Double tube extruded bottle cap

Abstract

The application discloses a double-tube extrusion bottle cap and relates to the technical field of bottle caps, which comprises a soft tube and a bottle cap arranged at the open end of the soft tube, wherein the soft tube comprises an outer tube and an inner tube, the outer tube is provided with a first liquid outlet hole for discharging liquid in the inner tube and a second liquid outlet hole for discharging liquid in the outer tube, the bottle cap comprises a lower cap rotationally connected with the soft tube, the lower cap is provided with an upper cap in a turnover mode, and the lower cap is provided with a first liquid outlet hole and a second liquid outlet hole; in the rotation stroke of the bottle cap, the following three liquid discharge modes can be realized: mode one, when the first liquid outlet hole is in communication with the second liquid outlet hole and the second liquid outlet hole is in communication with the first liquid outlet hole, the liquid in the inner tube and the liquid in the outer tube can be discharged simultaneously; mode two, when the first liquid outlet hole is in communication with the first liquid outlet hole, the liquid in the inner tube can be discharged; and mode three, when the second liquid outlet hole is in communication with the second liquid outlet hole, the liquid in the outer tube can be discharged.

Description

Technical Field

[0001] This invention relates to the field of bottle cap technology, specifically to dual-tube extrusion bottle caps. Background Technology

[0002] As is generally known, extrusion caps are sealing devices used on the opening of bottles made of plastic or other materials. They typically include a lower cap with an extrusion hole and an upper cap for sealing the extrusion hole. The lower cap is connected to the bottle opening, and the upper cap is connected to the lower cap. When the liquid inside the bottle needs to be used, simply open the outer cap, and the liquid inside can be discharged from the extrusion hole.

[0003] In existing technologies, bottles generally can only hold a single type of liquid. Therefore, users often need to carry multiple bottles containing different liquids, which is cumbersome and inconvenient. To solve this problem, patent CN111268290B, published on May 17, 2024, entitled "A Bottle Capable of Holding Two Types of Liquid Cosmetics," discloses a bottle capable of holding two types of liquid cosmetics. The bottle includes a bottle body, an upper sealing cap, and a conduit. The bottle body and the upper sealing cap are threaded or snap-fitted together. The bottom end of the conduit extends into the bottle body. A base is rotatably mounted on the bottom end of the bottle body. A sealing sheet and an isolator are movably provided inside the bottle body. The top of the isolator is closed and the bottom is open. The sealing sheet has two arc-shaped notches that extend through it. The bottom end of the isolator extends to the underside of the sealing sheet through the two arc-shaped notches. This solution allows two different types of liquid cosmetics to be stored simultaneously and separately in one bottle through the design of various structures. The two cosmetics will not mix before opening and use, thus maintaining the shelf life of the cosmetics. When needed, the two cosmetics can be mixed simply by rotating the base at the bottom of the bottle, reducing the burden on the user and making it more convenient to use.

[0004] In the prior art, some liquids need to be used in combination with another liquid, but they need to be mixed and used immediately to avoid failure after a long mixing time. Sometimes, depending on the usage, the two liquids need to be used separately. The shortcoming of the above patent is that although the two liquids can be mixed, they cannot be separated after mixing, and a single liquid cannot be used alone. Summary of the Invention

[0005] The purpose of this invention is to provide a dual-tube extrusion bottle cap, thereby solving the technical problems in related technologies.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A dual-tube extrusion bottle cap includes a flexible tube and a bottle cap located at the opening of the flexible tube. The flexible tube includes an outer tube and an inner tube. The outer tube has a first outlet hole for liquid to be discharged from the inner tube and a second outlet hole for liquid to be discharged from the outer tube. The bottle cap includes a lower cap rotatably connected to the flexible tube. An upper cap is mounted on the lower cap by flipping. The lower cap has a first outlet and a second outlet hole. During the rotation stroke of the bottle cap, the following three liquid discharge modes can be realized: Mode 1, when the first outlet hole is connected to the second outlet hole and the second outlet hole is connected to the first outlet hole, the liquid in the inner tube and the liquid in the outer tube can be discharged simultaneously; Mode 2, when the first outlet hole is connected to the first outlet hole, the liquid in the inner tube can be discharged; Mode 3, when the second outlet hole is connected to the second outlet hole, the liquid in the outer tube can be discharged.

[0008] As described above, the upper cover is provided with a first sealing plug corresponding to the first liquid outlet and a second sealing plug corresponding to the second liquid outlet.

[0009] As mentioned above, both the outer tube body and the inner tube body are made of soft material, while both the outer tube opening and the inner tube opening are made of hard material.

[0010] As described above, the lower cover has three protrusions arranged circumferentially inside, corresponding to the three liquid dispensing modes, and the outer tube has three recesses arranged circumferentially at its opening. In any liquid dispensing mode, the three protrusions and three recesses correspond one-to-one, and each protrusion is inserted into the corresponding recess.

[0011] As mentioned above, in the rotation direction of the bottle cap, there is a portion where the projection of any protrusion and any recess overlaps. During the insertion stroke of any protrusion and any recess, the resistance given by the recess to the protrusion first increases and then decreases.

[0012] As mentioned above, the lower cover is also equipped with a paddle, and the outer tube has three grooves arranged in sequence along the circumference at the tube opening. During the switching process of the three liquid dispensing modes, the paddle generates sound feedback after being moved by any of the grooves.

[0013] As described above, a button is slidably provided on the upper cover, and a first elastic element is provided between the button and the upper cover. The button is provided with an active latch, and the lower cover is provided with a passive latch. When the upper cover is in the closed position, the active latch engages with the passive latch based on the elastic force of the first elastic element; when the upper cover needs to be opened, the active latch disengages from the passive latch based on the pressing force.

[0014] As mentioned above, a second elastic element is provided at the rotatable connection position between the lower cover and the outer tube. During the rotational stroke of the lower cover in any direction, the resistance provided by the second elastic element to the lower cover gradually increases.

[0015] As mentioned above, the maximum elastic force of the first elastic element is insufficient to cause any protrusion to separate from the corresponding inserted recess.

[0016] As mentioned above, the lower cover is also provided with a trigger. During the closing stroke of the upper cover, the trigger causes each protrusion to separate from the corresponding recessed part based on the squeezing action of the upper cover. Based on the rebound force of the second elastic element, the liquid discharge mode returns to mode one.

[0017] The beneficial effects of the present invention are as follows: by setting a first liquid outlet hole, a second liquid outlet hole, a first liquid outlet and a second liquid outlet, three different communication methods can be realized during the rotation of the bottle cap, so that the liquid in the outer tube and the liquid in the inner tube can be discharged together or separately, thereby allowing different liquid discharge modes to be switched according to the actual use. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a three-dimensional structural diagram of the upper and lower caps of the dual-tube extrusion bottle cap provided in an embodiment of the present invention when they are closed.

[0020] Figure 2 This is a schematic cross-sectional view of the upper and lower caps of the dual-tube extrusion bottle cap provided in an embodiment of the present invention when they are closed.

[0021] Figure 3 This is an exploded view of the upper and lower caps of the double-tube extrusion bottle cap provided in an embodiment of the present invention when they are closed;

[0022] Figure 4 This is a schematic diagram of the planar structure of the inner part of the lower cap and the tube opening of the outer tube of the double-tube extrusion bottle cap provided in an embodiment of the present invention;

[0023] Figure 5 This is a three-dimensional structural diagram of the upper and lower caps of the dual-tube extrusion bottle cap provided in an embodiment of the present invention when they are opened.

[0024] Figure 6 This is a schematic cross-sectional view of the upper and lower caps of the dual-tube extrusion bottle cap provided in an embodiment of the present invention when they are opened.

[0025] Figure 7 This is an exploded view of the upper and lower caps of the dual-tube extrusion bottle cap provided in an embodiment of the present invention when they are opened.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Hose; 10. Outer tube; 11. Inner tube; 12. First outlet; 13. Second outlet; 14. First sealing plug; 15. Second sealing plug; 2. Bottle cap; 20. Top cap; 21. Bottom cap; 22. First outlet; 23. Second outlet; 24. Annular retaining sleeve; 25. Annular retaining groove; 26. Protrusion; 27. Recess; 28. Paddle; 29. ​​Paddle groove; 30. Button; 31. First elastic element; 32. Active latch; 33. Passive latch; 34. Second elastic element; 35. Annular body; 36. Third elastic element. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solution of the present invention, the following will be described in conjunction with the accompanying drawings. Figure 1 To be continued Figure 7 The present invention will now be described in further detail.

[0029] This invention provides a dual-tube extrusion bottle cap, comprising a flexible tube 1 and a bottle cap 2 disposed at the open end of the flexible tube 1. The flexible tube 1 includes an outer tube 10 and an inner tube 11. The outer tube 10 is provided with a first outlet hole 12 for liquid to be discharged from the inner tube 11 and a second outlet hole 13 for liquid to be discharged from the outer tube 10. The bottle cap 2 includes a lower cap 21 rotatably connected to the flexible tube 1. An upper cap 20 is disposed on the lower cap 21 by flipping. The lower cap 21 has a first outlet hole 22 and a second outlet hole 23. The liquid outlet 23 allows for the following three liquid dispensing modes during the rotation of the bottle cap 2: Mode 1: When the first liquid outlet 22 is connected to the second liquid outlet 13 and the second liquid outlet 23 is connected to the first liquid outlet 12, the liquid in the inner tube 11 and the liquid in the outer tube 10 can be discharged simultaneously; Mode 2: When the first liquid outlet 12 is connected to the first liquid outlet 22, the liquid in the inner tube 11 can be discharged; Mode 3: When the second liquid outlet 13 is connected to the second liquid outlet 23, the liquid in the outer tube 10 can be discharged.

[0030] Specifically, in existing technologies, bottles typically only hold a single type of liquid. Therefore, users often need to carry multiple bottles containing different liquids, leading to inconvenience and cumbersome handling. To address this issue, existing technologies combine bottles containing two liquids into a single unit. A cavity for storing the two pastes or liquids is provided within a flexible tube 1. When using the product, the two liquids are simply mixed. However, some liquids require the use of another liquid, and they must be mixed immediately before use to prevent them from becoming ineffective after prolonged mixing. Sometimes, depending on the usage, it is necessary to use two compatible liquids separately. Therefore, to solve the above problem, in this embodiment, the flexible tube 1 is divided into an outer tube 10 and an inner tube 11. The inner wall of the outer tube 10 and the outer wall of the inner tube 11 form a first cavity, which is used to store liquid A. The inner tube 11 itself has a second cavity, which is used to store liquid B. The opening of the inner tube 11 is inserted into the opening of the outer tube 10. The radial cross-section of the opening of the outer tube 10 is circular, and the radial cross-section of the opening of the inner tube 11 is rectangular, that is, the opening of the inner tube 11... There is a channel for liquid A to be discharged between the outer tube 10 and the inlet portion of the outer tube 10. A first outlet hole 12 and a second outlet hole 13 are provided on the inlet portion of the outer tube 10. The first outlet hole 12 communicates with the second cavity and is used to discharge liquid B. The bottle cap 2 consists of an upper cap 20 and a lower cap 21. The lower cap 21 is rotatably mounted on the inlet portion of the outer tube 10 by a snap-fit ​​mechanism (this is prior art and will not be described in detail). The upper cap 20 is mounted on the lower cap 21 by flipping, and the upper cap 20 has an annular retaining sleeve 24. The lower cap 21 has an annular retaining groove 25. During the flipping process towards the lower cover 21, the annular sleeve 24 gradually engages with the annular groove 25. That is, axially, the annular groove 25 restricts the movement of the annular sleeve 24 to a certain extent. Thus, under external force, the upper cover 20 can be flipped away from the lower cover 21. The lower cover 21 has a first liquid outlet 22 and a second liquid outlet 23. By rotating the lower cover 21, the arrangement and combination of the first liquid outlet 12, the second liquid outlet 13, the first liquid outlet 22, and the second liquid outlet 23 can achieve three liquid dispensing modes:

[0031] In Mode 1, when the first liquid outlet 22 is connected to the second liquid outlet 13 and the second liquid outlet 23 is connected to the first liquid outlet 12, the liquid in the inner tube 11 and the liquid in the outer tube 10 can be discharged simultaneously.

[0032] Mode 2: When the first liquid outlet 12 is connected to the first liquid outlet 22, the liquid in the inner tube 11 can be discharged.

[0033] In mode three, when the second liquid outlet 13 is connected to the second liquid outlet 23, the liquid in the outer tube 10 can be discharged.

[0034] In the axial direction, the inner wall of the lower cover 21 slides and fits against the outer wall of the pipe opening portion of the outer tube 10. That is, when in mode two, the second liquid outlet 13 is sealed by the inner wall of the lower cover 21, and the second liquid outlet 23 is sealed by the outer wall of the pipe opening portion of the outer tube 10. When in mode three, the first liquid outlet 12 is sealed by the inner wall of the outer cover, and the second liquid outlet 23 is sealed by the outer wall of the pipe opening portion of the outer tube 10.

[0035] The beneficial effect of this embodiment is that by setting the first liquid outlet 12, the second liquid outlet 13, the first liquid outlet 22 and the second liquid outlet 23, three different communication methods can be realized during the rotation of the bottle cap 2, so that the liquid in the outer tube 10 and the liquid in the inner tube 11 can be discharged together or separately, thereby allowing different liquid discharge modes to be switched according to the actual use.

[0036] Preferably, the upper cover 20 is provided with a first sealing plug 14 corresponding to the first liquid outlet 22 and a second sealing plug 15 corresponding to the second liquid outlet 23. Specifically, in the three liquid outlet modes, after the upper cover 20 and the lower cover 21 are closed, the sealing effect between the upper cover 20 and the lower cover 21 is difficult to effectively seal the first liquid outlet 22 and the second liquid outlet 23 on the lower cover 21. Therefore, in this embodiment, the corresponding parts of the first sealing plug 14 and the second sealing plug 15 on the upper cover 20 have a certain elastic deformation capability. When the lower cover 21 and the upper cover 20 are closed, the first sealing plug 14 and the first liquid outlet 23 are sealed. The liquid outlet 22 is inserted, and the second sealing plug 15 is inserted into the second liquid outlet 23, thereby more effectively preventing liquid leakage. In an optional embodiment, the body of the outer tube 10 and the body of the inner tube 11 are both made of soft material, while the opening of the outer tube 10 and the opening of the inner tube 11 are both made of hard material. In this way, the liquid can be easily discharged by squeezing the hose 1. The use of hard material for the opening can prevent the opening from being squeezed, which would cause gaps between the first sealing plug 14 and the first liquid outlet 22, and between the second sealing plug 15 and the second liquid outlet 23.

[0037] Furthermore, the lower cover 21 has three protrusions 26 arranged circumferentially inside, corresponding to the three liquid dispensing modes, and the outer tube 10 has three recesses 27 arranged circumferentially at its opening. In any liquid dispensing mode, the three protrusions 26 and the three recesses 27 correspond one-to-one, and each protrusion 26 is inserted into the corresponding recess 27. In the rotation direction of the cap 2, any protrusion 26 and any recess 27 have a portion of overlapping projection. During the insertion stroke of any protrusion 26 and any recess 27, the resistance given by the recess 27 to the protrusion 26 first increases and then decreases.

[0038] Specifically, when any dispensing mode is required, the position of the lower cap 21 needs to be restricted to avoid problems such as switching dispensing modes or the inability to achieve any of the three dispensing modes after accidentally touching the cap 2. Therefore, in this embodiment, three protrusions 26 are arranged circumferentially inside the lower cap 21, and three recesses 27 are arranged circumferentially at the opening of the outer tube 10. During the rotation stroke of the lower cap 21, any protrusion 26 can be inserted into any recess 27. During the insertion stroke of the protrusion 26 and the recess 27, there will be a gap between the protrusion 26 and the recess 27. The wedge-shaped fitting portion creates a force that hinders the insertion of the protrusion 26 and the recess 27. When the protrusion 26 and the recess 27 separate, there is also a wedge-shaped fitting between them, which hinders the separation of the protrusion 26 and the recess 27. Thus, in any liquid dispensing mode, the lower cover 21 can be restricted from rotating on the outer tube 10 to a certain extent. During the rotation stroke of the lower cover 21, the resistance provided by the wedge-shaped fitting portion can provide the user with a certain feel, confirming that the liquid dispensing mode has been successfully switched.

[0039] In an optional embodiment, the lower cover 21 is also provided with three corresponding dispensing modes in sequence along the circumference, and the outer tube 10 is provided with three slots 29 in sequence along the circumference. During the switching process of the three dispensing modes, the paddle 28 generates sound feedback after being paddled by the slots 29. Specifically, the sound generated by the paddle 28 and any slot 29 can also provide sound feedback to the user, thereby better determining the dispensing mode switching.

[0040] Furthermore, a button 30 is slidably provided on the upper cover 20, and a first elastic element 31 is provided between the button 30 and the upper cover 20. The button 30 is provided with an active latch 32, and the lower cover 21 is provided with a passive latch 33. When the upper cover 20 is in the closed position, the active latch 32 engages with the passive latch 33 based on the elastic force of the first elastic element 31. When the upper cover 20 needs to be opened, the active latch 32 disengages from the passive latch 33 based on the pressing force.

[0041] Specifically, in the aforementioned embodiments, the locking mechanism between the upper cover 20 and the lower cover 21 after they are closed is achieved by providing an annular retaining sleeve 24 on the upper cover 20 and an annular retaining groove 25 on the lower cover 21. As the upper cover 20 flips towards the lower cover 21, the annular retaining sleeve 24 gradually engages with the annular retaining groove 25. That is, in the axial direction, the annular retaining groove 25 restricts the movement of the annular retaining sleeve 24 to a certain extent. When the liquid in the hose 1 needs to be used, the user can apply force to the upper cover 20 to open the upper cover 20 and the lower cover 21. However, if the upper cover 20 is accidentally touched by an external force, the upper cover 20 and the lower cover 21 may open. This will cause the first sealing plug 14 to disengage from the first liquid outlet 22 and the second sealing plug 15 to disengage from the second liquid outlet 23, thereby causing the liquid to flow out of the hose 1.

[0042] Therefore, based on the above problems, in this embodiment, in addition to the first locking achieved by the cooperation of the annular sleeve 24 and the annular groove 25, a second locking is set between the upper cover 20 and the lower cover 21. That is, a button 30 is slidably arranged on the upper cover 20. The position of the button 30 is radially opposite to the position where the upper cover 20 connects to the lower cover 21, and the sliding direction of the button 30 is also parallel to this radial direction. In addition, a first elastic element 31 is provided between the button 30 and the upper cover 20 in the sliding direction. Based on the elastic force of the first elastic element 31, the button 30 tends to always extend out of the upper cover 20 along the sliding direction. An active latch 32 is arranged on the button 30. The latch of the active latch 32 has a V-shaped structure. A passive latch 33 is arranged on the lower cover 21. The structure of the passive latch 33 is adapted to the latch of the active latch 32. Under the elastic force of the first elastic element 31, when the active latch 32 and the passive latch 33 are engaged, the passive latch 33 will not slide along the sliding direction of the button 30. As the upper cover 20 moves towards the lower cover 21, a wedge-shaped engagement exists between the active latch 32 and the passive latch 33. This wedge-shaped engagement creates a squeezing effect between the active latch 32 and the passive latch 33, increasing the elastic force of the first elastic element 31 driven by the active latch 32. In other words, in the direction of the upper cover 20's deflection, the squeezing effect between the active latch 32 and the passive latch 33 causes the active latch 32 to gradually disengage from the passive latch 33 in the sliding direction of the button 30. This allows the active latch 32's locking mechanism to engage with the passive latch 33, achieving a second layer of locking between the upper cover 20 and the lower cover 21. When the upper cover 20 needs to be opened, the user first presses the button 30. The button 30 moves the active latch 32 along the sliding direction, causing its locking mechanism to disengage from the passive latch 33. Then, pushing the upper cover 20 away from the lower cover 21 allows the second layer of locking to be released before the first layer. This achieves the purpose of preventing accidental contact.

[0043] Furthermore, a second elastic element 34 is provided at the rotatable connection position between the lower cover 21 and the outer tube 10. During the rotational stroke of the lower cover 21 in any direction, the resistance provided by the second elastic element 34 to the lower cover 21 gradually increases.

[0044] Specifically, in the aforementioned embodiments, the tactile and auditory feedback provided to the user during the switching of the three dispensing modes is basically the same. Moreover, the dispensing mode remains the same after the previous use. When the next use is needed, the mode needs to be adjusted, but since the tactile and auditory feedback provided to the user is basically the same, it is difficult for the user to quickly and accurately switch to the desired dispensing mode. Therefore, in this embodiment, a second elastic element 34 is provided between the lower cover 21 and the outer tube 10. The second elastic element 34 provides gradually increasing resistance to the rotation of the lower cover 21. Thus, the initial dispensing mode is mode one. When the lower cover 21 is rotated clockwise or counterclockwise, the elastic force of the second elastic element 34 will gradually increase, so the damping feel provided to the user will also gradually increase, thereby helping the user to better judge the dispensing mode.

[0045] Furthermore, the lower cover 21 is also provided with a trigger. During the closing stroke of the upper cover 20, the trigger causes each protrusion 26 to separate from the corresponding recess 27 based on the squeezing action of the upper cover 20. Based on the rebound force of the second elastic member 34, the liquid discharge mode returns to mode one.

[0046] Specifically, to facilitate users in accurately switching the dispensing mode, this embodiment sets the initial dispensing mode to mode one. After each use, once the lower cover 21 and the upper cover 20 are closed, the dispensing mode can be switched back to mode one. The trigger is a ring body 35 on which three protrusions 26 are arranged. The ring body 35 slides axially on the lower cover 21, and a third elastic element 36 is provided between the ring body 35 and the lower cover 21 in the sliding direction. The passive latch 33 is fixedly connected to the ring body 35. Based on the elastic force of the third elastic element 36, the ring body 35 tends to always drive the three protrusions 26 and the three recesses 27 to engage. During the deflection of the upper cover 20 towards the lower cover 21, the active latch 32 and the passive latch 33 are squeezed together. Under pressure, the sliding directions of buttons 30 are now offset. During the engagement of the active latch 32 and the passive latch 33, since the active latch 32 can only move along the sliding direction of button 30, the active latch 32 will give the passive latch 33 an axial force, causing the passive latch 33 to drive the ring body 35 to move. The ring body 35 will cause the three protrusions 26 and the three recesses 27 to disengage. After the three protrusions 26 and the three recesses 27 are completely disengaged, the rebound force of the second elastic element 34 will cause the lower cover 21 to rotate, so that the liquid dispensing mode returns to mode one. After the upper cover 20 and the lower cover 21 are opened, the ring body 35 will be driven by the rebound force of the third elastic element 36 to engage the three protrusions 26 and the three recesses 27.

[0047] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of the claims of the present invention.

Claims

1. A double tube extruded bottle cap comprising a soft tube and a cap provided at an open end of the soft tube, characterized in that, The soft tube comprises an outer tube and an inner tube, the outer tube is provided with a first liquid outlet hole for liquid in the inner tube to discharge and a second liquid outlet hole for liquid in the outer tube to discharge; the bottle cap comprises a lower cap rotationally connected with the soft tube, the lower cap is provided with an upper cap in a flip manner, the lower cap is provided with a first liquid outlet hole and a second liquid outlet hole; in the rotation stroke of the bottle cap, the following three liquid discharge modes can be realized: Mode one, when the first liquid outlet hole and the second liquid outlet hole are communicated, and the second liquid outlet hole and the first liquid outlet hole are communicated, the liquid in the inner tube and the liquid in the outer tube can be discharged at the same time; Mode two, when the first liquid outlet hole and the first liquid outlet hole are communicated, the liquid in the inner tube can be discharged; Mode three, when the second liquid outlet hole and the second liquid outlet hole are communicated, the liquid in the outer tube can be discharged; The inside of the lower cap is circumferentially provided with three protruding parts corresponding to the three liquid discharge modes, and the tube opening part of the outer tube is circumferentially provided with three recessed parts; in any liquid discharge mode, the three protruding parts and the three recessed parts are one-to-one corresponding, and each protruding part is inserted into the corresponding recessed part. The upper cap is provided with a button, a first elastic member is arranged between the button and the upper cap, the button is provided with a male buckle, the lower cap is provided with a female buckle, and when the upper cap is in the closed position, the male buckle is buckled with the female buckle based on the elastic force of the first elastic member; when the upper cap needs to be opened, the male buckle is separated from the female buckle based on the pressing force; The second elastic member is arranged at the rotation connection position of the lower cap and the outer tube, and the resistance of the second elastic member to the lower cap gradually increases in the rotation stroke of the lower cap in any direction; The lower cap is also provided with a trigger, and in the closing stroke of the upper cap, the trigger separates each protruding part from the corresponding recessed part based on the extrusion of the upper cap, and the liquid discharge mode returns to mode one based on the rebound force of the second elastic member; The trigger arranges the three protruding parts on an annular body, the annular body is axially arranged on the lower cap, and in the sliding direction, the third elastic member is arranged between the annular body and the lower cap, the female buckle is fixedly connected with the annular body, and based on the elastic force of the third elastic member, the annular body has a tendency to always insert the three protruding parts into the three recessed parts.

2. The dual tube extruded cap of claim 1, wherein, The upper cap is provided with a first sealing plug corresponding to the first liquid outlet hole and a second sealing plug corresponding to the second liquid outlet hole.

3. The dual tube extruded cap of claim 1, wherein, The tube body part of the outer tube and the tube body part of the inner tube are made of soft material, and the tube opening part of the outer tube and the tube opening part of the inner tube are made of hard material.

4. The dual tube extruded cap of claim 1, wherein, In the rotation direction of the bottle cap, any protruding part and any recessed part have a projection overlapping part, and in the insertion stroke of any protruding part and any recessed part, the resistance of the recessed part to the protruding part first increases and then decreases.

5. The dual tube extruded cap of claim 3, wherein, The lower cap is also provided with a tab, and the tube opening part of the outer tube is circumferentially provided with three tab slots, and in the switching stroke of the three liquid discharge modes, the tab produces sound feedback after being driven by any tab slot.

6. The dual tube extruded cap of claim 1, wherein, The maximum elastic force of the first elastic member is not enough to separate any protruding part from the corresponding recessed part.

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