A sprayer

Abstract

This utility model relates to a sprayer for drawing in and spraying liquid from a container. The main body includes an inlet pipe and a nozzle, as well as a cylinder, piston, and wrench. The key feature is that an inlet valve is provided on the water outlet channel between the cylinder and the nozzle. This valve is configured to always close the flow path between the inlet pipe and the cylinder under pressure from the liquid within the cylinder. When the inlet valve is opened by the wrench, the liquid in the cylinder is sprayed out from the nozzle. A switching valve is also provided at the upper end of the inlet pipe. The switching valve includes at least two inverted liquid pumping ports, allowing the sprayer to operate in either an upright or inverted mode. The advantages of this utility model are: by installing the built-in switching valve, the sprayer can not only operate normally in both upright and inverted modes, but its detachable installation at the upper end of the inlet pipe also significantly reduces the damage rate during transportation. The inlet valve also accelerates the spraying speed and prevents liquid leakage.

Description

Technical Field

[0001] This utility model relates to the field of sprayer technology, and in particular to a pump sprayer that is manually operated by a trigger lever. Background Technology

[0002] A sprayer is a type of miniature sprayer. These products utilize the movement of a piston within a pump body, causing gas flow within the pump body, reducing its pressure, while the pressure outside the pump body remains constant. This pressure difference creates a pressure difference that guides the liquid out of the pump body. When the liquid encounters the high-speed airflow, it is instantly atomized. For example, a "hand-operated sprayer" with patent application number 202180087630.5 has a cap at the lower end of its base. This cap can be screwed onto the opening of a container. Therefore, by screwing the cap onto the container opening, the hand-operated sprayer is installed on the container. It should be noted that this installation method allows the base to rotate freely relative to the cap. The main reason for this is that when the cap is installed on the container opening, a flange formed at the lower end of the base is clamped between the cap and the container opening, thereby fixing the base to the container. In addition, the sprayer also uses a secondary valve structure that can generate a certain pre-pressure. Its piston part and the valve of the elastically deformable inverted dome-shaped dome spring part serve as a secondary valve (also known as an "outlet valve"). When the wrench is turned to the end and the pressurized state of the cylinder space is released by the spraying of liquid (or air in the initial state), the secondary valve pushes down the secondary valve piston part through the restoring force of the dome spring part, closing the flow path and preventing droplets from being generated from the nozzle part after the liquid is sprayed out.

[0003] However, this type of sprayer still has some shortcomings in actual use: First, although the base rotates freely relative to the lid, the flange at the lower end of the base is clamped between the lid and the mouth of the container, keeping the lid in a fixed state relative to the container, the sealing between the base and the lid is relatively weak because the base and the lid are usually sealed at the end face and can rotate relative to each other. Gaps may appear at the connection between the two, leading to liquid leakage. Secondly, when sprayers are stacked, such as during transportation, the base of some sprayers may be subjected to forces such as compression or counterclockwise rotation, causing the base to rotate and the cap to rotate. This can easily loosen the fit between the cap and the liquid container, resulting in the liquid inside the container flowing out from the opening and causing waste, making it difficult to meet the transportation needs of sprayers that have already contained liquid.

[0004] Third, because the piston part of the secondary valve (including the inner skirt) is directly pressurized by the liquid stored in the cylinder to a certain threshold and then pushed upward to open the flow path, and the inner skirt is relatively long in the vertical direction, and there is a need to set the compression and return space of the dome spring part, the longitudinal length of the secondary valve itself in the auxiliary cylinder part in the vertical direction is relatively long. After the liquid stored in the cylinder is pressurized to a smaller threshold, the flow path can be opened quickly. However, the time for the inner skirt to return downward to close the flow path using the dome spring part is relatively longer. On the one hand, there is still a risk of leakage from the nozzle part. On the other hand, the pre-compression force generated is small, which results in a larger actuation force required by the actuating wrench. Fourth, different usage scenarios also require that the sprayer not only be able to be used when the bottle is placed upright, but also needs to be able to spray liquid normally when the bottle is upside down. Therefore, further improvements are needed to this type of spray gun / sprayer. Summary of the Invention

[0005] The first technical problem to be solved by this utility model is to provide a sprayer that can prevent relative rotation between the spray body and the container, thereby avoiding liquid leakage, in light of the above-mentioned existing technology.

[0006] The second technical problem to be solved by this utility model is to provide a sprayer with a built-in inverting device in view of the above-mentioned existing technology.

[0007] The third technical problem to be solved by this utility model is to provide a sprayer that can discharge liquid at a greater speed, in view of the above-mentioned existing technology.

[0008] The technical solution adopted by this utility model to solve the first technical problem mentioned above is as follows: the sprayer, which can be used to draw in and spray out liquid in a container, includes: The main body of the spray gun is used to spray liquid; An attachment, located at the lower section of the spray gun body, is used to attach the spray gun body to the container; Its features are: It also includes a first connector, which has a flange portion that protrudes radially outward. When the spray gun body is attached to the container, the flange portion is clamped between the attachment and the periphery of the container opening, thereby fixing the first connector to the container. The flange portion is provided with a rotation area that allows the spray gun body to rotate freely relative to the attachment. Correspondingly, the first connector includes an insertion portion that can be inserted into the lower section of the spray gun body. The lower section of the spray gun body and / or the insertion portion both have at least two sealing members for sealing, which together form a seal on both sides of the rotational circumferential surface.

[0009] To solve the second technical problem, preferably, the spray gun body is provided with an inlet tube for introducing liquid into the container, and also includes: A piston is reciprocally disposed at the outer end of the cylinder section and is used to form a sealed inner cavity in the cylinder section. A wrench, located on one side of the piston, is used to push the piston toward the cylinder from front to back; The first valve structure is provided on the water outlet channel between the cylinder section and the nozzle section, and is configured to always close the flow path between the inlet pipe and the cylinder section under the pressure of the liquid in the cylinder section. The switching valve is jointly constructed on the first connector and the second connector that mates with the first connector. The second connector is located in the attachment of the container and includes a socket for insertion into the upper end of the inlet tube. The switching valve includes a first valve seat disposed on a first connector, a first valve ball, an inverted liquid pumping port formed in the first valve seat, and a water inlet chamber communicating with the rear of the cylinder. The switching valve is configured such that when the sprayer is in an upward upright position, the first valve ball closes the inverted liquid pumping port of the first valve seat, and when the sprayer is in a downward inverted position, the first valve ball opens the inverted liquid pumping port, thereby allowing liquid to flow from the container to the water inlet chamber, enabling the sprayer to operate in either an upright or inverted mode.

[0010] The applicant needs to explain that: the switching valve, through the design of the first and second connecting parts, enables the use of the inverted (USD) function with minimal modifications, simplifying the installation process and thus limiting the increase in product cost. Specifically, the design of integrating the switching valve structure into the first connecting part has three advantages: First, it reduces the internal structure of the spray gun body; second, when the sprayer is in an upright position, the first valve ball of the switching valve seals the first port on the first valve seat, preventing liquid from flowing to the first port during cylinder suction and thus reducing the amount of liquid flowing to the inlet chamber, effectively improving the liquid loading speed; third, the separate design of the second and first connecting parts meets the requirement of convenient installation. The built-in switching valve not only allows the sprayer to work normally in both upright and inverted modes, but the detachable installation of the switching valve on the upper end of the inlet pipe also significantly reduces the damage rate of the switching valve during transportation.

[0011] Furthermore, the first connector has a convex wall surrounding it to form an upper cylinder with the opening facing downward. The bottom periphery of the upper cylinder or the outer wall adjacent to its bottom has the flange portion. The flange portion is at least partially recessed downward to form a groove around which the spray gun body can rotate freely. The groove constitutes the rotation area. The second connector includes a lower cylinder, the bottom center of which has an inlet that communicates with the inlet pipe to allow liquid to flow in. The periphery of the inlet extends upward to form a first pipe and a second pipe arranged side by side and spaced apart, and a third pipe located between the two and extending downward. The inlet pipe is inserted into the third pipe, the first pipe is inserted into the first valve seat, and the second pipe is inserted into the first connector to form the water inlet chamber. The lower cylinder and the upper cylinder also form a connecting cavity, and the connecting cavity, the first valve seat, the water inlet chamber, and the inlet pipe are in fluid communication. The inverted liquid pumping port includes a first port located at the lower end of the first tube and a second port formed between the upper end of the first tube and the first valve seat. The bottom of the lower cylinder also has an inflow section for the liquid in the container to flow into the connecting cavity. When the sprayer is in the downward inverted position, the first valve ball opens the first port so that the liquid can flow from the connecting cavity through the second port and the first port to the water inlet chamber.

[0012] Similarly, the applicant needs to emphasize that, from the perspective of simple processing, the rotating area is preferably grooved. In addition, the second connector and the first connector are both cylindrical and are assembled to form a connecting cavity and a water inlet chamber, so that in the upright mode, the liquid can directly enter the water inlet chamber through the inlet pipe; or in the inverted mode, the first valve ball of the switching valve opens the first port on the first valve seat, and the liquid can directly enter the first valve seat through the connecting cavity through the inflow part. The first valve seat constitutes the "water outlet chamber" in the inverted mode and finally enters the water inlet chamber, thus realizing the inverted mode.

[0013] Furthermore, the groove includes a first groove wall located on the inner side and a second groove wall located on the outer side and sandwiched between the attachment and the periphery of the container opening. The first groove wall continues to extend upward in the direction of the top of the cylinder to form the insertion part. The sealing component is provided on both the inner and outer sides of the circumferential surface of the first groove wall. The first groove wall and the convex wall form an accommodating space for the lower section of the spray gun body to extend into. Correspondingly, the lower section of the spray gun body includes an inner convex ring that can extend into the accommodating space and an outer convex ring spaced apart from the inner convex ring. The outer convex ring has a lateral outward protrusion inserted into the groove at a corresponding position. A gap is left between the attachment and the lateral outward protrusion for free rotation. The outer convex ring and the inner convex ring form a seal on both sides of the circumferential surface of the first groove wall, respectively.

[0014] This groove serves a dual purpose: firstly, it allows the spray gun body to rotate freely; secondly, the first wall of the groove forms the "insertion part" where the connector is inserted into the lower section of the spray gun body. This effectively simplifies the mold design that would otherwise require separate machining of both components, while also achieving a compact connection between the entire spray gun body and the connector. Furthermore, the peripheral wall of the inner convex ring also needs to be equipped with a sealing structure compatible with the sealing components, such as a sealing groove, to form a double seal with the two sides (also known as the peripheral surface) that contact the insertion part. This not only simplifies the structure but also improves reliability; otherwise, the spray gun body may rotate, causing the connector to rotate as well, ultimately leading to leakage.

[0015] The applicant also needs to emphasize that a gap must be left between the attachment and the lateral outward protrusion to allow for free rotation. This gap ensures that there is sufficient space for the attachment to rotate freely; otherwise, the attachment may rotate along with the spray gun body when it rotates, ultimately leading to leakage.

[0016] To achieve a sealed connection between the second connector and the first connector, from a structural optimization perspective, the lower cylinder preferably includes a fourth convex ring located around the first and second tubes. The fourth convex ring extends outward to a support platform for the convex wall of the upper cylinder and the first groove wall to rest together. The fourth convex ring is sealed to the convex wall of the upper cylinder. The inner convex ring also has a replenishment channel for supplying outside air to the container via the spray body. Correspondingly, a flow channel communicating with the replenishment channel is provided on the support platform. The fourth convex ring achieves a sealed connection with the convex wall of the upper cylinder. Simultaneously, the replenishment channel, which allows outside air to be supplied to the container when the sprayer is not activated, is cleverly integrated into the inner convex ring. In upright mode, outside air can be directly supplied to the container from the replenishment channel via the flow channel. Since the replenishment channel is an axial replenishment groove that communicates with the circumferential sealing groove of the inner convex ring, it also avoids the need for a separate valve ball to close the replenishment port within the small space of the lower cylinder.

[0017] To solve the third technical problem, preferably, the pre-compression structure is provided on the water outlet channel between the cylinder section and the nozzle section. The pre-compression structure includes a second valve seat and a valve. The second valve seat and the spray gun body are engaged to hold the valve in an appropriate position, that is, upstream of the nozzle section. The outer periphery of the valve abuts against the spray gun body and / or the second valve seat and forms a pre-compression chamber. The valve includes a sealing part, which can force the sealing part to be displaced to open the water outlet channel communicating with the nozzle when the liquid generates sufficient fluid pressure in the lower chamber. The sealing part divides the pre-compression chamber into a relatively independent upper chamber and a lower chamber. Correspondingly, the second valve seat is provided with an action part adapted to the sealing part. The action part is housed in the upper chamber and can prevent the sealing part from continuing to flex or move, and limit the liquid flow path through the lower chamber.

[0018] Regarding the pre-compression structure, the applicant should explain that: 1. The pre-compression chamber is divided into two relatively independent upper and lower chambers by the valve's sealing part. This allows pressure to accumulate in the smaller lower chamber before being ejected from the nozzle, forcing the sealing part to shift in a shorter time and accelerating the liquid ejection to achieve the desired faster spraying effect; 2. Simultaneously, the action part of the second valve seat acting on the sealing part is located in the upper chamber, effectively reducing the longitudinal length of the valve itself in the pre-compression chamber. After the liquid stored in the cylinder is pressurized to a smaller threshold, the flow path can be quickly opened, and the sealing part is pulled back to its initial position using its own elastic properties or characteristics. This achieves a "fast opening and fast closing" effect within the smaller "lower chamber" pressure storage space, enabling the sprayer to accelerate the spraying speed and prevent liquid from dripping from the nozzle.

[0019] To further generate the expected "pre-compression and energy storage" effect, preferably, an inner periphery is also provided at intervals within the outer periphery of the valve. The inner periphery is thicker than the outer periphery and abuts against the spray gun body. The inner periphery divides the internal space of the lower chamber into a first chamber and a second chamber from the center to the outside. A water passage is provided at the bottom of the inner periphery. After the liquid flows into the first chamber, it flows through the water passage to the second chamber, and the outer periphery is kept sealed by the surface tension of the liquid. The purpose of this arrangement is that, in order to further increase the pre-pressure of the lower chamber, the applicant further reduces the size of the chamber by means of the inner periphery. In addition to its "dividing" function, the inner periphery is required to be thicker than the outer periphery wall, which can also further play a role in pressure storage. At the same time, the water passage at its bottom allows the liquid to flow through the water passage to the second chamber, and its incompressibility allows the outer periphery to be kept sealed, increasing the reliability of the pre-compression structure.

[0020] Furthermore, the water outlet channel between the cylinder section and the nozzle section includes a first flow path connecting the cylinder section and the lower chamber, and a second flow path connecting the lower chamber and the nozzle section. The first flow path is located outside the second flow path, and the outlet of the first flow path is lower than the inlet of the second flow path, so that after the liquid flows through the first flow path to the pre-compression chamber, it forms at least a partially inverted flow path before entering the inlet of the second flow path. The applicant also needs to emphasize the special design of the water outlet channel, which is divided into a "nested" first flow path and a second flow path. Unlike the inverted "L" shape of the water outlet channel between the cylinder and the nozzle in the existing patent, the liquid in this application is pressurized by rotating the wrench, causing the piston to move backward. This pressurizes the liquid in the cylinder and causes the liquid to enter the first flow path located on the periphery. This allows the pressure to be accumulated in the lower chamber before being ejected from the nozzle. When the pressure accumulates to a preset threshold, it can force the sealing part to shift and accelerate the ejection of the liquid. In order for the sealing part to be pulled back to its initial position using its own elastic properties or features, a specific height difference must be maintained between the sealing part and the outlet of the first flow path where the liquid enters the lower chamber, thereby achieving the effect of "quick opening and quick closing".

[0021] Furthermore, the pre-compression structure is disposed on the top of the spray gun body, the top of which has an upwardly extending upper circumference. The second valve seat is a cylindrical shape with its opening facing downwards. The second valve seat and the upper circumference are aligned and sealed together. The first flow path is formed by a vertical tube perpendicular to the axis of the cylinder or the water outlet channel. The spray gun body has a circumferential wall around the vertical tube, which together form the second flow path. The circumferential wall has at least a partial platform for installing the valve. While the outer circumference of the valve is sealed to the upper circumference, the sealing part is held on the top edge of the vertical tube. Of course, the pre-compression structure can also be directly disposed at the rear end of the cylinder.

[0022] In order for the pre-compression structure to produce the expected "pre-compression storage" effect, the ratio of the size of the lower chamber to the cylinder chamber needs to be between 1:4 and 1:6. The cylinder is in fluid communication with the container's inlet pipe and is used to store liquid. The vertical height H of the sealing part from the spray gun body is between 1 mm and 1.4 mm.

[0023] The applicant needs to clarify that the lower chamber is crucial for allowing pressure accumulation or pre-compression of fluids such as liquids or air. The greater the pre-pressure required by the sprayer, the smaller the ratio of its chamber size needs to be. If the ratio of the chamber size is too large, it can easily cause problems with the spray gun body not being able to receive liquid. Therefore, it is preferable to be between 1:4 and 1:6. As mentioned above, the limitation range of this vertical height H is a decisive factor in maintaining the pressure accumulation or pre-compression of fluids such as liquids or air. The valve body can be made of elastomer, flexible material, plastic material, polyurethane material, silicone material, etc. It utilizes its own sealing part to have the ability to flex, move, or deform when a certain amount of force is applied. Its material can be selected according to the required discharge force. Since the sealing part is only pulled back to the initial position by its own elastic properties or characteristics, the problem of "fast opening and slow closing" in the prior art is avoided, and the effect of "fast opening and fast closing" is achieved. When the vertical height H of the sealing part from the spray gun body is between 1 mm and 1.4 mm, the ratio of the lower chamber to the cylinder chamber size can be between 1:4 and 1:6.

[0024] Compared with the prior art, the advantages of this utility model are: the flange portion of the sprayer's connecting part has a dual function: Firstly, it is used to clamp between the attachment and the periphery of the container's opening, thereby securing the connector to the container; Secondly, the flange is provided with a rotating area that allows the spray gun body to rotate freely relative to the attachment. By utilizing the design of the flange and the rotating area in the connector, a static end face seal can be formed on the one hand, and the liquid leakage problem during rotation caused by only end face seal can be avoided on the other hand. This prevents liquid from leaking from the connection between the spray body and the attachment, and also facilitates the overall installation of the sprayer. Third, the pressure is allowed to accumulate using the pre-compression structure before being ejected from the nozzle, which can force the seal to shift in a shorter time and accelerate the ejection of the liquid to achieve the desired faster ejection effect. Fourth, by installing a built-in switching valve, the sprayer can not only work normally in both upright and inverted modes, but the switching valve can also be detachably installed on the upper end of the inlet pipe, thereby significantly reducing the damage rate of the switching valve during transportation. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the sprayer in Embodiment 1 of this utility model; Figure 2 This is a partially enlarged schematic diagram of the pre-compression structure in the sprayer of Embodiment 1 of this utility model (without the second connecting member); Figure 3This is a partially enlarged structural diagram of the water outlet channel in the sprayer in Embodiment 1 of this utility model (without the second connecting member); Figure 4 This is a partially enlarged structural diagram of the connection area between the sprayer body and the first connector in Embodiment 1 of this utility model; Figure 5 This is a schematic diagram of the structure of the first connecting member in Embodiment 1 of this utility model; Figure 6 This is a cross-sectional view of the attachment in Embodiment 1 of this utility model; Figure 7 This is a schematic diagram of the liquid inlet state when the sprayer is in an upright position according to Embodiment 1 of this utility model; Figure 8 This is a schematic diagram of the spraying state when the sprayer is in an upright position according to Embodiment 1 of this utility model; Figure 9 This is an exploded view of the sprayer in Embodiment 1 of this utility model; Figure 10 This is a structural schematic diagram of the second connector at one angle in Embodiment 1 of this utility model; Figure 11 This is a structural schematic diagram of the second connector from another angle in Embodiment 1 of this utility model; Figure 12 This is a schematic diagram showing the disassembled state of the spray gun body and the first connecting member in Embodiment 1 of this utility model; Figure 13 This is a schematic diagram of the sprayer in the liquid inlet state when it is in an upright position in Embodiment 1 of this utility model (equipped with a second connecting member); Figure 14 This is a schematic diagram of the spraying state when the sprayer is in an upright position in Embodiment 1 of this utility model (with a second connecting member). Figure 15 This is a schematic diagram of the liquid inlet state when the sprayer is in the inverted position in Embodiment 1 of this utility model (equipped with a second connecting member); Figure 16 This is a schematic diagram of the spraying state when the sprayer is in the inverted position in Embodiment 1 of this utility model (with a second connecting member). Figure 17 This is a schematic diagram of the sprayer in the liquid inlet state when it is in an upright position in Embodiment 2 of this utility model (equipped with a second connecting member); Figure 18 This is a schematic diagram of the spraying state when the sprayer is in an upright position in Embodiment 2 of this utility model (equipped with a second connecting member); Figure 19 This is a schematic diagram of the liquid inlet state when the sprayer is in the inverted position in Embodiment 2 of this utility model (equipped with a second connecting member); Figure 20 This is a schematic diagram of the spraying state when the sprayer is in the inverted position in Embodiment 2 of this utility model (equipped with a second connecting member); Figure 21 This is a schematic diagram of the structure of the sprayer in Embodiment 3 of this utility model (the first connecting member is located inside the attachment member); Figure 22 This is an exploded view of the sprayer in Embodiment 3 of this utility model (without the second connecting member); Figure 23 This is a detailed structural diagram of the pre-compression structure in the sprayer of Embodiment 3 of this utility model; Figure 24 This is a schematic diagram of the sprayer in the upright position with liquid inlet in Embodiment 3 of this utility model (without the second connecting member); Figure 25 This is a schematic diagram of the sprayer in the state of being actuated and replenished with air in Embodiment 3 of this utility model. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to specific embodiments. Example

[0027] like Figures 1-16 The present invention is shown as the preferred embodiment.

[0028] The structure and function of the sprayer will be further explained below.

[0029] Figure 2 and 3 This is a side sectional view of the sprayer.

[0030] The sprayer of this utility model has the following functions: when installed on a container (not shown), and with the cylinder A4 filled with liquid, the piston A2 is moved to the right side of the figure by rotating the wrench A3, pressurizing the liquid in the cylinder A4 (at this time, the valve 72 structure is open), causing the liquid to be sprayed out from the nozzle. In order to meet the user's needs, the nozzle can spray, spray water, or be closed. Therefore, a connector is provided on the nozzle. By adjusting the rotation angle of the connector relative to the nozzle, the nozzle can be in at least one of the following spray states: spraying or closed. Alternatively, in the direction of liquid spraying, the nozzle has a mesh structure downstream of the spray nozzle that can convert the spray state into a foam state. This mesh structure can also enable the nozzle to spray foam.

[0031] Conversely, by resetting the rotation of the wrench A3, the piston A2 moves upstream (to the left in the figure), creating negative pressure in the cylinder A4, thereby filling the cylinder A4 with liquid from the container (at this time, the valve 72 structure is closed).

[0032] Furthermore, by simply installing a valve 72 structure in the fluid passage between the cylinder section A4 and the inlet pipe A1, it is sufficient to prevent the liquid entering the cylinder section A4 from flowing back into the container.

[0033] Structurally, the sprayer is used to draw in and spray liquid from a container, and includes: a spray gun body A, an inlet pipe A1, and an attachment B, which is basically a cap with the opening facing downwards. The spray gun body A includes: a nozzle section, a cylinder section A4, a piston A2, a wrench A3, a first elastic member for resetting, and a first valve structure A5. Specifically, the spray gun body A is provided with an inlet pipe A1 for introducing liquid into the container and a nozzle section for spraying liquid. It also includes a cylinder section A4 that is in fluid communication with the inlet pipe A1 and stores liquid; a piston A2 that is reciprocally movable at the outer end of the cylinder section A4 and forms a sealed inner cavity in the cylinder section A4; and a wrench A3 located on one side of the piston A2. The wrench A3 is used to push the piston A2 into the cylinder section A4, and the first elastic member is connected to the wrench A3 for resetting. Furthermore, the sprayer also includes a cover that covers the cylinder section A4 and the body.

[0034] In addition to the first valve structure A5, a pre-compression structure 7 is also provided on the water outlet channel 2 between the cylinder section A4 and the nozzle section. This pre-compression structure 7 can not only prevent liquid from leaking outward and avoid liquid backflow, but also enable the user to generate a greater speed to discharge liquid with a smaller actuating wrench A3.

[0035] The following section will mainly describe the pre-compression structure 7 that constitutes the sprayer.

[0036] refer to Figures 3-7 The pre-compression structure 7 of the sprayer includes a second valve seat 71 and a valve 72. In a simpler way, the second valve seat 71, which is a cylindrical shape with its opening facing downward, is engaged with the sprayer body A to hold the valve 72 in the proper position, that is, upstream of the nozzle. A simpler way to make the outer periphery 72a of the valve 72 is to directly abut against the spray gun body A and form a pre-compression chamber 73. The valve 72 includes a sealing part 13. When the liquid generates sufficient fluid pressure in the lower chamber 75, it can force the sealing part 13 to be displaced to open the water outlet channel 2 connected to the nozzle. The sealing part 13 divides the pre-compression chamber 73 into a relatively independent upper chamber 74 and a lower chamber 75. By using the sealing part 13 of the valve 72 to divide the pre-compression chamber 73 into two relatively independent upper chambers 74 and lower chambers 75, the pressure is allowed to accumulate in the smaller lower chamber 75 before being sprayed from the nozzle. This allows the sealing part 13 to be displaced in a shorter time, thereby accelerating the spraying of the liquid and achieving the desired faster spraying effect. Correspondingly, the second valve seat 71 is provided with an action part 76 adapted to the sealing part 13. The action part 76 is housed in the upper chamber 74 and can prevent the sealing part 13 from continuing to flex or move, and limit the liquid flow path through the lower chamber 75. By placing the action part 76 of the second valve seat 71 acting on the sealing part 13 in the upper chamber 74, the longitudinal length of the valve 72 itself in the vertical direction in the pre-compression chamber 73 can be effectively reduced. After the liquid stored in the cylinder part A4 is pressurized to a small threshold, the flow path can be quickly opened, and the sealing part 13 is pulled back to the initial position by its own elastic properties or characteristics. The "quick opening and quick closing" effect is achieved in the small "lower chamber 75" pressure storage space, so that the sprayer can accelerate the spraying speed and prevent liquid from dripping from the nozzle part.

[0037] Its specific structure is as follows: like Figure 2 and 3As shown, in order for the pre-compression structure 7 to produce the expected "pre-pressure storage" effect, the ratio of the size of the lower chamber 75 to the chamber size of the cylinder A4 is 1:5. It should be noted that the lower chamber 75 is crucial for allowing pressure accumulation or pre-compression of fluids such as liquids or air. The greater the pre-pressure required by the sprayer, the smaller the ratio of its chamber size needs to be. If the ratio is too large, it can easily cause problems with liquid application to the spray gun body A. Meanwhile, the vertical height H of the sealing part 13 from the spray gun body A is approximately 1.2 mm. The vertical height H of the sealing part 13 from the spray gun body A directly determines the size of the lower chamber 75. As mentioned above, the limitation of this vertical height H is a decisive factor in maintaining the pressure accumulation or pre-compression of the fluid, such as liquid or air. The valve 72 as a whole can be made of an elastomeric material, which utilizes its sealing part 13 to flex, move, or deform when a certain amount of force is applied. Its material can also be selected according to the required discharge force. Since the sealing part 13 is pulled back to its initial position only by utilizing its own elastic properties or characteristics, the problem of "fast opening and slow closing" in the prior art is avoided, and the effect of "fast opening and fast closing" is achieved. At the same time, the sealing part 13 also needs to have a preset thickness Th, and Th=0.8mm, which is horizontal relative to the vertical pipe body. The preset thickness of the sealing part 13 is determined by the required resistance or minimum opening pressure for the sealing part 13 to be displaced to open the water outlet channel 2. In this embodiment, a thicker part is selected, so that the preset thickness can, to a certain extent, help generate sufficient fluid pressure in the lower chamber 75.

[0038] Furthermore, to further generate the expected "pre-pressure storage" effect, an inner periphery 72b is also provided at intervals within the outer periphery 72a of the valve 72. The inner periphery 72b is thicker than the outer periphery 72a and abuts against the spray gun body A. The inner periphery 72b divides the internal space of the lower chamber 75 from the center to the outside into a first chamber 77 and a second chamber 78. A water passage 721b is provided at the bottom of the inner periphery 72b. After the liquid flows into the first chamber 77, it flows through the water passage to the second chamber 78, and the outer periphery 72a is kept in a sealed state by means of the liquid tension. The inner periphery 72b further reduces the size of the chamber. In addition to its "dividing" function, the inner periphery 72b is required to be thicker than the outer periphery wall, which can further enhance the pressure storage function. At the same time, the water passage 721b is provided at its bottom, so that when the liquid flows through the water passage 721b to the second chamber 78, its tension keeps the outer periphery 72a in a sealed state. Due to the design of the first chamber 77, the water outlet channel 2 itself also has a special design. Unlike the inverted "L" shape of the water outlet channel 2 between the cylinder A4 and the nozzle in the existing patent, the water outlet channel 2 in this embodiment is divided into a "nested" first flow path 21 and a second flow path 22. The first flow path 21 connects the cylinder A4 and the lower chamber 75, while the second flow path 22 connects the lower chamber 75 and the nozzle. When the wrench A3 is actuated, the piston A2 moves to the rear and pressurizes the liquid in the cylinder A4, so that the liquid first enters the first flow path 21 located on the periphery. This allows the pressure to be accumulated in the first chamber 77 before being sprayed from the nozzle. When the pressure accumulates to a preset threshold, it can force the sealing part 13 to shift (in this embodiment, shifting means "at least partially bending upward") and accelerate the spraying of the liquid.

[0039] Finally, to better install the pre-compression structure 7, in this embodiment, the pre-compression structure 7 is set on the top of the spray gun body A. The top of the spray gun body A has an upwardly extending upper circumferential edge 8, and the second valve seat 71 is closed and sealed to the upper circumferential edge 8. The first flow path 21 is formed by a vertical tube perpendicular to the axial direction of the cylinder part A4 or the water outlet channel 2. The spray gun body A has a circumferential wall around the vertical tube, which together form the second flow path 22. While the outer circumferential edge 72a of the valve 72 is sealed to the upper circumferential edge 8, the sealing part 13 is held on the top edge of the vertical tube. The working part 76 of the second valve seat 71 is a protruding post that is parallel to the axial direction of the vertical tube and protrudes downward. The lower end face of the protruding post can contact the sealing part 13 when in action, so that the continued deflection or movement of the sealing part 13 is prevented, and the fluid flow channel through the lower chamber 75 is fixed. When the pressure applied to valve 72 decreases, the sealing part 13 of valve 72 can return to the unacted position, thereby preventing the flow of liquid through valve 72.

[0040] In addition to the aforementioned pre-pressurization and energy storage function, the applicant's main focus is on how to prevent liquid leakage when the spray body and the container rotate relative to each other.

[0041] Specifically, in terms of structure, an attachment B for attaching the spray gun body A to a container is provided in the lower section. Importantly, it also includes a first connector 1. The first connector 1 has a flange portion 11 that protrudes radially outward. When the spray gun body A is attached to the container, the flange portion 11 is sandwiched between the attachment B and the periphery of the container's opening, thereby fixing the first connector 1 to the container. The flange portion 11 has a rotating area 12 that allows the spray gun body A to rotate freely relative to the attachment B. From a manufacturing simplicity perspective, the rotating area 12 is preferably formed by a cylindrical body with a downward-facing opening, surrounded by a convex wall 10 around the periphery of the first connector 1. The outer wall of the cylindrical body near its bottom has a flange portion 11, which is at least partially recessed downward to form a groove around which the spray gun body A can rotate freely. This groove constitutes the rotating area 12.

[0042] In addition, the first connector 1 also includes an insertion part that can be inserted into the lower section of the spray gun body A. Both the lower section of the spray gun body A and the insertion part have at least two sealing members 130 for sealing, and the two together form a seal on both sides of the rotating circumferential surface. The applicant needs to explain that: since the first connector 1 is inserted into the insertion part of the lower section of the spray gun body A, the flange 11 of the first connector 1 is sandwiched between the attachment B and the periphery of the container opening. That is, the flange 11 of the first connector 1, the attachment B, and the periphery of the container opening constitute a fixed "whole". In fact, only the lower section of the spray gun body A can rotate freely in the circumferential direction relative to the insertion part. For this reason, a double seal is formed on the two sides (also called the local circumferential surface) that contact the insertion part, which can ensure that the gap 62 that causes liquid leakage will not appear when the spray gun body A rotates. As shown in the figure, the groove in this embodiment includes a first groove wall 14 located on the inner side and a second groove wall 15 located on the outer side and sandwiched between the attachment B and the periphery of the container opening. The first groove wall 14 continues to extend upward in the direction of the top of the cylinder to form an insertion part. Sealing parts 130 are provided on both the inner and outer sides of the periphery of the first groove wall 14. In order to facilitate installation and processing, the sealing part 130 can be set as an independently installed component such as a sealing ring or sealing ring, depending on actual needs. To achieve a seal on both sides of the rotating circumferential surface between the lower section of the spray gun body A and the insertion part, a simpler structural implementation is as follows: the first groove wall 14 and the convex wall 10 form an accommodating space 16 into which the lower section of the spray gun body A extends. Correspondingly, the lower section of the spray gun body A includes an inner convex ring 5 that can extend into the accommodating space 16 and an outer convex ring 6 spaced apart from the inner convex ring 5. The outer convex ring 6 has a laterally outward protrusion 61 inserted into the groove at a corresponding position. A gap 62 is left between the attachment B and the laterally outward protrusion 61 to allow it to rotate freely. Figure 4 As shown, the inner convex ring 5 contacts the outer circumference of the rotating surface relative to the first groove wall 14, while the outer convex ring 6 contacts the inner circumference of the rotating surface relative to the first groove wall 14. Therefore, the inner convex ring 5 needs to be provided with a sealing structure, such as a sealing groove, on its outer circumference and the outer convex ring 6 needs to be provided with a sealing structure that matches the sealing part 130 on its inner circumference. This arrangement enables point contact sealing on both the inner and outer sides of the rotating surface of the first groove wall 14. Since the first groove wall 14 will be squeezed to a certain extent when inserted between the inner convex ring 5 and the outer convex ring 6, the sealing strength will be further enhanced. The structure is not only relatively simple, but also more reliable.

[0043] In addition to the aforementioned two-sided sealing, another important point to note is the gap 62: this gap 62 ensures that there is enough space for the attachment B and the lateral outward protrusion 61 to rotate freely; otherwise, the spray gun body A may rotate, causing the attachment B to rotate as well, ultimately leading to leakage. The formation of this gap is mainly due to the structural improvement of the attachment B. As mentioned above, in order to form a two-sided seal, the first connector 1 and the spray body need to make structural improvements to themselves, and the attachment B also has corresponding structural improvements. Specifically, the attachment B is in the shape of a cap with the opening facing downward. The attachment B includes a peripheral wall that screws into the container and a mating part 9 located at the upper edge of the peripheral wall for clamping the second groove wall 15 with the container. The inner wall of the mating part 9 has an annular inner step 91, wherein the top end face of the second groove wall 15 maintains a static sealing fit with the first wall surface 911 below the annular inner step 91. Since the flange 11 of the first connector 1, the attachment B, and the periphery of the container opening constitute a "whole" that is fixed relative to the spray body, the structure of the attachment B must necessarily have a structure that seals with the top end face of the second tank wall 15. For example, an annular inner step 91 can be added to the structure, which uses the first wall surface 911 below the annular inner step 91 to form an end face seal with the second tank wall 15 to prevent leakage. In addition, the second wall surface 912 above the annular inner step 91 also needs to be provided with a limiting part 92, which can prevent the lower section of the spray gun body A from coming out of the rotation area 12 when it rotates freely relative to the attachment B. As mentioned above, compared to existing attachments B, besides sharing a common requirement of clamping the flange 11 at the lower end of the spray body between it and the container opening, it also has an important structural feature: the limiting part 92. This limiting part 92 only needs to prevent the lower section of the spray gun body A, which is pressed into the groove, from coming out of the groove. The two do not need to form an end face seal. Instead, a gap 62 is needed to allow the lower section of the spray gun body A to rotate, so as to truly prevent the spray gun body A from driving the attachment B to rotate. Finally, in order to leave a gap 62 for the lower section of the spray gun body A to rotate, the structure of the limiting part 92 includes a base end 93 integrally connected to the second wall surface 912 above the annular inner step 91 and a free end 94 that gradually slopes downward from the outside to the inside of the base end 93. The free end 94 continues to extend downward to form an extension end 95, and the extension end 95 leaves a gap 62 with the lateral outward protrusion 61.

[0044] In addition to solving the problem of maintaining a seal on both sides of the rotating circumference of the spray gun body A while allowing it to rotate freely relative to the attachment B, another key issue needs to be addressed: even if the sprayer can be used in both upright and inverted positions. To address this issue, the applicant's proposed solution remains integrated onto the first connector 1. If it needs to be used in an inverted position, a switching valve 3 needs to be constructed. This switching valve 3 is jointly constructed onto the first connector 1 and the second connector 4, which is connected to the first connector 1. The second connector 4 is located in the attachment B of the container and includes a socket for inserting the upper end of the inlet tube A1. The switching valve 3 includes a first valve seat 31, a first valve ball 32, an inverted liquid pumping port 310 formed in the first valve seat 31, and a water inlet chamber 33 communicating with the rear of the cylinder section A4, all disposed on the first connector 1. The switching valve 3 is configured such that when the sprayer is in an upward upright position, the first valve ball 32 closes the inverted liquid pumping port 310 of the first valve seat 31, and when the sprayer is in a downward inverted position, the first valve ball 32 opens the inverted liquid pumping port 310, thereby allowing liquid to flow from the container to the water inlet chamber 33, enabling the sprayer to operate in either an upright or inverted mode.

[0045] For the specific structure of the second connector 4, please refer to... Figure 10 and 11As shown, the device includes a lower cylinder with an inlet 41 at the center of its bottom, which communicates with an inlet pipe A1 for liquid inflow. The periphery of the inlet 41 extends upward to form a first pipe 42 and a second pipe 43 arranged side-by-side and spaced apart, and a third pipe 44 located between them and extending downward. The inlet pipe A1 is inserted into the third pipe 44. The first pipe 42 is inserted into a first valve seat 31, the second pipe 43 is inserted into a first connector 1 and forms an inlet chamber 33, and the third pipe 44 forms a socket. The lower and upper cylinders also form a connecting cavity 45 when closed together. The connecting cavity 45, the first valve seat 31, the water inlet chamber 33, and the inlet pipe A1 are in fluid communication. The inverted liquid pumping port includes a first port 34 located at the lower end of the first pipe body 42 and a second port 35 formed between the upper end of the first pipe body 42 and the first valve seat 31. The bottom of the lower cylinder is also directly provided with an inlet section 40 for the liquid in the container to flow into the connecting cavity 45. When the sprayer is in the downward inverted position, the first valve ball 32 opens the first port 34 so that the liquid can flow from the connecting cavity 45 through the second port 35 and the first port 34 to the water inlet chamber 33. In addition, the lower cylinder also includes a fourth convex ring 46 located around the first tube 42 and the second tube 43. The fourth convex ring 46 extends outward to a support platform 47 for the upper cylinder's convex wall 10 and the first groove wall 14 to rest together. The fourth convex ring 46 is sealed to the upper cylinder's convex wall 10. The inner convex ring 5 is also provided with a replenishment channel 51 for supplying outside air to the container via the spray body. Correspondingly, the support platform 47 has a flow channel 48 communicating with the replenishment channel 51. Considering that gas needs to be replenished into the container to balance the air pressure during the use of the sprayer, such as... Figure 16 As shown, in this embodiment, the air supply channel 51 for replenishing external air into the container is cleverly integrated into the inner convex ring 5, specifically as an axial air supply groove that communicates with the sealing groove circumferentially provided in the inner convex ring 5.

[0046] The structural design of the first connector 1 and the second connector 4 engaging is an effective way to enable the USD function with minimal modifications. In summary, the sprayer of this application is described as follows: In summary, the spraying process of this sprayer is as follows: First, the user can select the nozzle with a mesh structure according to whether foam needs to be generated. Then, according to the usage requirements, the user can select the indicator icon corresponding to the connector on the nozzle to spray or turn off. After adjusting the rotation angle of the connector, when the wrench A3 is pressed to add liquid, the outer skirt of the first valve structure A5 is forced open, thereby opening the outlet end of the third flow path from the inlet pipe A1 to the cylinder A4. The reduced pressure generated in the cylinder A4 is used as power to drive the liquid from the fluid-connected container into the cylinder A4 to reach the metered amount. The liquid in the cylinder A4 instantly blocks the outlet end of the third flow path, which can effectively seal the outlet end of the third flow path and prevent the liquid from flowing back towards the container. Pressing the wrench A3 again, due to the incompressibility of the liquid, forces the piston A2 of the valve 72 structure to move downstream (to the right in the figure) while the wrench A3 is pressed. This causes the first elastic element to deform and store energy. The liquid flows from the cylinder A4 to the first flow path 21 through the water inlet of the pre-compression structure 7 near the inner wall of the cylinder A4. Furthermore, taking advantage of the smaller vertical height H of the sealing part 13 from the spray gun body A, its greater thickness, and the greater thickness of its inner periphery 72b, pressure is allowed to accumulate rapidly as the liquid flows into the first chamber 77. When the pressure accumulates to a preset threshold, it forces the sealing part 13 to bend upwards, opening the inlet 41 of the second flow path 22. The lower end face of the protrusion can contact the sealing part 13 during operation, preventing further bending of the sealing part 13 and fixing the fluid flow channel through the lower chamber 75. After the liquid flows through the first flow path 21 to the first chamber 77, it forms an inverted "L" flow path and enters the inlet 41 of the second flow path 22, thus accelerating the liquid out. The liquid in the cylinder A4 instantly presses against the flow path corresponding to the inlet pipe A1, preventing the liquid from flowing back towards the container (e.g. Figure 14 As shown), at this time, the outside air is connected to the container through the air inlet to achieve air pressure balance; when the wrench A3 is stopped, the wrench A3 is reset under the reset action of the first elastic element. At this time, the piston A2 body can return to the original position, and the sealing part 13 of the valve 72 can return to the unacted position, thereby preventing the liquid from flowing through the valve 72, and the liquid in the container is refilled into the cylinder part A4 (at this time, the corresponding outer skirt in the first valve structure A5 opens). If the user needs to spray in an inverted mode, simply align the second connector 4 with the first connector 1 and insert the inlet tube A1 onto the third tube 44. Unlike the upright mode, the flow path differs. Pressing the wrench A3 initiates liquid flow. The liquid inlet process in the cylinder A4 is as follows: the first valve ball 32 opens, and liquid flows in from the inlet 40 at the bottom of the lower cylinder. The liquid flows from the connecting cavity 45 through the second port 35 and the first port 34 to the water inlet chamber 33, and then enters the inner cavity of the cylinder A4. In this way, continuous actuation draws liquid from the water inlet chamber 33. When liquid enters cylinder A4, whether in an inverted or upright position, once cylinder A4 is filled with liquid, further kinetic energy pushes the liquid into the second flow channel and stores force through the pre-compression structure 7. The process of pressing the lever A3 again to spray the liquid is the same as when the sprayer is in the upright position. At this time, outside air is connected to the container through the air supply channel 51 to achieve air pressure balance. When pressing the lever A3 stops, lever A3 resets under the action of the first elastic element, such as the plastic spring located outside cylinder A4. At this time, piston A2 returns to its original position. Figure 15 and 16 As shown. Example

[0047] like Figures 17-20 As shown, the structure is basically the same as that of the embodiment, the only difference being that: the sealing part 13 is an arc shape with the opening facing upwards, its preset thickness Th=0.6mm, and it has a "nipple-like" protrusion 220 in the center to block the second flow path 22. The spray gun body A has at least a partial platform 720 for installing the valve 72 on a circumferential wall around the vertical tube. The valve 72 according to several different embodiments of the present invention can be made of any desired material. The valve 72 can be formed of an elastic material or a material that can deform and return to a non-deformed state, or it can be formed of olefin-based polymers, silicon, other polymer materials or plastic materials. Of course, the size of the lower chamber 75 corresponding to the valve 72, the thickness of the sealing part 13, and the vertical height relative to the spray gun body A can also be adaptively selected according to the pre-pressure to be generated by the pre-compression structure 7. Figures 17-20 This diagram shows the sprayer in both upright and inverted modes. The arrows in the diagram indicate the liquid flow path and the air supply path. Example

[0048] like Figures 21-25 As shown, the structure is basically the same as that of Embodiment 2, the only difference being that the user disassembled the second connector 4 according to their own needs, so that it only retains the upright spray mode, as shown. Figure 25 As shown, after wrench A3 is pressed, outside air is connected to the container through the air supply channel 51 to achieve air pressure balance.

Claims

1. A sprayer capable of drawing in and spraying liquid from a container, comprising: The spray gun body (A) is used to spray liquid; An attachment (B) is provided on the lower section of the spray gun body (A) for attaching the spray gun body (A) to the container; Its features are: It also includes a first connector (1), which has a flange (11) that protrudes radially outward. When the spray gun body (A) is attached to the container, the flange (11) is sandwiched between the attachment (B) and the periphery of the container opening, thereby fixing the first connector (1) to the container. The flange (11) is provided with a rotating area (12) that allows the spray gun body (A) to rotate freely relative to the attachment (B). Correspondingly, the first connector (1) includes an insertion part that can be inserted into the lower section of the spray gun body (A). The lower section of the spray gun body (A) and / or the insertion part both have at least two sealing members (130) for sealing, which together form a seal on both sides of the rotating circumferential surface.

2. The sprayer according to claim 1, characterized in that: The spray gun body (A) is provided with an inlet tube (A1) for introducing liquid into the container, and also includes: A piston (A2) is reciprocally disposed at the outer end of a cylinder (A4) and is used to form a sealed inner cavity in the cylinder (A4). A wrench (A3) is provided on one side of the piston (A2) for pushing the piston (A2) toward the cylinder (A4) from front to back; The first valve structure (A5) is provided on the water outlet channel (2) between the cylinder section (A4) and the nozzle section (A6), and is configured to always close the flow path between the inlet pipe (A1) and the cylinder section (A4) under the pressure of the liquid in the cylinder section (A4); The switching valve (3) is constructed together with the first connector (1) and the second connector (4) which are connected to the first connector (1). The second connector (4) is located in the attachment (B) of the container and includes a socket for insertion into the upper end of the inlet tube (A1). The switching valve (3) includes a first valve seat (31) disposed on the first connector (1), a first valve ball (32), an inverted liquid pumping port formed in the first valve seat (31), and a water inlet chamber (33) communicating with the rear of the cylinder (A4). The switching valve (3) is configured such that when the sprayer is in the upward upright position, the first valve ball (32) closes the inverted liquid pumping port of the first valve seat (31), and when the sprayer is in the downward inverted position, the first valve ball (32) opens the inverted liquid pumping port, so that liquid can flow from the container to the water inlet chamber (33), and the sprayer can operate in upright mode or inverted mode.

3. The sprayer according to claim 2, characterized in that: The first connector (1) is surrounded by a convex wall (10) to form an upper cylinder with the opening facing downward. The bottom periphery of the upper cylinder or the outer wall adjacent to its bottom has the flange (11). The flange (11) is at least partially recessed downward to form a groove around which the spray gun body (A) can rotate freely. The groove constitutes the rotation area (12). The second connector (4) includes a lower cylinder. The bottom center of the lower cylinder has an inlet (41) that communicates with the inlet pipe (A1) to allow liquid to flow in. The periphery of the inlet (41) extends upward to form a first pipe (42) and a second pipe (43) arranged side by side and spaced apart, and a third pipe (44) located between the two and extending downward. The inlet pipe (A1) is inserted into the third pipe (44). The first pipe (42) is inserted into the first valve seat (31), and the second pipe (43) is inserted into the first connector (1) and forms the water inlet chamber (33). The lower cylinder and the upper cylinder also form a connecting cavity (45). The connecting cavity (45), the first valve seat (31), the water inlet chamber (33), and the inlet pipe (A1) are in fluid communication. The inverted liquid pumping port includes a first port (34) located at the lower end of the first tube (42) and a second port (35) formed between the upper end of the first tube (42) and the first valve seat (31). The bottom of the lower cylinder is also directly provided with an inflow section (40) for the liquid in the container to flow into the connecting chamber (45). When the sprayer is in the downward inverted position, the first valve ball (32) opens the first port (34) so ​​that the liquid can flow from the connecting chamber (45) through the second port (35) and the first port (34) to the water inlet chamber (33).

4. The sprayer according to claim 3, characterized in that: The groove includes a first groove wall (14) located on the inner side and a second groove wall (15) located on the outer side and sandwiched between the attachment (B) and the periphery of the container opening. The first groove wall (14) continues to extend upward toward the top of the cylinder to form the insertion part. The sealing member (130) is provided on both the inner and outer sides of the circumference of the first groove wall (14). The first groove wall (14) and the convex wall (10) form an accommodating space (16) into which the lower section of the spray gun body (A) extends. Correspondingly, the The lower section of the spray gun body (A) includes an inner convex ring (5) that can extend into the accommodating space (16) and an outer convex ring (6) spaced apart from the inner convex ring (5). The outer convex ring (6) has a lateral outward protrusion (61) inserted into the groove at a corresponding position. A gap (62) is left between the attachment (B) and the lateral outward protrusion (61) to allow it to rotate freely. The outer convex ring (6) and the inner convex ring (5) form a two-sided seal on the rotating circumferential surface with the inner and outer sides of the circumferential surface of the first groove wall (14), respectively.

5. The sprayer according to claim 4, characterized in that: The lower cylinder also includes a fourth convex ring (46) located around the first tube (42) and the second tube (43). The fourth convex ring (46) extends outward to a support platform (47) for the upper cylinder's convex wall (10) and the first groove wall (14) to rest together. The fourth convex ring (46) is sealed to the upper cylinder's convex wall (10). The inner convex ring (5) is also provided with an air supply channel (51) that allows outside air to be supplied to the container via the spray body. Correspondingly, the support platform (47) is provided with a flow channel (48) that communicates with the air supply channel (51).

6. The sprayer according to any one of claims 2 to 5, characterized in that: A pre-compression structure (7) is provided on the water outlet channel (2) between the cylinder section (A4) and the nozzle section (A6). The pre-compression structure (7) includes a second valve seat (71) and a valve (72). The second valve seat (71) and the spray gun body (A) are engaged to hold the valve (72) in the appropriate position, that is, upstream of the nozzle section (A6). The outer periphery (72a) of the valve (72) abuts against the spray gun body (A) and / or the second valve seat (71) and forms a pre-compression chamber (73). The valve (72) includes a sealing part (13). When the liquid passes through the lower chamber (75) and generates sufficient fluid pressure, the sealing part (13) can be forced to be displaced to open the water outlet channel (2) communicating with the nozzle part (A6). The sealing part (13) divides the pre-compression chamber (73) into a relatively independent upper chamber (74) and a lower chamber (75). Correspondingly, the second valve seat (71) is provided with an action part (76) adapted to the sealing part (13). The action part (76) is housed in the upper chamber (74) and can prevent the sealing part (13) from continuing to flex or move, and limit the liquid flow path through the lower chamber (75).

7. The sprayer according to claim 6, characterized in that: The valve (72) is further provided with an inner periphery (72b) at intervals on the outer periphery (72a). The inner periphery (72b) is thicker than the outer periphery (72a) and abuts against the spray gun body (A). The inner periphery (72b) divides the internal space of the lower chamber (75) from the center to the outside into a first chamber (77) and a second chamber (78). A water passage (721b) is provided at the bottom of the inner periphery (72b). After the liquid flows into the first chamber (77), it flows through the water passage to the second chamber (78). The outer periphery (72a) is kept in a sealed state by means of the surface tension of the liquid.

8. The sprayer according to claim 7, characterized in that: The water outlet channel (2) between the cylinder section (A4) and the nozzle section (A6) includes a first flow path (21) connecting the cylinder section (A4) and the lower chamber (75) and a second flow path (22) connecting the lower chamber (75) and the nozzle section (A6). The first flow path (21) is located outside the second flow path (22). The outlet of the first flow path (21) is lower than the inlet (41) of the second flow path (22), so that after the liquid flows through the first flow path (21) to the pre-compression chamber (73), it forms at least a partially inverted flow path and then enters the inlet (41) of the second flow path (22).

9. The sprayer according to claim 8, characterized in that: The pre-compression structure (7) is disposed on the top of the spray gun body (A). The top of the spray gun body (A) has an upwardly extending upper circumferential edge (8), and the second valve seat (71) is a cylindrical body with an opening facing downward. The second valve seat (71) and the upper circumferential edge (8) are relatively merged and sealed together. The first flow path (21) is formed by a vertical tube (81) perpendicular to the axial direction of the cylinder part (A4) or the water outlet channel (2). The spray gun body (A) is provided with a circumferential wall (82) around the vertical tube (81) and together they form a second flow path (22). The circumferential wall (82) is provided at least partially with a platform (83) for the valve (72) to be installed. While the outer circumferential edge (72a) of the valve (72) and the upper circumferential edge (8) are kept sealed, the sealing part (13) is held on the top edge of the vertical tube (81).

10. The sprayer according to claim 6, characterized in that: The ratio of the size of the lower chamber (75) to the size of the cylinder section (A4) must be between 1:4 and 1:

6. The cylinder section (A4) is in fluid communication with the inlet pipe (A1) of the container and is used to store liquid. The vertical height H of the sealing part (13) from the spray gun body (A) is between 1 mm and 1.4 mm.

Images