Spray gun

Abstract

The invention relates to a spray gun which comprises a nozzle assembly, a gun body and a spraying can, the nozzle assembly is installed on the gun body, and the spraying can is installed on the gun body and communicated with the nozzle assembly. The nozzle assembly comprises a valve element, a hood, an end plate and a locking nut, the end plate and the hood are installed at the front end of the gun body, the valve element is installed in an inner cavity of the gun body and stretches into the end plate and the hood, and the locking nut is arranged on the hood and the end plate in a sleeving mode and is in threaded connection with the gun body; one of the air cap and the end plate is provided with an elastic protrusion which is integrally arranged, the other one of the air cap and the end plate is provided with a plurality of grooves, and the grooves are used for containing the elastic protrusion. The spray shape of the spray gun can be adjusted by one hand, accurate positioning can be achieved by rotating the air cap once, and repeated adjustment is not needed.

Description

Technical Field

[0001] The present application relates to a spray gun, and in particular to an electric spray gun. Background Art

[0002] A spray gun is a tool that sprays liquid into mist. It is easier and more convenient to use, and the spraying effect is of high quality. Spray guns can be used in building decoration, car painting, etc. to improve work efficiency.

[0003] The nozzle assembly of the spray gun includes a valve core, a hood, an end plate and a locking nut. When the spray shape needs to be changed, first loosen the locking nut, turn the hood to a specific angle and hold it, then tighten the locking nut to fix the hood at the specific angle to spray the desired shape. Spray guns generally have three spray shapes: horizontal, vertical and circular.

[0004] The disadvantages of this solution are as follows: First, the position angle of the hood corresponding to different spray shapes is specific, and whether it is adjusted to the required position needs to be judged by the naked eye. In this way, there is an error between the final stop angle and the specific angle. If the error is large, it will affect the painting effect. Secondly, after adjusting the angle of the hood, you need to hold the hood with one hand and tighten the locking nut with the other hand, otherwise the hood will rotate with the rotation of the locking nut. If the rotation range is too large, the hood will deviate from the specific angle and cannot spray the required shape, and the hood angle needs to be readjusted. This operation method is not only inconvenient, but also easily causes the final fixed angle of the hood to be inappropriate, thus affecting the painting effect. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a spray gun capable of conveniently adjusting the spray shape.

[0006] The spray gun comprises: a nozzle assembly, a gun body and a spray pot, wherein the nozzle assembly is mounted on the gun body, and the spray pot is mounted on the gun body and communicated with the nozzle assembly;

[0007] The nozzle assembly includes a valve core, a wind cap, an end plate and a locking nut. The end plate and the wind cap are installed at the front end of the gun body. The valve core is installed in the inner cavity of the gun body and extends into the end plate and the wind cap. The locking nut is sleeved on the wind cap and the end plate and is threadedly connected to the gun body. One of the wind cap and the end plate has an integrally arranged elastic protrusion, and the other of the wind cap and the end plate is provided with a plurality of grooves, and the grooves are used to accommodate the elastic protrusions.

[0008] Furthermore, a nozzle is installed on the end plate and an air inlet is set, the nozzle extends into the wind hood, the gap between the wind hood and the nozzle forms a main air flow hole, the wind hood also has side air flow holes on both sides, the air inlet is connected with the main air flow hole, and rotating the wind hood can connect or close the air inlet with the side air flow holes to adjust the spray shape, and the elastic protrusion is accommodated in each of the grooves corresponding to a specific spray shape.

[0009] Further, the elastic protrusion is protrudingly arranged along an axial direction, and the axial direction is an air flow direction along the main air flow hole.

[0010] Furthermore, the elastic protrusion is triangular or arc-shaped.

[0011] Furthermore, the groove is square, arc-shaped or conical.

[0012] Furthermore, the air inlet of the end plate includes four evenly distributed openings, two elastic protrusions are provided, and the two elastic protrusions are symmetrically distributed, and at least three pairs of grooves are provided. When two elastic protrusions are respectively matched with a pair of the grooves, the side airflow holes are closed to the openings or connected to one of the pairs of openings, so that the hood is positioned to correspond to different spray shapes.

[0013] Furthermore, the elastic protrusion is arranged on the end plate, the groove is arranged on the hood, and the elastic protrusion faces the groove.

[0014] Furthermore, the air inlet of the end plate includes four evenly distributed openings, and the elastic protrusion and the openings are located on the same straight line, or the elastic protrusion is located on the angular bisector of two adjacent openings.

[0015] Furthermore, the elastic protrusion is arranged on the hood, the groove is arranged on the end plate, and the elastic protrusion faces the groove.

[0016] Furthermore, the present invention also relates to a spray gun, comprising: a nozzle assembly, a gun body and a spray pot, wherein the nozzle assembly is mounted on the gun body, and the spray pot is mounted on the gun body and communicated with the nozzle assembly;

[0017] The nozzle assembly includes a valve core, a wind cap, an end plate and a locking nut. The end plate and the wind cap are installed at the front end of the gun body. The valve core is installed in the inner cavity of the gun body and extends into the end plate and the wind cap. The locking nut is sleeved on the wind cap and the end plate and is threadedly connected to the gun body. An elastic protrusion extending radially is integrally provided on the side edge of the wind cap, and the gun body is provided with a plurality of grooves, which are used to accommodate the elastic protrusion.

[0018] Beneficial effects:

[0019] The nozzle assembly of the spray gun is provided with elastic protrusions and grooves, so when the user rotates the hood, the elastic protrusion produces a pressure, and the user feels a damping sensation. When the elastic protrusion is aligned with a groove, the elastic protrusion falls into the groove and makes a "click" sound, thus giving the user a tactile and auditory feedback: at this time, the hood rotates to a fixed angle, corresponding to a spray shape. This allows the user to quickly and accurately adjust the angle of the hood, and the hood only needs to be rotated once, without repeated adjustment.

[0020] In addition, since the elastic protrusion is embedded in the groove, the rotation of the hood will be hindered to a certain extent. At this time, when the locking nut is tightened, the hood will no longer rotate with the locking nut, so it will not affect the final position of the hood and cause errors in the final shape of the spray. Therefore, the user can use one hand to rotate the hood to the specified position, and then use the same hand to tighten the locking nut to fix the position of the hood. That is, the user can complete the operation with one hand, so it is more convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1a Schematic diagram of a spray gun in an embodiment of the present invention.

[0022] Figure 1b 2 is a cross-sectional view of a spray gun according to an embodiment of the present invention.

[0023] Figure 1c yes Figure 1b A partial enlarged view of the .

[0024] Figure 2 It is a schematic diagram of the explosion of the spray gun in the first embodiment of the present invention.

[0025] Figure 3a It is a schematic diagram of the end plate in the first embodiment of the present invention.

[0026] Figure 3b It is a schematic diagram of the end plate from another perspective in the first embodiment of the present invention.

[0027] Figure 4 It is a schematic diagram of the hood in the first embodiment of the present invention.

[0028] Figure 5 It is a partial schematic diagram of the hidden locking nut of the spray gun in the first embodiment of the present invention.

[0029] Figure 6 It is a schematic diagram of the hood in the second embodiment of the present invention.

[0030] Figure 7 It is a schematic diagram of the end plate in the second embodiment of the present invention.

[0031] Figure 8It is a partial schematic diagram of the hidden locking nut of the spray gun in the third embodiment of the present invention. DETAILED DESCRIPTION

[0032] Here, exemplary embodiments will be described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application.

[0033] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one" or "one" do not indicate quantity restrictions, but indicate that there is at least one. "Multiple" or "several" means two and more than two. Unless otherwise specified, similar words such as "front", "rear", "lower" and / or "upper" are only for convenience of explanation and are not limited to one position or one spatial orientation. Similar words such as "include" or "include" mean that the elements or objects appearing in front of "include" or "include" include the elements or objects listed after "include" or "include" and their equivalents, and do not exclude other elements or objects. Similar words such as "connect" or "connected" are not limited to physical or mechanical connections, and can include electrical connections, whether direct or indirect. The singular forms "a", "said" and "the" used in this specification and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0034] like Figure 1a As shown, the present invention provides a spray gun 100. The basic structure of the spray gun 100 follows the functional structure of the existing spray gun 100. The spray gun 100 includes a nozzle assembly 1, a gun body 2 and a spray pot 3. The nozzle assembly 1 is mounted on the gun body 2, and the spray pot 3 is mounted on the gun body 2 and communicated with the nozzle assembly 1 through a liquid inlet channel. A motor is provided inside the gun body 2, and a trigger is provided outside the gun body 2 to control the liquid inlet function. The liquid in the spray pot 3 enters the nozzle assembly 1, mixes with the gas entering the gun body 2 from the outside, and then is sprayed out.

[0035] This embodiment improves the nozzle assembly 1 of the spray gun 100 so that the nozzle assembly 1 can adjust the spray shape more conveniently and reliably.

[0036] Embodiment 1

[0037] Combination Figure 2 As shown, the nozzle assembly 1 includes a valve core 11, a wind cap 12, an end plate 13 and a locking nut 14. The interior of the gun body 2 has an inner peripheral wall 21 forming an inner cavity, and the inner cavity is connected to the spray pot 3 through a liquid inlet channel. The valve core 11 is accommodated in the inner cavity of the gun body 2. The end plate 13 and the wind cap 12 are installed to the front end of the gun body 2.

[0038] The end plate 13 is disposed between the gun body 2 and the wind cap 12. The locking nut 14 is sleeved on the wind cap 12 and the end plate 13 and is threadedly connected to the gun body 2. The locking nut 14 is used to lock or release the wind cap 12 so that the wind cap 12 can be fixed or rotated relative to the gun body 2.

[0039] Combination Figure 3a and 3b As shown, the end plate 13 has an integrally formed disc 130 and a sleeve 131, the sleeve 131 is coaxially arranged with the disc 130, and the outer diameter of the sleeve 131 is smaller than the outer diameter of the disc 130. The disc 130 and the sleeve 131 are connected by a plurality of connecting ribs 1301 to strengthen the strength of the end plate 13. Preferably, connecting ribs 1301 are provided on both the front and back sides of the disc 130 to connect the sleeve 131. The sleeve 131 extends in the axial direction, and the disc 130 and the sleeve 131 are provided with coaxial through holes.

[0040] Combination Figure 1b , 1c As shown, the end plate 13 is fixedly mounted to the end face of the front end of the gun body 2. The inner peripheral wall 21 of the gun body 2 is inserted into the sleeve 131, so that the inner cavity of the gun body 2 is connected with the through hole of the sleeve 131. A nozzle 111 is installed in the through hole of the sleeve 131, and the nozzle 111 extends out of the through hole of the disc 130. The nozzle 111 is also sleeved on the front end of the valve core 11, so that the liquid in the inner cavity can be sprayed out from the nozzle 111. The disc 130 of the end plate 13 can cover the front end face of the gun body 2.

[0041] The end plate 13 is also provided with an air inlet, which includes an annular gap between the disc 130 and the sleeve 131, and a plurality of openings 132 provided on the disc 130. The openings 132 are in communication with the annular gap.

[0042] like Figure 2 and 3a As shown, the disk 130 of the end plate 13 also has an elastic protrusion 133 integrally arranged thereon.

[0043] Combination Figure 2 and 4As shown, the hood 12 has a through hole 120 located in the center, and the nozzle 111 extends into the through hole 120 of the hood 12. There is a gap between the side wall forming the through hole 120 and the nozzle 111, and the gap forms a main air flow hole 121. The hood 12 also includes corners located on both sides, and each corner is provided with a side air flow hole 122. The back of the hood 12 is also provided with a plurality of grooves 123, and the grooves 123 are used to accommodate the elastic protrusions 133 of the end plate 13.

[0044] Preferably, a plurality of reinforcing ribs 1201 are further provided on the side wall of the through hole 120 forming the hood 12 , and the reinforcing ribs 1201 are used to clamp the nozzle 111 .

[0045] The main air flow hole 121 of the hood 12 is connected to the air inlet of the end plate 13 to form a first air flow channel. The side air flow hole 122 of the hood 12 is connected to the air inlet of the end plate 13 to form a second air flow channel. The hood 12 can be rotated to connect or close the air inlet of the end plate 13 to the side air flow hole 122 to adjust the shape of the spray.

[0046] Combination Figure 5 As shown, when the shape of the spray needs to be changed, the user can first slightly loosen the locking nut 14 so that the hood 12 has room to rotate, and then rotate the hood 12 to change the angle position of the hood 12 relative to the end plate 13, so that the side airflow hole 122 is closed or connected with the air inlet to change the spray shape. When the hood 12 is rotated, the elastic protrusion 133 on the end plate 13 abuts against the back of the hood 12, slightly interfering, and the elastic protrusion 133 is slightly deformed, so the user will feel damping when rotating the hood 12. When the elastic protrusion 133 is aligned with one of the grooves 123 of the hood 12, the elastic protrusion 133 falls into the groove 123 and makes a "click" sound, so the user will have a feedback in terms of touch and hearing: at this time, the hood 12 rotates to a fixed angle, corresponding to a spray shape. This allows the user to quickly and accurately adjust the angle of the hood 12, and the hood 12 can be rotated once without repeated adjustment.

[0047] In addition, after the elastic protrusion 133 is ejected into the groove 123, the rotation of the hood 12 will be hindered to a certain extent. At this time, when the locking nut 14 is tightened, the hood 12 will no longer rotate with the locking nut 14, so it will not affect the final position of the hood 12, causing errors in the final shape of the spray. Therefore, the user can rotate the hood 12 to the specified position with one hand, and then tighten the locking nut 14 with the same hand to fix the position of the hood 12. That is, the user can complete the operation with one hand, so it is more convenient to operate.

[0048] Specifically, in this embodiment, as shown in FIGS. 3 and 5 , the elastic protrusion 133 is arranged to protrude along the axial direction, and the axial direction is the flow direction of the gas in the first air flow channel.

[0049] Preferably, the elastic protrusion 133 is triangular or arc-shaped to facilitate the elastic protrusion 133 to fall into and cross the groove 123.

[0050] Preferably, the groove 123 is square, arc-shaped or conical to match the elastic protrusion 133 .

[0051] The arrangement and number of the elastic protrusions 133 are not limited in this embodiment, and the arrangement can be symmetrical or asymmetrical. The number of the elastic protrusions 133 can be 2 or 4, etc. The arrangement and number of the elastic protrusions 133 can be any arrangement as long as the hood 12 can be limited to a specific angle.

[0052] Specifically, in this embodiment, two elastic protrusions 133 are provided, and the two elastic protrusions 133 are symmetrically distributed.

[0053] In this embodiment, if Figure 3a As shown, the air inlet of the end plate 13 includes two pairs of openings 132, and the four openings 132 are evenly distributed, that is, the four openings 132 are cross-shaped. Preferably, the elastic protrusion 133 and the opening 132 are located on the same straight line, or the elastic protrusion 133 is located on the angle bisector of two adjacent openings 132.

[0054] At least three pairs of grooves 123 are provided, and two elastic protrusions 133 cooperate with a pair of grooves 123 respectively to position the hood 12 relative to the end plate 13, that is, to determine the connectivity between the side air flow holes 122 of the hood 12 and each pair of openings 132 of the end plate 13, so that the elastic protrusions 133 cooperate with different pairs of grooves 123 to correspond to different spray shapes: circular, horizontal, and vertical.

[0055] In this embodiment, if Figure 4 As shown, there are four pairs of grooves 123, which are evenly distributed on the back of the hood 12. Therefore, when the hood 12 rotates 45 degrees, a pair of grooves 123 can cooperate with the elastic protrusions 133 to limit the hood 12 to a specific position and form a corresponding spray shape.

[0056] Embodiment 2

[0057] Combination Figure 6 and 7As shown, the difference between the second embodiment and the first embodiment is that the elastic protrusion 223 is provided on the hood 22, and the groove 233 is provided on the end plate 23. Similarly, the elastic protrusion 223 extends in the axial direction and is provided toward the groove 233. Therefore, when the hood 22 is rotated, the user can feel the damping due to the interference between the elastic protrusion 223 and the end plate 23. When the elastic protrusion 223 is aligned with one of the grooves 233 of the end plate 23, the elastic protrusion 223 falls into the groove 233 and makes a "click" sound, which gives the user a tactile and auditory feedback that the hood 22 has been rotated to the specified position.

[0058] Embodiment 3

[0059] like Figure 8 As shown, the difference between the second embodiment and the first embodiment is that the elastic protrusion 323 is integrally arranged on the side edge of the hood 32 , and the groove 20 is arranged on the gun body 2 , and the elastic protrusion 323 cooperates with the groove 20 .

[0060] Specifically, the elastic protrusion 323 extends in the radial direction. The groove 20 is configured as a notch groove opened on the outer shell of the gun body 2, and the elastic protrusion 323 can be inserted into the notch groove.

[0061] The above is only a preferred embodiment of the present application and does not constitute any form of limitation to the present application. Although the present application has been disclosed as a preferred embodiment as above, it is not intended to limit the present application. Any technician familiar with the profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present application. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application still falls within the scope of the technical solution of the present application.

Claims

1. A spray gun, characterized in that: include: A nozzle assembly, a gun body and a spray pot, wherein the nozzle assembly is mounted on the gun body, and the spray pot is mounted on the gun body and communicated with the nozzle assembly; The nozzle assembly includes a valve core, a wind cap, an end plate and a locking nut. The end plate and the wind cap are installed at the front end of the gun body. The valve core is installed in the inner cavity of the gun body and extends into the end plate and the wind cap. The locking nut is sleeved on the wind cap and the end plate and is threadedly connected to the gun body. One of the wind cap and the end plate has an integrally arranged elastic protrusion, and the other of the wind cap and the end plate is provided with a plurality of grooves, and the grooves are used to accommodate the elastic protrusions.

2. The spray gun according to claim 1, characterized in that A nozzle is installed on the end plate and an air inlet is set. The nozzle extends into the wind hood. The gap between the wind hood and the nozzle forms a main air flow hole. The wind hood also has side air flow holes on both sides. The air inlet is connected to the main air flow hole. Rotating the wind hood can connect or close the air inlet to the side air flow holes to adjust the spray shape. The elastic protrusion is accommodated in each of the grooves corresponding to a specific spray shape.

3. The spray gun according to claim 2, characterized in that The elastic protrusion is protrudingly arranged along an axial direction, and the axial direction is an air flow direction along the main air flow hole.

4. The spray gun according to claim 2, characterized in that The elastic protrusion is triangular or arc-shaped.

5. The spray gun according to claim 2, characterized in that The groove is in a square shape, an arc shape or a cone shape.

6. The spray gun according to claim 2, characterized in that The air inlet of the end plate includes four evenly distributed openings, two elastic protrusions are provided, and the two elastic protrusions are symmetrically distributed, and at least three pairs of grooves are provided. When two elastic protrusions are respectively matched with a pair of the grooves, the side air flow holes are closed to the openings or connected to one pair of the openings, so that the hood is positioned to correspond to different spray shapes.

7. The spray gun according to any one of claims 2 to 6, characterized in that: The elastic protrusion is arranged on the end plate, the groove is arranged on the hood, and the elastic protrusion faces the groove.

8. The spray gun according to claim 7, characterized in that The air inlet of the end plate includes four evenly distributed openings, and the elastic protrusion and the openings are located on the same straight line, or the elastic protrusion is located on the angular bisector of two adjacent openings.

9. The spray gun according to any one of claims 2 to 6, characterized in that: The elastic protrusion is arranged on the hood, the groove is arranged on the end plate, and the elastic protrusion faces the groove.

10. A spray gun, characterized in that: include: A nozzle assembly, a gun body and a spray pot, wherein the nozzle assembly is mounted on the gun body, and the spray pot is mounted on the gun body and communicated with the nozzle assembly; The nozzle assembly includes a valve core, a wind cap, an end plate and a locking nut. The end plate and the wind cap are installed at the front end of the gun body. The valve core is installed in the inner cavity of the gun body and extends into the end plate and the wind cap. The locking nut is sleeved on the wind cap and the end plate and is threadedly connected to the gun body. An elastic protrusion extending radially is integrally provided on the side edge of the wind cap, and the gun body is provided with a plurality of grooves, which are used to accommodate the elastic protrusion.

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