A hand held sprayer

Abstract

The present application provides a kind of manual sprayer, belongs to the technical field of sprayer.It solves the problem of low efficiency of the existing manual sprayer sprays medicine.The manual sprayer includes a medicine box, a gas chamber installed in the medicine box, a rocker hinged outside the medicine box, a connecting rod connecting the gas chamber and the rocker, an air inlet cylinder fixed outside the medicine box and a sliding plug rod slidingly arranged in the air inlet cylinder, the bottom of the sliding plug rod extends outside the air inlet cylinder and is connected with the connecting rod or the rocker, the top of the air inlet cylinder has an air inlet nozzle communicating with the top of the medicine box, and the rocker swings to drive the sliding plug rod to move up and down to make the gas from the outside enter the medicine box through the air inlet cylinder and the air inlet nozzle.The manual sprayer has the advantages of high efficiency of spraying medicine.

Description

Technical Field

[0001] This invention belongs to the field of sprayer technology and relates to a manual sprayer. Background Technology

[0002] A sprayer is a device that uses air suction to turn pesticides or other liquids into a mist and spray it evenly onto other objects. It consists of a compressed air device, a thin tube, and a nozzle. In rural areas, sprayers are an indispensable agricultural tool for controlling pests and diseases.

[0003] Existing sprayers, such as the double-lip sealed air chamber sprayer disclosed in Chinese patent literature [Patent No.: 200920120381.1; Application Publication No.: CN201418333Y], include a medicine tank and an air chamber. The air chamber is installed in the medicine tank air chamber fixing hole through the air chamber outer cover. A pump is installed at the lower end of the air chamber. A rocker arm is installed at the bottom of the medicine tank. The rocker arm is connected to the air chamber through a connecting rod. The water outlet on the air chamber is connected to a rubber hose, a switch, a spray bar, and a nozzle. A double-lip sealing ring is installed between the air chamber and the air chamber outer cover. The double-lip sealing ring includes a main body. The inner side of the main body is formed with an upper lip and a lower lip. The upper and lower lips are formed with a concave arc. The upper and lower lips are in contact with the air chamber.

[0004] In this type of sprayer, the air chamber is installed inside the medicine tank, and a rocker arm is installed at the bottom of the tank. The rocker arm is connected to the air chamber via a connecting rod. The rocker arm's movement drives the air chamber to move, causing it to do work. This work propels the medicine in the tank through the connecting hose, spray bar, and nozzle, thus achieving the spraying of the medicine. However, in this type of sprayer, the power to spray the medicine relies solely on the work done by the movement of the air chamber. Since the force generated by the movement of the air chamber is constant, the spraying efficiency of this type of sprayer is relatively low. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in the prior art by proposing a manual sprayer, which solves the technical problem of how to improve the spraying efficiency of the sprayer.

[0006] The objective of this invention can be achieved through the following technical solution: A manual sprayer includes a medicine tank, an air chamber installed in the medicine tank, a rocker arm hinged outside the medicine tank, and a connecting rod connecting the air chamber and the rocker arm. The sprayer is characterized in that it further includes an air inlet cylinder fixed outside the medicine tank and a sliding stopper rod slidably inserted in the air inlet cylinder. The bottom of the sliding stopper rod extends outside the air inlet cylinder and is connected to the connecting rod or the rocker arm. The top of the air inlet cylinder has an air inlet nozzle communicating with the top of the medicine tank. The rocker arm swings, causing the sliding stopper rod to move up and down, allowing external gas to enter the medicine tank through the air inlet cylinder and the air inlet nozzle.

[0007] During spraying, the operator moves the crank up and down, which simultaneously moves the air chamber and the sliding rod up and down. The movement of the air chamber generates an existing spraying force, while the movement of the sliding rod draws external air through the air inlet and nozzle into the cavity at the top of the spray tank, increasing the air pressure inside the tank. This makes the air pressure inside the tank greater than the external air pressure, generating another spraying force. This single cranking motion produces two spraying forces, effectively increasing the spraying force compared to existing technologies, thus improving the sprayer's efficiency. The air chamber and sliding rod move synchronously up and down. When both move upwards, the sliding rod increases the air pressure at the top of the tank, causing the pesticide to spray out. When both move downwards, the air chamber's movement generates the spraying force. In other words, whether the crank is moving up or down, a force propels the pesticide out of the sprayer, ensuring a uniform, continuous, and uninterrupted spray, further improving the sprayer's efficiency.

[0008] In the aforementioned manual sprayer, the air inlet cylinder has a one-way ring. The outer circumferential wall of the one-way ring is sealed and fixedly connected to the inner wall of the air inlet cylinder. A one-way structure is provided in the middle of the one-way ring to prevent gas from flowing from the medicine tank to the sliding stopper rod. Both the one-way ring and the one-way structure are located above the sliding stopper rod. This structure ensures that gas can only enter the medicine tank through the outside, the air inlet cylinder, and the air inlet nozzle, while gas in the medicine tank cannot escape from the air inlet cylinder, maintaining high air pressure inside the medicine tank and improving the spraying efficiency of the sprayer.

[0009] In the aforementioned manual sprayer, the one-way structure includes several first vent holes spaced apart at the edge of the inner wall of a one-way ring and an elastic one-way rubber head. The one-way ring is inclined downwards towards the center along its perimeter. The one-way rubber head includes a baffle at the bottom and a cap at the top. The cap is located above the one-way ring and covers all the first vent holes. The baffle passes through the one-way ring and abuts against the bottom of the one-way ring, pressing the edge of the cap tightly against the one-way ring. The one-way rubber head is made of rubber and is elastic, capable of a certain amount of deformation. The high-pressure gas generated by the upward movement of the sliding rod deforms the cap. This high-pressure gas forces its way through the cap and into the top of the air inlet cylinder, entering the medicine tank through the air inlet nozzle. The downward movement of the sliding rod creates a low-pressure area between the one-way ring and the sliding rod. Due to the pressure difference, the cap is pressed more tightly against the one-way ring and blocks the first vent holes, preventing gas in the medicine tank from escaping from the air inlet cylinder, thus maintaining high pressure inside the medicine tank and improving the spraying efficiency of the sprayer. The one-way ring is inclined downwards towards the center along its perimeter, providing space for deformation when the one-way rubber head is pressed. This allows the umbrella cap to better seal the first vent when pressed, and also allows the first vent to better connect the space above and below the one-way ring when gas rushes through the edge of the umbrella cap.

[0010] In the aforementioned manual sprayer, the one-way nozzle further includes a connecting post located in the middle. The baffle, umbrella cap, and connecting post are an integral structure. The inner sidewall of the one-way ring has a downwardly protruding ring. The first vent hole is located outside the protruding ring. The connecting post passes through the protruding ring, and the baffle abuts against the bottom of the protruding ring. This structure gives the one-way nozzle a certain height, allowing it to be more firmly positioned against the one-way ring, improving the stability of the one-way nozzle, increasing the air intake efficiency of the air inlet cylinder and piston rod, and thus improving the spraying efficiency of the sprayer.

[0011] In another case, in the aforementioned manual sprayer, the one-way structure includes a valve body, a valve core, and a spring. The inner sidewall of the one-way ring has a downwardly protruding ring. The valve body is sealed and fixed in the protruding ring. The valve core and the spring are both located in the valve body. The valve core is sealed against the valve body under the action of the spring force.

[0012] In the aforementioned manual sprayer, the sliding rod includes a straight rod and an annular sliding plug made of rubber. The top of the rod has a one-way groove recessed radially. The sliding plug includes a sealing part that seals against the inner wall of the air inlet and a one-way part embedded in the one-way groove. The thickness of the one-way part along the axial direction of the rod is less than the width between the upper and lower walls of the one-way groove. The upper wall of the one-way groove has several second vent holes. The top of the rod and the sliding plug cooperate to divide the cavity inside the air inlet into an upper cavity and a lower cavity. When the sliding rod moves upward, the one-way part abuts against the lower wall, preventing the upper and lower cavities from communicating. When the sliding rod moves downward, the one-way part abuts against the upper wall, connecting the upper and lower cavities through the second vent holes. When the sliding rod and the sliding plug move up and down, they will have a certain relative displacement. When the sliding plug rod moves upward, the sliding plug will move backward, causing the one-way part to abut against the lower groove wall, thus preventing the upper and lower chambers from communicating. Then, the sliding plug moves upward with the sliding rod, compressing the space between the one-way ring and the sliding rod, increasing the air pressure in this space. This air pressure can push open the one-way rubber head, thus inflating the medicine box. When the sliding plug rod moves downward, the sliding plug will move backward, causing the one-way part to abut against the upper groove wall, connecting the upper and lower chambers through the second vent hole. This allows outside air to enter the space between the one-way ring and the sliding rod through the second vent hole, filling the space with air. The rocker arm swings up and down, and the sliding rod moves up and down, thus continuously inflating the medicine box with outside air.

[0013] In the aforementioned manual sprayer, the upper surface of the one-way section is provided with several raised strips at intervals. A gap exists between the circumferential edge of the upper wall of the one-way groove and the sealing part. When the sliding rod moves upward, the raised strips abut against the upper groove wall. This structure provides sufficient airflow cross-sectional area between the top of the sliding rod and the sliding plug, allowing external gas to better enter the space between the one-way ring and the sliding rod, ensuring effective inflation of the medicine tank.

[0014] In the aforementioned manual sprayer, the outer wall of the sealing part is inclined outward from bottom to top, and the top of the outer wall of the sealing part has a protruding edge that extends radially outward along the slide rod. This structure allows the sealing part to fit more tightly against the air inlet cylinder, preventing air leakage and ensuring effective inflation of the medicine tank.

[0015] In the aforementioned manual sprayer, both the connecting rod and the sliding rod are arranged vertically, and the connecting rod is connected to the bottom of the sliding rod via a pin. This structure allows for better synchronous vertical movement of the air chamber and the sliding rod.

[0016] In the aforementioned manual sprayer, the top of the medicine tank has a liquid inlet, which is sealed by a tank cover. A one-way valve, allowing outside air to flow into the medicine tank, is fixedly connected to the tank cover. This structure ensures that the air pressure inside the medicine tank is not lower than the outside air pressure, thus guaranteeing the sprayer's spraying efficiency.

[0017] Compared with the prior art, the manual sprayer provided by the present invention has the following advantages:

[0018] 1. This sprayer uses the swing of a rocker arm to move the air chamber and the sliding rod up and down synchronously. The movement of the air chamber generates one spraying force, and the movement of the sliding rod generates another spraying force. The two forces are staggered, so that the sprayer always has one force to spray the medicine, making the medicine sprayed from the nozzle uniform, continuous and uninterrupted, thus improving the spraying efficiency of the sprayer.

[0019] 2. This sprayer, through the combination of a one-way ring, one-way rubber head, sliding plug, and sliding rod, ensures that external gas can be delivered into the medicine tank through the air inlet and sliding plug rod, thereby improving the spraying efficiency of the sprayer. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this manual sprayer.

[0021] Figure 2 This is a cross-sectional view of the overall structure of this manual sprayer.

[0022] Figure 3 This is a cross-sectional view of the one-way structure and the sliding stopper of this manual sprayer.

[0023] Figure 4 This is an exploded view of the top of the slide bar and the stopper of this manual sprayer.

[0024] In the diagram, 1. Medicine box; 2. Air chamber; 3. Rocker arm; 4. Connecting rod; 5. Air inlet cylinder; 6. Sliding rod; 61. Sliding rod; 611. One-way groove; 612. Upper groove wall; 613. Lower groove wall; 614. Second vent hole; 62. Sliding plug; 621. Sealing part; 622. One-way part; 623. Raised strip; 624. Raised edge; 7. Air inlet nozzle; 8. One-way ring; 81. Raised ring; 9. First vent hole; 10. One-way rubber head; 101. Baffle; 102. Umbrella cap; 103. Connecting column; 11. Upper chamber; 12. Lower chamber; 13. Liquid inlet hole; 14. Box cover; 15. One-way valve. Detailed Implementation

[0025] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0026] Example 1

[0027] like Figure 1 , Figure 2 As shown, this manual sprayer includes a medicine tank 1, an air chamber 2, a rocker arm 3, a connecting rod 4, an air inlet cylinder 5, a sliding rod 6, an air inlet nozzle 7, and a one-way ring 8.

[0028] An air chamber 2 is installed inside the medicine box 1. A rocker arm 3 is hinged to the outside of the medicine box 1. The air chamber 2 and the rocker arm 3 are connected by a connecting rod 4. An air inlet cylinder 5 is fixed to the outside of the medicine box 1. The top of the air inlet cylinder 5 has an air inlet nozzle 7, which communicates with the top of the medicine box 1. A sliding plug rod 6 slides through the air inlet cylinder 5. Both the connecting rod 4 and the sliding plug rod 6 are arranged vertically. In this embodiment, the bottom of the sliding plug rod 6 extends out of the air inlet cylinder 5 and is connected to the connecting rod 4 by a pin. In actual production, the bottom of the sliding plug rod 6 extending out of the air inlet cylinder 5 can be connected to the rocker arm 3. The top of the medicine box 1 has a liquid inlet hole 13, which is sealed by a box cover 14. A one-way valve 15 is fixed in the box cover 14 to allow outside air to flow into the medicine box 1.

[0029] The air inlet cylinder 5 has a one-way ring 8. The one-way ring 8 is inclined downwards towards the center along its perimeter. The inner side wall of the one-way ring 8 has a downward protruding ring 81. The one-way ring 8, the protruding ring 81 and the air inlet cylinder 5 are integrally formed by injection molding. The outer circumferential wall of the one-way ring 8 is sealed and fixed to the inner side wall of the air inlet cylinder 5. The middle of the one-way ring 8 is provided with a one-way structure to prevent the gas in the medicine box 1 from flowing to the sliding rod 6. The one-way ring 8 and the one-way structure are both located above the sliding rod 6.

[0030] like Figure 3As shown, the one-way structure includes four first vent holes 9 spaced apart at the inner sidewall edge of the one-way ring 8 and a flexible one-way rubber head 10. The first vent holes 9 are located outside the convex ring 81. The one-way rubber head 10 includes a baffle 101 at the bottom, an umbrella cap 102 at the top, and a connecting post 103 in the middle. The baffle 101, umbrella cap 102, and connecting post 103 are integrally formed by injection molding. The umbrella cap 102 is located above the one-way ring 8 and covers all the first vent holes 9. The connecting post 103 passes through the convex ring 81. The baffle 101 passes through the convex ring 81 and abuts against the bottom of the convex ring 81 so that the edge of the umbrella cap 102 is pressed against the one-way ring 8.

[0031] like Figure 4 As shown, the slider 6 includes a straight slider 61 and an annular slider 62 made of rubber. The top of the slider 61 has a one-way groove 611 recessed radially along the slider 61. The slider 62 includes a sealing part 621 that seals against the inner wall of the air intake cylinder 5 and a one-way part 622 embedded in the one-way groove 611. The outer wall of the sealing part 621 is inclined from bottom to top and outward. The top of the outer wall of the sealing part 621 has a radially outward protrusion along the slider 61. The upper surface of the one-way part 622 is provided with convex strips 623 at intervals. The thickness of the one-way part 622 along the axial direction of the slide rod 61 is less than the width between the upper groove wall 612 and the lower groove wall 613 of the one-way groove 611. There is a gap between the upper groove wall 612 of the one-way groove 611 and the sealing part 621. The upper groove wall 612 of the one-way groove 611 has a second vent hole 614. The top of the slide rod 61 and the slide plug 62 cooperate to divide the cavity in the air inlet cylinder 5 into an upper cavity 11 and a lower cavity 12. When the slider rod 6 moves upward, the one-way part 622 abuts against the lower groove wall 613, preventing the upper cavity 11 and the lower cavity 12 from communicating with each other. When the slider rod 6 moves downward, the protrusion 623 abuts against the upper groove wall 612, connecting the upper cavity 11 and the lower cavity 12 through the second vent 614, and through the gap between two adjacent protrusions 623 and the gap between the upper groove wall 612 of the one-way groove 611 and the sealing part 621.

[0032] During operation, when the rocker arm 3 swings upward, it moves the connecting rod 4 upward, thereby causing the air chamber 2 and the sliding rod 6 to move upward. The sliding rod 6 then sends external gas into the medicine tank 1 through the air inlet 5 and the air inlet 7, thus achieving liquid spraying. When the rocker arm 3 swings downward, it moves the connecting rod 4 downward, thereby causing the air chamber 2 and the sliding rod 6 to move downward. The air chamber 2 then performs work to achieve liquid spraying.

[0033] Example 2

[0034] This embodiment is basically the same as the structure and principle of Embodiment 1. The difference is that in this embodiment, the one-way structure includes a valve body, a valve core and a spring. The edge of the inner sidewall of the one-way ring 8 has a downward protruding convex ring 81. The valve body is sealed and fixed in the convex ring 81. The valve core and the spring are both located in the valve body. The valve core is sealed and abuts against the valve body under the action of the spring force.

[0035] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0036] Although this document frequently uses terms such as medicine box 1, air chamber 2, rocker arm 3, connecting rod 4, air inlet cylinder 5, sliding rod 6, sliding rod 61, one-way groove 611, upper groove wall 612, lower groove wall 613, second vent hole 614, sliding plug 62, sealing part 621, one-way part 622, protruding strip 623, protruding edge 624, air inlet nozzle 7, one-way ring 8, protruding ring 81, first vent hole 9, one-way rubber head 10, baffle 101, umbrella cap 102, connecting post 103, upper cavity 11, lower cavity 12, liquid inlet hole 13, box cover 14, one-way valve 15, etc., the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. A manual sprayer, comprising a medicine tank (1), an air chamber (2) installed in the medicine tank (1), a rocker arm (3) hinged to the outside of the medicine tank (1), and a connecting rod (4) connecting the air chamber (2) and the rocker arm (3), characterized in that, The sprayer also includes an air inlet cylinder (5) fixed outside the medicine tank (1) and a sliding stopper rod (6) slidably inserted in the air inlet cylinder (5). Both the connecting rod (4) and the sliding stopper rod (6) are arranged vertically. The bottom of the sliding stopper rod (6) extends outside the air inlet cylinder (5) and is connected to the connecting rod (4) or the rocker arm (3). The top of the air inlet cylinder (5) has an air inlet nozzle (7) that communicates with the top of the medicine tank (1). The rocker arm (3) swings, causing the sliding stopper rod (6) to move up and down, allowing air from the outside... Gas enters the medicine tank (1) through the air inlet (5) and air inlet (7). When working, the rocker arm (3) swings upward, driving the connecting rod (4) to move upward, thereby causing the air chamber (2) and the sliding rod (6) to move upward. The sliding rod (6) sends the outside gas into the medicine tank (1) through the air inlet (5) and air inlet (7) to achieve liquid spraying. The rocker arm (3) swings downward, driving the connecting rod (4) to move downward, thereby causing the air chamber (2) and the sliding rod (6) to move downward. The air chamber (2) does work to achieve liquid spraying.

2. A manual sprayer according to claim 1, characterized in that, The air inlet cylinder (5) has a one-way ring (8). The outer circumferential wall of the one-way ring (8) is sealed and fixed to the inner wall of the air inlet cylinder (5). The middle of the one-way ring (8) is provided with a one-way structure to prevent the gas in the medicine box (1) from flowing to the sliding rod (6). The one-way ring (8) and the one-way structure are both located above the sliding rod (6).

3. A manual sprayer according to claim 2, characterized in that, The one-way structure includes several first vent holes (9) spaced apart at the edge of the inner wall of the one-way ring (8) and a flexible one-way rubber head (10). The one-way ring (8) is inclined downwards towards the center around its perimeter. The one-way rubber head (10) includes a baffle (101) at the bottom and an umbrella cap (102) at the top. The umbrella cap (102) is located above the one-way ring (8) and covers all the first vent holes (9). The baffle (101) passes through the one-way ring (8) and abuts against the bottom of the one-way ring (8) so that the edge of the umbrella cap (102) is pressed against the one-way ring (8).

4. A manual sprayer according to claim 3, characterized in that, The one-way rubber head (10) also includes a connecting post (103) located in the middle. The baffle (101), umbrella cap (102) and connecting post (103) are an integral structure. The inner sidewall of the one-way ring (8) has a protruding ring (81) that protrudes downward. The first vent hole (9) is located outside the protruding ring (81). The connecting post (103) passes through the protruding ring (81). The baffle (101) abuts against the bottom of the protruding ring (81).

5. A manual sprayer according to claim 2, characterized in that, The one-way structure includes a valve body, a valve core, and a spring. The inner sidewall of the one-way ring (8) has a downwardly protruding convex ring (81). The valve body is sealed and fixed in the convex ring (81). The valve core and the spring are both located in the valve body. The valve core is sealed against the valve body under the action of the spring force.

6. A manual sprayer according to any one of claims 1-5, characterized in that, The slide rod (6) includes a straight rod-shaped slide rod (61) and an annular slide plug (62) made of rubber material. The top of the slide rod (61) has a one-way groove (611) recessed radially along the slide rod (61). The slide plug (62) includes a sealing part (621) that seals against the inner wall of the air intake cylinder (5) and a one-way part (622) embedded in the one-way groove (611). The thickness of the one-way part (622) along the axial direction of the slide rod (61) is less than the width between the upper groove wall (612) and the lower groove wall (613) of the one-way groove (611). The upper groove wall (612) has several second vent holes (614). The top of the slide rod (61) and the slide plug (62) cooperate to divide the cavity in the air inlet cylinder (5) into an upper cavity (11) and a lower cavity (12). When the slide plug rod (6) moves upward, the one-way part (622) abuts against the lower groove wall (613) so that the upper cavity (11) and the lower cavity (12) are not connected to each other. When the slide plug rod (6) moves downward, the one-way part (622) abuts against the upper groove wall (612) so that the upper cavity (11) and the lower cavity (12) are connected through the second vent holes (614).

7. A manual sprayer according to claim 6, characterized in that, The upper surface of the one-way part (622) is provided with a plurality of protrusions (623) spaced apart. There is a gap between the circumferential edge of the groove wall (612) of the one-way groove (611) and the sealing part (621). When the sliding rod (6) moves upward, the protrusions (623) abut against the upper groove wall (612).

8. A manual sprayer according to claim 6, characterized in that, The outer wall of the sealing part (621) is inclined outward from bottom to top, and the top of the outer wall of the sealing part (621) has a protruding edge (624) that protrudes outward along the radial direction of the slide bar (61).

9. A manual sprayer according to any one of claims 1-5, characterized in that, The connecting rod (4) is connected to the bottom of the sliding rod (6) by a pin.

10. A manual sprayer according to any one of claims 1-5, characterized in that, The top of the medicine box (1) has a liquid inlet hole (13), which is sealed by a box cover (14). A one-way valve (15) is fixed in the box cover (14) to allow outside air to flow into the medicine box (1).

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