TWI641426B - Spray gun and its air valve - Google Patents

Abstract

A spray gun comprising: a spray gun body and an adjustment valve. The lance body defines an intake air flow passage, a first air flow passage, a second air flow passage, and a mounting hole. The mounting hole communicates with the intake air flow passage, the first air flow passage, and the second air flow. Road. The adjusting valve is mounted on the gun body and located in the mounting hole. The adjusting valve includes a first operating member and a second operating member. The first operating member is movably displaced relative to the gun body to adjust the intake air flow. The second operating member is movably mounted on the first operating member and corresponding to the second airflow passage for adjusting the flow rate of the second air outlet passage.

Description

Spray gun and its regulating valve

The invention relates to a spray gun and a regulating valve thereof, in particular to a regulating valve having a plurality of operating members.

The function of the paint spray gun is mainly to apply the compressed gas to spray the paint onto the object to be coated. In order to allow the paint spray gun to cater to diverse needs (such as metal, woodwork, plastic products waiting for paint, different properties of paint, finishing coating, preliminary painting, etc.), most paint spray guns will be equipped with a variety of Adjust the components so that the user can adjust them according to their needs. For example, the intake air flow rate of the compressed gas, the area or shape of the paint spray can be adjusted.

The detailed structure includes, for example, "Spray gun and accessories" of US 2013/0320110 A1, "Air operated paint spray gun" of EP0706832B1, "Paint spray gun" of US 20120097762 A1, and the like. The body of the spray gun body of these prior cases is close to the grip portion, and a knob type adjustment component is arranged, so that the user can use the thumb to adjust the grip when holding. In addition, the body of the spray gun body of these prior cases is also provided with an adjustment assembly at the rear side for the user to operate other adjustment functions.

However, the adjustment functions of these adjustment components are relatively simple and limited, and often require the auxiliary operation of the other hand to be adjusted to meet the requirements, and the operation is inconvenient.

Therefore, in order to improve the convenience of the operation of the spray gun, the inventors have proposed a spray gun comprising: a spray gun body and an adjustment valve. The lance body defines an intake air flow passage, a first air flow passage, a second air flow passage, and a mounting hole. The mounting hole communicates with the intake air flow passage, the first air flow passage, and the The second airflow path. The adjusting valve is mounted on the gun body and located in the mounting hole. The adjusting valve includes a first operating member and a second operating member. The first operating member is movably displaced relative to the gun body to adjust the intake air flow. The second operating member is movably mounted on the first operating member and corresponding to the second airflow passage for adjusting the flow rate of the second air outlet passage.

Further, the adjustment valve further includes a valve seat, the valve seat defines a pivot slot, and the first operating member includes a cylinder, and the cylinder is pivotally disposed at a pivot slot of the valve seat.

Further, the valve seat has a first through hole and a second through hole, and the first through hole and the second through hole respectively communicate with the intake flow path and the first air flow path. The first operating member has a first through hole on the cylinder to shift the first through hole or to communicate with the first through hole or the second through hole by pivoting the cylindrical body.

Further, the cylinder defines a through hole, and the second operating member is movably disposed on the through hole for displacing from a closed position of the second outlet air passage to an open position of the second outlet air passage.

Further, the valve seat has a screwing hole, the screwing hole communicates with the pivoting groove, and the second operating member is screwed to the screwing hole.

Further, the first operating member includes an operating portion, and the second operating member includes an operating end that is on the same side as the operating end and adjacent to each other.

Further, the operating end is a smooth surface adjacent to the operating portion, and the operating portion is slidably sleeved on the smooth surface.

Further, the mounting hole forms a valve hole adjacent to the second air flow passage, and the second operating member includes an abutting end opposite to the operating end, the abutting end is for closing or opening the valve hole, The abutting end has a lead angle which is between 77 and 79 degrees.

Further, the spray gun body includes a grip portion, a spray head and a body portion, the intake air flow passage is located at the grip portion, and the intake air flow passage extends along a length direction of the grip portion, and the body portion connects the grip portion And the nozzle, the first air outlet channel and the second air outlet channel are respectively located on opposite sides of the body, the mounting hole is located at the body adjacent to the holding portion, and the nozzle comprises a first The nozzle portion and a second nozzle portion communicate with the first nozzle portion, and the second outlet air passage communicates with the second nozzle portion.

The invention also relates to an adjustment valve comprising: a valve seat, a first operating member and a second operating member. The valve seat defines a pivoting groove, and the valve seat has a first through hole, a second through hole and a screwing hole communicating with the pivoting groove. The first operating member is pivotally disposed on the pivoting groove of the valve seat, and the first operating member includes a cylindrical body extending along an axial direction, the cylindrical body having a first flow hole located in a radial direction to The first operating member is rotated to offset or communicate the first through hole and the first through hole or/and the second through hole, and the cylindrical body defines a through hole extending along the axial direction. The second operating member is screwed to the screwing hole and is inserted through the through hole to be displaced along the axial direction when rotated.

According to the above technical features, the following effects can be achieved:

1. The single adjustment valve can have multiple adjustment functions, which is convenient for the user to switch and adjust and improve the convenience of operation.

2. The first operating member comprises a pivotable cylinder, which is simple in structure and easy to assemble and manufacture.

3. The second operating member is placed on the first operating member to make the overall structure compact and easy to switch between different operating modes.

4. The second operating member is screwed or retracted by screws, and the operation is stable and reliable.

5. The operating portion of the first operating member and the operating end of the second operating member are located on the same side and adjacent to each other, so that the user can perform fine adjustment operation using only the thumb of one hand, thereby further improving the convenience of the switching operation. .

6. The operating portion of the first operating member is slidably fitted over the smooth surface of the operating end of the second operating member to reduce the operational resistance of the first operating member.

7. The abutting end of the second operating member may have a lead angle, and the angle of the lead angle is between 77° and 79° to improve the fluidity of the compressed gas, thereby improving the spraying effect.

8. The adjustment valve can be applied not only to the paint spray gun, but also to other types of spray guns or other fluid control devices.

(1) ‧‧‧gun body

(11) ‧‧‧ grips

(111)‧‧‧Intake runner

(12)‧‧‧Spray

(121)‧‧‧First nozzle section

(122)‧‧‧second nozzle section

(13) ‧‧‧ Body

(131)‧‧‧First airflow path

(132)‧‧‧Second airflow path

(133)‧‧‧Installation holes

(134)‧‧‧ valve hole

(14) ‧‧‧ Paint Supply Department

(15)‧‧‧ Trigger

(2) ‧‧‧Adjustment valve

(21)‧‧‧First operating piece

(210)‧‧‧Operation Department

(2110) (2210) ‧‧‧Slip

(211)‧‧‧Cylinder

(2111) ‧‧‧ first flow hole

(2112)‧‧‧Second flow hole

(2113) ‧‧‧Perforation

(212) ‧‧‧Operator

(213)‧‧‧Connectors

(22)‧‧‧Second operating parts

(220) ‧‧‧Operator

(2201)‧‧‧Smooth face

(221)‧‧‧ Abutment

(222) ‧ ‧ lead angle

(23)‧‧‧ Seat

(230) ‧‧‧ Limit slots

(231) ‧‧‧ pivot slot

(232)‧‧‧First through hole

(233)‧‧‧Second through hole

(234)‧‧‧Spiral holes

(24)‧‧‧First seal

(25)‧‧‧Second seal

(26) ‧ ‧ third seal

(L)‧‧‧Axial

[First figure] is a schematic perspective view of an embodiment of the present invention.

[Second figure] is a perspective exploded view of an embodiment of the present invention.

[Third Figure] is a top plan view of a first embodiment of the present invention.

[Fourth Diagram] is a perspective exploded view of an adjustment valve according to an embodiment of the present invention.

[Fifth Figure] is a plan sectional view and an operation diagram 1 of an adjustment valve according to an embodiment of the present invention.

[Sixth Drawing] is a plan sectional view and an operation schematic diagram 2 of an adjustment valve according to an embodiment of the present invention.

[Seventh figure] is a plan sectional view and an operation schematic diagram 3 of an adjustment valve according to an embodiment of the present invention.

[Eighth image] is a cross-sectional schematic view of the adjusting valve corresponding to the intake air flow passage and the first air flow passage in the embodiment of the present invention.

[Ninth aspect] FIG. 2 is a cross-sectional view showing a second embodiment of the adjusting valve corresponding to the intake air flow passage and the first air flow passage.

[Tenth Graph] is a schematic plan view of a second embodiment of the present invention.

In combination with the above technical features, the main effects of the spray gun of the present invention and its regulating valve will be clearly shown in the following embodiments.

Please refer to the first figure, which discloses a spray gun according to an embodiment of the present invention, comprising a spray gun body (1) and a regulating valve (2) mounted on the spray gun body (1). The spray gun body (1) comprises a grip portion (11), a spray head (12), and a body portion (13) connecting the grip portion (11) and the spray head (12). The adjusting valve (2) is located adjacent to the grip portion (11) of the body portion (13), so that the user can operate with the thumb when holding.

Referring to the first figure, in the embodiment, the spray gun body (1) is mainly applied to painting, so it may further comprise a paint supply part (14), for example, for connecting paint cans. . Therefore, when the trigger (15) of one of the spray gun bodies (1) is pressed and displaced to a predetermined position, the spray head (12) can be sprayed with the paint accompanying the compressed gas, the main mechanism is that the trigger (15) is linked to the valve member ( For example, the valve needle is moved and opened, but this is the common knowledge of those in the field and is not the focus of this case. For the sake of brevity, it will not be described in detail here. It should be added that, in addition to the general paint spraying operation, the spray gun body (1) can also slightly press the trigger (15), and only the compressed gas is sprayed to remove dust and the like on the surface of the object. .

Continuing to refer to the second figure, in detail, the grip portion (11) has an intake flow passage (111) extending along the length of the grip portion (11) for introducing an external fluid (for example, high pressure gas). . The spray head (12) can be used to provide different paint patterns. For example, the spray head (12) can include a first nozzle portion (121) and a plurality of second nozzle portions (122), the first nozzle portion (121) In the embodiment, the system is located at the center and has a circular hole shape for supplying a circular area of paint. The second nozzle portion (122) is located at the periphery of the first nozzle portion (121) for lateral painting. Combining the above-mentioned circular area of the paint to form a long strip of paint, but the above-mentioned spray pattern and positional relationship are merely illustrative and not limited thereto, and the inside of the nozzle (12) is internally connected to the first nozzle. The shunting structure of the (121) and the second nozzle portion (122) is only a general knowledge of those skilled in the art, and therefore, for brevity, it will not be described in detail.

Referring to the second figure, together with the third figure, the body (13) is connected to the grip portion (11) and the spray head (12), and the body portion (13) has a first air flow passage (131), a first a second air outlet channel (132), a mounting hole (133), the first air outlet channel (131) and the second air outlet channel (132) are respectively located on opposite sides of the body (13), the installation The hole (133) is located at the body portion (13) adjacent to the grip portion (11), the mounting hole (133) is connected to the first air outlet channel (131), the second air outlet channel (132), and the The first air outlet duct (131) is configured to communicate with the first nozzle portion (121), and the second air outlet passage (132) is configured to communicate with the second nozzle portion (122).

Referring to the first figure and the third figure, the adjustment valve (2) comprises a first operating member (21) and a second operating member (22), the first operating member (21) comprising an operating portion (210) The second operating member (22) includes an operating end (220), and the operating portion (210) and the operating end (220) are adjacent to each other and are located on the same side, so that the user can slightly move the thumb position for fine adjustment. . In this embodiment, the operating portion (210) is a ring body and surrounds the operating end (220), and the operating portion (210) and the operating end (220) are both provided with a plurality of anti-slip patterns (2110) ( 2210). Preferably, the operating end (220) is a smooth surface (2201) adjacent to the operating portion (210), and the operating portion (210) is slidably sleeved on the smooth surface (2201), thereby reducing the operation. The frictional resistance of the displacement of the part (210).

Please refer to the second figure and the third figure. In detail, in the embodiment, the adjusting valve (2) further comprises a valve seat (23), which can be mounted on the valve seat (23), for example. The hole (133) is mounted, and the first operating member (21) and the second operating member (22) are mounted to the lance body (1) by the valve seat (23). Specifically, the first operating member (21) includes a cylinder (211) and an actuating member (212), and the actuating member (212) and the tubular body (211) are connected to each other by a connecting member ( 213) It can be connected as a unit by being fixedly connected. The connecting member (213) passes through the valve seat (23), and the connecting member (213) is fixedly connected to the driving member (212) and the cylindrical body by screwing, engaging, bonding, or the like. 211). The actuating member (212) includes the operating portion (210) for the user to interlock the barrel (211) by pulling the actuating member (212). The valve seat (23) defines a pivot slot (231) for pivoting the cylinder (211). Preferably, the valve seat (23) has a limiting slot (230), the limiting slot (230), the connecting member (213) can be located in the limiting slot (230), by the limit The bit groove (230) limits the displacement stroke of the connector (213).

Continuing to refer to the second figure, together with the fourth figure, in detail, the cylinder (211) extends along an axial direction, and the cylinder body (211) has a first flow hole (2111) and a second flow hole in the radial direction. (2112), and defining a perforation (2113) along the axial direction, the valve seat (23) having a first through hole (232) and a second through hole communicating with the pivoting groove (231) (233). In the embodiment, the first through hole (232) and the first through hole (2111) both have a first aperture; the second through hole (233) and the second flow hole (2112) have A second aperture, the first aperture being larger than the second aperture to provide a sufficient adjustment stroke at a limited size of the barrel (211). Continuing to refer to the fifth to seventh figures, when the cylinder (211) is pivoted, the first flow hole (2111) and the second flow hole (2112) are staggered, partially connected or all during the rotation. The first through hole (232) and the second through hole (233) are connected.

Continued Referring to the second figure in conjunction with the third figure, the second operating member (22) is movably inserted through the perforations (2113) of the barrel (211). Specifically, the valve seat (23) has a screwing hole (234) communicating with the pivoting groove (231), and the second operating member (22) is screwed to the screwing hole (234). It should be added that, in order to provide a sufficient sealing effect, the adjusting valve (2) can cooperate with the sealing member. For example, the adjusting valve (2) can further include a first sealing ring (24) and a second sealing ring. (25) and a third sealing ring (26), the first sealing ring (24) is sleeved on the outer circumference of the valve seat (23), and the second sealing ring (25) is located at the valve seat (23) and the Between the first operating members (21), the third sealing ring (26) is located between the valve seat (23) and the second operating member (22).

Continuing to refer to the eighth and ninth drawings, when the valve seat (23) is mounted on the mounting hole (133), the first through hole (232) and the second through hole (233) of the valve seat (23) The intake flow passage (111) and the first outlet air passage (131) are respectively connected. Thereby, when the cylinder (211) is rotated, the intake passage (111) can be respectively adjusted by the first flow hole (2111) and the second flow hole (2112) of the cylinder (211). And the flow rate of the first outlet air passage (131). For detailed operation, please refer to the fifth to seventh figures and their corresponding paragraphs, and the description will not be repeated here. It should be noted that, in this embodiment, since the aperture of the first flow hole (2111) is large, the intake flow path (111) and the first air flow path (131) may be controlled together. Traffic, but not limited to this. For example, the aperture of the second flow hole (2112) may be adjusted to keep the second flow hole (2112) and the second through hole (233) constantly flowing, and only the first flow hole (2111) may be used. Make adjustments.

Continuing to refer to the tenth figure and the third figure, the mounting hole (133) forms a valve hole (134) adjacent to the second air flow path (132), and the second operating member (22) includes the opposite operation. One end of the end (220) abuts the end (221), and the abutting end (221) is used to close or open the valve hole (134). When the second operating member is rotated (22), the second operating member (22) is displaced in the axial direction (L) by the screwing hole (234) of the valve seat (23), so that the second operating member (22) is self-contained. The closed position of one of the valve holes (134) is closed to open one of the open positions of the valve hole (134), and the flow rate of the second outlet air passage (132) can be controlled by the amount of displacement. Preferably, the abutting end (221) has a lead angle (222), and the angle of the lead angle (222) is between 77° and 79°. Preferably, the angle of inclination (222) is 78°.

In view of the foregoing description of the embodiments, the operation and the use of the present invention and the effects of the present invention are fully understood, but the above described embodiments are merely preferred embodiments of the present invention, and the invention may not be limited thereto. Included within the scope of the present invention are the scope of the present invention.

Claims (11)

A spray gun includes: a spray gun body defining an intake flow passage, a first outlet flow passage, a second outlet passage, and a mounting hole, the mounting hole communicating with the intake passage and the first outlet passage And the second airflow passage; and a regulating valve mounted on the gun body and located in the mounting hole, the adjusting valve includes a first operating member and a second operating member, the first operating member is opposite to the spray gun Displacement of the body to adjust the flow of the intake runner or/and the first outlet passage, the second operating member is movably mounted on the first operating member and corresponding to the second outlet passage for adjusting The flow rate of the second outlet air passage. The spray gun of claim 1, wherein the adjustment valve further comprises a valve seat, the valve seat defines a pivot slot, the first operating member comprises a cylinder, and the cylinder is pivotally mounted on the valve seat The pivot slot. The spray gun of claim 2, wherein the valve seat has a first through hole and a second through hole communicating with the pivot slot, wherein the first through hole and the second through hole respectively communicate The first air flow passage and the first air flow passage have a first flow hole on the cylinder of the first operating member to shift the first flow hole or to communicate with the first through hole by pivoting the cylinder Or the aforementioned second through hole. The lance of claim 3, wherein the cylinder defines a perforation, and the second operating member is movably inserted through the perforation for displacing from a closed position of the second outlet passage to Opening one of the opening positions of the second outlet air passage. The lance of claim 4, wherein the valve seat has a screwing hole, the screwing hole communicates with the pivoting groove, and the second operating member is screwed to the screwing hole. The lance of claim 5, wherein the first operating member comprises an operating portion, the second operating member comprising an operating end, the operating portion being located on the same side as the operating end and adjacent to each other. The lance of claim 6, wherein the operating end is a smooth surface adjacent to the operating portion, and the operating portion is slidably sleeved on the smooth surface. The lance of claim 6, wherein the mounting hole forms a valve hole adjacent to the second air flow passage, and the second operating member includes an abutting end opposite to the operating end, the damper The terminal end is for closing or opening the valve hole, and the abutting end has a lead angle, and the angle of the lead angle is between 77° and 79°. The spray gun of claim 1, wherein the spray gun body comprises a grip portion, a spray head and a body, the intake flow passage is located at the grip portion, and the intake flow passage is along the grip Extending in a length direction, the body is connected to the holding portion and the nozzle, and the first air outlet passage and the second air outlet passage are respectively located on opposite sides of the body, and the mounting hole is located adjacent to the body The nozzle includes a first nozzle portion and a second nozzle portion. The first air flow passage communicates with the first nozzle portion, and the second air flow passage communicates with the second nozzle portion. A regulating valve includes: a valve seat defining a pivoting groove, the valve seat having a first through hole, a second through hole and a screwing hole communicating with the pivoting groove; a first operating member pivoting In the pivoting groove of the valve seat, the first operating member includes a cylindrical body extending along an axial direction, the cylindrical body having a first flow hole located in a radial direction to pivot the first operating member Dislocating or connecting the first flow hole to the first through hole or/and the second through hole, the barrel defining a perforation extending along the axial direction; and a second operating member screwed to the snail The hole is bored and placed in the perforation to be displaced along the axial direction upon rotation. The adjustment valve of claim 10, wherein the first operating member comprises an operating portion, the second operating member comprises an operating end, the operating portion and the operating end are on the same side and adjacent to each other .