CN113385318A

CN113385318A - Spray gun and spray gun control method

Info

Publication number: CN113385318A
Application number: CN202010172221.2A
Authority: CN
Inventors: 张士松; 孙益民; 钟红风
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2020-03-12
Filing date: 2020-03-12
Publication date: 2021-09-14

Abstract

The invention provides a spray gun and a spray gun control method, wherein the spray gun comprises: the shell is provided with an air outlet and a discharge hole which are mutually independent; the valve rod assembly is movably arranged in the shell and is used for plugging or opening the discharge hole; the fan module is arranged in the shell and comprises a motor and a fan, and the motor is used for driving the fan to rotate; the operating assembly is used for controlling the valve rod assembly and the fan module; the operation component acts, and firstly, the fan module is started; and after the fan module works for a preset time, the valve rod assembly is controlled to open the discharge hole. Through the technical scheme that this application provided, can solve the poor problem of spray gun result of use among the prior art.

Description

Spray gun and spray gun control method

Technical Field

The invention relates to the technical field of spray guns, in particular to a spray gun and a spray gun control method.

Background

During operation of the HVLP paint spray gun, ambient air is drawn into the air pressure chamber by the fan assembly. A part of the air entering the air pressure cavity is sprayed out through the air port of the nozzle; the other part of the paint enters the material spraying kettle to form pressure on the paint in the kettle, so that the paint is pressed to the material opening of the nozzle from the kettle, the paint at the material opening does work through the air at the air opening, and the paint at the material opening is atomized to achieve the paint spraying effect.

Atomization of the coating requires the fan to provide sufficient wind pressure and velocity, which requires the fan to operate for a period of time. Most of the existing paint spray guns adopt low-speed motors, the motors are started quickly, and wind pressure and wind speed which are necessary for coating atomization can be generated in a very short time, so that the existing HVLP paint spray gun can simultaneously drive a fan assembly to work and open a spray nozzle when a user operates a trigger. If a high-speed motor with a long starting time is applied to an HVLP paint spray gun, when a fan assembly and a nozzle are simultaneously opened, coating residues at the nozzle can be sprayed out due to the fact that the pressure in a kettle is higher than the external pressure, but because the air generated by the fan at the moment can not meet the atomization requirement, the coating cannot be atomized and is sprayed out in a beam shape, and the using effect of the whole machine is poor.

Disclosure of Invention

The invention provides a spray gun and a spray gun control method, which aim to solve the problem of poor use effect of the spray gun in the prior art.

According to one aspect of the present invention, there is provided a spray gun comprising: the shell is provided with an air outlet and a discharge hole which are mutually independent; the valve rod assembly is movably arranged in the shell and is used for plugging or opening the discharge hole; the fan module is arranged in the shell and comprises a motor and a fan, and the motor is used for driving the fan to rotate; the operating assembly is used for controlling the valve rod assembly and the fan module; the operation component acts, and firstly, the fan module is started; and after the fan module works for a preset time, the valve rod assembly is controlled to open the discharge hole.

In one embodiment, the operating assembly includes a trigger movably disposed on the housing for actuating the valve stem assembly to block or unblock the discharge orifice.

In one embodiment, a valve stem assembly comprises: the spray rod is movably arranged in the shell, and one end of the spray rod is used for plugging or opening the discharge hole; the driving part is arranged on the spray rod; the trigger is movable to have a separated state of not contacting the driving part and a contact state of contacting the driving part, and the trigger drives the spray bar to move when the trigger contacts the driving part.

In one embodiment, the valve rod assembly further comprises a reset piece, the reset piece is arranged between the spray rod and the shell, and the reset piece provides a force for promoting the spray rod to block the discharge port.

In one embodiment, the operating assembly further comprises a locking member movably disposed on the housing, the locking member having a restricting position and an escape position; when the locking piece is located at the limiting position, the locking piece limits the movement of the trigger; when the locking piece is located the position of dodging, the limiting effect of locking piece to the trigger is relieved, and the fan module is opened to the locking piece simultaneously.

In one embodiment, the operating assembly further comprises a switch linkage movably disposed on the housing, the switch linkage having a first end for abutting the trigger; when the locking member is in the restricting position, the locking member restricts the movement of the trigger by the opening link member.

In one embodiment, the locking piece is provided with a first limiting part, and the switch linkage piece is correspondingly provided with a second limiting part matched with the first limiting part; when the position is limited, the first limiting part is matched with the second limiting part; when avoiding the position, the first limiting part is disengaged from the second limiting part.

In one embodiment, the fan module comprises a power switch, and the switch linkage piece further comprises a second end used for abutting against the power switch; when the locking piece is located the position of dodging, locking piece drive switch linkage piece triggers switch, opens the fan module.

In one embodiment, the locking member is provided with a drive ramp; the switch linkage moving piece is correspondingly provided with a matching surface matched with the driving inclined surface; when the locking piece moves from the limiting position to the avoiding position, the driving inclined surface is abutted against the matching surface, and the driving switch linkage piece triggers the power switch.

In one embodiment, the fan module further comprises a power switch arranged on the switch linkage piece; when the locking piece moves to the avoiding position from the limiting position, the locking piece triggers the power switch to start the fan module.

In one embodiment, the trigger is provided with a standby position, a starting position and a discharging position which are sequentially arranged along the movement direction of the trigger, and when the trigger moves from the standby position to the starting position, the trigger starts the fan module; when the trigger moves from the starting position to the discharging position, the valve rod assembly opens the discharging hole.

According to another aspect of the invention, there is provided a control method for a spray gun, the spray gun comprising a blower module and a valve stem assembly, the valve stem assembly being used to close or open a discharge outlet of the spray gun, the control method comprising, when the spray gun is started: firstly, starting a fan module; after the fan module is opened for the preset time, the valve rod assembly is controlled to open the discharge hole.

In one embodiment, the spray gun control method further comprises, when the spray gun is turned off: firstly, controlling the valve rod assembly to close the discharge hole; and then controlling the fan module to stop working.

By applying the technical scheme of the invention, the spray gun comprises a shell, a valve rod assembly, a fan module and an operation assembly. Through operating module control valve rod subassembly and fan module, the fan module is opened earlier to the accessible operating module during the use, utilizes the fan module to last behind the work a period, and the discharge gate is opened to rethread operating module control valve rod subassembly. Through the structure, the fan module can supply enough wind power and wind pressure before the discharge port is opened, so that the air of the air outlet can meet the requirement of coating atomization when the coating is sprayed out from the discharge port, the spraying quality of the coating is ensured, the phenomenon that the coating is sprayed out in a beam shape due to insufficient wind power is avoided, and the using effect of the spray gun is ensured.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural diagram illustrating a spray gun in a shutdown state according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram illustrating a spray gun according to an embodiment of the present invention when the blower module is in operation;

FIG. 3 illustrates a schematic structural view of a trigger provided in contact with the valve stem assembly according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of a discharge hole provided according to an embodiment of the present invention when the discharge hole is opened;

FIG. 5 shows a close-up view at D1 in FIG. 1;

FIG. 6 shows a close-up view at D2 in FIG. 2;

FIG. 7 shows an enlarged view of a portion of FIG. 3 at D3;

FIG. 8 shows a close-up view at D4 in FIG. 4;

FIG. 9 is an exploded view of the opening linkage member and the locking member according to the second embodiment of the present invention;

FIG. 10 is an exploded view of the opening linkage member and the locking member according to the second embodiment of the present invention;

FIG. 11 illustrates an assembly view of the switch linkage and locking member provided in accordance with a second embodiment of the present invention;

FIG. 12 shows a schematic structural view of the locking member in the first limit position;

FIG. 13 is a schematic structural view showing the locking member in the first, retracted position;

FIG. 14 is a schematic view of the structure of the opening linkage and the locking member with the trigger in the discharge position;

FIG. 15 is an exploded view of the opening linkage member and the locking member provided in the third embodiment of the present invention;

fig. 16 is an exploded view of the opening linkage member and the locking member according to the third embodiment of the present invention;

FIG. 17 illustrates an assembly view of the switch linkage and locking member provided in accordance with a third embodiment of the present invention;

FIG. 18 shows a schematic structural view of the locking member in the restricting position;

FIG. 19 is a schematic view of the lock in the retracted position;

FIG. 20 is a schematic view of the structure of the opening linkage and the locking member with the trigger in the discharge position;

FIG. 21 shows a stroke diagram for operation of the spray gun provided by an embodiment of the present invention.

Wherein the figures include the following reference numerals:

10. a housing; 11. an air outlet; 12. a discharge port;

20. a valve stem assembly; 21. a spray rod; 22. a drive section; 23. a reset member;

30. a fan module; 31. a power switch; 311. a mating portion; 312. a contact;

41. a trigger; 411. a pressing part;

42. an opening linkage member; 421. a second limiting part; 422. a mating surface;

43. a locking member; 431. a first body; 432. a first limiting part; 433. a first avoidance portion; 434. a drive ramp;

31', a power switch;

42', an opening linkage; 451. a fourth limiting part;

43', a locking member; 441. a second body; 442. a third limiting part; 443. a second avoidance portion.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

As shown in fig. 1 to 4, according to a first embodiment of the present invention, there is provided a spray gun including: a housing 10, a valve stem assembly 20, a fan module 30, and an operating assembly. The shell 10 is provided with a gas outlet 11 and a discharge port 12 which are independent of each other, wherein the gas outlet 11 is used for spraying gas, and the discharge port 12 is used for spraying coating and atomizing the coating under the action of the gas at the gas outlet 11. A valve stem assembly 20 is movably disposed within the housing 10, the valve stem assembly 20 being used to close off or open the discharge port 12. The fan module 30 is disposed in the housing 10, and the fan module 30 includes a motor and a fan. Wherein the rotation speed of the motor is more than 60000 rpm. The fan is driven by the motor to rotate, and the fan can suck air into the housing 10 during rotation and blow the sucked air to the air outlet 11 and the paint can containing paint. The operating assembly is used for controlling the valve rod assembly 20 and the fan module 30, the operating assembly acts by firstly starting the fan module 30 and controlling the valve rod assembly 20 to open the discharge hole 12 after the fan module 30 works for a preset time. That is, only after the fan module 30 is started and the fan module 30 is operated for a period of time, the valve rod assembly 20 can be controlled to open the discharge hole 12. Through setting up the operating assembly, make fan module 30 can work a period earlier, can make fan module 30 provide the wind-force and the wind pressure that meet the requirements like this, then open discharge gate 12 again, can guarantee like this that coating can be atomized when discharge gate 12 blowout, can not appear because wind-force is not enough when just opening and lead to coating to be the phenomenon emergence that the beam-shaped jetted out.

It should be noted that, here, the preset time refers to a time required by the fan module to operate when the fan module is started to generate wind power and wind pressure meeting requirements.

The spray gun provided by the present embodiment includes a housing 10, a valve stem assembly 20, a fan module 30, and an operating assembly. Through operating module control valve rod assembly 20 and fan module 30, fan module 30 is opened earlier to the accessible operating module during the use, utilizes fan module 30 to last after working for a period, and discharge gate 12 is opened to rethread operating module control valve rod assembly 20. Through the structure, enough wind power and wind pressure can be supplied to fan module 30 before discharge gate 12 is opened, and coating is when 12 blowout through the discharge gate, and the air of gas outlet 11 can reach the requirement with coating atomizing, guarantees coating blowout quality, avoids appearing because wind-force is not enough and leads to coating to be the phenomenon that the beam form jets out, has guaranteed the result of use of spray gun.

Wherein the operating assembly comprises a trigger 41, the trigger 41 is movably arranged on the housing 10, and the valve rod assembly 20 can be driven by the trigger 41 to close or open the discharge hole 12. Specifically, one end of the trigger 41 is installed in the housing 10 through a rotating shaft, and the other end of the trigger 41 protrudes from the housing 10 for a user to manipulate.

The operating assembly can control the valve rod assembly 20 to move by using a trigger 41, and the fan module 30 is controlled to work by other control elements; the trigger 41 can also be used for controlling the action of the fan module 30 and the valve rod assembly 20; the sequence control can also be realized by arranging a circuit board and controlling the working and starting sequence of the valve rod assembly 20 and the fan module 30 through a circuit.

The blower module 30 includes a power switch 31, the operating assembly further includes a switch linkage member 42, the switch linkage member 42 is movably disposed on the housing 10, the switch linkage member 42 has a first end for abutting against the trigger 41, and a second end for triggering the power switch 31; the switch linkage member 42 moves to trigger the power switch 31 to turn on the fan module 30.

In this embodiment, the trigger 41 is in driving connection with the fan module 30, i.e., the fan module 30 and the valve stem assembly 20 are controlled by the trigger 41. The trigger 41 has a standby position, a power-on position, and a discharge position, which are sequentially arranged in the moving direction thereof. When the trigger 41 moves from the standby position to the power-on position, the switch linkage 42 triggers the power switch 31, and the switch linkage starts the fan module 30; when the trigger 41 is moved from the on position to the discharge position, the valve stem assembly 20 opens the discharge port 12. Specifically, a certain interval is provided between the starting position and the discharging position, so that the trigger 41 can need a certain time when moving from the starting position to the discharging position, and the time is used for the operation of the fan module 30. The operation sequence of the valve rod assembly 20 and the fan module 30 is controlled by optimizing the stroke of the trigger 41, so that the operation can be conveniently carried out by a user. The device has simple structure, is convenient to design and install and can reduce the cost.

As shown in fig. 1, in the present embodiment, the power switch 31 is provided with a mating portion 311 and a contact 312, one end of the switch link 42 abuts against the trigger 41, the other end of the switch link 42 drives the mating portion 311, and when the mating portion 311 abuts against the contact 312, the circuit is turned on, and the fan module 30 is started and performs air suction. In the process that the trigger 41 moves from the standby position to the starting position and then to the discharging position, the trigger 41 drives the opening linkage piece 42 to move all the time. In this embodiment, the extending direction of the mating portion 311 is the same as the moving direction of the switch linkage member 42, so that the switch linkage member 42 can continuously abut against the mating portion 311 in the process of moving the trigger 41 from the power-on position to the power-off position, so that the mating portion 311 always abuts against the contact 312, and the fan module 30 can be always in the on state in the process of moving the trigger 41.

Specifically, the valve stem assembly 20 includes a spray bar 21, a drive section 22, and a return member 23. Wherein, spray lance 21 is movably arranged in housing 10, and one end of spray lance 21 is arranged corresponding to discharge port 12 to close or open discharge port 12. The driving part 22 is arranged on the spray rod 21, the trigger 41 and the driving part 22 are correspondingly arranged, the trigger 41 has a separation state which is not in contact with the driving part 22 and a contact state which is in contact with the driving part 22 in the moving process, and when the trigger 41 is in contact with the driving part 22, the trigger 41 can drive the spray rod 21 to move so that the spray rod 21 opens the discharge port 12. A reset element 23 is arranged between spray bar 21 and housing 10, reset element 23 serving to reset spray bar 21, i.e. reset element 23 provides a force that urges spray bar 21 to block discharge orifice 12. As shown in fig. 5 to 8, the trigger 41 has a pressing portion 411, and the pressing portion 411 is specifically a side wall surface of the trigger 41, and the surface may be a flat surface, a slope surface, or a curved surface.

In the present embodiment, the return element 23 is a spring, and the spring is sleeved on one end of the spray rod 21 far away from the discharge hole 12. A boss is provided on the side wall of the spray bar 21, one end of the spring abuts against one side of the boss, and when the trigger 41 is not applied with force, the spring applies force to the spray bar 21 so that the spray bar 21 blocks the discharge port 12.

A reset element may be provided on the trigger 41 or the switch linkage 42, so that the trigger 41 can be automatically returned to the starting position after the spray gun has been operated.

In this embodiment, trigger 41 middle part is provided with dodges the hole, and spray lance 21 passes this dodge hole, and the one end of dodging the hole and being close to discharge gate 12 is provided with the chimb, and this chimb is used for with the boss butt on the spray lance 21 to drive spray lance 21 and remove and open discharge gate 12.

As shown in fig. 1 and 5, the trigger 41 is at the standby position, the nozzle rod 21 is closed at the discharge port 12, the pressing portion 411 is separated from the driving portion 22, and the mating portion 311 does not trigger the contact 312. When a user pulls the trigger 41, as shown in fig. 2 and 6, the trigger 41 drives the opening-closing movable member 42 to move, so as to drive the mating portion 311 to contact with the contact 312, the blower module 30 starts and starts to operate, at this time, the pressing portion 411 of the trigger 41 does not contact with the valve rod assembly 20, the discharge opening 12 is in a closed state, and at this time, the trigger 41 is in an open position. When the user continues to press the trigger 41, as shown in fig. 3 and 7, the switch-associated member 42 moves along the direction of the mating portion 311, and continues to press the mating portion 311 so that the mating portion 311 is always in contact with the contact 312, thereby ensuring that the fan module 30 is always in the working state. The pressing portion 411 of the trigger 41 is just in contact with the driving portion 22 at this time, and the discharge port 12 is still in the closed state. As shown in fig. 4 and 8, when the user continues to press the trigger 41, the pressing portion 411 of the trigger 41 abuts against the driving portion 22 and moves rightward to drive the spray bar 21 to move rightward, the reset piece 23 is pressed to be in a compressed state, the discharge port 12 is opened, and the trigger 41 is in the discharge position, so that the paint can be sprayed out of the discharge port 12.

Here, the preset time is a time period that elapses when the trigger 41 moves from the power-on position to the discharging position. As can be seen from fig. 21, the section a is that the trigger 41 abuts against the opening linkage member 42 to trigger the fan module 30 to operate; the section B is an idle stroke section of the trigger 41, and the fan module 30 continuously works in the process that the trigger 41 moves in the idle stroke section; segment C is trigger 41 contacting drive 22 and causing spray bar 21 to open discharge port 12. Wherein, a0 corresponds to the aforementioned start-up position, and at this time, the trigger 41 abuts against the opening linkage member 42, so as to start the fan module 30; a2 corresponds to the discharge position described above, and at this time, the trigger 41 abuts against the drive section 22 and can drive the spray bar 21 to open the discharge port 12. Of course, the opening of the fan module 30 may be the opening and closing stroke of the fan at any time point from the section a0 to the section a1, and correspondingly, the opening of the discharge port 12 may also be the opening stroke of the spray bar at any time point from the section C. That is, the on position corresponds to any one of the time points of the sections a0 to a1, and the off position corresponds to any one of the time points of the section C.

Through the structure, the coating can be sprayed out from the discharge port 12, wind power is supplied through the fan module 30 in advance, the wind at the air outlet 11 meets the requirement of atomizing the coating, and the using effect of the spray gun is improved. And through this structure, when returning trigger 41 left drive to the standby position, also close discharge gate 12 earlier, close fan module 30 again, can guarantee like this that fan module 30 still can provide sufficient atomizing wind-force before stopping spouting, avoid appearing fan module 30 and stop earlier the back, the air that gas outlet 11 discharged can't reach the atomizing requirement for final coating is the form blowout of restrainting. Therefore, the using effect of the spray gun can be further improved.

When the trigger 41 moves from the discharge position to the standby position, the opening/closing link member 42 loses its driving action of the trigger 41 and moves together with the trigger 41 by the reset member.

Example two

In the second embodiment of the present invention, as shown in fig. 9 to 14, the second embodiment adopts the structure of the housing 10, the valve rod assembly 20 and the fan module 30 in the first embodiment, and the power switch 31 and the switch linkage 42 also adopt the structure in the first embodiment, the second embodiment is different from the first embodiment in that the operating assembly further includes a locking member 43, the locking member 43 is movably disposed on the housing 10, the locking member 43 has at least a limiting position and a avoiding position, and when the locking member 43 is located at the limiting position, the locking member 43 limits the movement of the trigger 41 through the opening linkage 42; when the lock member 43 is in the retracted position, the lock member 43 drives the opening-closing movable member 42 to activate the power switch 31, and at the same time, the restricting action of the lock member 43 on the trigger 41 is released, and the trigger 41 is free to move. In the present embodiment, the locking member 43 triggers the power switch 31 through the opening-associated movable member 42, and it is also possible to arrange that the power switch 31 is directly triggered by the locking member 43, that is, the locking member 43 has a restricting position and a retracted position, and directly triggers the power switch 31 in the retracted position.

By providing the locking member 43, the sequence of actuation of the blower module 30 and the valve stem assembly 20 can be further assured, providing safety for use of the spray gun. When the user uses, need operate locking piece 43 earlier, move locking piece 43 to the position of dodging after, operate trigger 41 again to make trigger 41 move to ejection of compact position. Can utilize locking piece 43 to influence user's operation action like this, can reserve the preparation time for fan module 30, prolong fan module 30's operating time, make fan module 30 have the longer time of induced drafting before discharge gate 12 is opened.

Specifically, in the present embodiment, the power switch 31 is also provided with the mating portion 311 and the contact 312, and the switch-associated metal fitting 42 can be driven to move by the locking member 43 so that the mating portion 311 abuts against the contact 312.

The locking member 43 may be provided corresponding to the trigger 41 or the opening/closing movable member 42. In the present embodiment, the locking member 43 is provided corresponding to the opening/closing movable member 42. Specifically, the locking member 43 includes a first body 431 and a first stopper portion 432, and the first stopper portion 432 is provided on the first body 431. The opening-linking moving member 42 has a second position-limiting portion 421, and the second position-limiting portion 421 cooperates with the first position-limiting portion 432 to limit the movement of the opening-linking moving member 42. Specifically, in the limiting position, the first limiting portion 432 is engaged with the second limiting portion 421; in the retracted position, the first stopper portion 432 is disengaged from the second stopper portion 421. In this embodiment, the movement direction of the locking member 43 and the movement direction of the switch link member 42 are perpendicular to each other, so that when the first position-limiting portion 432 is engaged with the second position-limiting portion 421, the movement of the switch link member 42 is limited, and thus the movement of the trigger 41 is limited. Of course, the moving directions of the locking member 43 and the switch link 42 may be set to other angles as needed as long as the two can interfere with each other.

The first body 431 is further provided with a driving inclined surface 434, and the switch linkage 42 is correspondingly provided with a matching surface 422 matched with the driving inclined surface 434; when the locking member 43 moves from the restricting position to the retracted position, the driving inclined surface 434 abuts against the mating surface 422 to drive the switch-associated member 42 to activate the power switch 31.

Specifically, one end of the first body 431 is a first button portion, the first limit portion 432 is disposed at the other end of the first body 431, and a first escape portion 433 is disposed in the middle of the first body 431. The middle part of the opening linkage member 42 is provided with a second limiting part 421, the opening linkage member 42 is arranged in the first avoiding part 433 in a penetrating manner, the first button part and the first limiting part 432 are respectively positioned at two sides of the opening linkage member 42, and the second limiting part 421 is matched with the first limiting part 432 to limit the movement of the opening linkage member 42. The first position-limiting portion 432 is a position-limiting protrusion, and the second position-limiting portion 421 is a position-limiting groove. When the locking member 43 moves from the first limit position to the first escape position, the driving inclined surface 434 abuts against the engagement surface 422 and drives the opening-related movable member 42 to move, so that the opening-related movable member 42 abuts against the engagement portion 311, the engagement portion 311 contacts with the contact 312, and the fan module 30 starts to operate after being electrically conducted.

When the user is not using the spray gun, as shown in fig. 12, the locking member 43 is in the restricting position and the trigger 41 is in the standby position, in which the trigger 41 cannot be moved. When using the spray gun, as shown in fig. 13, the user first operates the locking member 43 to move the locking member 43 from the restricting position to the avoiding position, and at the same time, the driving inclined surface 434 drives the opening-closing movable member 42 to move by a moving distance L1, the opening-closing movable member 42 and the locking member 43 are displaced, the opening-closing movable member 42 is pressed in contact with the mating part 311, the fan module 30 is opened, and the trigger 41 is unlocked. Then, the user presses the trigger 41 again, the trigger 41 starts to move from the standby position, and after contacting the switching member 42 in the moving process, the switching member 42 is driven to continue moving, and is contacted and contacted with the driving portion 22 on the spray bar 21 through the trigger 41, as shown in fig. 14, the trigger 41 drives the spray bar 21 to move through the driving portion 22 and open the discharge port 12, and the trigger 41 is at the discharge position at this time, and the moving distance is L2.

With the above structure, when the spray gun is started to use, a user needs to operate the locking member 43 and then the trigger 41 to spray paint. Therefore, before the discharge port 12 is opened, sufficient preparation time is provided for subsequent atomization of the fan module 30, and the atomization effect of the coating is further ensured.

EXAMPLE III

In the third embodiment, the third embodiment adopts the structures of the housing 10, the valve rod assembly 20 and the fan module 30 in the second embodiment, and the third embodiment is different from the second embodiment in that the structure for triggering the fan module 30 to operate is different. As shown in fig. 15 to 20, the operating assembly further includes a locking member 43 ', the locking member 43 ' being movably disposed on the housing 10, the locking member 43 ' having a restricting position and an escape position, the locking member 43 ' restricting movement of the trigger 41 when the locking member 43 ' is in the restricting position; when the locking member 43 ' is located at the escape position, the locking member 43 ' opens the fan module 30, and at the same time, the restriction of the locking member 43 ' on the trigger 41 is released. Through the structure, can utilize locking piece 43 ' to influence user's operation order, only remove locking piece 43 ' earlier to dodging the position after, just can control trigger 41 and open discharge gate 12, this operation needs to be carried out respectively, just so provides sufficient preparation time for the follow-up atomizing of fan module 30, make the user when opening discharge gate 12, coating can be in discharge gate 12 department complete atomization, has guaranteed the effect of spraying paint of spray gun.

Wherein, the valve rod assembly 20 can be controlled to move by the trigger 41, and the suction of the fan module 30 is controlled by the locking piece 43'. The trigger 41 and the locking piece 43' can be used together to control the operation of the fan module 30.

In this embodiment, the fan module 30 includes a power switch 31 ', and a locking member 43' is disposed corresponding to the power switch 31 ', and when the locking member 43' is located at the avoiding position, the locking member 43 'triggers the power switch 31' to operate the fan module 30. The power switch 31 ' may be disposed on an inner wall of the housing, the power switch 31 ' may be a contact switch, the blower module 30 may be opened when the locking member 43 ' abuts against the power switch 31 ', and the blower module 30 may be closed when the locking member 43 ' is separated from the power switch 31 ' by resetting the power switch 31 '.

The locking member 43' may be provided on the trigger 41, or may be provided at other positions. Specifically, the operating assembly further includes an opening and closing movable member 42 ', the opening and closing movable member 42' is movably disposed on the housing 10, one end of the opening and closing movable member 42 'is used for abutting against the trigger 41, and the position of the opening and closing movable member 42' is similar to that of the embodiment 1 and the embodiment 2, and is generally shown in fig. 1. It should be noted that, in the present embodiment, the power switch 31 'is disposed on the switch linkage member 42'. As shown in fig. 16. When the locking member 43' is located at the restricting position, as shown in fig. 18. At this time, the locking piece 43 'limits the movement of the opening linkage piece 42' on one hand, so as to limit the movement of the trigger 41, and on the other hand, the locking piece 43 'is separated from the power switch 31', and the fan module 30 is not opened; when the locking member 43' is moved to the retracted position, as shown in fig. 19. At this time, the restriction of the lock member 43 ' on the opening/closing link member 42 ' is released, the restriction of the lock member 43 ' on the trigger is released, and at the same time, the lock member 43 ' contacts the power switch 31 ', and the fan module 30 is opened.

The locking member 43' includes a second body 441 and a third position-limiting portion 442, and the third position-limiting portion 442 is disposed on the second body 441. The opening-linking member 42 ' has a fourth limiting portion 451, the third limiting portion 442 cooperates with the fourth limiting portion 451 to limit the movement of the opening-linking member 42 ', and when the locking member 43 ' moves from the limiting position to the avoiding position, the locking member 43 ' triggers the power switch 31 '.

Specifically, one end of the second body 441 is a second button portion, the third stopper portion 442 is disposed at the other end of the second body 441, and a second escape portion 443 is disposed in the middle of the second body 441. The middle portion of the movable opening-linking member 42 ' has a fourth limit portion 451, the movable opening-linking member 42 ' is inserted into the second escape portion 443, and the second button portion and the third limit portion 442 are respectively located at two sides of the movable opening-linking member 42 '. The third position-limiting portion 442 is a position-limiting protrusion, and the fourth position-limiting portion 451 is a position-limiting groove. When the locking member 43 ' moves from the restricting position to the avoiding position, the locking member 43 ' contacts the power switch 31 ' to turn on the fan module 30.

As shown in fig. 18, when the user does not operate the spray gun, the trigger 41 is in the standby position, the lock member 43' is in the restricting position, and the trigger 41 cannot move. When the user uses the spray gun, as shown in fig. 19, the locking member 43 'is operated to move the locking member 43' from the restricting position to the avoiding position, and the end of the locking member 43 'contacts the power switch 31', so that the circuit is conducted, the fan module 30 is turned on, and the trigger 41 is unlocked. Then, the user presses the trigger 41, as shown in fig. 20, when the trigger 41 moves from the standby position to the discharging position, the trigger 41 contacts and abuts against the switch linkage 42 'and drives the switch linkage 42' to move together, and the trigger 41 drives the valve rod assembly 20 to move during the moving process, so that the discharging hole 12 is opened.

In this embodiment, if the switch-associated moving member 42' is configured to control the operation of the fan module 30, the power switch 31, the mating part 311, and the contact 312 may be configured, and the trigger 41 may have the power-on position and the discharging position, as described in the first and second embodiments. Thus, even if the user releases the locking member 43', the fan module 30 still operates to suck air.

In the second and third embodiments, when the trigger is driven to return to the standby position to the left, the discharge port 12 is also closed first, and then the fan module 30 is closed, so that it can be ensured that the fan module 30 can still provide sufficient atomized wind power before the coating stops spraying, and it is avoided that the air discharged from the air outlet 11 cannot reach the atomization requirement after the fan module 30 stops first, so that the final coating is sprayed in a beam shape. Therefore, the using effect of the spray gun can be further improved.

Specifically, when the trigger 41 moves from the discharge position to the standby position, the valve stem assembly first closes the discharge port; because the switch linkage piece loses the driving effect of the trigger on the switch linkage piece, the switch linkage piece returns to the initial position under the effect of the reset piece, and when the switch linkage piece returns to the initial position, the locking piece also returns to the limiting position under the effect of the reset piece.

Method

In another embodiment of the present invention, the method for controlling a spray gun includes a blower module and a valve rod assembly, the valve rod assembly is used for plugging or opening a discharge port of the spray gun, and when the spray gun is started, the method for controlling the spray gun includes:

firstly, starting a fan module;

after the fan module is opened for the preset time, the valve rod assembly is controlled to open the discharge hole.

Set up like this, can guarantee that the discharge gate is before opening, the fan module can have sufficient operating time, makes wind-force reach the atomizing requirement, and then can guarantee to open the back at the discharge gate, and spun coating can be atomized, has guaranteed the result of use of spray gun.

When the spray gun is closed, the spray gun control method further comprises the following steps:

firstly, controlling the valve rod assembly to close the discharge hole;

and then controlling the fan module to stop working.

Through the control method, the fan module can work all the time before the discharge port is closed, so that the sprayed coating can be atomized, the phenomenon that the fan module stops working and the coating cannot be atomized after being sprayed out due to weakening of wind power is avoided, and the using effect of the spray gun is further ensured.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A spray gun, characterized in that it comprises:

the shell is provided with an air outlet and a discharge hole which are mutually independent;

the valve rod assembly is movably arranged in the shell and is used for plugging or opening the discharge hole;

the fan module is arranged in the shell and comprises a motor and a fan, and the motor is used for driving the fan to rotate;

the operating assembly is used for controlling the valve rod assembly and the fan module; the operation component acts, and firstly the fan module is started; and after the fan module works for a preset time, the valve rod assembly is controlled to open the discharge hole.

2. The spray gun of claim 1 wherein said operating assembly includes a trigger movably disposed on said housing for actuating said valve stem assembly to close or open said discharge port.

3. The spray gun of claim 2 wherein said valve stem assembly comprises:

the spray rod is movably arranged in the shell, and one end of the spray rod is used for plugging or opening the discharge hole;

the driving part is arranged on the spray rod; the trigger is movable to have a separated state where it is not in contact with the driving part and a contact state where it is in contact with the driving part, and when the trigger is in contact with the driving part, the trigger drives the spray bar to move.

4. The spray gun of claim 3 wherein said valve stem assembly further comprises a reset disposed between said spray bar and said housing, said reset providing a force that urges said spray bar to block said discharge orifice.

5. The spray gun of claim 2 wherein said operating assembly further comprises a locking member movably disposed on said housing, said locking member having a restrained position and an avoided position; when the lock member is located at the limit position, the lock member limits the trigger movement; when the locking piece is located at the avoiding position, the limiting effect of the locking piece on the trigger is removed, and meanwhile, the fan module is opened by the locking piece.

6. The spray gun of claim 5 wherein said operating assembly further comprises an open linkage movably disposed on said housing, said open linkage having a first end for abutment with said trigger; when the locking member is located at the restricting position, the locking member restricts the movement of the trigger by the opening linkage member.

7. The spray gun of claim 6, wherein the locking member is provided with a first limiting portion, and the opening linkage member is correspondingly provided with a second limiting portion matched with the first limiting portion; when the position is limited, the first limiting part is matched with the second limiting part; when the position is avoided, the first limiting part is disengaged from the second limiting part.

8. The spray gun of claim 6 wherein said fan module includes a power switch, said switch linkage further having a second end for abutting said power switch; when the locking piece is located at the avoiding position, the locking piece drives the switch movable piece to trigger the power switch, and the fan module is started.

9. The spray gun of claim 8 wherein said locking member is provided with a drive ramp; the switch linkage piece is correspondingly provided with a matching surface matched with the driving inclined surface; when the locking piece moves from the limiting position to the avoiding position, the driving inclined surface is abutted to the matching surface, and the switch linkage piece is driven to trigger the power switch.

10. The spray gun of claim 6 wherein said fan module further comprises a power switch disposed on said switch linkage; when the locking piece moves from the limiting position to the avoiding position, the locking piece triggers the power switch to start the fan module.

11. The spray gun of claim 2 wherein said trigger has a standby position, an on position and an off position sequentially arranged along its direction of movement, said trigger turning on said fan module when said trigger is moved from said standby position to said on position; when the trigger moves from the starting position to the discharging position, the valve rod assembly opens the discharging hole.

12. A method of controlling a spray gun, the spray gun including a blower module and a valve stem assembly for plugging or unplugging a discharge port of the spray gun, the method comprising, upon starting the spray gun:

firstly, starting the fan module;

after the fan module is started for a preset time, the valve rod assembly is controlled to be opened to the discharge port.

13. The lance control method of claim 12, further comprising, while shutting down the lance:

firstly, controlling the valve rod assembly to close the discharge hole;

and then controlling the fan module to stop working.