Domestic glass bottle closure

Abstract

The application discloses a household glass bottle sealing device, relates to the technical field of bottle sealing, and comprises a sealing device shell, a control assembly is arranged in the sealing device shell, and a gland shaft is installed in the sealing device shell; a bottle cap fixing disc is installed at the end of the gland shaft away from the sealing device shell, and the bottle cap fixing disc is used for positioning and compressing a bottle cap; a cap rotating shell, an extrusion assembly and a cap rotating assembly are arranged, the cap rotating shell is rotationally matched with the gland shaft, the extrusion assembly is arranged in the cap rotating shell, and the cap rotating assembly is arranged at one end of the extrusion assembly; when the cap rotating shell rotates, the cap rotating assembly can be driven by the extrusion assembly to extrude towards the bottle cap; the household glass bottle sealing device is automatically driven to seal by a battery and a motor, and the traditional purely manual sealing device is replaced; manual continuous pressure is not needed in the whole process, and the automatic glass bottle metal cap rolling sealing is completed, so that the operation time and physical strength of a user are greatly saved, and the market blank of household automatic glass bottle sealing devices is filled.

Description

Technical Field

[0001] This invention relates to the field of bottle sealing technology, specifically a household glass bottle sealing device. Background Technology

[0002] Glass jars are common household containers for sealing and storing food, widely used for packaging and preserving ingredients such as jams, pickles, cooked foods, and juices. These glass jars require a special metal cap for a rolling seal to achieve airtight sealing and freshness preservation. Currently, the equipment available on the market for sealing glass jars with metal caps is all manual sealing device, which is the mainstream equipment for sealing glass jars in home settings.

[0003] Existing manual sealing devices have significant technical shortcomings in practical use. The entire operation relies on manual pressure application, alignment, and pressing to complete the sealing process, resulting in extremely low automation. This not only requires users to invest a lot of time, but also involves cumbersome procedures and has a high learning curve, greatly consuming users' physical strength and energy. Furthermore, the sealing efficiency is low, making it difficult to meet the convenient and efficient sealing needs of modern families.

[0004] Therefore, a household glass bottle sealing device was proposed to solve the above problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a household glass bottle sealing device to solve the problem that existing glass bottle sealing devices rely on manual pressure application, alignment, and pressing to complete the sealing operation, resulting in a very low degree of automation.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a household glass bottle sealing device, comprising... A sealing device housing, wherein a control component is provided inside the sealing device housing, and a capping shaft is installed inside the sealing device housing; A bottle cap retaining plate is installed at the end of the capping shaft away from the sealing device housing, and the bottle cap retaining plate is used to position and press the bottle cap; The capping shell, the extrusion assembly, and the capping assembly are provided. The capping shell is rotatably engaged with the capping shaft. The extrusion assembly is disposed inside the capping shell and at one end of the extrusion assembly. When the capping shell rotates, the extrusion assembly can drive the capping assembly to extrude towards the bottle cap. The device includes a motor, a gear ring, and a transmission component. All three components are housed within the sealing device housing. The motor drives the gear ring to rotate within the housing via the transmission component. The gear ring is nested with the cap shell, allowing the cap shell to rotate synchronously with the gear ring. This, in turn, causes the cap assembly to rotate, pressing the outer edge of the cap against the glass bottle to achieve sealing.

[0007] Preferably, the toothed ring overlaps with the axis of the gland shaft, and the transmission component is a gear set capable of three-stage speed change.

[0008] Preferably, the control component includes a battery and a main control circuit board installed inside the sealing device housing. The battery is electrically connected to the main control circuit board, and the main control circuit board is electrically connected to the motor. The battery supplies power to the motor through the main control circuit board. The sealing device housing is also provided with a control button, which is electrically connected to the main control circuit board and is used to control the rotation direction and start / stop of the motor output shaft.

[0009] Preferably, the sealing device housing is also provided with a hidden master control switch, which is electrically connected to the main control circuit board and is used to control the on / off state of the main control circuit board.

[0010] Preferably, the main control circuit board is a printed circuit board.

[0011] Preferably, the sealing device housing is also provided with a charging port, through which the charging cable charges the battery.

[0012] Preferably, the extrusion assembly includes an extrusion seat slidably disposed on the cap shell. The extrusion seat is driven by the cap shaft through a groove. A variable diameter gear located on one side of the cap shaft is rotatably mounted on the extrusion seat. The cap shaft is driven by the variable diameter gear through a tooth groove. A push rod located on the other side of the cap shaft is movably inserted on the extrusion seat. A fork block is fixed at one end of the push rod. The fork block is in contact with the cap shaft. A spring is sleeved on the push rod between the extrusion seat and the fork block.

[0013] Preferably, the outer diameter of the variable diameter gear gradually changes along the axial direction.

[0014] Preferably, the capping assembly includes a fine-tuning mechanism and a capper, wherein the capper is mounted at one end of the pressing seat via the fine-tuning mechanism, and the fine-tuning mechanism is used to adjust the height of the capper.

[0015] Preferably, the fine-tuning mechanism includes a screw fixed to one end of the extrusion seat, with an adjusting sleeve and a nut threaded from top to bottom on the screw. The capping device is fitted onto the adjusting sleeve, and a lever is fixedly connected to the surface of the adjusting sleeve. By rotating the adjusting sleeve to change its position on the screw, the height of the capping device can be adjusted.

[0016] Compared with the prior art, the present invention provides a household glass bottle sealing device, which has the following beneficial effects: This invention uses a battery-powered, motor-driven automatic sealing system to replace traditional manual sealing equipment. It eliminates the need for continuous manual pressure throughout the process, automatically completing the rolling and sealing of metal caps on glass bottles. This significantly saves users' operating time and effort, filling a market gap for household automatic glass bottle sealing equipment.

[0017] The transmission component in this invention is a three-stage variable speed gear set, which can reduce the speed and increase the torque of the motor output, providing sufficient rolling and extrusion force. The outer diameter of the variable diameter gear gradually changes along the axial direction. After meshing with the tooth groove of the capping shaft, it drives the capping assembly to rotate and feed along a special trajectory, which can gradually extrude the outer edge of the metal cap, so that the cap edge is evenly fitted to the bottle mouth, effectively avoiding sealing problems such as edge curling and air leakage. The sealing quality is stable. At the same time, the variable diameter gear switching position can produce two different sounds. Users do not need to observe the internal structure. They can intuitively distinguish the sealing process by sound alone and quickly judge the completion status of the sealing operation.

[0018] This invention features a two-stage switch control circuit. A concealed master switch is connected in series in the main power supply circuit of the entire machine. When disconnected, the device is completely powered off, preventing children from accidentally starting the device by touching the exposed control buttons. The exposed control buttons only serve as signal switches, controlling only the start, stop, and reversal of the motor. They are printed circuit boards that integrate charging management and motor overload protection circuits. During charging, the current is controlled to prevent battery overcharging. When the motor stalls or the load is too high, the power is automatically cut off to protect the motor and the circuit board. This dual protection during charging and operation makes it safe and reliable for home use.

[0019] This invention features an independent fine-tuning mechanism in the capping assembly. Users can move the lever to raise and lower the adjusting sleeve, freely adjusting the working height of the capper to adapt to the sealing positions of different glass bottles and matching metal caps. After adjustment, the capper is locked in place by a nut, ensuring that the height of the capper will not shift during operation, guaranteeing consistent sealing force each time, and making the equipment more adaptable.

[0020] This invention features an ergonomically designed curved grip surface integrally formed on the top of the sealing device housing, conforming to the natural grip contour of the palm without sharp edges, reducing fatigue during prolonged handheld operation; the entire device uses a rechargeable lithium battery solution, with a dedicated charging port on the side wall of the housing, allowing charging without disassembling the housing, providing long-lasting battery life on a full charge, and can be used independently without mains power at home or outdoors, with no restrictions on usage scenarios. Attached Figure Description

[0021] Figure 1 This is a first-view perspective perspective view of the main structure of the present invention; Figure 2 This is a second-view perspective perspective view of the main structure of the present invention; Figure 3 This is a cross-sectional view of the main structure of the present invention; Figure 4 This is a schematic diagram of the relevant structures inside the sealing device housing of the present invention; Figure 5 This is a schematic diagram of the toothed ring and screw cap shell of the present invention. Figure 6 This is a schematic diagram of the relevant structures inside the screw cap shell of the present invention; Figure 7 This is a schematic diagram of the relevant structures of the extrusion seat and slide groove of the present invention; Figure 8 This is a schematic diagram of the variable diameter gear, tooth groove, and push rod of the present invention; Figure 9 This is an exploded view of the relevant structure of the capping assembly of the present invention; Figure 10 This is a schematic diagram of the control component of the present invention.

[0022] Figure label: 1. Sealer housing; 2. Control components; 21. Battery; 22. Main control circuit board; 23. Control button; 24. Master control switch; 3. Motor; 4. Gear ring; 5. Transmission component; 6. Capping shaft; 7. Bottle cap fixing plate; 8. Capping shell; 9. Extrusion assembly; 91. Extrusion seat; 92. Slide groove; 93. Variable diameter gear; 94. Gear groove; 95. Push rod; 96. Spring; 97. Fork block; 10. Capping assembly; 101. Fine adjustment mechanism; 1011. Screw; 1012. Adjusting sleeve; 1013. Nut; 1014. Toggle block; 102. Capper; 11. Charging port. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and 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. Therefore, they should not be construed as limitations on this invention.

[0025] In addition, a fixed connection refers to a connection in which parts or components are fixed and there is no relative movement; a transmission connection refers to a connection in which mechanical motion or torque is transmitted to other working parts through a transmission component; a sliding connection refers to a connection in which two objects are in contact but not fixed and can slide relative to each other; and a rotational connection refers to a connection in which two objects are in contact but not fixed and can rotate relative to each other.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0028] Example 1, please refer to Figures 1 to 5 As shown: To address the problems mentioned in the technical solutions, this application provides a household glass bottle sealing device, including a sealing device housing 1. The top of the sealing device housing 1 has an integrally formed arc-shaped ergonomic grip surface, the curvature of which matches the natural grip shape of the palm, with no sharp edges, making it easy for users to hold the entire machine stably with one hand for sealing operations. A control component 2 is provided inside the sealing device housing 1, and a capping shaft 6 is installed inside the sealing device housing 1; a bottle cap fixing plate 7 is installed at the end of the capping shaft 6 away from the sealing device housing 1, and the bottle cap fixing plate 7 is used to position and press the bottle cap. During operation, the glass bottle is placed with the bottle mouth facing upwards, the metal cap is placed at the bottle mouth, and the entire machine is pressed down, the bottle cap fixing plate 7 presses the top surface of the metal cap to complete the bottle cap positioning, and prevents the bottle cap from shifting during the sealing process; a capping shell 8, a pressing component 9, and a capping component 10 are also provided. The capping shell 8 is rotatably engaged with the capping shaft 6, and the pressing component 9 is located at the top of the capping shaft 6. Inside the cap shell 8, the capping assembly 10 is located at one end of the extrusion assembly 9. When the cap shell 8 rotates, the extrusion assembly 9 drives the capping assembly 10 to press against the bottle cap. The motor 3, gear ring 4, and transmission component 5 are all located inside the sealing device housing 1. The motor 3 can drive the gear ring 4 to rotate within the sealing device housing 1 via the transmission component 5. The gear ring 4 is nested with the cap shell 8, allowing the cap shell 8 to rotate synchronously with the gear ring 4, thereby driving the capping assembly 10 to rotate and press the outer edge of the bottle cap against the glass bottle to achieve sealing. The axis of the gear ring 4 overlaps with the capping shaft 6. The transmission component 5 is a gear set capable of three-stage speed change. The original output speed of the motor 3 is relatively high, and the torque is relatively low. After the gear set reduces speed and increases torque step by step, the output torque of the gear ring 4 is greatly improved, providing sufficient extrusion force for metal cap rolling operations, resulting in better sealing and forming effect, lower equipment operating load, and higher safety.

[0029] For a further embodiment two, please refer to Figure 2 , Figure 4 , Figure 10 As shown: The control component 2 includes a battery 21 and a main control circuit board 22 installed inside the sealing device housing 1. The battery 21 is electrically connected to the main control circuit board 22, and the main control circuit board 22 is electrically connected to the motor 3. The battery 21 supplies power to the motor 3 through the main control circuit board 22. A control button 23 is also provided on the sealing device housing 1, which is electrically connected to the main control circuit board 22 and used to control the rotation direction and start / stop of the output shaft of the motor 3. The battery 21 uses two lithium batteries. Lithium batteries have sufficient energy storage capacity, strong output, long working time, and are stable and reliable, providing a smooth power supply without the problem of insufficient sealing force due to sudden voltage drops. A hidden master switch 24 is also provided on the sealing device housing 1. The master switch 24 is electrically connected to the main control circuit board 22 and used to control the on / off state of the circuit of the main control circuit board 22. When the master switch 24 is off, the power supply circuit of the entire machine is completely cut off. Even if a child accidentally touches the exposed control button 23, the motor 3 will not start, effectively avoiding the safety hazard of misoperation.

[0030] Preferably, the main control circuit board 22 is a printed circuit board (PCB), which integrates a dedicated power management chip and a motor overload protection chip. During the charging phase of the battery 21, the charging current can be controlled to prevent overcharging and damage to the battery cells. When the motor stalls or is overloaded, the power supply to the motor 3 can be automatically cut off to protect the motor 3 and the main control circuit board 22 from being burned out. The sealing device housing 1 is also provided with a charging port 11. The charging cable charges the battery 21 through the charging port 11, eliminating the need to disassemble the housing to replace the battery 21, making the charging operation simple.

[0031] For a further embodiment three, please refer to Figures 6 to 8 As shown: The extrusion assembly 9 includes an extrusion seat 91 slidably mounted on the cap shell 8. The extrusion seat 91 is driven by the cap shaft 6 via a sliding groove 92. A variable diameter gear 93 located on one side of the cap shaft 6 in the diameter direction is rotatably mounted on the extrusion seat 91. The cap shaft 6 is driven by the variable diameter gear 93 through a toothed groove 94. A push rod 95 located on the other side of the cap shaft 6 in the diameter direction is movably inserted into the extrusion seat 91. A fork block 97 is fixed to one end of the push rod 95. The fork block 97 is in contact with the cap shaft 6. A spring 96 is sleeved on the push rod 95 between the extrusion seat 91 and the fork block 97. The spring 96 continuously provides pushing force, so that the fork block 97 is always in close contact with the cap shaft 6, ensuring that the variable diameter gear 93 and the toothed groove 94 are continuously engaged without disengaging, and the transmission is stable. The outer diameter of the variable diameter gear 93 gradually changes along the axial direction.

[0032] Specifically, when the cap shell 8 revolves, the extrusion seat 91 rotates around the cap shaft 6 with the cap shell 8. The variable diameter gear 93 rolls and meshes along the tooth groove 94 of the cap shaft 6. Relying on the gear outer diameter gradual change structure, the extrusion seat 91 synchronously generates axial feed motion, which drives the cap assembly 10 to rotate while extruding the metal cap inward. The metal cap is gradually rolled and sealed along a special trajectory. When the cap shell 8 rotates in the forward direction, the cap assembly 10 is close to the metal cap, and when it rotates in the reverse direction, the cap assembly 10 is away from the metal cap.

[0033] There is a switching point between the maximum and minimum radii of the variable diameter gear 93. When the variable diameter gear 93 rotates to the switching point in the direction of decreasing radius, the cap shell 8 continues to rotate. At this time, the variable diameter gear 93 will not continue to rotate and will produce sound one due to tooth disengagement from the tooth groove 94. When the variable diameter gear 93 rotates to the switching point in the direction of increasing radius, the cap shell 8 continues to rotate. At this time, the variable diameter gear 93 will continue to rotate and will produce sound two because it slides quickly from the large radius position to the small radius position at the switching point. The two sounds are different, which makes it easier for users to refer to and judge the sealing status.

[0034] For a further embodiment four, please refer to Figure 6 , Figure 9 As shown: The capping assembly 10 includes a fine-tuning mechanism 101 and a capper 102. The capper 102 is mounted on one end of the extrusion seat 91 via the fine-tuning mechanism 101, and the fine-tuning mechanism 101 is used to adjust the height of the capper 102. The fine-tuning mechanism 101 includes a screw 1011 fixed to one end of the extrusion seat 91. An adjusting sleeve 1012 and a nut 1013 are threaded onto the screw 1011 from top to bottom. The capper 102 is fitted onto the adjusting sleeve 1012. A lever 1014 is fixedly connected to the surface of the adjusting sleeve 1012. By rotating the adjusting sleeve 1012 to change its position on the screw 1011, the height of the capper 102 can be adjusted.

[0035] Since the sealing positions of the bottle mouth and metal cap vary depending on the type of glass bottle, the user can adjust the height of the capper 102 using the fine-tuning mechanism 101 before sealing to adapt to different sealing situations and ensure a good seal. Specifically, the user can manually move the lever 1014 to raise and lower the adjusting sleeve 1012 along the screw 1011, changing the working height of the capper 102. After adjusting to the appropriate height, tighten the lower nut 1013 to press against the bottom of the adjusting sleeve 1012, locking the position of the adjusting sleeve 1012. During the sealing process, the height of the capper 102 will not shift on its own, ensuring consistent sealing.

[0036] The working process and working principle of all the content in the above embodiments are as follows: Before use, turn the hidden master control switch 24 inside the sealing device housing 1 to the on state to connect the whole machine to the battery 21; if the battery 21 is low on power, it can be charged through the charging port 11 of the housing with an external power cord. The main control circuit board 22 has a built-in charging protection circuit, and the charging process is safe and stable.

[0037] Pre-operation adjustment: Move the lever 1014 of the fine-tuning mechanism 101 to adjust the height of the capper 102 according to the actual sealing position of the glass bottle and the metal cap, and tighten the locking nut 1013 to complete the positioning; place the glass bottle to be sealed stably, fasten the metal cap on the bottle mouth, hold the ergonomic grip surface on the top of the sealing device housing 1, and press down on the whole machine to make the bottle cap fixing plate 7 press against the top surface of the metal cap to complete the bottle cap positioning.

[0038] Start-up: Press control button 23. After receiving the signal, the main control circuit board 22 turns on the motor 3 to supply power. The motor 3 outputs power to the transmission component 5, which drives the gear ring 4 to rotate after deceleration and torque increase. The gear ring 4 synchronously drives the cap shell 8 to revolve around the capping shaft 6. The squeezing seat 91 inside the cap shell 8 rotates synchronously. The variable diameter gear 93 of the spiral variable diameter structure meshes and rolls along the tooth groove 94 of the capping shaft 6. The gradually changing outer diameter pushes the squeezing seat 91 to continuously feed towards the bottle mouth, driving the capper 102 to rotate around the metal cap while squeezing the edge of the metal cap inward. The metal cap is rolled and pressed tightly against the bottle mouth along the spiral trajectory, completing the seal.

[0039] After sealing, press the control button 23 in the opposite direction to stop the motor 3. Lift the whole machine upward to remove the sealed glass bottle. If the equipment is not used for a long time, turn on the hidden master control switch 24 to cut off the power of the whole machine to avoid static power consumption of the battery 21 and to prevent children from accidentally starting the equipment.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A household glass bottle sealing device, characterized in that: include Sealer housing (1), a control component (2) is provided inside the sealer housing (1), and a capping shaft (6) is installed inside the sealer housing (1). Bottle cap fixing plate (7) is installed at one end of the capping shaft (6) away from the sealing device housing (1). The bottle cap fixing plate (7) is used to position and press the bottle cap. The capping shell (8), the extrusion assembly (9), and the capping assembly (10) are provided. The capping shell (8) is rotatably engaged with the capping shaft (6). The extrusion assembly (9) is located inside the capping shell (8). The capping assembly (10) is located at one end of the extrusion assembly (9). When the capping shell (8) rotates, the extrusion assembly (9) can drive the capping assembly (10) to squeeze towards the bottle cap. The motor (3), gear ring (4) and transmission component (5) are all located inside the sealing device housing (1). The motor (3) can drive the gear ring (4) to rotate inside the sealing device housing (1) through the transmission component (5). The gear ring (4) is nested with the cap shell (8), which enables the cap shell (8) to rotate synchronously with the gear ring (4), thereby driving the cap assembly (10) to rotate and press the outer edge of the cap onto the glass bottle to achieve sealing.

2. The household glass bottle sealing device according to claim 1, characterized in that: The toothed ring (4) overlaps with the axis of the cover shaft (6), and the transmission component (5) is a gear set capable of three-stage speed change.

3. The household glass bottle sealing device according to claim 1, characterized in that: The control component (2) includes a battery (21) and a main control circuit board (22) installed in the sealing device housing (1). The battery (21) is electrically connected to the main control circuit board (22), and the main control circuit board (22) is electrically connected to the motor (3). The battery (21) supplies power to the motor (3) through the main control circuit board (22). The sealing device housing (1) is also provided with a control button (23), which is electrically connected to the main control circuit board (22) and is used to control the rotation direction and start / stop of the output shaft of the motor (3).

4. The household glass bottle sealing device according to claim 3, characterized in that: The sealing device housing (1) is also provided with a hidden master control switch (24), which is electrically connected to the main control circuit board (22) and is used to control the on / off state of the circuit of the main control circuit board (22).

5. The household glass bottle sealing device according to claim 3, characterized in that: The main control circuit board (22) is a printed circuit board.

6. The household glass bottle sealing device according to claim 3, characterized in that: The sealing device housing (1) is also provided with a charging port (11), and the charging cable charges the battery (21) through the charging port (11).

7. The household glass bottle sealing device according to claim 1, characterized in that: The extrusion assembly (9) includes an extrusion seat (91) slidably disposed on the cap shell (8). The extrusion seat (91) is driven by the cap shaft (6) through a sliding groove (92). A variable diameter gear (93) located on one side of the cap shaft (6) is rotatably mounted on the extrusion seat (91). The cap shaft (6) is driven by the variable diameter gear (93) through a tooth groove (94). A push rod (95) located on the other side of the cap shaft (6) is movably inserted on the extrusion seat (91). A fork block (97) is fixed at one end of the push rod (95). The fork block (97) is in contact with the cap shaft (6). A spring (96) is sleeved on the push rod (95) between the extrusion seat (91) and the fork block (97).

8. The household glass bottle sealing device according to claim 7, characterized in that: The outer diameter of the variable diameter gear (93) gradually changes along the axial direction.

9. The household glass bottle sealing device according to claim 7, characterized in that: The capping assembly (10) includes a fine-tuning mechanism (101) and a capper (102). The capper (102) is mounted on one end of the pressing seat (91) via the fine-tuning mechanism (101), and the fine-tuning mechanism (101) is used to adjust the height of the capper (102).

10. The household glass bottle sealing device according to claim 9, characterized in that: The fine-tuning mechanism (101) includes a screw (1011) fixed to one end of the extrusion seat (91). An adjusting sleeve (1012) and a nut (1013) are threaded together from top to bottom on the screw (1011). The capping device (102) is fitted onto the adjusting sleeve (1012). A lever (1014) is fixedly connected to the surface of the adjusting sleeve (1012). By rotating the adjusting sleeve (1012) to change its position on the screw (1011), the height of the capping device (102) can be adjusted.

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