Integral bottom plug no-wash paint canister
The integrated bottom stopper design of the paint sprayer solves the problems of negative pressure and impurities entering the paint sprayer, ensuring smooth paint application and equipment durability.
Patent Information
- Application Number
- CN202522654757.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-15
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-12-15
AI Technical Summary
Existing paint sprayers are prone to negative pressure during use, which causes the sprayer body to dent or collapse, increases oil flow resistance, hinders the flow of coating medium, and makes it easier for external impurities to enter, affecting the spraying effect and safety.
An integrated bottom-stop, no-wash paint sprayer was designed, featuring an integrated structure of the sprayer body and base. The top is equipped with a vent and a knob assembly, which controls the opening and closing of the vent to prevent negative pressure formation and block impurities from entering.
It ensures a continuous and smooth output of paint, improves spraying efficiency, avoids the oil can body from being crushed and contaminated by impurities, and extends its service life.
Smart Images
Figure CN224926280U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the technical field of spray gun oil cans, specifically relating to an integrated bottom-stopper no-wash paint spray can. Background Technology
[0002] As a commonly used tool in painting operations, the spray gun has an oil can for storing paint, coatings and other painting media, which is a key component to ensure continuous operation of the spray gun.
[0003] Most existing paint sprayers have a closed structure. During spraying, as the paint inside the sprayer is consumed, the volume of the inner cavity gradually increases, and the air pressure decreases, creating a negative pressure state. This makes the sprayer prone to denting or collapsing, compromising its structural integrity. When the negative pressure inside the sprayer reaches a certain level, the external atmospheric pressure will exert pressure on the outer wall of the sprayer. If the sprayer is made of tough materials such as plastic, it is prone to inward denting or localized collapse. This denting or collapse not only damages the structural integrity of the sprayer, rendering it unusable, but may also injure operators, posing a safety hazard. Furthermore, when the paint inside the sprayer... When the negative pressure reaches a certain level, the oil outlet resistance increases, and the coating medium flows out poorly: the negative pressure state will significantly increase the flow resistance of the paint in the oil can, causing the paint to be unable to smoothly enter the spray gun through the oil hole, resulting in the phenomenon of spraying interruption; moreover, the instability of the oil outlet resistance will directly affect the atomization effect of the spray gun. When the resistance suddenly increases, the atomized particles of paint at the spray gun nozzle will become larger, resulting in a grainy texture and sagging on the surface coating of the workpiece; although some improved spray cans have vent holes, they do not have a dustproof structure. Dust, particles and other impurities in the outside air can easily enter the inner cavity of the oil can through the vent holes, and mix with the paint to form impurity particles. Utility Model Content This application provides an integrated bottom-stop no-wash paint sprayer to solve the problem that as the volume of the inner cavity of the oil can gradually increases, the air pressure decreases accordingly, forming a negative pressure state, the oil can body is prone to dents or crushing, the oil outlet resistance increases, and the coating medium does not flow smoothly.
[0004] The technical solution adopted in this application is as follows: An integrated, no-wash paint spray bottle with a bottom plug is attached to a paint spray gun. It includes: a paint bottle body and a paint bottle base; the paint bottle body is attached to the top of the paint bottle base; a bottom plug is attached to the bottom of the paint bottle base, and the paint bottle base and the bottom plug are integrated into one piece. The top of the oil bottle body has a vent hole, and a vent knob assembly is connected to the vent hole. The vent knob assembly includes a positioning seat and a knob switch. The positioning seat is connected to the top of the oil bottle body and surrounds the vent hole. The knob switch is rotatably connected to the positioning seat. The knob switch has a knob rod that can extend into the vent hole. The knob switch has a first locking state in which it rotates a preset angle relative to the positioning seat in a first direction, so that the knob rod extends into the vent hole to close the vent hole. It also has a second locking state in which it rotates a preset angle relative to the positioning seat in a second direction, so that the knob rod disengages from the vent hole at a preset height to open the vent hole.
[0005] The rotary switch includes a knob cap, a knob base, and a knob rod; the knob base is connected to the bottom of the knob cap, the knob rod is connected to the center of the bottom of the knob cap, and the knob base surrounds the outer periphery of the knob rod.
[0006] The button base has multiple openings and slots along its circumference that communicate with the inner cavity of the button base.
[0007] The top surface of the knob cap is provided with multiple radially arranged reinforcing ribs, which makes the top of the knob cap form multiple recessed cavities.
[0008] The inner side of the positioning seat has a spiral positioning groove; the outer side of the button seat is connected to a spiral threaded protrusion that mates with the positioning groove, so that the threaded protrusion can be screwed into the positioning groove.
[0009] A first stop is provided on the first side of the positioning groove along the circumferential direction, and a first protrusion is provided on the button seat corresponding to the first stop. The button seat rotates in the first direction so that the first protrusion abuts against and connects to the first stop, forming a first locking state.
[0010] A second stop is provided on the first side of the positioning groove along the circumferential direction, and a second protrusion is provided on the button seat corresponding to the second stop. The button seat rotates in the second direction so that the second protrusion abuts against and connects to the second stop, forming a second locking state.
[0011] The positioning seat has a first groove and a second groove; the button seat is connected to an elastic element and a buckle; when the button seat rotates along the positioning seat, the buckle is pressed to connect to the first groove to form a first locking state; when the button seat rotates along the positioning seat, the buckle is connected to the second groove to form a second locking state.
[0012] The oil can body has a conical structure; the radial dimension of the oil can body gradually decreases from the bottom to the top.
[0013] The preset angle range is 60~90°.
[0014] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows: 1. This application discloses an integrated bottom-plug self-cleaning paint sprayer for connection to a paint spray gun. The paint sprayer includes a can body and a base connected to the bottom of the can body. A bottom plug is connected to the bottom of the base. Traditionally, the bottom plug is inserted into the oil hole of the base. In this application, the bottom plug and the base are connected as an integrated structure, allowing direct connection between the base and the spray gun. A vent is provided on the top of the can body. The purpose of the vent is to allow external gas to enter the inner cavity of the can body during use, thereby creating air pressure on the paint and preventing the can body from collapsing inward or becoming locally crushed, thus preventing increased oil flow resistance and affecting the coating medium. Poor flow can lead to issues like paint flow interruptions and uneven atomization. This application addresses this by creating a vent hole, ensuring the internal air pressure of the paint can remains constant at atmospheric pressure. This allows the paint inside the can to flow smoothly through the spray gun without collapsing, resulting in continuous and efficient paint output and improved spraying efficiency. When the knob is open relative to the vent hole, a pre-set gap is created between the knob and the top surface of the vent hole. This gap allows the vent hole to connect to the outside while preventing dust, particles, and other impurities from entering the vent hole and contaminating the paint inside the can. This also prevents wear and tear on the paint can, thus extending its lifespan. Attached Figure Description
[0015] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the structure of an integrated bottom-stopper no-wash paint sprayer according to one embodiment of this application; Figure 2 This is a schematic diagram of the top structure of the oil can body of an integrated bottom-stopper no-wash paint sprayer according to one embodiment of this application; Figure 3 This is a schematic diagram of the vent knob assembly of an integrated bottom-stop no-wash paint sprayer according to one embodiment of this application; Figure 4 This is a partial structural diagram of the top of the oil can body of an integrated bottom-stop no-wash spray paint sprayer according to one embodiment of this application. In the picture, 1. Oil can body; 2. Vent hole; 3. Ventilation knob assembly; 31. Positioning seat; 32. Knob switch; 4. Knob cap; 5. Knob seat; 6. Knob rod; 7. Opening slot; 8. Cavity; 9. Threaded protrusion; 10. Conical part; 11. Through groove; 12. Positioning boss; 13. Positioning groove. Detailed Implementation
[0016] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.
[0017] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0018] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0019] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "a particular embodiment," "example," or "specific example," etc., indicate that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.
[0020] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.
[0021] This application relates to an integrated bottom-plug, no-wash paint spray bottle, which is connected to a paint spray gun, such as... Figures 1-4 As shown, the paint sprayer includes a paint can body 1 and a paint can base; the paint can body 1 is connected to the top of the paint can base; a bottom plug is connected to the bottom of the paint can base, and the paint can base and the bottom plug are integrated into one structure. The top of the oil bottle body 1 is provided with a vent hole 2, and a vent knob assembly 3 is correspondingly connected to the vent hole 2. The vent knob assembly 3 includes a positioning seat 31 and a knob switch 32. The positioning seat 31 is connected to the top of the oil bottle body 1 and surrounds the outer periphery of the vent hole 2. The knob switch 32 is rotatably connected to the positioning seat 31. The knob switch 32 has a knob rod 6 that can extend into the vent hole 2. The knob switch 32 has a first locking state in which it rotates a preset angle relative to the positioning seat 31 in a first direction, so that the knob rod 6 extends into the vent hole 2 to close the vent hole 2. It also has a second locking state in which it rotates a preset angle relative to the positioning seat 31 in a second direction, so that the knob rod 6 disengages from the vent hole 2 at a preset height to open the vent hole 2.
[0022] The positioning seat 31 of this application is connected to the outer periphery of the vent hole 2 and protrudes from the top surface of the oil bottle body 1. The knob switch 32 is rotatably connected to the positioning seat 31. The bottom of the knob switch 32 is connected to the knob rod 6. By rotating the knob switch 32 along the inside of the positioning seat 31, the knob rod 6 can move up and down relative to the top surface of the oil bottle body 1. When the knob rod 6 extends downward into the vent hole 2, it can block the vent hole 2, thereby preventing the vent hole 2 from communicating with the outside. At this time, the oil bottle body 1 is in a non-working state. When painting is required, the knob switch 32 is rotated relative to the positioning seat 31 in the second direction, so that the knob rod 6 can move upward until it is disengaged from the vent hole 2. The knob rod 6 can have a preset gap relative to the vent hole 2, so that the vent hole 2 is connected to the outside. The outside atmosphere can enter the inner cavity of the oil can body 1 through the vent hole 2, so that the inner cavity of the oil can body 1 is always the same as the atmospheric pressure, avoiding the phenomenon of the oil can body 1 being crushed, realizing the continuous and smooth output of paint, and improving the painting efficiency.
[0023] This application discloses an integrated bottom-plug, no-wash paint sprayer for connection to a paint spray gun. The paint sprayer includes a sprayer body 1 and a sprayer base connected to the bottom of the sprayer body 1. A bottom plug is connected to the bottom of the sprayer base. Traditionally, the bottom plug is inserted into an oil hole on the sprayer base. In this application, the bottom plug and the sprayer base are integrated into a single structure, allowing direct connection between the sprayer base and the spray gun. A vent 2 is provided on the top of the sprayer body 1. The purpose of the vent 2 is to allow external gas to enter the inner cavity of the sprayer body 1 during use, thereby creating air pressure on the paint and preventing the sprayer body 1 from collapsing inwards or becoming locally crushed. This prevents increased oil flow resistance, poor flow of the coating medium, and phenomena such as spray interruption and uneven atomization. This application utilizes the vent 2 to allow the oil... The air pressure inside the oil can body 1 is always the same as the atmospheric pressure, allowing the paint inside the oil can body 1 to be smoothly sprayed out through the spray gun without being crushed, thus achieving continuous and smooth paint output and improving the efficiency of paint spraying. Moreover, the vent knob assembly 3 of this application can move relative to the top of the oil can body 1, thereby driving the knob switch 32 to block or open relative to the vent hole 2. When the knob switch 32 is open relative to the vent hole 2, a preset gap is formed between the knob switch 32 and the top surface of the vent hole 2. The preset gap enables the vent hole 2 to communicate with the outside, and the knob switch 32 prevents external dust, particles and other impurities from entering the vent hole 2 and contaminating the paint inside the oil can body 1, avoiding wear between them and the oil can body 1, thereby improving the service life of the oil can body 1.
[0024] It should be noted that the material used for the oil can body 1 of this application can be high-density polyethylene, polypropylene, polyamide, polycarbonate, etc., and is not limited to the materials listed in this application.
[0025] In a preferred embodiment, the rotary switch 32 includes a knob cap 4, a knob base 5, and a knob rod 6; the knob base 5 is connected to the bottom of the knob cap 4, the knob rod 6 is connected to the center of the bottom of the knob cap 4, and the knob base 5 surrounds the outer periphery of the knob rod 6.
[0026] The bottom of the knob cap 4 is connected to the knob base 5. The height of the knob cap 4 is smaller than the height of the knob base 5. The two ends of the knob cap 4 in the radial direction can extend outwards from the two sides of the knob base 5 in the radial direction, making it easy to manually operate the knob. The knob base 5 is connected to the bottom of the knob cap 4 near the outer periphery. The knob base 5 has a cavity structure 8. The bottom center of the knob cap 4 is connected to the knob rod 6, so that when the knob base 5 rotates along the inner wall of the positioning seat 31, it can drive the knob rod 6 to move up and down.
[0027] In a preferred embodiment, the button base 5 has a plurality of openings 7 that communicate with the inner cavity of the button base 5 along the circumferential direction.
[0028] In the scheme of this application, the button seat 5 is provided with at least two opening slots 7 along the circumference. The purpose of providing the opening slots 7 is to enable the vent 2 to be connected to the outside atmosphere through the inner cavity of the button seat 5 and the opening slots 7, thereby facilitating the smooth passage of gas through the vent 2 into the oil can body 1.
[0029] In a preferred embodiment, the top surface of the knob cap 4 is provided with a plurality of radially arranged reinforcing ribs, so that the top of the knob cap 4 forms a plurality of recessed cavities 8.
[0030] By setting reinforcing ribs, multiple recessed cavities 8 are formed on the top of the knob cap 4, which allows the operator to manually press the cavities 8, increasing the contact area and friction between them and the knob cap 4, making it easier to rotate the knob cap 4 and quickly switch between the closed and open states of the vent 2.
[0031] In a preferred embodiment, the inner side of the positioning seat 31 is formed with a spiral positioning groove; the outer side of the button seat 5 is connected with a spiral threaded protrusion 9 that cooperates with the positioning groove, so that the threaded protrusion 9 can be screwed into the positioning groove 13.
[0032] The positioning seat 31 has a positioning groove 13 on its inner side and a threaded protrusion 9 on its outer side. The positioning seat 31 is rotatably connected to the button seat 5 through the cooperation of the threaded protrusion 9 and the positioning groove.
[0033] In a preferred embodiment, a first stop is provided on the first side of the positioning groove along the circumferential direction, and a first protrusion is provided on the button seat 5 corresponding to the first stop. The button seat 5 rotates in the first direction so that the first protrusion abuts against and connects to the first stop, forming a first locking state.
[0034] Furthermore, a second stop is provided on the first side of the positioning groove along the circumferential direction, and a second protrusion is provided on the button seat 5 corresponding to the second stop. The button seat 5 rotates in the second direction so that the second protrusion abuts against and connects to the second stop, forming a second locking state.
[0035] In one embodiment of positioning the positioning seat 31 and the button seat 5, a first stop is connected to the first side of the positioning groove, and a second stop is connected to the second side of the positioning groove. The first stop and the second stop are at a 90-degree angle. The button seat 5 rotates in the first direction so that the first protrusion of the button seat 5 abuts against the first stop, thereby realizing the first locking state of the connection between the button seat 5 and the positioning seat 31. At this time, the knob rod 6 can be inserted into the vent hole 2 to close the vent hole 2. Conversely, the button seat 5 rotates in the second direction so that the second protrusion of the button seat 5 abuts against the second stop, thereby realizing the second locking state of the connection between the button seat 5 and the positioning seat 31. At this time, the knob rod 6 can disengage from the vent hole 2 to open the vent hole 2.
[0036] In a preferred embodiment, the positioning seat 31 has a first groove and a second groove; the button seat 5 is connected to an elastic element and a buckle; when the button seat 5 rotates within the positioning seat 31, the buckle is pressed to connect to the first groove to form a first locking state; when the button seat 5 rotates within the positioning seat 31, the buckle is connected to the second groove to form a second locking state.
[0037] Preferably, the included angle between the first groove and the second groove of the positioning seat 31 is set at 90 degrees. Since the button seat 5 has an opening groove 7, preferably four opening grooves 7 are used, so that the button seat 5 forms four independent button pieces. There is an opening groove 7 between two adjacent button pieces. An elastic element is connected between two connected button pieces. A buckle is connected to the elastic element. The buckle can be inserted into the first groove and the second groove, thereby forming a locking connection between the button seat 5 and the positioning seat 31. In the initial state, the buckle is located in the first groove, forming the first locking state between the button seat 5 and the positioning seat 31. When it is necessary to rotate the button seat 5 along the positioning seat 31, the buckle is pressed manually. Under the action of the elastic element, the buckle moves inward. Then the button seat 5 is rotated. When the buckle moves to the second groove, under the action of the elastic element, the buckle engages in the second groove, thereby forming the second locking state between the button seat 5 and the positioning seat 31.
[0038] In a preferred embodiment, the oil can body 1 has a conical structure; the radial dimension of the oil can body 1 gradually decreases from the bottom to the top.
[0039] As a preferred embodiment, the preset angle range is 60~90°.
[0040] Furthermore, an annular protrusion is connected to the bottom periphery of the oil can body 1, and a thread is connected to the annular protrusion, which is connected to the threaded groove of the oil can base through the thread.
[0041] In this application, the rotary switch 32 includes a knob cap 4 and a knob rod 6. The knob rod 6 is connected to the side of the knob cap 4 facing the oil can body 1. The knob rod 6 is used to block or open the vent hole 2. During the use of the oil can body 1, the knob rod 6 is pulled out of the vent hole 2 by rotating the knob cap 4. The knob rod 6 is separated from the vent hole 2 by a preset gap, which can ensure that the oil can body 1 is connected to the outside atmosphere and that the oil can body 1 will not be crushed due to low internal air pressure, so that the paint can be sprayed smoothly from the spray gun. It can also prevent external dust and other impurities from entering the vent hole 2 under the blocking effect of the knob cap 4, so as to ensure the quality of the paint.
[0042] When the oil can body 1 is not needed to work, the knob rod 6 is inserted into the vent hole 2 by rotating the knob cap 4. When the oil can body 1 needs to work, the knob rod 6 can move upward by rotating the knob cap 4 in another direction. When the knob seat 5 is connected to the positioning seat 31 to form a second locking state, the knob rod 6 can maintain the preset gap between itself and the vent hole 2.
[0043] The oil can body 1 has a conical structure. The radial dimension of the oil can body 1 gradually decreases from the bottom to the top. A conical part 10 is connected to the top of the oil can body 1. The conical part 10 is a ring-shaped protrusion connected to the circumference of the oil can body 1, so that the top of the oil can body 1 has an inwardly recessed positioning end face.
[0044] In this application, a conical portion 10 is provided on the top of the oil can body 1, and the conical portion 10 is protruded on the top surface of the oil can body 1, so that the top surface of the oil can body 1 forms an inwardly recessed positioning end face, thereby forming an installation position for the vent knob assembly 3, which plays a role in protecting the vent knob assembly 3. Moreover, by providing the protruding conical portion 10, it is also convenient for the staff to hold the conical portion 10 to install and position the oil can body 1.
[0045] Multiple through slots 11 are provided on the periphery of the conical portion 10.
[0046] In this application, the purpose of providing multiple through slots 11 on the periphery of the conical part 10 is to facilitate the storage of the conical part 10. The through slots 11 can be matched with the positioning parts to fix the conical part 10 to the positioning parts, making the conical part 10 easy to store and preventing it from easily tilting. Furthermore, by providing multiple through slots 11, it is also beneficial to allow water to flow out through the multiple through slots 11 when there is water accumulation on the top surface of the oil can body 1, thus avoiding long-term water retention.
[0047] A positioning boss 12 protruding from the positioning end face is connected above the vent hole 2. The inner cavity of the positioning boss 12 is connected to the vent hole 2, forming an insertion channel for the knob rod 6 to be inserted into the vent hole 2.
[0048] The insertion channel has a conical structure. The radial dimension of the insertion channel gradually increases from the side facing the oil can body 1 to the side away from the oil can body 1, so that the outward opening of the insertion channel forms a conical structure surface, which is conducive to the insertion of the knob rod 6 into the vent hole 2.
[0049] In this application, a positioning boss protruding above the vent hole 2 is connected. The positioning boss is higher than the top surface of the vent hole 2 by a preset height, and at the same time forms a barrier around the vent hole 2 to further prevent external dust or particulate matter and other impurities from entering the vent hole 2. Moreover, the knob rod 6 can be inserted into the vent hole 2 through the positioning boss, thereby forming an insertion channel for the knob rod 6. The setting of the insertion channel further enhances the contact area between the vent hole 2 and the knob rod 6, thereby further improving the connection sealing and connection strength.
[0050] For any parts not mentioned in this application, existing technologies may be used or referenced.
[0051] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.
[0052] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.
Claims
1. An integrated bottom-stop, no-wash paint spray bottle, connected to a paint spray gun, characterized in that... include: The oil can body and the oil can base; The oil can body is connected to the top of the oil can base; the bottom of the oil can base is connected to a bottom plug, and the oil can base and the bottom plug are integrated into one piece. The top of the oil bottle body has a vent hole, and a vent knob assembly is connected to the vent hole. The vent knob assembly includes a positioning seat and a knob switch. The positioning seat is connected to the top of the oil bottle body and surrounds the vent hole. The knob switch is rotatably connected to the positioning seat. The knob switch has a knob rod that can extend into the vent hole. The knob switch has a first locking state in which it rotates a preset angle relative to the positioning seat in a first direction, so that the knob rod extends into the vent hole to close the vent hole. It also has a second locking state in which it rotates a preset angle relative to the positioning seat in a second direction, so that the knob rod disengages from the vent hole at a preset height to open the vent hole.
2. The one-piece bottom-stop no-wash paint sprayer according to claim 1, characterized in that, The rotary switch includes a knob cap, a knob base, and a knob rod; the knob base is connected to the bottom of the knob cap, the knob rod is connected to the center of the bottom of the knob cap, and the knob base surrounds the outer periphery of the knob rod.
3. The one-piece bottom-stopper no-wash paint sprayer according to claim 2, characterized in that, The button base has multiple openings and slots along its circumference that communicate with the inner cavity of the button base.
4. The one-piece bottom-stopper no-wash paint sprayer according to claim 2, characterized in that, The top surface of the knob cap is provided with multiple radially arranged reinforcing ribs, which makes the top of the knob cap form multiple recessed cavities.
5. The one-piece bottom-stopper no-wash paint sprayer according to claim 3, characterized in that, The inner side of the positioning seat has a spiral positioning groove; the outer side of the button seat is connected to a spiral threaded protrusion that mates with the positioning groove, so that the threaded protrusion can be screwed into the positioning groove.
6. The one-piece bottom-stop no-wash paint sprayer according to claim 5, characterized in that, A first stop is provided on the first side of the positioning groove along the circumferential direction, and a first protrusion is provided on the button seat corresponding to the first stop. The button seat rotates in the first direction so that the first protrusion abuts against and connects to the first stop, forming a first locking state.
7. The one-piece bottom-stopper no-wash paint sprayer according to claim 6, characterized in that, A second stop is provided on the first side of the positioning groove along the circumferential direction, and a second protrusion is provided on the button seat corresponding to the second stop. The button seat rotates in the second direction so that the second protrusion abuts against and connects to the second stop, forming a second locking state.
8. The one-piece bottom-stopper no-wash paint sprayer according to claim 5, characterized in that, The positioning seat has a first groove and a second groove; the button seat is connected to an elastic element and a buckle; when the button seat rotates along the positioning seat, the buckle is pressed to connect to the first groove to form a first locking state; when the button seat rotates along the positioning seat, the buckle is connected to the second groove to form a second locking state.
9. The one-piece bottom-stop no-wash paint sprayer according to claim 1, characterized in that, The oil can body has a conical structure; the radial dimension of the oil can body gradually decreases from the bottom to the top.
10. The one-piece bottom-stop no-wash paint sprayer according to claim 1, characterized in that, The preset angle range is 60~90°.