Cup cover of fluid supply cup and fluid supply device

Abstract

The utility model provides a fluid supply cup lid and fluid supplier, including the lid body of one end is the liquid inlet, the other end is the liquid outlet, the side wall of lid body extends from the liquid inlet to the liquid outlet, the corresponding part of liquid inlet is used for being connected with the fluid supply cup body, the side wall extends at the liquid inlet to form the barrel-shaped wall, and the barrel-shaped wall is connected with the fluid supply cup body. The extension surface of the barrel-shaped wall is parallel to the axis of the liquid inlet to form a parallel flow guide direction; an included angle is formed between the extending surface of the side wall between the liquid inlet and the liquid outlet and the axis of the liquid outlet, and the extending surface of the side wall forms an inclined flow guide direction, and is characterized in that a filter is arranged on the cup cover, a filtering area parallel to the flow guide direction and perpendicular to the filter is arranged on the liquid inlet side of the filter, and a filtering area parallel to the flow guide direction and perpendicular to the filter is arranged on the liquid outlet side of the filter. An included angle is formed between the inclined diversion direction and the filter area of the filter. According to the utility model, the maximum gravity decomposition force is obtained along the flow guide direction, the paint can overcome the resistance of the filter screen conveniently, the paint passing through the filter screen keeps a certain flow rate, and the liquid supply amount is ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to spraying equipment technical field relates to a spray cup especially fluid supply cup's cup cover and fluid supply. BACKGROUND

[0002] Liquid supply device generally refers to spray cup, and the spray cup is used for storing paint, and the spray cup is connected with a spray gun to spray the paint in the spray cup when used. There are mainly two kinds of spray cups on the market: one is composed of a cup body and a cup cover. The other is composed of a rigid outer cup, an inner liner and a cup cover. The inner liner needs to be placed in the rigid outer cup, and the inner liner and the rigid outer cup are covered by the cup cover to fix the rigid outer cup, the inner liner and the cup cover as an integrated structure, and then connected with the spray gun.

[0003] For example, a liquid supply and filter assembly is disclosed in Chinese patent document CN101060935A, which comprises: a cover member comprising a first end adapted to connect to a reservoir capable of containing one or more liquids, a second end opposite the first end, an inner surface and an outer surface both extending from the first end to the second end, and an opening extending through a portion of the cover member from the first end to the second end; and a first detachably connected filter member connected to the inner surface of the cover member, the first detachably connected filter member comprising a first screen and a first screen tab extending from the first screen.

[0004] In the above technical solution, the cover comprises a conical outer surface and a cylindrical lower part, the large-diameter port of the conical outer surface is connected with the cylindrical lower part, and the filter screen is arranged inside the conical outer surface according to the drawings. Therefore, the diameter of the filter screen is smaller than the diameter of the cylindrical lower part, so that the filtering area is limited, the internal space of the cover cannot be fully utilized to form the maximum filtering area, the filtering efficiency is affected, and the liquid supply rate is reduced.

[0005] On the other hand, in the paint spraying operation, the cup cover is usually vertically inverted or slightly inclined to the spraying cup, and the paint in the spraying cup flows through the filter component under the action of gravity. The filter component is arranged to filter and block the paint, and the force value of the paint flowing through the filter area is equal to the decomposition force of the gravity of the paint in the flow direction. In the prior art, the filter component is arranged in the conical inner part, and the inner surface of the conical part is a converging structure with gradually decreasing diameter. Under the guidance of the cylinder wall of the cone, the inclined flow direction forms an acute angle with the filter area. Obviously, there is a large angle between the inclined flow direction and the direction of the vertical gravity, so that most of the gravity is blocked by the inner surface of the cone, and most of the gravity is weakened, only a small part of the gravity forms a decomposition force to drive the paint to flow through the filter component, which obviously reduces the power and flow rate of the paint flowing through the filter component. Therefore, the paint is prone to hanging and stagnation, which causes the filter component to be gradually blocked, affecting the supply rate of the paint and shortening the service life of the filter.

[0006] Furthermore, the filter component is arranged in the conical inner part, and a protruding part for mounting the filter component must be arranged on the inclined inner surface of the cone, thereby increasing the complexity of the structure of the inner surface of the cone, increasing the difficulty of mold opening, and increasing the shrinkage problem of the injection molding of the conical surface, thereby reducing the quality of the finished product. The complex conical inner surface structure forms resistance to the flow of paint, reduces the supply rate of the paint, and affects the spraying effect. Moreover, the complex conical inner surface structure also increases the overall weight of the cover and increases the material cost.

[0007] Furthermore, in order to provide the mounting structure of the filter component, a ring-shaped rib structure is protruded on the inner surface of the cone in the existing cover structure, and the ring-shaped rib structure and the inner surface of the cone form an annular gap. When the cover is inverted for liquid supply, the paint flows into the annular gap and is stagnant, which cannot be normally output. Since the cost of some paint is high, the waste of paint is caused. In addition, after replacing the inner liner and the paint, the residual paint in the annular gap is mixed with the new paint, which causes the old paint to contaminate the new paint, affecting the spraying quality and effect. The utility model discloses a cup cover of fluid supply cup and fluid supply device.

[0008] The utility model discloses a cup cover of fluid supply cup and fluid supply device.

[0009] The cup cover of the fluid supply cup can be realized by the following technical scheme: a cup cover of a fluid supply cup, comprising a cover body with a liquid inlet at one end and a liquid outlet at the other end, a side wall of the cover body extending from the liquid inlet to the liquid outlet, a corresponding part of the liquid inlet being used for connecting with a cup body of the fluid supply cup, the side wall extending at the liquid inlet to form a barrel-shaped wall, and a filter being arranged on the cup cover; an annular structure capable of being used as a base for pasting or pressing a filter screen is arranged on the side wall, and a spacing space exists between the annular structure and the barrel-shaped wall, and a corresponding part of a framework of the filter fills the spacing space.

[0010] Preferably, the annular structure is any one of an annular protruding rib, an annular platform or an annular pressing region.

[0011] Preferably, the framework is a ring-shaped frame, and a filter screen is arranged in the inside of the frame; one side surface of the frame has an annular boss which is consistent in shape with the spacing space, and the annular boss is embedded in the spacing space.

[0012] Preferably, a protruding rib one is arranged on an inner wall of the barrel-shaped wall, the protruding rib one protrudes towards an axis direction of the liquid inlet, an inner wall of the barrel-shaped wall between the protruding rib one and the liquid inlet forms a mounting guide surface, and a contour edge of the framework forms an interference fit along the mounting guide surface and through the protruding rib one.

[0013] Preferably, a plurality of protruding blocks are arranged on the inner wall of the barrel-shaped wall, the plurality of protruding blocks are arranged on a same circumferential line, an inner wall of the barrel-shaped wall between the circumferential line and the liquid inlet forms a mounting guide surface, and a contour edge of the framework forms an interference fit along the mounting guide surface and through the protruding blocks.

[0014] Preferably, a protruding rib two is arranged on a contour of the framework, a corresponding part of the inner wall of the barrel-shaped wall is provided with a groove, an inner wall of the barrel-shaped wall between the groove and the liquid inlet forms a mounting guide surface, and the protruding rib two is embedded in the groove along the mounting guide surface to form a clamping fit.

[0015] Preferably, a filter screen is arranged on the annular structure, and the filter screen covers an inner circumferential region enclosed by the annular structure.

[0016] A cup cover of a fluid supply cup, comprising a cover body with an inlet end and an outlet end, a side wall of the cover body extending from the inlet end to the outlet end, a corresponding part of the inlet end being used to connect with a cup body of the fluid supply cup, the side wall extending at the inlet end to form a barrel-shaped wall, an extending surface of the barrel-shaped wall being parallel to an axis of the inlet end to form a parallel flow direction, the extending surface of the side wall between the inlet end and the outlet end being arranged at an angle with the axis of the outlet end, the extending surface of the side wall forming an inclined flow direction, a filter being arranged on the cup cover, on an inlet side of the filter, the parallel flow direction being perpendicular to a filtering area of the filter, on an outlet side of the filter, the inclined flow direction being at an angle with the filtering area of the filter.

[0017] Preferably, an annular structure capable of serving as a base for sticking or pressing a filter screen is arranged on the side wall, a spacing space being present between the annular structure and the barrel-shaped wall, a corresponding part of a skeleton of the filter filling the spacing space.

[0018] A fluid supply device, comprising a spray cup and the cup cover described above, the spray cup comprising an inner liner and a rigid outer cup, the inner liner being received in the rigid outer cup, a plurality of locking grooves being arranged on a cup opening of the rigid outer cup, a plurality of clamping elements being correspondingly arranged on an outer edge of the cover body, the barrel-shaped wall extending into the inner liner to form a closure, the clamping elements being capable of being introduced into the corresponding locking grooves to connect the rigid outer cup with the cover body.

[0019] Compared with the prior art, the cup cover of the fluid supply cup and the fluid supply device have the following beneficial effects:

[0020] 1. The filter is arranged in the area surrounded by the barrel-shaped wall, ensuring the maximum filtering area, facilitating the increase of the amount of filtered fluid in a unit time, ensuring the sufficient supply of sprayed paint, and optimizing the spraying efficiency and effect. At the same time, the side wall can maintain a simple and smooth surface structure, simplifying the step-by-step mold opening step, avoiding the shrinkage problem in the injection molding process. The simple side wall reduces the weight of the cover body, saves materials, and reduces production costs. Moreover, the smooth inner wall of the side wall is beneficial to the smooth flow of paint, promotes the falling speed of paint, and is beneficial to the spraying efficiency. On the other hand, the barrel-shaped wall provides sufficient introduction stroke, and the user can conveniently and stably apply force when installing the filter, ensuring quick, convenient and accurate installation of the filter, and optimizing the assembly feel.

[0021] 2. The filter is arranged with a flow direction perpendicular to the filtering area on the inlet side of the filter, so as to ensure that the maximum gravitational resolution force is obtained along the flow direction in the inverted liquid supply state, and the remaining liquid paint can pass through the filter screen smoothly under the premise that the filter blocks large particles, and the liquid paint passing through the filter screen still maintains a certain flow rate, thereby ensuring the liquid supply amount and the liquid supply speed; thus, effective impurity filtration can be realized, the filtering resistance can be prevented from affecting the passing rate and the flow rate of the paint, the problem that the paint is retained and hung on the screen due to insufficient power, thereby causing the mesh to be blocked and reducing the flow and the flow rate, the service life of the filter can be prolonged, and the waste and pollution of the paint due to retention can be reduced.

[0022] 3. Since the pressure screen mode needs to be provided with a rib structure, a spacing space is inevitably formed between the rib structure and the inner wall of the cover body, paint flows to the spacing space when the cover body is inverted to supply liquid, and retention occurs, the skeleton of the filter is fitted into the spacing space for sealing and filling, the spacing space is filled to eliminate the paint storage space, so as to eliminate the waste and pollution caused by the paint storage phenomenon. In addition, the filter is axially positioned by the fitting of the groove space and the skeleton, and the annular structure supports the filter to form an inner ring, so as to ensure the installation and fixation of the filter and prevent the deformation of the filter, and provide a comprehensive and stable filtering effect.

[0023] 4. The filter and the cover body are detachably connected in multiple clamping modes, the flexibility and the implementation scheme of assembly are expanded, and a disassembly force applying part (pull tab) is further added, so that the disassembly operation is simple and convenient, the disassembly efficiency is greatly improved, and the disassembly experience of users is optimized.

[0024] 5. A plurality of installation filtering modes are provided, specifically, a pressure combined filter screen, an assembled filter, and a combination of the two, so as to cope with different customer needs, increase the flexibility and variability of application, enrich the use mode of the cover body, increase the utilization rate of the cover body, reduce the scrap cost, expand the application range of the market, and increase the competitiveness in similar products.

[0025] In summary, the above beneficial effects not only improve the performance and user experience of the product, but also provide a new idea for the paint flow effect of the filter design of the spray cup, and promote the technical progress in the related field. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a whole three-dimensional structure diagram of the first embodiment of the utility model.

[0027] Figure 2 It is a sectional three-dimensional structure diagram of the first embodiment of the utility model.

[0028] Figure 3 It is a local sectional enlarged structure diagram of the first embodiment of the utility model.

[0029] Figure 4 It is the overall stereogram of the cover body in the first embodiment of the utility model.

[0030] Figure 5 It is the sectional stereogram of the cover body in the first embodiment of the utility model.

[0031] Figure 6 It is the overall stereogram of the second embodiment of the utility model.

[0032] Figure 7 It is the sectional stereogram of the second embodiment of the utility model.

[0033] Figure 8 It is the sectional stereogram of the second embodiment of the utility model.

[0034] Figure 9 It is the overall stereogram of the cover body in the second embodiment of the utility model.

[0035] Figure 10 It is the overall stereogram of the third embodiment of the utility model.

[0036] Figure 11 It is the sectional stereogram of the third embodiment of the utility model.

[0037] Figure 12 It is the sectional stereogram of the third embodiment of the utility model.

[0038] Figure 13 It is the sectional stereogram of the cover body in the third embodiment of the utility model.

[0039] Figure 14 It is the overall stereogram of the filter in the utility model.

[0040] Figure 15 It is the use state structure diagram of the fluid supply device.

[0041] In the figure, 1, cover body; 1a, liquid outlet; 1b, side wall; 1c, barrel-shaped wall; 1d, liquid inlet; 2, filter; 2a, framework; 2b, annular boss; 2c, pull tab; 2d, filter screen; 3, annular structure; 4, spacing space; 5, installation leading-in surface; 6, convex rib one; 7, convex block; 8, convex rib two; 9, groove; 10, reinforcing rib; 11, rigid outer cup; 12, spray gun;

[0042] F1, parallel flow direction; F1' / F1'', inclined flow direction. DETAILED DESCRIPTION

[0043] The utility model discloses the specific embodiment of the utility model is as follows, and the technical scheme of the utility model is further described in conjunction with the drawings, but the utility model is not limited to these embodiments.

[0044] As Figures 1 to 14 As shown in the figure, the cup cover of the present fluid supply cup comprises a cover body 1 with a liquid inlet 1d at one end and a liquid outlet 1a at the other end, the side wall of the cover body 1 extends from the liquid inlet 1d to the liquid outlet 1a, the corresponding part of the liquid inlet 1d is used to connect with the cup body of the fluid supply cup, the side wall 1b extends to form a barrel-shaped wall 1c at the liquid inlet 1d, the extension surface of the barrel-shaped wall 1c is parallel to the axis of the liquid inlet 1d, forming a parallel flow direction; the extension surface of the side wall 1b between the liquid inlet 1d and the liquid outlet 1a is arranged at an angle with the axis of the liquid outlet 1a, and the extension surface of the side wall 1b forms an inclined flow direction; a filter 2 is arranged on the cup cover, on the liquid inlet side of the filter 2, the parallel flow direction is perpendicular to the filtering area of the filter 2, and on the liquid outlet side of the filter 2, the inclined flow direction forms an angle with the filtering area of the filter 2.

[0045] The side wall 1b can be a conical structure or a dome structure, and the extension surface of the conical structure is a tapered surface, and the extension surface of the dome structure is a plane where the tangent line of any point on the circular arc wall is located.

[0046] The filter 2 is arranged in the corresponding area of the barrel-shaped wall 1c instead of the corresponding area of the side wall 1b, so that the side wall 1b maintains a consistent and smooth transition of the conical wall surface, avoids setting a stepped structure to realize the installation of the filter 2, makes the structure of the side wall 1b relatively simple, eliminates the step-by-step mold opening operation required by the complex structure, and further improves the surface shrinkage problem; meanwhile, the smooth inner wall of the side wall 1b is beneficial to the collection and flow guiding effect of the paint, promotes the output speed of the paint, and is beneficial to the spraying efficiency; in addition, the simple structure of the cover body 1 reduces the mold development cost and the overall weight of the cover body 1, and saves the material cost. The large opening of the side wall 1b is the largest diameter position, and the rest positions are smaller than the diameter of the large opening; the diameter of the barrel-shaped wall 1c is equal to the diameter of the large opening of the side wall 1b; and the filter 2 is arranged in the corresponding area of the barrel-shaped wall 1c, so that the filtering area of the filter 2 is maximized, thereby increasing the amount of filtered liquid in a unit time and ensuring sufficient supply of sprayed paint, so as to optimize the spraying efficiency and effect.

[0047] Preferably, the side wall 1b is provided with an annular structure 3 which can be used as a base for pasting or pressing the filter screen, and the annular structure 3 is any one of an annular protruding rib, an annular platform or an annular pressing area.

[0048] The annular convex rib is a convex rib, the upper end surface of the annular convex rib can be in a ridge shape, the filter screen can be pressed on the annular convex rib by ultrasonic waves, or the filter screen can be directly adhered to the annular convex rib by an adhesive. The outer side wall of the annular convex rib is connected to the barrel-shaped wall 1c through the side wall 1b, and a ring-shaped recess formed between the outer side wall of the annular convex rib and the barrel-shaped wall 1c is the spacing space 4.

[0049] The annular platform has a plane parallel to the liquid inlet 1d, that is, the annular platform is connected to the side wall 1b through the inner side wall, and the outer edge of the plane of the annular platform is connected to the barrel-shaped wall 1c. The filter screen can be pressed on the plane by ultrasonic waves, or the filter screen can be directly adhered to the plane by an adhesive. The distance between the inner peripheral edge of the annular platform and the plane between the barrel-shaped wall 1c is the spacing space 4. After the filter screen is pressed, there is a certain gap between the edge of the filter screen and the barrel-shaped wall 1c, which can also be considered as the spacing space 4.

[0050] The side wall 1b is a smooth surface, and an annular pressing area is arranged on the smooth surface according to the contour of the filter screen, that is, the annular pressing area is not a fixed structure. Different specifications of filter screens can be directly fixed on the side wall 1b by ultrasonic waves, adhesives or other methods to form an annular connecting part. After the filter screen is pressed in the side wall 1b, a height difference is formed between the edge of the filter screen and the barrel-shaped wall 1c, and the annular space formed by the height difference can also be considered as the spacing space 4.

[0051] The annular structure 3 and the inner wall of the barrel-shaped wall 1c form the spacing space 4, the filter 2 includes a skeleton 2a and a filter screen 2d, and a detachable positioning structure is arranged between the skeleton 2a and the spacing space 4, that is, a screen clamping mode, the corresponding part of the skeleton 2a is embedded in the spacing space 4 to form a filled state, and the positioning structure forms an axial fixation.

[0052] Preferably, the skeleton 2a is a ring-shaped frame, and the filter screen 2d is arranged in a tensioned state in the inside of the frame; one side of the frame has a ring-shaped boss 2b matched with the shape of the spacing space, and the ring-shaped boss 2b is embedded in the spacing space 4. The ring-shaped boss 2b and the spacing space 4 are designed to have the same shape and the same specification, so that after installation, the ring-shaped boss 2b fills the spacing space 4 completely, and the outer peripheral contour of the frame is matched with the inner wall of the barrel-shaped wall 1c, thereby completely eliminating the installation gap and avoiding the paint from entering the spacing space 4 to form a stagnation.

[0053] As shown in Figures 1 to 5 A specific embodiment is that the positioning structure includes a convex rib one 6 arranged on the inner wall of the barrel-shaped wall 1c, the convex rib one 6 protrudes towards the axis of the liquid inlet 1d, that is, the convex rib one 6 is perpendicular to the axis of the liquid inlet 1d, the inner wall of the barrel-shaped wall 1c between the convex rib one 6 and the liquid inlet 1d forms a mounting guide surface 5, and the contour edge of the skeleton 2a passes through the convex rib one 6 along the mounting guide surface 5 to form an interference fit.

[0054] The barrel-shaped wall 1c of the cover body 1 is used for assembling and connecting a spray cup, so the barrel-shaped wall 1c needs to have a certain height to form an assembly matching surface, and the height of the barrel-shaped wall 1c creates a long enough installation lead-in stroke for the skeleton 2a of the filter 2 to provide stability during the installation lead-in process, ensuring that the installation is fast, convenient and accurate. When assembling, the skeleton 2a is inserted into the inside of the convex rib one 6 to form a clamping connection through the interference fit of the skeleton 2a and the convex rib one 6, and the annular boss 2b is embedded in the spacing space 4 in a matching state.

[0055] As shown in Figures 6 to 9 Another specific embodiment is that the positioning structure includes a plurality of convex blocks 7 arranged on the inner wall of the barrel-shaped wall 1c, and the plurality of convex blocks 7 are arranged on the same circumferential line perpendicular to the axis of the liquid inlet 1d. The installation lead-in surface 5 is formed by the inner wall of the barrel-shaped wall 1c between the circumferential line and the liquid inlet 1d, and the profile edge of the skeleton 2a forms an interference fit along the installation lead-in surface 5 through the convex blocks 7.

[0056] The barrel-shaped wall 1c of the cover body 1 is used for assembling and connecting a spray cup, so the barrel-shaped wall 1c needs to have a certain height to form an assembly matching surface, and the height of the barrel-shaped wall 1c creates a long enough installation lead-in stroke for the skeleton 2a of the filter 2 to provide stability during the installation lead-in process, ensuring that the installation is fast, convenient and accurate. The convex blocks 7 adopt a hemispherical surface structure, and the smooth transition of the skeleton 2a during disassembly and assembly is realized through the circular arc surface to facilitate operation. When assembling, the skeleton 2a is inserted into the inside of the plurality of convex blocks 7 to form a clamping connection through the interference fit of the skeleton 2a and the plurality of convex blocks 7, and the annular boss 2b is embedded in the spacing space 4 in a matching state.

[0057] As shown in Figures 10 to 13 Another specific embodiment is that the positioning structure includes a plurality of convex blocks 7 arranged on the inner wall of the barrel-shaped wall 1c, and the plurality of convex blocks 7 are arranged on the same circumferential line perpendicular to the axis of the liquid inlet 1d. The installation lead-in surface 5 is formed by the inner wall of the barrel-shaped wall 1c between the circumferential line and the liquid inlet 1d, and the profile edge of the skeleton 2a forms an interference fit along the installation lead-in surface 5 through the convex blocks 7.

[0058] The barrel-shaped wall 1c of the cover body 1 is used for assembling and connecting a spray cup, so the barrel-shaped wall 1c needs to have a certain height to form an assembly matching surface, and the height of the barrel-shaped wall 1c creates a long enough installation lead-in stroke for the skeleton 2a of the filter 2 to provide stability during the installation lead-in process, ensuring that the installation is fast, convenient and accurate. The convex blocks 7 adopt a hemispherical surface structure, and the smooth transition of the skeleton 2a during disassembly and assembly is realized through the circular arc surface to facilitate operation. When assembling, the skeleton 2a is inserted into the inside of the plurality of convex blocks 7 to form a clamping connection through the interference fit of the skeleton 2a and the plurality of convex blocks 7, and the annular boss 2b is embedded in the spacing space 4 in a matching state.

[0059] Another specific embodiment is that the positioning structure includes a convex rib three arranged on the outer side of the annular protrusion, the convex rib three protrudes in a direction away from the axis of the liquid inlet 1d, and a groove is arranged at the corresponding position of the inner side of the annular boss 2b. The inner wall of the barrel-shaped wall 1c forms a mounting guide surface 5, and the profile edge of the framework 2a enters the spacing space 4 along the mounting guide surface 5. The inner side of the annular boss 2b forms an interference fit through the convex rib three, until the convex rib three is embedded in the groove to form a clamping fit.

[0060] The barrel-shaped wall 1c of the cover body 1 is used to assemble and connect the spray cup. Therefore, the barrel-shaped wall 1c needs to have a certain height to form an assembly fit surface. At the same time, the height of the barrel-shaped wall 1c creates a long enough guide travel for the mounting guide surface 5, providing stability for the framework 2a of the filter 2 during the installation process, ensuring that the installation is fast, convenient and accurate. The convex rib three has a circular arc surface, and the groove has a circular arc groove wall. The smooth transition of the framework 2a during disassembly is achieved through the cooperation of the circular arc surface, to facilitate operation. During assembly, the convex rib three is first arranged in interference fit with the inner side of the annular boss 2b, until the convex rib three enters the groove to form a clamping fit, and at the same time, the annular boss 2b is embedded in the spacing space 4 in a kiss state.

[0061] As shown in Figure 14 , a further optimization scheme is that a pull tab 2c is arranged on the framework 2a. The pull tab 2c includes a connecting segment connected to the framework 2a, and a handheld portion connected to the end of the connecting segment. The framework 2a and the pull tab 2c can be integrally formed by injection molding. The thickness of the connecting segment is slightly thinner and the width is slightly narrower to form a soft characteristic. The handheld portion is usually in the shape of a circular sheet or an oval sheet to facilitate the fingers to hold. When the filter 2 needs to be disassembled after installation and use, only the pull tab 2c needs to be held and pulled outward from the liquid inlet 1d. The filter 2 is disassembled by the framework 2a overcoming the resistance of the positioning structure. The disassembly method is simple and easy to operate, and the disassembly efficiency is high.

[0062] Another specific embodiment is that a filter screen is arranged on the annular structure 3, and the filter screen covers the inner circumferential area enclosed by the annular structure 3. The filter screen can be fixed on the annular structure 3 by any one of the following ways: heat melting, ultrasonic wave, mechanical pressing, and adhesion. Among them, the way of combining the filter screen by heat melting, ultrasonic wave, and mechanical pressing, i.e. the way of pressing the screen, can reduce the height of the annular protrusion, so that the filter screen is flush with the inner wall of the side wall 1b after being fixed.

[0063] Both the filter screen and the filter 2 can be used alone to achieve the filtering effect of large particles in paint. The filter screen and the filter 2 can also be used in combination to form a double-layer filtering effect. When used in combination, the filter screen is first fixed on the annular structure 3, and then the filter 2 is clamped at the spacing space 4, i.e. the filter screen is located on the inner side and the filter 2 is located on the outer side, so that the arrangement of the filter screen does not hinder the disassembly and replacement of the filter 2.

[0064] As shown in Figure 4 , 5As shown in Figures 9 and 13, a further optimized solution is to provide a plurality of reinforcing ribs 10 on the inner wall of side wall 1b. One end of each rib 10 is connected to the annular rib or annular platform, and the other end of each rib 10 extends toward the center of liquid outlet 1a. The reinforcing ribs 10 enhance the support strength of the annular rib or annular platform, thereby ensuring the stability of the annular rib or annular platform in securing the filter screen. This also ensures the stability of the fit between the frame 2a of the filter 2 and the spacing space 4, further ensuring effective filtration and preventing paint gaps caused by extrusion deformation.

[0065] like Figures 1 to 14 As shown, another embodiment is a lid for a fluid supply cup, comprising a lid body 1 with a liquid inlet 1d at one end and a liquid outlet 1a at the other end. A sidewall 1b of the lid body 1 extends from the liquid inlet 1d toward the liquid outlet 1a. The portion corresponding to the liquid inlet 1d is used to connect with the body of the fluid supply cup. The sidewall 1b extends at the liquid inlet 1d to form a barrel-shaped wall 1c. A filter 2 is disposed on the lid. An annular structure 3 is provided on the sidewall 1b, which serves as a base for attaching or pressing a filter screen. A space 4 is defined between the annular structure 3 and the barrel-shaped wall 1c. The corresponding portion of the frame 2a of the filter 2 fills this space 4. This embodiment recombines the technical features of the above-mentioned solution, and the corresponding technical effects are similar to those of the above-mentioned solution, so it will not be repeated here.

[0066] like Figure 15 As shown, another specific embodiment is a fluid supply device including a spray cup and the aforementioned cup cover. The spray cup includes an inner liner and a rigid outer cup 11. The inner liner is received in the rigid outer cup 11. The rim of the rigid outer cup 11 is provided with a plurality of locking slots. The outer edge of the cover 1 is provided with a plurality of corresponding snap-fit ​​elements. The barrel-shaped wall 1c extends into the inner liner to form a seal. The snap-fit ​​elements can be inserted into the corresponding locking slots to connect the rigid outer cup 11 to the cover 1. The assembly structure of the cover 1 and the rigid outer cup 11 is not limited here. As long as the cover 1 can achieve a seal with the rigid outer cup 11, the whole set can be used.

[0067] The filter 2 is arranged in the corresponding area of ​​the barrel wall 1c rather than in the corresponding area of ​​the side wall 1b, so that the filter 2 and the liquid inlet 1d are completely connected by the barrel wall 1c, and the filter 2 and the liquid outlet 1a are mostly connected by the side wall 1b.

[0068] The liquid inlet 1d of the cup cover is assembled with the spray cup, and the liquid outlet 1a of the cup cover is assembled with the spray gun 12. In a normal spraying operation, the cup cover is vertically inverted or slightly inclined inverted with the spray cup, the paint in the spray cup flows through the filter 2 under the action of its own gravity, filters out larger particles in the paint, and then enters the spray gun 12 through the liquid outlet 1a for spraying. The filter 2 is arranged to filter and block the paint at the same time. The force value of the paint passing through the filtering area is equal to the decomposition force of the gravity of the paint in the flow direction. The gravity of the paint is constant, and the direction of the gravity is kept vertical downward. Because the spray cup and the barrel wall 1c are straight cylinder structures with consistent diameters, the parallel flow direction F1 is perpendicular to the filtering area under the guidance of the straight cylinder wall. Because the side wall 1b is a converging structure with gradually decreasing diameters, the inclined flow direction F1’ / F1” forms an acute angle with the filtering area under the guidance of the tapered cylinder wall.

[0069] In the spraying operation state, if the cup cover is vertically inverted with the spray cup, the parallel flow direction F1 of the barrel wall 1c is consistent with the direction of the liquid gravity G, that is, the power of the liquid passing through the filter 2d is equal to the gravity. In this state, the filtering driving force reaches the maximum value. The inclined flow direction F1’ / F1” of the side wall 1b has an inclined angle with the vertical direction. The decomposition force of the gravity along the inclined flow direction is the flow power of the liquid. Obviously, the decomposition force is smaller than the gravity.

[0070] In the spraying operation state, if the cup cover is slightly inclined inverted with the spray cup, the angle between the parallel flow direction F1 of the barrel wall 1c and the vertical direction is small, and the angle between the inclined flow direction F1’ / F1” of the side wall 1b and the vertical direction is large. The smaller the angle, the larger the corresponding gravity decomposition force. The larger the angle, the smaller the corresponding gravity decomposition force. That is, in the spraying state, the gravity decomposition force obtained by the parallel flow direction F1 is greater than the gravity decomposition force obtained by the inclined flow direction F1’ / F1”. Specifically, in the area surrounded by the barrel wall 1c, the parallel flow direction F1 is always perpendicular to the filtering area. In the area surrounded by the side wall 1b, the inclined angle between the inclined flow direction F1’ / F1” and the filtering area changes. The closer to the inner surface of the side wall 1b, the smaller the inclined angle, that is, the closer to the filtering surface in the inclined state. At this time, the obtained gravity decomposition force is the smallest, gradually transitions to the center of the inner circumferential area of the side wall 1b, and the inclined angle gradually increases. Only the center line of the filtering surface remains perpendicular, but the gravity decomposition force obtained in the remaining area is not the maximum value. Because the paint has a certain viscosity, the filter 2 is arranged in the area of the barrel wall 1c. The paint passes through the filtering area by using a larger gravity decomposition force, thereby reducing or avoiding the paint from being retained on the filtering area, so as to ensure the flow rate and prevent clogging.

[0071] On the other hand, the interval space 4 is filled by the cooperation of the filter 2 and the barrel-shaped wall 1c, so as to avoid the paint storage between the filter 2 and the barrel-shaped wall 1c, prevent the waste and loss of the paint; meanwhile, after the inner liner and the paint are replaced, the paint storage remained in the cup cover can not pollute the new paint, and the spraying quality and effect are affected.

[0072] The above-mentioned limitation of the filter 2 setting area and the cooperation mode realizes the smooth output of all the paint in the spraying cup, and prevents the waste caused by the paint remaining in the interval space 4, the filter screen 2d and other parts.

[0073] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or use similar ways to replace, but will not deviate from the spirit of the present application or exceed the defined range. Although the present application is illustrated and described in detail in the accompanying drawings and the foregoing description, such illustration and description are considered to be illustrative or exemplary rather than limiting. It should be understood that ordinary skilled persons can make changes and modifications within the scope of the following claims. Specifically, the present application covers additional embodiments having any combination of features from the above-mentioned different embodiments. In terms of the use of the expressions "generally" or "substantially", the present patent application should be understood to disclose the same full satisfaction of these features and values, i.e. without the aforementioned characterization as "generally" or "substantially".

[0074] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For ordinary skilled persons in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

Claims

1. A cup lid for a fluid supply cup, comprising a lid body having an inlet end and an outlet end, a side wall of the lid body extending from the inlet end to the outlet end, a portion of the inlet end configured to be coupled to a cup body of the fluid supply cup, the side wall forming a barrel wall at the inlet end, wherein, The cup cover is provided with a filter; the side wall is provided with an annular structure which can be used as a base for sticking or pressing a filter screen, and there is a spacing space between the annular structure and the barrel-shaped wall, and the corresponding part of the framework of the filter fills the spacing space.

2. The cup lid of the fluid supply cup according to claim 1, characterized in that, The annular structure is any one of an annular protrusion, an annular platform or an annular pressing area.

3. The cup lid of the fluid supply cup according to claim 1, wherein The framework is a ring-shaped frame, and the inside of the frame is provided with a filter screen; one side of the frame has a ring-shaped boss which is consistent in shape with the spacing space, and the ring-shaped boss is embedded in the spacing space.

4. The cup lid of the fluid supply cup of claim 1, wherein, A convex rib one is arranged on the inner wall of the barrel-shaped wall, the convex rib one protrudes towards the direction of the liquid inlet axis, the barrel-shaped wall inner wall between the convex rib one and the liquid inlet forms a mounting guide surface, and the contour edge of the framework forms an interference fit along the mounting guide surface and passes the convex rib one.

5. The cup lid of the fluid supply cup of claim 1, wherein, A plurality of convex blocks are arranged on the inner wall of the barrel-shaped wall, and the plurality of convex blocks are arranged on the same circumferential line, the barrel-shaped wall inner wall between the circumferential line and the liquid inlet forms a mounting guide surface, and the contour edge of the framework forms an interference fit along the mounting guide surface and passes the convex blocks.

6. The cup lid of the fluid supply cup of claim 1, wherein, A convex rib two is arranged on the contour of the framework, a groove is arranged at the corresponding position of the inner wall of the barrel-shaped wall, the barrel-shaped wall inner wall between the groove and the liquid inlet forms a mounting guide surface, and the convex rib two is embedded in the groove along the mounting guide surface to form a clamping fit.

7. The cup lid of the fluid supply cup of claim 1, wherein, A filter screen is arranged on the annular structure, and the filter screen covers the inner circumferential area enclosed by the annular structure.

8. A cup lid for a fluid supply cup, comprising a lid body having an inlet end and an outlet end, a side wall of the lid body extending from the inlet end to the outlet end, a portion of the inlet end configured to be coupled to a cup body of the fluid supply cup, the side wall extending at the inlet end to form a barrel wall, an extension of the barrel wall being parallel to an axis of the inlet end to define a parallel flow direction, an extension of the side wall between the inlet end and the outlet end being arranged at an angle to the axis of the outlet end to define an angled flow direction, characterized in that, The cup cover is provided with a filter, at the liquid inlet side of the filter, the parallel flow direction is perpendicular to the filtering area of the filter, and at the liquid outlet side of the filter, the inclined flow direction forms an angle with the filtering area of the filter.

9. The lid of a fluid supply cup according to claim 8, wherein, The side wall is provided with an annular structure which can be used as a base for sticking or pressing a filter screen, and there is a spacing space between the annular structure and the barrel-shaped wall, and the corresponding part of the framework of the filter fills the spacing space.

10. A fluid supply comprising a jet cup, characterized in that And a spray cup comprising the cup cover as claimed in any one of claims 1 to 9, the spray cup comprising an inner liner and a rigid outer cup, the inner liner being received in the rigid outer cup, a plurality of locking slots being arranged on the cup opening of the rigid outer cup, a plurality of clamping elements being correspondingly arranged on the outer edge of the cover body, the barrel-shaped wall extending into the inner liner to form a closure, and the clamping elements can be introduced into the corresponding locking slots to connect the rigid outer cup and the cover body.

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