Paste outlet valve assembly and paste pump container

Abstract

The invention relates to a paste outlet valve assembly and a paste pump container, the paste outlet valve assembly comprises an elastic valve body, the elastic valve body is provided with a closed paste outlet end, an open joint end and a neck connecting the paste outlet end and the joint end; the center of the ointment outlet end is provided with a notch which can be opened by the pressure of the ointment; a flow guide surface is formed on the inner side wall of the neck part, and the flow guide surface is gradually expanded from the position close to the toothpaste outlet end to the position close to the joint end. The paste extrusion device has the advantage that paste extrusion can be more uniform and more labor-saving.

Description

Technical Field

[0001] The present application relates to the field of paste pumps, and in particular to a paste discharge valve assembly and a paste pump container. Background Art

[0002] Due to their unique physical properties, semi-solid or viscous contents such as ointments, lotions, and gels are often stored in specialized packaging containers that allow for quantitative extrusion and prevent contamination. Among these, containers with one-way discharge valves are the most widely used, and they can be primarily categorized into press-type and extrusion-type structures.

[0003] Push-type containers dispense their contents through a sophisticated pumping mechanism. They typically consist of a rigid container body, a pumping mechanism (including a piston, pump chamber, spring, etc.), and a push-button. When the user presses the push-button, the piston moves downward within the pump chamber, pressurizing the paste and forcing it out through a valve at the end. When the piston is released, the spring resets the piston, creating negative pressure within the pump chamber that replenishes the paste from the container body, preparing for the next press. Squeeze-type containers have a simpler structure, typically consisting of a flexible, elastically deformable bottle or tube. The user directly squeezes the bottle, reducing its internal volume and applying pressure to the paste, forcing it out through the valve.

[0004] Despite the different driving principles, the common purpose of both containers is to enable convenient access to the ointment and to isolate the outside air and contaminants through a key component, the "ointment valve", to ensure the quality and hygiene of the contents. Existing ointment valves are usually made of materials with good elasticity, such as silicone and thermoplastic elastomers, and are typically designed as an integrated flexible diaphragm structure. In the center of the diaphragm, there is one or more incisions that remain closed in the natural state by relying on the elastic recovery force of the material itself, of which the cross-shaped incision is the most common. When the pressure of the internal ointment (whether from the pumping mechanism or the bottle squeeze) accumulates to a level sufficient to overcome the closing force of the incision, the incision is stretched open and the ointment is allowed to pass through; when the pressure disappears, the incision quickly rebounds and closes, blocking the outlet channel.

[0005] However, in the prior art, a considerable number of paste-discharging valves have design defects. In particular, a common planar design is that the inner wall of the elastic valve body that contains the paste and bears the pressure is basically a plane. In this design, in order to open the incision in the center, the paste pressure from the inside must first drive the plane of the entire central area of ​​the valve body to undergo significant bending deformation. The force transmission path is: paste pressure → overall bending of the valve sheet → the incision is pulled open. In this process, a large part of the energy is consumed in bending the valve sheet material, rather than directly acting on the opening of the incision, resulting in low force utilization efficiency. This is directly reflected in the user experience, that is, the user needs to apply a large pressing force or extrusion force to successfully squeeze out the paste. Summary of the Invention

[0006] In order to enable the ointment to be extruded more evenly and with less effort, the present application provides a ointment discharge valve assembly and a ointment pump container.

[0007] In the first aspect, the present application provides a paste dispensing valve assembly, which adopts the following technical solution: A paste discharging valve assembly, comprising: an elastic valve body having a closed paste-discharging end, an open joint end, and a neck connecting the paste-discharging end and the joint end; The center of the ointment outlet is provided with an incision which can be opened by the ointment pressure; The inner side wall of the neck is formed into a flow guiding surface, and the flow guiding surface gradually expands from a position close to the paste outlet end to a position close to the joint end.

[0008] By adopting the above technical solution, the paste dispensing valve provided in this application achieves significant optimization in terms of mechanics and fluid dynamics by virtue of its core guide surface structure. Its working principle is as follows: In a traditional flat valve body, the pressurized paste exerts pressure on a flat inner surface, generating a force that is completely parallel to the direction of the paste's extrusion. To open the central cutout, this force must first drive a significant bending deformation of the entire plane of the valve body's central region. Only when the deformation is large enough will the edges of the cutout be passively pulled apart. This is clearly an indirect and inefficient method of opening, as most of the energy is consumed in bending the valve body material rather than directly acting on the "opening" action.

[0009] In this design, the inner wall of the elastic valve body is designed as a gradually expanding flow-guiding surface. When the paste pressure acts on this inclined flow-guiding surface, the force generated is no longer simply axial. According to mechanical principles, this force can be understood as generating two components simultaneously: an axial force along the direction of paste extrusion, similar to the traditional design, causing the valve body to bend; and more importantly, a radial force is simultaneously generated, extending from the inside outward along the radius.

[0010] This newly generated radial force is the core of this solution. It acts directly on the lip of the central cutout, creating an efficient outward "expansion" or "opening" tendency, like a wedge directly stretching a closed gap. Compared to relying on overall bending for indirect opening, this radial force acts more directly and efficiently. In addition, the guide surface can smoothly collect the paste and guide it to the central cutout, reducing energy loss while also concentrating the pressure more precisely on the cutout area where deformation is most needed. The synergistic effect of these two mechanisms significantly reduces the overall pressure required to open the valve.

[0011] Optionally, the incision includes a plurality of grooves extending outward from the center.

[0012] Optionally, the number of the cut grooves is 4 to 8, and the cut grooves extend outward from the middle of the paste outlet end and are evenly arranged around the center of the paste outlet end.

[0013] Optionally, the paste outlet end is an outwardly convex arc surface, and there is an arc transition between the paste outlet end and the neck.

[0014] By adopting the above technical solutions, the external geometry of the valve body is optimized to improve stress distribution and rebound performance. The arc transition between the paste outlet and the neck is a classic design to eliminate stress concentration. It avoids the stress concentration points caused by sudden changes in shape at the corners of the structure, thereby preventing fatigue tearing from this weak link during the high-frequency deformation process of repeated opening and closing of the valve body. At the same time, the convex arc surface structure of the paste outlet itself can make the internal stress distribution of the material more uniform when it is compressed and deformed, compared to a flat surface. In addition, its dome-shaped geometry can provide a clearer and more powerful elastic recovery guide, enabling the incision to rebound to its initial closed state more quickly and reliably after the internal pressure is released.

[0015] Optionally, the outer side wall of the neck is adapted to fit with the inner side wall of the cream discharge cap of the cream pump container.

[0016] By employing this technical solution, the close fit between the two forms a reliable circumferential seal around the outer perimeter of the valve body. This seal effectively prevents the paste that has passed through the valve cutout from leaking outward along the installation gap; it also prevents external contaminants such as moisture and dust from entering the mating structure between the cover and the valve body. Furthermore, the inner wall of the cover provides precise radial support and guidance for the relatively flexible valve neck. This ensures the coaxiality of the elastic valve body after installation within the cover, ensuring stable alignment of the central cutout with the paste outlet hole in the cover.

[0017] Optionally, a flange is extended from the periphery of the joint end of the elastic valve body; the paste outlet valve also includes a fixing ring, which is provided with a first groove for accommodating and fixing the flange, and a first through hole is formed on the fixing ring for the paste to pass through.

[0018] By adopting this technical solution, the flange at the joint end of the elastic valve body engages with the first groove of the retaining ring, forming a reliable axial locking structure and root sealing structure. The axial locking effectively prevents the valve body from shifting or dislodging from the base under the high-pressure impact of the internal paste; the root sealing eliminates the possibility of the paste bypassing and leaking from the bottom of the valve body. Furthermore, the rigid retaining ring provides a stable support base for the relatively flexible valve body, ensuring its secure installation base. The through-hole in the retaining ring is the necessary channel for the paste to flow from the pump body to the back of the valve body.

[0019] Optionally, the fixing ring is formed with an inner convex edge at the periphery of the through hole, and the inner convex edge and the side wall of the first groove jointly define an embedding groove for engaging with the flange.

[0020] Optionally, the inner side wall of the neck is gradually bent outward from the paste outlet end to the joint end until it meets a plane formed with the flange at the joint end.

[0021] By adopting the above technical solution, the smooth arc profile of the inner wall that gradually bends outward can more effectively guide the viscous paste to produce a smooth, undisturbed laminar flow compared to a simple straight cone surface, thereby minimizing energy loss and paste discharge resistance during the flow process.

[0022] In terms of structural strength, the smooth, seamless connection between the curved contour and the bottom flange completely eliminates the internal sharp corners that can occur in traditional structures. These sharp corners not only cause fluid turbulence but also serve as stress concentration points in the structure. This design's smooth transition allows stress to be gently dispersed from the flexible neck to the more rigid flange during repeated opening and closing of the valve body, thus avoiding the risk of fatigue tearing at the base of the valve body due to stress concentration.

[0023] Optionally, a positioning protrusion is formed on the side wall of the first groove, and a positioning recess that matches the positioning protrusion is formed on the flange.

[0024] Optionally, the elastic valve body is made of silicone rubber or thermoplastic elastomer.

[0025] Optionally, a plurality of support ribs spanning the first through hole are further formed on the fixing ring.

[0026] Optionally, the support rib is in a cross shape or an asterisk shape in a cross section perpendicular to the axial direction of the fixing ring; Optionally, the support ribs extend into a plate shape in the axial direction of the fixing ring.

[0027] Optionally, the cutting groove divides the paste outlet end into a plurality of deformable and flippable valves.

[0028] Optionally, the valve is closed in a static state and forms a closed structure.

[0029] Optionally, the valve opens under the action of internal pressure and forms a star-shaped opening.

[0030] Optionally, the valve is a flippable three-dimensional elastic sheet structure surrounded by grooves.

[0031] Optionally, the incision includes two grooves that are arranged perpendicular to each other and intersect at the center of the paste outlet end to form a cross-shaped structure, and the two grooves divide the paste outlet end into four valve units; the middle area of ​​the valve unit on the side away from the intersection center of the grooves and the adjacent neck part are recessed toward the inside of the neck, so that the two sides of the recessed part form triangular arc surface segments.

[0032] In a second aspect, the present application provides a cream dispensing cap for a cream pump container, which adopts the following technical solution: A paste discharging cover for a paste pump container comprises the paste discharging valve assembly for the paste pump container as described above, and also comprises a cover body, wherein a second through hole for exposing the paste discharging end is provided on the top of the cover body.

[0033] Optionally, a snap-fitting ridge is circumferentially provided on the inner side wall of the cover body, and the snap-fitting ridge is suitable for snapping with the outer side wall of the fixing ring of the paste outlet valve assembly to fix the paste outlet valve assembly in the cover body.

[0034] In a third aspect, the present application provides an ointment pump container, which adopts the following technical solution: A paste pump container includes the paste discharge cap for the paste pump container as described above, and also includes a bottle body and a pneumatic movable part. The paste discharge cap for the paste pump container is detachably mounted on the top of the bottle body, and the pneumatic movable part is mounted inside the bottle body and slidably cooperates with the inner wall of the bottle body. The bottle body, the paste discharge cap and the pneumatic movable part cooperate to form an inner cavity for accommodating paste.

[0035] In summary, this application includes at least one of the following beneficial technical effects: 1. By providing a gradually expanding guide surface on the inner wall of the elastic valve body, the axial pressure of the paste is effectively decomposed, generating a radial opening force that acts directly on the incision, significantly lowering the valve's opening threshold. Whether pressing or squeezing, the user only needs to apply less force to smoothly squeeze out the paste, which feels more effortless and easy, greatly improving the user experience. At the same time, the guide surface also guides the paste to flow smoothly, making the dispensing process more stable.

[0036] 2. The use of arc transitions on the inner and outer surfaces of the valve body and at the structural joints effectively eliminates stress concentration points, making the valve body less susceptible to fatigue tearing during repeated opening and closing. This significantly improves the product's durability and service life, ensuring that the cutouts rebound more quickly and reliably after pressure is released. Furthermore, the multiple seals between the valve body, cover, and retaining ring effectively enhance overall sealing, preventing leakage of contents and external contamination.

[0037] 3. The product of the present application is similar to a cap-shaped or nipple-shaped structure. Compared with the traditional flat or bullet-shaped flexible valve body, its shape is more convenient for stable clamping and positioning in automated or manual operations. More importantly, by pre-combining the flexible elastic valve body and the rigid fixing ring into an independent modular component, the final assembly process is greatly simplified. During operation, the rigid fixing ring can be directly operated (such as clamping its support ribs) to accurately install the entire assembly into the paste outlet cap at one time and clamp it in place, effectively avoiding damage or improper assembly that may be caused by direct operation and squeezing of the flexible valve body, thereby significantly improving production efficiency and reducing the defective rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1a FIG1 is a first structural diagram of a paste discharge valve for a paste pump container according to a first embodiment of the present invention.

[0039] Figure 1b FIG2 is a second structural diagram of the paste discharge valve for the paste pump container according to the first embodiment of the present invention.

[0040] Figure 2a FIG1 is a first structural diagram of a paste discharge valve for a paste pump container according to a second embodiment of the present invention.

[0041] Figure 2b FIG2 is a second structural diagram of a paste discharge valve for a paste pump container according to a second embodiment of the present invention.

[0042] Figure 3a FIG1 is a first structural diagram of a paste discharge valve for a paste pump container according to a third embodiment of the present invention.

[0043] Figure 3b FIG2 is a second structural diagram of a paste discharge valve for a paste pump container according to a third embodiment of the present invention.

[0044] Figure 4 Schematic diagrams of the structures of the fixing rings in the first and second embodiments of the present invention are shown.

[0045] Figure 5a FIG1 is a first structural diagram of a fixing ring according to a third embodiment of the present invention.

[0046] Figure 5b FIG2 is a second structural diagram of a fixing ring according to a third embodiment of the present invention.

[0047] Figure 5c A schematic structural diagram of a fixing ring and a paste discharging valve in a third embodiment of the present invention is shown.

[0048] Figure 5d Draws Figure 5c sectional view of .

[0049] Figure 6aFIG1 is a first structural diagram of a paste discharge cap for a paste pump container according to an embodiment of the present invention.

[0050] Figure 6b FIG2 is a second structural diagram of a paste discharge cap for a paste pump container according to an embodiment of the present invention.

[0051] Figure 7 A schematic structural diagram of a paste pump container according to an embodiment of the present invention is shown.

[0052] Figure 8 A cross-sectional view of a paste pump container according to an embodiment of the present invention is shown.

[0053] Description of reference numerals: 1. Paste discharge valve assembly; 2. Elastic valve body; 3. Paste discharge end; 4. Joint end; 5. Neck; 6. Incision; 7. Groove; 8. Guide surface; 9. Flange; 10. Annular ridge; 11. Positioning depression; 12. Fixing ring; 13. First through hole; 14. First groove; 15. Inner convex edge; 16. Embedded groove; 17. Positioning protrusion; 18. Support rib; 19. Cover body; 21. Second through hole; 22. Snap-fit ​​ridge; 23. Bottle body; 24. Pneumatic movable part; 25. Valve. DETAILED DESCRIPTION

[0054] The present application will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application.

[0055] In the following description, for the purpose of explanation, many specific details are set forth in order to provide a thorough understanding of the inventive concepts. Some of the figures in the drawings of the present disclosure, which are part of this specification, represent structures and devices in block diagram form to avoid making the disclosed principles complicated and obscure. For the sake of clarity, not all features of an actual implementation are necessarily described. In addition, the language used in this disclosure has been selected primarily for readability and instructional purposes and may not have been selected to delineate or limit the subject matter of the invention, thereby resorting to the necessary claims to determine such inventive subject matter. References in this disclosure to "one embodiment" or "an embodiment" mean that the specific features, structures or characteristics described in conjunction with that embodiment are included in at least one embodiment, and multiple references to "one embodiment" or "an embodiment" should not be understood to necessarily all refer to the same embodiment.

[0056] Unless expressly limited, the terms "a", "an" and "the" are not intended to refer to a singular entity, but rather to include a general class of which a specific example may be used for illustration. Thus, the use of the term "a" or "an" may mean any number of at least one, including "one", "one or more", "at least one", and "one or more than one". The term "or" means any of the alternatives and any combination of the alternatives, including all, unless the alternatives are expressly indicated to be mutually exclusive. The phrase "at least one of" when combined with a list of items refers to a single item in the list or any combination of the items in the list. The phrase does not require all of the listed items unless expressly limited to that.

[0057] The present application embodiment discloses a paste dispensing valve assembly, referring to Figure 1a and Figure 1b The paste discharging valve assembly 1 includes an elastic valve body 2. The elastic valve body 2 has a closed paste discharging end 3, an open joint end 4, and a neck 5 connecting the paste discharging end 3 and the joint end 4.

[0058] The elastic valve body 2 is a one-piece structure, comprising a closed dispensing end 3, an open coupling end 4, and a neck 5 connecting the dispensing end 3 and the coupling end 4. The dispensing end 3 is used to open and dispense the paste under the action of internal paste pressure, while the coupling end 4 is used to connect the entire elastic valve body 2 to the other components of the paste pump container to form a complete dispensing channel. The neck 5 serves as a connecting portion. During operation, the paste from the paste pump container enters the elastic valve body 2 through the open coupling end 4. Pressure accumulates within the cavity defined by the neck 5, ultimately pushing the closed dispensing end 3 open, thereby extruding the paste.

[0059] Specifically, an incision 6 that can be opened by the pressure of the paste is provided in the center of the paste outlet end 3. The incision 6 is composed of a plurality of grooves 7 extending from the center point to the periphery. These grooves 7 fit together in a natural state to keep the paste outlet end 3 closed. In different embodiments, the number of grooves 7 can be four to eight, and they are evenly arranged around the center point of the incision 6 to ensure that the paste can flow out evenly. In a preferred embodiment, the grooves 7 are four, which together form a cross-shaped incision 6. In another preferred embodiment, the grooves 7 are six, which together form an asterisk-shaped cross-shaped incision 6, that is, in the shape of an "*".

[0060] The structure of the incision 6 utilizes the elastic recovery characteristics of the elastic valve body 2 material itself. When the internal paste pressure increases and acts on the incision 6, the cut valve body part will be pushed outward to form an outlet channel for the paste. Once the internal pressure disappears, the elastic recovery force of the material will immediately cause the stretched parts to reset, so that the incision 6 is reclosed. This automatic opening and closing mechanism not only realizes on-demand distribution, but more importantly, it forms a reliable barrier, effectively preventing external air, dust or microorganisms and other pollutants from flowing back through the paste outlet channel between two uses, thereby contaminating the unused paste inside the container. In addition, this neat closing method also helps to cleanly cut off the paste after each extrusion, avoiding outlet residue or dripping.

[0061] In the first preferred embodiment, the outer surface of the paste outlet 3 is not a flat surface, but rather a smooth, outwardly convex arc. Furthermore, the outer periphery of the paste outlet 3 and the outer wall of the neck 5 are connected by a smooth, arc-shaped transition zone, rather than a sharp corner. This outwardly convex arc can be designed as a portion of a regular sphere, or as an aspherical parabola or ellipsoid, as needed. The radius of this arc transition can also be set based on the material's elasticity and stress distribution requirements to achieve an optimized transition effect.

[0062] This smooth transition between the curved surface and the circular arc avoids stress concentration caused by sharp corners during the repeated deformation of the valve body during opening and closing under pressure. It especially prevents stress from concentrating at the end of the slot 7 and causing tearing, thereby greatly improving the fatigue resistance and service life of the elastic valve body 2. Secondly, the dome-shaped geometry of the convex curved surface helps guide the release of elastic potential energy, allowing the slot 6 to rebound and close more quickly and forcefully after the internal pressure disappears, further enhancing the sealing reliability of the slot 6.

[0063] In a second preferred embodiment, referring to Figure 2a and Figure 2b The groove 7 divides the paste outlet end 3 into several deformable and flippable valves 25. The valves 25 are naturally closed to form a sealing structure when not under pressure. During the pressing process of the paste pump, when an upward positive pressure is formed inside, the valves 25 flip outward and open to form an opening hole similar to a polygonal star, allowing the paste to flow out of the groove 7.

[0064] For example, the incision 6 comprises two perpendicular grooves 7 that intersect at the center of the paste outlet 3 to form a cross-shaped structure. The two grooves 7 divide the paste outlet 3 into four valve units 25. The central region of each valve unit 25, located away from the intersection of the grooves 7, and the adjacent portion of the neck 5, are recessed toward the interior of the neck 5, forming triangular arc segments on both sides of the recessed portion. The valves 25 deform under pressure and return to their initial closed state due to the elasticity of the material when the pressure is released. This structure ensures a tight seal at the outlet when the paste pump is not in operation, preventing air or impurities from entering the container. At the same time, it responds promptly to pump pressure, improving paste dispensing efficiency and cleanliness. Furthermore, in various embodiments of the present application, the inner sidewall of the neck 5 is formed as a guide surface 8, rather than a cylindrical surface. The inner diameter of the guide surface 8 gradually expands from the position near the paste outlet 3 to the position near the joint end 4, forming a funnel-shaped internal passage. In different embodiments, the contour of the guide surface 8 can have various forms. For example, it can be a linearly expanding conical surface with a constant slope; or it can be a nonlinear arc surface with a concave curvature, and the curve profile of the arc surface can be a circular arc, a parabola or other curves that can achieve a smooth transition.

[0065] This inclined guide surface 8 changes the way the internal paste pressure acts on the valve body. When the paste pressure acts on this inclined guide surface 8, the force generated is no longer a single axial force parallel to the paste discharge direction. This force can be understood as simultaneously generating two components: an axial component along the paste discharge direction, which acts to bend the entire valve body structure upward; and more importantly, a radial component is simultaneously generated, pointing outward along the radius.

[0066] This radial component of force acts directly on the root of the central incision 6 and its surrounding area, producing an efficient outward expansion effect similar to the insertion of a wedge, actively stretching the closed incision 6 outward. Compared with the traditional design that simply relies on axial force to bend the valve body and thus passively pull open the incision 6, the opening efficiency of this radial force is much higher. In addition, from the perspective of fluid dynamics, the funnel-shaped guide surface 8 can also smoothly guide and collect viscous pastes, reduce energy loss when the paste hits the inner wall, and more effectively concentrate the pressure on the most critical area of ​​the incision 6. The synergistic effect of these two mechanisms significantly reduces the overall pressure required to open the valve.

[0067] It should be noted that, regarding the matching relationship between the elastic valve body 2 and the external components, different designs may be adopted in different application scenarios. In one embodiment, the outer wall of the neck 5 fits tightly with the inner wall of the paste discharge cap of the paste pump container that contains it. This design can form a reliable circumferential seal, which not only prevents the paste from leaking out, but also eliminates the invasion of external contaminants. At the same time, the inner wall of the paste discharge cap also provides a stable radial support for the neck 5, ensuring the accuracy and stability of the installation of the elastic valve body 2. In another embodiment, a certain gap may be retained between the outer wall of the neck 5 and the inner wall of the paste discharge cap, so that only part of the paste discharge end 3 and the joint end 4 are in contact with the paste discharge cap for positioning. This design can reduce friction during installation and provide the neck 5 with more freedom of movement when it is deformed under pressure.

[0068] To achieve the aforementioned elastic opening and closing and sealing functions, the materials used for the elastic valve body 2 may vary in different embodiments. They must ensure excellent elastic recovery properties to ensure that the incision 6 can be fully closed after pressure is released; possess good biocompatibility and be non-toxic and odorless to meet the requirements of direct contact with the ointment contents, typically using food-grade or medical-grade materials; and possess excellent chemical stability and antioxidant properties to prevent reactions with the ointment or aging. For example, in specific embodiments, the elastic valve body 2 may be made of materials such as silicone rubber or thermoplastic elastomer.

[0069] In a preferred embodiment, reference Figure 3a and Figure 3b The outer periphery of the joint end 4 of the elastic valve body 2 extends radially and is integrally formed with an annular flange 9 . The flange 9 extends toward the paste outlet end 3 and forms a gap with the neck 5 .

[0070] In another preferred embodiment, in order to further enhance the reliability and structural stability of the paste valve assembly 1, the paste valve assembly 1 is designed as a modular assembly consisting of flexible components and rigid components. Specifically, the outer periphery of the joint end 4 of the elastic valve body 2 extends radially and is integrally formed with an annular flange 9. In conjunction with the elastic valve body 2, Figure 4 The paste valve assembly 1 further includes a rigid fixing ring 12. A first through hole 13 for the paste to pass through is formed in the center of the fixing ring 12, and a first annular groove 14 is correspondingly formed on the surface surrounding the first through hole 13 to accommodate and fix the flange 9. During assembly, the flange 9 of the elastic valve body 2 is embedded in the first groove 14 of the fixing ring 12, and the two are tightly fitted.

[0071] To achieve a more secure lock, in one embodiment, the retaining ring 12 may have an annular inner ridge 15 extending upward from the periphery of the first through-hole 13. This inner ridge 15 and the outer sidewall of the first recess 14 together define an inwardly recessed insertion groove 16. The flange 9 of the elastic valve body 2 also has a corresponding inwardly facing annular ridge 10. During installation, the relatively soft annular ridge 10 undergoes slight elastic deformation under pressure, pushing past the inner ridge 15 before returning to its original shape within the insertion groove 16. This securely locks the flange 9 within the insertion groove 16, forming a snap-fit ​​structure.

[0072] In addition, the outwardly expanding arc of the inner side wall of the neck 5 , namely the guide surface 8 , transitions smoothly upon reaching the joint end 4 and eventually becomes tangent to the bottom plane where the flange 9 is formed.

[0073] In order to ensure that the elastic valve body 2 and the fixing ring 12 have a determined circumferential position relationship after assembly and prevent relative rotation between the two, a corresponding positioning structure can also be provided. In a specific embodiment, a plurality of positioning protrusions 17 are integrally formed on the side wall of the first groove 14 of the fixing ring 12. Correspondingly, positioning recesses 11 for cooperating with these positioning protrusions 17 are also provided on the outer peripheral wall of the flange 9 of the elastic valve body 2. During installation, the flange 9 can only be fully pressed into the groove when the positioning recess 11 on the flange 9 is aligned with the positioning protrusion 17 in the first groove 14. In a preferred embodiment, four positioning protrusions 17 and four positioning recesses 11 can be provided and evenly distributed along the circumference, for example, a pair is provided every ninety degrees.

[0074] To enhance the structural strength of the retaining ring 12 and facilitate installation, the retaining ring 12 may also be provided with support ribs 18. In one embodiment, the retaining ring 12 is formed with a plurality of support ribs 18 that span the first through hole 13. These support ribs 18 divide the first through hole 13 into multiple sectors, significantly increasing the overall rigidity of the retaining ring 12 and preventing deformation during installation or use. In a preferred embodiment, two support ribs 18 are provided, intersecting at the center of the first through hole 13, forming a cross shape. This cross-shaped support rib 18 not only provides balanced structural support but also provides a stable and convenient clamping point for automated assembly equipment or manual operation, facilitating the precise installation of the entire paste valve assembly 1 into the paste cap. In another preferred embodiment, three support ribs 18 are provided, intersecting at the center of the first through hole 13, forming an asterisk-shaped cross. Furthermore, to ensure more stable paste output and more uniform flow rate variations, the support ribs 18 can extend axially along the retaining ring 12 into a plate-like shape. Reference Figure 5a-5dThree support ribs 18 are provided, and an annular recess is formed on the fixing ring 12 into which the flange 9 of the paste supply valve 2 is embedded. It should be noted that the arrangement of the plate-shaped support ribs 18 is not limited to embodiment 3. The support ribs 18 in embodiments 1 and 2 can also be adapted in the same manner. These technical features can be organically combined accordingly and are not limited to the examples and illustrations of the embodiments.

[0075] The present application also discloses a cream dispensing cap for a cream pump container, referring to Figure 6a and Figure 6b , comprising the aforementioned paste discharge valve assembly 1 for a paste pump container, and also comprising a cover 19, the top of which is provided with a second through hole 21 for exposing the paste discharge end 3. A snap-fitting ridge 22 is circumferentially provided on the inner sidewall of the cover 19, and the snap-fitting ridge 22 is adapted to snap-fit ​​with the outer sidewall of the fixing ring 12 of the paste discharge valve assembly 1 to secure the paste discharge valve assembly 1 within the cover 19.

[0076] The present application also discloses a cream pump container, referring to Figure 7 and Figure 8 The container includes any of the aforementioned cream dispensing caps ( Figure 8 The elastic valve body 2 is hidden to facilitate visualization of the internal structure. The container also includes a bottle body 23 and a pneumatically activated member 24 at the bottom of the bottle body 23. The cream dispensing cap is removably attached to the top of the bottle body 23. The connection can be threaded, snap-fit, or any other mechanism that ensures a secure seal. The bottle body 23, particularly its lower portion, is typically made of a relatively elastic material to facilitate squeezing.

[0077] The pneumatic movable member 24 acts as a follower piston, and its outer periphery slides with the inner wall of the bottle body 23 to seal the bottom of the bottle body 23. The paste is contained in a sealed cavity formed by the paste dispensing cap, the bottle body 23 and the pneumatic movable member 24.

[0078] Its operating principle is as follows: When the user squeezes the bottle body 23, it deforms, reducing the volume of the enclosed cavity within, thereby exerting pressure on the ointment. This pressure pushes on the elastic valve body 2 in the ointment dispensing cap. When the pressure reaches the opening threshold of the elastic valve body 2, the valve body cutout 6 opens, allowing the ointment to be expelled. Furthermore, this pressure acts on the pneumatic movable member 24, causing it to move downward. When the user releases the bottle body 23, the bottle body 23 returns to its original shape due to its elasticity, causing the volume of the cavity to instantly increase, creating a negative pressure. At this point, the cutout 6 of the elastic valve body 2 quickly closes due to the internal and external pressure differential. The atmospheric pressure outside the bottle body 23 pushes the pneumatic movable member 24 upward toward the bottle opening, compensating for the volume loss caused by the ointment being expelled and ensuring that the ointment inside always fills the headspace, preventing air from entering. After one or more uses, the overall position of the pneumatic movable member 24 will gradually rise as the ointment is consumed.

[0079] In the cream pump container of the present application, the aforementioned cream dispensing valve assembly 1 can achieve a better synergistic effect. Because the design of the guide surface 8 of the elastic valve body 2 greatly reduces the pressure required for opening, the user only needs to apply a small amount of force when squeezing the bottle body 23 to increase the internal pressure to the opening threshold of the cream dispensing valve assembly 1. This means that most of the squeezing force is efficiently used to squeeze out the cream, rather than wasting time on over-compressing the bottle body 23 or pushing the pneumatic movable part 24, making the cream dispensing process more sensitive and less labor-intensive.

[0080] Secondly, the physical prerequisite for the normal operation of the pneumatic movable part 24 is that when the bottle body 23 rebounds to form a negative pressure, the paste valve assembly 1 must be able to achieve instantaneous and completely reliable sealing. If the valve is not closed in time or incompletely, the negative pressure will directly suck the external air back into the bottle through the paste outlet, which will not only contaminate the paste, but also destroy the entire pneumatic follow-up system, causing the pneumatic movable part 24 to be unable to rise normally. The elastic valve body 2 of the present application, due to its optimized geometric shape and rebound performance, can achieve fast and neat closure, effectively eliminating the phenomenon of air back-absorption, thereby ensuring the reliability and hygiene of the pneumatic container for long-term use.

[0081] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

Claims

1. A paste discharging valve assembly, characterized in that: include: An elastic valve body (2), the elastic valve body (2) having a closed paste outlet end (3), an open joint end (4), and a neck (5) connecting the paste outlet end (3) and the joint end (4); The center of the ointment outlet (3) is provided with an incision (6) that can be opened by the ointment pressure; The inner side wall of the neck (5) is formed into a flow guiding surface (8), and the flow guiding surface (8) gradually expands from a position close to the paste outlet end (3) to a position close to the joint end (4).

2. The paste discharging valve assembly according to claim 1, characterized in that: The incision (6) includes a plurality of grooves (7) extending outward from the center; the number of the grooves (7) is 4 to 8, and the grooves (7) extend outward from the middle of the paste outlet end (3) and are evenly arranged around the center of the paste outlet end (3).

3. The paste discharging valve assembly according to claim 1, characterized in that: The paste outlet end (3) is an outwardly convex arc surface, and there is an arc transition between the paste outlet end (3) and the neck (5); the outer wall of the neck (5) is suitable for fitting with the inner wall of the paste outlet cover of the paste pump container.

4. The paste discharging valve assembly according to claim 1, characterized in that: The outer periphery of the joint end (4) of the elastic valve body (2) is extended to form a flange (9); the paste discharge valve (1) further comprises a fixing ring (12), the fixing ring (12) is provided with a first groove (14) for accommodating and fixing the flange (9), and the fixing ring (12) is formed with a first through hole (13) for the paste to pass through; the fixing ring (12) is formed with an inner convex edge (15) at the periphery of the through hole, and the inner convex edge (15) and the side wall of the first groove (14) jointly define an embedding groove (16) for engaging the flange (9); the inner side wall of the neck (5) gradually bends outward from the paste discharge end (3) to the joint end (4) until it is connected to a plane formed with the flange (9) at the joint end (4).

5. The paste discharging valve assembly according to claim 4, characterized in that: The fixing ring (12) is further formed with a plurality of supporting ribs (18) spanning the first through hole (13); And / or, a positioning protrusion (17) is formed on the side wall of the first groove (14), and a positioning recess (11) matching the positioning protrusion (17) is formed on the flange (9).

6. The paste discharging valve assembly according to claim 4, characterized in that: The support rib (18) is in a cross shape or an asterisk cross shape in a cross section perpendicular to the axial direction of the fixing ring (12); And / or, the support rib (18) extends into a plate shape in the axial direction of the fixing ring (12).

7. The paste discharging valve assembly according to claim 3, characterized in that: The cutting groove (7) divides the paste outlet end (3) into a plurality of deformable and flippable valves (25); the valves (25) are closed in a static state and form a closed structure; and / or, the valve (25) opens under the action of internal pressure and forms a star-shaped opening; And / or, the valve (25) is a flippable three-dimensional elastic sheet structure surrounded by the groove (7).

8. The paste discharging valve assembly according to claim 7, characterized in that: The incision (6) comprises two mutually perpendicularly arranged incision grooves (7) that intersect at the center of the paste outlet end (3) to form a cross-shaped structure, and the two incision grooves (7) divide the paste outlet end (3) into four valve (25) units; the middle area of ​​the valve (25) unit on the side away from the intersection center of the incision grooves (7) and the adjacent neck (5) part are recessed toward the inside of the neck (5), so that the two sides of the formed recessed portion form triangular arc surface segments.

9. A cream dispensing cap for a cream pump container, characterized in that: The invention comprises a paste discharging valve assembly (1) for a paste pump container according to any one of claims 1 to 8, and further comprises a cover body (19), wherein a second through hole (21) for exposing the paste discharging end (3) is provided on the top of the cover body (19).

10. The paste dispensing cap for a paste pump container according to claim 9, characterized in that: A snap-fitting ridge (22) is provided circumferentially on the inner side wall of the cover body (19), and the snap-fitting ridge (22) is suitable for snapping with the outer side wall of the fixing ring (12) of the paste-discharging valve assembly (1) to fix the paste-discharging valve assembly (1) in the cover body (19).

11. A paste pump container, characterized in that: The invention comprises a paste discharge cap for a paste pump container as described in any one of claims 9 to 10, and further comprises a bottle body (23) and a pneumatic movable part (24), wherein the paste discharge cap for the paste pump container is detachably mounted on the top of the bottle body (23), the pneumatic movable part (24) is mounted inside the bottle body (23) and slidably cooperates with the inner wall of the bottle body (23), and the bottle body (23), the paste discharge cap and the pneumatic movable part (24) cooperate to form an inner cavity for accommodating paste.

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