A new vacuum multi-configuration replaceable push dispenser

Abstract

The utility model discloses a novel vacuum multi-structure replaceable push type dispenser, including outer bottle, replaceable inner bag, liquid outlet, the liquid outlet is connected with one end of the inner bag through shoulder cover, air bag pressing structure is arranged in the other end of the inner bag, the air bag pressing structure is configured to produce a predetermined volume change when being pressed every time, and drive the material in the inner bag correspondingly to discharge a fixed dose. The utility model discloses through adopting air bag pressing structure, when being pressed, can make the cosmetic solution in the bottle be discharged quantitatively, cancel metal spring and pump core structure on one hand, save the cost and reduce the failure rate, on the other hand, through the volume of air bag pressing structure, can realize accurate quantitative liquid outlet.

Description

Technical Field

[0001] This utility model belongs to the field of packaging container technology, specifically relating to a novel vacuum multi-structure replaceable push-type dispenser. Background Technology

[0002] Cosmetics, especially liquid cosmetics such as perfumes and serums, are generally vacuum-packed in existing technologies to improve their airtightness during storage. For example, Chinese patent CN117678847A describes a multifunctional vacuum replacement dropper container for precise quantitative slow-drip liquid with multiple leak-proof features. This container creates a vacuum environment by setting a piston and sealing structure in the inner liner to reduce residue. It also uses a locking guide surface and a stop fitting surface to achieve press-to-leakage prevention. Furthermore, the replacement inner liner contains a one-way valve plate and a sealing column to prevent inverted leakage, thus forming a vacuum leak-proof container.

[0003] For example, Chinese patent CN222787234U describes a press-type replacement vacuum bottle with a press sleeve that can move up and down at the bottom. When pressed, the inner bottle and pump core assembly move upward to achieve liquid delivery. The liquid outlet is located at the top of the shoulder sleeve and does not require a press cap. The shoulder sleeve and outer bottle adopt a snap-fit ​​structure, which allows the inner bottle and pump core assembly to be removed and replaced as a whole from the first opening at the top, improving the convenience of replacement.

[0004] However, both CN117678847A and CN222787234U require structures such as valve cores and elastic components like springs, resulting in a large number of parts in the entire container, higher production costs, and a tendency to be damaged during use, affecting normal operation.

[0005] Therefore, in order to simplify the structure and number of parts of cosmetic containers, it is necessary to develop a new type of vacuum multi-structure replaceable pusher dispenser. Utility Model Content

[0006] The purpose of this invention is to propose a novel vacuum multi-structure replaceable pusher dispenser to solve the problems in the prior art.

[0007] Therefore, this utility model provides a novel vacuum multi-structure replaceable pusher dispenser, comprising: outer bottle; Replaceable inner liner; A liquid outlet, which is connected to one end of the inner liner via a shoulder sleeve; An airbag pressing structure is disposed at the other end of the inner liner. The airbag pressing structure is configured to produce a predetermined volume change each time it is pressed, and to cause the material in the inner liner to be discharged in a fixed dose accordingly.

[0008] In one embodiment, a retention valve is provided between the shoulder sleeve and the inner liner.

[0009] In one embodiment, the airbag pressing structure is fixed to the inside of the inner liner by a bottom cover, and a piston is provided inside the inner liner; The airbag pressing structure is provided with a pressing cap on its exterior. After the pressing cap is unlocked by rotation, it can move along the axial direction of the airbag pressing structure.

[0010] In one embodiment, the airbag pressing structure is a dual-airbag structure, which includes an inner airbag and an outer airbag.

[0011] In one embodiment, a suction cup is provided at the end of the inner airbag that is in contact with the bottom cover.

[0012] In one embodiment, the inner airbag and its connected bottom cover are both arc-shaped structures, and a baffle is provided between the inner airbag and the outer airbag.

[0013] In one embodiment, the external airbag is fitted to the button cap, and the inner wall of the button cap is provided with an exhaust groove.

[0014] In one embodiment, the airbag pressing structure is a hollow airbag, and the hollow airbag is a bellows structure with a variable diameter.

[0015] In one embodiment, one end of the airbag pressing structure is fixed to the bottom cover, and the other end of the airbag pressing structure is attached to the pressing cap. A vent hole is provided at the center of the pressing cap, and a one-way valve core is provided in the vent hole.

[0016] In one embodiment, one end of the airbag pressing structure is connected to the inner liner, and the other end of the airbag pressing structure is attached to the pressing cap.

[0017] In one embodiment, an inner cover is included, the liquid outlet is connected to the inner cover via a cap, the inner cover is threadedly connected to the inner liner, and a retention valve is connected to the other end of the inner cover; The bottom of the inner liner is provided with a bottom cover, and the bottom of the bottom cover is provided with an airbag pressing structure, which is connected to the inner wall of the outer bottle.

[0018] In one embodiment, a filter structure is provided between the liquid outlet and the inner liner.

[0019] In one embodiment, the inner wall of the cap is provided with a guide limiting groove, and the outer wall of the inner cover is provided with a guide limiting point.

[0020] In one embodiment, the retention valve includes a hollow cylinder with one end open, and an opening is provided at the other end of the hollow cylinder, and a filter cloth is disposed in the opening.

[0021] In one embodiment, the retention valve includes a hollow cylinder with one end open, and a one-way valve is provided at the other end of the hollow cylinder.

[0022] In one embodiment, the retention valve includes a hollow cylinder open at one end, and a baffle plate is provided at the other end of the hollow cylinder.

[0023] In one embodiment, the retention valve includes a hollow cylinder with one end open, and the other end of the hollow cylinder has several small holes.

[0024] In one embodiment, the retention valve includes a hollow cylinder with one end open, and the other end of the hollow cylinder is a soft rubber molding structure with multiple slits cut into it. When the soft rubber molding structure is under stress, the slits open to form a channel.

[0025] Beneficial effects: This invention provides a novel vacuum multi-structure replaceable push-type dispenser. By adopting an airbag pressing structure, the cosmetic solution in the bottle can be quantitatively discharged when it is pressed. On the one hand, it eliminates the need for metal springs and pump core structures, saving costs and reducing the failure rate. On the other hand, by controlling the volume of the airbag pressing structure, precise quantitative dispensing can be achieved. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram before use in Embodiment 1 of this utility model.

[0028] Figure 2 This is a schematic diagram before use in Embodiment 1 of this utility model.

[0029] Figure 3 This is a schematic diagram showing the application of this utility model in Embodiment 1.

[0030] Figure 4 This is a schematic diagram showing the application of this utility model in Embodiment 1.

[0031] Figure 5This is a schematic diagram of the exhaust groove on the inner wall of the cap in Embodiment 1 of this utility model.

[0032] Figure 6 This is a schematic diagram of the airbag pressing structure in Embodiment 1 of this utility model.

[0033] Figure 7 This is a cross-sectional view of the airbag pressing structure and a partial enlarged view of the suction cup in Embodiment 1 of this utility model.

[0034] Figure 8 This is an exploded view of Embodiment 1 of this utility model.

[0035] Figure 9 This is a schematic diagram before use in Embodiment 2 of this utility model.

[0036] Figure 10 This is a schematic diagram before use in Embodiment 2 of this utility model.

[0037] Figure 11 This is a schematic diagram showing the application of this utility model in Embodiment 2.

[0038] Figure 12 This is a schematic diagram showing the application of this utility model in Embodiment 2.

[0039] Figure 13 This is a schematic diagram of the airbag pressing structure in Embodiment 2 of this utility model.

[0040] Figure 14 This is a cross-sectional view of the airbag pressing structure in Embodiment 2 of this utility model.

[0041] Figure 15 This is an exploded view of Embodiment 2 of this utility model.

[0042] Figure 16 This is a schematic diagram before use in Embodiment 3 of this utility model.

[0043] Figure 17 This is a schematic diagram before use in Embodiment 3 of this utility model.

[0044] Figure 18 This is a schematic diagram showing the application of this utility model in Embodiment 3.

[0045] Figure 19 This is a schematic diagram showing the application of this utility model in Embodiment 3.

[0046] Figure 20 This is a schematic diagram of the airbag pressing structure in Embodiment 3 of this utility model.

[0047] Figure 21 This is a cross-sectional view of the airbag pressing structure in Embodiment 3 of this utility model.

[0048] Figure 22 This is an exploded view of Embodiment 3 of this utility model.

[0049] Figure 23 This is a schematic diagram before use in Embodiment 4 of this utility model.

[0050] Figure 24 This is a schematic diagram before use in Embodiment 4 of this utility model.

[0051] Figure 25 This is a schematic diagram showing the application of this utility model in Embodiment 4.

[0052] Figure 26 This is a schematic diagram showing the application of this utility model in Embodiment 4.

[0053] Figure 27 This is an exploded view of the invention after its use in Embodiment 4.

[0054] Figure 28 This is a schematic diagram before use in Embodiment 5 of this utility model.

[0055] Figure 29 This is a schematic diagram before use in Embodiment 5 of this utility model.

[0056] Figure 30 This is a schematic diagram showing the application of this utility model in Embodiment 5.

[0057] Figure 31 This is a schematic diagram showing the application of this utility model in Embodiment 5.

[0058] Figure 32 This is a schematic diagram showing the application of this utility model in Embodiment 5.

[0059] Figure 33 This is a schematic diagram of the inner wall of the cap in Embodiment 5 of this utility model.

[0060] Figure 34 This is a schematic diagram of the inner cover in Embodiment 5 of this utility model.

[0061] Figure 35 This is an exploded view of Embodiment 5 of this utility model.

[0062] Figure 36 This is a schematic diagram of one embodiment of the retention valve in Embodiment Six of this utility model.

[0063] Figure 37 This is a schematic diagram of one embodiment of the retention valve in Embodiment Six of this utility model.

[0064] Figure 38 This is a schematic diagram of one embodiment of the retention valve in Embodiment Six of this utility model.

[0065] Figure 39 This is a schematic diagram of one embodiment of the retention valve in Embodiment Six of this utility model.

[0066] Figure 40 This is a schematic diagram of one embodiment of the retention valve in Embodiment Six of this utility model.

[0067] Figure 41 These are schematic diagrams illustrating the use of Embodiments 1 to 4 of this utility model.

[0068] Figure 42 This is a schematic diagram illustrating the use of Embodiment 5 of this utility model.

[0069] In the diagram: 1. Outer bottle; 2. Inner liner; 3. Dispensing nozzle; 4. Airbag pressing structure; 401. Inner airbag; 402. Outer airbag; 403. Suction cup; 404. Baffle; 405. Cavity airbag; 5. Shoulder sleeve; 6. Retention valve; 601. Valve body; 602. Opening; 603. Filter cloth; 604. One-way valve; 605. Barrier plate; 606. Small hole; 607. Gap; 7. Bottom cover; 8. Piston; 9. Press cap; 901. Vent hole; 902. Exhaust groove; 10. One-way valve core; 11. Outer cover; 12. Inner cover; 13. Guide limiting groove; 14. Guide limiting locking point; 15. Filter ring; 16. Mesh. Detailed Implementation

[0070] The following detailed description of preferred embodiments of the present invention, along with the included examples, will make the content of the present invention more readily understood. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. In case of any conflict, the definitions in this specification shall prevail.

[0071] This utility model provides a novel vacuum multi-structure replaceable push-type dispenser, which solves the problem of existing essence bottles using multiple structures such as pump core structures and metal springs, resulting in a large number of internal parts, high manufacturing costs, and susceptibility to damage.

[0072] The technical concept of this utility model lies in the use of an airbag pressing structure, which allows the cosmetic solution in the bottle to be quantitatively discharged when it is pressed. On the one hand, it eliminates the need for a metal spring and pump core structure, saving costs and reducing the failure rate. On the other hand, by controlling the volume of the airbag pressing structure, precise quantitative dispensing can be achieved.

[0073] Example 1: like Figure 1-8 As shown, a novel vacuum multi-structure replaceable pusher dispenser includes: outer bottle 1; A replaceable inner liner 2; both the outer bottle 1 and the inner liner 2 can be made of plastic. One end of the inner liner 2 is threaded, which can be connected to the shoulder sleeve 5. When the inner liner 2 needs to be replaced, it can be removed by rotating the screw and replaced with a new inner liner 2.

[0074] The liquid outlet 3 is connected to one end of the inner liner 2 via a shoulder sleeve 5; An airbag pressing structure 4 is located at the other end of the inner liner 2. The airbag pressing structure 4 is configured to generate a predetermined volume change each time it is pressed, thereby causing a fixed amount of material to be expelled from the inner liner 2, thus achieving precise liquid dispensing. Specifically, the volume of the airbag within the airbag pressing structure 4 is constant, and the stroke of the airbag pressing structure 4 during a single press is also fixed. Therefore, the amount of material expelled during pressing is also constant, thus achieving precise and quantitative liquid dispensing.

[0075] In this embodiment, a retention valve 6 is provided between the shoulder sleeve 5 and the inner liner 2. By providing the retention valve 6, liquid can be prevented from overflowing or the amount of liquid overflowing can be kept very small when the inner liner 2 is replaced.

[0076] In this embodiment, the airbag pressing structure 4 is fixed inside the inner liner 2 by the bottom cover 7, and a piston 8 is provided inside the inner liner 2. A pressing cap 9 is provided outside the airbag pressing structure 4. After the pressing cap 9 is rotated to unlock, it can move along the axial direction of the airbag pressing structure 4, thereby enabling the piston 8 to move after the airbag pressing structure 4 is pressed, thereby realizing the liquid discharge from the inner liner 2.

[0077] In this embodiment, the airbag pressing structure 4 includes an outer airbag 402 and an inner airbag 401. A suction cup 403 is provided at the fitting end of the inner airbag 401 and the bottom cover 7. The bottom cover 7 has a planar structure. When the airbag pressing structure 4 is pressed, the outer airbag 402 and the inner airbag 401 are pressed simultaneously. The outer airbag 402 provides support for the bottom suction cup 403, making the bottom suction cup 403 contact the bottom cover 7 more firmly, and at the same time preventing the inner airbag 401 from collapsing and failing to provide power. The inner airbag 401 provides power for the piston 8 and also provides power for the rebound of the cap 9.

[0078] like Figure 41As shown, its working principle is as follows: Before use, open the outer cover 11, rotate the button 9 to unlock it, block the center hole of the button 9 with your hand and press the button 9. The double airbags are compressed, and the suction cup 403 at the bottom of the inner airbag 401 is firmly attached to the flat bottom cover 7, ensuring that the gas inside the airbag does not leak. The air pressure generated by the inner airbag 401 acts on the piston 8 in the inner liner 2, pushing the piston 8 to move towards the liquid outlet 3, driving the material in the inner liner 2 to be discharged from the liquid outlet 3 through the retention valve 6 and the shoulder sleeve 5. After releasing the button 9, the outer airbag 402 prevents the inner airbag 401 from collapsing due to its own support. At the same time, the exhaust groove 902 on the inner wall of the button 9 breaks the vacuum environment between the outer airbag 402 and the button 9. External gas enters the inner airbag 401 from the center hole and enters the outer airbag 402 from the exhaust groove 902. The inner airbag 401 and the outer airbag 402 rebound together to restore their original shape, completing one liquid discharge cycle.

[0079] The above technical solution eliminates the need for traditional metal springs and pump core structures, significantly reducing the number of parts and lowering manufacturing costs and failure rates. Meanwhile, the suction cup 403 sealing structure ensures efficient air pressure utilization, the exhaust groove 902 solves the problem of airbag rebound, and the retention valve 6 effectively improves the ease of replacing the inner liner 2, achieving both quantitative liquid dispensing and efficient sealing.

[0080] Example 2: like Figure 9-15 As shown, unlike Embodiment 1, in this embodiment, both the inner airbag 401 and its connected bottom cover 7 are arc-shaped structures, and a baffle 404 is provided between the inner airbag 401 and the outer airbag 402. The bottom of the inner airbag 401 is a bowl-shaped wrapping structure, and the bottom cover 7 is also designed as a bowl, which perfectly wraps the bowl-shaped structure at the bottom of the airbag, while an exhaust groove 902 is still provided on the inner wall of the cap 9.

[0081] like Figure 41 As shown, its operating principle is as follows: After opening the outer cover 11 and rotating the button 9 to unlock, the center hole of the button 9 is blocked and the button 9 is pressed. The double airbags are compressed, and the air pressure inside the airbags increases. Under the action of air pressure, the bowl-shaped structure at the bottom of the inner airbag 401 tightly fits the inner sidewall of the bowl-shaped bottom cover 7, forming a reliable seal to prevent gas from leaking from the bottom of the airbag. The air pressure pushes the piston 8 inside the inner liner 2 to move, and the material is discharged through the liquid outlet 3. When the button 9 is released, the outer airbag 402 supports the inner airbag 401 to prevent it from collapsing. External gas enters the inner airbag 401 through the center hole and enters the outer airbag 402 through the exhaust groove 902. The inner airbag 401 and the outer airbag 402 rebound together to restore their original shape, completing one liquid discharge cycle.

[0082] Compared to the suction cup 403 structure, the bowl-shaped wrapping structure has a larger sealing contact area and stronger air pressure sealing stability. It can maintain a good sealing effect even after multiple presses. At the same time, it continues the design advantages of no metal spring and fewer parts, while improving structural durability. The retention valve 6 still ensures the leak-proof effect when the inner liner 2 is replaced. It is suitable for liquid materials with higher requirements for sealing reliability.

[0083] Example 3: like Figure 16-22 As shown, unlike the above embodiments, in this embodiment, the airbag pressing structure 4 is a hollow airbag 405, which is a bellows structure with a variable diameter. Specifically, the airbag pressing structure 4 is a single airbag design, with a one-way valve core 10 provided on the inner side of the airbag head, a gourd-shaped structure in the middle of the airbag, and a bowl-shaped wrapping structure at the bottom, the same as in Embodiment 2. The bottom cover 7 is also bowl-shaped.

[0084] like Figure 41 As shown, its working principle is as follows: When in use, open the outer cover 11, rotate the button 9 to unlock it, and press the button 9 directly without blocking the center hole of the button 9. The airbag is compressed, and the internal air pressure increases. Under the action of air pressure, the one-way valve core 10 automatically blocks the center hole of the button 9, preventing the gas in the airbag from leaking out. The air pressure drives the piston 8 in the inner liner 2 to move towards the liquid outlet 3, and the material is discharged from the liquid outlet 3 through the retention valve 6 and the shoulder sleeve 5. After releasing the button 9, the airbag rebounds due to its own elasticity, forming a negative pressure inside. Under the action of the air pressure difference, the external gas pushes open the one-way valve core 10 and enters the airbag, and the airbag returns to its initial shape.

[0085] The above technical solution simplifies the operation process by incorporating a one-way valve core 10, eliminating the need for manual plugging and improving ease of use. The gourd-shaped airbag structure precisely controls the volume change with each press, achieving a more stable, fixed-dose dispensing, meeting the quantitative dispensing requirements of cosmetics (such as perfumes). The bottom bowl-shaped structure ensures a tight seal, eliminating the need for a metal spring and pump core, further reducing component costs and failure rates. The retention valve 6 still functions to prevent leakage when replacing the inner tank 2.

[0086] Example 4: like Figure 23-27 As shown, unlike the above embodiments, in this embodiment, one end of the airbag pressing structure 4 is connected to the inner liner 2, and the other end of the airbag pressing structure 4 is attached to the pressing cap 9. Specifically, the airbag pressing structure 4 and the inner liner 2 are an integral structure without an additional independent piston 8 structure. In particular, the airbag inner liner 2 itself has both the elasticity of the airbag and the storage function of the inner liner 2.

[0087] like Figure 41As shown, its working principle is as follows: After opening the outer cover 11 and rotating the button 9 to unlock, pressing the button 9 directly compresses the integrated structure of the airbag inner liner 2, reducing the internal volume and increasing the air pressure, which drives the internal material to be discharged from the liquid outlet 3 through the retention valve 6 and the shoulder sleeve 5; after releasing the button 9, the airbag inner liner 2 rebounds due to its own elasticity, and the volume is restored, completing one liquid discharge.

[0088] By employing the above technical solution, while maintaining the replaceability of the inner liner 2, the airbag and inner liner 2 are integrated into a single structure, minimizing the number of parts, greatly simplifying the production and assembly process, and reducing manufacturing costs. The absence of an independent piston 8 reduces structural gaps, further reducing the risk of material residue and leakage. The retention valve 6 ensures leak-proof performance when replacing the integrated inner liner 2, making it suitable for scenarios with extremely high requirements for cost control and structural simplification.

[0089] Example 5: like Figure 28-35 As shown, unlike the above embodiments, this embodiment is a reverse-use structure. The dispenser includes an outer bottle 1, a replaceable inner liner 2, and a dispensing nozzle 3 located at the top (original bottom position) of the inner liner 2. The top of the inner liner 2 is also provided with an inner cover 12. The dispensing nozzle 3 is connected to the inner cover 12 via a push cap 9. The inner cover 12 is threadedly connected to the inner liner 2, and the other end of the inner cover 12 is connected to a retention valve 6. The bottom (original top position) of the inner liner 2 is provided with a bottom cover 7, and the bottom of the bottom cover 7 is provided with an airbag pressing structure 4. The airbag is connected to the inner wall of the outer bottle 1. It should be noted that in this embodiment, the airbag pressing structure 4 can be a double airbag or a single airbag, which can be set according to specific needs.

[0090] In some embodiments, a filter structure, such as filter cloth 603, turbulence-dispersing mesh 16, or injection-molded filter screen, is provided at the liquid outlet 3 to prevent the spraying of viscous or slurry materials.

[0091] In some embodiments, a guide limiting groove 13 is provided on the inner side of the shoulder sleeve 5, and a guide limiting point 14 is provided on the outer wall of the inner cover 12. The pressing stroke of the button 9 can be limited and quantitatively measured by the cooperation of the guide limiting groove 13 and the guide limiting point 14.

[0092] like Figure 42 As shown, its working principle is as follows: After assembly, the cap 9, inner cover 12, filter structure, inner liner 2, and bottom cover 7 are relatively fixed. When in use, the top cap 9 is pressed directly, the bottom airbag is compressed, and the generated air pressure pushes the piston 8 in the inner liner 2 to move upward. The material in the inner liner 2 is discharged from the outlet 3 through the retention valve 6, inner cover 12, and filter structure. During the pressing process, the guide limit locking point 14 on the outer wall of the inner cover 12 moves along the guide limit groove 13 on the inner side of the shoulder sleeve 5 to limit the pressing stroke of the cap 9 and avoid excessive pressing to prevent damage to the structure. After the cap 9 is released, the bottom airbag rebounds elastically, causing the cap 9 and related components to reset.

[0093] Through the above technical solutions, the reverse structure design changes the traditional bottom-pressing method, and the front pump head operation is more in line with user habits. The filtration structure solves the problem of spraying thin and thick materials, improving the user experience. The cooperation between the guide limit groove 13 and the locking point ensures structural stability and avoids excessive wear; the metal spring and traditional pump core are eliminated, reducing the number of parts, while the design of the retention valve 6 and the replaceable inner liner 2 takes into account the requirements of leak prevention and environmental recycling, making it suitable for cosmetic packaging with high requirements for ease of operation and user experience.

[0094] Example 6: In the new vacuum multi-structure replaceable push-type distributor, the retention valve 6 is installed between the shoulder sleeve 5 and the replaceable inner liner 2. When replacing the inner liner 2, it allows the inner liner 2 to be removed at any angle, effectively preventing a large amount of residual liquid in the inner liner 2 from overflowing. Only a very small amount of leakage is possible, avoiding liquid waste and environmental pollution. At the same time, it does not affect the smooth discharge of materials when the distributor is in normal use, and adapts to the liquid discharge requirements of different airbag pressing structures 4.

[0095] Specifically, such as Figure 36 As shown, in some embodiments, the main body of the retention valve 6 is a hollow cylinder with one open end (the open end is connected to the inner liner 2, and the closed end faces the shoulder sleeve 5). The closed end of the hollow cylinder has an opening 602, and a filter cloth 603 (such as fiber filter cloth 603 or non-woven filter cloth 603) is fixedly installed inside the opening 602.

[0096] When the airbag pressing structure 4 is pressed, the piston 8 inside the inner liner 2 pushes the material towards the liquid outlet 3. The material enters the retention valve 6 through the open end of the hollow cylinder, passes through the filter cloth 603 at the opening 602 at the closed end (filtering out tiny impurities in the material to ensure the purity of the discharged material), and is then discharged from the liquid outlet 3 through the shoulder sleeve 5. The filter cloth 603 does not obstruct the normal flow of the material.

[0097] When the shoulder sleeve 5 is removed and the inner liner 2 is separated, the filter cloth 603 can prevent the residual liquid in the inner liner 2 from quickly passing through the opening 602. Only a very small amount of liquid may slightly seep out along the fiber gaps 607 of the filter cloth 603, thus avoiding a large amount of leakage.

[0098] In some embodiments, such as Figure 37 As shown, the retention valve 6 is a hollow cylinder with one open end. Its open end is connected to the inner liner 2, and its closed end is connected to the shoulder sleeve 5. The closed end of the hollow cylinder integrates a one-way valve 604. The one-way valve 604 only allows material to flow from the inner liner 2 to the shoulder sleeve 5, and shuts off in the reverse direction.

[0099] The pressure generated by the airbag pushes the material towards the shoulder sleeve 5. The material pressure opens the valve core of the one-way valve 604, so that the one-way valve 604 is in the open state. The material smoothly passes through the retention valve 6 and enters the shoulder sleeve 5 and is discharged through the liquid outlet 3.

[0100] After separating the shoulder sleeve 5 from the inner liner 2, the residual liquid inside the inner liner 2 has no outward pressure. The one-way valve 604 valve core closes under its own structural action, blocking the flow of residual liquid to the outside and achieving leak prevention.

[0101] In some embodiments, such as Figure 38 As shown, the retention valve 6 is a hollow cylinder with one open end connected to the inner liner 2, and the closed end is close to the shoulder sleeve 5. A barrier plate 605 is fixedly installed at the closed end of the hollow cylinder. The material can be elastic plastic or soft rubber, which has a certain blocking effect and can be pushed open by the material pressure.

[0102] The airbag presses to drive the material to generate pressure. When the pressure is greater than the blocking force of the barrier 605, the material pushes open the barrier 605, forming a flow gap, and smoothly passes through the retention valve 6 into the shoulder sleeve 5, ensuring smooth liquid discharge.

[0103] After removing the shoulder sleeve 5, the pressure of the residual liquid inside the inner liner 2 disappears, and the barrier 605 returns to its initial state and fits the closed end, directly blocking the residual liquid from flowing out. Only a very small amount of seepage may occur due to the gap between the barrier 605 and the sealing plate.

[0104] In some embodiments, such as Figure 39 As shown, the retention valve 6 is a hollow cylinder with one end open (the open end is connected to the inner liner 2, and the closed end faces the shoulder sleeve 5). The closed end of the hollow cylinder does not have a large opening 602, but instead has several small holes 606 with a diameter of 606 evenly distributed.

[0105] The airbag presses continuously pressurize the material inside the inner liner 2, allowing the material to flow slowly and steadily into the shoulder sleeve 5 through several small holes 606. Although it has a certain flow-limiting effect, it does not affect the fixed dose of liquid output and is suitable for materials with moderate viscosity.

[0106] After separating the inner liner 2 from the shoulder sleeve 5, the residual liquid in the inner liner 2 is difficult to flow out quickly due to the extremely small diameter of the small hole 606 and the influence of surface tension and gravity. Only a very small amount of liquid slowly seeps out along the small hole 606, thus preventing leakage.

[0107] In some embodiments, such as Figure 40 As shown, the retention valve 6 is a hollow cylinder with one end open, which is connected to the inner liner 2. The other end of the hollow cylinder is a soft rubber molding structure. The soft rubber material has good elasticity and sealing properties, and multiple small gaps 607 are cut on the soft rubber molding structure. In the initial state, the gaps 607 are closed.

[0108] The airbag press drives the material to flow towards the retention valve 6. The material pressure acts on the soft rubber molding structure, causing the small cut gap 607 to open and form a material flow channel. The material enters the shoulder sleeve 5 and the liquid outlet 3 through the channel and is discharged. After the press cap 9 is released, the material pressure disappears, and the elasticity of the soft rubber causes the gap 607 to reset and close.

[0109] When the shoulder sleeve 5 is removed, the residual liquid inside the inner liner 2 does not have enough pressure to open the soft rubber gap 607. The gap 607 remains closed, completely blocking the residual liquid from flowing out. The leak-proof effect is significant and it is suitable for liquid materials with high leak-proof requirements (such as perfume).

[0110] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel vacuum multi-structure replaceable pusher dispenser, characterized in that, include: outer bottle; Replaceable inner liner; A liquid outlet, which is connected to one end of the inner liner via a shoulder sleeve; An airbag pressing structure is disposed at the other end of the inner liner. The airbag pressing structure is configured to produce a predetermined volume change each time it is pressed, and to cause the material in the inner liner to be discharged in a fixed dose accordingly.

2. The novel vacuum multi-structure replaceable pusher dispenser according to claim 1, characterized in that, A retention valve is provided between the shoulder sleeve and the inner liner.

3. The novel vacuum multi-structure replaceable pusher dispenser according to claim 2, characterized in that, The airbag pressing structure is fixed to the inside of the inner liner by the bottom cover, and a piston is provided inside the inner liner; The airbag pressing structure is provided with a pressing cap on its exterior. After the pressing cap is unlocked by rotation, it can move along the axial direction of the airbag pressing structure.

4. The novel vacuum multi-structure replaceable pusher dispenser according to claim 3, characterized in that, The airbag pressing structure is a dual-airbag structure, which includes an inner airbag and an outer airbag.

5. The novel vacuum multi-structure replaceable pusher dispenser according to claim 4, characterized in that, The end of the inner airbag that fits into the bottom cover is provided with a suction cup.

6. The novel vacuum multi-structure replaceable pusher dispenser according to claim 4, characterized in that, The inner airbag and its connected bottom cover are both arc-shaped structures, and a baffle is provided between the inner airbag and the outer airbag.

7. The novel vacuum multi-structure replaceable pusher dispenser according to claim 4, characterized in that, The external airbag fits into the cap, and the inner wall of the cap has an exhaust groove.

8. The novel vacuum multi-structure replaceable pusher dispenser according to claim 3, characterized in that, The airbag pressing structure is a hollow airbag, and the hollow airbag is a corrugated tube structure with a variable diameter.

9. The novel vacuum multi-structure replaceable pusher dispenser according to claim 8, characterized in that, One end of the airbag pressing structure is fixed to the bottom cover, and the other end of the airbag pressing structure is attached to the pressing cap. A vent hole is provided at the center of the pressing cap, and a one-way valve core is provided in the vent hole.

10. The novel vacuum multi-structure replaceable pusher dispenser according to claim 8, characterized in that, One end of the airbag pressing structure is connected to the inner liner, and the other end of the airbag pressing structure is attached to the pressing cap.

11. The novel vacuum multi-structure replaceable pusher dispenser according to claim 1, characterized in that, The product includes an inner cover, the liquid outlet is connected to the inner cover via a push cap, the inner cover is threadedly connected to the inner liner, and a retention valve is connected to the other end of the inner cover. The bottom of the inner liner is provided with a bottom cover, and the bottom of the bottom cover is provided with an airbag pressing structure, which is connected to the inner wall of the outer bottle.

12. The novel vacuum multi-structure replaceable pusher dispenser according to claim 11, characterized in that, A filter structure is provided between the liquid outlet and the inner liner.

13. The novel vacuum multi-structure replaceable pusher dispenser according to claim 11, characterized in that, The inner wall of the cap is provided with a guide limiting groove, and the outer wall of the inner cover is provided with a guide limiting locking point.

14. The novel vacuum multi-structure replaceable pusher dispenser according to claim 2, characterized in that, The retention valve includes a hollow cylinder with one end open, and an opening is provided at the other end of the hollow cylinder, and a filter cloth is provided in the opening.

15. The novel vacuum multi-structure replaceable pusher dispenser according to claim 2, characterized in that, The retention valve includes a hollow cylinder with one end open, and a one-way valve is provided at the other end of the hollow cylinder.

16. The novel vacuum multi-structure replaceable pusher dispenser according to claim 2, characterized in that, The retention valve includes a hollow cylinder with one end open, and a barrier plate is provided at the other end of the hollow cylinder.

17. The novel vacuum multi-structure replaceable pusher dispenser according to claim 2, characterized in that, The retention valve includes a hollow cylinder with one end open, and the other end of the hollow cylinder has several small holes.

18. The novel vacuum multi-structure replaceable pusher dispenser according to claim 2, characterized in that, The retention valve includes a hollow cylinder with one end open, and the other end of the hollow cylinder is a soft rubber molding structure with multiple slits cut into it. When the soft rubber molding structure is under stress, the slits open to form a channel.

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