Handheld paint sprayer

Abstract

The utility model discloses a handheld paint sprayer which comprises a spraying can, a spraying gun body, a connecting boss and a liquid pumping pipe, the connecting boss and the liquid pumping pipe are installed on the spraying gun body, the spraying can is communicated with a connecting sleeve, the connecting sleeve is connected to the connecting boss in a sleeved mode through threads, and the inner wall of the connecting sleeve is connected with a connecting base in a sleeved mode through threads. A thin film bag is fixed to the connecting base, the liquid pumping pipe penetrates through the connecting base and is communicated with the thin film bag, a liquid pumping hole is formed in the side edge of the liquid pumping pipe, and an air pressure balance assembly is installed on the side edge of the sprinkling can. Negative pressure can be generated in the thin film bag due to suction, and the thin film bag is soft, so that the thin film bag can contract, paint liquid in the thin film bag can be completely sucked, and the phenomena that the paint liquid cannot be sucked due to reasons such as inclination of the sprinkling can and the like in the taking process and the residual paint liquid at the bottom cannot be completely sucked are avoided; external air balances air pressure through the air pressure balance assembly, and it is guaranteed that the film bag can normally contract.

Description

Technical Field

[0001] This utility model relates to the field of paint sprayer technology, and in particular to a handheld paint sprayer. Background Technology

[0002] A paint sprayer is a coating device used to disperse paint into a mist and spray it onto the surface of an object. For example, a common electric paint sprayer uses an electric pump to push paint to the nozzle. The electric pump, driven by an electric motor, draws paint from the paint container and delivers it to the spray gun, where it is atomized and sprayed out through the nozzle. It is suitable for home and small industrial applications. However, in actual use, we have encountered a problem: the extraction tube connected to the spray bottle sometimes fails to extract paint from the bottle due to tilting or other reasons. Additionally, paint at the bottom is sometimes not completely extracted. To better solve this problem, we propose a handheld paint sprayer. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a handheld paint sprayer.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A handheld sprayer includes a spray bottle, a spray gun body, a connecting boss mounted on the spray gun body, and a liquid extraction tube. The spray bottle is connected to a connecting sleeve, which is threaded onto the connecting boss. A connecting seat is threaded onto the inner wall of the connecting sleeve, and a thin film bag is fixed on the connecting seat. The liquid extraction tube passes through the connecting seat and communicates with the thin film bag. A liquid extraction hole is opened on the side of the liquid extraction tube, and an air pressure balancing component is installed on the side of the spray bottle.

[0006] Preferably, the spray bottle and the connecting sleeve are an integral structure.

[0007] Preferably, an annular first limiting boss is fixedly sleeved on the outside of the connecting boss, one end of the connecting sleeve abuts against the first limiting boss, and a first sealing gasket is provided between the connecting sleeve and the first limiting boss.

[0008] Preferably, the connecting sleeve has an annular second limiting boss fixedly fitted inside, the connecting seat abuts against the second limiting boss, and a second sealing gasket is provided between the connecting seat and the second limiting boss.

[0009] Preferably, the connecting seat has an injection hole, a rubber sleeve is fixedly fitted inside the injection hole, and the suction tube passes through the rubber sleeve.

[0010] Preferably, the air pressure balancing assembly includes a first air exchange pipe, a second air exchange pipe, and an air filter. The first air exchange pipe is connected to the spray bottle, and the first air exchange pipe is connected to the second air exchange pipe. An air filter is fixed inside the second air exchange pipe.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] In this invention, a film bag is inserted into the spray bottle, and then the connecting seat is threaded into the connecting sleeve. Paint is added into the film bag through the injection hole, and then the connecting sleeve is threaded onto the connecting boss. It is then ready for use. During use, paint is drawn through the extraction hole on the extraction tube. Because the extraction creates negative pressure inside the film bag, and the film bag is flexible, it contracts. This ensures that the paint inside the film bag is thoroughly extracted. Furthermore, during retrieval, the paint cannot be missed due to the spray bottle being tilted, and there is no residual paint at the bottom that cannot be completely extracted. During this process, external gas pressure is balanced by the air pressure balancing component, ensuring that the film bag can contract normally. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a handheld paint sprayer proposed in this utility model;

[0014] Figure 2 This is a schematic diagram of the spray gun body of a handheld paint sprayer proposed in this utility model;

[0015] Figure 3 for Figure 1 A partial structural diagram;

[0016] Figure 4 This is a cross-sectional view of the spray bottle of a handheld sprayer proposed in this utility model;

[0017] Figure 5 This is a schematic diagram of the air pressure balance component of a handheld paint sprayer proposed in this utility model.

[0018] In the diagram: 1. Spray gun body, 2. Spray bottle, 3. First limiting boss, 4. Connecting boss, 5. Liquid extraction pipe, 6. Liquid extraction hole, 7. Connecting sleeve, 8. Connecting seat, 9. Rubber sleeve, 10. Membrane bag, 11. Air pressure balance assembly, 111. First air exchange pipe, 112. Second air exchange pipe, 113. Air filter, 12. First sealing gasket, 13. Second sealing gasket, 14. Second limiting boss. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 A handheld spray paint dispenser includes a spray bottle 2, a spray gun body 1, a connecting boss 4 mounted on the spray gun body 1, and a liquid extraction tube 5. A connecting sleeve 7 is connected to the spray bottle 2 and threadedly connected to the connecting boss 4. A connecting seat 8 is threadedly connected to the inner wall of the connecting sleeve 7, and a thin film bag 10 is fixed to the connecting seat 8. The liquid extraction tube 5 passes through the connecting seat 8 and communicates with the thin film bag 10. A liquid extraction hole 6 is provided on the side of the liquid extraction tube 5. An air pressure balancing component 11 is installed on the side of the spray bottle 2. The thin film bag 10 is inserted into the spray bottle 2, and then the connecting seat 8 is threadedly inserted into the connecting sleeve 7. Paint is added into the thin film bag 10 through the liquid injection hole. Then, the connecting sleeve 7 is threadedly fitted onto the connecting boss 4. The device is then ready for use. During use, paint is drawn through the liquid extraction hole 6 on the liquid extraction tube 5. Because the suction creates negative pressure inside the thin film bag 10, and the thin film bag 10 is flexible, it will... The shrinkage mechanism ensures that the paint in the film bag 10 is completely sucked out, preventing issues such as insufficient suction due to the tilt of the spray bottle 2 or the presence of residual paint at the bottom. During this process, the external gas pressure is balanced by the air pressure balancing component 11, ensuring that the film bag 10 can shrink normally. The spray bottle 2 and the connecting sleeve 7 are an integral structure. The connecting boss 4 is fixedly fitted with an annular first limiting boss 3. One end of the connecting sleeve 7 rests against the first limiting boss 3. A first sealing gasket 12 is provided between the connecting sleeve 7 and the first limiting boss 3. An annular second limiting boss 14 is fixedly fitted inside the connecting sleeve 7. The connecting seat 8 rests against the second limiting boss 14. A second sealing gasket 13 is provided between the connecting seat 8 and the second limiting boss 14. The connecting seat 8 has an injection hole, and a rubber sleeve 9 is fixedly fitted inside the injection hole. The suction tube 5 passes through the rubber sleeve 9.

[0021] Reference Figure 5 The air pressure balancing assembly 11 includes a first air exchange pipe 111, a second air exchange pipe 112, and an air filter 113. The first air exchange pipe 111 is connected to the spray bottle 2, and the second air exchange pipe 112 is connected to the first air exchange pipe 111. An air filter 113 is fixed inside the second air exchange pipe 112. The first air exchange pipe 111 and the second air exchange pipe 112 are connected to the external atmospheric pressure, and the external gas balances the pressure inside the spray bottle 2 with the external atmospheric pressure through the first air exchange pipe 111 and the second air exchange pipe 112.

[0022] Working principle: When in use, insert the film bag 10 into the spray bottle 2, then thread the connecting seat 8 into the connecting sleeve 7, add paint into the film bag 10 through the injection hole, and then thread the connecting sleeve 7 onto the connecting boss 4. It is then ready for use. During use, the paint is drawn through the extraction hole 6 on the extraction tube 5. Due to the suction, a negative pressure is generated inside the film bag 10. Since the film bag 10 is soft, it will shrink, thus fully extracting the paint from the film bag 10. During the process, the paint will not be missed due to the spray bottle 2 being tilted, and there will be no residual paint at the bottom that cannot be extracted. During this process, the external gas pressure is balanced by the air pressure balancing component 11 to ensure that the film bag 10 can shrink normally.

[0023] The operating principle of the air pressure balancing component 11 is as follows: the first air exchange pipe 111 and the second air exchange pipe 112 are connected to the external atmospheric pressure, and the external gas balances the pressure inside the spray bottle 2 with the external atmospheric pressure through the first air exchange pipe 111 and the second air exchange pipe 112.

[0024] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A hand-held paint sprayer comprising a spray pot (2), a spray gun body (1), a connecting boss (4) mounted on the spray gun body (1) and a suction tube (5), characterized in that, The spout pot (2) is communicated with a connecting sleeve (7), the connecting sleeve (7) is sleeved on the connecting boss (4) through threads, the inner wall of the connecting sleeve (7) is sleeved with a connecting seat (8) through threads, the connecting seat (8) is fixed with a film bag (10), the liquid suction pipe (5) penetrates the connecting seat (8) and communicates with the film bag (10), the side of the liquid suction pipe (5) is provided with a liquid suction hole (6), and the side of the spout pot (2) is provided with an air pressure balance assembly (11).

2. A hand-held paint sprayer according to claim 1, wherein, The spout pot (2) and the connecting sleeve (7) are an integral structure.

3. A hand-held paint sprayer according to claim 1, wherein, The outer part of the connecting boss (4) is fixedly sleeved with an annular first limiting boss (3), one end of the connecting sleeve (7) abuts against the first limiting boss (3), and the first limiting boss (3) and the connecting sleeve (7) are provided with a first sealing washer (12).

4. A hand-held paint sprayer according to claim 1, wherein, The inner part of the connecting sleeve (7) is fixedly sleeved with an annular second limiting boss (14), the connecting seat (8) abuts against the second limiting boss (14), and the second limiting boss (14) and the connecting seat (8) are provided with a second sealing washer (13).

5. A hand-held paint sprayer according to claim 1 wherein, The connecting seat (8) is provided with a liquid injection hole, the liquid injection hole is fixedly sleeved with a rubber sleeve (9), and the liquid suction pipe (5) penetrates the rubber sleeve (9).

6. A hand-held paint sprayer according to claim 1, wherein, The air pressure balance assembly (11) comprises a first air exchange pipe (111), a second air exchange pipe (112) and an air filter screen (113), the first air exchange pipe (111) communicates with the spout pot (2), the first air exchange pipe (111) is communicated with the second air exchange pipe (112), and the second air exchange pipe (112) is fixedly provided with the air filter screen (113).

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