A fluid supply cup and method of using a fluid supply cup

Abstract

The application provides a fluid supply cup and a method for using the same, which comprises a matched rigid outer cup and a cup cover. A plurality of locking grooves are arranged on the inner periphery of the cup mouth of the rigid outer cup. A plurality of clamping elements are correspondingly arranged on the outer edge of the cup cover. The clamping elements can be introduced into the corresponding locking grooves to connect the rigid outer cup and the cup cover. An anti-falling structure is arranged between the clamping elements and the corresponding locking grooves. The clamping elements are screwed into the locking grooves. The clamping elements gradually transition from the clearance fit area to the locking fit area. The damping force of the anti-falling structure is matched in the clearance fit area. The limiting fit and the locking fit of the clamping elements and the locking grooves are arranged separately to realize an orderly fit mode. When the clamping elements are unscrewed from the locking grooves, the screwing force first overcomes the wedge locking force of the threaded structure and then overcomes the stopping force of the anti-falling structure. The method can avoid the disassembly difficulty caused by simultaneously facing two kinds of composite resistance and can avoid the problem that the outer cup and the cup cover are easily separated.

Description

Technical Field

[0001] This invention belongs to the field of container technology and relates to a fluid storage device for a spray gun, particularly a fluid supply cup and a method of using the fluid supply cup. Background Technology

[0002] Current spray guns mainly use pneumatic methods to atomize the paint before spraying. Therefore, it is necessary to supply paint to the spray gun. The most 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 simultaneously, 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 consists of three parts: a rigid outer cup, an inner liner, and a lid. The lid and inner liner are fitted together, the inner liner is placed inside the rigid outer cup, and finally the lid seals the rigid outer cup, assembling it into a single unit using a threaded locking mechanism. The lid has a liquid supply port connecting to the paint storage chamber of the inner liner, and this port has a threaded structure that allows for a detachable connection with the spray gun's inlet. Because paint needs frequent replacement or replenishment, the supply cup needs to be replaced periodically. This means the liquid supply port on the lid and the spray gun's inlet need to be frequently separated. Since the lid and rigid outer cup also use a threaded connection with the same thread direction, when the rigid outer cup is unscrewed to remove the entire supply cup, the lid and rigid outer cup are also subjected to the same twisting and separating force. Therefore, during the removal of the entire supply cup, there is a risk that the lid and rigid outer cup may separate from the spray gun before the lid, or that the lid and rigid outer cup may loosen, affecting the stability of the supply cup assembly.

[0004] If the cup lid easily separates from the rigid outer cup, it will affect the replacement of the supply cup and may also cause the remaining paint in the liner to leak, reducing the user's operating experience and seriously reducing work efficiency. The leaked paint may contaminate the spray gun or even the painted product, causing the product to be scrapped and resulting in a processing accident. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by providing a fluid supply cup and a method for using the fluid supply cup.

[0006] The objective of this invention can be achieved through the following technical solution: A fluid supply cup includes a fitted rigid outer cup and a cup lid. The mouth of the rigid outer cup is provided with a plurality of locking slots, and the outer edge of the cup lid is provided with a plurality of snap-fit ​​elements. The snap-fit ​​elements can be inserted into the corresponding locking slots to connect the rigid outer cup and the cup lid. An anti-detachment structure is provided between the snap-fit ​​elements and the corresponding locking slots. The snap-fit ​​elements are screwed into the locking slots, and the snap-fit ​​elements gradually transition from the clearance fit area to the locking fit area. The damping force of the anti-detachment structure is engaged within the clearance fit area.

[0007] In the fluid supply cup described above, the snap-fit ​​element is provided with a first mechanical feature, and the cup opening or the locking groove is provided with a second mechanical feature adapted to the first mechanical feature; the first mechanical feature and the second mechanical feature form the above-mentioned anti-detachment structure.

[0008] The snap-fit ​​element is screwed into the locking groove, and the snap-fit ​​element gradually transitions from the clearance fit area to the locking fit area. The damping forces of the first mechanical feature and the second mechanical feature are engaged in the clearance fit area.

[0009] In the fluid supply cup described above, the anti-detachment structure includes a protruding ridge on the inner wall of the rigid outer cup. The ridge is located on the inner wall of the rigid outer cup in the clearance fit area. The ridge protrudes towards the center of the cup opening of the rigid outer cup. The outer edge of the locking element is provided with a first-level step and a second-level step sequentially from the screw-in end. The step difference between the first-level step and the second-level step forms a stepped portion. The locking element is screwed into the locking groove. The first-level step and the ridge form a damping force.

[0010] In the fluid supply cup described above, the anti-detachment structure includes at least one protrusion protruding from the inner wall of the rigid outer cup. The protrusion is located on the inner wall of the rigid outer cup along the extension line of the locking groove. The protrusion protrudes toward the center of the cup opening of the rigid outer cup. At least one groove is provided on the outer edge of the snap-fit ​​element. The protrusion can be embedded in the groove. The snap-fit ​​element is screwed into the locking groove. The protrusion and the tail end of the snap-fit ​​element form a stop and limit.

[0011] In the fluid supply cup described above, the anti-detachment structure includes at least one protruding rib on the lower spiral surface of the snap-fit ​​element, and at least one corresponding slot is provided on the arc-shaped protrusion of the locking groove. The snap-fit ​​element is screwed into the locking groove, and the protruding rib is correspondingly embedded in the slot.

[0012] In the aforementioned fluid supply cup, the anti-detachment structure includes an elastic sheet protruding from the outer edge of the cup lid. The elastic sheet is arranged on the extension line of the tail end of the locking element. The circumferential surface of the rigid outer cup is provided with a through groove corresponding to the arc-shaped protrusion of the locking slot. The elastic sheet is provided with a protrusion facing the lower surface of the through groove. The locking element is screwed into the locking slot. The circumferential surface presses the protrusion, causing the elastic sheet to undergo elastic deformation. The protrusion moves into the through groove, causing the elastic sheet to reset. The protrusion and the groove edge of the through groove form a stop and limit.

[0013] In the fluid supply cup described above, the anti-detachment structure includes an elastic element protruding from the outer edge of the cup lid, the elastic element being arranged on the extension line of the tail end of the snap-fit ​​element, a plurality of raised lines protruding from the annular surface of the rigid outer cup, the plurality of raised lines being arranged on the extension line of the screw-out of the locking groove, the elastic element protruding a wavy edge towards the lower edge of the raised line, the snap-fit ​​element being screwed into the locking groove, and the wavy edge engaging the raised line.

[0014] In the fluid supply cup described above, the anti-detachment structure includes several protruding tabs protruding from the inner wall of the rigid outer cup. The protruding tabs protrude toward the center of the cup opening of the rigid outer cup. The several protruding tabs are arranged on the extension line of the locking groove. The protruding tabs are flush with the arc-shaped protrusion of the locking groove. The locking element is screwed out of the locking groove. The lower helical surface of the locking element moves along the several protruding tabs to form a damping force.

[0015] A method of using a fluid supply cup, wherein when the snap-fit ​​element of the cup lid enters the clearance fit area, the anti-dislodgement structure generates a damping force.

[0016] Preferably, the snap-fit ​​element on the cup lid gradually enters the clearance fit area, and the first mechanical feature of the snap-fit ​​element generates a damping force with the second mechanical feature on the cup opening or the locking groove.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. When the anti-detachment structure is fitted in the clearance fit area, the snap-fit ​​element enters the clearance fit area of ​​the locking groove and forms a snap-fit ​​limit, thereby achieving an anti-detachment effect within the locking groove. When the anti-detachment structure is fitted on the outside of the locking groove, the snap-fit ​​element forms a snap-fit ​​limit before entering the locking groove, thereby achieving an anti-detachment effect after extending out of the locking groove. When the anti-detachment structure is simultaneously arranged on the outside of the locking groove and the clearance fit area, the snap-fit ​​element engages before entering the locking groove to provide positioning guidance, facilitating accurate insertion of the snap-fit ​​element into the locking groove. After entering the locking groove, the snap-fit ​​element still forms a snap-fit ​​limit, thereby achieving an anti-detachment effect both inside and outside the locking groove.

[0019] 2. The anti-detachment structure uses interlocking and damping forces to form a stop and limit, creating a reliable anti-detachment connection between the cup lid and the outer cup. This prevents the cup lid from accidentally detaching from the outer cup during use, and also prevents the cup lid from separating from the outer cup before separating from the spray gun during the removal of the supply cup, ensuring safe use.

[0020] 3. The locking element and the locking groove limit fit and locking fit are arranged separately to achieve a sequential fit. Thus, when the locking element is screwed into the locking groove, the screwing force first overcomes the blocking force of the anti-dislodgement structure, and then forms a lock with the thread structure. This avoids the assembly difficulties caused by the screwing force facing two compound resistances at the same time, and improves the smoothness and efficiency of assembly.

[0021] 4. Through the cooperation between the locking groove of the rigid outer cup and the snap-fit ​​element of the cup lid, the anti-drop structure achieves the guiding or limiting function, and then gradually transitions from the clearance fit area to the locking fit area to form an effective sealing structure, ensuring that the fluid supply cup will not leak during use and maintaining a stable fluid supply.

[0022] In summary, this invention has beneficial effects such as good sealing performance, anti-detachment function, structural stability, and convenient operation, which improves the user experience and safety. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the open state according to the first specific embodiment of the present invention.

[0024] Figure 2 This is a partially enlarged three-dimensional cross-sectional view of the closed state according to the first specific embodiment of the present invention.

[0025] Figure 3 This is an enlarged bottom view of the locking slot in the open state, according to the first specific embodiment of the present invention.

[0026] Figure 4 This is an enlarged bottom view of the locking fit within the locking slot in the closed state, according to the first specific embodiment of the present invention.

[0027] Figure 5 This is a three-dimensional structural diagram of the open state according to a second specific embodiment of the present invention.

[0028] Figure 6 This is a partially enlarged perspective view of the stop state on the extended spiral line, according to the second specific embodiment of the present invention.

[0029] Figure 7 This is a partially enlarged perspective view of the second specific embodiment of the present invention in the closed state.

[0030] Figure 8 This is a three-dimensional structural diagram of the open state according to a third specific embodiment of the present invention.

[0031] Figure 9 This is a partially enlarged cross-sectional perspective view of the third specific embodiment of the present invention in the open state.

[0032] Figure 10This is a partially enlarged sectional perspective view of the third specific embodiment of the present invention in the closed state.

[0033] Figure 11 This is a three-dimensional structural diagram of the open state according to the fourth specific embodiment of the present invention.

[0034] Figure 12 This is a partially enlarged perspective view of the fourth specific embodiment of the present invention in the open state.

[0035] Figure 13 This is a partially enlarged perspective view of the fourth specific embodiment of the present invention in the closed state.

[0036] Figure 14 This is a three-dimensional structural diagram of the open state according to the fifth specific embodiment of the present invention.

[0037] Figure 15 This is a partially enlarged cross-sectional perspective view of the fifth specific embodiment of the present invention in the open state.

[0038] Figure 16 This is a partially enlarged sectional perspective view of the fifth specific embodiment of the present invention in the closed state.

[0039] Figure 17 This is an enlarged perspective view of the interior in the open state of the fifth specific embodiment of the present invention.

[0040] Figure 18 This is an enlarged perspective view of the interior in the closed state of the fifth specific embodiment of the present invention.

[0041] Figure 19 This is a three-dimensional structural diagram of the open state according to the sixth specific embodiment of the present invention.

[0042] Figure 20 This is a three-dimensional structural diagram of the closed state according to the sixth specific embodiment of the present invention.

[0043] Figure 21 This is a partially enlarged three-dimensional structural diagram of the sixth specific embodiment of the present invention in the closed state.

[0044] Figure 22 This is a three-dimensional structural diagram of the open state according to the seventh specific embodiment of the present invention.

[0045] Figure 23 This is a three-dimensional structural diagram of the closed state according to the seventh specific embodiment of the present invention. Detailed Implementation

[0046] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0047] like Figures 1 to 23As shown, a fluid supply cup includes a rigid outer cup 1 and a cup lid 2 that are adapted to each other. The mouth of the rigid outer cup 1 is provided with a number of locking slots. The outer edge of the cup lid 2 is provided with a number of snap-fit ​​elements 5. The snap-fit ​​elements 5 can be inserted into the corresponding locking slots to connect the rigid outer cup 1 and the cup lid 2. An anti-dislodgement structure is provided between the snap-fit ​​elements 5 and the corresponding locking slots. The snap-fit ​​elements 5 are screwed into the locking slots. The snap-fit ​​elements 5 gradually transition from the clearance fit area to the locking fit area. The damping force of the anti-dislodgement structure is engaged in the clearance fit area.

[0048] The clearance fit zone specifically refers to the gap between the snap-fit ​​element 5 and the corresponding locking groove along the circumference of the rigid outer cup when they are engaged. This means that the snap-fit ​​element 5 is not yet axially clamped by the locking groove, and it still has a certain amount of axial movement. The locking fit zone specifically refers to the tight fit between the snap-fit ​​element 5 and the corresponding locking groove along the axis of the rigid outer cup when they are engaged. This means that the snap-fit ​​element 5 is axially clamped by the locking groove, preventing it from moving axially.

[0049] One approach is that the clearance fit area is continuously connected to the locking fit area via a transition, meaning that the snap-fit ​​element 5 and the corresponding locking groove first undergo an anti-loosening fit before the locking fit. Another approach is that a portion of the clearance fit area overlaps with a portion of the locking fit area, meaning that the snap-fit ​​element 5 and the corresponding locking groove simultaneously enter the locking fit state while forming an anti-loosening fit.

[0050] The engagement of the snap-fit ​​element 5 with the locking slot can adopt a spiral wedge structure, where the locking slot is a spiral wedge groove and the snap-fit ​​element 5 is a spiral wedge element. The spiral wedge groove forms an insertion opening or locking start at the end of the clearance fit area, and a locking end at the end of the locking fit area. The height of the groove gradually decreases from the insertion opening to the locking end through a threaded bevel. Specifically, the spiral wedge element is a threaded segment. The front end 5a of the threaded segment is a thinner end, facing the insertion end of the spiral wedge groove; the tail end 5b of the threaded segment is a thicker end, facing away from the exit end of the spiral wedge groove. The thicker end gradually transitions to the thinner end through the threaded bevel. The spiral direction of the spiral wedge element and the spiral wedge groove is consistent, and several snap-fit ​​elements 5 and several locking slots form a one-to-one threaded engagement.

[0051] The engagement of the snap-fit ​​element 5 with the locking slot can also be achieved by a horizontal insertion method, that is, the locking slot is a horizontal curved slot and the snap-fit ​​element 5 is a horizontal curved plug. The horizontal curved plug is gradually screwed into the horizontal curved slot, and the locking assembly is achieved by gradually increasing the degree of engagement between the two.

[0052] The snap-fit ​​element 5 is provided with a first mechanical feature, and the cup mouth or locking groove is provided with a second mechanical feature that is compatible with the first mechanical feature; the first mechanical feature and the second mechanical feature form the above-mentioned anti-detachment structure; the snap-fit ​​element is screwed into the locking groove, and the snap-fit ​​element gradually transitions from the clearance fit area to the locking fit area, and the damping forces of the first mechanical feature and the second mechanical feature are matched in the clearance fit area.

[0053] The locking fit zone refers to the stroke from when the corresponding surface of the snap-fit ​​element 5 and the corresponding surface of the locking groove begin to generate interference friction until locking. The clearance fit zone refers to the stroke from when the first mechanical feature and the second mechanical feature generate damping force.

[0054] The first mechanical feature can take various structural forms, and the second mechanical feature has a corresponding structural form for the first mechanical feature. Regardless of the structural form, as long as the first and second mechanical features cooperate to achieve the effect of preventing the lid 2 from falling off the rigid outer cup 1, the first and second mechanical features can adopt various cooperation methods, that is, they are not limited to the specific method listed in the embodiments. In addition, the positions of the first and second mechanical features can be interchanged, as long as they can achieve an adaptive cooperation.

[0055] Preferably, the fluid supply cup also includes a liner 3 with a flange, the cup lid 2 is adapted to the liner 3, and the inner wall of the rigid outer cup 1 is provided with an annular surface 1a for placing the flange of the liner 3 at the corresponding position. The inner peripheral wall of the rigid outer cup 1 is provided with a plurality of arc-shaped protrusions 4, and the surface of the arc-shaped protrusions 4 facing the annular surface 1a forms an upper spiral surface. A locking groove is formed between the upper spiral surface, the inner wall of the rigid outer cup 1 and the annular surface 1a. A snap-fit ​​element 5 protrudes from the outer edge of the cup lid 2. The upper surface of the snap-fit ​​element 5 is a lower spiral surface. The snap-fit ​​element 5 is screwed into the locking groove, and the lower spiral surface gradually fits the upper spiral surface to form a locking fit.

[0056] The top surface of the toroidal surface 1a is a horizontal plane. This horizontal plane mates with the upper spiral surface of the arc-shaped protrusion 4 to form a locking groove with a wide gap at one end and a narrow gap at the other. The wider end of the locking groove forms a screw-in opening, while the narrower end is fitted with a sealing portion to form a locking end. This sealing portion prevents the locking element 5 from dislodging from the locking groove due to excessive twisting. The groove gradually transitions from the wider end to the narrower end, that is, it gradually changes from a clearance fit area to a locking fit area. The change in area is determined by the fit clearance between the locking groove and the locking element 5. The length of the locking groove is greater than the length of the locking element 5, allowing the locking element 5 to make the necessary twisting movement along the locking groove.

[0057] Preferably, the center of the cup lid 2 has a protruding liquid supply port 2a, and the outer wall of the liquid supply port 2a has a protruding thread 2b, which is consistent with the spiral direction of the snap-fit ​​element 5.

[0058] A method of using a fluid supply cup, wherein when the snap-fit ​​element 5 of the cup lid 2 enters the clearance fit area, the anti-dislodgement structure generates a damping force.

[0059] The damping force of the anti-detachment structure is generated during assembly or disassembly, as follows:

[0060] The steps include assembling the fluid supply cup: when the snap-fit ​​element 5 enters the clearance fit area, the anti-dislodgement structure generates a damping force, and the snap-fit ​​element 5 is continuously screwed on, and the snap-fit ​​element 5 gradually moves from the clearance fit area into the locking fit area until the snap-fit ​​element 5 is locked with the locking groove.

[0061] The process includes the following steps for disassembling the fluid supply cup: when the snap-fit ​​element 5 moves from the locking mating area to the clearance mating area, the anti-dislodgement structure generates a damping force to prevent the snap-fit ​​element 5 from falling off quickly.

[0062] As the snap-fit ​​element 5 on the cup lid 2 gradually enters the clearance fit area, the first mechanical feature of the snap-fit ​​element 5 generates a damping force with the second mechanical feature on the cup mouth or locking groove.

[0063] The damping forces of the first and second mechanical features are generated during assembly or disassembly, as follows:

[0064] The process includes the following steps for assembling the fluid supply cup: As the cup lid 2 rotates, the snap-fit ​​element 5 on the cup lid 2 gradually enters the clearance fit area, and the first mechanical feature of the snap-fit ​​element 5 generates a damping force with the second mechanical feature on the cup mouth or locking groove; as the snap-fit ​​element 5 continues to be screwed, the snap-fit ​​element 5 gradually moves from the clearance fit area into the locking fit area until the snap-fit ​​element 5 is locked with the locking groove.

[0065] It should be noted that when assembling the cup lid 2 and the rigid outer cup 1, a limiting fit is performed first, followed by a locking fit. The limiting fit and the locking fit can be completed sequentially in two different areas, or they can be completed simultaneously in the overlapping part of the two areas.

[0066] The process includes the following steps for disassembling the fluid supply cup: When the snap-fit ​​element 5 moves from the locking fit area into the clearance fit area, the first mechanical feature of the snap-fit ​​element 5 generates a damping force with the second mechanical feature on the cup opening or the locking groove, preventing the snap-fit ​​element 5 from falling off quickly.

[0067] It is important to note that when the cup lid 2 and the rigid outer cup 1 are separated, the locking fit is disengaged first, and then the limiting fit is disengaged. The release of the locking and the release of the limiting can be completed in two different stages, and the release of the locking and the release of the limiting can also be completed simultaneously in the overlapping part of the two areas.

[0068] like Figures 1 to 4As shown, one embodiment includes a protruding ridge 6 on the inner wall of the rigid outer cup 1. This ridge 6 is the second mechanical feature. The ridge 6 is located on the inner wall of the rigid outer cup 1 in the clearance fit area. Of course, the ridge 6 can be located on the inner wall of the rigid outer cup 1 below the arc-shaped protrusion 4 of the locking groove, or it can be located on the inner wall of the rigid outer cup 1 outside the coverage area of ​​the arc-shaped protrusion 4 of the locking groove. The ridge 6 protrudes towards the center of the cup opening of the rigid outer cup 1. A first mechanical feature is provided on the outer edge of the locking element 5. The first mechanical feature includes a first-level step 7 and a second-level step 9 from the screw-in end. The width of the outer edge of the first-level step 7 is greater than the width of the outer edge of the second-level step 9. The first-level step 7 is used to form a limiting engagement with the arc-shaped protrusion 4 in the axial direction. By increasing the length of the first-level step 7, the engagement area with the arc-shaped protrusion 4 is increased to prevent the cup lid 2 from being squeezed and separated from the rigid outer cup 1 due to plastic deformation of the material. The step difference between the first-level step 7 and the second-level step 9 forms a step section 8, which is specifically the vertical surface between the first-level step 7 and the second-level step 9. This vertical surface serves as a stop and limit mechanism. The locking element 5 is screwed into the locking groove, and the first-level step 7 and the protrusion 6 form a damping force. As the screwing continues, the first-level step 7 disengages from the protrusion 6, and the outer edge of the second-level step 9 forms a clearance fit with the protrusion. The upper surface of the second-level step 9 (i.e., the lower helical surface) forms an interference fit with the upper helical surface.

[0069] The outer surface of the protruding rib 6 is an arc surface, and the step part 8 has an arc chamfer. While ensuring the function of limiting and stopping, both can be engaged or disengaged through the arc transition when subjected to external force for twisting.

[0070] During the assembly process of the cup lid 2 and the rigid outer cup 1, the screw-in end of the snap-fit ​​element 5 first enters the locking groove. The first-level step 7 contacts and presses against the protrusion 6, generating a damping force. That is, the snap-fit ​​element 5 begins to enter the clearance fit area until the first-level step 7 and the protrusion 6 no longer generate a damping force, at which point the snap-fit ​​element 5 leaves the clearance fit area. Under the action of torque, friction is overcome so that the first-level step 7 passes through the protrusion 6. Then, the protrusion 6 passes through the step 8 and there is a gap between it and the outer edge of the second-level step 9. There is no pressing action between the protrusion 6 and the second-level step 9. At this time, the protrusion 6 can contact the step 8 or not. The step 8 between the first-level step 7 and the second-level step 9 acts as a stop for the protrusion 6. At this time, the upper surfaces (i.e., the lower spiral surfaces) of the first-level step 7 and the second-level step 9 contact the upper spiral surface of the arc-shaped protrusion 4 and begin to enter the locking fit area. After a certain stroke, locking is achieved from interference friction.

[0071] The relatively weak separation torque is insufficient to allow the stepped portion 8 to break through the protruding edge 6. Therefore, when the entire supply cup is separated from the spray gun, the step portion 8 and the protruding edge 6 are used to limit the separation, so that the separation torque required between the cup lid 2 and the rigid outer cup 1 is greater than the separation torque required between the cup lid 2 and the spray gun. Thus, when subjected to the separation torque at the same time, it is ensured that the cup lid 2 and the spray gun are preferentially and smoothly unscrewed to complete the separation.

[0072] During the separation of the cup lid 2 from the rigid outer cup 1, the tail end 5b of the snap-fit ​​element 5 is first rotated and moved outward toward the screw-in opening of the locking groove. At this time, the snap-fit ​​element 5 gradually disengages from the locking mating area. A torque greater than the stopping resistance of the step 8 and the protrusion 6 is applied, causing the step 8 to break through the protrusion 6. Then, the next step 7 contacts and squeezes the protrusion 6 to rotate outward while generating a damping force. The snap-fit ​​element 5 begins to gradually disengage from the clearance mating area until the snap-fit ​​element 5 is completely screwed out of the locking groove, thus separating the cup lid 2 from the rigid outer cup 1.

[0073] like Figures 5 to 7 As shown, in one embodiment, the anti-detachment structure includes at least one protrusion 10 protruding from the inner wall of the rigid outer cup 1. The protrusion 10 is the second mechanical feature. The protrusion 10 is located on the inner wall of the rigid outer cup 1 along the extension line of the locking groove. The protrusion 10 protrudes toward the center of the cup opening of the rigid outer cup 1. At least one groove 11 is provided on the outer edge of the locking element 5. The groove 11 is the first mechanical feature. The protrusion 10 can be embedded in the groove 11. The locking element 5 is screwed into the locking groove. The protrusion 10 and the tail end 5b of the locking element 5 form a stop and limit.

[0074] The number of protrusions 10 is one, which is located outside the locking groove; the number of grooves 11 is two, and an isolation gap is set between the two grooves 11. The side of the protrusion 10 facing the groove 11 has a semi-circular convex surface, and the groove 11 facing the protrusion 10 has a corresponding semi-circular concave surface. While ensuring the locking and limiting function, the two can be locked or disengaged through an arc transition when subjected to external force and twisting.

[0075] During the assembly process of the cup lid 2 and the rigid outer cup 1, the screw-in end of the snap-fit ​​element 5 first enters the locking groove. The foremost groove 11 first forms a snap-fit ​​with the protrusion 10 on the outside of the locking groove (that is, the snap-fit ​​element 5 begins to enter the clearance fit area until all the grooves 11 and the protrusion 10 no longer generate damping force, then the snap-fit ​​element 5 leaves the clearance fit area; of course, the snap-fit ​​element 5 can also be located in the clearance fit area, and the cup lid 2 and the rigid outer cup 1 are locked). As it rotates and moves, the two grooves 11 successively overcome the limiting snap-fit ​​of the outer protrusion 10. Then the snap-fit ​​element 5 enters the locking fit area of ​​the locking groove to form a lock (that is, the lower spiral surface of the snap-fit ​​element 5 and the upper spiral surface of the locking groove begin to generate interference friction until the lock is locked). At this time, the protrusion 10 stops and limits the tail end 5b of the snap-fit ​​element 5, and the protrusion 10 forms an anti-disengagement limiting effect on the outside of the locking groove.

[0076] During the separation of the cup lid 2 from the rigid outer cup 1, the tail end 5b of the snap-fit ​​element 5 is first rotated and moved towards the outside of the screw-in opening of the locking groove. At this time, the snap-fit ​​element 5 gradually disengages from the locking mating area. Then, the two grooves 11 are sequentially engaged with and disengaged from the protrusions 10 on the outside of the locking groove, which is the process of the snap-fit ​​element 5 disengaging from the clearance mating area, until the snap-fit ​​element 5 is completely screwed out of the locking groove to separate the cup lid 2 from the rigid outer cup 1.

[0077] One embodiment is that the anti-detachment structure includes at least one protruding rib on the lower spiral surface of the snap-fit ​​element 5, which is the first mechanical feature. At least one snap-fit ​​groove is correspondingly provided on the arc-shaped protrusion 4, which is the second mechanical feature. The snap-fit ​​element 5 is screwed into the locking groove, and the protruding rib is correspondingly embedded in the snap-fit ​​groove.

[0078] The rib and the slot can be fitted together in the following two ways:

[0079] One type is, such as Figures 8 to 10 As shown, three protruding ribs 12 and three corresponding slots 13 are arranged in a row. The protruding ribs 12 have an arc-shaped top surface, and the slots 13 are recessed on the upper spiral surface of the arc-shaped protrusion 4. The slots 13 have a circular arc groove wall. While ensuring the locking and limiting function, both can be locked or disengaged through the circular arc transition when subjected to external force and twisting.

[0080] During the assembly process of the cup lid 2 and the rigid outer cup 1, the screw-in end of the snap-fit ​​element 5 first enters the locking groove. The specific process of the snap-fit ​​element 5 entering the clearance fit area is as follows: the arc-shaped top surfaces of the three protrusions 12 gradually contact and press the upper spiral surface. During the turning movement, the first protrusion 12 first enters the last snap groove 13. At this time, the anti-disengagement and limiting function of the first protrusion 12 and the snap groove 13 has been achieved. At this time, the snap-fit ​​element 5 and the locking groove are in clearance fit. Then, the snap-fit ​​element 5 begins to enter the locking fit area while still being in the clearance fit area, until the three protrusions 12 are correspondingly snapped into the three snap grooves 13. This achieves multiple anti-disengagement and limiting functions, and also causes the lower spiral surface of the snap-fit ​​element 5 to produce interference friction with the upper spiral surface of the locking groove until it is locked.

[0081] During the separation of the cup lid 2 from the rigid outer cup 1, the tail end 5b of the snap-fit ​​element 5 is first rotated and moved towards the outside of the screw-in opening of the locking groove. At this time, the snap-fit ​​element 5 gradually disengages from the locking mating area. The three protruding ribs 12 are gradually squeezed to separate from the upper spiral surface and the three snap-fit ​​grooves 13, which is the process of the snap-fit ​​element 5 disengaging from the gap mating area, until the snap-fit ​​element 5 is completely screwed out of the locking groove to separate the cup lid 2 from the rigid outer cup 1.

[0082] Another type is, such as Figures 11 to 13 As shown, two protruding ribs 14 are arranged side by side on the snap-fit ​​element 5. Several snap-fit ​​grooves 15 are continuously arranged on the edge of the arc-shaped protrusion 4 facing the center of the cup mouth. The side of the protruding rib 14 facing the snap-fit ​​groove 15 has an arc-shaped convex wall surface, and the snap-fit ​​groove 15 has an arc-shaped concave wall surface corresponding to the protruding rib 14. While ensuring the snap-fit ​​and limiting function, both can be snapped in or out through the arc transition when subjected to external force and twisted.

[0083] During the assembly of the cup lid 2 and the rigid outer cup 1, the specific process of the locking element 5 entering the clearance fit area is as follows: First, the screw-in end of the locking element 5 enters the locking groove, and the two convex surfaces of the two protruding ribs 14, which are plastically deformed, enter the locking groove 15 in sequence. At this time, the protruding ribs 14 and the locking groove 15 achieve the anti-disengagement and limiting function. Then, while the locking element 5 is entering the locking fit area, it is still in the clearance fit area. During the turning movement, the lower spiral surface of the locking element 5 and the upper spiral surface of the locking groove begin to generate interference friction until locking.

[0084] During the separation of the cup lid 2 from the rigid outer cup 1, the tail end 5b of the snap-fit ​​element 5 is first rotated and moved outward toward the outside of the screw-in opening of the locking groove. At this time, the snap-fit ​​element 5 gradually disengages from the locking mating area. Simultaneously, the arc-shaped convex surfaces of the two protruding ribs 14 move outward along several slots 15 in sequence. The two protruding ribs 14 first separate from the slots 15, which is the process of the snap-fit ​​element 5 disengaging from the clearance mating area. Then, the snap-fit ​​element 5 is completely screwed out of the locking groove to separate the cup lid 2 from the rigid outer cup 1.

[0085] like Figures 14 to 18 As shown, one embodiment includes an anti-detachment structure comprising an elastic sheet 16 protruding from the outer edge of the cup lid 2. The elastic sheet 16 is arranged on the extension line of the tail end 5b of the snap-fit ​​element 5. A through groove 1b is provided on the annular surface 1a corresponding to the arc-shaped protrusion 4. This through groove 1b is the second mechanical feature. A protrusion 16a is provided on the lower surface of the elastic sheet 16 facing the through groove 1b. The elastic sheet 16 and the protrusion 16a are the first mechanical features. The snap-fit ​​element 5 is screwed into the locking groove. The annular surface 1a presses the protrusion 16a, causing the elastic sheet 16 to undergo elastic deformation. The protrusion 16a moves into the through groove 1b, causing the elastic sheet 16 to reset. The protrusion 16a and the groove edge of the through groove 1b form a stop and limit.

[0086] The tail end 5b of the snap-fit ​​element 5 is away from its screw-in end. The elastic piece 16 protrudes from the outer edge of the cup lid 2. A separation notch is provided between the elastic piece 16 and the tail end 5b of the snap-fit ​​element 5 to facilitate independent elastic deformation of the elastic piece 16. The protrusion 16a has a spherical surface, which forms a point contact with the annular surface 1a to facilitate sliding friction after contact. When subjected to external force and twisted, it can disengage from the groove edge of the through groove 1b through the spherical surface transition.

[0087] During the assembly of the cup lid 2 and the rigid outer cup 1, the bottom surface of the snap-fit ​​element 5 is screwed into the locking groove along the annular surface 1a. The specific process of the snap-fit ​​element 5 entering the clearance fit area is as follows: the protrusion 16a on the bottom surface of the elastic sheet 16 slides and moves against the annular surface 1a. Because the bottom surface of the elastic sheet 16 is flush with the bottom surface of the snap-fit ​​element 5, the height of the protrusion 16a is used to push and lift the elastic sheet 16, causing elastic deformation. After moving a certain distance, the protrusion 16a reaches the position of the through groove 1b. The elastic sheet 16 recovers its elastic deformation, making its bottom surface flush with the annular surface 1a, causing the protrusion 16a to fall into the through groove 1b and form a height limit with the edge of the through groove 1b, thus achieving the anti-disengagement function. When the snap-fit ​​element 5 is located in the latter part of the clearance fit area or has disengaged from the clearance fit area, the snap-fit ​​element 5 enters the locking fit area, causing its lower spiral surface to begin to generate interference friction with the upper spiral surface of the locking groove until it is locked.

[0088] During the separation of the cup lid 2 from the rigid outer cup 1, the tail end 5b of the snap-fit ​​element 5 is first rotated and moved towards the outside of the screw-in opening of the locking groove. At this time, the snap-fit ​​element 5 gradually disengages from the locking mating area. The spherical surface of the protrusion 16a contacts the groove edge of the through groove 1b. Under the continuous twisting action of the external force, the protrusion 16a is forced to lift the elastic piece 16 through the groove edge. Then, the snap-fit ​​element 5 is completely screwed out of the locking groove to separate the cup lid 2 from the rigid outer cup 1, that is, the process of the snap-fit ​​element 5 disengaging from the clearance mating area.

[0089] like Figures 19 to 21As shown, one embodiment is that the anti-detachment structure includes an elastic member 17 protruding from the outer edge of the cup lid 2. The elastic member 17 is arranged on the extension line of the tail end 5b of the snap-fit ​​element 5. Several raised lines 18 protrude on the annular surface 1a. These raised lines 18 are the second mechanical features. The several raised lines 18 are arranged on the extension line of the locking groove. The elastic member 17 protrudes a wavy edge 17a towards the lower edge of the raised lines 18. The elastic member 17 and the wavy edge 17a are the first mechanical features. The snap-fit ​​element 5 is screwed into the locking groove, and the wavy edge 17a engages with the raised lines 18.

[0090] The tail end 5b of the snap-fit ​​element 5 is away from its screw-in end. The elastic element 17 protrudes from the outer edge of the cup lid 2. A separation notch is provided between the elastic element 17 and the tail end 5b of the snap-fit ​​element 5 to facilitate independent elastic deformation of the elastic element 17. Several raised lines 18 are arranged in parallel. The spacing between adjacent crests of the wave edge 17a matches the spacing between adjacent raised lines 18. In the free state, the crest of the wave edge 17a extends beyond the lower surface of the snap-fit ​​element 5. The raised lines 18 have an arc-shaped top surface to match the wave edge 17a. When subjected to external force and twisted, the two can achieve engagement or disengagement through an arc transition.

[0091] During the assembly of the cup lid 2 and the rigid outer cup 1, the specific process of the snap-fit ​​element 5 entering the clearance fit area is as follows: the bottom surface of the snap-fit ​​element 5 is screwed into the locking groove along the annular surface 1a. When the crest of the wave 17a encounters the convex line 18, the height of the convex line 18 causes the elastic element 17 to be pushed up and elastically deformed. When the crest of the wave 17a enters the gap between adjacent convex lines 18, the elastic element 17 sinks and recovers its elastic deformation, causing the wave 17a to engage with the convex line 18, thus achieving the anti-disengagement function. When the snap-fit ​​element 5 is located in the latter part of the clearance fit area or is disengaged from the clearance fit area, the snap-fit ​​element 5 enters the locking fit area, causing its lower spiral surface to begin to generate interference friction with the upper spiral surface of the locking groove until it is locked.

[0092] During the separation of the cup lid 2 from the rigid outer cup 1, the tail end 5b of the snap-fit ​​element 5 is first rotated and moved towards the outside of the screw-in opening of the locking groove. At this time, the snap-fit ​​element 5 gradually disengages from the locking mating area. Under the continuous twisting action of the external force, the wave is forced to lift the elastic element 17 along 17a and pass through the convex line 18 one by one. Then the snap-fit ​​element 5 is completely screwed out of the locking groove to realize the separation of the cup lid 2 from the rigid outer cup 1, that is, the process of the snap-fit ​​element 5 disengaging from the clearance mating area.

[0093] like Figure 22 and 23As shown, one embodiment includes an anti-detachment structure comprising several protruding tabs 19 protruding from the inner wall of a rigid outer cup 1. These protruding tabs 19 constitute the second mechanical feature. The protruding tabs 19 protrude towards the center of the cup opening of the rigid outer cup 1. The several protruding tabs 19 are arranged on the extension line of the locking groove. The protruding tabs 19 are flush with the arc-shaped protrusion 4. The locking element 5 is screwed out of the locking groove, and the lower spiral surface of the locking element 5 moves along the several protruding tabs 19 to generate a damping force. This damping force can be the frictional force generated by the contact between the locking element 5 and the several protruding tabs 19. At this time, the lower spiral surface of the locking element 5 forms the first mechanical feature. The protruding tabs 19 are semi-circular pieces, and three protruding tabs 19 are provided for each locking groove, with the three protruding tabs 19 arranged at equal intervals.

[0094] During the assembly of the cup lid 2 and the rigid outer cup 1, the specific process of the snap-fit ​​element 5 entering the clearance fit area is as follows: the snap-fit ​​element 5 is first screwed between the three protrusions 19 and the annular surface 1a. After being guided by the three protrusions 19, the snap-fit ​​element 5 enters the locking fit area, causing its lower helical surface to begin to generate interference friction with the upper helical surface of the locking groove until it is locked. During the separation of the cup lid 2 and the rigid outer cup 1, the tail end 5b of the snap-fit ​​element 5 is first rotated and moved towards the outside of the screw-in opening of the locking groove. At this time, the snap-fit ​​element 5 gradually disengages from the locking fit area. After the snap-fit ​​element 5 is screwed out of the locking groove, the three protrusions 19 further restrict the axial stop of the snap-fit ​​element 5 to increase the disengagement stroke. The cup lid 2 is then screwed on until the snap-fit ​​element 5 completely separates from the rigid outer cup 1 through the three protrusions 19, which is the process of the snap-fit ​​element 5 disengaging from the clearance fit area.

Claims

1. A fluid supply cup, comprising a fitted rigid outer cup and a cup lid, wherein the mouth of the rigid outer cup is provided with a plurality of locking slots, and the outer edge of the cup lid is provided with a plurality of snap-fit ​​elements corresponding to each other, the snap-fit ​​elements being able to be inserted into the corresponding locking slots to connect the rigid outer cup and the cup lid, characterized in that, An anti-dislodgement structure is provided between the snap-fit ​​element and the corresponding locking groove. The snap-fit ​​element is screwed into the locking groove. The snap-fit ​​element gradually transitions from the clearance fit area to the locking fit area. The damping force of the anti-dislodgement structure is engaged in the clearance fit area. The clearance fit area is continuously connected to the locking fit area through a transition. The snap-fit ​​element and the corresponding locking groove first undergo anti-dislodgement engagement and then lock engagement.

2. The fluid supply cup according to claim 1, characterized in that, The snap-fit ​​element is provided with a first mechanical feature, and the cup opening or the locking groove is provided with a second mechanical feature that is adapted to the first mechanical feature; the first mechanical feature and the second mechanical feature form the above-mentioned anti-detachment structure; The snap-fit ​​element is screwed into the locking groove, and the snap-fit ​​element gradually transitions from the clearance fit area to the locking fit area. The damping forces of the first mechanical feature and the second mechanical feature are engaged in the clearance fit area.

3. The fluid supply cup as described in claim 2, characterized in that, The anti-detachment structure includes a protruding ridge on the inner wall of the rigid outer cup. The ridge is located on the inner wall of the rigid outer cup in the clearance fit area. The ridge protrudes towards the center of the cup opening of the rigid outer cup. The outer edge of the locking element is provided with a first-level step and a second-level step sequentially from the screw-in end. The step difference between the first-level step and the second-level step forms a step portion. The locking element is screwed into the locking groove. The first-level step and the ridge form a damping force.

4. The fluid supply cup as described in claim 2, characterized in that, The anti-detachment structure includes at least one protrusion on the inner wall of the rigid outer cup. The protrusion is located on the inner wall of the rigid outer cup along the extension line of the locking groove. The protrusion protrudes toward the center of the cup opening of the rigid outer cup. At least one groove is provided on the outer edge of the snap-fit ​​element. The protrusion can be embedded in the groove. The snap-fit ​​element is screwed into the locking groove. The protrusion and the tail end of the snap-fit ​​element form a stop and limit.

5. The fluid supply cup as described in claim 2, characterized in that, The anti-detachment structure includes at least one protruding rib on the lower spiral surface of the snap-fit ​​element, and at least one corresponding slot on the arc-shaped protrusion of the locking groove. The snap-fit ​​element is screwed into the locking groove, and the protruding rib is correspondingly embedded in the slot.

6. The fluid supply cup as described in claim 2, characterized in that, The anti-detachment structure includes an elastic sheet protruding from the outer edge of the cup lid. The elastic sheet is arranged on the extension line of the tail end of the snap-fit ​​element. The circumferential surface of the rigid outer cup is provided with a through groove corresponding to the arc-shaped protrusion of the locking groove. The elastic sheet is provided with a protrusion on the lower surface facing the through groove. The snap-fit ​​element is screwed into the locking groove. The circumferential surface presses the protrusion, causing the elastic sheet to undergo elastic deformation. The protrusion moves into the through groove, causing the elastic sheet to reset. The protrusion and the groove edge of the through groove form a stop and limit.

7. The fluid supply cup as described in claim 2, characterized in that, The anti-detachment structure includes an elastic element protruding from the outer edge of the cup lid, the elastic element being arranged on the extension line of the tail end of the snap-fit ​​element, a plurality of raised lines protruding from the annular surface of the rigid outer cup, the plurality of raised lines being arranged on the extension line of the locking groove, the elastic element protruding a wavy edge towards the lower edge of the raised lines, the snap-fit ​​element being screwed into the locking groove, and the wavy edge engaging the raised lines.

8. The fluid supply cup as described in claim 2, characterized in that, The anti-detachment structure includes several protruding tabs protruding from the inner wall of the rigid outer cup. The protruding tabs protrude toward the center of the cup opening of the rigid outer cup. The several protruding tabs are arranged on the extension line of the locking groove. The protruding tabs are flush with the arc-shaped protrusion of the locking groove. The locking element is screwed out of the locking groove. The lower spiral surface of the locking element moves along the several protruding tabs to form a damping force.

Images