Spray head assembly and spray gun

Abstract

The present application relates to a nozzle assembly and a spray gun. The spray gun includes a main body and the nozzle assembly connected to the main body, and the nozzle assembly includes a shell, a ring cup, a sleeve and a furnace core. The shell is axially penetrated and has a first side and a second side; the ring cup is sleeved in the shell along the first side; the sleeve is clamped in the shell along the second side; the furnace core simultaneously penetrates the ring cup, the shell and the sleeve, and the furnace core has a first end and a second end, and the furnace core holds the ring cup against the first side through the first end, and the furnace core is clamped with the sleeve through the second end. The traditional spray gun needs to screw the furnace core into the spray gun head in circles to achieve a threaded connection. Compared with the traditional assembly method of the spray gun, the spray gun of the present application omits the step of tightening and fixing when installing the furnace core on the spray gun head. It only needs to pass the second end of the furnace core through the ring cup and the shell and directly clamp with the sleeve on the second side of the shell, which has higher assembly efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of burners, and particularly to a nozzle assembly and a spray gun. Background Art

[0002] Spray guns are widely used in life, and can be used to light a fireplace or a candle at home, or to light charcoal or a gas stove, etc.

[0003] However, traditional spray guns have the problem of low assembly efficiency. Summary of the Invention

[0004] Based on this, in view of the above problems, it is necessary to provide a nozzle assembly and a spray gun.

[0005] A nozzle assembly, comprising:

[0006] A housing, which penetrates axially and has a first side and a second side;

[0007] A ring cup, sleeved in the housing along the first side;

[0008] A sleeve, clamped to the housing along the second side;

[0009] A burner core, which penetrates through the ring cup, the housing and the sleeve at the same time. The burner core has a first end and a second end. The burner core abuts the ring cup against the first side through the first end, and the burner core is clamped to the sleeve through the second end.

[0010] The above nozzle assembly can be used for installation at the head of a spray gun. When assembling the nozzle assembly, the first end of the burner core can abut the ring cup against the first side of the housing, and the second end of the burner core passes through the ring cup and the housing and is clamped to the sleeve on the second side of the housing. For traditional nozzle assemblies, threads need to be tapped at the head of the nozzle assembly, and the burner core needs to be screwed into it one by one during assembly to achieve threaded connection. Obviously, this requires more assembly time, and the burner core may be screwed crooked during the assembly process, that is, the assembly efficiency is low and the defective rate is high, which further leads to high production costs. Compared with the assembly method of traditional nozzle assemblies, when installing the burner core at the head of the nozzle assembly in this application, the step of tightening and fixing is omitted. Only the second end of the burner core needs to pass through the ring cup and the housing and be directly clamped to the sleeve on the second side of the housing, and it can be fixed instantly, so that the assembly can be achieved in one step. Such a setting improves the assembly efficiency on the one hand and reduces the defective rate on the other hand, greatly reducing the production cost.

[0011] In one embodiment, a first convex edge for abutting against the cup wall of the ring cup is provided on the inner circumferential surface of the housing. A second convex edge is provided on the inner circumferential surface of the ring cup. An anti - detachment rib is provided on the outer circumferential surface of the first end of the furnace core. The furnace core abuts against the second convex edge through the anti - detachment rib to hold the ring cup against the first convex edge. When the second end of the furnace core passes through the housing and is fixedly connected to the sleeve on the second side of the housing, the first end of the furnace core can abut against the second convex edge of the ring cup, and then press the ring cup tightly against the first convex edge on the first side of the housing.

[0012] In one embodiment, the first convex edge extends circumferentially along the inner circumferential surface of the housing in a closed - loop shape; and / or, the second convex edge extends circumferentially along the inner circumferential surface of the ring cup in a closed - loop shape; and / or, the anti - detachment rib extends circumferentially along the outer circumferential surface of the first end in a closed - loop shape. It can be understood that when the first convex edge, the second convex edge and the anti - detachment rib are all in a closed - loop shape, the first convex edge can be closely attached to the cup wall of the ring cup, and the force is balanced; similarly, the second convex edge can also be closely attached to the anti - detachment rib, and the force is balanced. Such a setting can improve the assembly reliability among the furnace core, the ring cup and the housing.

[0013] In one embodiment, a fixing hole is provided in the middle of the sleeve. A fixing rib is provided on the outer circumferential surface of the second end of the furnace core. The second end is arranged to be able to pass through the fixing hole under the action of an external force, so that the fixing rib is clamped on the side of the sleeve away from the housing.

[0014] In one embodiment, the cross - sectional profile of the position where the fixing rib is located on the second end is larger than the cross - sectional profile of the fixing hole. When the second end passes through the fixing hole, the fixing hole is arranged to be able to elastically deform under the extrusion of the fixing rib, so that the fixing rib passes through the fixing hole and is clamped on the side of the sleeve away from the housing. Such a setting can be considered as follows: when the fixing rib at the second end of the furnace core passes through the fixing hole, the aperture of the fixing hole is temporarily enlarged by the fixing rib to allow the fixing rib to pass through; after the fixing rib passes through, the enlarged fixing hole returns to its original aperture size, and the fixing rib then remains on the side of the sleeve away from the housing and is clamped at the edge of the fixing hole.

[0015] In one embodiment, the nozzle assembly further includes an annular limiting piece. The limiting piece is arranged to be sleeved between the fixing rib and the sleeve when the second end passes through the fixing hole, and the fixing rib is clamped on the side of the sleeve away from the housing through the limiting piece.

[0016] In one embodiment, the fixing rib extends circumferentially along the outer circumferential surface of the second end in a closed - loop shape. This can make the fixing rib closely attached to the sleeve, and the force is balanced.

[0017] In one embodiment, a clamping convex portion is provided on the outer circumferential surface of the ring cup, and a clamping concave portion for the clamping convex portion to extend into is provided on the inner circumferential surface of the first side of the housing. The housing cooperates with the clamping convex portion through the clamping concave portion to limit the movement of the ring cup in the circumferential direction of the housing. Such a setting can prevent the ring cup from rotating relative to the housing or the furnace core after being assembled.

[0018] In one embodiment, a fixing hole is formed in the middle of the sleeve, and fixing ribs are provided on the outer circumferential surface of the second end of the furnace core. The second end is arranged to be able to pass through the fixing hole under the action of an external force, so that the fixing ribs are clamped on the inner circumferential surface of the fixing hole. Such a setting can be considered that the fixing ribs do not need to pass through the fixing hole and can directly abut against the hole wall of the fixing hole to achieve fixation.

[0019] In one embodiment, the ring cup is a ceramic ring cup.

[0020] In one embodiment, the sleeve is a plastic sleeve. The nylon sleeve is heat-resistant and has a certain elasticity, which can support a certain elastic deformation of the fixing hole of the sleeve under the extrusion of the fixing ribs.

[0021] In one embodiment, the sleeve is sleeved on the inner circumferential surface of the housing from the second side of the housing with an interference fit. The sleeve can be directly pressed into the housing from the second side to achieve connection, which is convenient to operate and has high assembly efficiency.

[0022] In one embodiment, a limiting boss is provided on the surface of the sleeve close to the housing, and a limiting groove is formed on the second side of the housing. The sleeve is sleeved in the limiting groove through the limiting boss to be in interference fit with the second side of the housing. During assembly, the limiting boss of the sleeve can be directly pressed into the limiting groove from the second side of the housing, and the outer circumferential surface of the limiting boss abuts against the groove wall of the limiting groove to achieve interference connection, which is convenient to operate and has high assembly efficiency.

[0023] In one embodiment, the outer contour shape of the cross-section of the limiting boss is any one of an arc shape, a sector shape, a semi-circular shape, a rectangular shape, and a triangular shape, and the limiting groove is adapted to the limiting boss in shape. Such a setting can prevent the sleeve from rotating along the circumferential direction of the housing.

[0024] The present application also relates to a spray gun, which includes a main body and the nozzle assembly described in any one of the above embodiments, and the nozzle assembly is connected to the main body.

[0025] For the above spray gun, the nozzle assembly can be quickly assembled as described in the above embodiments, and then connected to the main body of the spray gun after the nozzle assembly is assembled. It can be understood that the improvement of the assembly efficiency of the nozzle assembly is also the improvement of the overall assembly efficiency of the spray gun, which is conducive to reducing the production cost of the spray gun. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 Stereoscopic view of the structure of the nozzle assembly provided by an embodiment of the present invention;

[0028] Figure 2 Cross-sectional view of the nozzle assembly provided by an embodiment of the present invention;

[0029] Figure 3 Explosion diagram of the nozzle assembly provided by an embodiment of the present invention;

[0030] Figure 4 Another explosion diagram of the nozzle assembly provided by an embodiment of the present invention;

[0031] Figure 5 Assembly diagram of the fixing component provided by an embodiment of the present invention, wherein the furnace core has been installed in the shell;

[0032] Figure 6 Another assembly diagram of the fixing component provided by an embodiment of the present invention;

[0033] Figure 7 Explosion diagram of the nozzle assembly provided by another embodiment of the present invention.

[0034] Reference numerals:

[0035] 10. Nozzle assembly; 100. Shell; 101. First side; 102. Second side; 110. First flange; 120. Clamping recess; 121. Clamping block; 130. Limiting groove; 200. Ring cup; 210. Clamping protrusion; 220. Second flange; 300. Sleeve; 310. Fixing hole; 320. Limiting boss; 400. Furnace core; 410. First end; 420. Second end; 430. Anti-detachment rib; 440. Fixing rib; 500. Limiting piece. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] To make the above objects, features, and advantages of the present invention more apparent and understandable, the following will describe the specific embodiments of the present invention in detail with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0037] Please refer to Figures 1 to 6 , this application provides a nozzle assembly 10, which can be used to be installed on a spray gun. The nozzle assembly 10 includes a housing 100, a ring cup 200, a sleeve 300, and a furnace core 400. Among them, the housing 100 penetrates axially and has a first side 101 and a second side 102. The first side 101 and the second side 102 can be considered as the opposite sides of the housing 100 in the axial direction. The ring cup 200 is sleeved in the housing 100 along the first side 101, and the ring cup 200 can be a ceramic ring cup. The sleeve 300 is clamped to the housing 100 along the second side 102. The furnace core 400 penetrates through the ring cup 200, the housing 100, and the sleeve 300 at the same time. The furnace core 400 has a first end 410 and a second end 420. The furnace core 400 abuts the ring cup 200 against the first side 101 through the first end 410, and the furnace core 400 is clamped to the sleeve 300 through the second end 420. Among them, the furnace core 400 can be made of materials such as copper or zinc alloy, and is connected to the conduit for conveying fuel in the spray gun and serves as the outlet of the fuel.

[0038] For the above nozzle assembly 10, as Figures 2 to 6 shown, during assembly, at this time, the first end 410 of the furnace core 400 can abut the ring cup 200 against the first side 101 of the housing 100, and the second end 420 of the furnace core 400 passes through the ring cup 200, the housing 100 and is clamped to the sleeve 300 on the second side 102 of the housing 100. The traditional nozzle assembly 10 needs to tap threads at the head of the nozzle assembly 10 and screw the furnace core 400 into it one by one during assembly to achieve threaded connection. Obviously, this requires more assembly time, and the furnace core 400 may be screwed crooked during the assembly process, that is, the assembly efficiency is low and the defective rate is high, which in turn leads to higher production costs. Compared with the assembly method of the traditional nozzle assembly 10, when installing the furnace core 400 at the head of the nozzle assembly 10 of this application, the step of tightening and fixing is omitted. Only the second end 420 of the furnace core 400 needs to pass through the ring cup 200, the housing 100 and be directly clamped to the sleeve 300 on the second side 102 of the housing 100, and it is fixed instantly, so that the assembly can be achieved in one step. Such a setting improves the assembly efficiency on the one hand and reduces the defective rate on the other hand, greatly reducing the production cost.

[0039] Specifically, as Figures 2 to 5As shown, in some of these embodiments, a first convex edge 110 is provided radially inward along the inner circumferential surface of the housing 100, and the first convex edge 110 is used to abut against the cup wall of the ring cup 200. A second convex edge 220 is provided radially inward along the inner circumferential surface of the ring cup 200, and an anti-disengagement rib 430 is provided radially outward along the outer circumferential surface of the first end 410 of the furnace core 400. The furnace core 400 abuts against the second convex edge 220 through the anti-disengagement rib 430 to hold the ring cup 200 against the first convex edge 110. When the second end 420 of the furnace core 400 passes through the housing 100 and is fixedly connected to the sleeve 300 on the second side 102 of the housing 100, the first end 410 of the furnace core 400 can abut against the second convex edge 220 of the ring cup 200, and then press the ring cup 200 against the first convex edge 110 on the first side 101 of the housing 100.

[0040] More specifically, as Figure 2 , Figure 3 , Figure 4 and Figure 5 shown, in some of these embodiments, the first convex edge 110 extends circumferentially along the inner circumferential surface of the housing 100 to form a closed loop, the second convex edge 220 extends circumferentially along the inner circumferential surface of the ring cup 200 to form a closed loop, and the anti-disengagement rib 430 extends circumferentially along the outer circumferential surface of the first end 410 to form a closed loop. It can be understood that when the first convex edge 110, the second convex edge 220, and the anti-disengagement rib 430 are all in the shape of a closed loop, the first convex edge 110 can be closely attached to the cup wall of the ring cup 200, and the force is balanced; similarly, the second convex edge 220 can also be closely attached to the anti-disengagement rib 430, and the force is balanced. Such a setting can improve the assembly reliability among the furnace core 400, the ring cup 200, and the housing 100. It should be noted that the second convex edge 220 on the inner circumferential surface of the ring cup 200 can also be considered as a part of the cup wall of the ring cup 200. For example, in the embodiment as Figure 2 shown, the first convex edge 110 extends circumferentially along the inner circumferential surface of the housing 100 to form a closed loop, the second convex edge 220 extends circumferentially along the inner circumferential surface of the ring cup 200 to form a closed loop, the inner diameter of the second convex edge 220 of the ring cup 200 abuts against the first convex edge 110 inside the housing 100, and their inner diameters are approximately equal. The inner contour of the cross-section of the first convex edge 110 and the inner contour of the cross-section of the second convex edge 220 are adapted in shape and size to the inner contour of the cross-section of the furnace core 400 passing through here. Such a setting can use the first convex edge 110 to limit the movement of the furnace core 400 in the radial direction of the housing 100, and can use the furnace core 400 to limit the movement of the second convex edge 220 in the radial direction of the furnace core 400, that is, use the furnace core 400 to limit the movement of the ring cup 200 in the radial direction of the furnace core 400.

[0041] Please refer to Figure 2 , Figure 3 , Figure 4 and Figure 6, in some embodiments, a fixing hole 310 is formed in the middle of the sleeve 300, and fixing ribs 440 are provided on the outer circumferential surface of the second end 420 of the furnace core 400. The second end 420 is configured to be able to pass through the fixing hole 310 under the action of an external force, so that the fixing ribs 440 are clamped on the side of the sleeve 300 away from the housing 100.

[0042] Specifically, as Figure 1 and Figure 2 shown, in some embodiments, the cross-sectional profile of the position where the fixing ribs 440 are located on the second end 420 is larger than the cross-sectional profile of the fixing hole 310. When the second end 420 passes through the fixing hole 310, the fixing hole 310 is configured to be able to elastically deform under the extrusion of the fixing ribs 440, so that the fixing ribs 440 pass through the fixing hole 310 and are clamped on the side of the sleeve 300 away from the housing 100. Such a setting can be considered that when the fixing ribs 440 on the second end 420 of the furnace core 400 pass through the fixing hole 310, the aperture of the fixing hole 310 is temporarily enlarged by the fixing ribs 440 to allow the fixing ribs 440 to pass through. After the fixing ribs 440 pass through, the enlarged fixing hole 310 returns to its original aperture size, and the fixing ribs 440 are then left on the side of the sleeve 300 away from the housing 100 and are clamped at the edge of the fixing hole 310. Among them, the sleeve 300 can be a nylon sleeve 300. The nylon sleeve 300 is heat-resistant and has a certain elasticity, which can support the fixing hole 310 of the sleeve 300 to elastically deform to a certain extent under the extrusion of the fixing ribs 440.

[0043] More specifically, as Figure 1 , Figure 3 and Figure 4 shown, in some embodiments, the fixing ribs 440 extend circumferentially along the outer circumferential surface of the second end 420 in a closed loop. This can make the fixing ribs 440 fit closely with the sleeve 300 and the force is balanced.

[0044] In other embodiments, a fixing hole 310 is formed in the middle of the sleeve 300, and fixing ribs 440 are provided on the outer circumferential surface of the second end 420 of the furnace core 400. The second end 420 is configured to be able to pass through the fixing hole 310 under the action of an external force, so that the fixing ribs 440 are clamped on the inner circumferential surface of the fixing hole 310. Such a setting can be considered that the fixing ribs 440 do not need to pass through the fixing hole 310 and can be directly abutted against the hole wall of the fixing hole 310 to achieve fixation. For example, a groove (not shown) adapted to the fixing ribs 440 can be formed on the hole wall of the fixing hole 310. When the fixing ribs 440 extend into the fixing hole 310, the groove can accommodate the fixing ribs 440 and be clamped with them.

[0045] Please refer to Figure 7, in some other embodiments, a fixing hole 310 is formed in the middle of the sleeve 300, and fixing ribs 440 are provided on the outer circumferential surface of the second end 420 of the furnace core 400. The second end 420 is configured to be able to pass through the fixing hole 310 under the action of an external force, so that the fixing ribs 440 are clamped on the side of the sleeve 300 away from the housing 100. Specifically, as Figure 7 shown, the nozzle assembly 10 further includes a limiting piece 500. A notch 501 is formed on one side of the limiting piece 500, that is, the limiting piece 500 is in an open-ring shape. The limiting piece 500 can be a metal elastic piece or a high-temperature resistant plastic elastic piece, etc. When the fixing ribs 440 on the second end 420 pass through the fixing hole 310, the limiting piece 500 can be sleeved on the second end 420 through the notch 501, and the limiting piece 500 is clamped between the sleeve 300 and the fixing ribs 440. Among them, the inner diameter of the inner ring of the limiting piece 500 is smaller than the diameter of the fixing ribs 440 on the second end 420. This can be considered that the inner contour of the cross-section of the limiting piece 500 is smaller than the cross-section contour of the position where the fixing ribs 440 on the second end 420 are located. Therefore, the second end 420 of the furnace core 400 can be clamped on the side of the sleeve 300 away from the housing 100 through the fixing ribs 400.

[0046] Please refer to Figure 4 and Figure 5 , in some of these embodiments, a clamping convex portion 210 is provided on the outer circumferential surface of the ring cup 200, and a clamping concave portion 120 for the clamping convex portion 210 to extend into is provided on the inner circumferential surface of the first side 101 of the housing 100. The housing 100 cooperates with the clamping convex portion 210 through the clamping concave portion 120 to limit the movement of the ring cup 200 in the circumferential direction of the housing 100.

[0047] Specifically, in the embodiment as Figure 4 shown, a plurality of clamping blocks 121 protrude radially inward on the inner circumferential surface of the second side 102 of the housing 100. The plurality of clamping blocks 121 are arranged at intervals in the circumferential direction of the housing 100, and two of the clamping blocks 121 enclose the above-mentioned clamping concave portion 120. Such a setting can clamp the clamping convex portion 210 by two of the clamping blocks 121, that is, the clamping concave portion 120 is in limit cooperation with the clamping convex portion 210, so as to prevent the ring cup 200 from rotating relative to the housing 100 or the furnace core 400 after being assembled. The remaining clamping convex portions 210 can also contact the outer circumferential surface of the ring cup 200, thereby restricting the radial movement of the ring cup 200 along the housing 100.

[0048] It should be noted that during assembly, it is possible to first sleeved the ring cup 200 on the inner circumferential surface of the first side 101 of the housing 100, and then pass the furnace core 400 through the ring cup 200 and the housing 100 to be snap-fitted with the sleeve 300; it is also possible to first sleeved the ring cup 200 on the outside of the furnace core 400, and then insert the furnace core 400 and the ring cup 200 together from the first side 101 of the housing 100. How to assemble can be chosen by the user.

[0049] Please refer to Figure 2 、 Figure 3 、 Figure 4 and Figure 6 , in some embodiments, the sleeve 300 is press-fitted on the inner circumferential surface of the housing 100 from the second side 102 of the housing 100.

[0050] Specifically, as shown in Figure 3 and Figure 4 , in some embodiments, a limiting boss 320 is provided on the surface of the sleeve 300 close to the housing 100, and a limiting groove 130 is provided on the second side 102 of the housing 100. The sleeve 300 is sleeved in the limiting groove 130 through the limiting boss 320 to be press-fitted with the second side 102 of the housing 100. Among them, the outer contour of the cross-section of the limiting boss 320 is slightly larger than the inner contour of the cross-section of the limiting groove 130 in size. During assembly, the limiting boss 320 of the sleeve 300 can be directly pressed into the limiting groove 130 from the second side 102 of the housing 100, and the outer circumferential surface of the limiting boss 320 abuts against the groove wall of the limiting groove 130 to achieve an interference connection, which is convenient to operate and has high assembly efficiency.

[0051] More specifically, as shown in Figure 3 and Figure 4 , in some embodiments, the outer contour shape of the cross-section of the limiting boss 320 is any one of an arc shape, a fan shape, a semi-circular shape, a rectangular shape, and a triangular shape, and the limiting groove 130 is adapted to the limiting boss 320 in shape. For example, in the embodiment shown in Figure 4 , the outer contour shape of the cross-section of the limiting boss 320 is an arc shape, and the limiting groove 130 is adapted to the limiting boss 320 in shape. Such a setting can prevent the sleeve 300 from rotating along the circumferential direction of the housing 100.

[0052] In addition, the present application also relates to a spray gun (not shown), which includes a main body and the spray head assembly 10 described in any of the above embodiments, and the spray head assembly 10 is connected to the main body, such as being installed at the head position of the spray gun main body.

[0053] For the above spray gun, the nozzle assembly 10 can be quickly assembled as described in the above embodiments, and after the nozzle assembly 10 is assembled, it is then connected to the main body of the spray gun. It can be understood that the improvement in the assembly efficiency of the nozzle assembly 10 also means the improvement in the overall assembly efficiency of the spray gun, which is conducive to reducing the production cost of the spray gun.

[0054] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0055] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "thickness", "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0056] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0057] In the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected", "connected to", "fixed" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In the present invention, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is less than that of the second feature.

[0059] It should be noted that when an element is referred to as being "provided on", "fixed to" or "disposed on" another element, it may be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "above", "below", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0060] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as falling within the scope described in this specification.

[0061] The above-described embodiments merely represent several embodiments of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

[0062] In the description of this specification, the description with reference to the terms "an embodiment", "other embodiments" and the like means that the specific features, structures, materials or features described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application herein are only for the purpose of describing specific embodiments and are not intended to limit this application.

Claims

1. A spray head assembly, characterized in that, Comprising: A housing, on the inner circumferential surface of which there is a first convex edge, the housing axially penetrates and has a first side and a second side, and on the first side of the housing there is a clamping concave portion on the inner circumferential surface; A ring cup, sleeved in the housing along the first side, the first convex edge is used to abut against the cup wall of the ring cup, on the inner circumferential surface of the ring cup there is a second convex edge, and on the outer circumferential surface of the ring cup there is a clamping convex portion for extending into the clamping concave portion; A sleeve, clamped to the housing along the second side, and a fixing hole is provided in the middle of the sleeve; A furnace core, the furnace core penetrates through the ring cup, the housing and the sleeve at the same time, the furnace core has a first end and a second end, the furnace core abuts the ring cup against the first side through the first end, the furnace core is clamped to the sleeve through the second end, on the outer circumferential surface of the first end of the furnace core there is an anti-disengagement rib, and the furnace core abuts the ring cup against the first convex edge by abutting against the second convex edge through the anti-disengagement rib, on the outer circumferential surface of the second end of the furnace core there is a fixing rib, the cross-sectional profile of the position where the fixing rib is located on the second end is larger than the cross-sectional profile of the fixing hole, the second end is arranged to be able to pass through the fixing hole under the action of an external force, and the fixing hole is arranged to be able to elastically deform under the extrusion of the fixing rib, so that the fixing rib is clamped to the side of the sleeve away from the housing.

2. The spray head assembly according to claim 1, characterized in that, The first convex edge extends circumferentially along the inner circumferential surface of the housing in a closed loop shape.

3. The spray head assembly according to claim 1, characterized in that, The second convex edge extends circumferentially along the inner circumferential surface of the ring cup in a closed loop shape.

4. The spray head assembly according to claim 1, characterized in that, The anti-disengagement rib extends circumferentially along the outer circumferential surface of the first end in a closed loop shape.

5. The spray head assembly according to claim 1, characterized in that, The spray head assembly further includes an annular limiting piece, and the limiting piece is arranged to be sleeved between the fixing rib and the sleeve when the second end passes through the fixing hole, and the fixing rib is clamped to the side of the sleeve away from the housing through the limiting piece.

6. The spray head assembly according to claim 1, characterized in that, The fixing rib extends circumferentially along the outer circumferential surface of the second end in a closed loop shape.

7. The spray head assembly according to any one of claims 1 to 6, characterized in that, The housing cooperates with the clamping concave portion and the clamping convex portion to limit the movement of the ring cup in the circumferential direction of the housing; And / or, the ring cup is a ceramic ring cup; And / or, the sleeve is a plastic sleeve.

8. The spray head assembly according to any one of claims 1 to 6, characterized in that, The sleeve is sleeved on the inner circumferential surface of the housing from the second side of the housing with an interference fit.

9. The spray head assembly according to claim 8, characterized in that, On the side of the sleeve close to the housing there is a limiting boss, and on the second side of the housing there is a limiting groove, and the sleeve is sleeved in the limiting groove through the limiting boss to have an interference fit with the second side of the housing.

10. The spray head assembly according to claim 9, characterized in that, The outer contour shape of the cross-section of the limiting boss is any one of an arc shape, a sector shape, a semi-circular shape, a rectangular shape, and a triangular shape, and the limiting groove is adapted to the limiting boss in shape.

11. A spray gun, characterized in that, Comprising a main body and the spray head assembly according to any one of claims 1 to 10, and the spray head assembly is connected to the main body.

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