A direct drive lever type paste pump-out device

Abstract

The application relates to a direct-drive lever type paste pumping device, which comprises a pipe body and a pumping unit, the pumping unit comprising an elastic bowl body, an elastic gourd pipe, an end cover, a paste outlet head and a lever, the elastic bowl body, the elastic gourd pipe and the end cover jointly defining a preliminary discharging cavity for quantitative storage, a user presses the paste outlet head to directly deform the elastic gourd pipe on one hand and drive the elastic bowl body to deform through the lever on the other hand, and the preliminary discharging cavity is compressed to realize paste pumping. The application forms a labor-saving structure when the elastic bowl body is pressed through the setting of the lever, and the pressing force of the user is obviously reduced; meanwhile, the design of the elastic gourd pipe makes the pressing stroke segmented, so that the overall pressing process is more stable and labor-saving.

Description

Technical Field

[0001] This application relates to the field of daily chemical products, and in particular to a direct-drive lever-type ointment pump device. Background Technology

[0002] Pump containers, widely used in cosmetics, personal care products, and pharmaceuticals, are favored in the market due to their ease of use and ability to reduce direct contact between the contents and the external environment. Especially for viscous or semi-fluid materials such as creams and gels, the method of dispensing the contents by pressing the pump head offers significant advantages in hygiene and convenience compared to traditional wide-mouth bottles or squeeze tubes.

[0003] However, existing conventional ointment pumps still have several inherent technical bottlenecks in terms of functionality and performance. First, regarding the accuracy of dispensing, the dispensing volume of traditional pump heads is directly related to the user's pressing pressure, speed, and stroke, making it difficult to achieve precise and consistent dispensing. For cosmeceutical products that require precise dosage control or high-cost serum-type skincare products, this uncertainty often leads to improper dosage or unnecessary waste.

[0004] In related technologies, an intermediate storage space is formed at the nozzle. This intermediate storage space serves as a quantitative container for the ointment dispensed from the storage chamber. When the nozzle is squeezed, the intermediate storage space is compressed, thereby pumping out the ointment within it. When the hand is released, the ointment is drawn back into the storage chamber. While this solves the aforementioned problem, the ointment pump tube may be designed to be too thick, or the user's hand may be small. When gripping the ointment pump and pressing with the thumb, the proximal phalanx of the thumb is straight, while the distal phalanx overlaps the top of the nozzle. This results in a relatively large pressing torque, which may make it difficult to press down due to greater resistance, leading to a poor user experience. Utility Model Content

[0005] To facilitate the user's extrusion of ointment from the intermediate storage space of the ointment pump, this application provides a direct-drive lever-type ointment pumping device.

[0006] This application provides a direct-drive lever-type ointment pumping device, which adopts the following technical solution: A direct-drive lever-type ointment pump device includes: tube body; A cap, which is detachably installed on the top of the tube body; A pumping unit is disposed at the upper end of the tube body, and a storage cavity for storing ointment is formed below the pumping unit in the tube body; The pumping unit includes: An elastic bowl body, the edge of which is fixedly connected to the inner wall of the tube body; An elastic gourd tube is installed on the top of an elastic bowl and connects to the inside of the elastic bowl. An end cap is disposed below the elastic bowl body. The elastic bowl body and the elastic hoist tube work together with the end cap to form a pre-discharge chamber. The end cap is provided with a one-way through hole connecting the storage chamber and the pre-discharge chamber. The paste outlet is fixedly connected to the top of the elastic gourd tube and has a one-way paste outlet channel communicating with the pre-discharge chamber. The paste outlet is slidably mounted on the cover. A lever, one end of which is rotatably connected to the inner wall of the cap, the middle part of which overlaps the top surface of the elastic bowl, and the other end of which is lifted by the elastic bowl and abuts against the bottom surface of the dispensing nozzle.

[0007] Optionally, a telescopic one-way valve is also included. The telescopic one-way valve is disposed at the one-way through hole and is used to open when the elastic bowl and / or elastic hoist tube are reset to allow the paste to flow unidirectionally from the storage chamber into the pre-discharge chamber, and to close when the elastic bowl and / or elastic hoist tube are deformed by pressure.

[0008] Optionally, the lever is arranged in a ring shape, and one side of the outer ring wall of the lever is fixedly connected to the inner side wall of the cap by a rotating shaft plate, which can be bent and deformed up and down; the top of the elastic bowl body forms an overlapping platform, the middle part of the lever is through which the elastic gourd tube passes and the bottom surface of the lever abuts against the overlapping platform; the end of the lever away from the rotating shaft plate protrudes upward and forms a pressing overlapping part, which abuts against the bottom end of the ointment outlet.

[0009] Optionally, a first one-way valve is also included, which is disposed at the bottom end of the one-way paste outlet channel and is used to open when the pre-discharge chamber is compressed to allow the paste to be pumped out in one direction.

[0010] Optionally, a second one-way valve is also included, which is disposed at the top of the one-way paste outlet channel and is used to open when the pre-discharge chamber is compressed to allow the paste to be pumped out in one direction.

[0011] Optionally, the bottom of the dispensing head has an outer tube and an inner tube, the outer tube is slidably connected to the cap, the inner tube has a longitudinal dispensing channel, and the top of the dispensing head has a transverse dispensing channel, which is connected to the longitudinal dispensing channel; the first one-way valve is installed in the longitudinal dispensing channel, and the second one-way valve is installed in the transverse dispensing channel.

[0012] Optionally, the top end of the elastic gourd tube is tapered into a tubular shape and extends outward, elastically fitting onto the outer wall of the inner tube.

[0013] Optionally, the dispensing head is detachably fitted with a replacement seal at the outlet of the transverse dispensing channel, and the replacement seal is provided with a dispensing hole.

[0014] Optionally, the bottom end of the longitudinal paste dispensing channel has a first step and a second step forming from high to low. The first one-way valve is installed in the longitudinal paste dispensing channel, and its bottom edge protrudes to form a flange, which abuts against the first step. A locking and limiting member is installed at the bottom end of the longitudinal paste dispensing channel, and the locking and limiting member is fixedly installed in the one-way paste dispensing channel and presses the flange of the first one-way valve against the first step. Optionally, the first one-way valve has a closed dispensing end, an open connecting end, and a neck connecting the dispensing end and the connecting end; the dispensing end has a central slit that can be opened by the pressure of the ointment; the slit includes 4 to 8 grooves, which extend outward from the middle of the dispensing end and are evenly distributed around the center of the dispensing end; the bottom edge of the locking and limiting member protrudes outward and abuts against the second step of the longitudinal dispensing channel, and the outer side wall of the locking and limiting member is locked with the inner side wall of the one-way channel; the grooves divide the dispensing end into several deformable and flip-out valves; the valves are closed in a static state and form a closed structure; the valves open under internal pressure and form a star-shaped opening hole; the valves are flip-out three-dimensional elastic sheet structures surrounded by grooves.

[0015] Optionally, a first limiting ring is formed on the side wall of the tube body, and the edge of the end cap abuts against the top of the first limiting ring; the telescopic one-way valve includes a support ring, a plurality of elastic rotating arms and the elastic valve plate, the support ring is installed on the end cap and fixed to the edge of the end cap, one end of the elastic rotating arm is connected to the inner side wall of the support ring, and the other end bends and extends toward the outer side wall of the elastic valve plate and connects thereto, and the plurality of elastic rotating arms are evenly arranged around the center of the elastic valve plate.

[0016] In summary, this application includes at least one of the following beneficial technical effects: 1. This application is equipped with a multi-check valve system. The telescopic check valve opens when replenishing material and closes when pumping out, preventing the backflow of paste in the pre-discharge chamber. The paste discharge check valve, as the outlet valve, is composed of a valve that can close automatically. After pumping, it can immediately close the paste discharge channel, effectively preventing outside air from being sucked back into the pump body when the pump head resets. At the same time, it avoids the paste at the outlet from drying or becoming contaminated due to prolonged contact with air, thus ensuring the hygiene and quality of the contents.

[0017] 2. This application overcomes the problem of increased resistance caused by multiple one-way valves. Since the pressing resistance of the dispensing nozzle is related to the dispensing resistance, the presence of both the first and second one-way valves increases the dispensing resistance. Furthermore, due to the physiological structure of the thumb and the user's usage habits, it is difficult to apply force at the beginning of pressing the dispensing nozzle. Therefore, this application creatively utilizes a lever to divide the pressing stroke into two parts. In the first part of the stroke, a force-saving lever is used to squeeze the elastic cup, reducing the squeezing force required for this part of the stroke. After the thumb presses down a certain distance, the proximal phalanx tilts, reducing the force torque of the thumb, and then the second part of the stroke begins. In the second part of the stroke, the user can squeeze the elastic gourd tube at a more comfortable angle, further extruding the ointment from the prepared storage chamber. Through the lever and two-stage stroke design, the user can comfortably extrude the ointment, improving the user experience.

[0018] 3. This application separates the dispensing action from the main storage chamber by setting up a pre-dispensing chamber with a relatively fixed volume, defined by an elastic bowl, an elastic gourd tube, and an end cap, inside the pumping unit. Each press only pumps out the paste in this pre-dispensing chamber, thus eliminating dependence on the user's pressing pressure and time, achieving precise and consistent quantitative dispensing, avoiding waste, and improving the user experience. Attached Figure Description

[0019] Figure 1 A schematic diagram of a direct-drive lever-type paste pump according to one embodiment of the present invention is shown.

[0020] Figure 2 for Figure 1 Longitudinal cross-sectional view.

[0021] Figure 3 An exploded view of a direct-drive lever-type paste pump according to one embodiment of the present invention is shown.

[0022] Figure 4 for Figure 3 Longitudinal cross-sectional view.

[0023] Figure 5 A schematic diagram of the end cap in one embodiment of the present invention is shown.

[0024] Figure 6 illustrates a schematic diagram of a telescopic check valve in one embodiment of the present invention.

[0025] Figure 7 Illustration of one embodiment of the present invention Figure 4 Enlarged diagram of point A in the middle.

[0026] Figure 8 This is a schematic diagram illustrating the cooperation between the lever and the elastic bowl in one embodiment of the present invention.

[0027] Figure 9 A schematic diagram of a first check valve in one embodiment of the present invention is shown.

[0028] Figure 10 illustrates a schematic diagram of a second check valve in one embodiment of the present invention.

[0029] Explanation of reference numerals in the attached figures: 1. Pipe body; 11. First limiting ring; 12. First insertion gap; 13. Preparatory discharge chamber; 14. Storage chamber; 2. Pumping unit; 201. Flexible bowl body; 2011. Raised edge; 2012. Overlapping countertop; 202. Flexible gourd tube; 22. End cap; 221. One-way through hole; 222. Sealing groove; 232. Dispensing nozzle; 2321. Horizontal dispensing channel; 2322. Vertical dispensing channel; 2323. Inner tube; 2324. Outer tube; 2325. Dispensing groove; 233. Replacement cap; 2331. Capping tube wall; 2332. Capping top plate; 2333. Dispensing hole; 234. Snap-fit ​​limiting component; 24. Telescopic check valve; 241. Support ring; 242. Resilient valve plate; 243. Resilient swivel arm; 244. Sealing protrusion; 25. First one-way valve; 251. Ointment outlet; 252. Connecting end; 253. Neck; 254. Incision; 255. Valve; 256. Flange; 26. Second check valve; 27. Lever; 271. Rotating shaft; 272. Pressing overlap; 3. One-way airtight unit; 31. Piston; 311. Medium cavity; 312. Gas cavity; 313. Plug; 314. Sealing sleeve; 32. One-way air inlet valve; 33. Airtight base; 4. Cover. Detailed Implementation

[0030] 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 present application and are not intended to limit the scope of the application.

[0031] 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.

[0032] 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.

[0033] This application discloses a direct-drive lever-type paste pump, referring to... Figure 1 and Figure 2 The ointment pump includes a one-way airtight unit 3, and the pumping device includes a pumping tube 1, a pumping unit 2, and a cap 4. The pumping unit 2 is located at the upper end of the tube 1 and is used to perform a metered pumping action of the ointment. The cap 4 is detachably installed on the top of the tube 1. The one-way airtight unit 3 is located at the lower end of the tube 1, and together with the tube 1, defines a storage chamber 14 for containing the ointment. During pumping, the one-way airtight unit 3 can move unidirectionally along the inner wall of the tube 1 towards the pumping unit 2 to continuously apply pressure to the ointment in the storage chamber 14.

[0034] The direct-drive lever-type paste pumping device provided in this application embodiment, in coordination with the one-way airtight unit 3, not only achieves precise and consistent quantitative dispensing, but also possesses excellent airtight performance due to its internal structure. This effectively prevents the paste from being contaminated or drying out during use, while ensuring that the paste can be pumped out stably and completely, significantly improving product utilization and the overall user experience.

[0035] Specifically, refer to Figure 1 and Figure 2The tube body 1 is the main structure that houses the ointment and all internal components. The cross-sectional shape of the tube body 1 can be circular, square, or other polygonal according to design requirements, but its inner wall must have a constant cross-sectional profile along its axial direction to ensure that the unidirectional airtight unit 3 can slide smoothly and unobstructed within the tube body 1. Regarding material selection, the tube body 1 is preferably made of non-toxic and chemically stable materials, such as food-grade or cosmetic-grade plastics like polypropylene (PP) and polyethylene terephthalate (PET), to ensure that it will not react with the contained ointment, thereby guaranteeing product safety.

[0036] Reference Figure 2-4 The one-way airtight unit 3 is located at the lower end of the tube body 1 and forms a dynamic sealing fit with the inner wall of the tube body 1. Its overall structure allows it to slide only in one direction along the inner wall of the tube body 1 toward the pumping unit 2, and cannot move in the opposite direction, so that the paste in the storage chamber 14 is always kept in a dense state under pressure.

[0037] In one specific embodiment, the one-way airtight unit 3 includes a piston 31, a one-way air inlet valve 32, and an airtight base 33. The piston 31 is slidably disposed within the tube body 1, and through a sealing fit between its periphery and the inner wall of the tube body 1, divides the space below the tube body 1 into a non-communicating medium cavity 311 and a gas cavity 312. The medium cavity 311 is located above the piston 31 and is used to directly contain and push the ointment, while the gas cavity 312 is located below the piston 31. The airtight base 33 is installed at the bottom of the tube body 1 to separate the interior of the tube body 1 from the outside. The one-way air inlet valve 32 is installed on the airtight base 33 to allow one-way communication between the gas cavity 312 and the outside. Its function is to allow outside air to enter the gas cavity 312 in one direction to balance the internal pressure, while preventing air from escaping from the gas cavity 312.

[0038] To achieve reliable unidirectional sliding and sealing, the structure of the piston 31 can be further optimized. For example, the piston 31 may include a plug body 313 and a sealing sleeve 314 fitted around the periphery of the plug body 313. The sealing sleeve 314 is a tubular structure with a concave waist, and its upper and lower edges abut against the inner wall of the tube body 1 and seal tightly, with its middle part connected to the plug body 313. A gap may be formed between the sealing sleeve 314 and the inner wall of the tube body 1, and the sealing sleeve 314 itself has elastic deformation characteristics. The purpose of this is to form a double seal between the sealing sleeve 314 and the inner wall of the tube body 1. When the inner wall of the tube body 1 deforms, causing a temporary failure of the seal at one end of the sealing sleeve 314, the other end can still function.

[0039] When the internal pressure of the medium cavity 311 decreases, the piston 31 slides upward due to the pressure difference between its upper and lower sides, pushing the paste inside the medium cavity 311 upward. At this time, the internal air pressure of the gas cavity 312 decreases and becomes less than the external atmospheric pressure, so the one-way air inlet valve 32 opens until the gas cavity 312 is balanced with the external air pressure. When the internal pressure of the medium cavity 311 increases, the piston 31 moves slightly downward, causing the internal air pressure of the gas cavity 312 to increase and become greater than the external atmospheric pressure. The one-way air inlet valve 32 closes, preventing the piston 31 from moving further downward.

[0040] Reference Figure 2-4 The pumping unit 2 is installed on the upper end of the pipe body 1, while the cover 4 surrounds the outside of the pumping unit 2 and is slidably connected to it. In other words, the cover 4 is equivalent to an extension of the upper part of the pipe body 1, and the pumping unit 2 is restricted by the cover 4 above the pipe body 1 and moves up and down along the axial direction of the pipe body 1. Specifically, the shape of the cover 4 is adapted to the shape of the pipe body 1. For example, when the pipe body 1 is a square tube, the cover 4 is also designed to be square. When the pipe body 1 is a round tube, the cover 4 is also designed to be round. The cover 4 is detachably installed on the pipe body 1. In different embodiments, the cover 4 and the pipe body 1 can have different connection methods, such as snap-fit ​​connection. The cover 4 is designed so that after the components of the pumping unit 2 are sequentially installed into the upper part of the pipe body 1, the cover 4 can be used to press the pumping unit 2, thus limiting the accidental movement of the components of the pumping unit 2 and facilitating assembly during automated production.

[0041] In one embodiment, the pumping unit 2 mainly consists of an elastic bowl 201, an elastic gourd tube 202, an end cap 22, a discharge nozzle 232, a telescopic one-way valve 24, a first one-way valve 25, and a second one-way valve 26. The outer edge of the elastic bowl 201 is fixedly connected to the inner wall of the upper end of the tube 1, forming the basic structure and seal of the pump head. The end cap 22 is located below the elastic bowl 201, and the elastic bowl 201 and the elastic gourd tube 202, together with the end cap 22, form a pre-discharge chamber 13 for quantitative discharge. The discharge nozzle 232 is installed on the elastic bowl 201 and serves as a pressing component directly operated by the user; its action causes deformation of the elastic bowl 201 and the elastic gourd tube 202. The telescopic check valve 24 and the first check valve 25 serve as the inlet and outlet valves of the pre-discharge chamber 13, respectively, while the first check valve 25 and the second check valve 26 serve as the inlet and outlet valves of the paste outlet 232, respectively. The telescopic check valve 24 controls the connection between the storage chamber 14 and the pre-discharge chamber 13, while the first check valve 25 and the second check valve 26 control the connection between the pre-discharge chamber 13 and the interior of the paste outlet 232. The second check valve 26 controls the connection between the interior of the paste outlet 232 and the outside. The two work together to ensure that the paste can flow in one direction and in an orderly manner.

[0042] Specifically, refer to Figure 5 The end cap 22 is a generally disc-shaped component installed below the elastic bowl 201. The upper surface of the end cap 22 and the lower surface of the elastic bowl 201 together form a pre-discharge chamber 13 with a relatively fixed volume. This pre-discharge chamber 13 is used to pre-store a fixed amount of ointment before each pumping action. In the central region of the end cap 22, one or more one-way through-holes 221 are provided. These one-way through-holes 221 serve as connecting channels, linking the upper pre-discharge chamber 13 to the lower storage chamber 14. Ointment is replenished from the storage chamber 14 to the pre-discharge chamber 13 through these one-way through-holes 221. It should be noted that the one-way flow function of the one-way through-hole 221 is achieved by a telescopic one-way valve 24, not by the structure of the through-hole itself.

[0043] Reference Figure 2 To ensure a secure installation of the end cap 22, a first limiting ring 11, serving as a support structure, can be integrally formed on the inner wall of the tube body 1 along its circumference. This first limiting ring 11 is an inwardly protruding annular step with a top bearing surface for support. The outer peripheral edge of the end cap 22 overlaps and abuts against the top bearing surface of the first limiting ring 11. The first limiting ring 11 provides axial positioning and support for the end cap 22, ensuring that it does not shift downwards when subjected to pressing pressure and ointment pressure.

[0044] Reference Figure 2 and Figure 3 The telescopic one-way valve 24, acting as the feed control valve for the pre-discharge chamber 13, is located at the one-way through hole 221 of the end cap 22 and is responsible for controlling the one-way flow of the ointment from the storage chamber 14 to the pre-discharge chamber 13. When the elastic bowl 201 is deformed by pressure, the telescopic one-way valve 24 closes to prevent the ointment in the pre-discharge chamber 13 from flowing back into the storage chamber 14; when the elastic bowl 201 returns to its original position, the telescopic one-way valve 24 opens to allow the ointment to enter the pre-discharge chamber 13 for replenishment under negative pressure.

[0045] In one specific embodiment, referring to FIG6, the telescopic check valve 24 mainly includes a support ring 241, an elastic valve plate 242, and several elastic rotating arms 243 connecting the two. The support ring 241 serves as a fixed base, mounted on the end cap 22, and fixed to the second limiting ring by snap-fit ​​or other means. The elastic valve plate 242 is the movable component that performs the functions of sealing and opening the through hole.

[0046] The elastic rotating arms 243 connecting the support ring 241 and the elastic valve plate 242 are used to realize the one-way valve function. One end of each elastic rotating arm 243 is connected to the inner wall of the fixed support ring 241, and the other end bends towards and connects to the outer wall of the elastic valve plate 242 along a smooth curved trajectory. Several elastic rotating arms 243 are arranged in a uniform radial or circumferential array with reference to the center of the elastic valve plate 242. Figure 6a and 6b The shape of the elastic rotating arm 243 can vary, but any shape that allows the elastic valve plate 242 to bend and straighten upwards under the push of the paste flow, so that the elastic valve plate 242 is relatively far away from the support ring 241 and opens the one-way through hole 221, is acceptable. Additionally, refer to... Figure 6b and Figure 6c The design of varying numbers of elastic rotating arms 243 allows for different opening thresholds of the elastic valve plate 242, which can be set as needed. (Refer to...) Figure 6b and Figure 6d In different embodiments, the radial width of the support ring 241 can also be adaptively adjusted as needed. In summary, the elastic rotating arm 243 enables the elastic valve plate 242 to stably reciprocate axially under the constraint and support of the elastic rotating arm 243, i.e., switching between open and closed positions, without significant tilting or eccentricity, ensuring the reliability and sealing of the valve operation. Since there can be one or more one-way through holes 221 in different embodiments, the shape of the elastic valve plate 242 does not need to be specifically limited, as long as it can cover all one-way through holes 221. In a preferred embodiment, the one-way through holes 221 are circular holes and the elastic valve plate 242 is a circular plate whose bottom can cover the through holes.

[0047] To further improve the sealing reliability of the telescopic check valve 24 when closed, in a further embodiment, the end cap 22 may have a corresponding structure on its inner edge at the one-way through hole 221. Specifically, the inner edge of the end cap 22, facing the discharge nozzle 232 (i.e., upward), has a raised annular structure that is bent or integrally formed, thereby creating a contact surface specifically for mating with the elastic valve plate 242. When the pressure inside the pre-discharge chamber 13 increases, the elastic valve plate 242 is pressed down, and the bottom surface of the elastic valve plate 242 fits tightly against the contact surface, thus sealing the through hole.

[0048] Furthermore, to achieve better airtightness, refer to Figure 5 and Figure 7A sealing groove 222 can be provided on the abutment surface formed by the end cap 22, and a matching sealing protrusion 244 is provided at the corresponding position on the elastic valve plate 242. When the telescopic check valve 24 is closed, the sealing protrusion 244 can be precisely embedded in the sealing groove 222. This convex-concave fitting structure forms a curved sealing path, which greatly increases the resistance to backflow of the ointment and improves the contact pressure per unit area, thereby achieving a highly reliable surface sealing effect. For example, the sealing groove 222 can be one or more annular grooves with V-shaped or U-shaped cross sections concentrically arranged on the abutment surface. Correspondingly, an annular sealing protrusion 244 that perfectly matches the sealing groove 222 in shape, size, and position is integrally formed on the bottom surface of the elastic valve plate 242.

[0049] Reference Figure 8 The elastic bowl 201 and the elastic gourd tube 202 are used in the pumping unit 2 to realize power conversion and volume change. The elastic gourd tube 202 is specifically gourd-shaped, meaning its side walls bulge outwards at both ends and are concave in the middle. The top of the elastic gourd tube 202 tapers into a smaller diameter tubular structure and fits onto the inlet of the paste outlet 232. In a specific embodiment, the elastic bowl 201 and the elastic gourd tube 202 can be integrally injection molded from materials such as thermoplastic elastomer (TPE) or silicone, or other materials, as long as they have sufficient elasticity and deformation recovery capacity and are food-grade safe.

[0050] To ensure a strong and sealed connection between the elastic bowl 201 and the tube 1, specifically, refer to... Figure 2 or Figure 4The tube body 1 protrudes inwards from above the first limiting ring 11 and bends towards the first limiting ring 11, thereby forming an annular first insertion gap 12 on the inner wall of the tube body 1. The opening of the first insertion gap 12 faces the end cap 22. Correspondingly, a protruding edge 2011 matching the first insertion gap 12 is integrally formed on the outermost peripheral edge of the elastic bowl 201. During assembly, the upper end of the protruding edge 2011 of the elastic bowl 201 is embedded and held in the first insertion gap 12 of the tube body 1, while the lower end of the protruding edge 2011 is tightly pressed against the top edge of the lower end cap 22. This structure not only firmly fixes the elastic bowl 201 to the tube body 1, preventing it from moving axially or radially, but also further enhances the structural stability and sealing of the entire pumping unit 2 head by clamping the end cap 22 between the elastic bowl 201 and the first limiting ring 11. For example, the first insertion gap 12 can be an annular groove with an inverted snap structure. Correspondingly, the protruding edge 2011 of the outer edge of the elastic bowl 201 can be designed to have a hook shape that matches the inverted snap structure, so that once engaged, a firm, non-disengaging snap-fit ​​fixation can be formed. It should be noted that in different embodiments, the position of the internal protrusion of the inner wall of the tube 1 forming the first insertion gap 12 is not fixed, and can be set vertically as needed during design, as long as it can cooperate with the elastic bowl 201 so that the elastic bowl 201 can press upward and downward against the end cap 22.

[0051] When stationary, the elastic bowl 201 and the elastic gourd tube 202 maintain their natural shapes, keeping the internal pre-discharge chamber 13 at its maximum volume. When the user presses the dispensing nozzle 232, some external force compresses the elastic gourd tube 202 through the nozzle, causing the protruding side portion of the elastic gourd tube 202 to deform and compress. Simultaneously, the dispensing nozzle 232, with the aid of the lever 27, compresses the elastic bowl 201, causing the lower half of the bowl-shaped elastic bowl 201 to be compressed downwards and inwards, like a compressed diaphragm. This action reduces the volume of the pre-discharge chamber 13, thereby pressurizing and pumping out the internal paste.

[0052] Reference Figure 2 and Figure 4The paste dispensing head 232 is mounted on the elastic gourd tube 202 and operates in conjunction with it. Additionally, the paste dispensing head 232 is installed in the cap 4 and slides vertically with the cap 4. The paste dispensing head 232 has a through-hole dispensing channel for guiding the paste flow, which is connected to the pre-dispensing chamber 13. By applying downward pressure to the top of the paste dispensing head 232, it causes the elastic bowl 201 to undergo controlled compression deformation, thereby completing the pumping out of the paste. Specifically, the bottom of the dispensing nozzle 232 has an outer tube 2324 and an inner tube 2323. The outer tube 2324 is slidably connected to the cap 4. The inner tube 2323 forms a longitudinal dispensing channel 2322. The top of the dispensing nozzle 232 has a transverse dispensing channel 2321. The transverse dispensing channel 2321 is connected to the longitudinal dispensing channel 2322, forming the aforementioned one-way dispensing channel. The first one-way valve 25 is installed in the longitudinal dispensing channel 2322, and the second one-way valve 26 is installed in the transverse dispensing channel 2321.

[0053] The top end of the flexible hoist tube 202 is elastically fitted onto the outer wall of the bottom end of the inner tube 2323, so that the inner tube 2323 is connected to the pre-discharge chamber 13. To achieve a stable installation of the first one-way valve 25, at least two steps are formed on the side wall of the bottom end of the inner tube 2323, namely the first step and the second step from top to bottom. The first one-way valve 25 is installed in the longitudinal paste discharge channel 2322, and its bottom edge protrudes outward and abuts against the first step. The first step acts as an annular bearing surface, providing precise axial positioning for the first one-way valve 25. Inside the inner tube 2323, below the first one-way valve 25, a snap-fit ​​limiting member 234 is provided. The snap-fit ​​limiting member 234 is fixedly installed in the longitudinal paste discharge channel 2322, and its top tightly presses the protruding edge 2011 of the bottom of the first one-way valve 25 against the first step, thereby completing the fixation of the first one-way valve 25. The bottom edge of the locking and limiting member 234 also protrudes outward and abuts against the second step, and the outer wall of the locking and limiting member 234 engages with the inner wall of the paste dispensing channel. In a preferred embodiment, the locking and limiting member 234 can be a tubular object with radial elasticity in the middle of its outer wall or a tubular object with an interference fit outer diameter in the middle of its outer wall. After being pressed into the longitudinal paste dispensing channel 2322, the middle of the outer wall of the locking and limiting member 234 is tightly engaged or locked with the inner wall of the longitudinal paste dispensing channel 2322, thereby firmly locking the first one-way valve 25 in the working position.

[0054] The first one-way valve 25 opens when the pre-discharge chamber 13 is compressed and the internal pressure increases, allowing the ointment to be pumped out in one direction, and closes immediately after the pressure disappears to prevent external contaminants from entering and the ointment from shrinking back.

[0055] Reference Figure 9In one embodiment, the first one-way valve 25 has an externally facing, normally closed dispensing end 251, an open connecting end 252 for installation and positioning, and a neck 253 connecting the dispensing end 251 and the connecting end 252. The dispensing end 251 has a central slit 254 that can be opened by the pressure of the ointment. In a preferred embodiment, the first one-way valve 25 is integrally molded from medical-grade silicone or other elastomeric materials with good elasticity and chemical stability, and its overall shape resembles a miniature, head-closed hollow bottle stopper.

[0056] The cut 254 consists of a plurality of grooves extending outward from the center point of the paste outlet 251. These grooves naturally adhere to each other due to the elasticity of the material, ensuring a reliable seal at the paste outlet 251. In different embodiments, the number of grooves can be four to eight, evenly distributed around the center point of the cut 254 to ensure a symmetrical outlet is formed when the material is opened, allowing the paste to flow out evenly. The structure of the cut 254 utilizes the resilience of the elastic material. When the internal paste pressure increases, the pressure pushes the valve body portion separated by the grooves outward, forming an outlet channel for the paste. Once the internal pressure disappears, the elastic resilience of the material immediately causes the stretched portions to return to their original position, causing the cut 254 to close tightly again.

[0057] These grooves divide the paste outlet 251 into several deformable and reversible valves 255. Each valve 255 is a reversible three-dimensional elastic sheet structure surrounded by grooves. In the unpressurized, static state, the edges of all valves 255 are tightly fitted together, forming a sealed structure. During the pressing process of the paste pump, when an upward positive pressure is formed in the pre-discharge chamber 13, this pressure acts on the inner surface of the valve 255, causing it to flip outward and open, forming a polygonal star-shaped opening that allows the paste to flow smoothly out of the grooves.

[0058] In a preferred embodiment, the incision 254 may include two mutually perpendicular grooves that intersect at the center of the ointment outlet 251. These cross-shaped grooves divide the ointment outlet 251 into four functionally identical valve units 255. To further optimize its sealing and opening performance, the central region of each valve unit 255, away from the center of the groove intersection, may form a recess towards the interior of the neck 253 together with the adjacent neck 253 portion, such that the two sides of the recess form triangular arcuate segments.

[0059] In addition, to ensure the stable positioning of the first one-way valve 25 within the paste dispensing head 232, its outer periphery of the mating end 252 can extend outward to form an annular flange 256. During assembly, this flange 256 abuts against the first step on the inner wall of the longitudinal paste dispensing channel 2322 described above, thereby completing axial positioning.

[0060] Similar to the first one-way valve 25, referring to Figure 10, the second one-way valve 26 also includes a closed dispensing end 251, an open connecting end 252, and a neck 253 connecting the dispensing end 251 and the connecting end 252. The dispensing end 251 also has a central cut 254 that can be opened by the pressure of the ointment. This cut 254 is composed of a plurality of grooves extending outward from the center point. These grooves naturally fit together, keeping the dispensing end 251 closed. Similarly, in a preferred embodiment, there are four grooves, forming a cross-shaped cut 254. In another preferred embodiment, there are six grooves, forming an asterisk-shaped cut 254, i.e., in the shape of an asterisk (*).

[0061] The structure of the slit 254 utilizes the elastic recovery properties of the elastic valve body material itself. When the internal paste pressure increases and acts on the slit 254, the cut portion of the valve body is pushed outward, forming an outlet channel for the paste. Once the internal pressure disappears, the elastic recovery force of the material immediately causes the stretched parts to return to their original position, causing the slit 254 to close again. This automatic opening and closing mechanism not only achieves on-demand dispensing but, more importantly, forms a reliable barrier, effectively preventing contaminants such as external air, dust, or microorganisms from flowing back through the paste outlet channel between uses, thus contaminating the unused paste inside the container. Furthermore, this clean closing method also helps to cleanly cut off the paste after each extrusion, avoiding outlet residue or dripping.

[0062] Unlike the first one-way valve 25, in one embodiment, the outer surface of the paste-dispensing end 251 of the second one-way valve 26 is not a plane, but rather a smooth, outwardly convex arc surface. Furthermore, the outer periphery of the paste-dispensing end 251 of the second one-way valve 26 is connected to the outer wall of the neck 253 by a smooth, rounded transition area, rather than a sharp corner. This outwardly convex arc surface can be designed as part of a regular sphere, or, as needed, as a non-spherical parabola or ellipsoid; the radius of this rounded transition can also be set according to the requirements of material elasticity and stress dispersion to achieve an optimized transition effect.

[0063] The smooth transition between the curved surface and the rounded edge avoids stress concentration caused by sharp corners during repeated deformation of the valve body under pressure during opening and closing. In particular, it prevents stress from accumulating at the end of the groove and causing tearing, thus greatly improving the fatigue resistance and service life of the resilient valve body. Secondly, the dome-shaped geometry of the protruding curved surface helps guide the release of elastic potential energy, allowing the cut 254 to achieve a faster and more powerful rebound closing tendency after the internal pressure disappears, further enhancing the sealing reliability of the cut 254.

[0064] Additionally, refer to Figure 2 There are various ways to install the second one-way valve 26 at the transverse paste outlet channel 2321, as long as it can prevent the second one-way valve 26 from being pushed out of the transverse paste outlet channel 2321 during paste extrusion. As an example, the paste outlet head 232 has a paste outlet groove 2325 at the end of the transverse paste outlet channel 2321, and the shape of the paste outlet groove 2325 is adapted to the shape of the neck 253 of the second one-way valve 26. The dispensing end 251 is also equipped with a replacement seal 233, which includes a sealing tube wall 2331 and a sealing top plate 2332. The sealing tube wall 2331 is located on the bottom surface of the sealing top plate 2332 and is hollow to allow the ointment to pass through. A dispensing hole 2333, communicating with the interior of the sealing tube wall 2331, is provided through the sealing top plate 2332. The dispensing holes 2333 of different replacement seals 233 can be different. When it is necessary to adjust the dispensing shape and flow rate, the replacement seal 233 can be replaced. Different replacement seals 233, depending on the shape of the dispensing hole 2333, can be used for ointments of different viscosities, such as emulsions and liquid ointments. The sealing tube wall 2331 is inserted into and engaged with the dispensing groove 2325 to achieve mutual fixation. Meanwhile, the end of the sealing tube wall 2331 abuts against the paste outlet end 251 of the second one-way valve 26 to prevent the second one-way valve 26 from sliding in the paste outlet direction. The sealing top plate 2332 is located outside the transverse paste outlet channel 2321 and abuts against the outer surface of the paste outlet head 232.

[0065] Since the deformation of the elastic gourd tube 202 and the elastic bowl 201 is both axial in the shell, direct pressing will result in continuous force application over the longer stroke, making overall use more strenuous. Furthermore, the resistance to extruding the paste increases due to the placement of the first one-way valve 25 and the second one-way valve 26. Therefore, referring to... Figure 8In this embodiment, a lever 27 is added to the pumping unit 2. One end of the lever 27 is rotatably connected to the inner wall of the cap 4, the middle part overlaps the top surface of the elastic bowl 201, and the other end is lifted by the elastic bowl 201 and abuts against the bottom surface of the dispensing nozzle 232. That is to say, the pressing stroke is divided into two parts. The upper part still uses the dispensing nozzle 232 to directly press, so that the elastic gourd tube 202 deforms. The lower part of the stroke is the deformation stroke of the elastic bowl 201. The lever 27, through the three-end cooperation, forms a force-saving lever, thereby reducing the overall pressing force required.

[0066] In different embodiments, the shape of lever 27 can vary, as long as it can accommodate the aforementioned two ends and middle portion to form a force-saving lever. As an example, in one embodiment, lever 27 is arranged in a ring shape, and one side of the outer ring wall of lever 27 is fixedly connected to the inner side wall of cap 4 via a rotating shaft 271, which can be bent and deformed up and down; the top of elastic bowl 201 forms an overlapping platform 2012, the middle portion of lever 27 allows elastic gourd tube 202 to pass through, and the bottom surface of lever 27 abuts against the overlapping platform 2012; the end of lever 27 away from rotating shaft 271 protrudes upward and forms a pressing overlapping portion 272, which abuts against the bottom end of nozzle 232.

[0067] 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 direct drive lever type paste pump-out device characterized by, include: tube body(1); A cap (4) is detachably installed on the top of the tube body (1); A pumping unit (2) is disposed at the upper end of the tube body (1), and the tube body (1) has a storage cavity (14) for storing ointment below the pumping unit (2); The pumping unit (2) includes: An elastic bowl (201) is provided, the edge of which is fixedly connected to the inner wall of the tube (1). The elastic gourd tube (202) is installed on the top of the elastic bowl (201) and communicates with the inside of the elastic bowl (201); An end cap (22) is disposed below the elastic bowl (201). The elastic bowl (201) and the elastic hoist tube (202) work together to form a pre-discharge chamber (13) with the end cap (22). The end cap (22) is provided with a one-way through hole (221) connecting the storage chamber (14) and the pre-discharge chamber (13). The paste outlet (232) is fixedly connected to the top of the elastic gourd tube (202) and has a one-way paste outlet channel communicating with the pre-discharge chamber (13). The paste outlet (232) is slidably mounted on the cover (4). Lever (27), one end of which is rotatably connected to the inner wall of the cover (4), the middle part of which overlaps the top surface of the elastic bowl (201), and the other end of which is lifted by the elastic bowl (201) and abuts against the bottom surface of the grease nozzle (232).

2. The direct drive levered cream pump-out device according to claim 1, characterized in that It also includes a telescopic one-way valve (24), which is disposed at the one-way through hole (221) and is used to open when the elastic bowl (201) and / or the elastic gourd tube (202) are reset to allow the paste to flow unidirectionally from the storage chamber (14) into the pre-discharge chamber (13), and to close when the elastic bowl (201) and / or the elastic gourd tube (202) are deformed by pressure.

3. The direct drive levered cream pump-out device according to claim 1, characterized in that The lever (27) is arranged in a ring shape. One side of the outer ring wall of the lever (27) is fixedly connected to the inner side wall of the cover (4) by a rotating shaft (271). The rotating shaft (271) can be bent and deformed up and down. The top of the elastic bowl (201) forms an overlapping platform (2012). The middle part of the lever (27) is for the elastic gourd tube (202) to pass through, and the bottom surface of the lever (27) abuts against the overlapping platform (2012). The end of the lever (27) away from the rotating shaft (271) protrudes upward and forms a pressing overlapping part (272). The pressing overlapping part (272) abuts against the bottom end of the paste outlet (232).

4. The direct drive levered cream pump-out device according to claim 1, characterized in that It also includes a first one-way valve (25), which is located at the bottom of the one-way paste outlet channel and is used to open when the pre-discharge chamber (13) is compressed to allow the paste to be pumped out in one direction.

5. The direct drive levered cream pump-out device according to claim 4, characterized in that It also includes a second one-way valve (26), which is disposed at the top of the one-way paste outlet channel and is used to open when the pre-discharge chamber (13) is compressed to allow the paste to be pumped out in one direction.

6. The direct drive levered cream pump-out device according to claim 5, characterized in that The bottom of the dispensing head (232) has an outer tube (2324) and an inner tube (2323). The outer tube (2324) is slidably connected to the cap (4). The inner tube (2323) has a longitudinal dispensing channel (2322). The top of the dispensing head (232) has a transverse dispensing channel (2321). The transverse dispensing channel (2321) is connected to the longitudinal dispensing channel (2322). The first one-way valve (25) is installed in the longitudinal dispensing channel (2322), and the second one-way valve (26) is installed in the transverse dispensing channel (2321).

7. The direct-drive lever-type ointment pump device according to claim 6, characterized in that, The top end of the elastic gourd tube (202) is tapered into a tubular shape and extends outward, elastically fitting onto the outer wall of the inner tube (2323).

8. The direct drive levered cream pump-out device according to claim 6, characterized in that The dispensing nozzle (232) is detachably fitted with a replacement sealing nozzle (233) at the outlet of the transverse dispensing channel (2321), and the replacement sealing nozzle (233) is provided with a dispensing hole (2333).

9. The direct drive levered cream pump-out device according to claim 6, characterized in that The bottom end of the longitudinal paste dispensing channel (2322) has a first step and a second step from high to low. The first one-way valve (25) is installed in the longitudinal paste dispensing channel (2322) and has a flange (256) protruding outward from the bottom edge. The flange (256) abuts against the first step. A snap-fit ​​limiting member (234) is installed at the bottom end of the longitudinal paste dispensing channel (2322). The snap-fit ​​limiting member (234) is fixedly installed in the longitudinal paste dispensing channel (2322) and presses the flange (256) of the first one-way valve (25) against the first step.

10. The direct drive levered cream pump-out device according to claim 2, characterized in that A first limiting ring (11) is formed on the side wall of the tube body (1), and the edge of the end cap (22) abuts against the top of the first limiting ring (11); the telescopic one-way valve (24) includes a support ring (241), a plurality of elastic rotating arms (243) and an elastic valve plate (242). The support ring (241) is installed on the end cap (22) and fixed to the edge of the end cap (22). One end of the elastic rotating arm (243) is connected to the inner side wall of the support ring (241), and the other end bends and extends toward the outer side wall of the elastic valve plate (242) and is connected. A plurality of elastic rotating arms (243) are evenly arranged around the center of the elastic valve plate (242).

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