Abstract: Proposed is a filter module including a filter that filters impurities out in the coolant emitted from a cartridge which includes a housing and a cap. The filter module may include not only a filter accommodation member including a support surface and a perforating member protruding from the support surface but also a first sealing member with a first external diameter including a through-hole fitted into the perforating member. The first sealing member may be transformed into a shape with a second external diameter—the second external diameter is smaller than the first external diameter—corresponding to the width of an inlet of the housing in which the first sealing member accommodates a cap when the cap is perforated by the perforating member.

Abstract: A spray gun for fluid, including a body defining an internal pipe, a shutoff member which is movable between a release position and a shutoff position of the internal pipe, a connecting member rigidly connected to the shutoff member, a coupling member having an engaged configuration in which it is fixed relative to the body, and a trigger pivotably mounted about a primary axis relative to the connecting member and about a secondary axis relative to the coupling member, the primary and secondary axes being parallel. The coupling member has a deployed configuration in which it is mobile in translation relative to the body in a direction orthogonal to the primary and secondary axes.

Abstract: A spray gun adapter establishes fluid communication between a fluid pump of a handheld airless spray gun and an applicator accessory. The adapter comprises an adapter body, a head attached to the adapter body, and a protrusion. The adapter body comprises an upper portion, a lower portion, a radial inlet located in a sidewall of the adapter body between the upper and lower portions, and an adapter bore having a first diameter in fluid communication with the radial inlet. The head comprises a cavity in fluid communication with the adapter bore and having a second diameter larger than the first diameter, an adapter outlet located in the upper portion of the adapter body and in fluid communication with the cavity, and a handle extending radially from the head. The protrusion extends radially from the adapter body between the upper and lower portions of the adapter body.

Abstract: A spray head includes a nozzle, a sealing gasket, a first nut, and a screw. The nozzle includes an inlet portion, an outlet portion extending from an end of the inlet portion along an axial direction, and a first through hole penetrating the inlet portion and the outlet portion along the axial direction. The first through hole defines an opening on a surface of the outlet portion facing away from the inlet portion. The opening is rectangular. The sealing gasket is sleeved on the inlet portion. The first nut is sleeved on the nozzle and receiving the sealing gasket. The screw is located on a side of the sealing gasket facing away from the outlet portion and is engaged with the first nut. A second through hole penetrates the screw communicating with the first through hole. The disclosure also provides a cleaning device having the spray head.

Abstract: A hose end spray head apparatus includes a spread head body and a hose coupling. The spray head body includes a mixing body and a spray outlet arm formed as a unitary construction. The spray outlet arm extends outwardly from the mixing body and includes a spray bore to discharge a mixed fluid. The spray bore communicates with atmosphere via a first radial sidewall bore and a first offset top surface bore. An axial bottom surface bore extends from the bottom surface to the spray bore and is draws product from a container so as to inject the product into the spray bore. A second radial sidewall bore is configured to communicate an open interior of the container with atmosphere. The hose coupling is secured to the mixing body and mounts to a fluid supply to form the mixed fluid which is discharged through the spray bore.

Abstract: Provided is a carwash machine. The carwash machine includes: a steam generator and a spray gun connected to the steam generator. The steam generator has a gas outlet used for discharging gas. The spray gun includes a spray gun outer shell and an operating handle. The operating handle is provided on the spray gun outer shell. The steam generator includes: a boiler body, the boiler body having a combustion chamber, and the combustion chamber being in communication with the gas outlet; an inner cover, the inner cover being sleeved on an outer side of the boiler body, and a gap between the inner cover and the boiler body forming a gas discharge channel used for connecting the combustion chamber and the gas outlet; and an outer cover, the outer cover being sleeved on an outer side of the inner cover. The spray gun also includes: a locking switch.

Abstract: Various embodiments of the present disclosure provide an electronic inflator configured to direct pressurized air into an inflatable object, to monitor the air pressure inside the inflatable object, and to automatically stop directing pressurized air into the inflatable object after determining that the air pressure inside the inflatable object has reached a preset pressure.

Abstract: The utility model discloses a pressure washer which comprises a water-sealed battery part and a main body part, wherein the water-sealed battery part comprises a shell formed by connecting a cover body and a lower cavity, and a battery pack is arranged in the shell. The pressure washer of the utility model is simple and ingenious in structural design, can effectively improve the sealing effect of the shell and prevent water from entering.

Abstract: A liquid spray gun nozzle assembly is disclosed comprising a spray gun connection portion opposite a coating liquid outlet portion adapted to connect the liquid spray gun nozzle assembly to a compatible liquid spray gun body, the spray gun connection portion comprising an outer wall comprising a radially-outward facing surface; first and second camming members disposed on the radially-outward facing surface, each camming member comprising first end, a second end, and a camming surface facing the coating liquid outlet portion; a first access window separating the first end of the first camming member from the second end of the second camming member; and a second access window separating the first end of the second camming member from the second end of the first camming member.

Abstract: Apparatus for spraying a material on a surface comprises at least one elongate member having a distal end and a proximal end, at least one spray nozzle mounted at the distal end of the elongate member for spraying the material in a spray pattern, the spray nozzle being connected to a spray material input at the proximal end of the elongate member, a camera mounted at the distal end of the elongate member and connected to a camera output at the proximal end of the elongate member, the camera being arranged to capture images of the spray pattern, and a control mechanism arranged to control the operation of the spray nozzle from the proximal end of the elongate member.

Abstract: The present invention provides an airless adhesive spray gun that atomizes adhesive sprayed through it without the use of air atomization. This system provides numerous enhancements to the prior art including limiting overspray “fog,” saving on sprayed material because of a more efficient spray pattern, and providing a stronger bond than that of the air-atomized spray guns of the prior art.

Abstract: A spray gun adapter establishes fluid communication between a fluid pump of a handheld airless spray gun and an applicator accessory. The adapter comprises an adapter body, a head attached to the adapter body, and a protrusion. The adapter body comprises an upper portion, a lower portion, a radial inlet located in a sidewall of the adapter body between the upper and lower portions, and an adapter bore having a first diameter in fluid communication with the radial inlet. The head attached to the adapter body is attached at the upper portion of the adapter body. The head comprises a cavity in fluid communication with the adapter bore and having a second diameter larger than the first diameter, an adapter outlet located in the upper portion of the adapter body and in fluid communication with the cavity, and a handle extending radially from the head. The protrusion extends radially from the adapter body between the upper portion and the lower portion of the adapter body.

Abstract: A sprayer includes a spray gun and a hopper. An air source provides compressed air to the sprayer to both eject fluid from the spray gun as a spray and to pressurize the hopper. The spray gun includes an airflow controller for controlling the flow of the compressed air to a nozzle of the spray gun, a pressure regulator for regulating a pressure of the compressed air flowing to the hopper, and a relief valve between the pressure regulator and the hopper. The hopper receives the compressed air through a port in the hopper, and the compressed air assists the flow of material out of the hopper and into the spray gun.

Abstract: The present disclosure provides a flow switch operated by a single button, including a switching device and an outlet device. The switching device includes a diverter member and a switching assembly. The switching assembly includes a fixing member, a sealing member and a linking rod. The diverter member has a passing through chamber. The fixing member has a first movable chamber and a linking rod channel. The sealing member has a second movable chamber. The linking rod has a blocking flange and a sealing portion. The sealing member is used to control an inlet condition of the passing through chamber and the first movable chamber. The sealing portion is used to control an inlet condition of the linking rod channel. The blocking flange and the second movable chamber are correspondingly moved to make the sealing member and the sealing portion to be operated continuously with each other.

Abstract: The invention relates to a method for actuating an electrically commutated fluid working machine (1), wherein the actuation of the electrically controllable valves (11) of the electrically commutated fluid working machine (1) is effected dependent on the fluid requirement and/or mechanical power requirements. In addition, on actuation of the electrically controlled valves (11) the electrical power required for actuating the electrically controllable valves is taken into account.

Abstract: A slide flow distributor to direct and modulate a gaseous fluid, in inlet and outlet. This regulation is carried out by means of a spool, which conveys compressed air in a determined charging direction and puts in communication the other chamber with the environment at the same time. This is a servo-actuator which can be used in the field of pneumatic systems of valve actuation. It has a specific pneumatic servo-actuating system using compressed air. This distributor uses a linear motor using a new pneumatic servo-actuator which generates a force in the same direction of the axial force of the motor, with the result that the spool is accelerated in a predetermined direction. The pneumatic servo-actuator is made of a profiled body, a plurality of balls and corresponding elastic means which press the plurality of balls on the side surface of the profiled body.

Abstract: A fluid applicator configured to reduce user fatigue is presented. The applicator comprises an inlet and an outlet fluidically coupled by a fluid path. The applicator also comprises a trigger. The trigger is configured to, when actuated, move between a closed position and an open position. The open position comprises a fluid flowing from the inlet, to the outlet, along the fluid path. The applicator also comprises a trigger support configured to reduce a pressure required to maintain the trigger in an open position. The trigger support is configured to reduce the pressure required as the trigger actuates between the closed position and the open position.

Abstract: The invention relates to a paint spraying unit which includes a paint pump, a paint storage container, a paint spraying device, a paint line and a drive device, where the drive device drives the paint pump and the paint pump conveys paint out of the paint storage container through the paint line to a nozzle of the paint spraying device. In this connection, the drive device includes a compressed air rotation motor as the motor.

Abstract: A fluid applicator configured to reduce user fatigue is presented. The fluid applicator comprises a trigger configured to, when actuated, move between a closed position and an open position, wherein the open position comprises a fluid flowing from the inlet, to the outlet, along the fluid path. The trigger also comprises a trigger support configured to, when actuated, reduce a pressure required to maintain the trigger in an open position.

Abstract: A trigger locking system for a liquid applicator having a trigger with an opening is provided. The trigger locking system comprises trigger locking device configured to extend through the opening. The trigger locking device is configured to move, when actuated, between a defined locked position and a defined unlocked position. While the system is in a locked position, the trigger is nonactuable. While the system is in an unlocked position, the trigger is actuable such that, when actuated, a liquid is released from the liquid applicator.

Abstract: A water control system including a showerhead and a tub faucet. The faucet has a temperature controlled valve configured in a first mode to automatically restrict fluid flow through the faucet and direct fluid to the showerhead once the fluid flowing through the faucet reaches a predetermined temperature, referred to as a hot mode. The faucet also has a manual override member configured to manually restrict fluid flow through the faucet and to the showerhead to allow cold showers, referred to as a cold mode. The valve includes a piston, and a sleeve configured to establish the hot mode and the cold mode.

Abstract: A nozzle assembly comprises a hollow nozzle body having a central bore and a plurality of ports extending through the body from the central bore; and a switching valve cartridge disposed in the central bore that directs fluid flow to ports upon application of fluid flow above a predetermined threshold to the inlet and direct fluid flow to different ports upon fluid flow having subsequently dropped below the predetermined threshold and then exceeding the predetermined threshold. The cartridge comprises a cylindrical cartridge case having a front portion and a cup shaped rear portion, a cylindrical poppet slidably disposed within the cup shaped rear portion of the cartridge case, and a biasing member within the cartridge case between the front portion of the case and the poppet urging the poppet away from the front portion of the cartridge case.

Abstract: Embodiments of a spray gun incorporating a needle for applying multiple component materials are provided. In accordance with certain embodiments, the spray gun includes a fluid delivery tip assembly comprising an inner passage, a hollow needle disposed within the inner passage of the fluid delivery tip assembly, wherein the hollow needle comprises at least two indentions along an outer circumferential surface of the hollow needle near an end of the hollow needle, a first passage configured to deliver a first spray fluid to a fluid tip exit of the fluid delivery tip assembly, wherein the first passage is defined by a volume between the fluid delivery tip assembly and the hollow needle, and a second passage through the hollow needle, wherein the second passage is configured to deliver a second spray fluid to the fluid tip exit of the fluid delivery tip assembly.

Abstract: A spray coating system is provided with features to improve resistance to wear and corrosion, while also improving ergonomics. The spray coating system may include a spray coating device having a body with a liquid inlet coupled to a liquid chamber, and a protective liner extending inside the liquid chamber, wherein the protective liner is fixedly coupled to the body without threads. The spray coating device also may include a liquid nozzle extending inside the protective liner, and a cap extending over the liquid nozzle.

Abstract: A power arm is designed similar to a rifle stock that can be applied to a fire hose coupling via, for example, a quick detach rail system. The power arm can provide a firefighter with additional control of a fire hose which can be extremely helpful in a hostile environment. The power arm allows a firefighter to use their body as a whole to provide a maximum advantage for controlling a fire hose that is streaming water.

Abstract: A coating dispensing device includes a trigger assembly for actuating the coating dispensing device to dispense coating material and a nozzle through which the coating material is dispensed. The coating dispensing device further includes a source of voltage and a voltage multiplier for multiplying the voltage. The voltage multiplier is coupled to the source. An output terminal of the voltage multiplier is charged to a high-magnitude electrostatic potential and is adapted to charge coating material as the coating material is dispensed from the dispensing device. The coating dispensing device further includes a circuit for providing a visual indication of the voltage at the output terminal. The circuit for providing a visual indication of the voltage at the output terminal comprises a first impedance across which a portion of the voltage at the output terminal appears and an amplifier.

Abstract: An actuator with an anti-drool valve is provided for attaching to or mounting on an aerosol container. Aerosol actuators, and more recently trigger actuated aerosol actuators, may include a manifold which fits to or communicates with a valve on an aerosol container or can. Aerosol containers or cans typically contain a propellant such as a compressed gas or a volatile hydrocarbon. The contents of the container, along with the propellant, are held in the container by a container valve.

Abstract: A water spray gun including a gun body. The gun body includes: an inner part including a water channel; an outer part including a handle; an upper part including a spray bar, a water spray plate, a lock button, and a pull rod including a plug; and a lower part including an water stop plug disposed at an distal end thereof, a water stop plate, a water stop spring, a first sealing ring for stopping water, and a second sealing ring for introducing water. The water channel is disposed in the inner part of the gun body. The handle is movably mounted on the outer part of the gun body via a pin. A water sealing position of the water spray gun is disposed at the distal end for keeping the water out of the gun body and for preventing the gun body from becoming stuck and rupturing.

Abstract: A method for determining a fraction of an adsorbed material contained in a formed body serving as an adsorber material. For the case in which the adsorber material is present in the form of a formed body, at least two electrodes are arranged, spaced apart from one another, on a surface of the formed body and/or are firmly inserted in the formed body; that, for the case, in which the adsorber material is present in the form of a powder or granulate, a corresponding formed body made of the same material is durably inserted in the powder or granular material. The electrodes are supplied with an alternating electrical current, whereby an electrical characteristic variable is ascertained; and, based on the characteristic variable, degree of saturation of the adsorber material is ascertained. Furthermore, a corresponding apparatus is claimed.

Abstract: A garden sprayer has a main body, a shaft, a positioning knob, a control member and a seal sleeve. Since the control member is driven by the rotation of the shaft, the user does not need to keep pressing the sprayer to output water. When the user needs to take a break, he or she can jus hook a gripping loop on any protruding object. With a connecting tube and the connecting hole, the assembly can be finished with any hand tools.

Abstract: A spray gun, including a gun body, a handle attached to the gun body, a fluid passageway, a handle switch, and a buckle. The fluid passageway is disposed in the gun body and the handle. The handle switch is movably disposed on the handle by a rivet for opening and shutting the fluid passageway. The buckle is movably disposed on the handle via a switch shaft. The spray gun employs the buckle as a locking mechanism that has fewer parts, and therefore costs are reduced and convenience, reliability, and durability improved. The spray gun can be operated with one hand only by swinging it once to open and swinging it again to close. As a result, the performance and quality of the spray gun are improved.

Abstract: A spray gun includes a main piston chamber having an actuatable piston and a gun block. The gun block includes a mixing chamber that has a pair of impingement holes that each tangentially intersects with an exit hole of the mixing chamber at opposing tangential points. The gun block also includes a tip that is coupled to an end of the mixing chamber and has a pattern channel that is substantially axially aligned with the exit hole of the mixing chamber. The length of the pattern channel is less than the length of the exit hole of the mixing chamber. In some versions, the ratio of the pattern channel to the combined length of the pattern channel and exit hole can be between 31%, inclusive, and 5%, inclusive. A selectively coupleable handle may be provided such that users can utilize different handles with the spray gun.

Abstract: An ergonomic handle assembly can allow an operator to comfortably support weight of a fluid filled reservoir connected to a fluid applicator sprayer. Any combination of first, second and third shoulders can be formed on the handle assembly to provide increased support surface area in three dimensions with respect to a hand of an operator supporting the fluid applicator spray gun for distributing weight across both the palm and fingers through a proximal support surface of the first support shoulder, the distal support surface of the second support shoulder, and the proximal support surface of the third support shoulder. The increased support surface area can allow an operator to support and handle the fluid applicator spray gun with reduced gripping force when compared to existing fluid applicator spray guns. The reduced gripping force can reduce the likelihood of repetitive stress syndrome injuries to the hand and arm of an operator.

Abstract: A fluid dispensing device comprises a housing body, a reciprocating piston fluid pump, a primary drive element, a wobble assembly and a spray tip. The reciprocating piston fluid pump has a piston disposed within a pumping chamber inside the housing body. The primary drive element is coupled to the housing body to provide a rotary input. The wobble assembly connects the primary drive element to the reciprocating piston fluid pump to convert the rotary input into reciprocating input to the piston. The spray tip connects to an outlet of the pumping chamber.

Abstract: A torch assembly adapted to be attached to an associated fuel supply, the torch assembly has a housing, a fuel line at least partially contained within the housing, a burn tube extending from the housing and adapted to receive fuel from the fuel line, an attachment member operatively connected to the housing for connecting the torch assembly to the associated fuel supply, the attachment member in fluid communication with the fuel line for delivering fuel from the associated fuel supply to the fuel line; a control apparatus having a trigger for actuating an on/off valve adapted to permit or stop flow through the fuel line, a regulator adapted to at least partially restrict flow in the fuel line, and a controller operatively connected to the regulator to adjust the position of the regulator to vary the flow of fuel through the fuel line.

Abstract: A spray gun includes a gun body, a rotary plug and a button. The gun body has a valve seat extending between an inlet passage and an outlet passage thereof. The plug is accommodated in a chamber of the valve seat and has a fluid path, with the plug rotatable between an open position where the fluid path joins the inlet passage and the outlet passage and a closed position where the plug separates the inlet passage from the outlet passage. The button has two lobes joined to opposite ends of the plug. An elastomeric seal ring is sleeved around the plug. A backup ring adjacent to the seal ring is sleeved around the plug. The seal ring and the backup ring are held between a shoulder of the valve seat and the respective lobe of the button.

Abstract: A water spray gun including a gun body. The gun body includes: an inner part including a water channel; an outer part including a handle; an upper part including a spray bar, a water spray plate, a lock button, and a pull rod including a plug; and a lower part including an water stop plug disposed at an distal end thereof, a water stop plate, a water stop spring, a first sealing ring for stopping water, and a second sealing ring for introducing water. The water channel is disposed in the inner part of the gun body. The handle is movably mounted on the outer part of the gun body via a pin. A water sealing position of the water spray gun is disposed at the distal end for keeping the water out of the gun body and for preventing the gun body from becoming stuck and rapturing.

Abstract: A gardening gun structure may include a water gun body with an extended handle; a pull grip pivotally connected to a rear side of the handle; and a water controlling shaft set comprising a water controlling shaft, a water stoppage ring and a water controlling head being disposed at an end of the water controlling shaft, and a screw thread section being disposed at another end, a spring being sleeved around a shaft section disposed at an inner end of the water controlling head, a water stoppage pad with a central hole being sleeved around a shaft section disposed at a rear end of the spring, a first bush being sleeved around a shaft section between the spring and the water stoppage pad, and a second bush being sleeved around a shaft section disposed at a rear end of the water stoppage pad.

Abstract: Plume shield shroud (10) for a plasma gun (30) includes a substantially tubular member (14) comprising an axial length, a plume entry end (11), and a plume exit end (13). The shroud (10) is adapted to be mounted to a plasma gun (30). A method of protecting, confining or shielding of a gas plume of a plasma gun (30) includes mounting (20) a gas plume shroud (10) on the plasma gun (30) such that the shroud (10) is sized and configured to substantially surround at least a portion of the gas plume.

Abstract: A spray gun, which is convertible for use with and without an extension wand, may use the valve mechanism and nozzle attached adjacent to the handle of the gun. When spraying requires the spray to be released away from the gun handle and for spot applications of the spraying liquid, the spraying nozzle is removed and the extension wand or tube is attached to the gun handle. The valve assembly remains in place and another valve assembly and nozzle is provided at the end of the extension furthest away from the handle. A rod is attached to and extends between the valves so that they both move together from closed to open positions responsive to the trigger of the spray gun. When the valves are closed, there is no spraying liquid in the extension. The valving is dripless both with and without the extension.

Abstract: A lightweight spray device with spray body that is suitable for precision cast molding, solving general casting problems, such as shrinkage and bubbling; and a process for manufacturing the same. The spray device is one with magnesium spray body provided with a spray part and a handle part, characterized in that the magnesium spray body is one formed with the use of a mold for magnesium spray body wherein a first slide pin is provided at a region where the spray part and the handle part cross each other and wherein around the first slide pin, there is provided a product melt orifice.

Abstract: A sprinkler includes a handle, a nozzle connected to the handle, a lever connected to the handle and pivotable between an idle position and an active position, and a lever-locking apparatus for locking the lever in the active position. The lever-locking apparatus includes an anchor formed on the handle, a stop formed on the handle, and a catch attached to the lever. The catch is moved on the anchor, stopped by the stop and trapped on the anchor as the lever is pivoted toward the handle and released. The catch is released from the anchor as the lever is again pivoted toward the handle and released.

Abstract: A sprinkler includes a body, a nozzle, a grip, a decorative element and a handle. The body includes a tube in communication with a cylinder. The nozzle is connected to the cylinder. The grip includes a space for receiving the tube and the cylinder and two openings in communication with the cylinder. The decorative element includes two lateral portions each including a ring placed around a corresponding one of the openings. The handle includes two semi-handles for pressing the rings on the grip.

Abstract: A high pressure washer apparatus in combination with a lightweight fastenerless cart. The cart is characterized by a rigid structure which essentially consists of a continuous folded aluminum plate having a horizontal platform wall portion for supporting said washer apparatus; downward extending side wall portions; an upward extending front wall portion and an upward extending rear wall portion. A telescoping handle is mounted on the rear wall portion for pushing, pulling, and lifting the pressure washer apparatus. Accessories, mounted in “built-in” provisions are readily available to an operator of the pressure washer apparatus.

Abstract: A system including a sprayer including a handle, a trigger configured to move between a first trigger position and a second trigger position, wherein the sprayer is configured to block flow of a coating material when the trigger is in the first trigger position and to spray the coating material when the trigger is in the second trigger position, a trigger lock coupled to the trigger, wherein the trigger lock is configured to selectively block movement of the trigger between the first trigger position and the second trigger position.

Abstract: A hand-held, electrostatically- and/or compressed gas-aided coating material dispensing device comprises a barrel and a handle extending downward from the barrel. The handle includes a module selected from modules having a number of different characteristics for coupling sources of coating material, compressed gas and/or electrical supply to the coating material dispensing device.

Abstract: A pneumatic tool as an integral plastic part for blowing, the tool having a connecting nipple with a rigid connecting part for supplying a pressure medium, and a blow head with at least one nozzle opening for targeted release of the pressure medium. A flexibly deformable bending part is attached to the rigid connecting part with the associated connecting nipple. A non-bendable rigid upper part with the blow head is attached to the deformable bending part. Also included is a valve rod for the pneumatic tool, wherein the valve rod is formed as a pulling tool for pulling out and for reinserting an internal seal.

Abstract: A spray coating system, in one embodiment, includes a spray gun having a body, a valve cartridge, and a protective insert. The body includes a passage intersecting a receptacle. The valve cartridge is disposed in the receptacle. The protective insert is disposed in the passage. The protective insert has a central passage, and the protective insert protects the passage from wear by liquid flow through the body.

Abstract: A pneumatic dispenser for dispensing viscous material, for example, mastic caulk, from a container is described. The dispenser comprises a fluid supply arrangement for accepting a dispensing nozzle of the container and providing a flow of pressurized fluid to the dispensing nozzle to enable the material to be dispensed as a spray. A moveable member can be used to control the flow of pressurized fluid, for example a member disposed on a cap for closing a container containing compartment of the dispenser and/or a moveable member disposed around the dispensing nozzle. The arrangement of the fluid supply arrangement allows for convenient control of the pressurized fluid flow for spraying the material. Also disclosed is a dispenser with a readily exchangeable pressure application interface for applying a dispensing pressure to the container, enabling the dispenser to be used with both cartridge and foil pack containers.

Abstract: A spray gun structure for use by a left-handed person is provided. When held in the left hand, the spray gun structure defines a positive direction, which is the direction the palm of the left hand faces, and a negative direction, which is opposite to the positive direction. The spray gun structure includes a nozzle, a handle, and a body connecting the nozzle and the handle. The body is provided with a regulating knob projecting in the positive direction. The spray gun structure is further provided with a paint can connecting portion extending in the negative direction. When the handle of the spray gun structure is held in the left hand, the regulating knob, which is provided on the body and projects in the positive direction, can be rotated directly by the thumb of the left hand to enable single-handed operation and ease of use.