TWI490048B - The construction of spray guns - Google Patents

Description

Spray gun construction

The invention is a construction of a spray gun, in particular, it can conveniently adjust different pressures of the spray gun, and is convenient for the user to disassemble the nozzle on the spray gun.

In the process of using the spray gun, it is necessary to adjust the pressure value of the sprayed gas to match the different spray paints. The user needs to disassemble the spray gun to achieve the purpose of adjusting the gas pressure. The conventional paint spray gun is like the one in the ninth figure. The spray gun comprises a gun body (A), a gas flow guiding element (B), an inner nozzle (C), a splitter (D) and an outer nozzle (E), wherein the inner nozzle (C) is an orthodontic tooth The direction is screwed to the air flow guiding element (B), and the air flow guiding element (B) is screwed to the gun body (A) in the anti-tooth direction.

Conventional spray guns have the following disadvantages:

1. When the conventional spray gun needs to be replaced with the inner nozzle (C) in the air flow guiding member (B), since the inner nozzle (C) and the air flow guiding member (B) are in a state of being positively and negatively screwed together, the inner nozzle ( C) When rotating in the orthodontic direction to the airflow guiding element (B), the inner nozzle (C) will also loosen the airflow guiding element (B) to the gun body (A), and the user must again reverse The direction of rotation of the fixed airflow guiding member (B) is screwed to the position on the gun body (A), so each time the inner nozzle (C) is replaced, the air guiding member (B) must be adjusted on the gun body (A). It is quite inconvenient to use.

2. Since the airflow guiding element (B) is made in one piece, and the airflow guiding element (B) is screwed to the outer part of the gun body (A), the thread (B1) is complicated and the air pressure is adjusted. When the paint is sprayed, the air flow guiding member (B) needs to be replaced as a whole, and the user is inconvenient in relative use, and the manufacturing material cost is relatively high.

In view of the above-mentioned previous case, when disassembling the spray gun, it is necessary to adjust the action of the air flow guiding element, and the adjustment of different gas pressures is also inconvenient, and the like. The present invention provides a spray gun structure, which comprises a gun body. The utility model comprises a connecting surface, an adjusting needle bar, a first-class road and a paint connecting port connected to the flow channel, wherein the connecting surface is provided with a first gas storage tank, a second gas storage tank and a communication to the a connecting hole of the flow channel, wherein the connecting surface is respectively provided with a first air outlet hole in the first gas storage groove and a second air outlet hole in the second gas storage groove; and a connecting pipe is correspondingly connected to the gun body a connecting hole, the connecting pipe is provided with a pair of fixing holes connected to the paint strip mouth, the connecting pipe is provided with a connecting portion; a paint connecting pipe is correspondingly connected to the paint connecting pipe mouth of the gun body, the connecting paint pipe One end of the connecting end corresponding to the fixing hole of the connecting pipe; a sealing ring attached to the connecting surface of the gun body, the sealing ring ring is provided with a through hole into the connecting pipe, and The gasket ring is respectively provided with a first through hole corresponding to the first gas storage tank a second through hole corresponding to the second gas storage tank; a gas pressure adjusting member is connected to the connecting pipe, the air pressure adjusting member comprises an adjusting ring body and a gas pressure ring, and the adjusting ring system is provided with a corresponding joint An annular groove of the air pressure ring and a through hole extending through the adjusting ring body, wherein the adjusting ring system is respectively provided with a first air flow channel and a second air flow channel, wherein the first air flow channel and the second air flow channel are respectively connected to The first through hole and the second through hole, and the first air flow path is connected to the annular groove, and the air pressure ring is provided with a plurality of through holes; a nozzle member is coupled with the air pressure adjusting member, and Connected to the nozzle, the nozzle member is provided with a joint connecting the connection portion.

The above-mentioned pores are equidistantly arranged annularly on the gas pressure ring.

The air pressure adjusting member is further provided with a stagnation sealing ring, and the outer ring of the adjusting ring body is provided with a ring wall, and the stagnation sealing ring is sleeved outside the ring wall.

The gun system is further provided with a positioning pin, and a connecting hole for the positioning pin is inserted into the connecting surface of the gun body, and the sealing ring is additionally provided with a positioning pin for passing through the positioning pin. a connecting hole, the adjusting ring system is provided with a second positioning hole for the positioning pin to penetrate.

The nozzle member includes an outer nozzle, an inner nozzle and a fixing ring, and the joint portion is disposed at the inner nozzle end, and the outer nozzle is provided with an accommodating space disposed opposite to the inner nozzle, the fixing The ring system is coupled to the outer side of the outer nozzle, and a first fixing portion is disposed on the outer side of the adjusting ring body, and the fixing ring is provided with a second fixing portion fixed to the first fixing portion.

The nozzle is provided with a first air flow channel, a gas jet port and a gas jet hole, wherein the first gas flow channel and the gas jet port are connected to the accommodating space, and the gas vent hole is connected to the first gas flow channel. The adjusting ring system is further provided with a diagonal airflow channel, the oblique airflow channel is connected to the second airflow channel, and the inner nozzle is provided with a second airflow channel corresponding to the oblique airflow channel and a corresponding wearer Into the spray nozzle of the jet.

The connecting portion of the connecting tube and the second fixing portion of the fixing ring are an internal thread, and the joint portion of the inner nozzle and the first fixing portion of the adjusting ring body are screwed correspondingly to the internal thread External thread.

The invention has the following advantages:

1. The invention penetrates the connecting end of the paint tube into the fixing hole of the connecting tube, so that the connecting tube is restricted by the receiving end and can not be rotated on the connecting hole at all, and the user is screwed inside. At the same time, the nozzle cannot be screwed loosely on the joint hole of the joint surface to achieve the effect of positioning the joint on the joint surface of the gun body.

2. The present invention can adjust the air pressure of different sizes by using the air pressure adjusting member, and the user only needs to remove the fixing ring to the outside of the adjusting ring body, and install the air pressure ring with the air holes of different aperture sizes in the annular groove of the adjusting ring body. This can achieve the effect of easy replacement and cleaning.

3. The invention separately processes the adjusting ring body and the connecting pipe, and the adjusting ring system has an annular groove into which the air pressure ring can be inserted. When the user wants to adjust different air pressure values, the user only needs to replace the air pressure ring in the annular groove. And the adjustment ring body does not need to be changed, which can reduce the manufacturing cost and save the time for adjusting the air pressure.

4. The invention can form a cyclone in the inner nozzle by obliquely flowing air passage to accelerate the gas flow, so that the air compressor does not continuously supply air pressure as the straight air flow passage, so that the air compressor running load can also be reduced, relative to Save electricity.

5. The first gas storage tank and the second gas storage tank of the gas on the joint surface of the gun body can form a buffer gas flow rate region, and prevent the gas from the air compressor from directly impacting the adjusting ring body to maintain The gas can flow smoothly from the air outlet to the first airflow path and the second airflow path of the adjustment ring body, and the air compressor is more efficient and consumes energy.

6. The present invention absorbs the paint in the flow channel by the suction of the airflow provided by the oblique airflow passage to reduce the residual amount of the paint in the gun body, thereby avoiding the solidification of the paint. Clean the flow path of the gun body.

(1) ‧‧‧ gun body

(11)‧‧‧ Connection surface

(111)‧‧‧First gas storage tank

(111A)‧‧‧Second gas storage tank

(112)‧‧‧Contact holes

(113)‧‧‧First vent

(113A)‧‧‧Second air outlet

(114)‧‧‧First positioning hole

(12)‧‧‧Adjustment needle bar

(13)‧‧‧ flow path

(14)‧‧‧ Painted nozzle

(15)‧‧‧Locating pins

(2) ‧ ‧ take over

(21) ‧‧‧Fixed holes

(22) ‧‧‧Connecting Department

(3) ‧‧‧ Painted tube

(31)‧‧‧ Receiver

(4) ‧ ‧ seal ring

(41)‧‧‧through holes

(42)‧‧‧Connecting holes

(43) ‧‧‧ first through hole

(43A)‧‧‧Second through hole

(5) ‧‧‧Pneumatic adjustment parts

(51) ‧‧‧Adjustment of the ring

(511) ‧‧‧ring groove

(512) ‧‧‧Perforation

(513)‧‧‧First airflow path

(513A) ‧‧‧Second airflow

(514)‧‧‧Second positioning hole

(515) ‧ ‧ Circumference

(516) ‧ ‧ first fixed joint

(517)‧‧‧ oblique airflow

(52) ‧‧‧Air pressure ring

(521) ‧‧‧ stomata

(53) ‧ ‧ stagnation ring

(6) ‧ ‧ nozzle parts

(61) ‧ ‧ outer nozzle

(611) ‧‧‧ accommodating space

(612)‧‧‧First airflow path

(613) ‧ ‧ vents

(614) ‧‧‧jet holes

(62) ‧ ‧ inner nozzle

(621) ‧ ‧ ‧ Joint Department

(622)‧‧‧Second airflow channel

(623)‧‧‧Spray nozzle

(63)‧‧‧Fixed ring

(631)‧‧‧Second fixed joint

(A) ‧‧‧ gun body

(B) ‧‧‧Airflow guiding elements

(B1)‧‧‧ external thread

(C) ‧ ‧ nozzle

(D) ‧ ‧ splitter

(E) ‧ ‧ outer nozzle

The first figure is a perspective exploded view of the present invention.

The second drawing is a sectional view of the combination of the present invention.

The third figure is a cross-sectional view of another combination of the present invention.

The fourth figure is a schematic diagram of the combination of the adjusting ring body and the air pressure ring of the present invention.

The fifth figure is a front view of the adjustment ring body of the present invention.

Figure 6 is a cross-sectional view of the adjustment ring of the present invention taken along the line A-A.

Figure 7 is a cross-sectional view of the adjustment ring of the present invention taken along the line B-B.

The eighth figure is a schematic diagram of the flow direction of the present invention.

The ninth figure is an exploded view of a conventional spray gun.

First, referring to the first to third figures, the present invention is a spray gun structure comprising a gun body (1), a nozzle (2), a paint tube (3), and a gasket. a ring (4), a gas pressure adjusting member (5) and a nozzle member (6), wherein: the gun body (1) comprises a connecting surface (11), an adjusting needle bar (12), and a first-class track (13) a paint port (14) connected to the flow path (13) and a positioning pin (15), the connection surface (11) is provided with a first gas storage tank (111), a second gas storage a slot (111A) and a connecting hole (112) connected to the flow channel (13), and the connecting surface (11) is respectively provided with a first air outlet (113) in the first air reservoir (111) a second air outlet (113A) is disposed in the second air reservoir (111A) and a first positioning hole (114) through which the positioning pin (15) is inserted. The adjusting needle bar (12) can be used to adjust the spray paint. The amount of paint.

The connecting tube (2) is corresponding to the connecting hole (112) of the gun body (1), and the connecting tube (2) is provided with a pair of fixing holes (21) connected to the paint strip port (14), the connecting tube (2) is provided A connecting portion (22), the connecting portion (22) of the connecting tube (2) is an internal thread.

The paint strip (3) is correspondingly connected to the paint port (14) of the gun body (1), and one end of the paint strip (3) is provided with a fixing hole corresponding to the nozzle (2) ( 21) The connecting end (31), because the paint connecting tube (3) and the connecting tube (2) are connected to each other and connected, the user can connect the paint can to the paint tube (3) and inject the paint into the nozzle (2) ) used internally.

a gasket ring (4) attached to the joint surface (11) of the gun body (1), the gasket ring (4) is provided with a through hole (41) into the nozzle (2), The gasket ring (4) is further provided with a connecting hole (42) through which the positioning pin (15) passes, and the gasket ring (4) is respectively provided with a corresponding connection to the first gas storage tank (111). a first through hole (43) and a second through hole (43A) corresponding to the second gas storage groove (111A), the gasket ring (4) preventing gas from escaping.

The air pressure adjusting member (5) is connected to the connecting tube (2), and the air pressure adjusting member (5) includes an adjusting ring body (51) [the adjusting ring body (51) has a detailed structure, see the fifth figure to the first 7], a pressure ring (52) and a stagnation ring (53), the adjusting ring body (51) is provided with an annular groove (511) corresponding to the air pressure ring (52) and a through hole Adjusting the perforations (512) of the ring body (51), the adjusting ring body (51) is respectively provided with a first air flow path (513) and a second air flow path (513A), and one for the positioning pin (15) a second positioning hole (514) penetrating, the positioning pin (15) fixing the gasket ring (4) between the adjusting ring body (51) and the connecting surface (11) of the gun body (1) to prevent sealing The backing ring (4) is moved, and the outer ring of the adjusting ring body (51) is provided with a ring wall (515) and a first fixing portion (516), and the adjusting ring body (51) is provided with an oblique airflow path. (517), the oblique airflow path (517) is connected to the second airflow path (513A), and the first airflow path (513) and the second airflow path (513A) are respectively connected to the first airflow path a hole (43) and the second through hole (43A), and the first air flow path (513) is connected to the annular groove (511), wherein the air pressure ring (52) is provided with a plurality of through holes (521), and the air holes (521) are equiangularly arranged annularly on the air pressure ring (52), and the air release ring (53) is correspondingly placed on the ring wall (515), the stagnation ring (53) is used to prevent gas from escaping from the outside of the adjusting ring body (51) to the outside, the adjusting ring body (51) A fastening portion (516) is an internal thread.

The nozzle member (6) is coupled to the air pressure adjusting member (5) and connected to the connecting tube (2). The nozzle member (6) includes an outer nozzle (61), an inner nozzle (62) and a fixing ring. (63) The outer nozzle (61) includes a receiving space (611) opposite to the inner nozzle (62), a first air flow passage (612), a gas jet port (613), and a gas jet hole ( 614), wherein the first airflow passage (612) and the air outlet (613) are connected to the accommodating space (611), and the air vent (614) is connected to the first airflow passage (612). The end of the nozzle (62) is provided with a joint portion (621) connecting the connecting portion (22), and the inner nozzle (62) is provided with a second air flow passage (622) corresponding to the oblique air flow passage (517). And a corresponding spray nozzle (623) penetrating into the air outlet (613), the fixing ring (63) is coupled to the outer side of the outer nozzle (61), and the fixing ring (63) is fixedly attached thereto a second fixing portion (631) of the first fixing portion (516).

It should be noted that, as shown in the second figure [and please refer to the first figure at the same time], in the process of the user screwing the inner nozzle (62), in order to prevent the nozzle (2) from being screwed at the same time The connecting hole (112) of the body (1) can be inserted into the flow channel (13) through the connecting hole (112) on the connecting surface (11) of the gun body (1) by the connecting pipe (2), and the connecting pipe ( 2) The fixing hole (21) is directly under the paint nozzle (14) of the gun body (1), and the user can pass the nozzle end (31) of the paint tube (3) through the paint port (14). And penetrate the fixing hole (21) of the connecting pipe (2), and the connecting pipe (2) is restricted by the receiving end (31) and cannot be rotated completely on the connecting hole (112), because the paint pipe ( 3) The connecting end (31) is fixed to the fixing hole (21) to make the connecting tube (2) fixed to the connecting hole (112) of the connecting surface (11), at this time, the connecting portion (22) of the connecting tube (2) is screwed to the joint portion (621) of the inner nozzle (62), and the user screw When the inner nozzle (62) is moved, the socket (2) cannot be screwed loosely on the joint hole (112) of the joint surface (11) to position the joint (2) on the joint surface of the gun body (1) ( 11) The effect of the position.

When the user adjusts the gas pressure by using the air pressure adjusting member (5), as shown in the fourth figure [and please refer to the first and third figures at the same time], the user can place the air pressure ring (52) correspondingly. Adjusting the annular groove (511) of the ring body (51), and adjusting the first air flow path (513) in the ring body (51) to the annular groove (511), the gas is from the gun body (1) After an air outlet (113) flows out, the gas can flow through the gas storage tank (111) of the connecting surface (11), and flow into the adjusting ring body through the first through hole (43) of the gasket ring (4) ( 51) in the air passage (513), and when the gas flows through the air passage (513) and flows in the annular groove (511), the gas can be ejected from the air hole (521) of the air pressure ring (52) and circulated outside. In the receiving space (611) of the nozzle (61), the air holes (521) are equally arranged annularly on the air pressure ring (52) to achieve uniform discharge of gas, and the user wants to adjust the gas to be ejected. When the pressure is large, the user can replace the air pressure ring (52) having different sizes of air holes (521), and insert the air pressure ring (52) into the annular groove (511) of the adjusting ring body (51), and adjust The ring body (51) does not need to be changed, and the air hole (521) is large. The small is inversely proportional to the air pressure system, and the air pressure (521) of the air pressure ring (52) is small, so that the pressure of the outflow gas is relatively large. If the air pressure needs to be adjusted, the user can replace the air hole (521) with a smaller air hole. The air pressure ring (52) is placed in the annular groove (511) of the adjusting ring body (51), and the air pressure (521) of the air ring (52) is larger, so that the pressure of the outflow gas is relatively higher. Small, if it is necessary to adjust the air pressure is small, the user can replace the air pressure ring (52) having a larger air hole (521); thus the user only needs to replace the air pressure ring (52) having different size air holes (521) in the ring Inside the slot (511) without the need for another The external air pressure adjusting member (5) is replaced by a whole group, so that the user can adjust the size of the air hole (521) of the air pressure ring (52) according to the needs of different painting materials to achieve the effect of adjusting the air pressure, and also facilitate the user to clean the gas adjustment. The stain in the piece (5) and the nozzle member (6) has the effects of reducing the cost of manufacturing the air pressure adjusting member (5) and saving the time for replacing the air pressure adjusting member (5).

When the first gas storage tank (111) and the second gas storage tank (111A) stabilize the air flow, as shown in the eighth figure [and please refer to the first and second figures at the same time], the air compressor [not shown in the figure) Presenting a gas to the gun body (1), the first air outlet hole (113) and the second air outlet hole (113A) are respectively disposed in the first gas storage tank (111) and the second gas storage tank (111A), The gas supplied from the gun body (1) to the first air outlet hole (113) and the second air outlet hole (113A) is ejected, and is tightly pressed by the adjusting ring body (51) and the gasket ring (4). a gas hole (113) and a second gas outlet hole (113A), wherein the first gas storage tank (111) and the second gas storage tank (111A) of the gun body (1) are spiraled to make the first gas storage tank The airflow in the (111) and the second gas storage tank (111A) respectively enters the first airflow path (513) and the second airflow path (513A) of the adjustment ring body (51) in a spiral direction, and utilizes the first storage The gas storage function of the gas tank (111) and the second gas storage tank (111A) can prevent the gas provided by the air compressor from directly impinging on the adjusting ring body (51), so that the gas is blocked in the first air outlet hole (113) And the second air outlet (113A) is not smooth, and the air compressor load is increased and more energy is consumed.

When the gas circulates in the air pressure adjusting member (5), as shown in the eighth figure [and please refer to the first and second figures at the same time], the gas system sprayed from the first air outlet (113) flows through the gasket. The first through hole (43) of the ring (4) flows to the first air flow path (513) of the adjusting ring body (51) because the first air flow path (513) communicates with the annular air channel (511) to circulate The gas of the first air flow path (513) can flow through the air holes (521) of the air pressure ring (52) to the first air flow path (612) of the outer nozzle (61), and is sprayed by the first air flow path (612). The air hole (614) flows out; the gas system sprayed by the second air outlet (113A) flows through the second through hole (43A) of the gasket ring (4), and then flows to the second air passage of the adjusting ring body (51) ( 513A), and the second airflow path (513A) is connected to the oblique airflow path (517), so that the gas flowing through the second airflow path (513A) first flows into the inner nozzle (62) from the oblique airflow path (517). Forming a cyclone, and allowing the airflow to flow through the second airflow passage (622) to the accommodating space (611) of the outer nozzle (61), and the airflow port (613) communicates with the accommodating space (611), the airflow It can be uniformly sprayed through the air vent (613), so that the airflow can be split to generate a balanced and stable airflow and gas pressure, so as to ensure the uniform and unbiased effect of the paint cross section controlled by the inner nozzle (62) and the outer nozzle (61). And by the cyclone provided by the oblique airflow path (517), the airflow suction sprayed by the painting port (613) sucks the paint in the flow channel (13) to reduce the paint in the gun body (1). The residual amount, in turn, avoids the solidification of the paint to facilitate cleaning of the flow passage (13) of the gun body (1).

However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications according to the scope of the present invention and the description of the invention are the present invention. Within the scope of the patent.

(1) ‧‧‧ gun body

(11)‧‧‧ Connection surface

(111)‧‧‧First gas storage tank

(111A)‧‧‧Second gas storage tank

(112)‧‧‧Contact holes

(113)‧‧‧First vent

(113A)‧‧‧Second air outlet

(114)‧‧‧First positioning hole

(13)‧‧‧ flow path

(14)‧‧‧ Painted nozzle

(15)‧‧‧Locating pins

(2) ‧ ‧ take over

(21) ‧‧‧Fixed holes

(22) ‧‧‧Connecting Department

(3) ‧‧‧ Painted tube

(31)‧‧‧ Receiver

(4) ‧ ‧ seal ring

(41)‧‧‧through holes

(42)‧‧‧Connecting holes

(43) ‧‧‧ first through hole

(43A)‧‧‧Second through hole

(5) ‧‧‧Pneumatic adjustment parts

(51) ‧‧‧Adjustment of the ring

(511) ‧‧‧ring groove

(512) ‧‧‧Perforation

(515) ‧ ‧ Circumference

(516) ‧ ‧ first fixed joint

(52) ‧‧‧Air pressure ring

(521) ‧‧‧ stomata

(53) ‧ ‧ stagnation ring

(6) ‧ ‧ nozzle parts

(61) ‧ ‧ outer nozzle

(613) ‧ ‧ vents

(614) ‧‧‧jet holes

(62) ‧ ‧ inner nozzle

(621) ‧ ‧ ‧ Joint Department

(623)‧‧‧Spray nozzle

(63)‧‧‧Fixed ring

(631)‧‧‧Second fixed joint

Claims (7)

The structure of a spray gun includes: a gun body, comprising a connecting surface, an adjusting needle bar, a first-class road and a paint port connected to the flow channel, the connecting surface is provided with a first storage a gas trough, a second gas storage tank and a connecting hole connected to the flow channel, wherein the connecting surface is respectively provided with a first air outlet hole in the first gas storage tank and a second air outlet hole in the second storage a connecting groove corresponding to the connecting hole of the gun body, the connecting pipe is provided with a pair of fixing holes connected to the paint connecting port, the connecting pipe is provided with a connecting portion; To the paint port of the gun body, one end of the paint strip is provided with a joint end corresponding to the fixing hole of the nozzle; a gasket ring is attached to the joint surface of the gun body, the seal The backing ring is provided with a through hole for the connecting pipe, and the sealing ring ring is respectively provided with a first through hole corresponding to the first gas storage groove and a second corresponding to the second gas storage groove a through hole; a gas pressure adjusting member is connected to the nozzle, the air pressure adjusting member comprises an adjusting ring body and a gas pressure ring, the adjusting The ring system is provided with an annular groove corresponding to the air pressure ring and a through hole extending through the adjusting ring body. The adjusting ring system is respectively provided with a first air flow channel and a second air flow channel, and the first air flow channel and the second air flow channel respectively The trajectory is respectively connected to the first through hole and the second through hole, and the first air flow channel is connected to the annular groove, and the air pressure ring is provided with a plurality of through holes; A nozzle member is coupled to the air pressure adjusting member and is coupled to the nozzle, and the nozzle member is provided with a joint portion connecting the connecting portion. The spray gun structure of claim 1, wherein the air holes are equiangularly arranged annularly on the air pressure ring. The structure of the spray gun of the second aspect of the invention, wherein the air pressure adjusting member is further provided with a stagnation sealing ring, and the outer ring of the adjusting ring body is provided with a ring wall, and the stagnation sealing ring corresponds to The sleeve is placed outside the ring wall. The structure of the spray gun of the third aspect of the invention, wherein the gun system is further provided with a positioning pin, and a connecting hole for the positioning pin is inserted into the connecting surface of the gun body, And the gasket ring is further provided with a connecting hole for the positioning pin to pass through, and the adjusting ring system is provided with a second positioning hole for the positioning pin to penetrate. The spray gun structure of claim 4, wherein the nozzle member comprises an outer nozzle, an inner nozzle and a fixing ring, and the joint portion is disposed at the inner nozzle end, the outer nozzle The fixing ring is disposed on the outer side of the outer nozzle, and the outer side of the adjusting ring is provided with a first fixing portion, and the fixing ring is fixedly attached thereto. a second fastening portion of the first fastening portion. The spray gun structure of claim 5, wherein the outer nozzle is provided with a first air flow passage, a gas jet port and a gas injection hole, wherein the first air flow passage and the air injection port are connected to the The accommodating space is connected to the first air flow channel, and the adjusting ring system is further provided with an oblique air flow channel, the oblique air flow channel is connected to the second air flow channel, and the inner nozzle is provided with a corresponding And a second air flow passage connected to the oblique air flow passage and a spray nozzle corresponding to the air injection opening. The structure of the spray gun of the sixth aspect of the invention, wherein the connecting portion of the connecting tube and the second fixing portion of the fixing ring are an internal thread, the joint portion of the inner nozzle and the adjusting ring body The first fastening portion is a thread corresponding to the external thread of the internal thread.