Vacuum flask structure

Abstract

The utility model discloses a vacuum bottle structure, this structure includes bottle body base, lower piston body, shoulder sleeve, valve plug, middle connecting piece, upper piston body, lower gland, upper gland, bottle lid and the like spare, through the up-and-down movement of lower piston body and upper piston body, realize the volume change of placing cavity and storage chamber, and realize the extrusion and supplement of material body in the pressing and releasing process in conjunction with the check valve effect of valve plug. The utility model adopts all plastic structure, and easy to whole recycling has the advantages such as compact structure, good sealing, smooth material taking, internal air pressure balance.

Description

Technical Field

[0001] This utility model relates to the field of packaging container technology, specifically to a vacuum bottle structure. Background Technology

[0002] Vacuum bottles are widely used in cosmetic packaging, using an internal piston and pressure changes to extrude materials (such as cushion foundation and BB cream). Existing vacuum bottle structures typically have the following shortcomings: First, traditional vacuum bottles often use metal components (such as springs) in their internal structure, requiring separation of the metal from the plastic components during recycling, which is inconvenient; second, poor sealing can easily lead to leakage or contamination of the material; third, poor internal pressure balance results in uneven material dispensing, affecting the user experience; and fourth, some designs result in uneven material dispensing, impacting consumer usability. Therefore, a new vacuum bottle structure has been designed to address these issues.

[0003] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this utility model and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this utility model. Utility Model Content

[0004] To overcome the shortcomings of the prior art, the purpose of this utility model is to provide a vacuum bottle structure.

[0005] To achieve the above and other related objectives, the technical solution provided by this utility model is: a vacuum bottle structure, including a bottle base, a lower piston that can move up and down is provided inside the bottle base, a shoulder sleeve is provided above the lower piston, and the upper edge of the shoulder sleeve abuts against the upper part of the bottle base. The bottle base, the lower piston and the shoulder sleeve together form a placement cavity that can accommodate the material. The shoulder sleeve has a material passage in the middle, a valve plug is provided above the material passage, a middle connector is provided above the valve plug, an upper piston body that can move up and down is sleeved on the outside of the middle connector, a lower pressure cover is provided above the upper piston body, the upper piston body and the lower pressure cover are connected through the middle connector, and the shoulder sleeve, upper piston body, valve plug and middle connector together form a material storage cavity that can accommodate material. An upper pressure cap is provided above the lower pressure cap, a material distribution plate is provided in the middle of the upper pressure cap, a bottle cap is provided above the upper pressure cap, the bottle cap covers the bottle body base, and a discharge membrane is provided in the middle of the bottle cap. A retaining sleeve is connected to the lower part of the lower pressure cover. The inner edge of the retaining sleeve abuts against the upper piston body, and the retaining sleeve is engaged with the shoulder sleeve. A pressure sleeve is fixedly connected to the lower part of the upper pressure cover. The pressure sleeve is located above the shoulder sleeve and outside the retaining sleeve.

[0006] This solution achieves material storage and quantitative extrusion by setting up a placement chamber and a storage chamber. Its structure is simple and compact, making it not only easy to operate but also convenient for overall recycling.

[0007] Furthermore, the outer side of the material passage of the shoulder sleeve is provided with a first stop, a second stop, and a third stop perpendicular to the bottom surface of the shoulder sleeve, from the inside to the outside. The valve plug is located inside the first stop, and the lower piston body and the middle connecting member are both located inside the second stop. The ferrule is engaged with the second and third stops. The inside of the shoulder sleeve is provided with a first step, a second step, and a third step, from the outside to the inside. The second stop is located on the third step, and the third stop is located on the inner edge of the third step. This design, through multi-level stop and step design, ensures accurate positioning of each component and improves sealing and stability.

[0008] Furthermore, the valve plug includes a baffle plate disposed in its central part, the diameter of which is larger than the diameter of the material passage; the outer side of the baffle plate is provided with a hollow structure. In this solution, the baffle plate structure can prevent material backflow, while the hollow structure allows material to pass through, thus jointly realizing the one-way valve function.

[0009] Furthermore, the inner bottom surface of the lower piston body is provided with a recessed first countersunk platform. The lower piston body includes a first sidewall and a second sidewall from the outside to the inside. The upper and lower ends of the first sidewall are both bent outwards and abut against the inner sidewall of the bottle base. In this design, the bent sidewall structure can maintain good sealing during movement, ensuring that there is no leakage when the lower piston body moves up and down.

[0010] Furthermore, the inner bottom surface of the bottle base is provided with a recessed second countersunk platform, which is vertically corresponding to the first countersunk platform; a limiting ring is provided on the inner bottom surface of the bottle base near its inner sidewall, the limiting ring being located between the first sidewall and the second sidewall; a retaining edge is provided on the outer sidewall of the bottle base, which abuts against the outer sidewall of the bottle cap, and a sealing ring is provided between the retaining edge and the bottle cap, the sealing ring being fitted onto the upper end of the retaining edge; an exhaust hole is provided at the lower end of the bottle base. In this design, the limiting ring ensures the movement range of the lower piston body, the retaining edge and sealing ring enhance the sealing performance, and the exhaust hole ensures the pressure balance inside the vacuum bottle.

[0011] Furthermore, the lower pressure cover has a mounting hole in its center corresponding to the middle connecting member. A limiting step is provided at the lower end of the mounting hole, and the upper end of the middle connecting member extends into the mounting hole and can be hung on the limiting step. A retaining ring is provided on the lower end face of the lower pressure cover, and the retaining ring is coaxially arranged with the mounting hole. Several evenly distributed material passage holes are provided on the lower pressure cover, located inside the retaining ring and surrounding the mounting hole. Several hooks are provided on the lower end face of the lower pressure cover, and the hooks are surrounding the retaining ring, with their lower ends hooking into the retaining sleeve. In this design, the mounting hole and limiting step fix the middle connecting member, the material passage holes allow material to pass through, and the hooks and retaining sleeve are securely connected, ensuring reliable transmission.

[0012] Furthermore, the upper piston body includes a third sidewall and a fourth sidewall from the outside to the inside. The upper and lower ends of the third sidewall are both bent outwards and abut against the inner sidewall of the second stop. The upper end of the third sidewall abuts against the retaining sleeve, and the lower end of the fourth sidewall abuts against the middle connecting member. The lower end of the retaining ring is located between the third and fourth sidewalls. In this design, the bent sidewalls improve the sealing performance during movement, and the retaining ring improves positioning accuracy, ensuring smooth movement of the upper piston body.

[0013] Furthermore, a pressing port is provided in the center of the upper pressure cover, and an arc-shaped sidewall is provided around the pressing port. The lower end of the arc-shaped sidewall is connected to the pressure sleeve. In this design, the pressing port is easy to operate, and the arc-shaped sidewall itself can undergo elastic deformation, thereby realizing the rebound function after pressing.

[0014] Furthermore, the material distribution plate has several through holes that communicate with the material passage holes; the upper end of the material distribution plate is fixedly connected to the pressing port, and the lower outer edge of the material distribution plate is inserted into and fixedly connected to the lower pressure cover. In this design, the through holes can evenly distribute the material, and the material distribution plate is firmly connected, ensuring uniform material extrusion.

[0015] Furthermore, a material dispensing port is provided in the middle of the bottle cap, and the dispensing membrane is fixed to the material dispensing port. In this design, the material extrusion rate is controlled by the dispensing membrane, making material dispensing convenient and hygienic.

[0016] Due to the application of the above technical solution, the beneficial effects of this utility model compared with the prior art are as follows: 1. This utility model adopts an all-plastic structure, which can be recycled as a whole without disassembly, making it environmentally friendly and reducing costs.

[0017] 2. This utility model achieves volume changes in the placement chamber and storage chamber by moving the lower piston body and the upper piston body, and combined with the one-way valve function of the valve plug, ensures smooth material extrusion and replenishment.

[0018] 3. This utility model adopts a multi-level flange and step design to improve the positioning accuracy and sealing performance of the components.

[0019] 4. This utility model uses curved sidewalls and sealing rings to enhance the seal, prevent leakage, and provide good sealing performance.

[0020] 5. The exhaust vent in this invention keeps the internal air pressure balanced, thus avoiding difficulties in material handling.

[0021] 6. This utility model adopts a material distribution plate and discharge membrane structure, which makes the material discharge more uniform and convenient to use. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the vacuum bottle of this utility model; Figure 2 This is a cross-sectional view of the vacuum bottle of this utility model; Figure 3 This is a schematic diagram of the bottle base structure of this utility model; Figure 4 This is a schematic diagram of the lower piston body structure of this utility model; Figure 5 This is a schematic diagram of the shoulder sleeve structure of this utility model; Figure 6 This is a schematic diagram of the valve plug structure of this utility model; Figure 7 This is a schematic diagram of the upper piston body structure of this utility model; Figure 8 This is a schematic diagram of the lower pressure cap structure of this utility model. Figure 1 ; Figure 9 This is a schematic diagram of the lower pressure cap structure of this utility model. Figure 2 ; Figure 10 This is a schematic diagram of the upper pressure cover structure of this utility model; Figure 11 This is a schematic diagram of the material distribution plate structure of this utility model; Figure 12 This is a schematic diagram of the bottle cap structure of this utility model; In the above attached figures, 1. Bottle base; 101. Second sinking platform; 102. Limiting ring; 103. Edge retainer; 104. Vent hole; 2. Lower piston body; 201. First recessed platform; 202. First side wall; 203. Second side wall; 3. Shoulder sleeve; 301. Material passage; 302. First guard edge; 303. Second guard edge; 304. Third guard edge; 305. First step; 306. Second step; 307. Third step; 4. Valve plug; 401. Baffle plate; 402. Hollowed-out structure; 5. Middle connector; 6. Upper piston body; 601. Third side wall; 602. Fourth side wall; 7. Lower pressure cap; 701. Mounting hole; 702. Limiting step; 703. Snap ring; 704. Material passage hole; 705. Snap hook; 8. Top cap; 801. Pressing port; 802. Curved sidewall; 9. Material distribution plate; 901. Material passage hole; 10. Bottle cap; 1001. Dispensing port; 11. Discharge membrane; 12. Compression sleeve; 13. Pressure sleeve; 14. Sealing ring; A. Placement cavity; B. Storage cavity. Detailed Implementation

[0023] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0024] It should be noted that in the description of this utility model, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "horizontal," "vertical," and "suspended," etc., do not indicate that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0027] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0028] Example: This embodiment provides a vacuum bottle structure, see attached document. Figure 1 and attached Figure 2 As shown, the device includes a bottle base 1, inside which a lower piston 2 is installed, which can move up and down. A shoulder sleeve 3 is positioned above the lower piston 2, with its upper edge pressing against the upper part of the bottle base 1. The bottle base 1, lower piston 2, and shoulder sleeve 3 together form a placement cavity A for accommodating the material. A material outlet 301 is opened in the middle of the shoulder sleeve 3, and a valve plug 4 is positioned above the material outlet 301. A middle connecting member 5 is positioned above the valve plug 4. An upper piston 6 is fitted over the middle connecting member 5, and the upper piston 6 can move up and down. A lower pressure cap 7 is positioned above the upper piston 6, and the upper piston 6 and the lower pressure cap 7 are connected via the middle connecting member 5. The shoulder sleeve 3, upper piston 6, valve plug 4, and middle connecting member 5 together form a storage cavity B for temporarily storing the material.

[0029] An upper pressure cap 8 is located above the lower pressure cap 7, and a distribution plate 9 is located in the middle of the upper pressure cap 8. A bottle cap 10 is located above the upper pressure cap 8, covering the bottle body base 1, and a discharge membrane 11 is located in the middle of the bottle cap 10. A retaining sleeve 12 is connected below the lower pressure cap 7, and the inner edge of the retaining sleeve 12 presses against the upper piston body 6, and the retaining sleeve 12 is secured to the shoulder sleeve 3. A pressure sleeve 13 is connected below the upper pressure cap 8, and the pressure sleeve 13 is located above the shoulder sleeve 3 and outside the retaining sleeve 12.

[0030] Specifically, see Appendix Figure 5As shown, the outer side of the feed port 301 of the shoulder sleeve 3 is provided with a first stop 302, a second stop 303, and a third stop 304 from the inside to the outside. All the stops are annular and integrally formed with the shoulder sleeve 3. The integrated structure enhances the overall strength, reduces assembly steps, and lowers costs. The valve plug 4 is located inside the first stop 302, the lower piston body 2 and the middle connecting piece 5 are located inside the second stop 303, and the ferrule 12 is engaged with the second stop 303 and the third stop 304. The inside of the shoulder sleeve 3 is provided with a first step 305, a second step 306, and a third step 307 from the outside to the inside. The second stop 303 is located on the third step 307, and the third stop 304 is located on the inner edge of the third step 307.

[0031] See appendix Figure 6 As shown, the valve plug 4 includes a baffle 401 and a hollow structure 402. The diameter of the baffle 401 is larger than the diameter of the feed port 301 to prevent backflow.

[0032] See Appendix for lower piston body 2 Figure 4 As shown, the inner bottom surface is provided with a first recessed platform 201, which includes a first side wall 202 and a second side wall 203 from the outside to the inside. The upper and lower ends of the first side wall 202 are bent outward and abut against the inner side wall of the bottle base 1.

[0033] See appendix Figure 3 As shown, a second recessed platform 101 is provided on the inner bottom surface of the bottle base 1, corresponding to the first recessed platform 201. A limiting ring 102 is provided on the inner bottom surface, located between the first side wall 202 and the second side wall 203. A retaining edge 103 is provided on the outer side wall, which mates with the outer side wall of the bottle cap 10, and a sealing ring 14 is fitted on the upper part of the retaining edge 103. Two vent holes 104 are opened at the lower end of the bottle base 1.

[0034] See Appendix 7 for the lower pressure cap. Figure 8 and attached Figure 9 As shown, a mounting hole 701 is provided in the middle, and a limiting step 702 is provided at the lower end. The upper end of the middle connector 5 is hung on the limiting step 702. A retaining ring 703 is provided on the lower end face of the lower pressure cover 7, which is coaxial with the mounting hole 701. Several evenly distributed material passage holes 704 are provided on the lower pressure cover 7, which are arranged around the mounting hole 701. A hook 705 is provided on the lower end face of the lower pressure cover 7, which is arranged around the retaining ring 703 and hooked to the retaining sleeve 12.

[0035] Upper piston body 6 (see appendix) Figure 7 As shown, from the outside to the inside, it includes a third sidewall 601 and a fourth sidewall 602; the upper and lower ends of the third sidewall 601 are bent outwards and abut against the inner sidewall of the second stop 303. The upper end of the third sidewall 601 abuts against the retaining sleeve 12, and the lower end of the fourth sidewall 602 abuts against the middle connecting member 5. The lower end of the retaining ring 703 is located between the third sidewall 601 and the fourth sidewall 602.

[0036] See Appendix 8 for the upper pressure cap. Figure 10As shown, a pressing port 801 is opened in the middle, and an arc-shaped side wall 802 is provided around it. The lower end is connected to a pressure sleeve 13.

[0037] See attached material distribution plate 9. Figure 11 As shown, several material passage holes 901 are opened, which are connected to the corresponding material passage holes 704. The upper end of the material distribution plate 9 is fixedly connected to the pressing port 801, and the lower outer edge is inserted into the lower pressure cover 7 and fixed.

[0038] See appendix for bottle cap 10. Figure 12 As shown, a material inlet 1001 is opened in the middle, and the discharge membrane 11 is fixed to the material inlet 1001.

[0039] All components are made of plastic, and the product can be recycled as a whole without disassembly after assembly, which meets environmental protection requirements.

[0040] Working principle: Initially, the placement chamber A is filled with material, and the storage chamber B contains some material (pre-filled through repeated pressing). When the finger presses down on the discharge membrane 11, the discharge membrane 11 presses down on the distribution plate 9, which in turn moves the lower pressure cover 7 downwards. The downward movement of the lower pressure cover 7 causes the middle connecting piece 5 and the upper piston body 6 to move downwards, compressing the volume of the storage chamber B. At this time, the valve plug 4 acts as a one-way valve, preventing material from entering the storage chamber B.

[0041] Simultaneously, the arc-shaped sidewall 802 of the upper pressure cover 8 undergoes elastic deformation, storing rebound force. The material in the storage chamber B is compressed, squeezed upward through the inner side of the upper piston body 6 into the inner side of the retaining ring 703, enters the material passage hole 901 of the distribution plate 9 through the material passage hole 704, and is finally extruded from the discharge membrane 11.

[0042] When the finger leaves the discharge membrane 11, the upper pressure cover 8 springs back, causing the distribution plate 9 and the lower pressure cover 7 to move upward. The lower pressure cover 7, through the middle connector 5, causes the upper piston body 6 to move upward, increasing the volume of the storage chamber B and creating negative pressure. The channel of the valve plug 4 opens, and the lower piston body 2 moves upward under negative pressure. The material in the placement chamber A is squeezed into the storage chamber B through the feed port 301, replenishing the storage. This cycle continues, achieving continuous material feeding.

[0043] The vent 104 ensures that the internal air pressure of the bottle base 1 is balanced, preventing the piston 2 from moving under vacuum.

[0044] The sealing ring 14 enhances the seal between the cap 10 and the bottle base 1.

[0045] The vacuum bottle structure designed in this utility model has several significant advantages: First, its core innovation lies in the coordinated design of the lower piston body and the placement chamber, and the upper piston body and the storage chamber, combined with the one-way valve function of the valve plug, achieving efficient and unidirectional material conveying. When pressed, the storage chamber is pressurized, smoothly extruding the material; when released, the storage chamber generates negative pressure, automatically replenishing the material from the lower placement chamber and driving the lower piston body upward to maintain overall pressure balance. This ensures a smooth material handling process, preventing material backflow and contamination, greatly improving the hygiene and reliability of the user experience. Second, the structure is ingenious and compact. Through the multi-stage flanges and steps of the shoulder sleeve, the curved sidewalls of each piston body, and the sealing rings, multiple seals are achieved, effectively preventing material leakage and drying. Simultaneously, the distribution plate and discharge membrane ensure that the material is extruded evenly and precisely, avoiding waste. Finally, all components of the vacuum bottle can be made of plastic, allowing for complete recycling without the need for metal springs or disassembly, thus meeting current green and environmentally friendly industry requirements. This reduces production costs while minimizing environmental impact. In summary, this structure integrates functionality, reliability, environmental friendliness, and optimized user experience, resulting in superior overall performance.

[0046] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They cannot be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A vacuum bottle structure, characterized in that: Includes a bottle base (1), inside which is provided a lower piston (2) that can move up and down, and a shoulder sleeve (3) is provided above the lower piston (2). The upper edge of the shoulder sleeve (3) presses against the upper part of the bottle base (1). The bottle base (1), the lower piston (2) and the shoulder sleeve (3) together form a placement cavity (A) that can accommodate the material. The shoulder sleeve (3) has a material passage (301) in the middle. A valve plug (4) is provided above the material passage (301). A middle connector (5) is provided above the valve plug (4). An upper piston body (6) that can move up and down is sleeved on the outside of the middle connector (5). A lower pressure cover (7) is provided above the upper piston body (6). The upper piston body (6) and the lower pressure cover (7) are connected through the middle connector (5). The shoulder sleeve (3), the upper piston body (6), the valve plug (4) and the middle connector (5) together form a material storage cavity (B) that can accommodate the material. An upper pressure cap (8) is provided above the lower pressure cap (7), a material distribution plate (9) is provided in the middle of the upper pressure cap (8), a bottle cap (10) is provided above the upper pressure cap (8), the bottle cap (10) covers the bottle body base (1), and a discharge membrane (11) is provided in the middle of the bottle cap (10). A sleeve (12) is connected below the lower pressure cover (7). The inner edge of the sleeve (12) presses against the upper piston body (6). The sleeve (12) is engaged on the shoulder sleeve (3). A pressure sleeve (13) is fixedly connected below the upper pressure cover (8). The pressure sleeve (13) is located above the shoulder sleeve (3) and outside the sleeve (12).

2. The vacuum bottle structure according to claim 1, characterized in that: The outer side of the feed port (301) of the shoulder sleeve (3) is provided with a first stop (302), a second stop (303) and a third stop (304) perpendicular to the bottom surface of the shoulder sleeve (3) from the inside to the outside. The valve plug (4) is located inside the first stop (302). The lower piston body (2) and the middle connecting piece (5) are both located inside the second stop (303). The ferrule (12) is engaged on the second stop (303) and the third stop (304). The shoulder cover (3) has a first step (305), a second step (306) and a third step (307) arranged sequentially from the outside to the inside. The second guard edge (303) is arranged on the third step (307), and the third guard edge (304) is arranged on the inner edge of the third step (307).

3. The vacuum bottle structure according to claim 1, characterized in that: The valve plug (4) includes a baffle (401) disposed in its middle, the diameter of the baffle (401) being larger than the diameter of the feed port (301); the outer side of the baffle (401) is provided with a hollow structure (402).

4. The vacuum bottle structure according to claim 1, characterized in that: The lower piston body (2) has a recessed first sink plate (201) on its inner bottom surface. The lower piston body (2) includes a first side wall (202) and a second side wall (203) from the outside to the inside. The upper and lower ends of the first side wall (202) are bent outward and abut against the inner side wall of the bottle base (1).

5. A vacuum bottle structure according to claim 4, characterized in that: The inner bottom surface of the bottle base (1) is provided with a recessed second recessed platform (101), and the second recessed platform (101) is provided vertically corresponding to the first recessed platform (201); A limiting ring (102) is provided on the inner bottom surface of the bottle base (1) near its inner sidewall, and the limiting ring (102) is located between the first sidewall (202) and the second sidewall (203). The outer side wall of the bottle base (1) is provided with a retaining edge (103) that is aligned with the outer side wall of the bottle cap (10). A sealing ring (14) is provided between the retaining edge (103) and the bottle cap (10). The sealing ring (14) is fitted onto the upper end of the retaining edge (103). The lower end of the bottle base (1) is provided with an exhaust hole (104).

6. The vacuum bottle structure according to claim 2, characterized in that: The lower pressure cover (7) has a mounting hole (701) in the middle corresponding to the middle connector (5). The lower end of the mounting hole (701) is provided with a limiting step (702). The upper end of the middle connector (5) extends into the mounting hole (701) and can be hung on the limiting step (702). The lower end face of the lower pressure cover (7) is provided with a retaining ring (703), and the retaining ring (703) is coaxially arranged with the mounting hole (701); The lower pressure cover (7) has several evenly distributed material passage holes (704), which are located inside the retaining ring (703) and surround the mounting hole (701). The lower end face of the lower pressure cover (7) is provided with a plurality of hooks (705), the hooks (705) are wrapped around the retaining ring (703), and the lower end of the hooks (705) is hooked to the retaining sleeve (12).

7. A vacuum bottle structure according to claim 6, characterized in that: The upper piston body (6) includes a third side wall (601) and a fourth side wall (602) from the outside to the inside. The upper and lower ends of the third side wall (601) are both bent outward and abut against the inner side wall of the second stop (303). The upper end of the third sidewall (601) abuts against the sleeve (12), and the lower end of the fourth sidewall (602) abuts against the middle connector (5); The lower end of the retaining ring (703) is located between the third sidewall (601) and the fourth sidewall (602).

8. A vacuum bottle structure according to claim 6, characterized in that: The upper pressure cover (8) has a pressing port (801) in the middle, and an arc-shaped sidewall (802) is provided around the pressing port (801). The lower end of the arc-shaped sidewall (802) is connected to the pressure sleeve (13).

9. A vacuum bottle structure according to claim 8, characterized in that: The material distribution plate (9) has several material passage holes (901) that are connected to the material passage hole (704); the upper end of the material distribution plate (9) is fixedly connected to the pressing port (801), and the outer edge of the lower end of the material distribution plate (9) is inserted into the lower pressure cover (7) and fixedly connected to it.

10. A vacuum bottle structure according to claim 1, characterized in that: The bottle cap (10) has a feeding port (1001) in the middle, and the discharging membrane (11) is fixed in the feeding port (1001).

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