Fluid supply cup and use method for fluid supply cup

Abstract

Provided in the present invention are a fluid supply cup and a use method for the fluid supply cup. The fluid supply cup comprises a rigid outer cup and a cup lid that match each other, wherein several locking slots are arranged in the inner circumference of a cup rim of the rigid outer cup, and several engagement elements are correspondingly arranged at the outer edge of the cup lid; the engagement elements can be guided into corresponding locking slots, thus coupling the rigid outer cup to the cup lid. An anti-detachment structure is provided between each engagement element and a corresponding locking slot. When the engagement elements are screwed into the locking slots, each engagement element gradually transitions from a clearance fit area to a locking fit area, and fits with a damping force of the anti-detachment structure in the clearance fit area. The separate arrangement of the limiting fit and locking fit between the engagement elements and the locking slots enables fitting to be implemented sequentially; thus, when each engagement element is screwed out of the locking slot, the screwing force first overcomes a wedge-shaped locking force of a threaded structure, and then overcomes a stopping force of the anti-detachment structure, thereby preventing assembly and disassembly difficulties caused by facing two types of combined resistance forces at the same time, while also preventing the problem of easy separation of the outer cup from the cup lid.

Description

Fluid supply cup and method of using the fluid supply cup Technical Field

[0001] The present invention belongs to the technical field of containers and relates to a fluid storage container for a spray gun, in particular to a fluid supply cup and a method for using 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 atomized by compressed gas and sprayed out.

[0003] A supply cup is composed of three parts: a rigid outer cup, an inner liner, and a cup lid. The cup lid and the inner liner need to be covered, and then the inner liner is placed inside the rigid outer cup. Finally, the rigid outer cup is sealed with the cup lid and assembled into an integrated structure by threaded locking. The cup lid is provided with a liquid supply nozzle connected to the paint storage chamber of the inner liner. The liquid supply nozzle is provided with a threaded structure, and a detachable connection is formed with the liquid inlet of the spray gun through the threaded structure. Because the paint needs to be frequently replaced or replenished, the supply cup needs to be replaced regularly, that is, the liquid supply nozzle of the cup lid and the liquid inlet of the spray gun need to be frequently disassembled. Since the cup lid and the rigid outer cup are also threaded, and the thread rotation direction of the two is the same, when the rigid outer cup is screwed to remove the entire supply cup, the cup lid and the rigid outer cup are also subjected to the screwing and disassembly force. Therefore, in the process of removing the entire supply cup, there is a risk that the cup lid and the rigid outer cup will separate before the cup lid and the spray gun, or the cup lid and the rigid outer cup will become loose, affecting the stability of the supply cup assembly.

[0004] If the cup cover and the rigid outer cup are easily separated, it will affect the replacement operation of the supply cup, and it will easily cause the remaining paint in the lining to leak, reducing the user's operating experience and seriously reducing work efficiency. The leaked paint will contaminate the spray gun and even the sprayed product, causing the product to be scrapped and causing processing accidents.

[0005] Summary of the Invention

[0006] The purpose of the present invention is to address the above-mentioned problems in the existing technology and to provide a fluid supply cup and a method for using the fluid supply cup.

[0007] The objectives of the present invention can be achieved through the following technical solutions: a fluid supply cup, comprising a matching rigid outer cup and a cup cover, a plurality of locking slots being arranged on the cup mouth of the rigid outer cup, a plurality of corresponding snap-fit ​​elements being arranged on the outer edge of the cup cover, the snap-fit ​​elements being able to be introduced into the corresponding locking slots to connect the rigid outer cup and the cup cover, an anti-falling structure being provided between the snap-fit ​​elements and the corresponding locking slots, the snap-fit ​​elements being screwed into the locking slots, the snap-fit ​​elements gradually transitioning from a clearance fit area to a locking fit area, and the damping force of the anti-falling structure being fitted within the clearance fit area.

[0008] In the above-mentioned fluid supply cup, the engaging element is provided with a first mechanical feature, and the cup opening or the locking slot is provided with a second mechanical feature that matches the first mechanical feature; the first mechanical feature and the second mechanical feature form the above-mentioned anti-drop structure;

[0009] The clamping element is screwed into the locking slot, and the clamping element gradually transitions from a clearance fit area to a locking fit area, and the damping forces of the first mechanical feature and the second mechanical feature are matched in the clearance fit area.

[0010] In the above-mentioned fluid supply cup, the anti-falling structure includes a ridge protruding from 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, and the ridge protrudes toward the center of the cup mouth of the rigid outer cup. The outer edge of the clamping element is provided with a first step and a second step in sequence starting from the screw-in end, and the step difference between the first step and the second step forms a step portion. The clamping element is screwed into the locking slot, and the first step and the ridge form a damping force.

[0011] In the above-mentioned fluid supply cup, the anti-falling structure includes at least one protruding block protruding from the inner wall of the rigid outer cup, the protrusion is located on the inner wall of the rigid outer cup on the extension line of the screw-out locking slot, the protrusion protrudes toward the center of the cup mouth of the rigid outer cup, at least one groove is provided on the outer edge of the clamping element, the protrusion can be embedded in the groove, the clamping element is screwed into the locking slot, and the protrusion and the tail end of the clamping element form a stop limit.

[0012] In the above-mentioned fluid supply cup, the anti-fall-off structure includes at least one rib protruding from the lower spiral surface of the snap-fit ​​element, and at least one slot is correspondingly provided on the arc-shaped ridge of the locking slot. The snap-fit ​​element is screwed into the locking slot, and the rib is correspondingly embedded in the slot.

[0013] In the above-mentioned fluid supply cup, the anti-falling structure includes an elastic sheet protruding from the outer edge of the cup cover, and the elastic sheet is arranged on the extension line of the tail end of the clamping element. The annular surface of the rigid outer cup is provided with a through groove corresponding to the arc-shaped convex strip of the locking groove, and the elastic sheet is provided with a protrusion on the lower surface facing the through groove. The clamping element is screwed into the locking groove, and the annular surface squeezes the protrusion to drive the elastic sheet to undergo elastic deformation. The protrusion moves into the through groove to drive the elastic sheet to reset, and the protrusion and the groove edge of the through groove form a stop limit.

[0014] In the above-mentioned fluid supply cup, the anti-falling structure includes an elastic member protruding from the outer edge of the cup cover, and the elastic member is arranged on the extension line of the tail end of the clamping element. A plurality of convex lines protrude from the annular surface of the rigid outer cup, and the plurality of convex lines are arranged on the screw-out extension line of the locking slot. The elastic member protrudes a wavy edge toward the lower edge of the convex line, and the clamping element is screwed into the locking slot, and the wavy edge bites the convex line.

[0015] In the above-mentioned fluid supply cup, the anti-falling structure includes a plurality of protruding pieces protruding from the inner wall of the rigid outer cup, the protruding pieces protruding toward the center of the cup mouth of the rigid outer cup, and the plurality of protruding pieces are arranged on the screw-out extension line of the locking slot, the protruding pieces are flush with the arc-shaped protruding strips of the locking slot, and the clamping element is screwed out of the locking slot, and the lower spiral surface of the clamping element moves along the plurality of protruding pieces to form a damping force.

[0016] A method for using a fluid supply cup. When a clamping element of a cup cover enters a clearance fit area, an anti-falling structure generates a damping force.

[0017] Preferably, the snap-fit ​​element on the cup cover gradually enters the clearance fit area, and the first mechanical feature of the snap-fit ​​element and the second mechanical feature on the cup mouth or the locking slot generate a damping force.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. When the anti-drop-off structure is fitted in the clearance fit area, the clamping element enters the clearance fit area of ​​the locking slot to form a clamping limit, thereby preventing the clamping element from dropping out within the locking slot. When the anti-drop-off structure is fitted on the outside of the locking slot, the clamping element forms a clamping limit before entering the locking slot, thereby preventing the clamping element from dropping out after extending out of the locking slot. When the anti-drop-off structure is arranged on both the outside of the locking slot and the clearance fit area, the clamping element first performs a clamping fit before entering the locking slot to provide a positioning guide, which facilitates the accurate introduction of the clamping element into the locking slot. The clamping element still forms a clamping limit after entering the locking slot, thereby preventing the clamping element from dropping out both inside and outside the locking slot.

[0020] 2. The anti-falling structure adopts concave-convex fitting and damping force to form a stop limit, so that a reliable anti-falling connection is formed between the cup cover and the outer cup, avoiding accidental falling off of the cup cover and the outer cup during use. At the same time, it also prevents the cup cover from separating from the outer cup before separating from the spray gun during the process of removing the supply cup, so as to ensure safe use.

[0021] 3. The limiting cooperation and locking cooperation of the clamping element and the locking slot are arranged separately to realize a sequential and orderly cooperation mode. Therefore, when the clamping element is screwed into the locking slot, the screwing force first overcomes the stopping force of the anti-falling structure, and then forms a lock with the thread structure, thereby avoiding the assembly difficulty caused by the screwing force facing two composite resistances at the same time, and at the same time improving the smoothness and efficiency of the assembly.

[0022] 4. Through the cooperation between the locking groove of the rigid outer cup and the snap-fit ​​element of the cup cover, the anti-fall-off structure is used to achieve a guiding or limiting effect, and then gradually transition 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 maintain a stable supply of fluid.

[0023] In summary, the invention has beneficial effects such as good sealing performance, anti-slip function, structural stability, and easy operation, which improves the user experience and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG1 is a three-dimensional structural diagram of the first embodiment of the present invention in an open state.

[0025] FIG2 is a partially enlarged perspective sectional view of the first embodiment of the present invention in a closed state.

[0026] FIG3 is an enlarged bottom view of the interior of the locking slot in the open state according to the first embodiment of the present invention.

[0027] FIG4 is an enlarged bottom view of the locking fit in the locking groove in the closed state of the first specific embodiment of the present invention.

[0028] FIG5 is a three-dimensional structural diagram of the second specific embodiment of the present invention in an open state.

[0029] FIG6 is a partially enlarged stereoscopic view of the second specific embodiment of the present invention in a stop state on the rotation extension line.

[0030] FIG7 is a partially enlarged three-dimensional view of the second specific embodiment of the present invention in a closed state.

[0031] FIG8 is a three-dimensional structural diagram of the third specific embodiment of the present invention in an open state.

[0032] FIG9 is a partially enlarged sectional stereoscopic view of the third specific embodiment of the present invention in an open state.

[0033] FIG10 is a partially enlarged sectional stereoscopic view of the third specific embodiment of the present invention in a closed state.

[0034] FIG11 is a three-dimensional structural diagram of the fourth specific embodiment of the present invention in an open state.

[0035] FIG12 is a partially enlarged stereoscopic view of the fourth specific embodiment of the present invention in the open state.

[0036] FIG13 is a partially enlarged stereoscopic view of the fourth specific embodiment of the present invention in a closed state.

[0037] FIG14 is a three-dimensional structural diagram of the fifth specific embodiment of the present invention in an open state.

[0038] FIG15 is a partially enlarged sectional stereoscopic view of the fifth specific embodiment of the present invention in an open state.

[0039] FIG16 is a partially enlarged sectional stereoscopic view of the fifth specific embodiment of the present invention in a closed state.

[0040] FIG17 is an enlarged internal stereoscopic view of the fifth specific embodiment of the present invention in the open state.

[0041] FIG18 is an enlarged perspective view of the interior of the fifth embodiment of the present invention in a closed state.

[0042] FIG19 is a three-dimensional structural diagram of the sixth specific embodiment of the present invention in an open state.

[0043] FIG20 is a three-dimensional structural diagram of a sixth specific embodiment of the present invention in a closed state.

[0044] FIG21 is a partially enlarged three-dimensional structural diagram of the sixth specific embodiment of the present invention in a closed state.

[0045] FIG22 is a three-dimensional structural diagram of the seventh specific embodiment of the present invention in an open state.

[0046] FIG23 is a three-dimensional structural diagram of a seventh specific embodiment of the present invention in a closed state. DETAILED DESCRIPTION

[0047] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0048] As shown in Figures 1 to 23, this fluid supply cup includes a matching rigid outer cup 1 and a cup cover 2. A number of locking slots are arranged on the cup mouth of the rigid outer cup 1, and a number of snap-fit ​​elements 5 are correspondingly arranged on the outer edge of the cup cover 2. The snap-fit ​​elements 5 can be introduced into the corresponding locking slots to connect the rigid outer cup 1 and the cup cover 2. An anti-falling 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, and the snap-fit ​​elements 5 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.

[0049] The clearance fit region specifically refers to the gap between the clamping element 5 and the corresponding locking slot when they are mated, along the circumferential direction of the rigid outer cup. This means that the clamping element 5 is not yet axially clamped by the locking slot and still has a certain amount of axial movement. The locking fit region specifically refers to the tight fit between the clamping element 5 and the corresponding locking slot when they are mated, along the axial direction of the rigid outer cup. This means that the clamping element 5 is axially clamped by the locking slot, preventing axial movement.

[0050] In one embodiment, the clearance fit zone is continuously connected to the locking fit zone through a transition, that is, the clamping element 5 and the corresponding locking slot first undergo an anti-drop fit and then a locking fit. In another embodiment, part of the clearance fit zone overlaps with part of the locking fit zone, that is, the clamping element 5 and the corresponding locking slot simultaneously enter a locking fit state while forming an anti-drop fit.

[0051] The coupling of the clamping element 5 and the locking slot can adopt a spiral wedge structure, that is, the locking slot is a spiral wedge slot, and the clamping element 5 is a spiral wedge element. The spiral wedge slot forms a screw-in opening or the starting point of locking at the end of the clearance fitting area, and the spiral wedge slot forms a locking end at the end of the locking fitting area. The height of the slot is gradually reduced from the screw-in opening to the locking end through the thread bevel. The spiral wedge element is specifically a threaded segment, and the front end 5a of the threaded segment is a thinner end, that is, the screw-in end facing the spiral wedge slot; the tail end 5b of the threaded segment is a thicker end, that is, the screw-out end facing away from the spiral wedge slot, and the thicker end is gradually transitioned to the thinner end through the thread bevel. The spiral wedge element and the spiral wedge slot have the same spiral direction, and a plurality of clamping elements 5 form a one-to-one corresponding thread fit with a plurality of locking slots.

[0052] The cooperation between the snap-in element 5 and the locking slot can also adopt a horizontal plug-in cooperation method, that is, the locking slot is a horizontal arc slot, and the snap-in element 5 is a horizontal arc plug-in. The horizontal arc plug-in is gradually screwed into the horizontal arc slot, and the locking assembly is achieved by utilizing the gradually increasing degree of cooperation between the two.

[0053] 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-falling 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 force of the first mechanical feature and the second mechanical feature is matched in the clearance fit area.

[0054] The locking fit zone refers to the stroke from the beginning of interference friction between the corresponding surface of the clamping element 5 and the corresponding surface of the locking slot until locking, and the clearance fit zone refers to the stroke from the first mechanical feature to the second mechanical feature where the damping force is generated.

[0055] The first mechanical feature can adopt various structural features, and the second mechanical feature can be configured to correspond to the first mechanical feature. Regardless of the structural form, as long as the first and second mechanical features cooperate to prevent the cup lid 2 from falling off the rigid outer cup 1, the first and second mechanical features can be combined in various ways, not limited to the specific methods listed in the embodiment. Furthermore, the positions of the first and second mechanical features can be interchanged, as long as they can achieve adaptive cooperation.

[0056] Preferably, the fluid supply cup also includes a liner 3 with a flange, the cup cover 2 is adapted to the liner 3, and a ring surface 1a for placing the flange of the liner 3 is provided at the corresponding position of the inner wall of the rigid outer cup 1, and a plurality of arc-shaped ridges 4 are provided on the inner circumferential wall of the rigid outer cup 1, and the arc-shaped ridges 4 are formed toward the surface of the ring surface 1a to form an upper spiral surface, and a locking groove is formed between the upper spiral surface, the inner wall of the rigid outer cup 1 and the ring surface 1a; a snap-fit ​​element 5 protrudes from the outer edge of the cup cover 2, and 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.

[0057] The top surface of the annular surface 1a is a horizontal plane. This plane cooperates with the upper spiral surface of the arc-shaped ridge 4 to form a locking slot with a wider gap at one end and a narrower gap at the other. The wider end of the locking slot forms a screw-in opening, while the narrower end of the locking slot is provided with a blocking portion to form a locking end. The blocking portion prevents the clamping element 5 from falling out of the locking slot due to excessive screwing. The transition from the wider end to the narrower end gradually changes from a clearance fit zone to a locking fit zone. This change in area is determined by the clearance between the locking slot and the clamping element 5. The length of the locking slot is greater than the length of the clamping element 5, so that the clamping element 5 can perform the necessary screwing movement along the locking slot.

[0058] Preferably, a liquid supply nozzle 2 a protrudes from the center of the cup cover 2 , and a thread line 2 b protrudes from the outer wall of the liquid supply nozzle 2 a , and the thread line 2 b is consistent with the spiral direction of the clamping element 5 .

[0059] A method for using a fluid supply cup, wherein when the clamping element 5 of the cup cover 2 enters the clearance fit area, the anti-fall-off structure generates a damping force.

[0060] The damping force of the anti-fall structure is generated during the assembly or disassembly process, as follows:

[0061] The method includes the following steps of assembling the fluid supply cup: when the clamping element 5 enters the clearance fit area, the anti-dropping structure generates a damping force, and the clamping element 5 is further screwed, so that the clamping element 5 gradually enters the locking fit area from the clearance fit area until the clamping element 5 is locked with the locking groove;

[0062] The method comprises the following steps of disassembling the fluid supply cup: when the clamping element 5 enters the clearance fitting area from the locking fitting area, the anti-falling structure generates a damping force to prevent the clamping element 5 from falling off quickly.

[0063] The snap-fit ​​element 5 on the cup cover 2 gradually enters the clearance fit area, and the first mechanical feature of the snap-fit ​​element 5 and the second mechanical feature on the cup mouth or the locking slot generate a damping force.

[0064] The damping force of the first mechanical feature and the second mechanical feature is generated during the assembly or disassembly process, as follows:

[0065] The method includes the following steps of assembling the fluid supply cup: as the cup cover 2 rotates, the clamping element 5 on the cup cover 2 gradually enters the clearance fit area, and a first mechanical feature of the clamping element 5 and a second mechanical feature on the cup rim or the locking slot generate a damping force; the clamping element 5 is further rotated, and the clamping element 5 gradually enters the locking fit area from the clearance fit area until the clamping element 5 is locked with the locking slot;

[0066] It is important to note that when the cup cover 2 and the rigid outer cup 1 are assembled, they are first limited and then locked. The limited and locked fits can be completed successively in two different areas, or they can be completed simultaneously in the overlapping part of the two areas.

[0067] The method includes the following steps for disassembling the fluid supply cup: when the snap-fit ​​element 5 enters the clearance fit area from the locking fit area, the first mechanical feature of the snap-fit ​​element 5 and the second mechanical feature on the cup mouth or the locking slot generate a damping force to prevent the snap-fit ​​element 5 from falling off quickly.

[0068] It is important to note that when the cup cover 2 and the rigid outer cup 1 are separated, they first disengage from the locking fit and then from the limiting fit. The unlocking and limiting can be completed successively in two different stages, and the unlocking and limiting can also be completed simultaneously in the overlapping part of the two areas.

[0069] As shown in Figures 1 to 4, one embodiment of the anti-drop structure includes a ridge 6 protruding from the inner wall of the rigid outer cup 1. This ridge 6 is the second mechanical feature and is located on the inner wall of the rigid outer cup 1 in the clearance fit region. Of course, the ridge 6 can be located on the inner wall of the rigid outer cup 1 below the arcuate ridge 4 of the locking slot, or on the inner wall of the rigid outer cup 1 outside the coverage of the arcuate ridge 4 of the locking slot. The ridge 6 protrudes toward the center of the cup rim of the rigid outer cup 1. The first mechanical feature is provided on the outer edge of the engaging element 5. The first mechanical feature includes, from the screw-in end, a first step 7 and a second step 9. The outer edge of the first step 7 is wider than the outer edge of the second step 9. The first step 7 is used to form a limited engagement with the arcuate ridge 4 in the axial direction. By increasing the length of the first step 7, the engagement area with the arcuate ridge 4 is increased, thereby preventing the cup lid 2 and the rigid outer cup 1 from being squeezed and separated due to plastic deformation of the material. The step difference between the primary step 7 and the secondary step 9 forms a stepped portion 8, which is specifically a vertical surface between the primary step 7 and the secondary step 9. This vertical surface realizes the stop and limit function. When the clamping element 5 is screwed into the locking slot, the primary step 7 and the ridge 6 generate a damping force. As the screwing continues, the primary step 7 disengages the ridge 6, and the outer edge of the secondary step 9 forms a clearance fit with the ridge. The upper surface of the secondary step 9 (i.e., the lower helical surface) forms an interference fit with the upper helical surface.

[0070] The outer surface of the ridge 6 is an arc-shaped surface, and the step portion 8 has an arc-shaped chamfer. Both of them can ensure the limit stop function while being able to be engaged or disengaged through the arc transition when being twisted by external force.

[0071] During the assembly process of the cup lid 2 and the rigid outer cup 1, the screwed-in end of the clamping element 5 first enters the locking slot, and the primary step 7 contacts and squeezes the rib 6 to generate a damping force, that is, the clamping element 5 begins to enter the clearance fit zone, until the primary step 7 and the rib 6 no longer generate a damping force, at which point the clamping element 5 leaves the clearance fit zone; under the action of torsion, the primary step 7 overcomes friction and passes through the rib 6, and then the rib 6 passes through the step portion 8 and there is a gap between the rib 6 and the outer edge of the secondary step 9. There is no squeezing effect between the rib 6 and the secondary step 9. At this time, the rib 6 can contact the step portion 8 or not, and the step portion 8 between the primary step 7 and the secondary step 9 forms a stop for the rib 6. At this time, the upper surfaces of the primary step 7 and the secondary step 9 (i.e., the lower spiral surface) contact the upper spiral surface of the arc-shaped ridge 4 and begin to enter the locking fit zone, and after a period of travel, the interference friction reaches locking.

[0072] The relatively weak separation torque cannot cause the step portion 8 to break through the ridge 6. Therefore, when the entire supply cup is separated from the spray gun, the step portion 8 and the ridge 6 are used to limit the separation torque required for the cup cover 2 and the rigid outer cup 1 to be greater than the separation torque required for the cup cover 2 and the spray gun. In this way, when they are subjected to the separation torque at the same time, it is ensured that the cup cover 2 and the spray gun are first and smoothly unscrewed to complete the separation.

[0073] During the process of separating the cup cover 2 and the rigid outer cup 1, the tail end 5b of the snap-fit ​​element 5 is first rotated toward the outside of the screw-in opening of the locking slot, and at this time the snap-fit ​​element 5 gradually disengages from the locking fit area; a torque greater than the stopping resistance of the step portion 8 and the ridge 6 is applied, so that the step portion 8 breaks through the ridge 6, and then the first-level step 7 contacts and squeezes the ridge 6 to rotate outward while generating a damping force, and the snap-fit ​​element 5 begins to gradually disengage from the clearance fit area until the snap-fit ​​element 5 is completely screwed out of the locking slot to separate the cup cover 2 from the rigid outer cup 1.

[0074] As shown in Figures 5 to 7, one embodiment is that the anti-falling structure includes at least one protrusion 10 protruding from the inner wall of the rigid outer cup 1, and the protrusion 10 is the second mechanical feature. The protrusion 10 is located on the inner wall of the rigid outer cup 1 of the screw-out extension line of the locking slot. The protrusion 10 protrudes toward the center of the cup mouth of the rigid outer cup 1. At least one groove 11 is provided on the outer edge of the snap-fit ​​element 5. The groove 11 is the first mechanical feature. The protrusion 10 can be embedded in the groove 11. The snap-fit ​​element 5 is screwed into the locking slot, and the protrusion 10 and the tail end 5b of the snap-fit ​​element 5 form a stop limit.

[0075] There is one protrusion 10, located outside the locking slot; there are two recesses 11, separated by a spacing. The side of the protrusion 10 facing the recess 11 has a semicircular convex surface, while the recess 11 has a corresponding semicircular concave surface facing the protrusion 10. These two surfaces ensure a secure engagement and allow for a circular transition when twisted by external force to engage or disengage.

[0076] During the assembly process of the cup cover 2 and the rigid outer cup 1, the screw-in end of the snap-in element 5 first enters the locking groove, and the groove 11 located in the front first forms a snap fit with the protrusion 10 on the outside of the locking groove (that is, the snap-in element 5 begins to enter the clearance fit area until all the grooves 11 and the protrusion 10 no longer generate damping force, and then the snap-in element 5 leaves the clearance fit area; of course, the snap-in element 5 can also be located in the clearance fit area, and the cup cover 2 and the rigid outer cup 1 are locked). As the rotation moves, the two grooves 11 overcome the limiting snap fit of the outer protrusion 10 in turn, and then the snap-in element 5 enters the locking fit area of ​​the locking groove to form a lock (that is, the lower spiral surface of the snap-in element 5 and the upper spiral surface of the locking groove begin to generate interference friction until the locking stroke). At this time, the protrusion 10 stops and limits the tail end 5b of the snap-in element 5, and the anti-slip limiting effect formed on the outside of the locking groove is formed by the protrusion 10.

[0077] During the process of separating the cup cover 2 and the rigid outer cup 1, the tail end 5b of the snap-fit ​​element 5 is first rotated toward the outside of the screw-in opening of the locking slot. At this time, the snap-fit ​​element 5 gradually disengages from the locking fit area; then the two grooves 11 are gradually engaged and disengaged from the protrusions 10 outside the locking slot in turn, that is, the snap-fit ​​element 5 is disengaged from the clearance fit area, until the snap-fit ​​element 5 is completely screwed out of the locking slot to realize the separation of the cup cover 2 and the rigid outer cup 1.

[0078] One embodiment is that the anti-fall-off structure includes at least one rib protruding from the lower spiral surface of the snap-in element 5, and the rib is the first mechanical feature. At least one slot is correspondingly provided on the arc-shaped ridge 4, and the slot is the second mechanical feature. The snap-in element 5 is screwed into the locking groove, and the rib is correspondingly embedded in the slot.

[0079] The ribs and the slots can be matched in the following two ways:

[0080] One is, as shown in Figures 8 to 10, a total of three ribs 12 and corresponding three slots 13 are arranged, the rib 12 has an arc-shaped top surface, the slot 13 is recessed in the upper spiral surface of the arc-shaped convex strip 4, and the slot 13 has an arc groove wall. While both ensure the clamping and limiting effect, when twisted by external force, they can be clamped in or out through the arc transition.

[0081] During the assembly process of the cup lid 2 and the rigid outer cup 1, the screwed-in end of the snap-in element 5 first enters the locking slot. The specific process of snap-in element 5 entering the clearance fit zone is as follows: the arcuate top surfaces of the three ribs 12 gradually contact and compress the upper spiral surface. During the turning movement, the first rib 12 first enters the last groove 13. At this point, the first rib 12 and groove 13 have achieved the anti-slip limit function, and the snap-in element 5 and the locking slot are now in a clearance fit. The snap-in element 5 then begins to enter the locking fit zone while remaining in the clearance fit zone until the three ribs 12 are correspondingly engaged in the three grooves 13. This not only achieves multiple anti-slip limit functions, but also causes the lower spiral surface of the snap-in element 5 to begin to generate interference friction with the upper spiral surface of the locking slot until it is locked.

[0082] During the process of separating the cup cover 2 and the rigid outer cup 1, the tail end 5b of the snap-fit ​​element 5 is first rotated toward the outside of the screw-in opening of the locking slot. At this time, the snap-fit ​​element 5 gradually disengages from the locking fit area; the three ribs 12 are gradually squeezed one by one to disengage the upper spiral surface from the three slots 13, that is, the snap-fit ​​element 5 is disengaged from the clearance fit area, until the snap-fit ​​element 5 is completely screwed out of the locking slot to realize the separation of the cup cover 2 and the rigid outer cup 1.

[0083] The other is, as shown in Figures 11 to 13, two ribs 14 are arranged side by side on the snap-fit ​​element 5, and a number of slots 15 are continuously arranged on the edge of the arc-shaped ridge 4 toward the center of the cup mouth. The side of the rib 14 facing the slot 15 has an arc convex wall surface, and the slot 15 facing the rib 14 has an arc concave wall surface. While ensuring the snap-fit ​​limiting effect, the two can be snapped in or out through the arc transition when twisted by external force.

[0084] During the assembly of the cup lid 2 and the rigid outer cup 1, the specific process for the clamping element 5 to enter the clearance fit zone is as follows: the screwed-in end of the clamping element 5 first enters the locking slot, and then, through plastic deformation, the arcuate convex wall surfaces of the two ribs 14 sequentially enter the second slot 15, thus achieving the anti-slip limiting function of the ribs 14 and the second slot 15. The clamping element 5 then begins to enter the locking fit zone while remaining within the clearance fit zone. During the turning movement, the lower spiral surface of the clamping element 5 and the upper spiral surface of the locking slot begin to generate interference friction until locking occurs.

[0085] During the process of separating the cup cover 2 and the rigid outer cup 1, the tail end 5b of the snap-fit ​​element 5 is first rotated toward the outside of the screw-in opening of the locking slot, and at this time the snap-fit ​​element 5 gradually disengages from the locking fit area; simultaneously, the arc convex wall surfaces of the two ribs 14 are moved outward along a number of slots 2 15 in turn, and the two ribs 2 14 are first separated from the slots 2 15, that is, the process of the snap-fit ​​element 5 disengaging from the clearance fit area, and then the snap-fit ​​element 5 is completely screwed out of the locking slot to realize the separation of the cup cover 2 and the rigid outer cup 1.

[0086] As shown in Figures 14 to 18, one embodiment is that the anti-falling structure includes an elastic piece 16 protruding from the outer edge of the cup cover 2, and the elastic piece 16 is arranged on the extension line of the tail end 5b of the clamping element 5. The annular surface 1a is provided with a through groove 1b corresponding to the arc-shaped convex strip 4, and the through groove 1b is the second mechanical feature. The elastic piece 16 is provided with a protrusion 16a on the lower surface facing the through groove 1b, and the elastic piece 16 and the protrusion 16a are the first mechanical features. The clamping element 5 is screwed into the locking groove, and the annular surface 1a squeezes the protrusion 16a to drive the elastic piece 16 to undergo elastic deformation. The protrusion 16a moves into the through groove 1b to drive the elastic piece 16 to reset, and the protrusion 16a and the groove edge of the through groove 1b form a stop limit.

[0087] The rear end 5b of the engaging element 5 is distal from its screw-in end, and an elastic piece 16 protrudes from the outer edge of the cup lid 2. A separating notch is provided between the elastic piece 16 and the rear end 5b of the engaging 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, facilitating sliding friction between the two after contact. When twisted by an external force, the spherical surface can transition away from the edge of the through groove 1b.

[0088] During the assembly process of the cup lid 2 and the rigid outer cup 1, the bottom surface of the clamping element 5 is aligned with the annular surface 1a and screwed into the locking groove. The specific process of the clamping element 5 entering the clearance fit zone is as follows: the protrusion 16a on the bottom surface of the elastic sheet 16 is pressed against the annular surface 1a and slides. Because the bottom surface of the elastic sheet 16 is flush with the bottom surface of the clamping element 5, the height of the protrusion 16a presses and lifts the elastic sheet 16 to produce elastic deformation. After turning and 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, and the protrusion 16a falls into the through groove 1b and forms a height limit with the groove edge of the through groove 1b to achieve the anti-slip effect. When the clamping element 5 is in the rear section of the clearance fit zone or leaves the clearance fit zone, the clamping element 5 enters the locking fit zone, and its lower spiral surface begins to produce interference friction with the upper spiral surface of the locking groove until it is locked.

[0089] During the process of separating the cup cover 2 and the rigid outer cup 1, the tail end 5b of the snap-fit ​​element 5 is first rotated and moved toward the outside of the screw-in opening of the locking slot. At this time, the snap-fit ​​element 5 gradually disengages from the locking fit area; the spherical surface of the protrusion 16a contacts the groove edge of the through groove 1b, and under the continuous twisting action of the external force, the protrusion 16a is forced to lift the elastic sheet 16 through the groove edge, and then the snap-fit ​​element 5 is completely screwed out of the locking slot to realize the separation of the cup cover 2 and the rigid outer cup 1, that is, the process of the snap-fit ​​element 5 disengaging from the clearance fit area.

[0090] As shown in Figures 19 to 21, one embodiment is that the anti-falling structure includes an elastic member 17 protruding from the outer edge of the cup cover 2, and the elastic member 17 is arranged on the extension line of the tail end 5b of the clamping element 5. A plurality of convex lines 18 protrude from the annular surface 1a, and the convex lines 18 are the second mechanical features. The plurality of convex lines 18 are arranged on the screw-out extension line of the locking slot, and the elastic member 17 protrudes a wavy edge 17a toward the lower edge of the convex line 18. The elastic member 17 and the wavy edge 17a are the first mechanical features. The clamping element 5 is screwed into the locking slot, and the wavy edge 17a engages with the convex line 18.

[0091] The tail end 5b of the engaging element 5 is spaced away from its screw-in end. The elastic member 17 protrudes from the outer edge of the cup lid 2. A separating notch is provided between the elastic member 17 and the tail end 5b of the engaging element 5 to facilitate independent elastic deformation of the elastic member 17. Several convex lines 18 are arranged in parallel. The spacing between adjacent crests of the wavy edges 17a matches the spacing between adjacent convex lines 18. When the elastic member 17 is in the free state, the crests of the wavy edges 17a extend beyond the lower surface of the engaging element 5. The convex lines 18 have an arc-shaped top surface to match the wavy edges 17a. When twisted by an external force, the two can engage or disengage through a circular transition.

[0092] During the assembly process of the cup lid 2 and the rigid outer cup 1, the specific process of the clamping element 5 entering the clearance fit zone is as follows: the bottom surface of the clamping element 5 is in contact with the annular surface 1a and screwed into the locking groove. When the crest of the wave edge 17a encounters the convex line 18, the height of the convex line 18 presses and lifts the elastic member 17 to produce elastic deformation. When the crest of the wave edge 17a enters the gap between adjacent convex lines 18, the elastic member 17 sinks and recovers the elastic deformation, causing the wave edge 17a to bite into the convex line 18 to achieve the anti-slip effect. When the clamping element 5 is located in the rear section of the clearance fit zone or leaves the clearance fit zone, the clamping element 5 enters the locking fit zone, causing its lower spiral surface to begin to produce interference friction with the upper spiral surface of the locking groove until it is locked.

[0093] During the process of separating the cup cover 2 and the rigid outer cup 1, the tail end 5b of the snap-fit ​​element 5 is first rotated and moved toward the outside of the screw-in opening of the locking slot. At this time, the snap-fit ​​element 5 gradually disengages from the locking fit area; under the continuous twisting action of the external force, the wave is forced to lift the elastic part 17 along 17a and pass through the convex line 18 one by one, and then the snap-fit ​​element 5 is completely screwed out of the locking slot to realize the separation of the cup cover 2 and the rigid outer cup 1, that is, the process of the snap-fit ​​element 5 disengaging from the clearance fit area.

[0094] As shown in Figures 22 and 23 , one embodiment of the anti-drop structure includes a plurality of protruding tabs 19 protruding from the inner wall of the rigid outer cup 1 . These protruding tabs 19 serve as the second mechanical feature. These protruding tabs 19 project toward the center of the rim of the rigid outer cup 1 . These protruding tabs 19 are arranged along the extension line of the locking slot. These protruding tabs 19 are flush with the arcuate ridges 4 . When the engaging element 5 is rotated out of the locking slot, the lower spiral surface of the engaging element 5 moves along the protruding tabs 19 , generating a damping force. This damping force can be the friction generated by the contact between the engaging element 5 and the protruding tabs 19 . At this point, the lower spiral surface of the engaging element 5 serves as the first mechanical feature. The protruding tabs 19 are semicircular, with three protruding tabs 19 provided for each locking slot, and the three protruding tabs 19 are evenly spaced.

[0095] During the assembly process of the cup lid 2 and the rigid outer cup 1, the specific process for the snap-fit ​​element 5 to enter the clearance fit zone is as follows: the snap-fit ​​element 5 is first screwed in between the three tabs 19 and the annular surface 1a. After being guided by the three tabs 19, the snap-fit ​​element 5 enters the locking fit zone, where its lower spiral surface begins to generate interference friction with the upper spiral surface of the locking slot until it locks. During the separation process of the cup lid 2 and the rigid outer cup 1, the tail end 5b of the snap-fit ​​element 5 is first rotated toward the outside of the screw-in opening of the locking slot, at which point the snap-fit ​​element 5 gradually disengages from the locking fit zone. After the snap-fit ​​element 5 is screwed out of the locking slot, the three tabs 19 further act as axial stops to increase the disengagement distance. The cup lid 2 is then screwed in until the snap-fit ​​element 5 is completely released from the three tabs 19, separating the cup lid 2 from the rigid outer cup 1. This is the process of the snap-fit ​​element 5 disengaging from the clearance fit zone.

Claims

1. A fluid supply cup, comprising a matching rigid outer cup and a cup cover, wherein the rim of the rigid outer cup is provided with a plurality of locking slots, and the outer edge of the cup cover is provided with a plurality of corresponding snap-fit ​​elements, the snap-fit ​​elements being capable of being inserted into the corresponding locking slots to couple the rigid outer cup and the cup cover, characterized in that: An anti-falling structure is provided between the snap-fit ​​element and the corresponding locking slot. The snap-fit ​​element is screwed into the locking slot. The snap-fit ​​element gradually transitions from the clearance fit area to the locking fit area. The damping force of the anti-falling structure is fitted in the clearance fit area.

2. The fluid supply cup according to claim 1, wherein: The clamping element is provided with a first mechanical feature, and the cup mouth or the locking slot 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-falling structure; The clamping element is screwed into the locking slot, and the clamping element gradually transitions from a clearance fit area to a locking fit area, and the damping forces of the first mechanical feature and the second mechanical feature are matched in the clearance fit area.

3. The fluid supply cup of claim 2, wherein: The anti-falling structure includes a ridge protruding from the inner wall of the rigid outer cup, and the ridge is located on the inner wall of the rigid outer cup in the clearance fitting area. The ridge protrudes toward the center of the cup mouth of the rigid outer cup. The outer edge of the clamping element is provided with a first step and a second step in sequence starting from the screw-in end. The step difference between the first step and the second step forms a step portion. The clamping element is screwed into the locking slot, and the first step and the ridge form a damping force.

4. The fluid supply cup of claim 2, wherein: The anti-falling structure includes at least one protruding block protruding from the inner wall of the rigid outer cup, the protrusion is located on the inner wall of the rigid outer cup of the screw-out extension line of the locking slot, the protrusion protrudes toward the center of the cup mouth of the rigid outer cup, at least one groove is provided on the outer edge of the clamping element, the protrusion can be embedded in the groove, the clamping element is screwed into the locking slot, and the protrusion and the tail end of the clamping element form a stop limit.

5. The fluid supply cup of claim 2, wherein: The anti-falling structure includes at least one rib protruding from the lower spiral surface of the clamping element, and at least one clamping slot is correspondingly provided on the arc-shaped convex strip of the locking slot. The clamping element is screwed into the locking slot, and the rib is correspondingly embedded in the clamping slot.

6. The fluid supply cup of claim 2, wherein: The anti-falling structure includes an elastic sheet protruding from the outer edge of the cup cover, and the elastic sheet is arranged on the extension line of the tail end of the clamping element. The annular surface of the rigid outer cup is provided with a through groove corresponding to the arc-shaped convex strip of the locking groove, and the elastic sheet is provided with a protrusion on the lower surface facing the through groove. The clamping element is screwed into the locking groove, and the annular surface squeezes the protrusion to drive the elastic sheet to undergo elastic deformation. The protrusion moves into the through groove to drive the elastic sheet to reset, and the protrusion and the groove edge of the through groove form a stop limit.

7. The fluid supply cup of claim 2, wherein: The anti-falling structure includes an elastic part protruding from the outer edge of the cup cover, and the elastic part is arranged on the extension line of the tail end of the clamping element. Several convex lines protrude from the annular surface of the rigid outer cup, and several of the convex lines are arranged on the screw-out extension line of the locking slot. The elastic part protrudes a wavy edge toward the lower edge of the convex line, and the clamping element is screwed into the locking slot, and the wavy edge bites the convex line.

8. The fluid supply cup of claim 2, wherein: The anti-falling structure includes a plurality of protruding pieces protruding from the inner wall of the rigid outer cup, and the protruding pieces protrude toward the center of the cup mouth of the rigid outer cup. The plurality of protruding pieces are arranged on the extension line of the locking slot, and the protruding pieces are flush with the arc-shaped protruding strips of the locking slot. When the clamping element is screwed out of the locking slot, the lower spiral surface of the clamping element moves along the plurality of protruding pieces to form a damping force.

9. A method for using a fluid supply cup, characterized in that: When the snap-fit ​​element of the cup cover enters the clearance fit area, the anti-fall-off structure generates a damping force.

10. The method of use according to claim 9, characterized in that The clamping element on the cup cover gradually enters the clearance fit area, and the first mechanical feature of the clamping element and the second mechanical feature on the cup mouth or the locking slot generate a damping force.

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