A solid-liquid separation bottle cap and bottle

Abstract

This utility model discloses a solid-liquid separation bottle cap and bottle, relating to the field of container technology. The solid-liquid separation bottle cap includes an upper cap, a lower cap, and a cutter. The upper cap has a receiving cavity, and the cutter is inserted into the receiving cavity. The bottom of the receiving cavity is suitable for setting a sealing structure. The lower part of the cutter has a cutting section for destroying the sealing structure. A first thread is provided on the inner wall of the upper cap, and a second thread is provided on the outer wall of the lower cap. A first reverse thread is provided on the inner wall of the lower cap, and a second reverse thread is provided on the outer wall of the cutter. An axial limiting structure is located above the reverse thread structure and spaced apart from it, with the interval being greater than the axial length of the first reverse thread. With this utility model, the solid-liquid separation bottle cap, once the sealing structure is destroyed, cannot be resealed, ensuring that the receiving cavity of the upper cap remains in communication with the internal space of the lower cap, thus meeting the requirement of maintaining a specific state after continuous mixing or separation of solid and liquid.

Description

Technical Field

[0001] This utility model relates to the field of container technology, specifically to a solid-liquid separation bottle cap and bottle. Background Technology

[0002] Solid-liquid separation caps are special caps used to separate and control the mixing of solids and liquids. For some medicines, beverages, or other products that need to be stored separately from liquid solvents, such as certain antibiotics, probiotic preparations, and functional beverages, solid-liquid separation caps can ensure that the medicine remains stable before use, and then the medicine powder is dissolved in the liquid when used, thus ensuring the efficacy and safety of the medicine.

[0003] For example, Chinese patent document CN217075420U discloses a storage screw-type solid-liquid separation bottle cap, which includes: a cap seat, an outer cap, and a cavity. The outer cap and the cap seat are connected by threads. The cavity is inserted into the receiving cavity of the cap seat and connected to the outer cap by a reverse thread structure. When the outer cap is screwed open, the cap seat does not move, and the cavity moves downward through the guide of the reverse thread structure, thereby piercing the sealing structure at the bottom of the receiving cavity of the cap seat.

[0004] However, in the above scheme, the threaded fit between the outer cover and the cover seat, and the reverse threaded fit between the cavity and the outer cover, are real-time linked fits. That is to say, whether the outer cover is rotated clockwise or counterclockwise, the cavity and the outer cover are always linked. For example, when the outer cover is rotated open, the cavity opens the sealing structure at the bottom of the cover seat, and when the outer cover is screwed back on to close, the cavity moves away from the open position of the sealing structure, which makes it easy for the sealing structure to re-seal the bottom of the cover seat, which is not conducive to the full mixing of solid and liquid. Utility Model Content

[0005] In view of this, the present invention provides a solid-liquid separation bottle cap and bottle to solve the problem that the sealing structure of the existing solid-liquid separation bottle cap is easy to re-close after being opened.

[0006] The solid-liquid separation bottle cap provided by this utility model includes: an upper cap, a lower cap, and a cutter. The upper cap has a receiving cavity, and the cutter is inserted into the receiving cavity. The bottom of the receiving cavity is adapted to be provided with a sealing structure, and the lower part of the cutter has a cutting part for destroying the sealing structure.

[0007] The upper cover and the lower cover are connected by a threaded structure, which includes a first thread and a second thread. The first thread is disposed on the inner wall of the upper cover, and the second thread is disposed on the outer wall of the lower cover.

[0008] The cutter is connected to the lower cover by a reverse thread structure, which includes a first reverse thread and a second reverse thread. The first reverse thread is disposed on the inner wall of the lower cover, and the second reverse thread is disposed on the outer wall of the cutter.

[0009] The cutter and the lower cover also have an axial limiting structure, which is located above the reverse thread structure and spaced apart from it. The interval is greater than the axial length of the first reverse thread and / or the second reverse thread.

[0010] The technical solution of this utility model has the following advantages:

[0011] When the upper and lower covers are tightened, the first thread and the second thread are connected to each other, and the first reverse thread and the second reverse thread are also connected to each other. At this time, the cutting part of the cutter is above the sealing structure.

[0012] As the top cover is unscrewed, the cutter moves downwards, and its cutting part damages the sealing structure.

[0013] After the top cover is completely unscrewed from the bottom cover, the first thread and the second thread separate, as do the first reverse thread and the second reverse thread. After the cutter moves downward a certain distance, it will be held in the position where the sealing structure is open by the axial limiting structure.

[0014] When the upper and lower covers are threaded together again, the first thread can connect smoothly with the second thread. However, because there is a certain gap between the axial limiting structure between the cutter and the lower cover and the reverse thread structure, and this gap is greater than the axial length of the first reverse thread, the first and second reverse threads cannot continue to connect. As a result, the sealing structure cannot achieve a seal again, thus keeping the receiving cavity inside the upper cover open.

[0015] In other words, the solid-liquid separation bottle cap provided by this utility model cannot be resealed after the sealing structure is damaged, so that the receiving cavity of the upper cap is always connected with the internal space of the lower cap, which meets the need for solid and liquid to maintain a specific state after continuous mixing or separation.

[0016] Optionally, the axial limiting structure includes an annular flange disposed on the outer wall of the cutter. The annular flange is spaced from the tip of the second reverse thread, the space being greater than the axial length of the first reverse thread. The lower end of the annular flange is adapted to support the tip of the first reverse thread. In the above scheme, the annular flange is spaced from the tip of the second reverse thread and the space is greater than the axial length of the first reverse thread. This not only ensures stable movement of the cutter during its initial downward rotation but also prevents the first and second reverse threads from reconnecting subsequently. The entire bottle cap's operating logic is based on common threaded connections and rotation methods, making it easy to understand and operate. Users can achieve solid-liquid separation and irreversible opening functions simply by operating the cap as if it were a regular bottle cap.

[0017] Optionally, the second reverse thread has multiple segments spaced apart circumferentially. This arrangement reduces the contact area between the cutter and the inner wall of the lower cover during rotation. This means that the friction experienced by the rotary cutter during the operation of breaking the seal structure is reduced, resulting in smoother rotation.

[0018] Optionally, the second reverse thread has a plurality of through holes spaced circumferentially. This arrangement reduces the actual contact area between the cutter and the inner wall of the lower cover at the threaded connection. As the cutter rotates, friction decreases, making operation easier and smoother for the user. Furthermore, when powder enters the thread between the cutter and the inner wall of the lower cover, it can be smoothly discharged through the through holes, preventing powder from causing jamming.

[0019] Optionally, the through-hole extends through multiple threads along the axial direction. This significantly reduces the contact area between the cutter and the inner wall of the lower cover both axially and circumferentially. This further reduces friction during rotation, making the cutter's rotation easier and smoother. Furthermore, this design allows for the efficient discharge of powder from more threads through the through-hole, ensuring smooth twisting.

[0020] Optionally, the first reverse thread has multiple helical segments spaced apart circumferentially, with each helical segment having an equal height. The spaced-apart helical segments reduce the continuous contact area between the cutter and the inner wall of the lower cover, thus reducing friction during rotation. Simultaneously, the multiple helical segments of equal height ensure the relative stability of the resistance experienced by the cutter during rotation. This makes the cutter rotate more smoothly, providing a smoother and more stable rotation experience for the user, avoiding rotational jamming or jumping caused by uneven friction, and improving overall operational comfort and reliability.

[0021] Optionally, the helical segment has three segments evenly spaced circumferentially, each segment having a length less than 1 / 3 turn of the thread. The shorter helical segments ensure that the first reverse thread has a smaller axial length, thus allowing the engagement with the second reverse thread to be released when the first reverse thread enters the gap between the axial limiting structure and the second reverse thread. This ensures that the cutter will not leave the open position of the sealing structure after the top cover is screwed on again.

[0022] Optionally, a circumferential limiting structure is provided between the cutter and the outer wall of the receiving cavity. This circumferential limiting structure allows the cutter to rotate synchronously with the receiving cavity in the circumferential direction and also allows the cutter to move axially relative to the receiving cavity. This arrangement allows the cutter to move axially relative to the receiving cavity, and combined with synchronous circumferential rotation, enables the cutter to approach and effectively disrupt the sealing structure. During the process of unscrewing the top cover, the cutter not only rotates with the receiving cavity but also moves downwards axially, its cutting portion gradually contacting and disrupting the sealing structure, achieving solid-liquid separation.

[0023] Optionally, the circumferential limiting structure includes a limiting protrusion and a limiting groove. The limiting protrusion is disposed on the inner wall of the cutter, and the limiting groove is disposed on the outer wall of the receiving cavity. The limiting groove is a strip-shaped groove extending along the axial direction, and the limiting protrusion is slidably disposed in the limiting groove.

[0024] In the above design, the cooperation between the limiting protrusion and the limiting groove constitutes a reliable circumferential limiting structure. The limiting protrusion is located on the inner wall of the cutter, and the limiting groove is on the outer wall of the receiving cavity. The limiting groove is an axially extending strip-shaped groove in which the limiting protrusion slides. This allows the limiting protrusion to move along the limiting groove when the cutter rotates, strictly limiting the circumferential position of the cutter relative to the receiving cavity and ensuring that both rotate synchronously in the circumferential direction. The axially extending limiting groove allows the limiting protrusion to slide smoothly within it, providing space for the cutter to move axially. During the process of unscrewing the top cover, while the cutter rotates synchronously in the circumferential direction, it can move smoothly along the axial direction of the limiting groove, gradually approaching and breaking the sealing structure.

[0025] The bottle provided by this utility model includes a bottle body and a solid-liquid separation bottle cap as described in any of the above-mentioned solutions, wherein the solid-liquid separation bottle cap is detachably and sealed to the bottle body.

[0026] The bottle provided by this utility model has the advantages of any one of the above-described solutions because it adopts the solid-liquid separation cap. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is an exploded view of a solid-liquid separation bottle cap according to an embodiment of the present utility model;

[0029] Figure 2 for Figure 1 The diagram shows a front view sectional view of the three-dimensional structure of the solid-liquid separation bottle cap after assembly.

[0030] Figure 3 for Figure 2 Enlarged schematic diagram of the lower middle cover;

[0031] Figure 4 for Figure 2 Enlarged schematic diagram of the upper and middle covers;

[0032] Figure 5 for Figure 2 Enlarged schematic diagram of the medium cutter;

[0033] Figure 6 This is a top view of the lower cover;

[0034] Figure 7 for Figure 2 A bottom view after removing the first sealing strip;

[0035] Figure 8 This is a perspective sectional view of a bottle according to an embodiment of the present utility model;

[0036] Figure 9 for Figure 8 A three-dimensional sectional view of the middle bottle.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Top cover; 2. Bottom cover; 3. Cutter; 4. Receiving cavity; 5. First sealing plate; 6. Annular boss; 7. Anti-theft ring; 8. First thread; 9. Second thread; 10. First reverse thread; 11. Second reverse thread; 12. Annular flange; 13. Through hole; 14. Limiting protrusion; 15. Limiting groove; 16. Bottle body; 17. Second sealing plate. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0040] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0043] like Figures 1-7 The image shows a specific embodiment of the solid-liquid separation bottle cap provided in this example, comprising: an upper cap 1, a lower cap 2, and a cutter 3. The upper cap 1 has a receiving cavity 4, and the cutter 3 is inserted into the receiving cavity 4. The bottom of the receiving cavity 4 is adapted to have a sealing structure, and the lower part of the cutter 3 has a cutting portion for destroying the sealing structure. It should be noted that the sealing structure is generally a sealing sheet. In use, the upper cap 1, lower cap 2, and cutter 3 are first assembled, the bottle cap is flipped over, and powder or liquid is placed into the receiving cavity 4 of the upper cap 1. Then, the sealing sheet is installed into the opening of the receiving cavity 4.

[0044] like Figure 2As shown, the sealing structure in this embodiment is a first sealing sheet 5. When the first sealing sheet 5 seals the opening of the receiving cavity 4 of the upper cover 1, it is a contact seal and no adhesive connection is made. The periphery of the first sealing sheet 5 is bonded to the lower cover 2. The cutter 3 is located inside the adhesive area of ​​the first sealing sheet 5. With this arrangement, when the cutting part of the cutter 3 moves downward, it can pierce the first sealing sheet 5, thereby causing the powder in the receiving cavity 4 to flow out.

[0045] like Figure 2 , Figure 3 As shown, the lower cover 2 has a downward-facing annular protrusion 6, which is used to receive the first sealing sheet 5, thereby bonding it to the periphery of the first sealing sheet 5. The height of the annular protrusion 6 is equal to the height of the opening of the receiving cavity 4. With this configuration, when the first sealing sheet 5 is sealed and bonded to the annular protrusion 6, the first sealing sheet 5 abuts against the opening of the receiving cavity 4 to form a seal.

[0046] like Figure 1 , Figure 2 As shown, there is an anti-theft ring 7 between the upper cover 1 and the lower cover 2, and the anti-theft device can be connected to the upper cover 1 and / or the lower cover 2 by a break point.

[0047] like Figures 2-4 As shown, the upper cover 1 and the lower cover 2 are connected by a threaded structure, which includes a first thread 8 and a second thread 9. The first thread 8 is disposed on the inner wall of the upper cover 1, and the second thread 9 is disposed on the outer wall of the lower cover 2.

[0048] like Figure 4 , Figure 5 As shown, the cutter 3 is connected to the lower cover 2 by a reverse thread structure, which includes a first reverse thread 10 and a second reverse thread 11. The first reverse thread 10 is disposed on the inner wall of the lower cover 2, and the second reverse thread 11 is disposed on the outer wall of the cutter 3.

[0049] like Figure 5 As shown, the cutter 3 and the lower cover 2 also have an axial limiting structure. The axial limiting structure is located above the reverse thread structure and is spaced apart from the reverse thread structure. The interval is greater than the axial length of the first reverse thread 10. In some alternative embodiments, the interval may also be greater than the axial length of the second reverse thread 11, or greater than the axial lengths of both the first reverse thread 10 and the second reverse thread 11.

[0050] In this embodiment, when the upper cap 1 and the lower cap 2 are tightened, the first thread 8 and the second thread 9 are connected to each other, and the first reverse thread 10 and the second reverse thread 11 are also connected to each other. At this time, the cutting part of the cutter 3 is above the sealing structure.

[0051] During the process of unscrewing the top cover 1, the cutter 3 will move downwards, and its cutting part will damage the sealing structure.

[0052] After the upper cover 1 is completely unscrewed from the lower cover 2, the first thread 8 and the second thread 9 separate from each other, and the first reverse thread 10 and the second reverse thread 11 also separate. After the cutter 3 moves downward a certain distance, it will be held in the position where the sealing structure is open by the axial limiting structure.

[0053] When the upper cover 1 and lower cover 2 are threaded together again, the first thread 8 can connect smoothly with the second thread 9. However, because there is a certain gap between the axial limiting structure between the cutter 3 and the lower cover 2 and the reverse thread structure, and this gap is greater than the axial length of the first reverse thread 10, the first reverse thread 10 and the second reverse thread 11 cannot continue to connect. As a result, the sealing structure cannot achieve a seal again, thus keeping the receiving cavity 4 inside the upper cover 1 open.

[0054] In other words, the solid-liquid separation bottle cap provided in this embodiment cannot be resealed after the sealing structure is damaged, so that the receiving cavity 4 of the upper cover 1 is always connected with the internal space of the lower cover 2, which meets the requirement of maintaining a specific state after the solid and liquid are continuously mixed or separated.

[0055] like Figure 4 As shown, in this embodiment, the axial limiting structure includes an annular flange 12, which is disposed on the outer wall of the cutter 3. The annular flange 12 is spaced from the top end of the second reverse thread 11, and the space is greater than the axial length of the first reverse thread 10. The lower end of the annular flange 12 is adapted to support the top end of the first reverse thread 10. In the above scheme, the annular flange 12 is spaced from the top end of the second reverse thread 11 and the space is greater than the axial length of the first reverse thread 10. This not only ensures the stable movement of the cutter 3 during its initial downward rotation but also prevents the first reverse thread 10 from reconnecting with the second reverse thread 11 subsequently. The entire bottle cap operation logic is based on common threaded connections and rotation methods, making it easy to understand and operate. Users only need to operate the cap 1 as if they were normally unscrewing a bottle cap to achieve solid-liquid separation and irreversible opening functions. Of course, the above description is not limiting. In some alternative embodiments, the annular flange 12 can be a discontinuous multi-segment structure.

[0056] like Figure 1 , Figure 5As shown, in this embodiment, the second reverse thread 11 has multiple segments spaced apart along the circumference. This arrangement reduces the contact area between the cutter 3 and the inner wall of the lower cover 2 when rotating. This means that when the rotating cutter 3 performs the operation to break the sealing structure, the frictional force it experiences is reduced, and the rotation is smoother.

[0057] like Figure 1 , Figure 5 As shown, in this embodiment, the second reverse thread 11 has a plurality of through holes 13 spaced circumferentially. This arrangement reduces the actual contact area between the cutter 3 and the inner wall of the lower cover 2 at the threaded connection. When the cutter 3 rotates, the friction decreases, making operation easier and smoother for the user. Furthermore, when powder enters the thread between the cutter 3 and the inner wall of the lower cover 2, it can be smoothly discharged through the through holes 13, preventing powder from causing jamming. Of course, the above description is not limiting; in some alternative embodiments, the through holes 13 can be omitted.

[0058] like Figure 1 , Figure 5 As shown, in this embodiment, the through hole 13 has multiple threads extending through it axially. The through hole 13's axial extension through multiple threads significantly reduces the contact area between the cutter 3 and the inner wall of the lower cover 2 both axially and circumferentially. This further reduces friction during rotation, making the rotation of the cutter 3 easier and smoother. Furthermore, this design allows for the smooth discharge of powder from more threads via the through hole 13, ensuring smooth twisting.

[0059] like Figure 3 , Figure 6 As shown, in this embodiment, the first reverse thread 10 has multiple helical segments spaced apart circumferentially, and the height of the multiple helical segments is equal. The spaced helical segments reduce the continuous contact area between the cutter 3 and the inner wall of the lower cover 2, reducing the friction during rotation. At the same time, the multiple helical segments of equal height ensure the relative stability of the resistance experienced by the cutter 3 during rotation. This makes the cutter 3 rotate more smoothly, allowing the user to experience a smoother and more stable rotation, avoiding rotational jamming or jumping caused by uneven friction, and improving the overall comfort and reliability of operation.

[0060] like Figure 3 , Figure 6As shown, in this embodiment, the spiral segment has three segments evenly spaced circumferentially, and the length of each spiral segment is less than 1 / 3 of the length of a thread turn. The shorter spiral segment ensures that the first reverse thread 10 has a smaller axial length, so that when the first reverse thread 10 enters the gap between the axial limiting structure and the second reverse thread 11, the engagement with the second reverse thread 11 can be released, thereby ensuring that after the top cover 1 is screwed on again, the cutter 3 will not leave the open position of the sealing structure.

[0061] In this embodiment, a circumferential limiting structure is provided between the cutter 3 and the outer wall of the receiving cavity 4. This circumferential limiting structure allows the cutter 3 to rotate synchronously with the receiving cavity 4 in the circumferential direction, and also allows the cutter 3 to move axially relative to the receiving cavity 4. This arrangement, combined with the synchronous circumferential rotation, allows the cutter 3 to approach and effectively disrupt the sealing structure. During the unscrewing of the upper cover 1, the cutter 3 not only rotates with the receiving cavity 4 but also moves downwards axially, its cutting portion gradually contacting and disrupting the sealing structure, thus achieving solid-liquid separation.

[0062] like Figure 5 , Figure 7 As shown, the circumferential limiting structure includes a limiting protrusion 14 and a limiting groove 15. The limiting protrusion 14 is disposed on the inner wall of the cutter 3, and the limiting groove 15 is disposed on the outer wall of the receiving cavity 4. The limiting groove 15 is a strip-shaped groove extending along the axial direction, and the limiting protrusion 14 is slidably disposed in the limiting groove 15.

[0063] In the above scheme, the cooperation between the limiting protrusion 14 and the limiting groove 15 constitutes a reliable circumferential limiting structure. The limiting protrusion 14 is located on the inner wall of the cutter 3, and the limiting groove 15 is located on the outer wall of the receiving cavity 4. The limiting groove 15 is a strip-shaped groove extending axially, in which the limiting protrusion 14 slides. This allows the limiting protrusion 14 to move along the limiting groove 15 when the cutter 3 rotates, strictly limiting the circumferential position of the cutter 3 relative to the receiving cavity 4 and ensuring that the two rotate synchronously in the circumferential direction. The axially extending limiting groove 15 allows the limiting protrusion 14 to slide smoothly in it, providing space for the cutter 3 to move axially. During the process of unscrewing the top cover 1, while the cutter 3 rotates synchronously in the circumferential direction, it can move smoothly along the axial direction of the limiting groove 15, gradually approaching and destroying the sealing structure.

[0064] Of course, the above description is not limiting. In some alternative embodiments, the positions of the limiting protrusion 14 and the limiting groove 15 can be interchanged.

[0065] The working principle of the solid-liquid separation bottle cap provided in this embodiment is as follows:

[0066] During assembly: First, assemble the upper cover 1, lower cover 2, and cutter 3. Flip the bottle cap over and fill the upper cover 1 cavity 4 with powder or liquid. Then, install the first sealing piece 5 onto the opening of the cavity 4. The periphery of the first sealing piece 5 is bonded to the annular protrusion 6 of the lower cover 2, and it contacts and seals the opening of the cavity 4. The cutter 3 is located inside the bonding area.

[0067] When the upper cover 1 and the lower cover 2 are tightened, the threaded structures of the upper cover 1 and the lower cover 2 (first thread 8 and second thread 9) and the reverse threaded structure of the cutter 3 and the lower cover 2 (first reverse thread 10 and second reverse thread 11) are connected respectively, and the cutting part is above the sealing structure.

[0068] When the top cover 1 is unscrewed, the cutter 3 moves downwards, and the cutting part breaks the sealing structure. After the top cover 1 is completely unscrewed, the two sets of threaded structures separate, and the cutter 3 remains in the position where the sealing structure is open due to the axial limiting structure.

[0069] When the upper cover 1 and the lower cover 2 are screwed on again, the threads of the upper cover 1 and the lower cover 2 can be connected smoothly. However, because the axial limiting structure and the reverse thread structure between the cutter 3 and the lower cover 2 are larger than the axial length of the first reverse thread 10, the first reverse thread 10 and the second reverse thread 11 cannot be connected again. The sealing structure cannot be sealed again, and the internal space of the receiving cavity 4 and the lower cover 2 remain connected to meet the requirement of continuous solid-liquid mixing.

[0070] like Figure 8 , Figure 9 As shown, an embodiment of this utility model also provides a bottle, including a bottle body 16 and a solid-liquid separation cap, wherein the solid-liquid separation cap is detachably and sealingly connected to the bottle body 16. Specifically, the solid-liquid separation cap is threadedly connected to the bottle body 16.

[0071] When using, first seal the opening of the bottle body 16 with the second sealing piece 17, and then screw the lower cap 2 of the solid-liquid separation bottle cap onto the opening of the bottle body 16 through the thread.

[0072] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the present invention.

Claims

1. A solid-liquid separation bottle cap, characterized in that, include: The upper cover (1), the lower cover (2), and the cutter (3) are provided. The upper cover (1) has a receiving cavity (4). The cutter (3) is inserted into the receiving cavity (4). The bottom of the receiving cavity (4) is adapted to be provided with a sealing structure. The cutter (3) has a cutting part below it for destroying the sealing structure. The upper cover (1) and the lower cover (2) are connected by a threaded structure, which includes a first thread (8) and a second thread (9). The first thread (8) is disposed on the inner wall of the upper cover (1), and the second thread (9) is disposed on the outer wall of the lower cover (2). The cutter (3) and the lower cover (2) are connected by a reverse thread structure, which includes a first reverse thread (10) and a second reverse thread (11). The first reverse thread (10) is disposed on the inner wall of the lower cover (2), and the second reverse thread (11) is disposed on the outer wall of the cutter (3). The cutter (3) and the lower cover (2) also have an axial limiting structure. The axial limiting structure is located above the reverse thread structure and is spaced apart from the reverse thread structure. The interval is greater than the axial length of the first reverse thread (10) and / or the second reverse thread (11).

2. The solid-liquid separation bottle cap according to claim 1, characterized by The axial limiting structure includes an annular flange (12), which is disposed on the outer wall of the cutter (3). The annular flange (12) is spaced from the top end of the second reverse thread (11), and the lower end of the annular flange (12) is adapted to be supported on the top end of the first reverse thread (10).

3. The solid-liquid separation bottle cap according to claim 1, wherein The second reverse thread (11) has multiple segments spaced apart along the circumferential direction.

4. The solid-liquid separation bottle cap according to claim 1, characterized in that, The second reverse thread (11) has a plurality of through holes (13) spaced apart circumferentially.

5. The solid-liquid separation bottle cap according to claim 4, wherein The through hole (13) is axially perforated by multiple threads.

6. The solid-liquid separation bottle cap according to claim 1, wherein The first reverse thread (10) has a plurality of helical segments spaced apart circumferentially, and the plurality of helical segments have equal heights.

7. The solid-liquid separation bottle cap according to claim 6, wherein The helical segment has three segments evenly spaced along the circumference, and the length of each helical segment is less than 1 / 3 of the length of a thread turn.

8. The solid-liquid separation bottle cap according to any one of claims 1 to 7, characterized in that, The cutter (3) has a circumferential limiting structure between it and the outer wall of the receiving cavity (4). The circumferential limiting structure allows the cutter (3) and the receiving cavity (4) to rotate synchronously in the circumference and allows the cutter (3) to move axially relative to the receiving cavity (4).

9. The solid-liquid separation bottle cap according to claim 8, wherein The circumferential limiting structure includes a limiting protrusion (14) and a limiting groove (15). The limiting protrusion (14) is disposed on the inner wall of the cutter (3), and the limiting groove (15) is disposed on the outer wall of the receiving cavity (4). The limiting groove (15) is a strip-shaped groove extending along the axial direction, and the limiting protrusion (14) is slidably disposed in the limiting groove (15).

10. A bottle characterized in that include: The bottle body (16) and the solid-liquid separation bottle cap according to any one of claims 1-9, wherein the solid-liquid separation bottle cap is detachably and sealingly connected to the bottle body (16).

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