Fluid supply cup and assembly method of fluid supply cup

Abstract

The invention provides a fluid supply cup and an assembling method of the fluid supply cup. The fluid supply cup comprises a cup cover, a lining and an outer cup, and the cup cover is matched with the outer cup and the lining; the outer cup is provided with a locking ring, the locking ring can rotate in the axial direction of the outer cup, the outer cup and the locking ring are assembled together, the locking ring is located at the locking position, and the locking ring, the cup cover, the lining and the outer cup are connected into a whole. When the locking ring is located at the assembly position, the cup cover can be separated from the opening end of the outer cup. The outer cup and the locking ring are in wedge fit and are integrally assembled through an anti-falling function; the locking structure and the releasing structure of the cup cover are matched through the locking ring, and assembling and separating of the cup cover and the locking ring are achieved. Therefore, after the cup cover is detached, the cup cover can be separated from the outer cup, and the locking ring is kept on the outer cup. The operation of dismounting the locking ring is omitted, and the replacement efficiency is improved; meanwhile, waste caused by discarding the locking ring is avoided, and the production cost is saved. The packet integration design makes the disassembly process more efficient and reduces waste.

Description

Technical Field

[0001] The invention belongs to the technical field of containers, and relates to a fluid storage device for a spray gun, in particular to a fluid supply cup and an assembly method of the fluid supply cup. Background Art

[0002] Currently, spray guns mainly use pneumatic methods to atomize paint for spraying, so paint needs to be supplied to the spray gun. The more common method is to connect a paint supply cup to the spray gun. This method can ensure that the supply cup and the spray gun move at the same time, and the paint is continuously pressed into the spray gun by gravity, and then sprayed out after being atomized by compressed gas.

[0003] A supply cup is composed of four parts: a rigid outer cup, a locking ring, an inner liner, and a cup cover. The cup cover needs to be covered with the inner liner, and then the inner liner is placed in the rigid outer cup. Finally, the cup cover and the rigid outer cup are locked and assembled into an integrated structure through the locking ring. The cup cover is provided with a liquid supply nozzle connected to the paint storage chamber of the inner liner, and a threaded structure is provided on the liquid supply nozzle, which forms a detachable connection with the liquid inlet of the spray gun through the threaded structure. Because the paint needs to be frequently replaced or replenished, when the paint is replaced, the inner liner, cup cover and other parts that contact the paint need to be discarded to avoid mixing of different paints and affecting the spraying quality.

[0004] For example, Chinese patent document 201780076581.9 discloses a reservoir system (50) for use with a spray gun (32). The system includes a cup receptacle (60) and a cover (62). The cover (62) includes a cover body (70) and a collar (68). The cover body (70) provides a nozzle (72) and a platform (250) around the nozzle (72). At least a portion of the platform (250) forms a partial spiral shape that rotates around the central axis of the nozzle (72). The collar (68) is rotatably connected to the cover body (70). In addition, the collar (68) includes a cover connector structure configured to connect the cover (62) to the cup receptacle (60). In some embodiments, the reservoir system (50) also includes one or more of a joint (54), a stopper (600) and a shaker core (700).

[0005] In the above technical solution, a plurality of flange retaining features are provided on the cover, and the plurality of flange retaining features are arranged on the same circumference. The locking ring is assembled by interference clamping through a circle of flange retaining features, that is, the locking ring is assembled on the cover in advance to form an integrated structure. During assembly, the liner and the cover are combined into one, and then the liner is placed in the cup holder, and the cover is closed and threadedly coupled to the cup holder through the clamping ring.

[0006] When the cover, liner and cup holder are separated, the clamping ring needs to be twisted to separate the cover, liner and cup holder. Since the clamping ring is assembled on the cover, it will remain on the cover after separation. If the cover, clamping ring and liner are thrown away together, the clamping ring will be wasted and the cost will be increased. If the clamping ring is to be kept for continued use, it is necessary to remove the clamping ring from the cover. Since the clamping ring is in a clamping installation due to interference fit, it is difficult to remove the clamping ring, which is time-consuming and laborious, and reduces the spraying operation experience. Summary of the invention

[0007] The purpose of the present invention is to solve the above problems in the prior art and to provide a fluid supply cup and an assembly method of the fluid supply cup.

[0008] The purpose of the present invention can be achieved by the following technical solutions:

[0009] A fluid supply cup comprising a cup cover having a fluid outlet, the fluid outlet being suitable for coupling the cup cover to a spraying device;

[0010] a liner having a flange that collapses when fluid contained within the liner is drawn from a fluid supply cup;

[0011] An outer cup having an open end, wherein the cup cover extends over the open end and the liner is received in the outer cup, the cup cover being adapted to fit the outer cup and the liner;

[0012] The outer cup can be connected to the locking ring, and the locking ring can rotate around the axial direction of the outer cup, and the outer cup and the locking ring are assembled together; the locking ring is in the locking position, and the locking ring, the cup cover, the liner and the outer cup are connected to form an integral body; the locking ring is in the assembly position, and the cup cover can be detached from the open end of the outer cup.

[0013] Preferably, an assembly block is provided on the locking ring, and a stroke assembly groove is provided at a corresponding position of the outer cup, the assembly block is adapted to the stroke assembly groove, the above-mentioned locking position is arranged in the stroke assembly groove, the above-mentioned assembly position is arranged in the stroke assembly groove or outside the stroke assembly groove, and the locking ring can move between the locking position and the assembly position of the stroke assembly groove.

[0014] Preferably, the travel assembly groove is located between the inlet and outlet and the locking end, and an anti-slip component is arranged between the travel assembly groove and the inlet and outlet, the anti-slip component forms an anti-slip stop for the assembly block located in the travel assembly groove, the assembly block cooperates with the locking end to form a locking position, and the assembly block cooperates with the anti-slip component to form an assembly position.

[0015] Preferably, the assembly block is a spiral wedge-shaped element arranged on the inner wall of the locking ring, the travel assembly groove is a spiral wedge-shaped groove arranged on the outer wall of the outer cup, the spiral wedge-shaped groove extends to the open end of the outer cup to form the inlet and outlet, the spiral wedge-shaped groove extends toward the bottom of the outer cup to the end groove wall to form the locking end, and the anti-slip part is a convex ridge separating the spiral wedge-shaped groove and the inlet and outlet; the spiral wedge-shaped element enters the inlet and outlet, is introduced into the spiral wedge groove to the end groove wall through the convex ridge, and forms a wedge-tight fit along the axial displacement of the outer cup.

[0016] Preferably, the assembly block is a spiral wedge-shaped element arranged on the inner wall of the locking ring, the travel assembly groove is a locking component arranged on the outer wall of the outer cup, the locking component includes a corresponding upper thread section and a lower thread section, the upper thread section and the lower thread section are separated to form a spiral wedge-shaped groove, the upper thread section extends to the opening end of the outer cup to the inlet and outlet, and a stopper is provided at the end of the upper thread section extending to the bottom of the outer cup, the stopper forms the locking end, and the anti-slip part is a convex ridge separating the spiral wedge-shaped groove and the inlet and outlet; the spiral wedge-shaped element enters the inlet and outlet, is introduced into the spiral wedge-shaped groove to the stopper through the convex ridge, and forms a wedge-tight fit along the axial displacement of the outer cup.

[0017] Preferably, a connecting structure and a releasing structure are provided on the rim of the locking ring, a mounting structure is provided on the cup cover, the cup cover cooperates with the opening end of the outer cup, the locking ring is located in a locking position, and a locking state is formed with the mounting structure through the connecting structure, the locking ring is located in an assembly position, and the locking state of the mounting structure is released through the releasing structure.

[0018] Preferably, the connecting structure is at least one section of pressing edge arranged on the edge of the locking ring, and the pressing edge protrudes from the inner wall of the locking ring toward the axis to form a pressing length; the releasing structure is a clearance notch on the edge of the locking ring, and the clearance notch forms a space consistent with the pressing length; the mounting structure is a protrusion arranged on the edge of the cup cover, and the protrusion extends away from the axis of the cup cover to form an assembly length; the protrusion is completely placed in the clearance notch to form an in and out fit, and at least the protrusion of the pressing edge of the pressing edge forms a locking fit.

[0019] Preferably, the bottom surface of the edge pressing is a plane, the top surface of the protruding piece is a plane, and the bottom surface of the edge pressing presses the top surface of the protruding piece to form axial compression.

[0020] Preferably, the bottom surface of the edge pressing is a wedge-shaped surface, the top surface of the protruding piece is a plane, and the bottom surface of the edge pressing presses the top surface of the protruding piece to form axial compression.

[0021] Preferably, a limiting piece is provided on the opening end of the outer cup, at least one end of the limiting piece is a limiting end, a limiting area is formed between two adjacent limiting ends, the protrusion is placed in the limiting area, and the limiting end forms a limiting stop for the protrusion; the locking ring is located in the assembly position, the clearance notch cooperates with the limiting area, the locking ring is located in the locking position, and the pressing edge cooperates with the limiting area.

[0022] Preferably, the limiting member has a yielding end, and a yielding space is formed between two adjacent yielding ends, and the yielding space coincides with the inlet and outlet.

[0023] Preferably, the limiting area coincides with the inlet and outlet.

[0024] Preferably, the locking ring is provided with a notch corresponding to the clearance gap, and the locking ring is located at the assembly position, and the notch does not extend beyond the opening end.

[0025] A method for assembling a fluid supply cup, wherein a locking ring and an outer cup are first assembled together, and when an assembly block of the locking ring reaches an assembly position, an inner liner and a cup cover are placed in an open end of the outer cup, and the locking ring rotates along an assembly direction of the outer cup, and when the assembly block reaches a locking position, the locking ring locks the outer cup, the inner liner and the cup cover; the locking ring rotates along a disassembly direction of the outer cup, and when the assembly block reaches the assembly position, the cup cover or the cup cover and the inner liner are taken out from the open end of the outer cup.

[0026] Preferably, the assembly block of the locking ring is introduced into the travel assembly groove of the outer cup, the assembly block is matched at the assembly position through the anti-slip component, and the assembly block reaches the locking end and is matched at the locking position.

[0027] Compared with the prior art, the fluid supply cup and the assembly method of the fluid supply cup have the following beneficial effects:

[0028] 1. Optimize the assembly mode: On the one hand, the outer cup and the locking ring are wedged together, and the anti-slip function is used to achieve integrated assembly of the two. On the other hand, the locking ring is used to match the cup cover with a locking structure and a release structure to achieve assembly and separation of the cup cover and the locking ring. During the disassembly operation, the cup cover and the liner can be one group, and the outer cup and the locking ring can be one group. The separation of the two groups allows the cup cover to be detached from the outer cup while ensuring that the locking ring remains on the outer cup. The cup cover and the liner can be directly discarded, and the clean cup cover and liner can be replaced and used again with the outer cup. This saves the operation of disassembling the locking ring and improves the replacement efficiency. At the same time, it avoids the waste caused by discarding the locking ring and saves production costs. This grouped integrated design makes the disassembly process more efficient and reduces waste.

[0029] 2. Enhanced sealing and stability: The outer cup uses a spiral wedge element to cooperate with the spiral wedge groove (or spiral wedge slot) of the locking ring to ensure a stable connection between the locking ring and the outer cup. This spiral wedge fit can be gradually wedged along the axial direction, thereby generating a uniform locking force, enhancing the sealing and stability of the cup cover, and preventing possible leakage during use. Further, by providing multiple symmetrically distributed spiral wedge elements and grooves (or slots), it is ensured that the locking force is evenly distributed in the circumferential direction, avoiding problems such as cup cover deflection and poor sealing due to local excessive pressure.

[0030] 3. Simplify the disassembly and assembly process: By rotating the locking ring, the spiral wedge structure and the travel assembly groove can be quickly and conveniently assembled and disassembled. Specifically, by rotating the locking ring, the assembly process from the assembly position to the locking position can be easily realized, and vice versa, the disassembly process from the locking position to the assembly position can also be realized. The operation is simple and intuitive.

[0031] In particular, by providing a release structure (such as a clearance notch and recess) and a connection structure (such as the cooperation of a pressed edge and a protrusion), after the locking ring is wedged and rotated, the cup cover can be firmly connected to the outer cup and the inner liner, and after the locking ring is loosened and rotated, the cup cover can be easily and quickly detached from the outer cup and the locking ring, thereby facilitating disassembly and replacement.

[0032] 4. Prevent accidental separation: The anti-dropping piece in this design is used to prevent the locking ring from detaching from the outer cup under improper operation, ensuring the safety of the fluid supply cup. During the disassembly process, the damping and stopping effect between the spiral wedge-shaped element and the anti-dropping piece effectively prevents the locking ring from falling off under incorrect disassembly operations. This design is particularly suitable for environments that require high stability and safety, avoiding loosening or falling off of components caused by improper operation, thereby improving safety in use.

[0033] 5. Anti-pollution function: A notch is designed on the locking ring to cooperate with the limit area to form a paint scraping area when the cup lid is open. After using the paint mixing stick to stir the paint, the paint mixing stick is tilted in the paint scraping area to scrape the paint. The reasonable tilt angle facilitates the paint scraping operation and effectively recovers the paint carried on the paint mixing stick to prevent the paint from spilling onto the outer cup or other surfaces. This design effectively reduces paint waste and external pollution.

[0034] 6. Simplified production and assembly process: The design of the fluid supply cup takes into account the assembly and disassembly operations of the components during the production process. By designing a structure that is easy to assemble and disassemble, the complexity of the production process is reduced and the production efficiency is improved. In particular, in the design of the spiral wedge element and the locking structure, the injection molding method is used to reduce the manufacturing cost and process difficulty, while also improving the close fit between the components and reducing the error during assembly.

[0035] 7. Multiple structural optimizations provide flexible applications: According to needs, the design provides multiple optimization options (such as the matching mode of the edge pressing and the convex piece, the layout of the spiral wedge-shaped element, the setting of the limiter, etc.), which can be flexibly adjusted according to actual needs to adapt to different usage scenarios and requirements. This flexibility allows the fluid supply cup to be widely used in different types of spraying equipment and liquid containers to meet diverse market needs.

[0036] 8. Weight reduction and enhanced grip: The design of evenly distributed weight reduction notches on the locking ring effectively reduces the overall weight without affecting the strength of the locking ring, thus optimizing the portability of the product. The rough features of the outer wall of the locking ring (such as wave structure or rough texture) increase friction, improve the user's grip when rotating the locking ring, and ensure the stability and comfort of the operation.

[0037] 9. Enhanced aesthetics: In addition to functionality, the design also takes into account the optimization of appearance. The arrangement of the limiters, the weight-reducing notches and the layout of the spiral wedge-shaped elements improve the aesthetics of the fluid supply cup, reduce external interference, and enhance the elegance of the overall design.

[0038] In summary, this fluid supply cup adopts an advanced spiral wedge-shaped matching structure, an innovative locking and anti-dropping design, an optimized sealing method, and a convenient disassembly mechanism, which not only ensures the fluid supply function, but also greatly improves the safety of use, the convenience of operation, the environmental protection, and the efficiency of disassembly and assembly. Its structural design takes into account a variety of needs, giving it a wide range of application potentials. It is an efficient, reliable, environmentally friendly and convenient fluid supply system. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is an exploded three-dimensional structural diagram of the fluid supply cup.

[0040] Figure 2 This is a three-dimensional structural diagram of the locking assembly of the fluid supply cup.

[0041] Figure 3 This is a three-dimensional structural diagram of the first solution of the locking ring in the fluid supply cup.

[0042] Figure 4 This is a three-dimensional structural diagram of the second solution of the locking ring in the fluid supply cup.

[0043] Figure 5 This is a main structural diagram of the internal coordination of the fluid supply cup when the locking ring is in the inlet and outlet positions.

[0044] Figure 6 This is a three-dimensional structural diagram of the internal coordination of the fluid supply cup when the locking ring is in the in and out position.

[0045] Figure 7 This is a front view of the internal matching structure of the fluid supply cup in the assembled position.

[0046] Figure 8 This is a three-dimensional structural diagram of the internal matching of the fluid supply cup in the assembly position.

[0047] Fig. 9 This is a front view of the internal matching structure of the fluid supply cup in the locked position.

[0048] Fig.10 This is a three-dimensional structural diagram of the internal matching of the fluid supply cup in the locked position.

[0049] Fig.11 This is a three-dimensional structural diagram of the fluid supply cup in the assembly position.

[0050] Fig.12 This is an exploded three-dimensional structural diagram of the double limiter solution for the fluid supply cup.

[0051] Fig.13 This is an exploded three-dimensional structural diagram of the infinite position parts solution of the fluid supply cup.

[0052] Fig.14 This is a three-dimensional structural diagram of the paint scraping feature of the fluid supply cup.

[0053] In the figure, 1, cup cover; 11, fluid outlet; 12, protrusion; 2, lining; 21, flange; 3, outer cup; 31, inlet and outlet; 32, spiral wedge-shaped groove; 33, end groove wall; 34, convex ridge; 35, limit piece; 36, limit area; 37, clearance space; 4, locking ring; 41, spiral wedge-shaped element; 42, pressing edge; 43, clearance notch; 44, recess; 45, weight-reducing notch. DETAILED DESCRIPTION

[0054] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0055] like Figure 1 and 2 As shown, the fluid supply cup comprises a cup cover 1 having a fluid outlet 11, and the fluid outlet 11 is suitable for connecting the cup cover 1 to a spraying device;

[0056] a liner 2 having a flange 21 that collapses when fluid contained within the liner 2 is drawn from the fluid supply cup;

[0057] An outer cup 3 having an open end, wherein a cup cover 1 extends over the open end and an inner liner 2 is received in the outer cup 3, and the cup cover 1 is adapted to the outer cup 3 and the inner liner 2;

[0058] The outer cup 3 can be connected to the locking ring 4, and the locking ring 4 can rotate around the axial direction of the outer cup 3, and the outer cup 3 and the locking ring 4 are assembled together; the locking ring 4 is located in the locking position, and the locking ring 4, the cup cover 1, the liner 2 and the outer cup 3 are connected to form an integrated type; the locking ring 4 is located in the assembly position, and the cup cover 1 can be detached from the open end of the outer cup 3.

[0059] Preferably, an assembly block is provided on the locking ring 4, and a stroke assembly groove is provided at a corresponding position of the outer cup 3, the assembly block is adapted to the stroke assembly groove, the above-mentioned locking position is arranged in the stroke assembly groove, the above-mentioned assembly position is arranged in the stroke assembly groove or outside the stroke assembly groove, and the locking ring 4 can move between the locking position and the assembly position of the stroke assembly groove.

[0060] The arrangement positions of the assembly block and the travel assembly groove can be interchanged, that is, the assembly block is arranged on the outer cup, and the travel assembly groove is arranged on the locking ring, which can also realize the matching connection between the assembly block and the travel assembly groove.

[0061] Preferably, the travel assembly groove is located between the inlet and outlet 31 and the locking end, and an anti-slip component is arranged between the travel assembly groove and the inlet and outlet 31. The anti-slip component forms an anti-slip stop for the assembly block located in the travel assembly groove, the assembly block cooperates with the locking end to form a locking position, and the assembly block cooperates with the anti-slip component to form an assembly position.

[0062] The assembly block of the locking ring 4 is inserted into the inlet and outlet 31, and enters the travel assembly groove through the damping force of the anti-slipping member, and moves to the locking end along the travel of the travel assembly groove. At this time, the locking ring 4 is in the locking position. The assembly block of the locking ring 4 is moved toward the inlet and outlet 31 along the travel of the travel assembly groove until the assembly block abuts against the anti-slipping member, and is restricted by the stopper of the anti-slipping member so that the assembly block is not easy to fall out of the travel assembly groove. At this time, the locking ring 4 is in the assembly position. Apply a moderate external force to make the assembly block overcome the damping force of the anti-slipping member and move to the inlet and outlet 31, so as to achieve the separation of the locking ring 4 and the outer cup 3.

[0063] The matching of the assembly block and the travel assembly groove can be specifically carried out in the following two ways:

[0064] like Figures 1 to 11 As shown, in the first type, the assembly block is a spiral wedge-shaped element 41 arranged on the inner wall of the locking ring 4, the travel assembly groove is a spiral wedge-shaped groove 32 arranged on the outer wall of the outer cup 3, the spiral wedge-shaped groove 32 extends to the open end of the outer cup 3 to form an inlet and outlet 31, the spiral wedge-shaped groove 32 extends toward the bottom of the outer cup 3 to the end groove wall 33 to form a locking end, and the anti-slip part is a convex ridge 34 separating the spiral wedge-shaped groove 32 and the inlet and outlet 31; the spiral wedge-shaped element 41 enters the inlet and outlet 31, and is introduced into the spiral wedge-shaped groove 32 to the end groove wall 33 through the convex ridge 34, forming a wedge-tight fit along the axial displacement of the outer cup 3.

[0065] The number of spiral wedge-shaped elements 41 is at least one, and the number of corresponding spiral wedge-shaped grooves 32 is at least one, that is, the two form a one-to-one correspondence. When the number of spiral wedge-shaped elements 41 / spiral wedge-shaped grooves 32 is designed to be only one, the circumferential locking points of the locking ring 4 and the outer cup 3 are arranged asymmetrically, resulting in uneven locking force, which can easily cause problems such as deflection of the cup cover 1 and poor sealing. Therefore, at least two groups of spiral wedge-shaped elements 41 and spiral wedge-shaped grooves 32 are arranged in a centrally symmetrical manner to cooperate with each other, provide circumferentially uniform locking points, and form a balanced locking force, which is the best solution.

[0066] When the spiral wedge-shaped element 41 is placed in the area of ​​the spiral wedge-shaped groove 32, the spiral wedge-shaped element 41 is blocked from entering the inlet and outlet 31 by the convex ridge 34, so that the locking ring 4 is set on the outer cup 3 to form an integrated assembly. When the spiral wedge-shaped element 41 moves to the end groove wall 33, it is in the locking position. When the spiral wedge-shaped element 41 moves to the convex ridge 34, it is in the assembly position. In the assembly position, the outer cup 3 is separated from the cup cover 1 and the liner 2, so that the outer cup 3 and the locking ring 4 are formed as a whole, and the cup cover 1 and the liner 2 are formed as a whole, thereby avoiding the locking ring 4 from being retained on the cup cover 1, and still needing to remove the locking ring 4 separately, or discarding the locking ring 4, the cup cover 1 and the liner 2 together to cause waste.

[0067] The assembly block can also use other features such as threaded segments, flat strips, convex strips, etc. to replace the spiral wedge-shaped element 41, wherein the spiral wedge-shaped element 41 and the threaded segment have an inclination angle relative to the plane of the cup cover 1, and the flat strips and convex strips are parallel to the plane of the cup cover 1. The spiral wedge-shaped groove 32 has an inclination angle, and a height difference is formed along the axis of the outer cup 3 through the inclination angle, thereby providing a locking ring 4 to move along the axis to perform a pressing operation.

[0068] The second type, the assembly block is a spiral wedge-shaped element 41 arranged on the inner wall of the locking ring 4, and the travel assembly groove is a locking component arranged on the outer wall of the outer cup 3, the locking component includes a corresponding upper thread section and a lower thread section, the upper thread section and the lower thread section are separated to form a spiral wedge-shaped groove, the upper thread section extends to the opening end of the outer cup 3 to the inlet and outlet 31, and a stopper is provided at the end of the upper thread section extending to the bottom of the outer cup 3, the stopper forms a locking end, and the anti-slip part is a convex rib 34 separating the spiral wedge-shaped groove and the inlet and outlet 31; the spiral wedge-shaped element 41 enters the inlet and outlet 31, and is introduced into the spiral wedge-shaped groove to the stopper through the convex rib 34, forming a wedge-tight fit along the axial displacement of the outer cup 3.

[0069] In order to ensure that the locking ring 4 evenly presses the cup cover 1 to fit the outer cup 3, at least two groups of spiral wedge elements 41 are provided to cooperate with the locking assembly, and the two groups of spiral wedge elements 41 and the locking assembly are arranged symmetrically around the axis.

[0070] The upper thread segment is a continuous complete thread segment, so that the upper thread segment cooperates with the spiral wedge-shaped element 41 to provide continuous locking force. The lower thread segment can be a continuous complete thread segment, or it can be multiple thread segments arranged along the same thread line, with gaps between the multiple thread segments, and the gaps do not affect the guiding and restraining effect of the lower thread segment on the bottom surface of the spiral wedge-shaped element 41, that is, the position of the gaps still belongs to a part of the travel assembly groove. The lower thread segment can also be shorter than the upper thread segment, and gaps are formed at both ends of the lower thread segment corresponding to the upper thread segment, but the gaps do not affect the guiding and restraining effect of the lower thread segment on the bottom surface of the spiral wedge-shaped element 41, and the position of the gaps still belongs to a part of the travel assembly groove.

[0071] When the spiral wedge element 41 is introduced into the spiral wedge slot, the upper thread section guides and constrains the top surface of the spiral wedge element 41, and the lower thread section guides and constrains the bottom surface of the spiral wedge element 41, thereby guiding the spiral wedge element 41 to rotate only along the spiral wedge slot, forming an axial displacement relative to the outer cup 3. The stopper is a protrusion bent from the end of the upper thread section to the bottom of the outer cup 3, and the end of the spiral wedge element 41 stops rotating after it abuts against the protrusion. When the spiral wedge element 41 is placed in the area of ​​the spiral wedge slot, the convex rib 34 blocks the spiral wedge element 41 from entering the inlet and outlet 31. When the spiral wedge element 41 moves to the stopper, it is in the locking position. When the spiral wedge element 41 moves to the convex rib 34, it is in the assembly position. In the assembly position, the locking ring 4 is arranged on the outer cup 3 to form an integrated assembly.

[0072] The spiral wedge-shaped element 41 is a threaded line protruding from the inner wall of the locking ring 4. The end of the threaded line entering the stroke assembly groove is the starting end, and the end of the threaded line moving out of the stroke assembly groove is the ending end. The threaded line gradually thickens from the starting end to the ending end, and both the starting end and the ending end are arc chamfered. The interference fit between the starting end and the ridge 34 is smaller, and the interference fit between the ending end and the ridge 34 is larger, thereby making it easy for the starting end to pass through the ridge 34, while the ending end is relatively difficult to pass through the ridge 34, further improving the anti-slip effect.

[0073] like Figure 3 and 4 As shown, preferably, a connection structure and a release structure are provided on the edge of the locking ring 4, and a mounting structure is provided on the cup cover 1, and the cup cover 1 is matched with the opening end of the outer cup 3, as shown in FIG. Fig. 9 , 10 As shown in FIG. 2 , the locking ring 4 is located in the locking position, and a locking state is formed through the connecting structure and the mounting structure, such as Figure 7 , 8, and 11, the locking ring 4 is located at the assembly position, and the locking state of the mounting structure is released by the release structure. The connection structure and the release structure are arranged around the axial direction of the locking ring 4. When the locking ring 4 rotates an angle, the connection structure is combined with the mounting structure to realize the locking assembly of the cup cover 1; when the locking ring 4 continues to rotate an angle, the release structure corresponds to the mounting structure, so that the cup cover 1 and the liner 2 can be separated from the locking ring 4 and the outer cup 3.

[0074] like Figure 3 and 4 As shown, preferably, the connection structure is at least one section of pressing edge 42 arranged on the edge of the locking ring 4, and the pressing edge 42 protrudes from the inner wall of the locking ring 4 toward the axis to form a pressing length; the release structure is a clearance notch 43 on the edge of the locking ring 4, and the clearance notch 43 forms a space consistent with the pressing length; as shown in FIG. Figure 1 , 11 As shown in FIG. 2 , the mounting structure is a protrusion 12 arranged on the edge of the cup cover 1, and the protrusion 12 extends away from the axis of the cup cover 1 to form an assembly length; the protrusion 12 is completely placed in the clearance notch 43 to form an in-and-out fit, and the pressing edge 42 at least presses part of the protrusion 12 to form a locking fit.

[0075] The edge pressing 42 and the locking ring 4 are integrally formed by injection molding, and specifically, the edge pressing 42 is formed by bending the edge of the locking ring 4 toward the inner circumference to form an arc strip. The clearance gap 43 is the vacant position of the edge pressing 42. When the number of the edge pressing 42 is one section, the clearance gap 43 is the remaining edge portion of the locking ring 4; when the number of the edge pressing 42 is at least two sections, the clearance gap 43 is the edge portion between two adjacent edge pressings 42.

[0076] When the number of the pressing edge 42 is only one section, it can only press and hold the protruding piece 12 on one side of the cup cover 1, resulting in an asymmetric layout of the circumferential locking points of the locking ring 4 and the cup cover 1, resulting in uneven locking force, which can easily cause problems such as deflection of the cup cover 1 and poor sealing. Therefore, it is the best solution to arrange at least two sections of the pressing edge 42 in a centrally symmetrical manner to cooperate with the protruding piece 12 to provide circumferentially evenly distributed locking points to form a balanced locking force.

[0077] The main body diameter of the cup cover 1 is smaller than the inner diameter of the circumference surrounded by the edge 42, and the main body diameter of the cup cover 1 is larger than the inner diameter of the open end of the outer cup 3, so that the cup cover 1 can overlap the open end of the outer cup 3 and be located in the space surrounded by the edge 42. The outer diameter of the lug 12 is smaller than the inner wall diameter of the locking ring 4, and the outer diameter of the lug 12 is larger than the inner diameter of the circumference surrounded by the edge 42, so that the lug 12 is located in the locking ring 4, and the pressure ring forms a pressing and holding effect on the lug 12 along the axial direction.

[0078] like Fig.13As shown, in this design, the open end of the outer cup 3 can adopt a circumferential plane design, that is, there is no structure on the open end to limit the protruding piece 12 of the cup cover 1, so that the cup cover 1 can cover the open end at any angle, and the screw-in fitting angle constraint of the assembly block of the locking ring 4 and the stroke assembly groove of the outer cup 3 is relatively small. Even if the locking ring 4 slightly exceeds the assembly position, the protruding piece 12 of the cup cover 1 can be fitted on the open end of the outer cup 3; but when the locking ring 4 is too close to the locking position, the locking stroke of the screwing is too small and there is a lack of stop limit, which causes the protruding piece 12 to be pushed to move and cannot be pressed and locked.

[0079] The following methods can be used to cooperate between the edge pressing 42 and the protruding piece 12:

[0080] The first type is that the bottom surface of the pressing edge 42 is a plane, and the top surface of the protruding piece 12 is a plane, and the bottom surface of the pressing edge 42 presses the top surface of the protruding piece 12 to form an axial compression. The contact between the planes is used to form a pressing surface, thereby increasing the force bearing area, increasing the friction force, and improving the locking stability and sealing effect.

[0081] The second type is that the bottom surface of the edge pressing 42 is a wedge-shaped surface, and the top surface of the protruding piece 12 is a plane. The bottom surface of the edge pressing 42 presses the top surface of the protruding piece 12 to form axial compression. The contact between the wedge-shaped surface and the plane is used to form a pressing point, and the wedge-shaped surface forms a gradually increasing wedging force on the plane to achieve a locking effect. The bottom surface of the edge pressing 42 can also be designed as a plane, and the top surface of the protruding piece 12 can be designed as a wedge-shaped surface. The locking principle is the same. However, the contact between the two is point contact, and the locking stability is relatively reduced due to the reduced force area.

[0082] like Figure 1 and 12 As shown, preferably, a limit piece 35 is provided on the opening end of the outer cup 3, at least one end of the limit piece 35 is a limit end, a limit area 36 is formed between two adjacent limit ends, the protrusion 12 is placed in the limit area 36, ​​and the limit end forms a limit stop for the protrusion 12; the locking ring 4 is located in the assembly position, the displacement notch 43 cooperates with the limit area 36, ​​the locking ring 4 is located in the locking position, and the pressing edge 42 cooperates with the limit area 36.

[0083] The stopper 35 is an arc-shaped segment protruding from the open end, and the stopper region 36 is the open end region exposed by the stopper 35 intermittently. The number of the stopper regions 36 is consistent with the number of the protruding pieces 12, the clearance notches 43, and the pressure edges 42. The length of the stopper region 36 is the rotation range of the protruding piece 12. When the locking ring 4 rotates until the clearance notch 43 overlaps with the stopper region 36, after the protruding piece 12 is placed in the stopper region 36, the locking ring 4 is continuously rotated so that the pressure edge 42 gradually overlaps with the stopper region 36, and the protruding piece 12 is blocked from leaving the stopper region 36 by the stopper end, so that the pressure edge 42 enters the stopper region 36 and presses the protruding piece 12 at the same time.

[0084] The arrangement of the limiting member 35 is specifically in the following two ways:

[0085] like Fig.12 As shown, in the first type, the limit member 35 has a clearance end, and a clearance space 37 is formed between two adjacent clearance ends, and the clearance space 37 coincides with the inlet and outlet 31. The clearance space 37 is the open end area exposed by the interruption of the limit member 35, and the number of the clearance spaces 37 is consistent with the number of the inlet and outlet 31. The clearance space 37 and the limit area 36 are open end areas at different positions. Because the outer diameter of the limit member 35 exceeds the size of the inlet and outlet 31, in order to avoid the limit member 35 interfering with the spiral wedge-shaped element 41 to match the inlet and outlet 31, the length of the limit member 35 is shortened and the number is doubled, forming a plurality of interval gaps to form the clearance space 37 and the limit area 36 respectively, wherein the spiral wedge-shaped element 41 matches the inlet and outlet 31 through the clearance space 37. In this design scheme, the number of the limit members 35 is twice that of the pressure edge 42, that is, two limit members 35 correspond to one pressure edge 42 to form an assembly position.

[0086] like Figure 1 As shown, in the second case, the limiting area 36 coincides with the inlet and outlet 31. By coinciding the limiting area 36 with the inlet and outlet 31, the limiting area 36 can not only determine the rotation range of the protruding piece 12, but also realize the cooperation between the spiral wedge-shaped element 41 and the inlet and outlet 31. The length of the limiting member 35 is appropriately increased, and the interval between adjacent limiting members 35 is the limiting interval. In this design, the number of limiting members 35 and the edge pressing 42 is equal, that is, one limiting member 35 corresponds to one edge pressing 42 to form an assembly position, and the relatively reduced number of limiting members 35 also improves the aesthetics of the outer cup 3.

[0087] like Figure 3 , 4 As shown in 14, preferably, the locking ring 4 is provided with a notch 44 corresponding to the clearance notch 43, and the locking ring 4 is located at the assembly position, and the notch 44 does not exceed the opening end. The locking ring 4 has a ring wall, and the two sides of the ring wall have edges, wherein a pressure edge 42 is provided on one side of the edge, and the edge area corresponding to the clearance notch 43 is recessed toward the ring wall to form a notch 44, and the height of the ring wall at this position is reduced by the notch 44. When the locking ring 4 is located at the assembly position, the protruding piece 12 is released through the clearance notch 43, the cup cover 1 is removed, the liner 2 is accommodated in the outer cup 3, and a paint mixing rod is used to extend into the liner 2 to stir the paint. Since the position of the notch 44 is lower than the position of the pressure edge 42 and is flush with the opening end, after the stirring is completed, the outer end of the paint mixing rod can extend from the notch 44 area to form a larger inclination angle, so that it is convenient for the paint mixing rod to scrape the paint from the edge of the liner 2, realize the paint recovery function, and avoid the paint spilling to the outside to cause pollution to the outer cup 3.

[0088] like Figure 3 and 4As shown, preferably, a plurality of weight-reducing notches 45 are evenly distributed on the locking ring 4; and a rough feature is arranged on the outer wall of the locking ring 4. The weight-reducing notches 45 are arranged on the edge of the other side of the ring wall. The weight-reducing notches 45 do not affect the overall strength of the locking ring 4, but can save materials and reduce weight. The rough feature can adopt a wave structure, a rough texture or other similar concave-convex structure, so as to achieve the effect of increasing friction, so as to facilitate the hand-held rotation of the locking ring 4 to achieve easy locking or disassembly.

[0089] A method for assembling a fluid supply cup, wherein a locking ring 4 and an outer cup 3 are first assembled together, and when the assembly block of the locking ring 4 reaches the assembly position, the liner 2 and the cup cover 1 are placed in the open end of the outer cup 3, and the locking ring 4 rotates along the assembly direction of the outer cup 3. When the assembly block reaches the locking position, the locking ring 4 locks the outer cup 3, the liner 2 and the cup cover 1; the locking ring 4 rotates along the disassembly direction of the outer cup 3, and when the assembly block reaches the assembly position, the cup cover 1 or the cup cover 1 and the liner 2 are taken out from the open end of the outer cup 3.

[0090] Preferably, the assembly block of the locking ring 4 is introduced into the travel assembly groove of the outer cup 3, the assembly block is matched in the assembly position through the anti-slip piece, and the assembly block reaches the locking end and is matched in the locking position.

[0091] The assembly method of the fluid supply cup specifically includes the following steps:

[0092] 1. If Figure 5 and 6 As shown, the liner 2 is placed in the outer cup 3 , and the edge of the locking ring 4 with the weight-reducing notch 45 is directed toward the outer cup 3 , and the spiral wedge-shaped element 41 is buckled into the inlet and outlet 31 of the outer wall of the outer cup 3 .

[0093] 2. If Figure 7 , 8 As shown in 11, the locking ring 4 is rotated clockwise to apply a screwing force to overcome the interference between the spiral wedge-shaped element 41 and the ridge 34, so that the spiral wedge-shaped element 41 enters the travel assembly groove. When the rear end of the spiral wedge-shaped element 41 contacts the ridge 34, the locking ring 4 is in the assembly position, that is, the clearance notch 43 and the recess 44 of the locking ring 4 coincide with the limiting area 36 of the outer cup 3. The cup cover 1 covers the open end and the protrusion 12 is placed in the limiting area 36. At the same time, the connecting port of the cup cover 1 extends into the liner 2 to form a seal.

[0094] 3. If Fig. 9 , 10As shown in and 2, continue to rotate the locking ring 4 in the clockwise direction, and the spiral wedge-shaped element 41 is screwed in along the spiral trajectory of the travel assembly groove, so that the pressure edge 42 gradually turns into the limiting area 36 and overlaps with the protrusion 12. At the same time, the locking ring 4 is driven to descend axially due to the spiral trajectory. When the spiral wedge-shaped element 41 reaches the locking end, the pressure edge 42 synchronously descends to the position of pressing the protrusion 12, thereby realizing the integral connection of the outer cup 3, the liner 2 and the cup cover 1.

[0095] 4. If Figure 7 , 8 As shown in Figure 11, the locking ring 4 is rotated counterclockwise to rotate the spiral wedge-shaped element 41 out along the spiral trajectory of the travel assembly groove, and the pressing edge 42 gradually rises and synchronously rotates out of the limiting area 36. The gap formed by the rising pressing edge 42 releases the protrusion 12 until the spiral wedge-shaped element 41 reaches the convex ridge 34, and the pressing edge 42 completely withdraws from the limiting area 36, ​​allowing the notch 43 and the recess 44 to overlap with the limiting area 36 again, completely exposing the protrusion 12 of the cup cover 1, and the cup cover 1 can be removed from the open end of the outer cup 3.

[0096] 5. If Fig.14 As shown, after the cup cover 1 is taken out, the locking ring 4 is still assembled on the outer cup 3 because the convex ridge 34 forms an anti-dropping effect on the spiral wedge-shaped element 41. Figure 1 As shown, further counterclockwise twisting force is applied to allow the spiral wedge-shaped element 41 to overcome the interference with the ridge 34 and enter the inlet 31 , and the locking ring 4 can be pulled out axially to separate from the outer cup 3 .

[0097] The specific embodiments described herein are merely examples of the spirit of the present invention. A person skilled in the art of the present invention may make various modifications or supplements to the specific embodiments described or replace them in a similar manner, but will not deviate from the spirit of the present invention or exceed the defined scope. Although the present invention is described and described in detail in the drawings and the foregoing description, such descriptions and descriptions are considered to be illustrative or exemplary rather than restrictive. It should be understood that within the scope of the following claims, changes and modifications may be made by a person of ordinary skill. Specifically, the present invention encompasses additional embodiments having any combination of features from the above-mentioned different embodiments. With respect to the use of the expression "generally" or "substantially", this patent application should be understood to disclose that these features and values ​​are also fully satisfied, i.e., there is no aforementioned characterization as "generally" or "substantially".

[0098] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A fluid supply cup, comprising a cup cover having a fluid outlet, wherein the fluid outlet is suitable for coupling the cup cover to a spraying device; a liner having a flange that collapses when fluid contained within the liner is drawn from a fluid supply cup; An outer cup having an open end, wherein the cup cover extends over the open end and the liner is received in the outer cup, the cup cover being adapted to fit the outer cup and the liner; Features: The outer cup can be connected to the locking ring, and the locking ring can rotate around the axial direction of the outer cup, and the outer cup and the locking ring are assembled together; the locking ring is in the locking position, and the locking ring, the cup cover, the liner and the outer cup are connected to form an integral body; the locking ring is in the assembly position, and the cup cover can be detached from the open end of the outer cup.

2. The fluid supply cup of claim 1, wherein: An assembly block is arranged on the locking ring, and a stroke assembly groove is arranged at a corresponding position of the outer cup. The assembly block is adapted to the stroke assembly groove. The above-mentioned locking position is arranged in the stroke assembly groove. The above-mentioned assembly position is arranged in the stroke assembly groove or outside the stroke assembly groove. The locking ring can move between the locking position and the assembly position of the stroke assembly groove.

3. The fluid supply cup of claim 2, wherein: The travel assembly groove is located between the inlet and outlet and the locking end, and an anti-slip component is arranged between the travel assembly groove and the inlet and outlet. The anti-slip component forms an anti-slip stop for the assembly block located in the travel assembly groove, and the assembly block cooperates with the locking end to form a locking position, and the assembly block cooperates with the anti-slip component to form an assembly position.

4. The fluid supply cup of claim 3, wherein: The assembly block is a spiral wedge-shaped element arranged on the inner wall of the locking ring, the travel assembly groove is a spiral wedge-shaped groove arranged on the outer wall of the outer cup, the spiral wedge-shaped groove extends to the open end of the outer cup to form the inlet and outlet, the spiral wedge-shaped groove extends toward the bottom of the outer cup to the end groove wall to form the locking end, and the anti-slip part is a convex ridge separating the spiral wedge-shaped groove and the inlet and outlet; the spiral wedge-shaped element enters the inlet and outlet, is introduced into the spiral wedge groove through the convex ridge to the end groove wall, and forms a wedge-tight fit along the axial displacement of the outer cup.

5. The fluid supply cup of claim 3, wherein: The assembly block is a spiral wedge-shaped element arranged on the inner wall of the locking ring, and the travel assembly groove is a locking component arranged on the outer wall of the outer cup. The locking component includes a corresponding upper thread section and a lower thread section, and the upper thread section and the lower thread section are separated to form a spiral wedge-shaped groove. The upper thread section extends to the opening end of the outer cup to the inlet and outlet, and a stopper is provided at the end of the upper thread section extending to the bottom of the outer cup. The stopper forms the locking end, and the anti-slip component is a convex ridge separating the spiral wedge-shaped groove and the inlet and outlet; the spiral wedge-shaped element enters the inlet and outlet, and is introduced into the spiral wedge groove to the stopper through the convex ridge, forming a wedge-tight fit along the axial displacement of the outer cup.

6. The fluid supply cup of claim 2, wherein: A connecting structure and a releasing structure are arranged on the rim of the locking ring, a mounting structure is arranged on the cup cover, the cup cover is matched with the opening end of the outer cup, the locking ring is located in the locking position, and a locking state is formed with the mounting structure through the connecting structure, the locking ring is located in the assembly position, and the locking state of the mounting structure is released through the releasing structure.

7. The fluid supply cup of claim 6, wherein: The connecting structure is at least one section of pressing edge arranged on the edge of the locking ring, and the pressing edge protrudes from the inner wall of the locking ring toward the axis to form a pressing length; the releasing structure is a clearance notch on the edge of the locking ring, and the clearance notch forms a space consistent with the pressing length; the mounting structure is a protrusion arranged on the edge of the cup cover, and the protrusion extends away from the axis of the cup cover to form an assembly length; the protrusion is completely placed in the clearance notch to form an in-and-out fit, and at least the protrusion of the pressing edge of the pressing edge forms a locking fit.

8. The fluid supply cup of claim 7, wherein: The bottom surface of the edge pressing is a plane, the top surface of the protruding piece is a plane, and the bottom surface of the edge pressing presses the top surface of the protruding piece to form axial compression.

9. The fluid supply cup of claim 7, wherein: The bottom surface of the edge pressing is a wedge-shaped surface, the top surface of the protruding piece is a plane, and the bottom surface of the edge pressing presses the top surface of the protruding piece to form axial compression.

10. The fluid supply cup of claim 7, wherein: A limiting piece is arranged on the opening end of the outer cup, at least one end of the limiting piece is a limiting end, a limiting area is formed between two adjacent limiting ends, the protrusion is placed in the limiting area, and the limiting end forms a limiting stop for the protrusion; the locking ring is located in the assembly position, the clearance notch cooperates with the limiting area, the locking ring is located in the locking position, and the pressing edge cooperates with the limiting area.

11. The fluid supply cup of claim 10, wherein: The limiting member has a yielding end, and a yielding space is formed between two adjacent yielding ends, and the yielding space coincides with the inlet and outlet.

12. The fluid supply cup of claim 10, wherein: The limiting area coincides with the inlet and outlet.

13. The fluid supply cup of claim 10, wherein: The locking ring is provided with a notch corresponding to the clearance gap, the locking ring is located at the assembly position, and the notch does not exceed the opening end.

14. A method for assembling a fluid supply cup, characterized in that: The locking ring and the outer cup are first assembled together. When the assembly block of the locking ring reaches the assembly position, the liner and the cup cover are put in to match the open end of the outer cup. The locking ring rotates along the assembly direction of the outer cup. When the assembly block reaches the locking position, the locking ring locks the outer cup, the liner and the cup cover; the locking ring rotates along the disassembly direction of the outer cup. When the assembly block reaches the assembly position, the cup cover or the cup cover and the liner are taken out from the open end of the outer cup.

15. The method for assembling a fluid supply cup according to claim 14, wherein: The assembly block of the locking ring is introduced into the travel assembly groove of the outer cup, the assembly block is matched at the assembly position through the anti-slip piece, and the assembly block reaches the locking end and is matched at the locking position.

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