Multi-gear handheld spray gun

Abstract

The utility model provides a multi-gear handheld spray gun which comprises a shell, a water pipe, a nozzle and a water valve, is used for spraying steam generated by a steam cleaning machine, and further comprises a pressing switch mechanism and a sliding gear switching mechanism. The pressing switch mechanism comprises a key, and the key is used for pressing the water valve to open the multi-gear handheld spray gun; the sliding gear switching mechanism comprises a sliding button and a sliding groove formed in the shell, the sliding button slides in the sliding groove and is fixed to the preset gear position, the sliding button comprises a plurality of limiting stop blocks with different heights, and when the sliding button is located at the different preset gear positions, the key is aligned to the different limiting stop blocks. The limiting stop block is used for limiting the stroke of the key so as to adjust the maximum air flow of the multi-gear handheld spray gun. According to the multi-gear handheld spray gun, a switch for spraying steam can be directly controlled, the air flow of the steam can be accurately controlled, and the multi-gear handheld spray gun is convenient and simple to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of steam cleaning machines, in particular to a multi-position handheld spray gun. Background Art

[0002] A steam cleaner is a cleaning machine that includes a steam-generating device, an air pipe, and a handheld spray gun. It uses the high-pressure and high-temperature steam generated by the steam-generating device to achieve the cleaning effect. The air pipe connects the steam-generating device and the handheld spray gun, and releases the steam through the handheld spray gun.

[0003] There are many steam cleaning products on the market, but the switch for controlling the steam production device and the switch for the steam gas flow are both set on the body of the cleaning machine, while the handheld spray gun is not set with a switch to directly control the steam, and it is not convenient to control the opening and closing of the steam spray. Or the handheld spray gun has a structure to control the steam switch but cannot accurately control the gas flow of the steam spray, which makes the user experience not good. Therefore, there is a lack of a handheld structure with gear adjustment, which can accurately control the output steam volume and can directly control the steam spray switch. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a multi-speed handheld spray gun, which directly controls the switch for spraying steam by pressing a switch mechanism and a sliding gear switching mechanism, and can accurately control the gas flow rate of steam, and is easy and convenient to operate.

[0005] The utility model provides a multi-gear handheld spray gun, comprising a housing, a water pipe, a nozzle and a water valve, for spraying steam generated by a steam cleaning machine. The multi-gear handheld spray gun also comprises a pressing switch mechanism and a sliding gear switching mechanism;

[0006] The push switch mechanism includes a button, and the button is used to press the water valve to open the multi-position handheld spray gun;

[0007] The sliding gear switching mechanism includes a sliding button and a sliding groove opened on the shell, the sliding groove is used for the sliding button to slide therein and be fixed at a preset gear position, the sliding button includes a plurality of limit stops of different heights, when the sliding button is at different preset gear positions, the button is located at different limit stops, and the limit stops are used to limit the stroke of the button to adjust the maximum air flow of the multi-speed handheld spray gun.

[0008] Specifically, the water valve includes a water inlet sleeve and a water outlet sleeve, and the inlet of the water inlet sleeve is provided with a flange for guiding the water pipe to be sleeved onto the water inlet sleeve; the nozzle is detachably mounted on the water outlet sleeve; the water inlet sleeve and the water outlet sleeve are respectively used to connect the water pipe and the nozzle with the inner cavity of the water valve to form an air outlet channel.

[0009] Specifically, the water valve includes a valve core and a first elastic return member arranged in its inner cavity. The side of the valve core is provided with an extrusion block, and the side of the inner cavity of the water valve is provided with a matching block corresponding to the extrusion block. The first elastic return member is used to provide a pre-tightening force so that the extrusion block squeezes the matching block to keep the multi-speed handheld spray gun closed. At this time, one end of the valve core away from the first elastic return member penetrates the water valve and extends out.

[0010] Specifically, the inner cavity of the water valve is divided into two chambers by the extrusion block and the matching block, the water pipe and the nozzle are respectively connected to different chambers, the air flow rate of the multi-speed handheld spray gun is determined by the opening between the extrusion block and the matching block, and the button is used to apply pressure to the valve core to drive the extrusion block to move relative to the matching block to adjust the opening.

[0011] Specifically, the moving direction of the valve core is a straight line, the angle between the flow direction of the water pipe and the moving direction of the valve core is set at a preset angle, and the angle between the flow direction of the nozzle and the moving direction of the valve core is set at a preset angle, which is used to reduce the force of the air flow or water flow on the valve core when it moves.

[0012] Specifically, the water valve further comprises a plug, which is detachably and separably mounted on the water valve and is used for inspecting the inner cavity of the water valve after disassembly.

[0013] Specifically, the button includes a first pressing portion and a second pressing portion. When the button is pressed, the first pressing portion applies pressure to the water valve and / or the second pressing portion applies pressure to the limit stop block.

[0014] Specifically, the button also includes a rotating shaft, the button is installed on the shell through the rotating shaft and when the button is pressed, the button rotates along the axis of the rotating shaft; the button is in an elongated shape, the second pressing portion and the rotating shaft are located at both ends of the button, and the first pressing portion is located in the middle position of the button; the push switch mechanism also includes a second elastic reset member, the second elastic reset member is installed between the water valve and the button, and the button has a tendency to stay away from the water valve through the elastic action of the second elastic reset member.

[0015] Specifically, the limit stop includes a first limit stop, the distance from the button to the first limit stop is greater than the distance from the button to the water valve, and the moving distance of the water valve reaches a maximum when the button hits the first limit stop.

[0016] Specifically, the limit stop also includes a second limit stop, the distance from the button to the second limit stop is smaller than the distance from the button to the water valve, and when the button hits the first limit stop, the moving distance of the water valve is zero.

[0017] In summary, the embodiment of the utility model directly controls the switch for spraying steam by pressing the switch mechanism and the sliding gear switching mechanism, and can accurately control the gas flow rate of steam, and the operation is convenient and simple.

[0018] Moreover, through the design of multiple limit stops at different heights, the air flow rate can be controlled to switch at different gears, and the locking function is realized when the gear is switched to zero air flow.

[0019] Moreover, the moving direction of the valve core is a straight line, the angle between the flow direction of the water pipe and the moving direction of the valve core is set at a preset angle, and the angle between the flow direction of the nozzle and the moving direction of the valve core is set at a preset angle, which is used to reduce the force of the airflow or water flow on the valve core when it moves. When steam flows from the water pipe into the inner cavity of the water valve through the water inlet sleeve, due to the angle between the water inlet sleeve and the moving direction of the valve core, part of the impact force exerted by the steam on the valve core is offset by the water valve wall, and the valve core is not easily pushed by the impact force of the steam. This design can improve the accuracy of steam gas flow control, and at the same time can avoid safety problems caused by the valve core being opened or closed by mistake, thereby improving the safety and control accuracy of the spray gun. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 The structure explosion of the multi-position handheld spray gun in the embodiment of the utility model Figure 1 ;

[0022] Figure 2 The structure explosion of the multi-position handheld spray gun in the embodiment of the utility model Figure 2 ;

[0023] Figure 3 It is a cross-sectional view of a multi-position handheld spray gun in an embodiment of the utility model;

[0024] Figure 4 This is a structural explosion diagram of a water valve in an embodiment of the utility model;

[0025] Figure 5 It is a cross-sectional view of a water valve in an embodiment of the utility model;

[0026] Figure 6 It is a partial enlarged schematic diagram of the slideway in the embodiment of the utility model;

[0027] Figure 7 It is a cross-sectional view of the push-twist in the embodiment of the utility model;

[0028] Figure 8 It is a partial enlarged cross-sectional view of the embodiment of the utility model when the protrusion is placed in the first gear position;

[0029] Fig. 9 It is a partial enlarged cross-sectional view of the embodiment of the utility model when the protrusion is placed in the second gear position;

[0030] Fig.10 It is a partially enlarged cross-sectional view of the embodiment of the utility model when the protrusion is placed in the third gear position.

[0031] Among them, the reference numerals of the embodiments of the utility model in the above drawings are as follows:

[0032] 10. Shell; 20. Water pipe; 30. Nozzle;

[0033] 40, water valve; 41, valve core; 411, extrusion block; 412, first sealing ring; 413, second sealing ring; 42, first elastic reset member; 43, water inlet sleeve; 44, water outlet sleeve; 441, third sealing ring; 45, matching block; 46, plug; 461, fourth sealing ring;

[0034] 50. Push switch mechanism; 51. Button; 511. First pressing portion; 512. Second pressing portion; 513. Rotating shaft; 52. Second elastic reset member;

[0035] 60. Sliding gear switching mechanism; 61. Sliding button; 611. Protrusion; 612. First limit stop block; 613. Second limit stop block; 614. Third limit stop block; 62. Sliding slot; 621. First gear position; 622. Second gear position; 623. Third gear position. DETAILED DESCRIPTION

[0036] The following will describe in detail a specific embodiment of the utility model in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the description of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] In the description of the present utility model, unless otherwise clearly specified and limited, the terms "set", "install", "connection" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0038] The directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the utility model.

[0039] The terms "first", "second", "third" and the like are merely used to distinguish elements of similar nature, and do not indicate or imply relative importance or a particular order.

[0040] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of the elements listed and may also include additional elements not expressly listed.

[0041] The following is a detailed description through specific embodiments.

[0042] like Figures 1 to 3 As shown, the embodiment of the utility model provides a multi-gear handheld spray gun, including a housing 10, a water pipe 20, a nozzle 30, a water valve 40, a push switch mechanism 50 and a sliding gear switching mechanism 60. The water pipe 20, the nozzle 30 and the water valve 40 are connected to form an air outlet channel, and the steam in the air outlet channel flows from the water pipe 20 to the water valve 40, passes through the water valve 40 and then flows out of the spray gun from the nozzle 30;

[0043] The housing 10 includes two left and right side housings, a front housing and a rear housing, wherein the left housing and the right housing are provided with a fixed water pipe 20, a nozzle 30, a water valve 40, a push switch mechanism 50 and a sliding gear switching mechanism 60. When the left and right housings are closed, the front and rear housings are fixedly connected by screw thread rotation. Specifically, the front and rear housings are provided with openings for the nozzle 30 and the water pipe 20 to extend out, respectively, the right housing is provided with an opening for the sliding gear switching mechanism 60 to extend out, and the bottom of the left and right housings are provided with openings for the push switch mechanism 50 to extend out. The housing 10 is ergonomically designed as a whole, similar to a pistol shape, the push switch mechanism 50 adopts a trigger design, and the sliding gear switching mechanism 60 adopts a sliding button design. When in use, the thumb controls the sliding gear switching mechanism 60 and the index finger controls the push switch mechanism 50, and one hand can easily operate it.

[0044] The water valve 40 includes a valve core 41 and a first elastic reset member 42 disposed in its inner cavity. The valve core 41 has a tendency to keep blocking the air outlet passage due to the elastic action of the first elastic reset member 42.

[0045] The push switch mechanism 50 includes a button 51 and a second elastic reset member 52. The button 51 is used to press the valve core 41 to open the air outlet passage. The second elastic reset member 52 is installed between the water valve 40 and the button 51. The button 51 has a tendency to stay away from the valve core 41 due to the elastic action of the second elastic reset member 52. Therefore, under the action of the second elastic reset member 52, the button 51 will not press the valve core 41 in the default state, the water valve 40 remains in a blocked state and the air outlet passage is closed; and after releasing the button 51, the button 51 can be restored to the default position under the elastic force of the second elastic reset member 52 and / or the valve core 41;

[0046] The sliding gear switching mechanism 60 includes a sliding button 61 and a sliding groove 62 provided on the housing 10. The sliding groove 62 is used for the sliding button 61 to slide therein and be fixed at a preset gear position. The sliding button 61 includes a plurality of limit stops of different heights provided on the sliding button 61. When the sliding button 61 is at different preset gear positions, the button 51 is located at different limit stops. The limit stops are used to limit the stroke of the button 51 to adjust the maximum flow rate of the air outlet channel. Specifically, in the embodiment of the utility model, three limit stops are provided, and three preset gears are provided on the corresponding sliding groove 62.

[0047] like Figure 4 and Figure 5As shown, in this embodiment, the water valve 40 includes a water inlet sleeve 43, a water outlet sleeve 44 and a third sealing ring 441. The inlet of the water inlet sleeve 43 is provided with a flange for guiding the water pipe 20 to be sleeved on the water inlet sleeve 43; the nozzle 30 is detachably mounted on the water outlet sleeve 44, and a third sealing ring 441 is provided between the nozzle 30 and the water inlet sleeve 43 to strengthen the sealing between the nozzle 30 and the water inlet sleeve 43; the water inlet sleeve 43 and the water outlet sleeve 44 are respectively used to connect the water pipe 20 and the nozzle 30 with the inner cavity of the water valve 40 to form an outlet passage. The two outer sides of the water valve 40 have at least one protruding structure of a cylinder or other shape, and the shell 10 structure (the left and right side shells) has at least one matching storage structure, and the storage structure of the shell can store the protruding structure of the water valve; when the water valve 40 is working, the storage structure can make the valve body of the water valve 40 fixedly connected to the shell 10 and relatively remain stationary.

[0048] like Figure 5 As shown, in this embodiment, the water valve 40 also includes a plug 46 and a fourth sealing ring 461. The plug 46 is detachably and separably mounted on the water valve 40, and is used for inspecting the inner cavity of the water valve 40 after disassembly. A fourth sealing ring 461 is also provided between the plug 46 and the water valve 40, and is used to increase the sealing between the plug 46 and the water valve 40. The first elastic reset member 42 is provided between the plug 46 and the valve core 41, and a groove is provided on the plug 46, and the first elastic reset member 42 is accommodated in the groove. In the default state, the plug 46 and the water valve 40 are fixedly connected and regarded as a whole. The pre-tightening force provided by the first elastic reset member 42 pushes the valve core 41 away from the plug 46, and the groove is used to limit the telescopic direction of the first elastic reset member 42 to prevent it from tilting.

[0049] In this embodiment, the inner cavity of the water valve 40 can be roughly divided into three areas, the area surrounded by the water inlet sleeve 43, the area surrounded by the water outlet sleeve 44 and the valve core 41 cavity area. The valve core 41 is a cylinder, and moves in the valve core 41 cavity area under the pressure of the button 51 and the thrust of the first elastic reset member 42. The valve core 41 and the first elastic reset member 42 are movably arranged in the inner cavity of the water valve 40, and the valve core 41 moves linearly along the inner cavity. The side of the valve core 41 is provided with an extrusion block 411, and the diameter of the extrusion block 411 is relatively large. The side of the inner cavity of the water valve 40 is provided with a matching block 45 corresponding to the extrusion block 411. The first elastic reset member 42 is used to provide a pre-tightening force so that the extrusion block 411 squeezes the matching block 45 to keep the air outlet channel blocked. At this time, the end of the valve core 41 away from the first elastic reset member 42 penetrates the water valve 40 and extends out. The water valve 40 further includes a first sealing ring 412 and a second sealing ring 413. The first sealing ring 412 is sleeved on the bottom of the valve core 41. Since the bottom of the valve core 41 extends out of the water valve 40, the first sealing ring 412 can be used to increase the overall sealing performance of the water valve 40. The second sealing ring 413 is sleeved between the extrusion block 411 and the matching block 45 of the valve core 41, and is used to increase the sealing performance when the extrusion block 411 squeezes the matching block 45.

[0050] In this embodiment, the inner cavity of the water valve 40 is divided into two chambers by the extrusion block 411 and the matching block 45, and the water pipe 20 and the nozzle 30 are connected to different chambers respectively. The air flow rate of the air outlet channel is determined by the opening between the extrusion block 411 and the matching block 45. The button 51 is used to apply pressure to the valve core 41 to overcome the pre-tightening force of the first elastic reset member 42 to drive the extrusion block 411 to move relative to the matching block 45 to adjust the opening. The greater the distance the valve core 41 moves, the greater the distance between the extrusion block 411 and the matching block 45, and the greater the air flow rate of the air outlet channel, and the moving distance of the valve core 41 depends on the moving stroke of the button 51. The control of the water valve 40 does not rely on the structure of the shell 10, and the valve core 41 can also be directly pressed to control the switch of the water valve 40 and the air flow rate by controlling the moving distance of the valve core 41.

[0051] In this embodiment, the moving direction of the valve core 41 is a straight line, the angle between the flow direction of the water pipe 20 and the moving direction of the valve core 41 is set at a preset angle, and the angle between the flow direction of the nozzle 30 and the moving direction of the valve core 41 is set at a preset angle, which is used to reduce the force of the airflow or water flow on the valve core 41 when it moves. When steam flows from the water pipe 20 into the inner cavity of the water valve 40 through the water inlet sleeve 43, due to the angle between the water inlet sleeve 43 and the moving direction of the valve core 41, part of the impact force exerted by the steam on the valve core 41 is offset by the wall of the water valve 40, and the valve core 41 is not easily pushed by the steam impact force. This design can improve the accuracy of steam gas flow control, and at the same time can avoid safety problems caused by the valve core 41 being opened or closed by mistake, thereby improving the safety and control accuracy of the spray gun.

[0052] like Figure 6 and Figure 7 As shown, in this embodiment, the slide groove 62 is used to accommodate the slide button 61 and switch between preset fixed gears. Specifically, the slide groove 62 is provided with three fixed gears, namely, the first gear 621, the second gear 622 and the third gear 623. The slide button 61 is provided with a protrusion 611. When the slide button 61 slides in the slide groove 62, the protrusion 611 cooperates with the fixed gear of the slide groove 62 to fix the slide button 61 at the position of the corresponding gear. The slide button 61 is in the shape of a rectangular parallelepiped. One end of the slide button 61 is provided with a plurality of limit stops arranged horizontally, specifically three, that is, the limit stops include a first limit stop 612, a second limit stop 613 and a third limit stop 614. Specifically, the limit stop block is a pit that matches the second pressing portion 512. Since the second pressing portion 512 collides with the limit stop block from bottom to top, the height of the pit determines the maximum stroke of the second pressing portion 512. Therefore, different gears can be designed by controlling the heights of different limit stops.

[0053] like Figure 8 As shown, in this embodiment, the button 51 includes a first pressing portion 511 and a second pressing portion 512. When the button 51 is pressed, the first pressing portion 511 applies pressure to the valve core 41 and / or the second pressing portion 512 applies pressure to the limit stop.

[0054] In this embodiment, the button 51 further includes a rotation shaft 513, through which the button 51 is mounted on the housing 10 and when the button 51 is pressed, the button 51 rotates along the axis of the rotation shaft 513; the button 51 is in an elongated shape, the second pressing portion 512 and the rotation shaft 513 are located at both ends of the button 51, and the first pressing portion 511 is located in the middle of the button 51. When the button 51 rotates along the rotation shaft 513, the second pressing portion 512 of the button 51 hits a limit stopper, and the button 51 is limited and cannot be pressed further.

[0055] like Figure 8 As shown, in this embodiment, when the slide button 61 is pushed to make the protrusion 611 located at the first gear position 621, the button 51 is pressed, and the second pressing portion 512 is located opposite to the second limit stop block 613. At this time, the distance from the second pressing portion 512 of the button 51 to the second limit stop block 613 is smaller than the distance from the first pressing portion 511 of the button 51 to the valve core 41, and when the button 51 is pressed to the bottom and hits the first limit stop block 612, the moving distance of the valve core 41 is zero. That is, the opening between the extrusion block 411 and the matching block 45 is zero, and the air outlet channel is closed. At this time, the first gear position 621 is equivalent to the locking gear position, and the steam switch is closed.

[0056] like Fig. 9As shown, in this embodiment, when the slide button 61 is pushed to make the protrusion 611 located at the second gear position 622, the button 51 is pressed, and the second pressing portion 512 is located opposite to the third limit stop block 614. At this time, the distance from the second pressing portion 512 of the button 51 to the third limit stop block 614 is greater than the distance from the first pressing portion 511 of the button 51 to the valve core 41, and when the button 51 is pressed to the bottom and hits the first limit stop block 612, the moving distance of the valve core 41 is half of the maximum moving distance. That is, the opening between the extrusion block 411 and the matching block 45 is half of the maximum opening, and the air outlet channel is opened. At this time, the first gear position 621 is equivalent to the low air outlet gear position, and the steam switch is open. After releasing the button 51, the button 51 and the valve core 41 are restored to the default position under the elastic force of the second elastic reset member 52 and the first elastic reset member 42 respectively. At this time, the water valve 40 is turned to the closed state, and the air flow is zero. According to the distance of pressing the button 51, the air flow can be controlled to change from zero to half of the maximum air flow.

[0057] like Fig.10 As shown, in this embodiment, when the slide button 61 is pushed so that the protrusion 611 is located at the third gear position 623, the button 51 is pressed, and the second pressing portion 512 is opposite to the first limit stop block 612. At this time, the distance from the second pressing portion 512 of the button 51 to the first limit stop block 612 is greater than the distance from the first pressing portion 511 of the button 51 to the valve core 41, and the movement distance of the valve core 41 is the maximum when the button 51 is pressed to the bottom and hits the first limit stop block 612. That is, the opening between the extrusion block 411 and the matching block 45 is the maximum opening, and the air outlet channel is open. At this time, the first gear position 621 is equivalent to the high air outlet gear position, the steam switch is open, and the air flow is maximum. After releasing the button 51, the button 51 and the valve core 41 are restored to the default position under the elastic force of the second elastic reset member 52 and the first elastic reset member 42 respectively. At this time, the water valve 40 is turned to the closed state, and the air flow is zero. According to the distance of pressing the button 51, the air flow can be controlled to change from zero to the maximum air flow.

[0058] In summary, the embodiment of the utility model directly controls the switch for spraying steam by pressing the switch mechanism 50 and the sliding gear switching mechanism 60, and can accurately control the gas flow rate of steam, and the operation is convenient and simple.

[0059] Moreover, through the design of multiple limit stops at different heights, the air flow rate can be controlled to switch between different gears, and the locking function is realized when switching to the gear where the maximum air flow rate is zero.

[0060] Moreover, the moving direction of the valve core 41 is a straight line, the angle between the flow direction of the water pipe 20 and the moving direction of the valve core 41 is set at a preset angle, and the angle between the flow direction of the nozzle 30 and the moving direction of the valve core 41 is set at a preset angle, which is used to reduce the force of the airflow or water flow on the valve core 41 when it moves. When steam flows from the water pipe 20 into the inner cavity of the water valve 40 through the water inlet sleeve 43, due to the angle between the water inlet sleeve 43 and the moving direction of the valve core 41, part of the impact force exerted by the steam on the valve core 41 is offset by the wall of the water valve 40, and the valve core 41 is not easily pushed by the steam impact force. This design can improve the accuracy of steam gas flow control, and at the same time can avoid safety problems caused by the valve core 41 being opened or closed by mistake, thereby improving the safety and control accuracy of the spray gun.

[0061] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model shall be subject to the attached claims.

Claims

1. A multi-position handheld spray gun, comprising a housing, a water pipe, a nozzle and a water valve, for allowing steam to pass through the water pipe, the water valve and the nozzle in sequence before being sprayed out, characterized in that: The multi-speed handheld spray gun also includes a push switch mechanism and a sliding speed switching mechanism; The push switch mechanism includes a button, and the button is used to press the water valve to open the multi-position handheld spray gun; The sliding gear switching mechanism includes a sliding button and a sliding groove opened on the shell, the sliding groove is used for the sliding button to slide therein and be fixed at a preset gear position, the sliding button includes a plurality of limit stops of different heights, when the sliding button is at different preset gear positions, the button is located at different limit stops, and the limit stops are used to limit the stroke of the button to adjust the maximum air flow of the multi-speed handheld spray gun.

2. The multi-position handheld spray gun according to claim 1, characterized in that: The water valve includes a water inlet sleeve and a water outlet sleeve. The inlet of the water inlet sleeve is provided with a flange for guiding the water pipe to be sleeved onto the water inlet sleeve. The nozzle is detachably mounted on the water outlet sleeve. The water inlet sleeve and the water outlet sleeve are respectively used to connect the water pipe and the nozzle with the inner cavity of the water valve to form an air outlet channel.

3. The multi-position handheld spray gun according to claim 1, characterized in that: The water valve includes a valve core and a first elastic return member arranged in its inner cavity, a side of the valve core is provided with an extrusion block, and a matching block corresponding to the extrusion block is provided on the side of the inner cavity of the water valve, and the first elastic return member is used to provide a pre-tightening force so that the extrusion block squeezes the matching block to keep the multi-speed handheld spray gun closed. At this time, one end of the valve core away from the first elastic return member penetrates the water valve and extends out.

4. The multi-position handheld spray gun according to claim 3, characterized in that: The inner cavity of the water valve is divided into two chambers by the extrusion block and the matching block. The water pipe and the nozzle are respectively connected to different chambers. The air flow rate of the multi-speed handheld spray gun is determined by the opening between the extrusion block and the matching block. The button is used to apply pressure to the valve core to drive the extrusion block to move relative to the matching block to adjust the opening.

5. The multi-position handheld spray gun according to claim 4, characterized in that: The moving direction of the valve core is a straight line, the angle between the flow direction of the water pipe and the moving direction of the valve core is set at a preset angle, and the angle between the flow direction of the nozzle and the moving direction of the valve core is set at a preset angle, which is used to reduce the force of the air flow or water flow on the valve core when it moves.

6. The multi-position handheld spray gun according to claim 1, characterized in that: The water valve also includes a plug, which is detachably and separably mounted on the water valve and is used for inspecting the inner cavity of the water valve after disassembly.

7. The multi-position handheld spray gun according to claim 1, characterized in that: The button includes a first pressing portion and a second pressing portion. When the button is pressed, the first pressing portion applies pressure to the water valve and / or the second pressing portion applies pressure to the limit stop block.

8. The multi-position handheld spray gun according to claim 7, characterized in that: The button also includes a rotating shaft, through which the button is installed on the shell and when the button is pressed, the button rotates along the axis of the rotating shaft; the button is in an elongated shape, the second pressing portion and the rotating shaft are located at both ends of the button, and the first pressing portion is located in the middle of the button; the push switch mechanism also includes a second elastic reset member, which is installed between the water valve and the button, and the button has a tendency to stay away from the water valve through the elastic action of the second elastic reset member.

9. The multi-position handheld spray gun according to claim 1, characterized in that: The limit stop block includes a first limit stop block, the distance from the button to the first limit stop block is greater than the distance from the button to the water valve, and when the button hits the first limit stop block, the moving distance of the water valve reaches a maximum.

10. The multi-position handheld spray gun according to claim 9, characterized in that: The limit stop block also includes a second limit stop block, the distance from the button to the second limit stop block is smaller than the distance from the button to the water valve, and when the button hits the first limit stop block, the moving distance of the water valve is zero.

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