Elastic bonnet for paste pump

Abstract

The utility model relates to an elastic valve bonnet for a paste pump, the elastic valve bonnet comprises an elastic thin surface and a supporting column body, the supporting column body penetrates along the axis to form a circulation channel, the elastic thin surface covers one end of the supporting column body in a sealing mode, and a plurality of kerfs are formed in the elastic thin surface from the middle to the periphery in the radial direction. The elastic thin surface is divided into a plurality of valves which can be deformed and overturned; and the other end of the supporting column body is provided with a mounting part for inserting a toothpaste outlet pipe. The self-suction performance is improved, vacuum can be rapidly formed through the self-suction function of the one-way valve based on the valve body structure optimized through fluid dynamics, and paste is rapidly discharged; and the paste discharging stability is enhanced, and the phenomena of paste fault, pump empty and wall hanging residue existing in a traditional pump head are effectively eliminated.

Description

Technical Field

[0001] This application relates to the field of valves, and more particularly to a resilient valve cap for an ointment pump. Background Technology

[0002] A toothpaste pump is a pump-type dispensing device used for packaging and conveying paste-like materials (such as toothpaste, facial cleanser, ointment, etc.). It typically includes a bottle for storing the paste, a pump head for dispensing the paste, and a flexible valve structure located within the pump head. During use, the user presses the pump head to force the paste through the valve body under internal pressure, achieving a quantitative and clean delivery of the contents.

[0003] A flexible valve is typically located downstream of the toothpaste pump nozzle. Its main function is to open when pressed to create a flow channel and automatically close after the pressure is released to prevent air backflow or backflow of the toothpaste, thereby maintaining the seal inside the bottle and the freshness of the toothpaste. To achieve these functions, flexible valves are generally made of flexible materials and utilize methods such as membrane structures or slit structures to achieve unidirectional opening and self-closing.

[0004] However, in the existing technology, the common elastic valve structure has the following defects: on the one hand, some elastic valve structures have insufficient sealing performance and are prone to leakage or air intake when not pressed, which can cause the paste to dry or deteriorate; on the other hand, some structures are not sensitive to opening when subjected to positive pressure from the paste, especially when dealing with high viscosity pastes, which can easily lead to problems such as poor paste dispensing or residual blockage. Utility Model Content

[0005] To address the problem of poor dispensing or residue blockage when dispensing high-viscosity pastes, this application provides an elastic valve cap for paste pumps.

[0006] This application provides a resilient valve cap for a paste pump, employing the following technical solution:

[0007] An elastic valve cap for an ointment pump includes an elastic thin surface and a support column. The support column extends along an axis to form a flow channel. The elastic thin surface seals and covers one end of the support column. The elastic thin surface has several slits arranged radially from the center to the periphery to divide the elastic thin surface into several deformable and flip-up valves. The other end of the support column is provided with an installation part for inserting and dispensing an ointment tube.

[0008] By adopting the above technical solution, the structure allows the ointment to be smoothly discharged when the user presses the ointment pump through the opening of the valve. After the pressing stops, the valve automatically closes to prevent the backflow of external air or impurities, thereby improving the hygiene and sealing performance and the stability of ointment dispensing during use.

[0009] Optionally, the radial cuts are 3 to 8 in number and are evenly distributed circumferentially around the axis of the support column.

[0010] By adopting the above technical solution, the number of slits and their uniform distribution enable the valves to open synchronously under the push of the ointment, preventing the ointment outlet direction from deviating or the flow rate from being uneven due to the opening of a single valve, thereby improving the consistency and controllability of the ointment outlet.

[0011] Optionally, the valve is closed in a static state to form a closed structure.

[0012] Optionally, the valve opens under internal pressure to form a star-shaped opening.

[0013] Optionally, the valve is a flippable three-dimensional elastic sheet structure surrounded by slits.

[0014] By adopting the above technical solution, the design ensures that the toothpaste pump nozzle is reliably sealed and leak-free when not in use, while multiple toothpaste dispensing channels can be formed simultaneously in the center when pressed, preventing toothpaste from accumulating at the outlet or being sprayed unevenly, thus improving the cleanliness and continuity of the toothpaste pump's discharge.

[0015] Optionally, the thickness of the elastic thin surface gradually increases from the periphery to the center.

[0016] Optionally, the thickness of the elastic thin surface gradually decreases from the periphery to the center.

[0017] Optionally, the thickness of the elastic thin surface is uniformly set.

[0018] By adopting the above technical solution, the structure with gradually varying or uniform thickness regulates the deformation distribution of the valve area under pressure, ensuring both opening sensitivity and stable rebound closing performance, thereby adapting to the discharge requirements of pastes of different viscosities.

[0019] Optionally, the side of the support column is connected to the elastic thin-surface arc.

[0020] By adopting the above technical solution, the arc transition eliminates the local stress concentration at the right-angle connection, making the arc surface more uniformly stressed when opening and closing, which helps to improve the deformation stability and sealing durability of the elastic thin surface.

[0021] Optionally, the support column is made of an elastic material.

[0022] Optionally, the support column is a silicone column.

[0023] Optionally, the elastic thin surface is a silicone arc surface.

[0024] By adopting the above technical solution, the use of elastic materials with resilience can ensure that the valve can close quickly after each use. In particular, when the pump body is repeatedly pressed, it can still maintain a stable one-way discharge function, avoiding air leakage or paste leakage caused by elastic decay after long-term use.

[0025] Optionally, the mounting portion is an elastic snap-fit ​​portion provided on the side of the end of the support column away from the elastic thin surface.

[0026] By adopting the above technical solution, the snap-fit ​​part makes it easy to quickly insert the valve cap to the outlet of the toothpaste pump head, ensuring a tight seal while also facilitating disassembly and maintenance, avoiding the complex and unstable installation problems caused by threads or adhesive methods.

[0027] Optionally, the elastic snap-fit ​​portion includes two rings of elastic protrusions disposed on the side of the support column, the elastic protrusions being arranged around the axis of the support column, and the two rings of elastic protrusions being arranged opposite to each other.

[0028] By adopting the above technical solution, the two protrusions provide axial limiting and circumferential stable support after being inserted into the slot structure, preventing the pump body from loosening, slipping or rotating misalignment during long-term use, and ensuring a stable and reliable discharge path.

[0029] Optionally, the two rings of elastic protrusions cooperate to form a snap-fit ​​groove for the external snap-fit ​​part to be inserted.

[0030] By adopting the above technical solution, the snap-fit ​​groove design enhances the engagement depth of the connecting parts, enabling the elastic valve cap to achieve a perceptible limiting fit during the insertion process, thus avoiding grease leakage or valve cap detachment caused by loose connection.

[0031] Optionally, the elastic protrusions are a first elastic protrusion and a second elastic protrusion.

[0032] Optionally, the side of the first elastic protrusion near the elastic thin surface is connected to the side of the support column by an arc, and the side of the first elastic protrusion away from the elastic thin surface is connected to the side of the support column at a right angle.

[0033] Optionally, the side of the second elastic protrusion near the elastic thin surface is connected at an angle to the side of the support column.

[0034] By adopting the above technical solution, the snap-fit ​​groove design enhances the engagement depth of the connecting parts, enabling the elastic valve cap to achieve a perceptible limiting fit during the insertion process, thus avoiding grease leakage or valve cap detachment caused by loose connection.

[0035] Optionally, the slits include two mutually perpendicular slits that intersect at the center of the elastic arc surface to form a cross-shaped structure. The two slits divide the elastic thin surface into four valve units. The central region of the valve unit on the side away from the center of the slit intersection and the adjacent support column portion are recessed toward the interior of the support column, so that the two sides of the formed recess form triangular arc surface segments.

[0036] Optionally, the non-recessed area of ​​the elastic thin surface forms a cross-shaped plane and is symmetrical with respect to the cut.

[0037] Optionally, the concave and non-concave regions of the elastic valve are connected by an arc.

[0038] This application contains at least one of the following beneficial effects:

[0039] 1. Improved self-priming performance: Based on a valve body structure optimized for fluid dynamics, the one-way valve's self-priming function can quickly create a vacuum, resulting in rapid paste dispensing;

[0040] 2. Enhanced paste dispensing stability, effectively eliminating paste fragmentation, empty pumping, and residue buildup that are present in traditional pump heads;

[0041] 3. Lightweight operation experience, reduced pressure for dispensing cream, achieving an extremely smooth experience that allows for easy one-handed operation. Attached Figure Description

[0042] Figure 1 A schematic diagram of a resilient valve cap for an ointment pump according to the first embodiment of this application. Figure One .

[0043] Figure 2 A schematic diagram of a resilient valve cap for an ointment pump according to the first embodiment of this application. Figure Two .

[0044] Figure 3 A schematic diagram of a resilient valve cap for an ointment pump according to a second embodiment of this application. Figure One .

[0045] Figure 4 A schematic diagram of a resilient valve cap for an ointment pump according to a second embodiment of this application. Figure Two .

[0046] Explanation of reference numerals in the attached figures:

[0047] 1. Elastic thin surface; 2. Support column; 3. Flow channel; 4. Cut; 5. Valve; 6. Installation part; 61. First elastic protrusion; 62. Second elastic protrusion; 63. Snap-fit ​​groove. Detailed Implementation

[0048] The present application will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the application and are not intended to limit the scope of the application.

[0049] In the following description, numerous specific details are set forth for illustrative purposes in order to provide a thorough understanding of the inventive concept. For clarity, not all features of the actual embodiment need to be described. Furthermore, the language used in this disclosure has been primarily chosen for readability and instructional purposes and may not have been chosen to define or limit the subject matter of the invention, thus requiring the necessary claims to determine such inventive subject matter. References to “an embodiment” or “an embodiment” in this disclosure mean that a particular feature, structure, or characteristic described in connection with that embodiment is included in at least one embodiment, and multiple references to “an embodiment” or “an embodiment” should not be construed as necessarily referring to the same embodiment.

[0050] Unless explicitly defined, the terms “a,” “an,” and “the” are not intended to refer to a singular entity, but rather to include a general category whose specific examples can be used for illustration. Therefore, the use of the terms “a” or “an” can mean any number of at least one, including “a,” “one or more,” “at least one,” and “one or more.” The term “or” means any of the options and any combination of the options, including all options unless explicitly indicated that the options are 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 items in the list. The phrase does not require all items listed unless explicitly defined as such.

[0051] The specific embodiments of the resilient valve cap of the present invention will be further described below with reference to the accompanying drawings. It should be understood that the embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0052] As shown in the figure, an elastic valve cap for an ointment pump includes an elastic thin surface 1 and a support column 2. The support column 2 forms a flow channel 3 for ointment flow along its axis. The elastic thin surface 1 seals and covers one end of the support column 2, and the other end of the support column 2 is provided with an installation part 6 for inserting and dispensing an ointment tube.

[0053] In one embodiment, reference is made to Figure 1 and Figure 2The elastic thin surface 1 is an arc surface with a central protrusion. Several slits 4 are arranged radially outward from the center of the elastic thin surface 1. In different embodiments, the number of slits can be selected as 3 to 8. In this embodiment, the number of slits 4 is preferably 6, and they are evenly distributed in the circumferential direction around the axis of the support column 2. Each slit 4 divides the elastic thin surface 1 into multiple deformable and flip-out valves 5. The valves 5 naturally close to form a sealing structure when not under pressure. During the pressing process of the ointment pump, when an upward positive pressure is formed inside, the valves 5 flip outward and open to form a star-shaped opening hole, allowing the ointment to flow out from the flow channel 3.

[0054] In this embodiment, the valve 5 is a three-dimensional elastic sheet structure surrounded by slits 4, which can deform under pressure and return to its initial closed state due to the elasticity of the material itself after the pressure is released. This structure ensures a tight seal at the outlet when the ointment pump is not in operation, preventing air or impurities from entering the container. At the same time, it can respond promptly to opening under pump pressure, improving ointment dispensing efficiency and cleanliness. In different embodiments, the three-dimensional structure of the valve 5 can be dome-shaped, conical, spherical, or a gradually curved surface structure, and its curvature can be set according to usage requirements to adapt to different opening response times or deformation requirements.

[0055] Furthermore, the thickness of the elastic thin surface 1 can be gradually thickened from the edge to the center, gradually thinned, or of uniform thickness. In a preferred embodiment, the elastic thin surface 1 gradually thins from the periphery to the center, thereby making the central region more easily deformable during pumping and improving the sensitivity of opening.

[0056] The sidewall of the supporting column 2 is connected to the elastic thin surface 1 by a rounded transition, which avoids sharp corners or edges, helps to improve the overall mechanical stress distribution, prevents fatigue damage to the material during repeated deformation, and improves service life.

[0057] In terms of material selection, both the supporting column 2 and the elastic thin surface 1 can be made of elastic material, preferably silicone, which not only satisfies good elastic recovery performance but also has good temperature resistance, chemical resistance, and food contact safety. In different embodiments, the elastic material can be silicone, or other polymer materials such as rubber or polyurethane, as long as it is a non-toxic polymer material that can naturally return to its original position and close the cut 4 after deformation.

[0058] In different embodiments, the structure of the slit 4 can also vary. In addition to the basic straight radial slit 4, it can also be an arc slit 4, a segmented zigzag slit 4, or a composite slit 4 structure with a preset concave section, so as to adjust the flipping mode and opening pressure threshold of the valve 5. The depth of the slit 4 can be set to be fully penetrating or semi-penetrating. In the semi-penetrating structure, the bottom of the slit 4 has a controllable membrane thickness, so as to form a one-time opening structure when used for the first time.

[0059] The mounting part 6 is located at the end of the support column 2 away from the elastic thin surface 1. Specifically, the mounting part 6 is an elastic snap-fit ​​part located on the outer side of the support column 2. The mounting part 6 includes two rings of elastic protrusions located on the side of the support column 2 and extending around its axis. The two rings of elastic protrusions are arranged opposite each other, forming a snap-fit ​​groove 63 between them for engaging with the insertion part of the toothpaste pump body. The elastic protrusions undergo slight elastic deformation when inserted into the pump body, providing a reliable snap-fit ​​force, and automatically spring back to the positioning state after release.

[0060] Optionally, the two elastic protrusions are defined as a first elastic protrusion 61 and a second elastic protrusion 62, respectively. The side of the first elastic protrusion 61 closest to the elastic thin surface 1 is connected to the support column 2 in an arc manner, and the side away from the elastic thin surface 1 is connected at a right angle to form a backstop and limit function. The side of the second elastic protrusion 62 closest to the elastic thin surface 1 is connected to the outer wall of the column in an angle manner, thereby providing initial guidance and pre-tightening elasticity during the insertion of the pump body.

[0061] In different embodiments, the connection between the first elastic protrusion 61 and the support column 2 can also be a sloped transition or a curved transition, or a locally thickened structure can be used to enhance the anti-reverse function; the second elastic protrusion 62 can also adopt a rounded corner connection or a flexible rib structure to improve the adaptability of insertion force. In another optional solution, the snap-fit ​​groove 63 between the two protrusions can also be provided with a reinforcing rib or a flexible inner lip structure to improve the mating sealing performance and enhance the connection stability.

[0062] In another embodiment, reference Figure 3 and Figure 4 The slit 4 includes two mutually perpendicular slits 4 that intersect at the center of the elastic thin surface 1 to form a cross-shaped structure. These two slits 4 divide the elastic thin surface 1 into four symmetrical valve units 5. The adjacent edges of the geometry of each valve unit 5 are defined by the two adjacent slits 4, and the bottom edge is connected to the edge of the support column 2, forming a unit structure that can elastically flip under pressure.

[0063] In a preferred embodiment, each valve 5 unit, in its central region on the side furthest from the intersection of the slits 4, is recessed towards the interior of the adjacent support column 2, thereby forming an inwardly curved concave structure at this location. The two sides of this concave structure naturally form slightly triangular arcuate segments. This structure remains naturally closed when not pressed, and symmetrically flips open along the direction of the slits 4 under positive pressure, forming a cross-shaped ointment outlet between the four valves 5.

[0064] Preferably, the elastic thin surface 1 forms a cross-shaped planar structure in the non-recessed area. The cross-shaped planes are arranged in a mirror-symmetric manner with respect to the direction of the slit 4 and are located on the same horizontal plane in the undeformed state, which helps to ensure that the valve 5 fits tightly in the closed state and maintains structural stability.

[0065] Furthermore, to improve the elastic response performance of the valve 5 region, the concave region and the non-concave region are connected by a transition arc structure, so that the valve 5 unit generates a continuous deformation path when it flips open, avoiding material fatigue or fracture caused by local stress concentration.

[0066] In other embodiments, the elastic thin surface 1 and the supporting column 2 can be integrally formed, or they can be fixedly connected by means of heat fusion, interlocking connection, etc., depending on the specific mold process requirements.

[0067] In a further optimized design, the slits 4 can also be arranged in three or four intersecting lines to form a six- or eight-lobed structure, in order to accommodate the discharge requirements of higher flow rates or different viscosity pastes. In another modified embodiment, the recessed portion of the valve unit 5 can also be a polygonal arc surface, a gradually varying thickness structure, or a multi-segment curvature structure, in order to adjust the opening angle and rebound speed.

[0068] With the above structure, the elastic valve cap provided in this embodiment can achieve one-way opening, automatic closing, backflow prevention, convenient installation and reliable sealing during the use of the ointment pump. It is suitable for pump-filled products that require clean and quantitative discharge of ointment, such as toothpaste, skin cream, ointment and other fields.

[0069] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A resilient valve cap for an ointment pump, characterized in that, It includes an elastic thin surface (1) and a support column (2). The support column (2) forms a flow channel (3) through the axis. The elastic thin surface (1) seals and covers one end of the support column (2). The elastic thin surface (1) has several slits (4) arranged radially from the center to the periphery to divide the elastic thin surface (1) into several deformable and flip-up valves (5). The other end of the support column (2) is provided with an installation part (6) for inserting and dispensing ointment tubes.

2. The resilient valve cap for an ointment pump according to claim 1, characterized in that, The radial cuts (4) are 3 to 8 in number and are evenly distributed in the circumferential direction around the axis of the support column (2).

3. The resilient valve cap for an ointment pump according to claim 2, characterized in that, The valve (5) is closed and forms a closed structure in a static state; And / or, the valve (5) opens under internal pressure and forms a star-shaped opening; And / or, the valve (5) is a reversible three-dimensional elastic sheet structure surrounded by slits (4).

4. The resilient valve cap for an ointment pump according to claim 1, characterized in that, The thickness of the elastic thin surface (1) gradually increases from the periphery to the center; Alternatively, the thickness of the elastic thin surface (1) gradually decreases from the periphery to the center; Alternatively, the thickness of the elastic thin surface (1) may be uniformly set.

5. The resilient valve cap for an ointment pump according to claim 1, characterized in that, The side of the supporting column (2) is connected to the elastic thin surface (1) by an arc.

6. The resilient valve cap for an ointment pump according to claim 1, characterized in that, The supporting column (2) is made of an elastic material; Alternatively, the supporting column (2) may be a silicone column; Alternatively, the elastic thin surface (1) may be a silicone arc surface.

7. The resilient valve cap for an ointment pump according to claim 1, characterized in that, The mounting part (6) is an elastic snap-fit ​​part provided on the side of the support column (2) away from the elastic thin surface (1).

8. The resilient valve cap for an ointment pump according to claim 1, characterized in that, The slit (4) includes two slits (4) that are perpendicular to each other and intersect at the center of the elastic thin surface to form a cross-shaped structure. The two slits (4) divide the elastic thin surface (1) into four valve (5) units. The middle region of the valve (5) unit on the side away from the center of the intersection of the slits (4) and the adjacent support column (2) are recessed towards the inside of the support column (2) so that the two sides of the recessed part form triangular arc segments.

9. The resilient valve cap for an ointment pump according to claim 8, characterized in that, The non-recessed area of ​​the elastic thin surface (1) forms a cross plane and is symmetrical with respect to the cut (4).

10. The resilient valve cap for an ointment pump according to claim 8 or 9, characterized in that, The concave and non-concave regions of the elastic valve (5) are connected by an arc.

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