle, the top of the bottle body is threadedly connected to a liquid cover, the bottom of the liquid cover is provided with a liquid suction tube extending into the bottle body, the top of the liquid cover is threadedly connected to the spray needle, and the top edge of the liquid cover is provided with an air inlet, which is communicated with the bottle body.

[0012] Furthermore, the gun body extends forward and upward, the liquid bottle extends forward and upward, the angle between the jet head and the spray needle is acute, the bottom end of the muzzle is provided with a connecting bayonet, and a connecting plate is provided in the connecting bayonet; a mounting frame is provided at the upper rear end of the connecting plate, and a mounting sleeve is provided at the lower front end of the connecting plate, the mounting frame is assembled in the muzzle, the jet head passes through the mounting frame, the mounting sleeve is threadedly connected to the top of the liquid cover, the spray needle passes through the mounting sleeve upward, and a gap is left between the air inlet and the mounting sleeve.

[0013] Furthermore, a rotating hole is provided in the middle of the connecting plate, and a rotating shaft extending axially left and right is provided in the connecting bayonet, and the rotating hole and the rotating shaft are rotatably matched to adjust the rotation angle of the connecting plate; the outer shell of the spray gun body is formed by two left and right half shells locked by screws, and the connecting plate can be locked and fixed; the outer shell of the spray gun body and the connecting plate are respectively set to outer shell plastic and plastic plate, and the hardness of the outer shell plastic is lower than the hardness of the plastic plate.

[0014] Furthermore, the spray gun also includes a bottle cap, and when the mounting sleeve is detached from the liquid cover, the bottle cap can be threadedly connected to the top of the liquid cover; the top of the bottle cap has a sealing end, and the bottom edge of the bottle cap is provided with a sealing edge, the sealing end and the sealing edge can respectively seal the spray needle and the air inlet hole, the bottle body is provided with a stirring bead, the bottom end of the liquid suction tube is connected to the top end of the filter head, the middle part of the bottom end of the filter head is provided with a filter net, and the bottom edge of the filter head is provided with a plurality of supporting points, and there is a liquid flow interval between two adjacent supporting points.

[0015] In summary, the technical solution of the utility model has the following beneficial effects: the utility model has a reasonable structural design, (1) comprising a spray gun body and a liquid bottle, the spray gun body comprises a handle, a transition part, and a gun body connected in sequence from bottom to top, a muzzle is provided at the front end of the gun body, an electric air pump is provided inside the handle, a circuit board is provided inside the transition part, an electric air pump and a battery are provided inside the gun body, and a spray head extending outward is provided in the muzzle; thus, the spray gun body has two electric air pumps inside. (2) The electric air pumps of the handle and the gun body are respectively connected to the spray head through air flow pipes, the electric air pumps of the handle and the gun body are respectively electrically connected to the circuit board through wires, and the circuit board is electrically connected to the battery through wires; thus, the battery can be used to power the circuit board and the two electric air pumps, and the circuit board can be used to control the changes in the gas volume and air pressure generated by the two electric air pumps, and then the compressed gas generated by the two electric air pumps is respectively collected to the spray head through air flow pipes, and finally the spray head sprays the compressed gas outward. (3) The liquid bottle includes a bottle body and a spray needle, and the spray needle is arranged on the bottle body. When the spray head and the spray needle are close to each other, the gas sprayed by the spray head can cause negative pressure to be formed near the spray needle; therefore, when the spray head sprays compressed gas outward, since the spray head and the spray needle are close to each other, the compressed gas will form a strong airflow near the spray needle when passing near the spray needle, thereby forming a negative pressure environment near the spray needle (that is, the pressure near the spray needle is less than the internal pressure of the bottle body at this time). At this time, the liquid in the bottle (such as paint) is sprayed out through the spray needle driven by the negative pressure, and the compressed gas and the liquid are mixed and sprayed in front of the muzzle to form a mist of paint, thereby achieving the purpose of spraying. From the above analysis, it can be known that the utility model controls the changes in the amount of air and the air pressure generated by the two electric air pumps through the circuit board, so that the amount of air generated is twice that of the traditional single pump and the air pressure can be effectively increased without increasing the volume of the single electric air pump. In this way, when the spray needle is used to spray the liquid (such as paint) outward, the area of ​​the sprayed mist paint can be effectively increased, the spray atomization effect is good, and it is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a side view structural schematic diagram of the utility model from a first viewing angle;

[0017] Figure 2 It is a side view structural schematic diagram of the utility model from a second viewing angle;

[0018] Figure 3 It is a side view structural schematic diagram of the utility model at the first viewing angle when the right shell is removed;

[0019] Figure 4 It is a side view structural diagram of the left shell of the utility model from a first viewing angle;

[0020] Figure 5 It is a schematic diagram of the side view structure of the utility model when the two side shells are removed;

[0021] Figure 6 It is a three-dimensional structural schematic diagram of the liquid bottle, the connecting plate and the spray head of the utility model when they are matched;

[0022] Figure 7 It is a three-dimensional structural schematic diagram of the connecting plate of the utility model;

[0023] Figure 8 It is a three-dimensional structural schematic diagram of the liquid bottle and the spray head of the utility model when they are matched;

[0024] Fig. 9 It is a three-dimensional structural schematic diagram of the liquid bottle of the utility model without the bottle body and in cooperation with the spray head;

[0025] Fig.10 It is a three-dimensional structural schematic diagram of the liquid bottle and the bottle cap of the utility model when they are matched;

[0026] Fig.11 It is a three-dimensional structural schematic diagram of the bottle cap of the utility model;

[0027] Fig.12 It is a three-dimensional structural schematic diagram of the liquid suction pipe and the filter head of the utility model when they are matched;

[0028] Fig.13 It is a three-dimensional structural schematic diagram of the filter head of the utility model;

[0029] Fig.14 This is another three-dimensional structural schematic diagram of the filter head of the utility model;

[0030] Description of the accompanying drawings: 100 - spray gun body, 200 - liquid bottle, 300 - connecting plate, 400 - bottle cap.

[0031] 1-handle, 2-transition part, 3-gun body, 4-muzzle, 5-electric air pump, 6-circuit board, 7-battery, 8-injection head, 9-air flow duct, 10-tee pipe, 11-wire.

[0032] 401-connecting bayonet, 402-rotating shaft; 601-air pressure adjustment button, 602-gear position display light, 603-charging port, 604-press switch; 2001-bottle body, 2002-liquid cover, 2003-liquid straw, 2004-spray needle, 2005-air inlet, 2006-stirring beads, 2007-filter head, 2008-filter net, 2009-support point, 2010-liquid flow interval; 3001-mounting frame, 3002-mounting sleeve, 3003-rotating hole, 3004-gap; 4001-sealing end, 4002-sealing edge. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention, but this does not constitute a limitation on the protection scope of the present invention.

[0034] In the present invention, for a clearer description, the following explanation is made: the observer faces the attached Figure 1 For observation, the left side of the observer is set as the back, the right side of the observer is set as the front, the front of the observer is set as the left, the rear of the observer is set as the right, the top of the observer is set as the top, and the bottom of the observer is set as the bottom. It should be pointed out that the terms "front end", "rear end", "left side", "right side", "middle", "top", "bottom" and the like in the text indicate the orientation or position relationship based on the orientation or position relationship set in the drawings, which is only for the convenience of clearly describing the utility model, and does not indicate or imply that the structure or component referred to must have a specific orientation or be constructed in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third", and "fourth" are only used for the purpose of clarifying or simplifying the description, and cannot be understood as indicating or implying relative importance or quantity.

[0035] See also Figures 1 to 14The present embodiment provides a spray gun, including a spray gun body 100 and a liquid bottle 200. The spray gun body 100 includes a handle 1, a transition part 2, and a gun body 3 connected in sequence from bottom to top. A muzzle 4 is provided at the front end of the gun body 3. An electric air pump 5 is provided inside the handle 1. A circuit board 6 is provided inside the transition part 2. An electric air pump 5 and a battery 7 are provided inside the gun body 3. An air jet head 8 extending outward is provided in the muzzle 4. The electric air pumps 5 of the handle 1 and the gun body 3 are respectively connected to the air jet head 8 through an air flow duct 9. The electric air pumps 5 of the handle 1 and the gun body 3 are respectively electrically connected to the circuit board 6 through a wire 11. The circuit board 6 is electrically connected to the battery 7 through the wire 11. The liquid bottle 200 includes a bottle body 2001 and a spray needle 2004. The spray needle 2004 is arranged on the bottle body 2001. When the spray head 8 and the spray needle 2004 are close to each other, the gas sprayed by the spray head 8 can cause a negative pressure to be formed near the spray needle 2004. Function: (1) The spray gun body and the liquid bottle are included. The spray gun body includes a handle, a transition part, and a gun body connected in sequence from bottom to top. The front end of the gun body is provided with a muzzle, the handle is provided with an electric air pump, the transition part is provided with a circuit board, the gun body is provided with an electric air pump and a battery, and the muzzle is provided with an outwardly extending jet head; thus, the spray gun body has two electric air pumps. (2) The electric air pumps of the handle and the gun body are respectively connected to the jet head through airflow pipes, the electric air pumps of the handle and the gun body are respectively electrically connected to the circuit board through wires, and the circuit board is electrically connected to the battery through wires; thus, the battery can be used to power the circuit board and the two electric air pumps, and the circuit board can be used to control the changes in the amount of gas and the air pressure generated by the two electric air pumps. Then, the compressed gas generated by the two electric air pumps is respectively collected to the jet head through airflow pipes, and finally the jet head sprays the compressed gas outward. (3) The liquid bottle includes a bottle body and a spray needle, and the spray needle is arranged on the bottle body. When the spray head and the spray needle are close to each other, the gas sprayed by the spray head can cause negative pressure to be formed near the spray needle; therefore, when the spray head sprays compressed gas outward, since the spray head and the spray needle are close to each other, the compressed gas will form a strong airflow near the spray needle when passing near the spray needle, thereby forming a negative pressure environment near the spray needle (that is, the pressure near the spray needle is less than the internal pressure of the bottle body at this time). At this time, the liquid in the bottle (such as paint) is sprayed out through the spray needle driven by the negative pressure, and the compressed gas and the liquid are mixed and sprayed in front of the muzzle to form a mist of paint, thereby achieving the purpose of spraying. From the above analysis, it can be known that the utility model controls the changes in the amount of air and the air pressure generated by the two electric air pumps through the circuit board, so that the amount of air generated is twice that of the traditional single pump and the air pressure can be effectively increased without increasing the volume of the single electric air pump. In this way, when the spray needle is used to spray the liquid (such as paint) outward, the area of ​​the sprayed mist paint can be effectively increased, the spray atomization effect is good, and it is easy to use.In actual work, the voltage input to the motor of the electric air pump can be controlled by the program written on the circuit board to change the motor speed to control the changes in the amount of air and the air pressure generated by the air pump.

[0036] Specifically, the circuit board 6 is electrically connected with an air pressure regulating button 601, and the air pressure regulating button 601 can be moved outward through the outer surface of the transition part 2; when the air pressure regulating button 601 is pressed, it can switch to different gears of the working air pressure of the electric air pump 5. Function: Through the setting of the air pressure regulating button 601, it is possible to switch to different gears of air pressure as needed. In actual work: when the air pressure regulating button 601 is long pressed, the gear of the air pressure will be adjusted cyclically between multiple gears (such as four gears), and the gear will be set to the gear when it is released. The gear can have a memory function, so that after shutting down and restarting, it will automatically enter the previous gear.

[0037] Specifically, the circuit board 6 is also electrically connected to a plurality of gear display lights 602, which extend outward through the outer surface of the transition portion 2, and can display different gears of the working air pressure of the electric air pump 5. Function: By setting the plurality of gear display lights 602, it is possible to display which gear of the air pressure of the electric air pump 5 is in, so as to facilitate use.

[0038] Specifically, the circuit board 6 is also electrically connected to a charging port 603, which passes through the outer surface of the transition portion 2; when the charging port 603 is plugged into a charging cable for charging, a plurality of gear display lights 602 can also display different gears of the amount of electricity charged into the battery 7. Function: Through the setting of a plurality of gear display lights 602, when charging is performed using the charging port 603, it can be displayed at which gear the amount of electricity stored in the battery 7 is located, thereby facilitating the user to judge the remaining amount of electricity in the battery.

[0039] Specifically, the circuit board 6 is also electrically connected to a push switch 604, which can move outward through the outer surface of the transition portion 2, and can control the start and stop of the spray gun body. Function: Press the push switch 604 once to start the spray gun body, and press it again to turn off the spray gun body; or it can be set to start by long pressing and stop by releasing, so as to facilitate the use of the spray gun switch.

[0040] In actual work: 1. Long press the push switch 604 to start spraying, and the air pressure level will be displayed at the same time. Release the push switch 604 to stop. 2. In the spraying state, short press the air pressure adjustment button 601 to switch between 1.2.3.4. levels. After setting a level, the next time you turn on the machine, it will default to the last set level. 3. Insert the charging cable to display the amount of power charged, such as 25% with one light flashing, 50% with two lights and the second light flashing, 75% with three lights and the third light flashing. When fully charged, all four lights are always on. You can spray while charging. 4. In the off state, short press the air pressure adjustment button 601 to switch between 1.2.3.4. levels. After setting a level, the next time you turn on the machine, it will default to the last set level. If no operation is performed, the light will go out after 5 seconds.

[0041] Specifically, a three-way pipe 10 is further provided inside the gun body 3, and the handle 1 and the electric air pump 5 of the gun body 3 are respectively connected to the two pipe openings of the three-way pipe 10 through the airflow pipe 9, and the spray head 8 is connected to the other pipe opening of the three-way pipe 10 through the airflow pipe 9. Function: Through the setting of the three-way pipe 10, it is convenient for the airflows of the two electric air pumps 5 to converge to the spray head 8.

[0042] Preferably, the electric air pump 5 is a DC vacuum air pump, and the charging port 603 is a USB charging port.

[0043] Specifically, the liquid bottle 200 is detachably mounted below the muzzle 4, the top of the bottle body 2001 is threadedly connected with a liquid cover 2002, the bottom of the liquid cover 2002 is provided with a liquid suction tube 2003 extending into the bottle body 2001, the top of the liquid cover 2002 is threadedly connected with a spray needle 2004, the top edge of the liquid cover 2002 is provided with an air inlet 2005, and the air inlet 2005 is communicated with the bottle body 2001. Function: the liquid bottle 200 can be disassembled first, and then the liquid cover 2002 is removed, and new liquid is loaded into the bottle body 2001, and then the liquid cover 2002 is installed on the top of the bottle body 2001, and the liquid bottle 200 is reinstalled below the muzzle 4. During operation, the liquid in the bottle 2001 is driven by negative pressure to flow upward through the liquid suction pipe 2003 to the spray needle 2004 for spraying, and the air inlet 2005 can replenish air in the bottle 2001. Since the spray needle 2004 is detachable, spray needles of different calibers (such as 0.3mm, 0.5mm, 0.8mm, 1.2mm) can be replaced on the top of the liquid cover 2002 according to different needs. The spray gun body can also cooperate with spray needles of different calibers to control the amount of liquid sprayed.

[0044] Specifically, the gun body 3 extends forward and upward, the liquid bottle 200 extends forward and upward, the angle between the air jet head 8 and the spray needle 2004 is acute, the bottom end of the muzzle 4 is provided with a connecting bayonet 401, and a connecting plate 300 is provided in the connecting bayonet 401; a mounting frame 3001 is provided at the upper rear end of the connecting plate 300, and a mounting sleeve 3002 is provided at the lower front end of the connecting plate 300, the mounting frame 3001 is assembled in the muzzle 4, the air jet head 8 passes through the mounting frame 3001, the mounting sleeve 3002 is threadedly connected to the top of the liquid cover 2002, the spray needle 2004 passes through the mounting sleeve 3002 upward, and a gap 3004 is left between the air inlet 2005 and the mounting sleeve 3002. Function: The angle between the jet head 8 and the spray needle 2004 is acute, so that the negative pressure between the two and the spraying effect of the liquid material are better; and the setting of the connecting plate 300 enables the spray gun body and the liquid bottle 200 to be detachably connected, and the setting of the gap facilitates the air inlet 2005 to replenish air into the bottle body. As a preferred embodiment, after assembly, the air outlet of the jet head 8 and the needle mouth of the spray needle 2004 should be on the same straight line, that is, the needle mouth of the spray needle 2004 is located on the axial center line of the air outlet of the jet head 8, rather than the needle mouth of the spray needle 2004 being higher or lower than the axial center line of the air outlet of the jet head 8. In this way, the effect of forming a negative pressure environment on the top of the spray needle 2004 is best.

[0045] Specifically, a rotation hole 3003 is provided in the middle of the connecting plate 300, and a rotating shaft 402 extending axially left and right is provided in the connecting bayonet 401. The rotation hole 3003 and the rotating shaft 402 are rotated to adjust the rotation angle of the connecting plate 300; the shell of the spray gun body 100 is formed by two half shells on the left and right sides locked by screws, and the connecting plate 300 can be locked and fixed; the shell of the spray gun body 100 and the connecting plate 300 are respectively set as shell plastic and plastic plate, and the hardness of the shell plastic is lower than the hardness of the plastic plate. Function: After the rotation angle of the connecting plate 300 is adjusted, the angle between the jet head 8 and the spray needle 2004 is optimal at this time, and the two half shells are locked by screws, so as to lock and fix the connecting plate 300. The hardness of the shell plastic (such as nylon material) is lower than the hardness of the plastic plate (such as pom material), so that the installation stability of the liquid bottle 200 is improved while facilitating the production of the shell of the spray gun body 100, thereby improving the working quality of the spray gun.

[0046] Specifically, the spray gun also includes a bottle cap 400. When the mounting sleeve 3002 is detached from the liquid cover 2002, the bottle cap 400 can be threadedly connected to the top of the liquid cover 2002. The top of the bottle cap 400 has a sealing end 4001, and the bottom edge of the bottle cap 400 is provided with a sealing edge 4002. The sealing end 4001 and the sealing edge 4002 can respectively seal the spray needle 2004 and the air inlet 2005. A stirring bead 2006 is provided in the bottle body 2001. The bottom end of the liquid suction pipe 2003 is connected to the top end of the filter head 2007. A filter net 2008 is provided in the middle of the bottom end of the filter head 2007. A plurality of supporting points 2009 are provided on the bottom edge of the filter head 2007, and a liquid flow interval 2010 is provided between two adjacent supporting points 2009. Function: When spraying is required, unscrew the bottle cap, screw the liquid bottle 200 upward into the screw port of the spray gun mounting sleeve 3002, and confirm that it has been tightened in place; after use, screw the liquid bottle 200 downward out of the screw port of the spray gun mounting sleeve 3002, and use the bottle cap 400 to thread the top of the liquid cover 2002 to seal the inside of the bottle. The setting of the stirring bead 2006 allows the bottle to be shaken for 1 minute before use to mix the liquid evenly, and the stirring bead 2006 can improve the stirring effect. Through the setting of the filter head 2007, several supporting points 2009 can be used to counter the inner bottom surface of the bottle body 2001, and the liquid can pass through the liquid flow interval 2010, the filter net 2008, and the middle of the filter head 2007 in sequence, and then enter the liquid pipette 2003 upward, so that the liquid can be filtered while the liquid in the bottle body 2001 is sucked away as much as possible to reduce residual liquid.

[0047] In actual use: 1. The feed liquid (such as paint) is placed in a tightly sealed feed liquid bottle 200; 2. The feed liquid bottle 200 is shaken, and the stirring beads 2006 stir the feed liquid evenly; 3. The bottle cap 400 is unscrewed and placed aside; 4. The mounting sleeve 3002 is threadedly connected to the top of the feed liquid cover 2002, and the spray needle 2004 passes through the mounting sleeve 3002 upward, and a gap 3004 is left between the air inlet 2005 and the mounting sleeve 3002; 5. The push switch 604 is pressed to turn on the spray gun; 6. The air pressure adjustment button 601 is pressed once or multiple times to adjust the spray pressure of the spray gun to the required gear; 7. The gas ejected from the air jet head 8 causes a negative pressure to be formed above the spray needle 2004; 8. The spray needle sprays the feed liquid upward, and the compressed gas and the feed liquid are mixed and sprayed in front of the muzzle to form a mist of paint, thereby completing the spraying purpose.

[0048] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the protection scope of the present invention.

Claims

1. A spray gun, comprising a spray gun body (100) and a liquid bottle (200), characterized in that: The spray gun body (100) comprises a handle (1), a transition part (2), and a gun body (3) which are connected in sequence from bottom to top; a muzzle (4) is provided at the front end of the gun body (3); an electric air pump (5) is provided inside the handle (1); a circuit board (6) is provided inside the transition part (2); an electric air pump (5) and a storage battery (7) are provided inside the gun body (3); and a spray head (8) extending outward is provided in the muzzle (4); the handle (1) and the electric air pump (5) of the gun body (3) are respectively connected to the spray head (8) through an airflow pipe (9); The handle (1) and the electric air pump (5) of the gun body (3) are electrically connected to the circuit board (6) through a wire (11), and the circuit board (6) is electrically connected to the battery (7) through a wire (11); the liquid bottle (200) comprises a bottle body (2001) and a spray needle (2004), and the spray needle (2004) is arranged on the bottle body (2001); when the spray head (8) and the spray needle (2004) are close to each other, the gas sprayed by the spray head (8) can cause negative pressure to be formed near the spray needle (2004).

2. A spray gun according to claim 1, characterized in that: The circuit board (6) is electrically connected to an air pressure regulating button (601), and the air pressure regulating button (601) can move outward through the outer surface of the transition portion (2); When the air pressure adjustment button (601) is pressed, the electric air pump (5) can be switched to different gears of the working air pressure.

3. A spray gun according to claim 2, characterized in that: The circuit board (6) is also electrically connected to a plurality of gear display lights (602), which extend outward through the outer surface of the transition portion (2). The plurality of gear display lights (602) can display different gears of the working air pressure of the electric air pump (5).

4. A spray gun according to claim 3, characterized in that: The circuit board (6) is also electrically connected to a charging port (603), and the charging port (603) passes outward through the outer surface of the transition portion (2); when a charging cable is inserted into the charging port (603) for charging, the plurality of gear display lights (602) can also display different gears of the amount of electricity charged to the storage battery (7).

5. A spray gun according to any one of claims 1 to 4, characterized in that: The circuit board (6) is also electrically connected to a push switch (604), and the push switch (604) can move outward through the outer surface of the transition portion (2). The push switch (604) can control the start and stop of the spray gun body.

6. A spray gun according to any one of claims 1 to 4, characterized in that: A three-way pipe (10) is also provided inside the gun body (3); the handle (1) and the electric air pump (5) of the gun body (3) are respectively connected to two pipe openings of the three-way pipe (10) through an airflow pipe (9); and the spray head (8) is connected to the other pipe opening of the three-way pipe (10) through an airflow pipe (9).

7. A spray gun according to any one of claims 1 to 4, characterized in that: The liquid bottle (200) is detachably mounted below the muzzle (4); the top of the bottle body (2001) is threadedly connected to a liquid cover (2002); the bottom of the liquid cover (2002) is provided with a liquid suction tube (2003) extending into the bottle body (2001); the top of the liquid cover (2002) is threadedly connected to the spray needle (2004); the top edge of the liquid cover (2002) is provided with an air inlet (2005); and the air inlet (2005) is communicated with the bottle body (2001).

8. A spray gun according to claim 7, characterized in that: The gun body (3) extends forward and upward, the liquid bottle (200) extends forward and upward, the angle between the air jet head (8) and the spray needle (2004) is an acute angle, the bottom end of the muzzle (4) is provided with a connecting bayonet (401), and a connecting plate (300) is provided in the connecting bayonet (401); a mounting frame (3001) is provided at the upper rear end of the connecting plate (300), and a mounting sleeve (3002) is provided at the lower front end of the connecting plate (300), the mounting frame (3001) is assembled in the muzzle (4), the air jet head (8) passes through the mounting frame (3001), the mounting sleeve (3002) is threadedly connected to the top of the liquid cover (2002), the spray needle (2004) passes through the mounting sleeve (3002) upward, and a gap (3004) is left between the air inlet (2005) and the mounting sleeve (3002).

9. A spray gun according to claim 8, characterized in that: A rotating hole (3003) is provided in the middle of the connecting plate (300), and a rotating shaft (402) extending axially to the left and right is provided in the connecting bayonet (401), and the rotating hole (3003) and the rotating shaft (402) are rotatably matched to adjust the rotation angle of the connecting plate (300); the outer shell of the spray gun body (100) is formed by two left and right half shells locked by screws, and the connecting plate (300) can be locked and fixed; the outer shell of the spray gun body (100) and the connecting plate (300) are respectively set as outer shell plastic and plastic plate, and the hardness of the outer shell plastic is lower than the hardness of the plastic plate.

10. A spray gun according to claim 8 or 9, characterized in that: The spray gun further comprises a bottle cap (400), and when the mounting sleeve (3002) is detached from the liquid feed cover (2002), the bottle cap (400) can be threadedly connected to the top of the liquid feed cover (2002); the top of the bottle cap (400) has a sealing end (4001), and the bottom edge of the bottle cap (400) is provided with a sealing edge (4002), and the sealing end (4001) and the sealing edge (4002) can respectively seal the spray needle (2004) and the liquid feed cover (2002). The bottle body (2001) is sealed with the air inlet hole (2005), a stirring bead (2006) is arranged in the bottle body (2001), the bottom end of the liquid suction tube (2003) is connected to the top end of the filter head (2007), a filter net (2008) is arranged in the middle of the bottom end of the filter head (2007), a plurality of supporting points (2009) are arranged on the bottom edge of the filter head (2007), and a liquid flow interval (2010) is arranged between two adjacent supporting points (2009).

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