Improved all-plastic miniature spray gun

Abstract

The utility model relates to an improved all-plastic miniature spray gun, which is designed aiming at the technical problems that the plastic spring structure design of the existing similar product is not good enough, so that the production and the assembly are inconvenient, the service life is difficult to stabilize, the pressure intensity at the water inlet of the main body is increased, the structure design is not good enough, and the spraying effect is not good enough. The main point is that a rubber elastic sleeve is arranged on the outer diameter of a cavity opening at a piston cavity on one side of a main body of the all-plastic micro spray gun, a sleeve opening at one end of the rubber elastic sleeve is sleeved into the outer diameter of the cavity opening at the piston cavity of the main body, and the other end of the rubber elastic sleeve protrudes towards one side of a wrench towards a column sleeve which is shrunk towards the middle; one end of the connecting piece is connected with a column groove in the top of the piston piece in the main body through a column sleeve of the rubber elastic sleeve, and the other end of the connecting piece extends out to be buckled to a sleeve opening of the column sleeve of the rubber elastic sleeve and abuts against the inner side of the wrench in a buckled mode. A fixed or movable lower elastic piece is arranged in an inner hole of the plug sleeve piece, an upper elastic piece is arranged above the inner hole of the plug sleeve piece in a main body water inlet hole between the upper through hole and the lower through hole of the main body, and the upper elastic piece comprises an elastic plug and an elastic cover.

Description

Technical Field

[0001] This utility model relates to a miniature spray gun, specifically an improved all-plastic miniature spray gun. Background Technology

[0002] Miniature spray guns, also known as miniature atomizers, utilize the movement of a piston within a pump body. This movement causes gas flow within the pump body, reducing its pressure while maintaining a constant pressure outside. This pressure difference guides the liquid out of the pump body, where it is instantly atomized upon encountering the high-speed airflow. Some existing miniature atomizers employ all-plastic structures for their components, facilitating overall recycling; for example, Chinese patent application number 202110954269.3, authorized on April 7, 2023, entitled "All-Plastic Miniature Spray Gun." However, the plastic spring structure design in the aforementioned product and similar products is flawed, leading to inconvenient production and assembly, unstable service life, and an inadequate design at the main water inlet, resulting in poor spraying performance. Summary of the Invention

[0003] To overcome the aforementioned shortcomings, the purpose of this utility model is to provide an improved all-plastic micro spray gun, primarily addressing the technical problems of inadequate plastic spring structure design in existing similar products, which leads to inconvenient production and assembly, unstable service life, and poor spraying effect due to increased pressure at the main body water inlet. This objective is achieved through the following technical solution.

[0004] An improved all-plastic miniature spray gun has an L-shaped body and internal channels. The water outlet of the body is equipped with a cap. The piston chamber inside the water inlet of the body has an upper through hole and a lower through hole at the upper and lower ends, respectively. The outer diameter of the body is equipped with a cover. The inner groove of the water inlet of the body is equipped with a plug kit. The inner hole of the plug kit is equipped with a suction tube. The outer diameter of the water inlet of the body outside the plug kit is equipped with a large circle. The piston cylinder on the wrench side of the body is equipped with a piston chamber. The piston chamber of the body is equipped with a piston component. One end of the piston component is fitted into the piston chamber of the body. The sealing leaf on the outer diameter of the piston end abuts against the inner diameter of the piston chamber of the body for sealing. The other end of the piston component is engaged with the inner side of the wrench through a connector. One end of the wrench is fixed to the pins on both sides of the outer diameter of the water outlet of the body. The key structural design features a rubber sleeve on the outer diameter of the piston chamber opening of the main body. One end of the rubber sleeve fits into the outer diameter of the piston chamber opening, while the other end, a tapering sleeve, protrudes towards the wrench. One end of a connector connects to the groove at the top of the piston component inside the main body via the sleeve of the rubber sleeve, while the other end extends out and engages with the sleeve opening of the sleeve of the rubber sleeve, abutting against the inner side of the wrench. Thus, this all-plastic miniature spray gun replaces the existing arched plastic spring with the aforementioned rubber sleeve, and the connector keeps the rubber sleeve fixed to the outer diameter of the piston chamber during deformation or reset, while also maintaining the connection between the wrench and the piston component.

[0005] The inner hole of the plug assembly is provided with a fixed or movable lower spring. An upper spring is located above the inner hole of the plug assembly within the main body's water inlet hole between the upper and lower through holes. The upper spring is fixed to the main body's water inlet hole by the plug assembly. The inner wall of the main body's water inlet hole is provided with a guide groove. The main body's water inlet hole is conical, and the corresponding upper spring is conical. The lower through hole of the main body remains open. When the upper through hole of the main body is moved inward by a wrench-driven piston, the lower spring controls the opening or closing of the main body's water inlet hole through pressure changes. Simultaneously, the upper spring deforms through pressure changes to open or close the main body's upper through hole. The aforementioned lower spring can be an elastic element, a plastic element, or a plastic ball. Specifically, the lower spring can be made of rubber, a plastic lower assembly, or a plastic ball confined within the inner hole, depending on actual needs, to control the liquid inflow when the channel is opened or closed.

[0006] The upper spring component includes a spring plug and a spring cover. One end of the spring cover's bottom is sealed and engaged with one end of the spring plug's cylindrical portion. The opening of the spring cover is integrally connected to the other end of the spring plug; the diameter of the cylindrical end is larger than the diameter of the other end of the spring cover's cylindrical body. The height of the spring plug's cylindrical portion is smaller than the height of the spring cover's cylindrical body. The spring plug has an internal cylindrical cavity, and the spring cover is located at the upper through-hole of the main body. The above is a specific structural embodiment of the upper spring component, where the spring cover is an elastic element.

[0007] The bottom of the upper spring plug is provided with a raised cross rib, and the lower spring is a plastic sheet or a lower spring sleeve. The plastic sheet in the top inner hole of the plug assembly floats up and down through the gap at the bottom of the cross rib.

[0008] The plug assembly has a notch on one side of the top opening of its inner bore, which is aligned with the lower through hole inside the main body. The above describes a specific structural embodiment of the top inner bore of the plug assembly, controlling the length of the water inlet hole inside the main body and the height of the top inner bore of the plug assembly.

[0009] The plug assembly has a raised sealing ring on its outer diameter. An air vent is located on one side of the platform above the sealing ring, and an inner hole is located on the other side. The inner hole protrudes upwards and downwards respectively. A raised retaining ring is located on the top edge of the platform. The plug assembly is fixed to the inner groove of the water inlet of the main body via the retaining ring. The air vent of the plug assembly is located in the cavity below the connecting rib of the main body. The above is a specific structural embodiment of the plug assembly, which facilitates the fastening, fixing, and sealing of the plug assembly with the main body.

[0010] This utility model has a reasonable structural design, long service life, convenient assembly and production, and good spraying and liquid inlet effects. In particular, it replaces the existing arched plastic spring structure with a rubber sleeve, which improves the stability and service life of the spring. It is suitable for use as an all-plastic miniature spray gun and for structural improvements of similar products. Attached Figure Description

[0011] Figure 1 This is a partial exploded structural diagram of an embodiment of the present invention, with the casing omitted in the diagram.

[0012] Figure 2 yes Figure 1 A schematic diagram of the assembled 3D structure, with the dotted lines representing the casing.

[0013] Figure 3 yes Figure 2 A side view of the structure is shown, with the casing omitted.

[0014] Figure 4 yes Figure 3 The diagram shows a cross-sectional view, where the dotted lines represent plastic sheets that have been replaced with a lower spring sleeve.

[0015] Figure 5 yes Figure 4 A schematic diagram of the structure at the inner hole of the large-circle inner plug kit.

[0016] Attached figures and their names: 1. Main body, 101. Guide channel, 2. Spear cover, 3. Spear plug, 4. Plastic sheet, 5. Plug kit, 501. Notch, 502. Sealing ring, 6. Large ring, 7. Piston, 701. Column groove, 8. Rubber sleeve, 801. Column sleeve, 9. Connector, 10. Wrench, 11. Head cap, 12. Cover, 13. Spear base, 14. Spear cover. Implementation

[0017] The structure and use of this utility model will now be further described with reference to the accompanying drawings. Figures 1-5 In the embodiment shown, the main body 1 and internal channels of the all-plastic miniature spray gun are L-shaped. The water outlet of the main body is provided with a cap 11. The upper and lower ends of the piston chamber on one side of the water inlet of the main body are respectively provided with an upper through hole and a lower through hole. The outer diameter of the main body is provided with a cover 12. The inner groove of the water inlet of the main body is provided with a plug kit 5. The inner hole of the plug kit is provided with a suction tube. The outer diameter of the water inlet of the main body outside the plug kit is provided with a large ring 6. The piston cylinder on one side of the wrench 10 of the main body is provided with a piston chamber. The piston chamber of the main body is provided with a piston component 7. One end of the piston component is fitted into the piston chamber of the main body. The sealing leaf of the outer diameter of the piston end abuts against the inner diameter of the piston chamber of the main body for sealing. The other end of the piston component is engaged with the inner side of the wrench through a connector 9. One end of the wrench is fixed to the pins on both sides of the outer diameter of the water outlet of the main body. The specific structure is as follows: The piston cavity of the main body is provided with a rubber sleeve 8 on the outer diameter of the cavity opening. One end of the rubber sleeve is fitted into the outer diameter of the piston cavity of the main body. The other end of the rubber sleeve, the cylindrical sleeve 801 that narrows towards the middle, protrudes towards the wrench side. One end of the connector is connected to the cylindrical groove 701 on the top of the piston in the main body through the cylindrical sleeve of the rubber sleeve. The other end of the connector extends out and is fastened to the sleeve opening of the cylindrical sleeve of the rubber sleeve and is fastened and abutted against the inside of the wrench.

[0018] The aforementioned plug assembly has a fixed or movable lower spring piece in its inner hole. An upper spring piece is located above the inner hole of the plug assembly within the main body's water inlet hole, between the upper and lower through holes. The upper spring piece is fixed to the main body's water inlet hole by the plug assembly. The inner wall of the main body's water inlet hole has a guide groove 101. The main body's water inlet hole is conical, and the corresponding upper spring piece is conical. The main body's lower through hole remains open. When the upper through hole of the main body is moved inward by a wrench-driven piston, the lower spring piece controls the opening or closing of the main body's water inlet hole through pressure changes. Simultaneously, the upper spring piece deforms through pressure changes to open or close the main body's upper through hole. The upper spring piece includes a spring plug 3 and a spring cover 2. One end of the spring cover's bottom is sealed and engaged with one end of the spring plug's cylindrical portion. The spring cover's opening is integrated with the other end of the spring plug's head. The diameter of the cylindrical end is larger than the diameter of the other end of the spring cover's cylinder. The height of the spring plug's cylindrical portion is smaller than the height of the spring cover's cylinder. The spring plug has an internal cylindrical cavity. The spring cover is located at the main body's upper through hole. The bottom of the upper spring plug is provided with a raised cross rib, and the lower spring is a plastic sheet 4 or a lower spring sleeve. The plastic sheet in the top inner hole of the plug assembly floats up and down through the gap at the bottom of the cross rib.

[0019] The plug assembly has a notch 501 on one side of the top opening of the inner hole, which is aligned with the lower through hole in the main body. The outer diameter of the plug assembly has a raised sealing ring 502. One side of the platform above the sealing ring has an air hole, and the other side has an inner hole. The inner hole protrudes upward and downward respectively. The top edge of the platform has a raised buckle. The plug assembly is fixed to the inner groove of the water inlet of the main body by the buckle. The air hole of the plug assembly is located in the cavity below the connecting rib of the main body.

[0020] In use, pressing the wrench moves the piston into the piston chamber of the main body via the connecting piece. Simultaneously, the rubber sleeve deforms, keeping the lower through-hole of the main body open. As the piston moves inward through the upper through-hole, the lower spring, under pressure change, closes the main body's water inlet. At the same time, the upper spring deforms under pressure within the piston chamber, opening the flow between the upper through-hole and the internal channel, finally atomizing and spraying out from the cap. Releasing the wrench resets the rubber sleeve and pushes the connecting piece, piston, and handle back to their original positions. The upper spring deforms under pressure within the piston chamber, closing the flow between the upper through-hole and the internal channel. The lower spring draws upward inward, opening the main body's water inlet, allowing liquid to enter the main body through the stopper assembly.

Claims

1. An improved all-plastic micro spray gun, wherein the main body (1) and internal channels of the all-plastic micro spray gun are L-shaped, the water outlet of the main body is provided with a cap (11), the upper and lower ends of the piston chamber of the water inlet of the main body are respectively provided with an upper through hole and a lower through hole, the outer diameter of the main body is provided with a cover (12), the inner groove of the water inlet of the main body is provided with a plug kit (5), the inner hole of the plug kit is provided with a suction tube, the outer diameter of the water inlet of the main body outside the plug kit is provided with a large circle (6), the piston cylinder of the wrench (10) of the main body is provided with a piston chamber, the piston chamber of the main body is provided with a piston component (7), one end of the piston component is fitted into the piston chamber of the main body, the sealing leaf of the outer diameter of the piston end abuts and seals with the inner diameter of the piston chamber of the main body, the other end of the piston component is engaged with the inner side of the wrench through a connector (9), and one end of the wrench is fixed to the pins on both sides of the outer diameter of the water outlet of the main body; characterized in that The piston cavity of the main body (1) is provided with a rubber sleeve (8) on the outer diameter of the cavity opening. One end of the rubber sleeve is fitted into the outer diameter of the piston cavity of the main body. The other end of the rubber sleeve, the column sleeve (801) which narrows towards the middle, protrudes towards the wrench side. One end of the connector (9) is connected to the column groove (701) on the top of the piston in the main body through the column sleeve of the rubber sleeve. The other end of the connector extends out and is fastened to the sleeve opening of the column sleeve of the rubber sleeve and is fastened to the inside of the wrench.

2. The improved all-plastic micro spray gun according to claim 1, characterized in that... The inner hole of the plug assembly (5) is provided with a fixed or movable lower spring. The upper spring is provided above the inner hole of the plug assembly in the main body water inlet between the upper and lower through holes. The upper spring is fixed to the water inlet of the main body by the plug assembly. The inner wall of the water inlet of the main body is provided with a guide groove (101). The water inlet of the main body is conical, and the corresponding upper spring is conical. The lower through hole of the main body is kept open. When the upper through hole of the main body is driven by the wrench (10) to move the piston (7) inward, the lower spring controls the opening or closing of the water inlet of the main body by pressure change. At the same time, the upper spring deforms by pressure change to open or close the upper through hole of the main body.

3. The improved all-plastic micro spray gun according to claim 2, characterized in that... The upper spring component includes a spring plug (3) and a spring cover (2). One end of the spring cover is sealed and fastened to one end of the spring plug. The opening of the spring cover is connected to the other end of the spring plug. The diameter of the cylindrical end is larger than the diameter of the other end of the spring cover. The height of the spring plug is smaller than the height of the spring cover. The spring plug has a cylindrical cavity inside. The spring cover is located at the upper through hole of the main body (1).

4. The improved all-plastic micro spray gun according to claim 3, characterized in that... The bottom of the upper spring plug (3) is provided with a protruding cross rib, and the lower spring is a plastic sheet (4) or a lower spring sleeve. The plastic sheet in the top inner hole of the plug assembly (5) floats up and down through the gap at the bottom of the cross rib.

5. The improved all-plastic micro spray gun according to claim 1, characterized in that... The plug assembly (5) has a notch (501) on one side of the top opening of the inner hole, which is aligned with the lower through hole in the main body (1).

6. The improved all-plastic micro spray gun according to claim 1, characterized in that... The outer diameter of the plug assembly (5) is provided with a raised sealing ring (502). The platform above the sealing ring has an air hole on one side and an inner hole on the other side. The inner holes are raised upward and downward respectively. The top edge of the platform is provided with a raised buckle. The plug assembly is fixed to the inner groove of the water inlet of the main body (1) by the buckle. The air hole of the plug assembly is located in the cavity below the connecting rib of the main body.

Images