A dosing discharge hose

Abstract

The application discloses a kind of quantitative discharge hose, belong to soft package structure technical field, including first cover and the discharge component in first cover, the discharge component includes connector and disc, the discharge component with the first cover forms sealed cavity, the connector is relative the disc rotation and is connected in the first cover, the connector is equipped with first through-hole, the disc is equipped with second through-hole.In the scheme, when the first through-hole on connector and the second through-hole on disc are aligned, the exhaust hole of sealed cavity is blocked, so that negative pressure is formed in sealed cavity, and then material is introduced into sealed cavity from aligned first through-hole and second through-hole, since the axial movement distance of connector and disc is fixed each time, the volume discharged by sealed cavity is the same, that is, the material introduced into sealed cavity is the same, so as to realize the effect of quantitative discharge.

Description

Technical Field

[0001] This invention relates to a flexible tube packaging structure technology, and more specifically, to a quantitative dispensing flexible tube. Background Technology

[0002] In the cosmetics industry, tube packaging has unique advantages. It is typically small, lightweight, and easy to carry, making it suitable for travel or outings. Compared to other packaging materials, tube packaging has lower production costs. Furthermore, tube packaging usually features a squeeze design, making it convenient for one-handed operation. Therefore, many products prioritize tube packaging. However, tube packaging presents challenges in controlling the amount of product used, especially for highly fluid contents. Additionally, for inexperienced users, such as children, it can be difficult to properly control the dosage, often resulting in product waste and contamination, negatively impacting the user experience. Most existing dispensing equipment is either structurally complex or not well-suited for tubes.

[0003] For example, Chinese Patent Publication No. CN110642211B, published on December 3, 2021, entitled "A Quantitative Dispensing Device for Water-based Emulsion Cosmetics Using Pressure Difference," discloses a quantitative dispensing device including a slide rail. A housing is slidably connected to the surface of the slide rail, and a rotating plate is slidably connected inside the housing. A bushing is fixedly connected to the surface of the rotating plate, and a quantitative hole is opened on the surface of the bushing. This solution achieves the effect of quantitative filling without dripping. However, the structure of this solution is complex and it cannot be effectively applied to quantitative dispensing of tube-type packaging. Summary of the Invention

[0004] This invention overcomes the problem that existing quantitative dispensing hoses are complex in structure and cannot be applied to flexible packaging, and provides a quantitative dispensing hose with a simple structure that can be effectively applied to quantitative dispensing of flexible packaging, thereby improving the user experience of the product.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a quantitative discharge hose, including a first cover and a discharge assembly located in the first cover, the discharge assembly including a connector and a disc, the discharge assembly and the first cover forming a sealed cavity, the connector rotating relative to the disc and spirally connected to the first cover, the connector having a first through hole, and the disc having a second through hole. In this design, the first through hole on the connector and the second through hole on the disc are used for material discharge and guiding. The connector and the first cover are spirally connected, allowing the first and second through holes to be aligned or misaligned. When the first through hole on the connector and the second through hole on the disc are misaligned, a sealed cavity is formed between the discharge assembly and the first cover. As the connector rotates relative to the first cover, the volume of the sealed cavity between the first cover and the connector decreases, and the gas inside the sealed cavity is discharged. When the first through hole on the connector is aligned with the second through hole on the disc, the vent hole of the sealed cavity is blocked, creating a negative pressure inside the sealed cavity. This allows the material to be guided into the sealed cavity from the aligned first and second through holes. Since the axial movement distance of the connector and the disc is fixed each time, the volume discharged from the sealed cavity is the same, meaning that the material introduced into the sealed cavity is the same, thus achieving a quantitative discharge effect.

[0006] Preferably, the connector has a lower sealing wall, and the first cover has an upper sealing wall. The lower sealing wall and the upper sealing wall cooperate to form the sealed cavity, and the first through hole is located inside the sealed cavity. The lower sealing wall and the upper sealing wall need to fit tightly, but still need to be able to rotate relative to each other to ensure that the vacuum degree inside the sealed cavity is the same every time material is fed; the first through hole can ensure that material is conveyed into the sealed cavity.

[0007] Preferably, the connector is provided with a pivot portion located within the sealed cavity, and an elastic element is provided between the pivot portion and the first cover. The pivot portion is positioned in the middle of the connector and can be used to fix one end of the elastic element, while the other end of the elastic element abuts against the inner side of the first cover. The elastic element allows the connector to return to its initial position, ensuring consistent and stable feeding each time.

[0008] Preferably, the rotating shaft portion near the disc is a hollow column, and the disc has a protruding post that rotatably engages with the hollow column. Since the disc and connector rotate relative to each other, a rotatable connection is required between them. Specifically, a hollow column is formed on the rotating shaft portion near the disc, and the protruding body on the disc engages with the hollow column, thus ensuring relative rotation between the disc and the connector.

[0009] Preferably, the first cover is provided with a discharge hole, and a one-way valve is provided inside the discharge hole. The discharge hole is used for material discharge (extrusion), and the one-way valve can open during each connector lifting process to discharge the gas in the sealed cavity, thereby creating a negative pressure in the sealed cavity.

[0010] Preferably, the system also includes a flexible hose with a discharge port that is sealed to the first cover and abuts against the discharge assembly. The hose stores material, which enters through the discharge port into the sealed cavity between the connector and the first cover. The first cover and the discharge port are sealed and fixedly connected to prevent the first cover from being ejected from the hose during compression.

[0011] Preferably, the radial position of the second through hole corresponds to the radial position of the first through hole, and the circumferential dimension of the second through hole is larger than that of the first through hole. The second through hole and the first through hole are aligned in the radial position, so that when the first through hole rotates, it can be aligned with the second through hole. The larger circumferential dimension of the second through hole ensures the maximum possible output.

[0012] Preferably, the second through hole is a cylindrical elongated hole, and the first through hole is integrally formed with the lower sealing wall. Designing the first through hole as a cylindrical elongated hole can, on the one hand, increase the strength of various walls in the connector (including the bottom surface of the connector, the lower sealing wall, etc.) and make the structure more stable. On the other hand, during the material discharge process, a certain amount of material will also be filled into the cylindrical elongated hole, which can act as a seal to prevent gas in the sealed cavity from flowing back into the hose, causing changes in the vacuum degree (or pressure difference), thus making it impossible to guarantee that the material discharge is the same each time.

[0013] Preferably, the system also includes a second cover, which is disposed on the first cover. The first cover has a retaining groove that engages with the discharge hole. The second cover encloses the upper surface of the first cover to prevent contamination of the exterior of the first cover. The retaining groove in the second cover engages with the discharge hole to form a fixed connection.

[0014] Preferably, the connector has a notch on its mating surface with the first cover. This notch on the contact surface of the connector with the first cover ensures proper assembly and reduces rotational friction between the connector and the first cover, thus guaranteeing good material discharge.

[0015] Compared with the prior art, the beneficial effects of the present invention are: (1) using a disc and connector as an adjustable sealing cavity closure channel, a spiral groove and a slider as a mechanism to drive the channel switch, and achieving automatic feeding under the action of a spring; (2) without changing the pressing method of the hose, realizing the quantitative discharge function of the hose; (3) with a simple structure, suitable for products with quantitative discharge in soft packaging. Attached Figure Description

[0016] Figure 1 This is an exploded view of the present invention.

[0017] Figure 2 This is a cross-sectional view of the present invention.

[0018] Figure 3 This is an isometric view of the present invention.

[0019] Figure 4 This is a cross-sectional view of the first cover of the present invention.

[0020] Figure 5 This is a schematic diagram of the connector and disc before assembly according to the present invention.

[0021] In the diagram: 1. First cover, 2. Connector, 3. Disc, 4. Sealed cavity, 5. First through hole, 6. Second through hole, 7. Lower sealing wall, 8. Upper sealing wall, 9. Rotating shaft, 10. Elastic element, 11. Hollow column, 12. Protrusion, 13. Discharge hole, 14. One-way valve, 15. Hose, 16. Discharge port, 17. Second cover, 18. Snap groove, 19. Notch, 20. First mating surface, 21. Second mating surface, 22. Spiral groove, 23. Slider, 24. Groove, 25. Rotating ring, 26. Limiting protrusion. Detailed Implementation

[0022] The technical solution of the present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0023] Example 1: As Figures 1 to 5 The illustrated quantitative dispensing hose includes a hose 15, a first cover 1, and a dispensing assembly located within the first cover 1. The upper part of the hose 15 is a dispensing port 16. The first cover 1 is cylindrical and can be fitted and engaged with the dispensing port 16 on the hose 15 while ensuring a sealing effect. The dispensing assembly includes a connector 2 and a disc 3, which rotate relative to each other. A first mating surface 20 is provided on the inner side of the first cover 1 to mate with the connector 2, while a second mating surface 21 on the connector 2 rotates with the first mating surface 20. Specifically, as shown... Figure 2 or Figure 4 as well as Figure 5As shown, a spiral groove 22 is provided on the first mating surface 20 of the first cover 1, and a slider 23 adapted to the spiral groove 22 is provided on the second mating surface 21 of the connector 2. When the connector 2 rotates relative to the first cover 1, under the action of the slider 23 and the spiral groove 22, the connector 2 not only rotates, but also moves and rises along the axial direction of the first cover 1, thereby compressing the space between the connector 2 and the first cover 1.

[0024] An upper sealing wall 8 is provided inside the first cover 1, and a lower sealing wall 7 is provided on the connector 2. Similarly, both the upper sealing wall 8 and the lower sealing wall 7 are cylindrical sidewalls. The upper sealing wall 8 and the lower sealing wall 7 are fitted together internally and externally, thereby forming a sealed cavity 4 inside. When the connector 2 moves axially inside the first cover 1, the upper sealing wall 8 and the lower sealing wall 7 will move closer or further apart axially, thereby changing the size of the sealed cavity 4.

[0025] A disc 3 is located on the side of connector 2 away from the first cover 1, that is, at the bottom of connector 2. Disc 3 is rotatably connected to the bottom of connector 2. Specifically, a pivot 9 is provided on connector 2, located at the center of connector 2. The bottom of pivot 9 is a hollow column 11, and a protruding column 12 is provided above disc 3. The protruding column 12 and the hollow column 11 cooperate to connect connector 2 and disc 3 together. It should be noted that a groove 24 is provided inside the hollow column 11, and a rotating ring 25 is provided on the protruding column 12. The rotating ring 25 is fitted inside the groove 24, thus ensuring that the protruding column 12 and the hollow column 11 do not detach, and also ensuring relative rotation between the protruding column 12 and the hollow column 11, that is, ensuring the rotational effect between connector 2 and disc 3.

[0026] A first through hole 5 is provided on connector 2, and a second through hole 6 is provided on disc 3. In the initial state, the positions of the first through hole 5 and the second through hole 6 are offset from each other. Only when the discharge assembly rotates inside the first cover 1 will the first through hole 5 and the second through hole 6 be aligned and connected to achieve discharge. Specifically, disc 3 is located at the discharge port 16 of hose 15. The second through hole 6 on disc 3 is close to the bottom of connector 2. When the user presses hose 15, the internal pressure of hose 15 increases, and the material pushes the bottom of disc 3. In turn, disc 3 pushes connector 2 to move axially along the first cover 1. At the same time, connector 2 rotates relative to the first cover 1 and disc 3 until the first through hole 5 on connector 2 and the second through hole 6 on disc 3 are aligned. The axial movement of connector 2 and disc 3 inside the first cover 1 will then stop. Under the pressure inside hose 15, material enters the sealed cavity 4 through the first through hole 5 and the second through hole 6.

[0027] It should be noted that a discharge hole 13 is also provided on the first cover 1. The discharge hole 13 protrudes slightly from the upper outer surface of the first cover 1. A one-way valve 14 is provided inside the discharge hole 13. The conduction path of the one-way valve 14 is open from the inside of the first cover 1 to the outside of the first cover 1, but closed from the outside of the first cover 1 to the inside of the first cover 1. When the discharge assembly undergoes axial displacement relative to the inside of the first cover 1 and is lifted (lifting is relative to the inside of the first cover 1), Figure 2 When the orientation shown is such that the volume of the sealed cavity 4 between the connector 2 and the first cover 1 decreases, the internal pressure increases, thereby opening the one-way valve 14 to perform an exhaust operation. When the pressure inside the sealed cavity 4 is the same as the external pressure, the one-way valve 14 is in the closed state. When the discharge component undergoes axial displacement relative to the inside of the first cover 1 or has a tendency to fall back (falling back is relative to the inside of the first cover 1), the discharge component will be discharged. Figure 2 When the orientation shown is such that a negative pressure is formed in the sealed cavity 5, it will prevent the discharge component from falling back and maintain the state of the discharge component at this time.

[0028] An elastic element 10 is also provided between the first cover 1 and the connector 2. Specifically, the elastic element 10 is a spring structure, with one end connected to the rotating shaft 9 in the middle of the connector 2 and the other end abutting against the inner surface of the first cover 1. When the discharge assembly undergoes axial displacement relative to the first cover 1, the elastic element 10 will enter a potential energy storage or potential energy release state. This can improve the movement stability of the discharge assembly on the one hand, and ensure that the discharge assembly returns to its initial state on the other hand, ensuring that the discharge amount is the same each time.

[0029] The specific working principle of this scheme is as follows. Initially, the first through hole 5 and the second through hole 6 are offset. First, the user squeezes the hose 15, increasing the internal pressure. This causes the material inside the hose 15 to exert pressure on the disc 3 at the outlet 16 of the hose 15, thus causing the disc 3 to push against the bottom of the connector 2. That is, the disc 3 and connector 2 tend to axially lift relative to the first cover 1. Under the action of the spiral groove 22 on the first cover 1 and the slider 23 on the connector 2, the connector 2 will axially lift relative to the first cover 1 while also rotating relative to the first cover 1 and the disc 3. The second mating surface 21 on the connector 2 and the first mating surface 20 on the first cover 1 approach each other. The volume of the sealed cavity 4 formed by the first mating surface 20 and the second mating surface 21 gradually decreases, and the pressure inside the sealed cavity 4 gradually increases. When the pressure inside the sealed cavity 4 is greater than the external pressure, the first cover 1... The one-way valve 14 is opened, allowing the gas in the sealed cavity 4 to be discharged from the discharge hole 13 on the first cover 1 until the first through hole 5 on the connector 2 rotates to the position aligned with the second through hole 6 on the disc 3. At this point, the material in the hose 15 no longer pushes the disc 3 and the connector 2 to move. Under the action of the one-way valve 14, the pressure in the sealed cavity 4 will quickly reach a state of equilibrium with the external air pressure (including the threshold pressure of the one-way valve 14), thus the one-way valve 14 closes and no longer performs venting operation (or venting is reduced). At this point, the user can release the hose 15 and stop pressing it. Under the action of the elastic element 10, the connector 2 and the disc 3 have a tendency to fall back, causing a negative pressure to be formed in the sealed cavity 4. Under the action of the negative pressure in the sealed cavity 4, the material in the hose 15 will enter the sealed cavity 4 formed between the connector 2 and the first cover 1 through the first through hole 5 and the second through hole 6 to compensate for the negative pressure effect in the sealed cavity 4. When the pressure inside the sealed cavity 4 is the same as the pressure inside the hose 15, the material inside the hose 15 has fully filled the space occupied by the extruded gas. The material inside the hose 15 will no longer enter the sealed cavity 4 through the first through hole 5 and the second through hole 6, and under the action of the elastic element 10, the connector 2 and the disc 3 will fall back to their initial positions. This completes the first pressing and feeding operation.

[0030] Since the displacement of connector 2 and disc 3 inside the first cover 1 remains constant, the amount of material fed by each press is the same. By repeatedly pressing the hose 15, the effect of quantitative material discharge can be achieved.

[0031] It should be noted that a sealing treatment is also adopted between the first cover 1 and the hose 15 to prevent material from leaking directly from the mating position of the first cover 1 and the hose 15. Specifically, the lower end of the first mating surface 20 inside the first cover 1 abuts against the discharge port end face of the hose 15. An annular protrusion is provided at the lower end of the first mating surface 20, and an annular groove is provided at the discharge port 16 end face of the hose 15. The annular protrusion and the annular groove cooperate to achieve the sealing effect of the discharge port 16 of the hose 15, thereby improving the quantitative discharge effect.

[0032] It should also be noted that, in order to prevent the disc 3 from falling into the outlet 16 of the hose 15, a limiting protrusion 26 is provided on the first mating surface 20 of the first cover 1. The inner diameter of the first mating surface 20 is adapted to the radial dimension of the disc 3. The limiting protrusion 26 is located on the side of the first mating surface 20 near the outlet 16, and the limiting protrusion 26 can support the disc 3 to prevent the disc 3 from falling into the hose 15 due to the weight of the connector 2 and the elastic force of the elastic element 10. In addition, the radial dimension of the disc 3 is also larger than the size of the outlet 16 of the hose 15.

[0033] Example 2: As Figures 1 to 5 The illustrated quantitative dispensing hose includes a hose 15, a first cover 1, and a dispensing assembly located within the first cover 1. The upper part of the hose 15 is a dispensing port 16. The first cover 1 is cylindrical and can be fitted and engaged with the dispensing port 16 on the hose 15 while ensuring a sealing effect. The dispensing assembly includes a connector 2 and a disc 3, which rotate relative to each other. A first mating surface 20 is provided on the inner side of the first cover 1 to mate with the connector 2, while a second mating surface 21 on the connector 2 rotates with the first mating surface 20. Specifically, as shown... Figure 2 or Figure 4 as well as Figure 5 As shown, a spiral groove 22 is provided on the first mating surface 20 of the first cover 1, and a slider 23 adapted to the spiral groove 22 is provided on the second mating surface 21 of the connector 2. When the connector 2 rotates relative to the first cover 1, under the action of the slider 23 and the spiral groove 22, the connector 2 not only rotates, but also moves and rises along the axial direction of the first cover 1, thereby compressing the space between the connector 2 and the first cover 1. Two symmetrically arranged notches 19 are provided on the second mating surface 21. When the first mating surface 20 and the second mating surface 21 rotate relative to each other, the rotational friction between the connector 2 and the first cover 1 can be reduced to ensure good material discharge effect.

[0034] An upper sealing wall 8 is provided inside the first cover 1, and a lower sealing wall 7 is provided on the connector 2. Similarly, both the upper sealing wall 8 and the lower sealing wall 7 are cylindrical sidewalls. The upper sealing wall 8 and the lower sealing wall 7 are fitted together internally and externally, thereby forming a sealed cavity 4 inside. When the connector 2 moves axially inside the first cover 1, the upper sealing wall 8 and the lower sealing wall 7 will move closer or further apart axially, thereby changing the size of the sealed cavity 4.

[0035] A disc 3 is located on the side of connector 2 away from the first cover 1, that is, at the bottom of connector 2. Disc 3 is rotatably connected to the bottom of connector 2. Specifically, a pivot 9 is provided on connector 2, located at the center of connector 2. The bottom of pivot 9 is a hollow column 11, and a protruding column 12 is provided above disc 3. The protruding column 12 and the hollow column 11 cooperate to connect connector 2 and disc 3 together. It should be noted that a groove 24 is provided inside the hollow column 11, and a rotating ring 25 is provided on the protruding column 12. The rotating ring 25 is fitted inside the groove 24, thus ensuring that the protruding column 12 and the hollow column 11 do not detach, and also ensuring relative rotation between the protruding column 12 and the hollow column 11, that is, ensuring the rotational effect between connector 2 and disc 3.

[0036] A first through hole 5 is provided on the connector 2, and a second through hole 6 is provided on the disc 3. The distance between the second through hole 6 and the first through hole 5 and the center of the rotating shaft 9 is the same, that is, the radial positions of the second through hole 6 and the first through hole 5 are the same. After the connector 2 and the disc 3 rotate relative to each other, the first through hole 6 and the second through hole 5 can be made to coincide. In addition, the circumferential diameter of the second through hole 6 is larger than that of the first through hole 5. Specifically, the first through hole 5 is a circular hole, while the second through hole 6 is a fan-shaped hole, which can maximize the output of the first through hole 5 and the second through hole 6. In the initial state, the positions of the first through hole 5 and the second through hole 6 are offset from each other. Only when the discharge assembly rotates inside the first cover 1 will the first through hole 5 and the second through hole 6 be aligned and connected to achieve discharge. Specifically, the disc 3 is positioned at the outlet 16 of the hose 15. The second through hole 6 on the disc 3 is flush with the bottom of the connector 2. When the user presses the hose 15, the internal pressure of the hose 15 increases, and the material pushes the bottom of the disc 3. Consequently, the disc 3 pushes the connector 2 to move axially along the first cover 1. At the same time, the connector 2 rotates relative to the first cover 1 and the disc 3 until the first through hole 5 on the connector 2 and the second through hole 6 on the disc 3 are aligned. Only then will the axial movement of the connector 2 and the disc 3 inside the first cover 1 stop. Under the pressure inside the hose 15, the material enters the sealed cavity 4 through the first through hole 5 and the second through hole 6.

[0037] The first through hole 5 is a cylindrical axial elongated hole. One end of the first through hole 5 is integrally connected to the bottom of the connector 2, and the other end of the first through hole 5 is flush with the upper end face of the lower sealing wall 7. The first through hole 5 connects the inner surface of the lower sealing wall 7 and the outer side wall of the rotating shaft 9, which improves the structural strength of the connector 2 and ensures the stability of the sealing cavity 4. In addition, during the discharge process, a certain amount of material is also filled into the cylindrical elongated hole (first through hole 5), which can act as a seal to prevent the gas in the sealing cavity 4 from flowing back into the hose 15, causing a change in the vacuum degree (or pressure difference), thus making it impossible to guarantee that the discharge is the same each time.

[0038] It should be noted that a discharge hole 13 is also provided on the first cover 1. The discharge hole 13 protrudes slightly from the upper outer surface of the first cover 1. A one-way valve 14 is provided inside the discharge hole 13. The conduction path of the one-way valve 14 is open from the inside of the first cover 1 to the outside of the first cover 1, but closed from the outside of the first cover 1 to the inside of the first cover 1. When the discharge assembly undergoes axial displacement relative to the inside of the first cover 1 and is lifted (lifting is relative to the inside of the first cover 1), Figure 2 When the orientation shown is such that the volume of the sealed cavity 4 between the connector 2 and the first cover 1 decreases, the internal pressure increases, thereby opening the one-way valve 14 to perform an exhaust operation. When the pressure inside the sealed cavity 4 is the same as the external pressure, the one-way valve 14 is in the closed state. When the discharge component undergoes axial displacement relative to the inside of the first cover 1 or has a tendency to fall back (falling back is relative to the inside of the first cover 1), the discharge component will be discharged. Figure 2 When the orientation shown is such that a negative pressure is formed in the sealed cavity 5, it will prevent the discharge component from falling back and maintain the state of the discharge component at this time.

[0039] An elastic element 10 is also provided between the first cover 1 and the connector 2. Specifically, the elastic element 10 is a spring structure, with one end connected to the rotating shaft 9 in the middle of the connector 2 and the other end abutting against the inner surface of the first cover 1. When the discharge assembly undergoes axial displacement relative to the first cover 1, the elastic element 10 will enter a potential energy storage or potential energy release state. This can improve the movement stability of the discharge assembly on the one hand, and ensure that the discharge assembly returns to its initial state on the other hand, ensuring that the discharge amount is the same each time.

[0040] The specific working principle of this scheme is as follows. Initially, the first through hole 5 and the second through hole 6 are offset. First, the user squeezes the hose 15, increasing the internal pressure. This causes the material inside the hose 15 to exert pressure on the disc 3 at the outlet 16 of the hose 15, thus causing the disc 3 to push against the bottom of the connector 2. That is, the disc 3 and connector 2 tend to axially lift relative to the first cover 1. Under the action of the spiral groove 22 on the first cover 1 and the slider 23 on the connector 2, the connector 2 will axially lift relative to the first cover 1 while also rotating relative to the first cover 1 and the disc 3. The second mating surface 21 on the connector 2 and the first mating surface 20 on the first cover 1 approach each other. The volume of the sealed cavity 4 formed by the first mating surface 20 and the second mating surface 21 gradually decreases, and the pressure inside the sealed cavity 4 gradually increases. When the pressure inside the sealed cavity 4 is greater than the external pressure, the first cover 1... The one-way valve 14 is opened, allowing the gas in the sealed cavity 4 to be discharged from the discharge hole 13 on the first cover 1 until the first through hole 5 on the connector 2 rotates to the position aligned with the second through hole 6 on the disc 3. At this point, the material in the hose 15 no longer pushes the disc 3 and the connector 2 to move. Under the action of the one-way valve 14, the pressure in the sealed cavity 4 will quickly reach a state of equilibrium with the external air pressure (including the threshold pressure of the one-way valve 14), thus the one-way valve 14 closes and no longer performs venting operation (or venting is reduced). At this point, the user can release the hose 15 and stop pressing it. Under the action of the elastic element 10, the connector 2 and the disc 3 have a tendency to fall back, causing a negative pressure to be formed in the sealed cavity 4. Under the action of the negative pressure in the sealed cavity 4, the material in the hose 15 will enter the sealed cavity 4 formed between the connector 2 and the first cover 1 through the first through hole 5 and the second through hole 6 to compensate for the negative pressure effect in the sealed cavity 4. When the pressure inside the sealed cavity 4 is the same as the pressure inside the hose 15, the material inside the hose 15 has fully filled the space occupied by the extruded gas. The material inside the hose 15 will no longer enter the sealed cavity 4 through the first through hole 5 and the second through hole 6, and under the action of the elastic element 10, the connector 2 and the disc 3 will fall back to their initial positions. This completes the first pressing and feeding operation.

[0041] Since the displacement of connector 2 and disc 3 inside the first cover 1 remains constant, the amount of material fed by each press is the same. By repeatedly pressing the hose 15, the effect of quantitative material discharge can be achieved.

[0042] This solution also includes a second cover 17, which is used to enclose the upper surface of the first cover 1 to prevent the exterior of the first cover 1 from being contaminated. The inner surface of the second cover 17 is provided with a snap groove 18 that is adapted to the discharge hole 13. The snap groove 18 in the second cover 17 and the discharge hole 13 cooperate to form a fixed connection.

[0043] It should be noted that a sealing treatment is also adopted between the first cover 1 and the hose 15 to prevent material from leaking directly from the mating position of the first cover 1 and the hose 15. Specifically, the lower end of the first mating surface 20 inside the first cover 1 abuts against the discharge port end face of the hose 15. An annular protrusion is provided at the lower end of the first mating surface 20, and an annular groove is provided at the discharge port 16 end face of the hose 15. The annular protrusion and the annular groove cooperate to achieve the sealing effect of the discharge port 16 of the hose 15, thereby improving the quantitative discharge effect.

[0044] It should also be noted that, in order to prevent the disc 3 from falling into the outlet 16 of the hose 15, a limiting protrusion 26 is provided on the first mating surface 20 of the first cover 1. The inner diameter of the first mating surface 20 is adapted to the radial dimension of the disc 3. The limiting protrusion 26 is located on the side of the first mating surface 20 near the outlet 16, and the limiting protrusion 26 can support the disc 3 to prevent the disc 3 from falling into the hose 15 due to the weight of the connector 2 and the elastic force of the elastic element 10. In addition, the radial dimension of the disc 3 is also larger than the size of the outlet 16 of the hose 15.

Claims

1. A metering discharge hose, characterized in that, The device includes a first cover and a discharge assembly located within the first cover. The discharge assembly includes a connector and a disc. The discharge assembly and the first cover form a sealed cavity. The connector rotates relative to the disc and is spirally connected to the first cover, allowing the connector to be displaced along the axial direction of the first cover. The connector has a first through hole, and the disc has a second through hole. In the initial state, the first through hole and the second through hole are offset from each other. Only when the discharge component rotates inside the first cover will the first through hole and the second through hole be aligned and connected to achieve discharge. The discharge assembly is provided with a rotating shaft, which is located inside the sealed cavity, and an elastic element is provided between the rotating shaft and the first cover.

2. The quantitative discharge hose according to claim 1, characterized in that, The connector is provided with a lower sealing wall, and the first cover is provided with an upper sealing wall. The lower sealing wall and the upper sealing wall cooperate to form the sealing cavity, and the first through hole is located in the sealing cavity.

3. The quantitative discharge hose according to claim 1, characterized in that, The elastic element is a spring structure. One end of the elastic element is connected to the pivot part in the middle of the connector, and the other end abuts against the inner surface of the first cover.

4. A quantitative discharge hose according to claim 3, characterized in that, The rotating shaft is a hollow column on the side near the disc, and the disc has protrusions that rotate in conjunction with the hollow column.

5. A quantitative discharge hose according to claim 1, characterized in that, The first cover is provided with a discharge hole, and a one-way valve is provided in the discharge hole.

6. A metering discharge hose according to any one of claims 1 to 5, characterized in that, It also includes a hose, which has a discharge port that is sealed to the first cover and abuts against the discharge assembly.

7. A quantitative discharge hose according to claim 3, characterized in that, The radial position of the second through hole corresponds to the radial position of the first through hole, and the circumferential dimension of the second through hole is greater than the circumferential dimension of the first through hole.

8. A quantitative discharge hose according to claim 2, characterized in that, The first through hole is a columnar elongated hole, and the first through hole is integrally formed with the lower sealing wall.

9. A metering discharge hose according to any one of claims 1 to 5, characterized in that, It also includes a second cover, which is disposed on the first cover. The first cover has a fastening groove that engages with the discharge hole.

10. A metering discharge hose according to claim 1, characterized in that, The connector has a notch on its mating surface with the first cover.

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