Flow-adjustable spray gun

Abstract

The utility model discloses a flow-adjustable spray gun, and relates to the technical field of spray guns, the flow-adjustable spray gun comprises a gun body, one end of the gun body is provided with a nozzle, the gun body is internally provided with a first fluid channel communicated with the nozzle, the first fluid channel is internally provided with a valve needle, and the gun body is provided with a wrench linked with the valve needle; the wrench is stressed to drive the valve needle to slide back and forth in the first fluid channel so as to adjust the opening size of the nozzle, the gun body is provided with a flow adjusting assembly, the flow adjusting assembly comprises an adjusting switch and a linkage piece, a gear and rack transmission structure is arranged between the adjusting switch and the linkage piece, and the valve needle is provided with a limiting cavity connected with the linkage piece. The adjusting switch drives the linkage piece to slide in the limiting cavity through the gear and rack transmission structure, so that the sliding range of the valve needle in the first fluid channel is adjusted, the stroke range of the valve needle is large, the flow adjusting range is large, and practicability is better.

Description

Technical Field

[0001] The present application relates to the technical field of spray guns, and more specifically to a spray gun with adjustable flow rate. Background Art

[0002] A spray gun is a device that uses liquid or compressed air to release quickly as power. It is usually used as a tool for spraying liquid or paint, and can spray liquid or paint from a nozzle. Most current spray guns have a material pot at the lower end. External air pressure enters the gun body and the material pot, thereby generating pressure in the material pot, and then is pressed into the liquid channel through the straw channel. The liquid channel is provided with a valve needle and a nozzle at the front end of the valve needle. The valve needle spring at the rear end of the valve needle is pre-tightened and sealed. The rear end of the valve needle is provided with a sealing structure. The rear end of the valve needle is provided with a fulcrum to be pulled. The front end of the valve needle and the nozzle are pre-tightened and sealed. The nozzle mouth is opened by moving the valve needle. A wrench is provided on the outside of the gun body. The upper turning point of the wrench is fixed to the outside of the gun body. A linkage point for pulling the valve needle is provided in the middle. A force point is provided at the bottom of the wrench. The three parts of the wrench form a lever-type force arm. The valve needle can move and open the nozzle mouth by linkage with the wrench. For example, the utility model patent with publication number: CN220759633U includes a gun body, a clamping nut, a clamping nut, a accommodating chamber, a nozzle, an atomizing air cap, a valve needle, a valve needle spring, and a wrench. A liquid internal passage is provided in the accommodating chamber, the valve needle is provided at the lower part of the liquid internal passage, a limit surface for adjusting the flow is provided in the middle of the valve needle, an adjusting screw is provided at the upper part of the liquid internal passage vertically arranged with the valve needle, an adjusting surface corresponding to the limit surface is provided at the lower end of the adjusting screw, and an adjusting knob is threadedly connected to the upper end of the adjusting screw; in this technical solution, the adjusting screw is moved up and down to make the adjusting surface move and contact with the inclined surface of the limit surface of the valve needle, so as to push the limit surface and the valve needle to move out laterally, or cooperate with the valve needle spring to make the limit surface and the valve needle return laterally, so as to achieve the function of adjusting the opening stroke size of the valve needle, but the opening stroke range of the valve needle is limited by the size of the inclined surface, and the lateral size of the inclined surface is small, so that the opening stroke range of the valve needle is small, so the flow adjustable range is small, and the actual use limitation is large. Utility Model Content

[0003] The technical problem to be solved by the present application is to provide a flow-adjustable spray gun, which controls the flow adjustment range through a gear rack transmission structure, so that the valve needle has a larger stroke range, a larger flow adjustable range, and better practicality.

[0004] The present application provides a flow-adjustable spray gun, comprising a gun body, a nozzle being provided at one end of the gun body, a first fluid channel connected to the nozzle being provided within the gun body, a valve needle being installed in the first fluid channel, a wrench linked to the valve needle being installed on the gun body, the wrench being subjected to force to drive the valve needle to slide back and forth in the first fluid channel to adjust the size of the nozzle opening, the gun body being provided with a flow regulating assembly, the flow regulating assembly comprising an adjusting switch and a linkage part, a gear rack transmission structure being provided between the adjusting switch and the linkage part, the valve needle being provided with a limiting cavity connected to the linkage part, the adjusting switch driving the linkage part to slide in the limiting cavity through the gear rack transmission structure, thereby adjusting the sliding range of the valve needle in the first fluid channel.

[0005] In the present technical solution, a nozzle is installed at one end of a gun body, and the other end of the gun body is an air inlet, and a first fluid channel is arranged in the gun body. Liquid or paint is atomized and sprayed out from the nozzle through the first fluid channel. A valve needle is arranged in the first fluid channel, and the valve needle can open and close the nozzle by sliding back and forth, and the valve needle controls the size of the nozzle opening by sliding to adjust the flow rate. A wrench linked to the valve needle is installed on the gun body, and force is applied to the wrench to drive the valve needle to slide back and forth in the first fluid channel, which is more labor-saving and comfortable to use. A flow regulating component is arranged on the gun body, and the flow regulating component is composed of an adjusting switch and a linkage part. The adjusting switch and the linkage part are linked by a gear rack transmission structure. The adjusting switch is subjected to force through the gear rack transmission structure to drive the linkage part to slide back and forth along the length direction of the gun body. A limit cavity is arranged on the valve needle, and one end of the linkage part is connected to the adjusting switch The transmission cooperates, and the other end of the linkage cooperates with the limit cavity. The valve needle abuts against the linkage through the two ends of the limit cavity to achieve the maximum sliding stroke, thereby limiting the flow adjustment range. The linkage adjusts its position in the limit cavity by sliding, so that the sliding stroke range of the valve needle is adjustable. Compared with the inclined adjustment method of the comparative document, the lateral dimension of the rack and pinion transmission structure of this scheme is larger, so that the sliding stroke range of the valve needle is larger, the flow adjustable range is larger, and the practicality is better. On the other hand, the length of the rack and pinion transmission structure is close to the length of the limit cavity. Therefore, the rack and pinion transmission structure does not increase the size of the gun body, and the spatial distribution is more reasonable. In addition, the rack and pinion transmission structure makes the adjustment controllable, and the position adjustment of the linkage is more precise, thereby making the flow regulation more precise. The specific structure of the limit cavity in this scheme includes but is not limited to through holes and grooves.

[0006] As an improvement, the gear rack transmission structure includes a gear arranged on the adjustment switch and a rack arranged on the linkage member, and the gear is meshed with the rack. In this technical solution, by arranging a gear on the adjustment switch and a rack on the linkage member, the gear and the rack are meshed to form a gear rack transmission structure, which has a simple and compact structure and efficient transmission. On the other hand, the length of the gear rack transmission structure depends on the length of the rack, and the rack is distributed in parallel with the limit cavity, so the overall structure is more compact, and has less impact on the lateral size of the installation space, and the spatial distribution is more reasonable.

[0007] As an improvement, the adjustment switch is rotatably mounted on the top of the gun body, the gear is arranged at the bottom of the adjustment switch and is located in the gun body, a receiving groove is arranged at the top of the linkage, the gear is accommodated in the receiving groove, and the rack is arranged on the inner wall of the receiving groove. In this technical solution, the adjustment switch is rotatably arranged at the top of the gun body, the operation space of the adjustment switch is larger, the user is not interfered with by other components when applying force to the adjustment switch, the adjustment is smoother and more convenient, the adjustment switch is rotated under force to drive the gear at the bottom to rotate synchronously, the rotation adjustment is more labor-saving, and the gear rotation efficiency is higher. By arranging a receiving groove capable of accommodating the gear at the top of the linkage, and the rack is arranged on the inner wall of the receiving groove, the gear can be inserted into the receiving groove vertically and can directly mesh with the rack, which is not only simple and labor-saving to assemble, but also has reasonable spatial distribution, and the overall structure is compact and reliable.

[0008] As an improvement, a mounting seat adapted to the regulating switch is provided at the top of the gun body, the regulating switch is rotatably connected to the mounting seat, a convex ring is provided on the side wall of the mounting seat, and an undercut adapted to the convex ring is provided on the inner wall of the regulating switch, and the undercut is connected to the convex ring to position the upper and lower limits of the regulating switch on the mounting seat. In this technical solution, a mounting seat is provided at the top of the gun body to rotatably mount the regulating switch, a convex ring is provided on the side wall of the mounting seat, and an undercut is provided on the inner wall of the regulating switch, and the regulating switch is vertically mounted on the mounting seat so that the convex ring and the undercut are connected to limit the position, which can prevent the regulating switch from being separated from the mounting seat up and down, and the installation is simple and reliable, and the undercut is directly provided on the inner wall of the regulating switch, and the structure is simple.

[0009] As an improvement, the mounting seat is provided with a first through hole for the gear to pass through, and the gear passes through the first through hole to connect to the rack. In this technical solution, the gear is arranged at the bottom of the adjustment switch, and the first through hole is arranged at the center of the mounting seat for the gear to pass through. The adjustment switch is vertically mounted on the mounting seat, and the gear passes through the first through hole vertically to connect to the rack so that the adjustment switch and the linkage member are linked, which has a simple and compact structure and saves labor for assembly.

[0010] As an improvement, the top of the gun body is provided with a mounting port adapted to the mounting seat, the mounting port is provided with a limiting protrusion, the mounting seat is provided with a second through hole adapted to the limiting protrusion, and the limiting protrusion is connected to the second through hole to limit the rotation of the mounting seat in the mounting port. In this technical solution, by providing a mounting port on the top of the gun body to install the mounting seat, by providing a limiting protrusion on the mounting port and providing a second through hole on the mounting seat, the limiting protrusion is inserted into the second through hole to limit the rotation of the mounting seat, thereby avoiding the relative idling of the mounting seat and the adjusting knob, so that the installation stability of the adjusting knob is higher and the rotation efficiency of the adjusting knob is higher.

[0011] As an improvement, a through hole structure is provided on the valve needle, and the bottom end of the linkage member is movably installed in the through hole structure, and the through hole structure is the limit cavity. In this technical solution, the limit cavity is provided as a through hole structure on the valve needle, and the through hole structure is used to movably install the bottom end of the linkage member, which has a simple structure and reliable matching.

[0012] As an improvement, the wrench is rotatably mounted on the gun body, a connecting rod is provided between the valve needle and the wrench, the valve needle is linked to the wrench through the connecting rod, and the wrench is rotated by force to drive the valve needle to slide back and forth in the first fluid channel through the connecting rod. In this technical solution, the wrench is rotatably connected to the gun body, and the wrench is rotated around the gun body by force. By providing a connecting rod between the valve needle and the wrench, the connecting rod passes through the valve needle and is connected to the wrench, thereby linking the valve needle and the wrench, and the wrench rotates to drive the valve needle to slide through the connecting rod. The linkage structure is simple and efficient.

[0013] As an improvement, the side wall of the gun body is provided with a first slide groove adapted to the connecting rod, the wrench is provided with a connecting hole adapted to the connecting rod, and the end of the connecting rod passes through the first slide groove and is connected to the connecting hole. In this technical solution, by providing a first slide groove for the connecting rod to pass through on the side wall of the gun body, and providing a connecting hole on the wrench, the connecting rod is installed on the valve needle, and the end of the connecting rod passes through the first slide groove and is inserted into the connecting hole. The wrench is driven by force to drive the connecting rod to slide in the first slide groove, thereby driving the valve needle to slide. The transmission structure is simple, and the sliding is efficient and reliable.

[0014] As an improvement, the bottom of the gun body is detachably connected to a material pot, and a second fluid channel connected to the first fluid channel is provided in the material pot. In this technical solution, the gun body is detachably connected to the material pot, and the material pot is used to hold liquid or paint. When the liquid or paint in the material pot is used up, it can be disassembled and replenished, thereby improving the utilization rate of the gun body. The material pot is connected to the first fluid channel through the second fluid channel, and the liquid or paint in the material pot is input into the first fluid channel through the second fluid channel, and the flow is smooth and efficient.

[0015] As an improvement, the gun body is provided with a base adapted to the opening of the material pot, the base is threadedly connected to the material pot, and the bottom of the wrench is provided with an avoidance recess adapted to the base. In this technical solution, a base is provided on the gun body, and the base is covered with the opening of the material pot, and the base is threadedly connected to the material pot to realize a detachable connection between the gun body and the material pot. The threaded structure is simple and reliable; on the other hand, the wrench is rotatably installed on the side of the gun body away from the nozzle, and the grip of the wrench is C-shaped, which is more suitable for ergonomic design, and the user is more comfortable and labor-saving to hold. The longer the length of the wrench, the more labor-saving the user is to use. The maximum lever arm that the wrench can reach is that the bottom of the wrench is flush with the base. By providing an avoidance recess at the bottom of the wrench to avoid the base, the wrench not only reaches the maximum lever arm but is not interfered by the base, and the structural design is more ingenious and reasonable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional structural schematic diagram of a flow-adjustable spray gun according to the present application.

[0017] Figure 2 An exploded view of a flow-adjustable spray gun for this application.

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure of the flow regulating component in this application.

[0019] Figure 4 This is a cross-sectional schematic diagram of a flow-adjustable spray gun according to the present application.

[0020] Figure 5 For this application Figure 4 A local enlarged schematic diagram of point A in the middle.

[0021] Figure 6 An exploded view of the adjustment switch, mount and linkage in this application.

[0022] Figure 7 It is a schematic diagram of the three-dimensional structure of the gun body in this application.

[0023] As shown in the figure: 1. gun body; 11. first fluid channel; 12. mounting port; 121. limiting protrusion; 13. first slide groove; 14. base; 2. nozzle; 3. valve needle; 31. limiting cavity; 32. connecting rod; 4. wrench; 41. connecting hole; 42. avoidance recess; 5. flow regulating assembly; 51. regulating switch; 511. gear; 512. undercut; 52. linkage member; 521. rack; 522. accommodating groove; 6. mounting seat; 61. convex ring; 62. first through hole; 63. second through hole; 7. material pot; 71. second fluid channel. DETAILED DESCRIPTION

[0024] In order to better understand the present application, a more detailed description of various aspects of the present application will be made with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and do not limit the scope of the present application in any way. Throughout the specification, the same figure numerals refer to the same elements.

[0025] In the drawings, the thickness, size and shape of objects have been slightly exaggerated for ease of explanation. The drawings are only examples and are not drawn strictly to scale.

[0026] It should also be understood that the terms “comprises,” “including,” “has,” “contains,” and “comprising,” when used in this specification, indicate the presence of the described features, integers, steps, operations, elements, and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, and / or combinations thereof.

[0027] like Figures 1 to 7 As shown, the present application discloses a flow-adjustable spray gun, comprising a gun body 1, a nozzle 2 is arranged at one end of the gun body 1, a first fluid channel 11 connected to the nozzle 2 is arranged in the gun body 1, a valve needle 3 is installed in the first fluid channel 11, a wrench 4 linked with the valve needle 3 is installed on the gun body 1, the wrench 4 is driven by force to drive the valve needle 3 to slide back and forth in the first fluid channel 11 to adjust the opening size of the nozzle 2, a nozzle 2 is installed at one end of the gun body 1, and the other end of the gun body 1 is an air inlet, a first fluid channel 11 is arranged in the gun body 1, liquid or paint is sprayed out in atomization through the first fluid channel 11 to the nozzle 2, a valve needle 3 is arranged in the first fluid channel 11, the valve needle 3 can open and close the nozzle 2 by sliding back and forth, and the valve needle 3 controls the size of the nozzle 2 opening by sliding to adjust the flow size, a wrench 4 linked with the valve needle 3 is installed on the gun body 1, and force is applied to the wrench 4 to drive the valve needle 3 to slide back and forth in the first fluid channel 11, which is more labor-saving and comfortable to use;

[0028] The gun body 1 is provided with a flow regulating component 5, and the flow regulating component 5 includes a regulating switch 51 and a linkage member 52. A gear rack transmission structure is provided between the regulating switch 51 and the linkage member 52. The valve needle 3 is provided with a limit cavity 31 connected to the linkage member 52. The regulating switch 51 drives the linkage member 52 to slide in the limit cavity 31 through the gear rack transmission structure, so as to adjust the sliding range of the valve needle 3 in the first fluid channel 11. By arranging the flow regulating component 5 on the gun body 1, the flow regulating component 5 is composed of the regulating switch 51 and the linkage member 52. The regulating switch 51 and the linkage member 52 are linked by the gear rack transmission structure. The regulating switch 51 is subjected to force through the gear rack transmission structure to drive the linkage member 52 to slide back and forth along the length direction of the gun body 1. By arranging the limit cavity 31 on the valve needle 3, one end of the linkage member 52 is driven and matched with the regulating switch 51 The other end of the linkage member 52 cooperates with the limit cavity 31, and the valve needle 3 abuts against the linkage member 52 at both ends of the limit cavity 31 to achieve the maximum sliding stroke, thereby limiting the flow adjustment range. The linkage member 52 adjusts its position in the limit cavity 31 by sliding, so that the sliding stroke range of the valve needle 3 is adjustable. Compared with the inclined adjustment method of the comparative document, the lateral dimension of the gear rack transmission structure of this scheme is larger, so that the sliding stroke range of the valve needle 3 is larger, the flow adjustable range is larger, and the practicality is better. On the other hand, the length of the gear rack transmission structure is close to the length of the limit cavity 31, so the gear rack transmission structure does not increase the size of the gun body 1, the spatial distribution is more reasonable, and the gear rack transmission structure makes the adjustment controllable, and the position adjustment of the linkage member 52 is more precise, thereby making the flow regulation more precise.

[0029] More specifically, Figure 2 and Figure 3 As shown, the rack and pinion transmission structure includes a gear 511 arranged on the adjustment switch 51 and a rack 521 arranged on the linkage member 52, and the gear 511 is meshed with the rack 521. By arranging the gear 511 on the adjustment switch 51 and the rack 521 on the linkage member 52, the gear 511 is meshed with the rack 521 to form a rack and pinion transmission structure, which has a simple and compact structure and efficient transmission. On the other hand, the length of the rack and pinion transmission structure depends on the length of the rack 521. The rack 521 is distributed in parallel with the limiting cavity 31, and the overall structure is more compact, and has less influence on the lateral size of the installation space, and the spatial distribution is more reasonable.

[0030] More specifically, Figures 1 to 5As shown, the adjustment switch 51 is rotatably mounted on the top of the gun body 1, the gear 511 is arranged at the bottom of the adjustment switch 51 and is located in the gun body 1, and a receiving groove 522 adapted to the gear 511 is arranged on the top of the linkage member 52, the gear 511 is accommodated in the receiving groove 522, and the rack 521 is arranged on the inner wall of the receiving groove 522. The adjustment switch 51 is rotatably arranged on the top of the gun body 1, and the operation space of the adjustment switch 51 is large. When the user applies force to the adjustment switch 51, there is no interference from other components, and the adjustment It is smoother and more convenient. The adjustment switch 51 is rotated under force to drive the gear 511 at the bottom to rotate synchronously. The rotation adjustment is more labor-saving and the rotation efficiency of the gear 511 is higher. By setting a receiving groove 522 that can accommodate the gear 511 on the top of the linkage member 52, the rack 521 is set on the inner wall of the receiving groove 522, so that the gear 511 can be vertically inserted into the receiving groove 522 and can directly engage with the lateral rack 521. Not only is the assembly simple and labor-saving, but the spatial distribution is reasonable, and the overall structure is compact and reliable.

[0031] More specifically, Figure 2 , Figure 4 and Figure 5 As shown, a mounting seat 6 adapted to the adjustment switch 51 is provided on the top of the gun body 1, the adjustment switch 51 is rotatably connected to the mounting seat 6, a convex ring 61 is provided on the side wall of the mounting seat 6, and an undercut 512 adapted to the convex ring 61 is provided on the inner wall of the adjustment switch 51, the undercut 512 is connected with the convex ring 61 to position the upper and lower limits of the adjustment switch 51 on the mounting seat 6, and the adjustment switch 51 is rotatably installed by providing the mounting seat 6 on the top of the gun body 1, and the convex ring 61 is provided on the side wall of the mounting seat 6 and the undercut 512 is provided on the inner wall of the adjustment switch 51, and the adjustment switch 51 is vertically installed on the mounting seat 6 so that the convex ring 61 and the undercut 512 are snap-connected and limited, which can prevent the adjustment switch 51 from being separated from the mounting seat 6 up and down, and the installation is simple and reliable, and the undercut 512 is directly provided on the inner wall of the adjustment switch 51, and the structure is simple.

[0032] More specifically, Figure 2 , Figure 4 and Figure 6 As shown, the mounting base 6 is provided with a first through hole 62 for the gear 511 to pass through, and the gear 511 passes through the first through hole 62 to connect to the rack 521. The gear 511 is arranged at the bottom of the regulating switch 51. By arranging the first through hole 62 at the center of the mounting base 6 for the gear 511 to pass through, the regulating switch 51 is vertically mounted on the mounting base 6. The gear 511 passes through the first through hole 62 vertically to connect to the rack 521 so that the regulating switch 51 is linked with the linkage member 52. The structure is simple and compact, and the assembly is labor-saving.

[0033] More specifically, Figure 2 , Figure 4 and Figure 6As shown, a mounting opening 12 adapted to the mounting seat 6 is provided at the top of the gun body 1, a limiting protrusion 121 is provided at the mounting opening 12, and the mounting seat 6 is provided with a second through hole 63 adapted to the limiting protrusion 121, and the limiting protrusion 121 is connected to the second through hole 63 to limit the rotation of the mounting seat 6 in the mounting opening 12. By providing the mounting opening 12 at the top of the gun body 1 to install the mounting seat 6, by providing the limiting protrusion 121 at the mounting opening 12 and providing the second through hole 63 on the mounting seat 6, the limiting protrusion 121 is inserted into the second through hole 63 to limit the rotation of the mounting seat 6, thereby avoiding relative idling of the mounting seat 6 and the adjusting knob, so that the installation stability of the adjusting knob is higher and the rotation efficiency of the adjusting knob is higher.

[0034] More specifically, Figure 2 , Figure 4 and Figure 5 As shown, a through hole structure is provided on the valve needle 3, and the bottom end of the linkage member 52 is movably installed in the through hole structure. The through hole structure is a limiting cavity 31. The limiting cavity 31 is set as a through hole structure on the valve needle 3. The through hole structure is used for movably installing the bottom end of the linkage member 52, and has a simple structure and reliable matching.

[0035] More specifically, Figure 2 and Figure 4 As shown, the wrench 4 is rotatably installed on the gun body 1, and a connecting rod 32 is arranged between the valve needle 3 and the wrench 4. The valve needle 3 is linked with the wrench 4 through the connecting rod 32. The wrench 4 is rotated by the force to drive the valve needle 3 to slide back and forth in the first fluid channel 11 through the connecting rod 32. The wrench 4 is rotatably connected to the gun body 1, and the wrench 4 is rotated around the gun body 1 by the force. By arranging the connecting rod 32 between the valve needle 3 and the wrench 4, the connecting rod 32 passes through the valve needle 3 and is connected with the wrench 4, thereby linking the valve needle 3 and the wrench 4. The wrench 4 rotates to drive the valve needle 3 to slide through the connecting rod 32. The linkage structure is simple and efficient.

[0036] More specifically, Figure 2 and Figure 7 As shown, the side wall of the gun body 1 is provided with a first slide groove 13 adapted to the connecting rod 32, and the wrench 4 is provided with a connecting hole 41 adapted to the connecting rod 32. The end of the connecting rod 32 passes through the first slide groove 13 and is connected to the connecting hole 41. By providing the first slide groove 13 for the connecting rod 32 to pass through the side wall of the gun body 1, and providing the connecting hole 41 on the wrench 4, the connecting rod 32 is installed on the valve needle 3, and the end of the connecting rod 32 passes through the first slide groove 13 and is inserted into the connecting hole 41. The wrench 4 is driven by force to drive the connecting rod 32 to slide in the first slide groove 13, thereby driving the valve needle 3 to slide. The transmission structure is simple and the sliding is efficient and reliable.

[0037] More specifically, Figure 2 and Figure 4As shown, the bottom of the gun body 1 is detachably connected with a material pot 7, and a second fluid channel 71 connected with the first fluid channel 11 is arranged in the material pot 7. The gun body 1 is detachably connected with the material pot 7, and the material pot 7 is used to hold liquid or paint. The liquid or paint in the material pot 7 can be disassembled and replenished when it is used up, thereby improving the utilization rate of the gun body 1. The material pot 7 is connected to the first fluid channel 11 through the second fluid channel 71, and the liquid or paint in the material pot 7 is input into the first fluid channel 11 through the second fluid channel 71, and the flow is smooth and efficient.

[0038] More specifically, Figure 2 and Figure 4 As shown, the gun body 1 is provided with a base 14 adapted to the opening of the material pot 7, the base 14 is threadedly connected to the material pot 7, and a avoidance recess 42 adapted to the base 14 is provided at the bottom of the wrench 4. The base 14 is arranged on the gun body 1, and the opening of the material pot 7 is covered by the base 14. The base 14 is threadedly connected to the material pot 7 to realize a detachable connection between the gun body 1 and the material pot 7, and the threaded structure is simple and reliable; on the other hand, the wrench 4 is rotatably installed on the side of the gun body 1 away from the nozzle 2, and the grip of the wrench 4 is C-shaped, which is more suitable for ergonomic design, and the user can hold it more comfortably and labor-saving. The longer the length of the wrench 4, the more labor-saving the user can use it. The maximum lever arm that the wrench 4 can reach is that the bottom of the wrench 4 is flush with the base 14. By arranging the avoidance recess 42 at the bottom of the wrench 4 to avoid the base 14, the wrench 4 not only reaches the maximum lever arm but is not interfered by the base 14, and the structural design is more ingenious and reasonable.

[0039] The present application is not limited to the above-mentioned optimal implementation mode. Anyone can derive other forms of products under the inspiration of the present application. However, no matter what changes are made in the shape or structure, all technical solutions that are the same or similar to those of the present application fall within the protection scope of the present application.

Claims

1. A flow-adjustable spray gun, comprising a gun body (1), one end of the gun body (1) being provided with a nozzle (2), a first fluid channel (11) being provided in the gun body (1) and being connected with the nozzle (2), a valve needle (3) being installed in the first fluid channel (11), a wrench (4) being installed on the gun body (1) and being linked with the valve needle (3), the wrench (4) being driven by force to drive the valve needle (3) to slide back and forth in the first fluid channel (11) to adjust the opening size of the nozzle (2), characterized in that: The gun body (1) is provided with a flow regulating assembly (5), and the flow regulating assembly (5) includes an adjusting switch (51) and a linkage member (52). A gear rack transmission structure is provided between the adjusting switch (51) and the linkage member (52). The valve needle (3) is provided with a limiting cavity (31) connected to the linkage member (52). The adjusting switch (51) drives the linkage member (52) to slide in the limiting cavity (31) through the gear rack transmission structure, thereby adjusting the sliding range of the valve needle (3) in the first fluid channel (11).

2. A flow-adjustable spray gun according to claim 1, characterized in that: The gear rack transmission structure comprises a gear (511) arranged on the regulating switch (51) and a rack (521) arranged on the linkage member (52); the gear (511) is meshed with the rack (521).

3. A flow-adjustable spray gun according to claim 2, characterized in that: The regulating switch (51) is rotatably mounted on the top of the gun body (1); the gear (511) is arranged at the bottom of the regulating switch (51) and is located inside the gun body (1); a receiving groove (522) is arranged at the top of the linkage member (52); the gear (511) is received in the receiving groove (522); and the rack (521) is arranged on the inner wall of the receiving groove (522).

4. A flow-adjustable spray gun according to claim 2, characterized in that: A mounting seat (6) adapted to the regulating switch (51) is arranged on the top of the gun body (1); the regulating switch (51) is rotatably connected to the mounting seat (6); a convex ring (61) is arranged on the side wall of the mounting seat (6); an undercut (512) adapted to the convex ring (61) is arranged on the inner side wall of the regulating switch (51); the undercut (512) is connected to the convex ring (61) so that the upper and lower limits of the regulating switch (51) are located on the mounting seat (6).

5. A flow-adjustable spray gun according to claim 4, characterized in that: The mounting seat (6) is provided with a first through hole (62) for the gear (511) to pass through, and the gear (511) passes through the first through hole (62) to connect to the rack (521).

6. A flow-adjustable spray gun according to claim 4, characterized in that: The top of the gun body (1) is provided with a mounting opening (12) adapted to the mounting seat (6); the mounting opening (12) is provided with a limiting protrusion (121); the mounting seat (6) is provided with a second through hole (63) adapted to the limiting protrusion (121); the limiting protrusion (121) is connected to the second through hole (63) to limit the rotation of the mounting seat (6) in the mounting opening (12).

7. The flow-adjustable spray gun according to claim 1, characterized in that: The valve needle (3) is provided with a through hole structure, and the bottom end of the linkage member (52) is movably installed in the through hole structure, and the through hole structure is the limiting cavity (31).

8. The flow-adjustable spray gun according to claim 1, characterized in that: The wrench (4) is rotatably mounted on the gun body (1), and a connecting rod (32) is provided between the valve needle (3) and the wrench (4). The valve needle (3) is linked to the wrench (4) via the connecting rod (32). The wrench (4) is rotated under force to drive the valve needle (3) to slide back and forth in the first fluid channel (11) via the connecting rod (32).

9. A flow-adjustable spray gun according to claim 8, characterized in that: The side wall of the gun body (1) is provided with a first sliding groove (13) adapted to the connecting rod (32), the wrench (4) is provided with a connecting hole (41) adapted to the connecting rod (32), and the end of the connecting rod (32) passes through the first sliding groove (13) and is connected to the connecting hole (41).

10. The flow-adjustable spray gun according to claim 1, characterized in that: The bottom of the gun body (1) is detachably connected to a material pot (7), and a second fluid channel (71) connected to the first fluid channel (11) is provided in the material pot (7); the gun body (1) is provided with a base (14) adapted to the opening of the material pot (7), and the base (14) is threadedly connected to the material pot (7); and the bottom of the wrench (4) is provided with a avoidance recess (42) adapted to the base (14).

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