Liquid scraping cup and fluid supplier

Abstract

The utility model provides a liquid scraping cup and a fluid supply device, belongs to the technical field of spraying equipment, and solves the problems of leakage, pollution, waste and the like of feed liquid during liquid scraping. The cup comprises a cup body with a cup opening, a cup edge gradually away from the center line of the cup body is arranged on the periphery of the cup opening, the cup edge is provided with an inner edge close to the center line of the cup body and an outer edge away from the center line of the cup body, and the plane where the outer edge is located is not higher than the plane where the inner edge is located. And the stirring rod is only in contact with the inner edge in the liquid scraping process when the stirring rod is pulled outwards from the interior of the cup body. The design principle that the outer edge is not higher than the inner edge is adopted, the acute angle inclined liquid scraping habit of a user is met, the stirring rod only makes contact with the inner edge instead of the outer edge in the liquid scraping process, and therefore it is guaranteed that all scraped liquid flows back, and liquid residues and waste are reduced; meanwhile, the liquid can be effectively guided back into the cup body and cannot flow out of the cup body due to contact with the outer edge, and pollution caused by leakage is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to spraying equipment technical field relates to a spray cup especially a kind of liquid scraping cup and fluid supply. BACKGROUND

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

[0003] Paint is injected into the spray cup, and due to uneven paint or air bubbles and other reasons, the paint needs to be stirred by stirring rod before spraying to improve the uniformity of the paint and reduce air bubbles.

[0004] For example, the Chinese patent document with application number 202122492058.0 and publication number CN 216094348 U discloses a liquid supply device for spraying equipment, which has a cover with a fluid outlet, an inner liner with a flange, and a rigid outer cup with an open end, wherein the cover extends over the open end and the inner liner is received in the rigid outer cup; a plurality of spiral wedge elements are uniformly arranged on the outer edge of the cover; a plurality of spiral wedge slots are uniformly arranged on the upper edge of the inner wall of the rigid outer cup; the spiral wedge elements are screwed into the spiral wedge slots, and the cover is connected with the rigid outer cup. The structure of rigid outer cup, inner liner and cover is used instead of the four-component mode in traditional technology, which reduces one component, reduces the manufacturing cost of the liquid supply device, reduces the installation process of parts, facilitates the operation of workers, and because the spiral wedge elements are uniformly arranged on the edge of the cover in the utility model, the length is short, the travel of the cover is reduced, and the over-deformation of the inner liner is avoided.

[0005] The technical scheme in combination with the drawings shows that the upper edge of the inner wall of the rigid outer cup has an annular step structure, the upper edge inner wall is provided with a one-way protrusion for locking with the cover, in order to realize the injection molding demolding process of the one-way protrusion, a through opening is arranged on the annular step surface for demolding; and because the outer edge of the annular step structure is obviously higher than the inner edge, after the paint is stirred by the stirring rod, the user usually extracts the stirring rod from the inner liner at a certain inclination angle, and simultaneously performs a liquid scraping action to make the excess paint carried by the stirring rod flow back to the inner liner. Because the user usually performs the liquid scraping at an acute inclination angle, in the liquid scraping process, the stirring rod contacts the mouth edge of the inner liner and the outer edge of the annular step structure of the rigid outer cup, so that part of the paint flows along the outer edge to the plane of the annular step, and then flows to the outer wall of the rigid outer cup through the through opening, causing the paint to leak and pollute, the leaked paint also drops on the processing site or the product, affecting the qualified rate of product spraying; in addition, the price of the sprayed paint is relatively high, the leaked paint leads to waste, and increases the spraying processing cost. Practical new type content

[0006] The utility model aims at the above -mentioned problem existing in prior art, proposes a liquid scraping cup and fluid supply.

[0007] The utility model discloses a liquid scraping cup, including the cup body with cup mouth, the cup mouth periphery is provided with the cup edge away from cup body center line gradually, the cup edge has the inner edge close to cup body center line and the outer edge away from cup body center line, the plane height where the outer edge is at is no higher than the plane height where the inner edge is at, make the stirring rod only contact the inner edge during the liquid scraping process that the stirring rod is extracted from cup body interior to outward.

[0008] In the above-mentioned liquid scraping cup, the cup body includes a rigid outer cup and an inner cup, the inner cup has a mouth edge one, the rigid outer cup has a mouth edge two, the inner cup is received in the rigid outer cup, the mouth edge one is overlapped on the mouth edge two to form the inner edge with the superimposed height.

[0009] In the above-mentioned liquid scraping cup, a plurality of locking structures are arranged on the outer periphery of the mouth edge two, at least one pair of adjacent locking structures are arranged with a spacing gap, the outer periphery of the mouth edge two is exposed in the region of the spacing gap to form the outer edge, and the inner periphery region of the mouth edge one corresponding to the outer edge forms the inner edge.

[0010] In the above-mentioned liquid scraping cup, the locking structure includes a tab on the outer edge of the mouth edge two, which is parallel to the axis of the rigid outer cup and away from the cup bottom of the rigid outer cup, a one-way protrusion is arranged on the inner side of the tab, which faces the center direction of the cup mouth of the rigid outer cup, the surface of the one-way protrusion towards the cup bottom of the rigid outer cup is a spiral surface, and the spiral surface and the mouth edge two form a spiral wedge-shaped groove.

[0011] In the scraping cup, the two ends of the tab are fixed to the rim by an inclined part, and the inclined part and the tab are connected by a circular arc chamfer; an annular edge is arranged on the outer edge of the rim and parallel to the axis of the rigid outer cup and towards the bottom of the rigid outer cup, and a plurality of support ribs are arranged between the inner side of the annular edge and the bottom surface of the rim towards the bottom of the rigid outer cup and the outer cup wall of the rigid outer cup.

[0012] In the scraping cup, a strip-shaped opening is arranged at the corresponding position of the one-way protrusion.

[0013] In the scraping cup, the spiral wedge-shaped groove has an inlet and outlet opening end, and a gear block is arranged at the inlet and outlet opening end, and the gear block is specifically a semicircular block or a hemispherical block.

[0014] A fluid supply device comprising the scraping cup and a cover matched with the rigid outer cup and the inner cup.

[0015] In the fluid supply device, a fluid outlet suitable for coupling the cover to a spraying device is arranged on the cover, and a sealing part matched with the opening of the inner cup is arranged at the corresponding position of the cover.

[0016] In the fluid supply device, a plurality of spiral wedge-shaped elements are arranged on the outer edge of the cover, and the spiral wedge-shaped elements are matched with and correspond to the spiral wedge-shaped grooves; the spiral wedge-shaped elements are screwed into the spiral wedge-shaped grooves to couple the cover with the rigid outer cup.

[0017] Compared with the prior art, the scraping cup and the fluid supply device have the following beneficial effects:

[0018] 1. Improving the scraping recovery rate: the scraping cup adopts the design principle that the outer edge is not higher than the inner edge, which meets the user's habit of acute angle inclination scraping, so that the stirring rod only contacts the inner edge during the scraping process and does not contact the outer edge, thereby ensuring that all the scraped liquid flows back. The liquid is effectively scraped along the inner edge of the cup and flows back into the cup, reducing the residue and waste of the liquid.

[0019] 2. Preventing liquid leakage: the design of the cup mouth with the inner part higher than the outer part ensures that the liquid does not leak during stirring and scraping. In particular, when the stirring rod contacts the inner edge for scraping, the liquid is effectively guided back into the cup body and will not flow to the outside of the cup body due to contact with the outer edge. In particular, the interval gap design realizes the low scraping area of the outer edge, effectively avoiding the possibility of liquid loss from the outer edge area and preventing pollution caused by leakage.

[0020] 3. Enhanced structural stability: The combination of the rigid outer cup and the inner cup utilizes the overlapping structure of the first rim and the second rim, not only forming an effective liquid scraping inner rim, but also increasing the overall stability of the cup. The design of the rigid outer cup provides strength and durability, while the soft inner cup helps to improve the sealing of the cup mouth and the smooth supply of the material liquid through collapse.

[0021] 4. Optimized locking structure: This locking structure includes ingenious designs such as spiral wedge elements and spiral wedge grooves, which can achieve reliable locking effect, while using the reinforcing structure to avoid structural extrusion deformation. While achieving the function of scraping liquid from high to low, it also does not affect the strength requirements of the locking function.

[0022] 5. Reduce the risk of liquid leakage: The cooperation design of the spiral wedge groove and the gear block further ensures the stable locking of the spiral wedge element, thereby reducing the problem of liquid leakage that may be caused by loose structure. At the same time, the sliding friction design of the spiral wedge element and the gear block makes the locking and opening operation more smooth, improving the convenience of use.

[0023] Overall, the liquid scraping cup of the present application improves the backflow rate and stability of the liquid scraping through the ingenious relative height design, reduces the risk of liquid leakage and pollution, and at the same time ensures the locking strength and use convenience of the product. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a perspective view of the liquid scraping cup with one interval gap.

[0025] Figure 2 is a sectional perspective view of the liquid scraping cup with one interval gap.

[0026] Figure 3 is a perspective view of the liquid scraping cup with two interval gaps.

[0027] Figure 4 is a top view of the liquid scraping cup with two interval gaps.

[0028] Figure 5 is a perspective view of the liquid scraping cup with four interval gaps.

[0029] Figure 6 is a sectional perspective view of the liquid scraping cup with four interval gaps.

[0030] Figure 7 is a perspective view of the bottom of the rigid outer cup of the liquid scraping cup.

[0031] Figure 8 is a perspective view of the bottom of the rigid outer cup of the liquid scraping cup. Figure 7 is a perspective view of the bottom of the rigid outer cup of the liquid scraping cup.

[0032] Figure 9 This is a three-dimensional structural diagram of the overall assembly of the fluid supplier with four spacing gaps.

[0033] Figure 10 This is a sectional three-dimensional structural diagram of the assembly of the fluid supplier with two spaced gaps.

[0034] In the figure, 1, inner cup; 2, rim 1; 3, inner rim; 4, rigid outer cup; 5, rim 2; 6, spacing notch; 7, outer rim; 8, arc wall; 9, protrusion; 10, inclined portion; 11, one-way protrusion; 12, spiral wedge groove; 13, annular edge; 14, supporting rib; 15, shifting protrusion; 16, cover; 17, fluid outlet; 18, closing portion; 19, spiral wedge element. DETAILED DESCRIPTION

[0035] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0036] like Figures 1 to 8 As shown, the scraping cup includes a cup body with a cup mouth, a cup rim is set on the outer periphery of the cup mouth and gradually moves away from the center line of the cup body, the cup rim has an inner edge 3 close to the center line of the cup body and an outer edge 7 away from the center line of the cup body, and the plane height of the outer edge 7 is not higher than the plane height of the inner edge 3, so that the stirring rod only contacts the inner edge 3 when it is pulled out from the inside of the cup body to scrape the liquid.

[0037] When the cup is placed upright with the mouth of the cup facing upward, the level of the inner edge 3 is not lower than the level of the outer edge 7. When the stirring rod only contacts the inner edge 3 to scrape the liquid, the liquid carried by the stirring rod flows back into the cup through the inner edge 3.

[0038] Preferably, the cup body includes a rigid outer cup 4 and an inner cup 1, the inner cup 1 has a rim 1 2, the rigid outer cup 4 has a rim 2 5, the inner cup 1 is received in the rigid outer cup 4, and the rim 1 2 overlaps the rim 2 5 to form an inner rim 3.

[0039] The inner cup 1 is a soft plastic lining. The opening of the inner cup 1 is folded outward horizontally to form a rim 2. The rigid outer cup 4 is a hard plastic cup. The opening of the rigid outer cup 4 is folded outward horizontally to form a rim 2 5. The diameter of the inner cup 1 is slightly smaller than that of the rigid outer cup 4, allowing it to fit inside. The rim 1 2 overlaps the rim 2 5, and the thickness of the rim 1 2 increases the height of the opening of the inner cup 1 above that of the rigid outer cup 4. This creates a structural feature where the inner rim 3 is higher than the outer rim 7, meaning that the inner circumference of the rim 1 2 is used for scraping liquids.

[0040] like Figures 1 to 6As shown, preferably, the outer periphery of the rim 5 is provided with a plurality of locking structures, at least one pair of adjacent locking structures is arranged with a spacing gap 6, and the remaining adjacent locking structures are connected by an arc wall 8, the center of the arc wall 8 is located on the central axis of the rigid outer cup 4. The rim 5 is exposed to the outer periphery in the area of the spacing gap 6 to form an outer edge 7, and the inner periphery of the rim 1 corresponding to the outer edge 7 forms an inner edge 3.

[0041] Because the locking structure is high, the outer edge 5 is in the plane of the rim 2, when the stirring rod is scraped in the position where the locking structure is located, it is inevitable to contact the locking structure, thereby causing the liquid carried on the stirring rod to be scraped to other positions except the inner edge 3. The exposed rim 5 in the spacing gap 6 is lower than the plane height of the rim 2, when the stirring rod contacts the inner edge 3 of the rim 2 in the area position to scrape the liquid, the stirring rod and the rim 5 must form an angle gap to avoid the contact between the stirring rod and the rim 5 causing the liquid to leak out.

[0042] The number of spacing gaps 6 can be set according to requirements, the number of spacing gaps 6 is small, the scraping area range is small, but the strength of the locking structure is high; the number of spacing gaps 6 is large, the scraping area range is large, but the strength of the locking structure is relatively low; the embodiment specifically adopts one spacing gap 6 as shown in Figure 1 , two spacing gaps 6 as shown in Figure 3 , and four spacing gaps 6 as shown in Figure 5 . The width range of the spacing gap 6 is designed considering the diameter or width of the stirring rod, and the width of the spacing gap 6 is greater than the diameter or width of the stirring rod.

[0043] As shown in Figures 1 to 6 , preferably, the locking structure includes a tab 9 on the outer edge of the rim 5, which is parallel to the axis of the rigid outer cup 4 and away from the bottom of the rigid outer cup 4, a one-way protrusion 11 is arranged on the inner side of the tab 9 facing the center direction of the mouth of the rigid outer cup 4, the surface of the one-way protrusion 11 facing the bottom of the rigid outer cup 4 is a spiral surface, and the spiral surface and the rim 5 form a spiral wedge-shaped groove 12.

[0044] The tab 9 and the rim 5 form a vertical integrated connection, the tab 9 realizes the carrier of the one-way protrusion 11, and part of the inner side of the tab 9 cooperates with the rim 5 and the spiral surface to form the spiral wedge-shaped groove 12, wherein the part of the inner side of the tab 9 forms the outer wall surface of the spiral wedge-shaped groove 12, the spiral surface forms the top surface of the spiral wedge-shaped groove 12, and the rim 5 forms the bottom surface of the spiral wedge-shaped groove 12. The one-way protrusion 11 is substantially an L-shaped strip body arranged transversely, the open end of the L-shaped strip body is the wider end of the spiral wedge-shaped groove 12, and the closed end of the L-shaped strip body is the narrower end of the spiral wedge-shaped groove 12 and forms a stop end.

[0045] Preferably, both ends of the tab 9 are integrally connected with the rim 5 through the inclined part 10, and the inclined part 10 is connected with the tab 9 through a circular arc chamfer. The tab 9 is an arc-shaped piece with a certain height, and the height gradually decreases through the inclined part 10 at both ends of the tab 9 to connect with the plane of the rim 5, which can not only play a role in transition connection to eliminate stress caused by sudden change in height at the connection position, but also play a role in strengthening the tab 9 to prevent the extrusion deformation of the helical wedge-shaped groove 12 when locked.

[0046] As shown in Figure 7 and 8 Preferably, an annular edge 13 is arranged on the outer edge of the rim 5, which is parallel to the axis of the rigid outer cup 4 and faces the bottom of the rigid outer cup 4. The annular edge 13 is located in the same circle as the tabs 9, and the annular edge 13 and the outer surface of the tab 9 form a smooth arc surface. A plurality of support ribs 14 are arranged between the inner side of the annular edge 13, the bottom surface of the rim 5 facing the bottom of the rigid outer cup 4, and the outer cup wall of the rigid outer cup 4. The support ribs 14 play a supporting and strengthening role for the rim 5, the annular edge 13 and the tab 9, further increase the strength of the helical wedge-shaped groove 12, and avoid extrusion deformation when locked.

[0047] As shown in Figure 7 and 8 Preferably, a strip-shaped opening is arranged on the rim 5 corresponding to the one-way protrusion 11. The strip-shaped opening is roughly similar in shape to the one-way protrusion 11, and the demolding operation of the one-way protrusion 11 is realized through the strip-shaped opening. In the traditional cup structure, due to the existence of the strip-shaped opening, during the liquid scraping process, because the outer edge 7 of the cup body is higher than the inner edge 3, the stirring rod contacts the outer edge 7, the liquid flows along the outer edge 7 to the upper surface of the rim 5, and then falls to the outer wall of the cup body through the strip-shaped opening, causing external pollution.

[0048] Preferably, the helical wedge-shaped groove 12 has an inlet and outlet opening end, and a detent bump 15 is arranged at the inlet and outlet opening end. The detent bump 15 is specifically a semicircular bump or a hemispherical bump. After the helical wedge-shaped element 19 is screwed into the helical wedge-shaped groove 12, the detent bump 15 limits the easy removal of the helical wedge-shaped element 19, and plays a role in strengthening the locking. In addition, the semicircular or hemispherical shape provides sliding friction for the helical wedge-shaped element 19 to enter and exit, so as to reduce the friction resistance and facilitate the user to perform the locking or opening operation.

[0049] The use mode of the liquid scraping cup is as follows:

[0050] First, the inner cup 1 is placed into the rigid outer cup 4, and the mouth edge one 2 of the inner cup 1 is overlapped on the mouth edge two 5 of the rigid outer cup 4, the thickness of the mouth edge one 2 increases the height of the opening of the inner cup 1 higher than that of the rigid outer cup 4, a certain amount of paint is injected into the inner cup 1, and the paint is stirred using a stirring rod inserted into the inner cup 1. After stirring is completed, the stirring rod is gradually lifted in the inclined direction (usually the stirring rod and the plane of the cup mouth form an acute angle) in the area of the interval gap 6, and the outer wall of the stirring rod is only in contact with the inner circle of the mouth edge one 2 of the inner cup 1, and the paint on the stirring rod is scraped back into the inner cup 1 by the inner edge 3, effectively preventing paint from overflowing and causing pollution.

[0051] Another solution, as shown in Figure 9 and 10 A fluid supply device, comprising the scraping cup described above, and comprising a cover 16 which is adapted to the rigid outer cup 4 and the inner cup 1. The specific structure of the cover 16 is not limited here, as long as the cover 16 can realize the cooperation and closure with the rigid outer cup 4 and the inner cup 1 to be used in a complete set.

[0052] Preferably, the cover 16 is provided with a fluid outlet 17 suitable for connecting the cover 16 to the fluid outlet of a spraying device, and the top surface of the cover 16 is provided with a tubular fluid outlet 17, and the outer periphery of the fluid outlet 17 is provided with a connecting structure for connecting the spraying device. The cover 16 is provided with a sealing part 18 corresponding to the opening of the inner cup 1. The sealing part 18 is an expansion ring protruding from the bottom surface of the cover 16, and the outer periphery of the expansion ring is slightly larger in diameter than the opening of the inner cup 1, and the expansion ring extends into the opening of the inner cup 1 and is tightly sealed by the flexible feature of the opening of the inner cup 1.

[0053] Preferably, the outer edge 7 of the cover 16 is provided with a plurality of helical wedge elements 19 which are adapted to and correspond to the helical wedge grooves 12; the bottom surface of the helical wedge element 19 facing the mouth of the rigid outer cup 4 is a plane, and the top surface of the helical wedge element 19 facing the one-way protrusion 11 is a helical surface, thereby forming the helical wedge element 19 gradually thickening from one end to the other end. The helical wedge element 19 is screwed into the helical wedge groove 12, so that the cover 16 is connected with the rigid outer cup 4.

[0054] The specific operation is to rotate the cover 16 around the center line, so that the thin end of the helical wedge element 19 first passes through the detent block 15 and enters the helical wedge groove 12. During the rotation stroke, the helical surface of the helical wedge element 19 gradually contacts the helical surface of the one-way protrusion 11 to form a damping locking. A notch is provided at the thick end of the helical wedge element 19, and when the helical wedge element 19 is completely inserted into the helical wedge groove 12, the notch cooperates with the detent block 15 to limit the position.

[0055] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the present application or exceed the defined range. Although the present application is illustrated and described in detail in the accompanying drawings and the foregoing description, such illustration and description are considered to be illustrative or exemplary rather than limiting. It should be understood that changes and modifications can be made by those skilled in the art within the scope of the following claims. Specifically, the present application encompasses additional embodiments having any combination of features from the above different embodiments. In terms of the use of the expressions "generally" or "substantially", the present patent application should be understood to disclose the same full satisfaction of these characteristics and values, i.e. without the aforementioned characterization as "generally" or "substantially".

[0056] In the description of the present application, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

Claims

1. A liquid dispensing cup comprising a cup body having a cup rim periphery disposed progressively further from a cup body centre line, the cup rim having an inner rim proximate the cup body centre line and an outer rim distal from the cup body centre line, characterised in that, The plane where the outer edge is located is not higher than the plane where the inner edge is located, so that the stirring rod only contacts the inner edge during the scraping process of being pulled out from the inside of the cup to the outside.

2. The drip tray of claim 1, wherein, The cup comprises a rigid outer cup and an inner cup, the inner cup has a rim, the rigid outer cup has a rim, the inner cup is received in the rigid outer cup, and the rim is overlapped on the rim to form the inner edge.

3. The drip tray of claim 2, wherein, The outer periphery of the rim is provided with a plurality of locking structures, at least one pair of adjacent locking structures are arranged with a spacing gap, the rim is exposed in the area of the spacing gap to form the outer edge, and the rim corresponds to the inner periphery area of the outer edge to form the inner edge.

4. The cup of claim 3 wherein, The locking structure comprises a tab on the outer edge of the rim, which is parallel to the axis of the rigid outer cup and away from the bottom of the rigid outer cup, a one-way protrusion is arranged on the inner side of the tab towards the center of the cup opening of the rigid outer cup, the surface of the one-way protrusion towards the bottom of the rigid outer cup is a spiral surface, and the spiral surface and the rim form a spiral wedge-shaped groove.

5. The cup of claim 4 wherein, The two ends of the tab are integrally connected with the rim through inclined parts, and the inclined parts and the tab are connected through a circular arc chamfer transition; The outer edge of the rim is provided with a ring-shaped edge parallel to the axis of the rigid outer cup and towards the bottom of the rigid outer cup, and a plurality of support ribs are arranged between the inner side of the ring-shaped edge, the bottom surface of the rim towards the bottom of the rigid outer cup and the outer cup wall of the rigid outer cup.

6. The cup of claim 4 wherein, The rim is provided with a strip-shaped opening corresponding to the one-way protrusion.

7. The cup of claim 4 wherein, The spiral wedge-shaped groove has an inlet and outlet opening end, and a shift block is arranged at the inlet and outlet opening end, and the shift block is a semicircular block or a hemispherical block.

8. A fluid supply, characterized by, The scraping cup comprises a lid matched with the rigid outer cup and the inner cup.

9. The fluid supply of claim 8, wherein, The lid is provided with a fluid outlet for coupling the lid to a spraying device, and the lid is provided with a sealing part matched with the opening of the inner cup.

10. The fluid supply of claim 8, wherein, The outer edge of the lid is provided with a plurality of spiral wedge-shaped elements matched with the spiral wedge-shaped groove one by one; and the spiral wedge-shaped elements are screwed into the spiral wedge-shaped groove to couple the lid with the rigid outer cup.

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