Sealing cover and sealing tank

Abstract

The invention discloses a sealing cover and a sealing tank. The sealing cover comprises a sealing cover bottom shell, a face shell, a key and a double-lever type sealing lifting assembly. The double-lever type sealing lifting assembly is composed of a short lever and a long lever which are hinged in a crossed mode, the short lever and the long lever are both of a double-arm supporting structure, and the structural stability and the stress uniformity are enhanced. And the long lever is provided with a V-shaped supporting included angle and a silica gel pad, so that the sealing effect and durability are improved. The face shell and the bottom shell are connected through cooperation of the clamping strips and the clamping grooves, the structure is stable, and disassembly and assembly are convenient. The sealing cover is further provided with a key locking assembly, a labyrinth groove structure and a lock catch part are adopted, and safety and stability are improved. The sealing tank is composed of a sealing tank body and a sealing cover, and the sealing state and the non-sealing state can be easily switched through key operation. The sealing device is compact in structure, convenient to operate, good in sealing effect and wide in application prospect.

Description

Technical Field

[0001] The invention relates to the technical field of container sealing, and in particular to a sealing cover and a sealing can. Background Art

[0002] A sealed jar is a container with sealing properties, usually used to store food, cosmetics, medicines, stationery and other items.

[0003] Chinese patent publication number CN218230112U discloses a sealing cover and a sealing can, which includes a sealing cover, on which a sealing assembly, a button and a linkage mechanism are arranged; the button, the linkage mechanism and the sealing assembly cooperate to realize the switching between the sealing state and the non-sealing state; the movement of the button drives the sealing assembly to move through the linkage mechanism, thereby realizing the sealing or unlocking of the inside of the box body. However, the lever structure of the above linkage mechanism or other sealing covers mostly adopts a single-arm support or a single-lever structure, and the single-arm lever support structure / single-lever structure will be distorted when subjected to force, making the force uneven, which easily leads to poor sealing effect or short service life.

[0004] Therefore, how to overcome the above-mentioned defects has become an important issue to be solved urgently by those skilled in the art. Summary of the invention

[0005] The present invention overcomes the shortcomings of the above-mentioned technologies and provides a sealing cover and a sealing can. To achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0006] The first aspect of the present invention discloses a sealing cover, comprising: a sealing cover bottom shell 1, a surface shell 2 installed above the sealing cover bottom shell 1, and a button 3 installed on the surface shell 2, wherein a circle of sealing ring 4 is installed on the outer periphery of the sealing cover bottom shell 1, and a double-lever sealing lifting assembly 5 is installed inside the button 3 for driving the sealing cover bottom shell 1 to move to squeeze the sealing ring 4; wherein, the double-lever sealing lifting assembly 5 comprises: a short lever 51 and a long lever 52, wherein the short lever 51 and the long lever 52 are cross-hinged, and the tails of the short lever 51 and the long lever 52 are provided with barbs 53, the sealing cover bottom shell 1 is provided with a clamping hole 11 for the barb 53 to hook into, and the outer edge of the sealing ring 4 abuts against the surface shell 2.

[0007] Preferably, the short lever 51 is a short double-arm lever with double-arm support, and the long lever 52 is a long double-arm lever with double-arm support.

[0008] Preferably, the short lever 51 has first shafts 511 protruding inwardly at both ends of its arms, and the long lever 52 has oblong holes 521 in its arms. The short lever 51 is assembled into the oblong holes 521 on both sides of the long lever 52 through its first shaft 511 to achieve sliding.

[0009] Preferably, the long lever 52 has a protrusion 523 at the top of each support arm thereof, and the support protrusion 523 forms a V-shaped support angle with the head of each support arm of the long lever 52; and the head of each support arm of the long lever 52 is pressed by the key 3 when the key 3 is pressed.

[0010] Preferably, the face shell 2 extends downward from its bottom wall near the periphery to form a circle of top pressure ribs 21, and protrudes downward in the middle to form a first mounting groove 22 for the button 3 to be installed therein, and a clamping strip 23 protrudes from the outer wall of the first mounting groove 22, and the sealing cover bottom shell 1 protrudes upward in the middle to form a second mounting groove 12 for the first mounting groove 22 to swing into, and a clamping groove 13 that cooperates with the clamping strip 23 is provided on the bottom wall of the inner side wall of the second mounting groove 12; the clamping hole 11 is arranged in the second mounting groove 12.

[0011] Preferably, it further comprises: a key locking assembly 6, the key locking assembly 6 comprising: the key 3, a spring 61 for driving the key 3 to automatically reset after releasing an external force, a labyrinth groove structure 62 arranged inside the key 3, and a locking part 63 capable of limited movement along the labyrinth groove path of the labyrinth groove structure 62; the spring 61 is arranged between the key 3 and the housing 2; the labyrinth groove structure 62 comprises: a main body 621 formed by protruding downward from the key 3, a labyrinth groove part 622 formed on the main body 621, the labyrinth groove part 622 comprises: a starting recess 623, a mounting protrusion 624 protruding from the main body 621, an end point recess 625 formed on the mounting protrusion 624, and a guide path 626 arranged around the mounting protrusion 624 and connected between the starting recess 623 and the end point recess 625;

[0012] When the button 3 is pressed downward, the locking part 63 moves upward relatively from the starting recess 623 along one side of the guide path 626; when the button 3 is released, the spring 61 is used to drive the button 3 to reset, and guide the locking part 63 to fall to the end recess 625, thereby achieving a self-locking state; when the button 3 is pressed again, the locking part 63 escapes from the end recess 625 and moves to the other side along the guide path 626, thereby achieving an unlocked state.

[0013] Preferably, the face shell 2 extends upward from the middle of the bottom wall of the installation groove 22 to form a vertical guide groove 25; the guide groove 25 has a guide ridge 26 protruding from one of the inner groove walls, and the main body 621 is provided with a guide groove 627 for the guide ridge 26 to move up and down along it.

[0014] Preferably, a labyrinth groove portion 622 is provided on both sides of the main body portion 621; the locking part 63 is symmetrically provided with locking portions 631 on both sides thereof for limiting movement along the labyrinth groove portions 622 on both sides; the guide groove 25 has a plurality of supporting ribs 27 protruding outward on its outer groove wall, and a transversely extending strip opening 28 is opened on its groove wall, and the locking part 63 is overlapped on the supporting rib 27, and its locking portion 631 passes through the strip opening 28 to the path of the labyrinth groove portion 622.

[0015] Preferably, the side wall of the installation groove 22 is provided with a plurality of vertical guide openings 29, and the button 3 is provided with a guide protrusion 31 which is inserted into the vertical guide opening 29 and moves up and down along the vertical guide opening 29; the outer periphery of the bottom wall of the installation groove 22 is concave downward to form an annular limit groove 221, and the spring 61 is installed on the annular limit groove 221.

[0016] The second aspect of the present invention discloses a sealed can, comprising: a sealed can body 200 and the sealing cover 100 described in the first aspect.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. This case adopts a double-lever seal lifting assembly, including a cross-hinged design of a short lever and a long lever. Compared with the traditional single-arm support or single-lever structure, the double-lever structure of this case can distribute the force more evenly and reduce distortion, thereby ensuring the stability of the sealing cover during the sealing process and the reliability of the sealing effect. This design helps to prevent the problem of poor sealing effect caused by uneven force and improves the overall sealing performance of the sealed can. Moreover, since the force of the double-lever seal lifting assembly is more evenly applied, the risk of component wear and damage caused by concentrated force is reduced. Therefore, compared with the traditional single-lever structure, the sealing cover of this case has a longer service life and can maintain its sealing performance for a longer time. The sealing cover design of this case realizes easy switching between sealed and non-sealed states through the cooperation of buttons and double-lever seal lifting assemblies. It is easy to operate and is conducive to improving user experience. The tails of the short lever and the long lever are both provided with barbs, which can be hooked into the clamping holes of the bottom shell of the sealing cover, thereby ensuring the stability of the double-lever sealing lifting assembly during operation, helping to prevent sealing failure caused by loose components, and further improving the reliability and stability of the sealing cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the exploded structure of the sealing cover in this case.

[0020] Figure 2 It is a structural schematic diagram of the key locking component of this case.

[0021] Figure 3It is a schematic diagram of the structure of the buttons in this case.

[0022] Figure 4 It is a structural schematic diagram of the face shell of this case.

[0023] Figure 5 It is a schematic diagram of the cross-sectional structure of the sealing cover in the unlocked state.

[0024] Figure 6 It is a schematic diagram of the cross-sectional structure of the sealing cover in this case in a locked state with the spring hidden.

[0025] Figure 7 It is a structural diagram of the locking parts.

[0026] Figure 8 It is a structural schematic diagram of the sealed can in this case in a locked state. DETAILED DESCRIPTION

[0027] The features of the present invention and other related features are further described in detail below through embodiments to facilitate understanding by those skilled in the art:

[0028] Embodiment 1

[0029] like Figures 1 to 7 As shown, a sealing cover comprises: a sealing cover bottom shell 1, a surface shell 2 installed above the sealing cover bottom shell 1, and a button 3 installed on the surface shell 2. A sealing ring 4 is installed around the outer periphery of the sealing cover bottom shell 1, and a double-lever type sealing lifting assembly 5 is installed inside the button 3 for driving the sealing cover bottom shell 1 to move and squeeze the sealing ring 4; wherein, the double-lever type sealing lifting assembly 5 comprises: a short lever 51 and a long lever 52, the short lever 51 and the long lever 52 are cross-hinged, and the tails of the short lever 51 and the long lever 52 are both provided with a barb 53, the sealing cover bottom shell 1 is provided with a clamping hole 11 for the barb 53 to be hooked therein, and the outer edge of the sealing ring 4 is in contact with the surface shell 2. In a specific implementation, the sealing ring 4 is a silicone sealing ring.

[0030] As described above, the present invention adopts a double-lever seal lifting assembly 5, including a cross-hinged design of a short lever 51 and a long lever 52. Compared with the traditional single-arm support or single-lever structure, the double-lever structure of the present invention can distribute the force more evenly and reduce the distortion, thereby ensuring the stability of the sealing cover during the sealing process and the reliability of the sealing effect. This design helps to prevent the problem of poor sealing effect caused by uneven force, and improves the overall sealing performance of the sealed can. Moreover, since the force of the double-lever seal lifting assembly 5 is more evenly applied, the risk of component wear and damage caused by concentrated force is reduced. Therefore, compared with the traditional single-lever structure, the sealing cover of the present invention has a longer service life and can maintain its sealing performance for a longer time. The sealing cover design of the present invention realizes easy switching between the sealed and non-sealed states through the cooperation of the button 3 and the double-lever seal lifting assembly 5, which is convenient to operate and is conducive to improving the user experience. The tails of the short lever 51 and the long lever 52 are both provided with barbs 53 which can be hooked into the clamping holes 11 of the sealing cover bottom shell 1, thereby ensuring the stability of the double-lever sealing lifting assembly 5 during operation, helping to prevent sealing failure caused by loose components, and further improving the reliability and stability of the sealing cover.

[0031] like Figure 1 , Figure 5 , Figure 6 As shown, the short lever 51 is a short double-arm lever with double-arm support, and the long lever 52 is a long double-arm lever with double-arm support; the short lever 51 has first shafts 511 protruding inwardly at both ends of its two arms, and the long lever 52 has oblong holes 521 in its two arms. The short lever 51 is assembled into the oblong holes 521 on both sides of the long lever 52 through its first shaft 511 to slide. Specifically, the short lever 51 is provided with two symmetrically arranged short support arms, and the long lever 52 is provided with two symmetrically arranged long support arms.

[0032] As described above, by adopting a double-arm short lever 51 and a double-arm long lever 52 with double-arm support, compared with a single-arm lever, the double-arm lever can disperse the pressure more effectively and reduce the situation where a single point is subjected to excessive force. On the one hand, it can avoid the problem of poor sealing effect caused by uneven force; on the other hand, it can also extend the service life of the sealing cover. Due to the stability of the lever structure and the optimization of force distribution, it helps to ensure the close contact between the sealing ring and the sealing surface, thereby improving the sealing effect and preventing air, moisture or other contaminants from entering the interior of the container. Among them, the short lever 51 is assembled into the oblong holes 521 on both sides of the long lever 52 through its first axis 511 to achieve sliding, which not only enhances the connection stability between the levers, but also makes the lever movement more flexible.

[0033] like Figure 1As shown, in a specific implementation, each support arm of the long lever 52 is raised near the top to form a support protrusion 523, and the support protrusion 523 forms a V-shaped support angle with the head of each support arm of the long lever 52. The head of each support arm of the long lever 52 is pressed by the key 3 when the key 3 is pressed.

[0034] As described above, the design of the V-shaped support angle enables the long lever 52 to better disperse the pressure when it is subjected to force, reducing the situation where a single point is subjected to excessive force, thereby enhancing the strength and stability of the entire lever structure. The provision of the support protrusion 523 further strengthens the support point of the lever, making the lever more stable during movement and reducing the risk of poor sealing due to vibration or shaking. A silicone pad 524 is provided at the head of each support arm so as to have good elasticity and ensure that the long lever 52 is in close contact with the sealing cover bottom shell 1 when the button 3 is pressed. In addition, the silicone pad 524 has a certain buffering effect and can also reduce the impact and vibration of the long lever 52 when it is subjected to force, prevent the long lever from being easily worn due to frequent pressing, and increase its service life.

[0035] like Figure 1 , Figure 3 , Figure 4 As shown, the face shell 2 extends downward from its bottom wall near the periphery to form a circle of top pressure ribs 21, and protrudes downward in the middle to form a first installation groove 22 for the key 3 to be installed therein, and a clamping strip 23 protrudes from the outer wall of the first installation groove 22, and the sealing cover bottom shell 1 protrudes upward in the middle to form a second installation groove 12 for the first installation groove 22 to swing into, and the inner side wall and bottom wall of the second installation groove 12 are upwardly provided with a clamping groove 13 that cooperates with the clamping strip 23; the clamping hole 11 is set in the second installation groove 12. In specific implementation, the sealing cover bottom shell 1 is provided with diffusely distributed first reinforcing ribs 14 on the periphery of the second installation groove 12, and the face shell 2 has a plurality of second reinforcing ribs 24 protruding inward on its top pressure ribs 21.

[0036] As described above, the setting of the top pressure rib 21 can squeeze and stretch the sealing ring downward when the key is pressed down, thereby enhancing the sealing effect. The setting of the first mounting groove 22 provides an independent mounting area for the key 3. The matching setting of the card strip 23 and the card slot facilitates the stable connection between the surface shell and the bottom shell, and is convenient for disassembly and assembly. The setting of the second mounting groove 12 provides a corresponding placement space for the first mounting groove 22. The setting of the first reinforcing rib 14 is to increase the structural strength of the bottom shell of the sealing cover. The setting of the second reinforcing rib 24 is to increase the structural strength of the surface shell and prevent deformation.

[0037] like Figure 1 , Figure 3 , Figure 4As shown, in a specific implementation, the sealing cover of this case further includes: a key locking assembly 6, the key locking assembly 6 includes: the key 3, a spring 61 for driving the key 3 to automatically reset after releasing an external force, a labyrinth groove structure 62 arranged inside the key 3, and a locking part 63 capable of limited movement along the labyrinth groove path of the labyrinth groove structure 62; the spring 61 is arranged between the key 3 and the face shell 2; the labyrinth groove structure 62 includes: a main body 621 formed by protruding downward from the key 3, a labyrinth groove part 622 formed on the main body 621, the labyrinth groove part 622 includes: a starting recess 623, a mounting protrusion 624 protruding from the main body 621, an end point recess 625 formed on the mounting protrusion 624, and a guide path 626 arranged around the mounting protrusion 624 and connected between the starting recess 623 and the end point recess 625;

[0038] When the button 3 is pressed downward, the locking part 63 moves upward relatively from the starting recess 623 along one side of the guide path 626; when the button 3 is released, the spring 61 is used to drive the button 3 to reset, and guide the locking part 63 to fall to the end recess 625, thereby achieving a self-locking state; when the button 3 is pressed again, the locking part 63 escapes from the end recess 625 and moves to the other side along the guide path 626, thereby achieving an unlocked state.

[0039] As mentioned above, the design of the labyrinth groove structure and the lock parts in this case makes the movement path of the lock parts in the labyrinth groove path more complicated, so that the lock parts are more difficult to be accidentally unlocked in the locked state, which improves the safety and stability of the sealed cans using the locking device and is conducive to ensuring the sealing performance. At the same time, the movement path of the lock parts in the labyrinth groove structure is clear and definite, and it is not easy to get stuck or fail, which helps to extend the service life of the switch. Moreover, the design of the labyrinth groove also increases the contact area and friction between the lock parts and the labyrinth groove structure, making the locked state more stable and not easy to be unlocked due to external interference. The locking device in this case is composed of a small number of parts such as buttons, springs, labyrinth groove structures and lock parts. Compared with other complex self-locking switch forms, the number of parts is less and the assembly process is simpler; and due to the small number of parts and simple design, the assembly efficiency of the labyrinth buckle self-locking switch is higher, which helps to reduce production costs and improve production efficiency. The labyrinth groove structure is built into the button, which effectively utilizes the limited space, making the design of the entire sealed can more compact and efficient. In addition, in the present solution, the user only needs to drive the locking parts to move in the maze groove structure through a simple pressing action to achieve locking and unlocking. The operation method is simple and clear, and does not require complicated operating steps or skills.

[0040] In addition, the design of the starting notch, the terminal notch, and the guide path of the labyrinth groove portion forms a complex labyrinth path, which greatly increases the movement complexity of the lock parts during the locking and unlocking process, thereby significantly improving the safety of the sealed cans suitable for the locking device. The setting of the mounting protrusion provides support for the terminal notch and increases the overall structural strength of the labyrinth groove portion, which helps to prevent deformation or damage caused by long-term stress during use, thereby improving the durability of the locking device. The guide path is arranged around the mounting protrusion. This layout allows the lock parts to be evenly stressed during movement, reduces wear or jamming caused by uneven stress, and further improves the stability of the lock.

[0041] like Figure 3 and Figure 4 As shown, in a specific implementation, the face shell 2 extends upward in the middle of the bottom wall of the installation groove 22 to form a vertical guide groove 25; the guide groove 25 has a guide ridge 26 protruding from one of the inner groove walls, and the main body 621 is provided with a guide groove 627 for the guide ridge 26 to move up and down along it. In this way, through the cooperation of the guide ridge and the guide groove, a clear guide is provided for the up and down movement of the key and its main body, ensuring the stability of the key during the pressing and releasing process, preventing the key from shifting or shaking during the operation, thereby improving the user's operating experience. The design of the guide ridge and the guide groove makes it easier to position the key and its main body during the installation process, can prevent the face shell and the key from being installed upside down, and play a fool-proof role. At the same time, it simplifies the installation process and improves operating efficiency.

[0042] like Figures 3 to 6 As shown, in a specific implementation, both sides of the main body 621 are provided with labyrinth grooves 622; the locking parts 63 are symmetrically provided with locking parts 631 on both sides thereof, which are respectively limited and moved along the labyrinth grooves 622 on both sides; the guide groove 25 has a plurality of supporting ribs 27 protruding outwards on its outer groove wall, and a strip-shaped opening 28 extending laterally is opened on its groove wall, the locking parts 63 are overlapped on the supporting ribs 27, and the locking parts 631 thereof pass through the strip-shaped opening 28 to the path of the labyrinth groove 622. In a specific implementation, the locking parts 631 pass through the strip-shaped opening 28 at the beginning of installation and fall into the starting notch of the labyrinth groove.

[0043] As described above, the labyrinth grooves on both sides are provided with matching lock parts, so that the connection of the lock parts on the main body is more stable, and the lock parts are effectively prevented from loosening or falling off due to external forces, thereby improving the stability of the locking. In addition, the labyrinth grooves on both sides can increase the structural strength of the main body, making it more able to withstand external pressure or impact. The support ribs are used to support the lock parts to prevent the lock parts from shaking randomly, so as to maintain the locked state or achieve the stability of the locking and unlocking process; on the other hand, the strength of the guide grooves is further enhanced to ensure the stability and durability of the overall structure. The strip-shaped opening is set to limit the lateral movement space of the lock part, ensuring that the lock part of the lock part can move smoothly along the strip-shaped opening in the path of the labyrinth groove part, thereby achieving the locking or unlocking function.

[0044] like Figure 3 and Figure 4 As shown, in a specific implementation, the side wall of the installation groove 22 is provided with a plurality of vertical guide openings 29, and the button 3 is provided with a guide protrusion 31 which is inserted into the vertical guide opening 29 and moves up and down along the vertical guide opening 29; the outer periphery of the bottom wall of the installation groove 22 is concave downward to form an annular limit groove 221, and the spring 61 is installed on the annular limit groove 221.

[0045] As described above, by opening a plurality of vertical guide openings on the side wall of the mounting groove and cooperating with each other, a stable guide path can be provided for the key. After the guide protrusion is inserted into the vertical guide opening, the key will be restricted by the vertical guide opening when it moves up and down, thereby avoiding shaking or deviation of the key during movement. The annular limit groove provides a clear installation position for the spring 2, ensuring the stability and accuracy of the spring during installation, so as to prevent the spring from deflecting or falling off during installation, thereby improving the reliability and durability of the entire structure. The design of the annular limit groove also simplifies the installation process of the spring 2. The installer can more easily place the spring in the correct position without the need for additional fixtures or tools, making installation more convenient.

[0046] Embodiment 2

[0047] like Figure 8As shown, a sealed can includes: a sealed can body 200 and the sealing cover 100 described in the first embodiment. In specific implementation, when the user presses the button downward, the long lever will also move downward because it is against the button, and the short lever will also be pressed downward under the drive of the long lever. The other ends of the two levers will tilt upward, and the long lever and the short lever have barbs at the tail to hook the holes on the bottom shell, thereby driving the bottom shell to move upward together, and the pressure ribs on the surface shell will press against the sealing ring to prevent foreign matter from entering. Moreover, when the bottom shell 1 of the sealing cover is driven upward, the sealing ring will interfere with the pressure ribs inside the surface shell to deform it, thereby squeezing the bottle body to form a sealed state.

[0048] In summary, the sealing cover includes a sealing cover bottom shell, a surface shell, a button and a double-lever sealing lifting assembly. The double-lever sealing lifting assembly is composed of a short lever and a long lever that are cross-hinged, both of which are double-arm support structures, which enhance the structural stability and force uniformity. The long lever is provided with a V-shaped support angle and a silicone pad, which improves the sealing effect and durability. The surface shell and the bottom shell are connected by a card strip and a card slot, and the structure is stable and easy to disassemble and assemble. The sealing cover is also provided with a button locking assembly, which adopts a maze groove structure and a locking part to improve safety and stability. The sealed can is composed of a sealed can body and a sealing cover, and the sealed and non-sealed states can be easily switched by button operation. The present invention has a compact structure, convenient operation, good sealing effect, and has broad application prospects.

[0049] As mentioned above, this case protects a sealing cover and a sealed can, and all technical solutions that are the same or similar to this case should be shown to fall within the scope of protection of this case.

Claims

1. A sealing cover, characterized in that: include: A sealing cover bottom shell (1), a surface shell (2) installed above the sealing cover bottom shell (1), and a button (3) installed on the surface shell (2); a sealing ring (4) is installed on the outer periphery of the sealing cover bottom shell (1); a double-lever type sealing lifting assembly (5) is installed inside the button (3) for driving the sealing cover bottom shell (1) to move to squeeze the sealing ring (4); wherein the double-lever type sealing lifting assembly (5) comprises: a short lever (51) and a long lever (52); the short lever (51) and the long lever (52) are cross-hinged; the tails of the short lever (51) and the long lever (52) are both provided with barbs (53); the sealing cover bottom shell (1) is provided with a clamping hole (11) for the barbs (53) to be hooked therein; and the outer edge of the sealing ring (4) is in contact with the surface shell (2).

2. The sealing cover according to claim 1, characterized in that: The short lever (51) is a short double-arm lever with double-arm support, and the long lever (52) is a long double-arm lever with double-arm support.

3. The sealing cover according to claim 2, characterized in that: The short lever (51) has first shafts (511) protruding inwardly at both ends of its arms, and the long lever (52) has oblong holes (521) opened in its arms. The short lever (51) is assembled into the oblong holes (521) on both sides of the long lever (52) through its first shaft (511) to achieve sliding.

4. The sealing cover according to claim 3, characterized in that: The long lever (52) has a protrusion near the top of each support arm thereof to form a support protrusion (523), and the support protrusion (523) forms a V-shaped support angle with the head of each support arm of the long lever (52); and when the key (3) is pressed, the head of each support arm of the long lever (52) is pressed by the key (3).

5. The sealing cover according to claim 1, characterized in that: The top shell (2) extends downward from its bottom wall near the periphery to form a circle of top pressure ribs (21), and protrudes downward from its middle to form a first installation groove (22) for the key (3) to be installed therein, and a clamping strip (23) protrudes from the outer wall of the first installation groove (22); the bottom shell (1) of the sealing cover protrudes upward from its middle to form a second installation groove (12) for the first installation groove (22) to be swung into, and a clamping groove (13) is provided on the bottom wall of the inner side wall of the second installation groove (12) to be engaged with the clamping strip (23); the clamping hole (11) is arranged in the second installation groove (12).

6. The sealing cover according to claim 5, characterized in that: Also includes: A key locking assembly (6), the key locking assembly (6) comprising: the key (3), a spring (61) for driving the key (3) to automatically reset after releasing an external force, a labyrinth groove structure (62) arranged inside the key (3), and a locking part (63) capable of limited movement along the labyrinth groove path of the labyrinth groove structure (62); the spring (61) is arranged between the key (3) and the housing (2); the labyrinth groove structure (62) comprises: a spring extending downward from the key (3) to the bottom of the key (3); a spring (61) ... A main body (621) formed by a protrusion, a labyrinth groove (622) formed on the main body (621), the labyrinth groove (622) comprising: a starting notch (623), a mounting protrusion (624) protruding from the main body (621), an end point notch (625) formed on the mounting protrusion (624), and a guide path (626) arranged around the mounting protrusion (624) and communicating between the starting notch (623) and the end point notch (625); When the button (3) is pressed downward, the locking part (63) moves upward relatively from the starting notch (623) along one side of the guide path (626); when the button (3) is released, the spring (61) is used to drive the button (3) to reset, guide the locking part (63) to fall to the end notch (625), and realize the self-locking state; when the button (3) is pressed again, the locking part (63) escapes from the end notch (625) and moves to the other side along the guide path (626), thereby realizing the unlocking state.

7. The sealing cover according to claim 6, characterized in that: The face shell (2) extends upwards in the middle of the bottom wall of the installation groove (22) to form a vertical guide groove (25); the guide groove (25) has a guide convex strip (26) protruding from one of the inner groove walls, and the main body (621) is provided with a guide groove (627) along which the guide convex strip (26) can move up and down.

8. The sealing cover according to claim 7, characterized in that: Both sides of the main body (621) are provided with labyrinth grooves (622); the locking parts (631) are symmetrically provided on both sides of the locking part (63) for limiting movement along the labyrinth grooves (622) on both sides; the guide groove (25) has a plurality of supporting ribs (27) protruding outwards on its outer groove wall, and a strip-shaped opening (28) extending transversely is opened on its groove wall; the locking part (63) is overlapped on the supporting ribs (27), and its locking part (631) passes through the strip-shaped opening (28) to the path of the labyrinth groove (622).

9. The sealing cover according to claim 8, characterized in that: The side wall of the installation groove (22) is provided with a plurality of vertical guide openings (29), and the button (3) is provided with a guide protrusion (31) which is inserted into the vertical guide opening (29) and moves up and down along the vertical guide opening (29); the outer periphery of the bottom wall of the installation groove (22) is concave downward to form an annular limiting groove (221), and the spring (61) is installed on the annular limiting groove (221).

10. A sealed can, characterized in that: include: A sealed can body (200) and a sealing cover (100) as claimed in any one of claims 1 to 9.

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