CN221808670U - Spray gun - Google Patents

Abstract

The present application discloses a spray gun, including a spray gun body and a trigger, the spray gun body including a handle portion and including a first side and a second side opposite to each other, the spray gun body including a first side flat surface and a second side flat surface located on the handle portion and including a front connection surface and a rear connection surface, the front connection surface is located behind the trigger in the length direction of the spray gun, the front connection surface includes a first front flat connection surface and a second front flat connection surface connected to each other and inclined relative to each other, the first front flat connection surface is connected between the first side flat surface and the second front flat connection surface, and the second front flat connection surface is connected between the second side flat surface and the first front flat connection surface. According to the arrangement of the present application, the spray gun body with these flat surfaces is easy to manufacture, especially forging, has a good appearance and is ergonomic.

Description

spray gun

Technical Field

The present application relates to a spray gun, and more particularly to a spray gun for spraying paint.

Background Art

A spray gun is a common tool used in industry, for example, it can be used to spray paint onto the surfaces of various objects such as furniture, machinery and especially vehicles. A spray gun can include a spray gun body that is held by a user during use, and various attachment components connected to the spray gun body, such as a spray width control assembly, a nozzle assembly, a trigger assembly, an air micrometer assembly, a swivel assembly, an air discharge assembly, a paint needle assembly, a pressure measuring device, etc.

In existing spray guns, the spray gun body is often manufactured to have a smooth transition. However, such an arrangement makes the spray gun body difficult to manufacture.

Utility Model Content

In order to overcome the above-mentioned defects existing in the prior art, the present application provides a spray gun, the spray gun comprising a spray gun body and a trigger connected to the spray gun body, the spray gun body comprising a handle portion for being held by a user, and comprising a first side and a second side opposite to each other, the spray gun body comprising: a first side flat surface and a second side flat surface located on the handle portion, the first side flat surface being located on the first side of the spray gun body, the first side flat surface comprising a front edge and a rear edge in the length direction of the spray gun, the second side flat surface being located on the second side of the spray gun body and opposite to the first side flat surface, and the second side flat surface comprising a front edge and a rear edge in the length direction of the spray gun edge; and a front connecting surface and a rear connecting surface, the front connecting surface is connected between the front edge of the first side flat surface and the front edge of the second side flat surface, the rear connecting surface is connected between the rear edge of the first side flat surface and the rear edge of the second side flat surface, the front connecting surface is located behind the trigger in the length direction of the spray gun, and the front connecting surface includes a first front flat connecting surface and a second front flat connecting surface connected to each other and inclined relative to each other, the first front flat connecting surface is connected between the first side flat surface and the second front flat connecting surface, and the second front flat connecting surface is connected between the second side flat surface and the first front flat connecting surface.

Further, the first side flat surface and the second side flat surface are mirror-symmetrical with respect to a mid-longitudinal section of the spray gun, and/or the first front flat connecting surface and the second front flat connecting surface are mirror-symmetrical with respect to a mid-longitudinal section of the spray gun.

Further, an angle between the first side flat surface and the first front flat connecting surface is in a range of 110° to 150°, and/or an angle between the second side flat surface and the second front flat connecting surface is in a range of 110° to 150°.

Further, an angle between the first side flat surface and the first front flat connecting surface is in a range of 125° to 130°, and/or an angle between the second side flat surface and the second front flat connecting surface is in a range of 125° to 130°.

Further, the front connecting surface further includes a third front flat connecting surface connected between the first front flat connecting surface and the second front flat connecting surface, and the third front flat connecting surface is parallel to a width direction of the spray gun.

Further, the spray gun also includes a platform portion extending forward from the handle portion in the length direction of the spray gun, the platform portion having a top surface and a bottom surface opposite to each other, the top surface of the platform portion being lower than the trigger in the height direction of the spray gun, and the first front flat connecting surface, the second front flat connecting surface, and the third front flat connecting surface extending from an area of the handle portion located behind the trigger to the top surface of the platform portion.

Further, the first front flat connecting surface, the second front flat connecting surface and the third front flat connecting surface continue from the top surface of the platform portion to the bottom surface of the platform portion and further continue to the bottom of the handle portion.

Further, the handle portion also includes a first front transition connection surface and a second front transition connection surface, the first front transition connection surface is connected between the first side flat surface and the first front flat connection surface, and the second front transition connection surface is connected between the second side flat surface and the second front flat connection surface, and either of the first front transition connection surface and the second front transition connection surface is flat or curved.

Further, the rear connecting surface includes a first rear flat connecting surface and a second rear flat connecting surface which are connected to each other and inclined relative to each other, the first rear flat connecting surface is connected between the first side flat surface and the second rear flat connecting surface, and the second rear flat connecting surface is connected between the second side flat surface and the first rear flat connecting surface.

Further, the first rear flat connecting surface and the second rear flat connecting surface are mirror-symmetrical with respect to a mid-longitudinal section of the spray gun.

Further, an angle between the first side flat surface and the first rear flat connecting surface is in a range of 110° to 150°, and/or an angle between the second side flat surface and the second rear flat connecting surface is in a range of 110° to 150°.

Further, an angle between the first side flat surface and the first rear flat connecting surface is in a range of 130° to 135°, and/or an angle between the second side flat surface and the second rear flat connecting surface is in a range of 130° to 135°.

Further, the rear connecting surface further includes a third rear flat connecting surface connected between the first rear flat connecting surface and the second rear flat connecting surface, and the third rear flat connecting surface is parallel to a width direction of the spray gun.

Further, the handle portion also includes a first rear transition connection surface and a second rear transition connection surface, the first rear transition connection surface is connected between the first rear flat connection surface and the third rear flat connection surface, and the second rear transition connection surface is connected between the second rear flat connection surface and the third rear flat connection surface, and either of the first rear transition connection surface and the second rear transition connection surface is flat or curved.

Further, the spray gun body also includes two first step portions, which are respectively arranged on the first side and the second side of the spray gun body and are mirror-symmetrical with respect to the mid-longitudinal section of the spray gun, and the two first step portions are located at the top of the handle portion. The spray gun body also includes a third side flat surface and a fourth side flat surface, the third side flat surface is located on the first side of the spray gun body, and the fourth side flat surface is located on the second side of the spray gun body, the first side flat surface is connected to the third side flat surface through one of the two first step portions, and the second side flat surface is connected to the fourth side flat surface through the other of the two first step portions.

Further, in the extending direction of the handle portion, an extending length of the first side flat surface and/or the second side flat surface is greater than 50% of a total length from the top of the handle portion to the bottom of the handle portion.

Further, the spray gun body also includes two second step portions, which are respectively arranged on the first side and the second side of the spray gun body and are mirror-symmetrical with respect to the mid-longitudinal section of the spray gun, the spray gun body also includes a fifth side flat surface and a sixth side flat surface, the fifth side flat surface is located on the first side of the spray gun body, and the sixth side flat surface is located on the second side of the spray gun body, the third side flat surface is connected to the fifth side flat surface through one of the two second step portions, and the fourth side flat surface is connected to the sixth side flat surface through the other of the two second step portions.

Further, the spray gun body also includes two recesses located on the handle portion and recessed inward from the corresponding side surfaces of the handle portion, one of the two recesses is located on the first side of the spray gun body, and the other of the two recesses is located on the second side of the spray gun body, each of the two recesses includes a recess bottom surface and a plurality of recess side surfaces connected between the recess bottom surface and the corresponding side surfaces, and is lower than the platform portion in the height direction of the spray gun.

Furthermore, the bottom surface of the recess is flat.

Further, the recess bottom surface includes a first recess bottom surface and a second recess bottom surface connected to each other and inclined relative to each other, and each of the first recess bottom surface and the second recess bottom surface is flat.

According to the arrangement of the present application, the spray gun body with these flat surfaces is easy to manufacture (especially forging), has a good appearance and is ergonomic.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the accompanying drawings:

FIG1 is a schematic perspective view showing a spray gun according to the present application;

FIG2 is a schematic side view showing a spray gun according to the present application;

FIG3 is a schematic perspective view showing a spray gun according to the present application;

FIG4 is a schematic perspective view showing a handle portion of a spray gun according to the present application;

FIG5 is a schematic top view showing the handle portion in FIG4 ;

FIG6 is a schematic exploded view showing the spray gun of the present application;

FIG7 is a schematic longitudinal cross-sectional view showing the spray gun of the present application; and

FIG. 8 is a detailed diagram showing a block portion in FIG. 7 .

Reference numerals

100 spray gun

10 Spray gun body

101 Air Chamber

110 Intake channel

1. Handle

11 First side flat surface

12 Second side flat surface

11' Third side flat surface

12' Fourth side flat surface

11” fifth side flat surface

12” flat surface on the sixth side

13 Front connection surface

131 first front flat connecting surface

132 second front flat connecting surface

133 Third front flat connecting surface

14 Rear connection surface

141 first rear flat connection surface

142 second rear flat connection surface

143 Third rear flat connection surface

15 First front transition surface

16 Second front transition surface

17 First rear transition surface

18 Second rear transition surface

2 First step

2' Second step

3 Platform Department

31 Top surface

32 bottom surface

4 Concave

41 concave bottom surface

411 First concave bottom surface

412 Second recess bottom surface

42 Concave side surface

α1, α2 angle

β1, β2 angle

20 Spray width control components

201 Spray width control knob

202 Spray Control Room

30 Nozzle assembly

301 Paint Nozzle Seal

302 Paint Nozzle

303 Air Cap

304 retaining ring

305 Air cap ring

40 Trigger Components

401 Trigger

401a Connecting arm

401b Joint parts

402 Pin

403 Sealing ring

404 Snap Ring

405 Screws

406 Pin Cover

50 Air Micrometer Assembly

501 Air Control Knob

502 Control sleeve

503a, 503b Sealing ring

504 Lower end

60 Rotary Joint Assembly

601 Rotating parts

602 Ball

603 Closure Plug

70 Air exhaust assembly

701 Bushing

701a First end

701b Second terminal

701c Intermediate Ring

705 Air Piston

705a Collar

706 Gap

707 Spring

708a First sealing element

708b Second sealing element

708c Third sealing element

708d Fourth sealing element

709 Valve sleeve

80 Paint Needle Assembly

801 coating needle

802 Actuator

803 Spring

804 Material Flow Control Knob

804a External part

804b Internal Section

90 Pressure measuring device

X width direction

Y length direction

Z height direction

DETAILED DESCRIPTION

The technical solutions in the embodiments of the present application will be described in detail below in conjunction with the drawings in the embodiments of the present application. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

In the following detailed description, reference is made to the accompanying drawings that form a part of this specification, in which specific embodiments in which the present application can be implemented are shown by way of example. With respect to the accompanying drawings, directional terms such as "top", "bottom", "inside", "outside", "up", "down", "front", "back" and the like are used with reference to the directions of the accompanying drawings described. Since the components of the embodiments of the present application can be placed in many different directions, the directional terms are only used for illustration and are not intended to be limiting. It should be understood that other embodiments may be used and that structural or logical changes may be made without departing from the scope of the present application. Therefore, the following detailed description should not be understood as limiting, and the present application is defined by the appended claims.

With reference to the spray gun 100 shown in the drawings, it can be understood that the spray gun 100 can have a substantially similar or symmetrical structure on the first side and the second side opposite to each other. The directional terms used in the present application are exemplified for the orientation of the spray gun 100 shown in the drawings, wherein, as shown in the coordinate system in the drawings, X represents the width direction or lateral direction of the spray gun 100, for example, the spray control knob 201 of the spray control assembly 20 is located outside the spray gun body 10 in the width direction or lateral direction, Y represents the length direction or front-to-back direction of the spray gun 100, for example, the nozzle assembly 30 is located in front of the spray gun body 10 in the length direction or front-to-back direction, and Z represents the height direction or up-down direction of the spray gun 100, for example, the handle portion 1 is located at the lower part of the spray gun body 10.

As shown in Fig. 1, the present application discloses a spray gun 100. The spray gun 100 may include a spray gun body 10 and a trigger 401 connected to the spray gun body 10. The spray gun body 10 may include a handle portion 1 for holding by a user, and includes a first side and a second side opposite to each other.

As shown in combination with Figures 1 to 5, the spray gun body 10 may include a first side flat surface 11 and a second side flat surface 12 located on the handle portion 1. The first side flat surface 11 is located on a first side of the spray gun body 10, and the first side flat surface 11 includes a front edge and a rear edge in the length direction Y of the spray gun 100, and the second side flat surface 12 is located on a second side of the spray gun body 10 and is opposite to the first side flat surface 11, and the second side flat surface 12 includes a front edge and a rear edge in the length direction Y of the spray gun 100.

The spray gun body 10 may further include a front connection surface 13 and a rear connection surface 14. The front connection surface 13 is connected between the front edge of the first side flat surface 11 and the front edge of the second side flat surface 12, and the rear connection surface 14 is connected between the rear edge of the first side flat surface 11 and the rear edge of the second side flat surface 12.

The front connection surface 13 is located behind the trigger 401 in the length direction Y of the spray gun 100, and includes a first front flat connection surface 131 and a second front flat connection surface 132 connected to each other and inclined relative to each other. The first front flat connection surface 131 is connected between the first side flat surface 11 and the second front flat connection surface 132, and the second front flat connection surface 132 is connected between the second side flat surface 12 and the first front flat connection surface 131.

A "flat" surface referred to herein may have a slight curvature that may be due to manufacturing processes or tolerances and is not visible to the naked eye but may be measured.

In one embodiment, the first side flat surface 11 and the second side flat surface 12 may be mirror-symmetrical with respect to a middle longitudinal section of the spray gun 100 .

In one embodiment, the first front flat connecting surface 131 and the second front flat connecting surface 132 may be mirror-symmetrical with respect to a middle longitudinal section of the spray gun 100 .

In one embodiment, the angle α1 between the first side flat surface 11 and the first front flat connecting surface 131 may be in the range of 110° to 150°, and in particular in the range of 125° to 130°.

In one embodiment, the angle α2 between the second side flat surface 12 and the second front flat connecting surface 132 may be in the range of 110° to 150°, and in particular, in the range of 125° to 130°.

In one embodiment, the front connection surface 13 may further include a third front flat connection surface 133 connected between the first front flat connection surface 131 and the second front flat connection surface 132. The third front flat connection surface 133 is parallel to the width direction X of the spray gun 100.

In one embodiment, the spray gun 100 may further include a platform portion 3 extending forward from the handle portion 1 in the length direction Y of the spray gun 100. The platform portion 3 has a top surface 31 and a bottom surface 32 opposite to each other. The top surface 31 of the platform portion 3 is lower than the trigger 401 in the height direction Z of the spray gun 100. The first front flat connecting surface 131, the second front flat connecting surface 132, and the third front flat connecting surface 133 may continue from the area of the handle portion 1 located behind the trigger 401 to the top surface 31 of the platform portion 3.

In one embodiment, the first front flat connecting surface 131 , the second front flat connecting surface 132 , and the third front flat connecting surface 133 may continue from the top surface 31 of the platform portion 3 to the bottom surface 32 of the platform portion 3 and may further continue to the bottom of the handle portion 1 .

In one embodiment, the handle portion 1 may further include a first front transition connection surface 15 and a second front transition connection surface 16. The first front transition connection surface 15 is connected between the first side flat surface 11 and the first front flat connection surface 131, and the second front transition connection surface 16 is connected between the second side flat surface 12 and the second front flat connection surface 132. Either of the first front transition connection surface 15 and the second front transition connection surface 16 may be flat or curved.

In one embodiment, the rear connection surface 14 may include a first rear flat connection surface 141 and a second rear flat connection surface 142 connected to each other and inclined relative to each other. The first rear flat connection surface 141 is connected between the first side flat surface 11 and the second rear flat connection surface 142, and the second rear flat connection surface 142 is connected between the second side flat surface 12 and the first rear flat connection surface 141.

In one embodiment, the first rear flat connecting surface 141 and the second rear flat connecting surface 142 may be mirror-symmetrical with respect to a middle longitudinal section of the spray gun 100 .

In one embodiment, the angle β1 between the first side flat surface 11 and the first rear flat connecting surface 141 may be in the range of 110° to 150°, and in particular in the range of 130° to 135°.

In one embodiment, the angle β2 between the second side flat surface 12 and the second rear flat connecting surface 142 may be in the range of 110° to 150°, and specifically in the range of 130° to 135°.

In one embodiment, the rear connecting surface 14 may further include a third rear flat connecting surface 143 connected between the first rear flat connecting surface 141 and the second rear flat connecting surface 142. The third rear flat connecting surface 143 is parallel to the width direction X of the spray gun 100.

In one embodiment, the handle portion 1 may further include a first rear transition connection surface 17 and a second rear transition connection surface 18. The first rear transition connection surface 17 is connected between the first rear flat connection surface 141 and the third rear flat connection surface 143, and the second rear transition connection surface 18 is connected between the second rear flat connection surface 142 and the third rear flat connection surface 143. Either of the first rear transition connection surface 17 and the second rear transition connection surface 18 may be flat or curved.

In one embodiment, the spray gun body 10 may further include two first step portions 2. The two first step portions 2 are respectively disposed on the first side and the second side of the spray gun body 10 and are mirror-symmetrical with respect to the middle longitudinal section of the spray gun 100. The two first step portions 2 may be located at the top of the handle portion 1. The spray gun body 10 may further include a third side flat surface 11' and a fourth side flat surface 12'. The third side flat surface 11' is located on the first side of the spray gun body 10, and the fourth side flat surface 12' is located on the second side of the spray gun body 10. The first side flat surface 11 may be connected to the third side flat surface 11' through one of the two first step portions 2, and the second side flat surface 12 may be connected to the fourth side flat surface 12' through the other of the two first step portions 2.

In one embodiment, in the extension direction of the handle portion 1 , the extension length of the first side flat surface 11 and/or the second side flat surface 12 may be greater than 50% of the total length from the top of the handle portion 1 to the bottom of the handle portion 1 .

In one embodiment, the spray gun body 10 may further include two second step portions 2'. The two second step portions 2' are respectively disposed on the first side and the second side of the spray gun body 10 and are mirror-symmetrical with respect to the mid-longitudinal section of the spray gun 100. The spray gun body 10 may further include a fifth side flat surface 11" and a sixth side flat surface 12". The fifth side flat surface 11" is located on the first side of the spray gun body 10, and the sixth side flat surface 12" is located on the second side of the spray gun body 10. The third side flat surface 11' may be connected to the fifth side flat surface 11" through one of the two second step portions 2', and the fourth side flat surface 12' may be connected to the sixth side flat surface 12" through the other of the two second step portions 2'.

In one embodiment, the spray gun body 10 may further include two recesses 4 located on the handle portion 1 and recessed inward from the corresponding side surfaces of the handle portion 1. One of the two recesses 4 is located on the first side of the spray gun body 10, and the other of the two recesses 4 is located on the second side of the spray gun body 10. Each of the two recesses 4 may include a recess bottom surface 41 and a plurality of recess side surfaces 42 connected between the recess bottom surface 41 and the corresponding side surface, and is lower than the platform portion 3 in the height direction Z of the spray gun 100.

In one embodiment, the recess bottom surface 41 may be flat.

In one embodiment, the recess bottom surface 41 may include a first recess bottom surface 411 and a second recess bottom surface 412 connected to each other and inclined relative to each other. Each of the first recess bottom surface 411 and the second recess bottom surface 412 may be flat.

6 to 8 show more structural details of the spray gun 100 of the present application, which will be described in more detail below.

The spray width control assembly 20 may be used to adjust the shape of the spray jet generated by the spray gun 100. The spray width control assembly 20 may include a spray width control knob 201 for operation by a user to adjust the shape of the spray jet.

The nozzle assembly 30 may include a paint nozzle seal 301, a paint nozzle 302 screwed into the spray gun body 10, an air cap 303, a retaining ring 304, and an air cap ring 305. The retaining ring 304 is used to retain the air cap 303 in the air cap ring 305 so that rotation of the air cap 303 in the air cap ring 305 is possible, but axial movement of the air cap 303 in the air cap ring 305 is impossible.

The spray gun 100 may further include a trigger assembly 40, by means of which the spray gun 100 may be activated. The trigger assembly 40 includes a trigger 401, which in the illustrated embodiment has one connecting arm 401a, and the trigger 401 can be connected to the spray gun body 10 via the connecting arm 401a. However, the present application is not limited thereto, and the trigger assembly 40 may also have two connecting arms. The trigger 401 is clamped between a pin 402 and a screw 405, and the pin 402 has a sealing ring 403 near one side thereof adjacent to the trigger 401 and a snap ring 404 near its end away from the trigger 401, which is a C-shaped ring in the illustrated embodiment. The trigger 401 can be detachably mounted on the spray gun body 10 by snap fit. The pin 402 with the trigger 401 attached can be pushed into the opening H of the spray gun body 10 from one side of the spray gun body 2, and the snap ring 404 leaves the spray gun body 10 on the other side, which is snapped on the wall of the spray gun body 10 adjacent to the opening H. The pin cover 406 may be attached to the end of the pin 402 that slightly protrudes from the opening H. To remove the trigger 401 from the spray gun body 10 , the user only needs to press the end of the pin 402 that slightly protrudes from the opening H.

The spray gun 100 may also include an air micrometer assembly 50 for adjusting the air pressure in the spray gun 100. The air micrometer assembly 50 may include an air control knob 501, a control sleeve 502, and sealing rings 503a and 503b. A swivel joint assembly 60 may be provided at a lower end 504 of the control sleeve 502. The lower end 504 of the control sleeve 502 may form a part of the swivel joint assembly 60. The swivel joint assembly 60 also includes a rotating member 601, a set of balls 602 as part of a ball bearing, and a closing plug 603.

The spray gun 100 may further include an air discharge assembly 70 controlled by the trigger 401 , and by means of which the air flow from the lower portion of the spray gun body 10 (ie, the handle portion 1 ) to the air outlet at the spray gun head 9 may be controlled.

The spray gun 100 may also include a paint needle assembly 80. The paint needle assembly 80 may include a paint needle 801, an actuator 802, a spring 803, and a material flow control knob 804. The paint needle 801 is controlled by the trigger 401, and the outlet hole of the paint nozzle 302 can be opened and closed by means of the paint needle 801 to allow or prevent the flow of material to be ejected from the paint nozzle 302. The actuator 802 is fixed to the paint needle 801, and the spring 803 surrounds the rear portion of the paint needle 801. The front end of the spring 803 abuts on the actuator 802, and the rear end abuts on the inner surface of the material flow control knob 804. The material flow control knob 804 defines a rear stop for the paint needle 801, and defines how far the paint needle 801 can move out of the outlet hole of the paint nozzle 302 when the trigger 401 is pulled.

The spray gun body 10 is provided with an opening at its rear side along the length direction Y, and the bushing 701 is installed in the opening. The first end 701a of the bushing 701 can be non-detachably mounted to the spray gun body 10, for example, by tightening, bonding and/or by pressing. A sealing element, such as a sealing ring, can be provided between the spray gun body 10 and the bushing 701. The material flow control knob 804 can include an outer portion 804a and an inner portion 804b, and the outer portion 804a and the inner portion 804b can be non-movable and non-detachable from each other. The inner portion 804b can include an outer thread, which corresponds to and cooperates with the inner thread of the second end 701b of the bushing 701. When the material flow control knob 804 is rotated, it moves in the axial direction to define the rear stop of the paint needle 801. The distance that the paint needle of the closed paint nozzle 302 outlet can be moved out of the paint nozzle outlet is thereby defined. This defines how much paint can leave the paint nozzle. An intermediate ring 701c may be provided between the external threads of the inner portion 804b of the material flow control knob 804 and the internal threads of the bushing 701. This intermediate ring 701c makes it more difficult to turn the material flow control knob 804. This prevents the user from accidentally turning the material flow control knob 804. The outer surface of the second end 701b of the bushing 701 may have marking lines and/or scales that show the position of the material flow control knob 804 relative to the second end 701b of the bushing 701.

An air chamber 101 is provided in the spray gun body 10 and in front of the bushing 701. A valve sleeve 709 is inserted into the air chamber 101. The valve sleeve 709 has two axial openings at both ends thereof and a plurality of elongated openings in its outer circumference, and the elongated openings in its outer circumference are spaced apart from each other by ribs, advantageously 4-6 ribs. A first sealing element 708a may be provided between the valve sleeve 709 and the inner surface of the spray gun body 10 and in the region of the first end of the valve sleeve 709. A second sealing element 708b may be provided between the valve sleeve 709 and the inner surface of the spray gun body 10 and in the region of the second end of the valve sleeve 709.

The paint needle 801 extends through the air chamber 101, and the air piston 705 surrounds the paint needle 801 but is not fixed to the paint needle 801 so that the air piston 705 can slide on the paint needle 801. The third sealing element 708c is located in front of the collar 705a of the air piston 705 and around the circumference of the air piston 705. The spring 707 is located between the rear side of the collar 705a of the air piston 705 and the bushing 701.

When the trigger 401 is not pulled, the third sealing element 708c abuts against the rear end of the valve sleeve 709 and seals the air chamber 101 relative to the interior of the valve sleeve 709. When air flows into the spray gun and enters the air chamber 101 through the air inlet channel 110, the air cannot flow into the interior of the valve sleeve 709. When the trigger 401 is not activated, a gap 706 is provided between the rear end of the air piston 705 and the front end of the actuator 802. The actuator 802 is fixed to the paint needle 801 in such a way that the two parts cannot move axially relative to each other and advantageously cannot rotate relative to each other. The spring 803 is provided between the actuator 802 and the inner part 804b of the material flow control knob 804.

When the trigger 401 is pulled, the engaging part 401b of the trigger 401 is pressed against the front end of the air piston 705, whereby the air piston 705 slides backward over the paint needle 801, and the third sealing element 708c moves out of its seat at the rear side of the valve sleeve 709. Now, air can flow from the air chamber 101 into the interior of the valve sleeve 709. The front opening of the valve sleeve 709 is sealed, so that air can only flow out from the elongated opening in the outer peripheral surface of the valve sleeve 709. From there, the air flows into the spray width control chamber 202, where the air is distributed between the atomizing air channel and the angle air channel. The atomizing air and the angle air flow out from the opening in the air cap 303.

When the trigger 401 is further pulled, the rear end of the air piston 705 pushes against the actuator 802, the actuator 802 moves backward, and since the actuator 802 is fixed to the paint needle 801, the paint needle 801 also moves backward and opens the outlet of the paint nozzle 302, whereby the paint can flow out from the outlet of the paint nozzle 302 and can be atomized by the atomizing air.

When the trigger 401 is released, the spring 803 presses the actuator 802 and the paint needle 801 forward, so that the paint needle 801 closes the outlet of the paint nozzle 302 and no more paint flows out. The spring 707 presses the air piston 705 forward, so that the third sealing element 708c moves back to its seat at the rear side of the valve sleeve 709. Now, no air can flow from the air chamber 101 to the inside of the valve sleeve 709. Therefore, when the trigger 401 is released, first, the outlet of the paint nozzle 302 is closed, but air still flows out from the opening of the air cap 303 for a short time before the opening of the air cap 303 is closed. In this way, it is prevented that the paint drips from the paint nozzle without being atomized.

The spray gun 100 may also comprise a pressure measuring device 90, in particular a digital pressure measuring device.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (20)

1. A spray gun, the spray gun (100) comprising a spray gun body (10) and a trigger (401) connected to the spray gun body (10), the spray gun body (10) comprising a handle portion (1) for being gripped by a user and comprising a first side and a second side opposite to each other, characterized in that the spray gun body (10) comprises:

a first side flat surface (11) and a second side flat surface (12) on the handle portion (1), the first side flat surface (11) being located on the first side of the lance body (10), the first side flat surface (11) including a front edge and a rear edge in a length direction (Y) of the lance (100), the second side flat surface (12) being located on the second side of the lance body (10) and opposite to the first side flat surface (11), and the second side flat surface (12) including a front edge and a rear edge in the length direction (Y) of the lance (100); and

-A front connection surface (13) and a rear connection surface (14), the front connection surface (13) being connected between a front edge of the first side flat surface (11) and a front edge of the second side flat surface (12), -the rear connection surface (14) being connected between a rear edge of the first side flat surface (11) and a rear edge of the second side flat surface (12), -the front connection surface (13) being located behind the trigger (401) in a length direction (Y) of the spray gun (100), and-the front connection surface (13) comprising a first front flat connection surface (131) and a second front flat connection surface (132) connected to each other and inclined with respect to each other, the first front flat connection surface (131) being connected between the first side flat surface (11) and the second front flat connection surface (132), and the second front flat connection surface (132) being connected between the second side flat surface (12) and the first front flat connection surface (131).

2. The lance as claimed in claim 1, wherein the first side planar surface (11) and the second side planar surface (12) are mirror-symmetrical with respect to a median longitudinal section of the lance (100), and/or

The first front flat connection surface (131) and the second front flat connection surface (132) are mirror symmetrical with respect to a median longitudinal section of the lance (100).

3. Spray gun according to claim 1, characterized in that the angle (α1) between the first side planar surface (11) and the first front planar connection surface (131) is in the range of 110 ° to 150 °, and/or

An included angle (α2) between the second side planar surface (12) and the second front planar connection surface (132) is in the range of 110 ° to 150 °.

4. A lance as claimed in claim 3, wherein the angle (α1) between the first side planar surface (11) and the first front planar connecting surface (131) is in the range 125 ° to 130 °, and/or

An angle (α2) between the second side planar surface (12) and the second front planar connection surface (132) is in the range of 125 ° to 130 °.

5. The spray gun according to claim 1, characterized in that the front connection surface (13) further comprises a third front flat connection surface (133) connected between the first front flat connection surface (131) and the second front flat connection surface (132), the third front flat connection surface (133) being parallel to the width direction (X) of the spray gun (100).

6. The lance according to claim 5, characterized in that the lance (100) further comprises a platform part (3) extending forward from the handle part (1) in the length direction (Y) of the lance (100), the platform part (3) having a top surface (31) and a bottom surface (32) opposite each other, the top surface (31) of the platform part (3) being lower than the trigger (401) in the height direction (Z) of the lance (100),

The first front flat connection surface (131), the second front flat connection surface (132) and the third front flat connection surface (133) continue from a region of the handle portion (1) located behind the trigger (401) to a top surface (31) of the platform portion (3).

7. The spray gun according to claim 6, characterized in that the first front flat connecting surface (131), the second front flat connecting surface (132) and the third front flat connecting surface (133) continue from the top surface (31) of the platform part (3) to the bottom surface (32) of the platform part (3) and further to the bottom of the handle part (1).

8. The spray gun according to claim 1, characterized in that the handle portion (1) further comprises a first front transitional coupling surface (15) and a second front transitional coupling surface (16), the first front transitional coupling surface (15) being connected between the first side planar surface (11) and the first front planar coupling surface (131), and the second front transitional coupling surface (16) being connected between the second side planar surface (12) and the second front planar coupling surface (132),

Either one of the first front transition surface (15) and the second front transition surface (16) is flat or curved.

9. The spray gun according to claim 1, characterized in that the rear connection surface (14) comprises a first rear flat connection surface (141) and a second rear flat connection surface (142) connected to each other and inclined with respect to each other, the first rear flat connection surface (141) being connected between the first side flat surface (11) and the second rear flat connection surface (142), and the second rear flat connection surface (142) being connected between the second side flat surface (12) and the first rear flat connection surface (141).

10. The lance set forth in claim 9, wherein the first rear planar connection surface (141) and the second rear planar connection surface (142) are mirror symmetrical with respect to a median longitudinal section of the lance (100).

11. The lance as claimed in claim 9, wherein the angle (β1) between the first side planar surface (11) and the first rear planar connecting surface (141) is in the range 110 ° to 150 °, and/or

An included angle (β2) between the second side planar surface (12) and the second rear planar connection surface (142) is in a range of 110 ° to 150 °.

12. The lance as claimed in claim 11, wherein the angle (β1) between the first side planar surface (11) and the first rear planar connection surface (141) is in the range 130 ° to 135 °, and/or

An included angle (β2) between the second side planar surface (12) and the second rear planar connection surface (142) is in the range 130 ° to 135 °.

13. The spray gun according to claim 9, characterized in that the rear connection surface (14) further comprises a third rear flat connection surface (143) connected between the first rear flat connection surface (141) and the second rear flat connection surface (142), the third rear flat connection surface (143) being parallel to the width direction (X) of the spray gun (100).

14. The spray gun according to claim 13, characterized in that the handle portion (1) further comprises a first rear transitional coupling surface (17) and a second rear transitional coupling surface (18), the first rear transitional coupling surface (17) being connected between the first rear flat coupling surface (141) and the third rear flat coupling surface (143), and the second rear transitional coupling surface (18) being connected between the second rear flat coupling surface (142) and the third rear flat coupling surface (143),

Either one of the first and second rear transition surfaces (17, 18) is flat or curved.

15. The spray gun according to any one of claims 1 to 14, characterized in that the spray gun body (10) further comprises two first step parts (2), the two first step parts (2) being provided on the first and second sides of the spray gun body (10) respectively and being mirror symmetrical with respect to a median longitudinal section of the spray gun (100), the two first step parts (2) being located on top of the handle part (1),

The spray gun body (10) further comprises a third side flat surface (11 ') and a fourth side flat surface (12'), the third side flat surface (11 ') being located at the first side of the spray gun body (10) and the fourth side flat surface (12') being located at the second side of the spray gun body (10),

The first side flat surface (11) is connected to the third side flat surface (11 ') by one of the two first step portions (2), and the second side flat surface (12) is connected to the fourth side flat surface (12') by the other of the two first step portions (2).

16. Spray gun according to claim 15, characterized in that the extension length of the first side planar surface (11) and/or the second side planar surface (12) in the extension direction of the handle portion (1) is more than 50% of the total length between the top of the handle portion (1) and the bottom of the handle portion (1).

17. The spray gun according to claim 15, characterized in that the spray gun body (10) further comprises two second steps (2 '), which second steps (2') are provided on the first and second sides of the spray gun body (10) respectively and are mirror-symmetrical with respect to a median longitudinal section of the spray gun (100),

The spray gun body (10) further comprises a fifth side flat surface (11 ') and a sixth side flat surface (12'), the fifth side flat surface (11 ') being located on the first side of the spray gun body (10) and the sixth side flat surface (12') being located on the second side of the spray gun body (10),

The third side flat surface (11 ') is connected to the fifth side flat surface (11') by one of the two second step portions (2 '), and the fourth side flat surface (12') is connected to the sixth side flat surface (12 ') by the other of the two second step portions (2').

18. The spray gun according to claim 6 or 7, characterized in that the spray gun body (10) further comprises two recesses (4) on the handle portion (1) and recessed inwardly from respective side surfaces of the handle portion (1), one of the two recesses (4) being located at a first side of the spray gun body (10), the other of the two recesses (4) being located at a second side of the spray gun body (10),

Each of the two recesses (4) includes a recess bottom surface (41) and a plurality of recess side surfaces (42) connected between the recess bottom surface (41) and the respective side surfaces, and is lower than the platform portion (3) in a height direction (Z) of the spray gun (100).

19. The spray gun of claim 18, wherein the recess bottom surface (41) is flat.

20. The spray gun of claim 18, wherein the recess bottom surface (41) comprises a first recess bottom surface (411) and a second recess bottom surface (412) connected to each other and inclined relative to each other, each of the first recess bottom surface (411) and the second recess bottom surface (412) being planar.