Sealing cover convenient to use and preservation box

Abstract

The utility model discloses a sealing cover convenient to use and a preservation box, and the sealing cover convenient to use comprises a panel, a sealing cover and a sealing cover, the cover ring is arranged around the panel and is in sealing connection with the panel, the cover ring is an elastic part, the side, facing the center of the box body, of the cover ring is integrally connected with a sealing ring and a pressing ring, and the sealing ring is suitable for being matched with the inner circumferential wall of the box body in an abutting mode and forms a closed cavity with the box body; and the one-way valve is arranged on the panel or the cover ring and used for extracting gas in the closed cavity, and when a gap exists between the sealing ring and the inner circumferential wall of the box body, the pressing ring can press the upper wall of the box body, so that the sealing performance of the joint of the cover ring and the box body is guaranteed. The one-way valve is used for extracting gas in the closed cavity after the sealing cover is closed, double sealing is arranged on the periphery of the sealing cover, the problem of gas leakage caused by lifting of the sealing ring in the vacuumizing process is effectively prevented, the sealing reliability and the vacuumizing efficiency are remarkably improved, the one-way valve has a self-sealing function in a natural state, and the overall sealing performance is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sealed containers, in particular to a sealing cover that is easy to use and a fresh-keeping box with the sealing cover that is easy to use. Background Art

[0002] In modern life and industrial production, vacuum technology is widely used in a variety of fields, including food preservation, pharmaceutical packaging, and precision instrument protection. Vacuuming effectively removes oxygen and other gases from containers, thereby extending the shelf life of items, preventing oxidation and microbial growth, and maintaining the quality and freshness of the items. Therefore, as a key component in achieving vacuuming, the performance of the sealing cap directly affects the effectiveness and reliability of the vacuuming process.

[0003] In related technologies, an elastically deformable sealing ring is installed around the perimeter of the sealing cover, elastically sealing against the peripheral wall of the box body. This design can achieve sealing to a certain extent, but during the vacuuming process, the sealing ring generates a suction force toward the vacuuming area, causing the bottom of the sealing ring to lift toward the vacuuming area, resulting in air leakage at the lifted part. This not only reduces the efficiency of vacuuming, but in severe cases, it can also cause the vacuuming operation to fail. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides an easy-to-use sealing cover that extracts gas from the sealed chamber after the cover is closed through a one-way valve, and provides a double seal around the periphery of the sealing cover, effectively preventing air leakage caused by the sealing ring being lifted during vacuuming, significantly improving sealing reliability and vacuuming efficiency. In addition, the one-way valve has a self-sealing function in its natural state, further improving the overall sealing performance and preventing the problem of water seepage. The present invention has good market application prospects.

[0005] The utility model also provides a fresh-keeping box with the sealing cover which is easy to use.

[0006] The sealing cover according to the utility model is used to cover the box body and includes:

[0007] panel;

[0008] a cover ring, disposed around the panel and sealed with the panel, the cover ring being an elastic member, a sealing ring and a compression ring being integrally connected to a side of the cover ring facing the center of the box body, the sealing ring being adapted to press fit with the inner circumferential wall of the box body and forming a closed cavity with the box body;

[0009] A one-way valve is arranged on the panel or the cover ring. The one-way valve is used to extract the gas from the closed cavity. When a gap appears between the sealing ring and the inner wall of the box body, the clamping ring can press the upper wall of the box body to ensure the sealing of the connection between the cover ring and the box body.

[0010] The easy-to-use sealing cover of the present invention has at least the following beneficial effects: by sealingly connecting the cover ring around the panel, and integrally connecting the sealing ring and the pressure ring on the cover ring, and equipping the cover ring with a one-way valve for extracting the gas in the closed cavity, this design cleverly utilizes the interference fit between the sealing ring and the peripheral wall of the box body, and the close contact between the pressure ring and the upper wall of the box body, thereby forming a double sealing mechanism; in application, when the one-way valve is used to extract the air in the box body, the sealing ring first forms a tight interference fit with the inner peripheral wall of the box body to ensure the initial sealing effect; however, during the vacuuming process, the sealing ring may form a tight interference fit with the inner peripheral wall of the box body, thereby ensuring ... This causes the bottom of the sealing ring to lift up to one side of the extraction point, resulting in air leakage at the lifted point. At this time, the role of the compression ring becomes particularly important. The compression ring is fitted and connected to the upper wall of the box body to form a second sealing line of defense. Accordingly, even if the sealing ring is partially lifted up, the compression ring can still press the upper wall of the box body to ensure the stability and reliability of the entire sealing system. This improvement significantly improves the sealing effect during the vacuuming process, avoids the common air leakage problem of traditional sealing methods, thereby improving the efficiency and success rate of vacuuming, which is of great significance for extending the food preservation effect and ensuring the safety of packaging.

[0011] According to the easy-to-use sealing cover described in some embodiments of the present invention, the sealing ring is tilted toward a side away from the center of the cover ring.

[0012] According to the easy-to-use sealing cover described in some embodiments of the present invention, the sealing ring includes an arc-shaped sealing portion and a spherical sealing portion, the arc-shaped sealing portion extends outward and bends upward, the spherical sealing portion is integrally connected to the end of the arc-shaped sealing portion, and the spherical sealing portion and the inner circumferential wall of the box body are spherically pressed together.

[0013] According to the easy-to-use sealing cover described in some embodiments of the present invention, one end of the clamping ring is connected to the cover ring, and the other end of the clamping ring is arranged downwardly and tilted along the side away from the center of the panel; when the cover ring is combined to compress the box body, the two side surfaces of the clamping ring are respectively fitted and connected with the lower wall of the cover ring and the upper wall of the box body.

[0014] According to the easy-to-use sealing cover described in some embodiments of the present invention, the panel is provided with a mounting hole, and the peripheral wall of the one-way valve is provided with a clamping groove. The groove wall of the clamping groove and the hole wall of the mounting hole are elastically fitted to clamp the panel and can drive the mounting hole into a sealed state.

[0015] According to the easy-to-use sealing cover described in some embodiments of the present invention, the distance between the top surface and the bottom surface of the clamping groove gradually decreases toward the side away from the center of the one-way valve to respectively press the top surface and the bottom surface of the panel.

[0016] According to the easy-to-use sealing cover described in some embodiments of the present invention, a ventilation channel is provided between the side of the clamping groove and the hole wall of the mounting hole, and an elastic protrusion is provided on the bottom surface of the clamping groove, and the elastic protrusion is suitable for pressing against the bottom surface of the panel to drive the top surface of the clamping groove to press against the top surface of the panel for sealing.

[0017] According to the easy-to-use sealing cover described in some embodiments of the present invention, when the one-way valve is matched with the air pump, the elastic protrusion can be pressed and deformed by the bottom surface of the panel, driving the one-way valve to move upward and extract the gas from the closed cavity through the ventilation channel.

[0018] According to the easy-to-use sealing cover described in some embodiments of the present invention, the elastic protrusion has a spherical surface, and the bottom surface of the elastic protrusion is provided with a deformation groove, which is suitable for allowing the elastic protrusion to be concave.

[0019] The fresh-keeping box according to the utility model comprises the sealing cover which is easy to use according to the utility model.

[0020] The fresh-keeping box according to the utility model has at least the following beneficial effects: the fresh-keeping box with the advantages of the above-mentioned easy-to-use sealing lid has higher sealing effect and reliability during the vacuuming process. Through the double sealing mechanism and optimized one-way valve design, the fresh-keeping box can effectively prevent air leakage, extend the shelf life of food, ensure the safety of packaging, and improve the user experience and satisfaction.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 A schematic cross-sectional view of a sealing cover for use in accordance with an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the overall structure of the sealing cover that is easy to use according to the embodiment of the utility model;

[0025] Figure 3A schematic cross-sectional view of a fresh-keeping box that is easy to use according to an embodiment of the present utility model;

[0026] Figure 4 This is an overall schematic diagram of a fresh-keeping box that is easy to use according to an embodiment of the utility model;

[0027] Figure 5 This is a schematic cross-sectional view of a sealing cover for use in another embodiment of the present invention;

[0028] Figure 6 A schematic structural diagram of a one-way valve of a sealing cover for easy use in an embodiment of the utility model;

[0029] Figure 7 This is a schematic structural diagram of a one-way valve of a sealing cover for easy use in another embodiment of the utility model;

[0030] Figure 8 This is a schematic diagram of the overall structure of a sealing cover that is easy to use in another embodiment of the present invention;

[0031] Figure 9 This is an overall schematic diagram of a fresh-keeping box that is easy to use according to another embodiment of the present invention.

[0032] Description of Figure Numbers:

[0033] Panel 100; mounting hole 101;

[0034] Cover ring 200; exhaust hole 201; sealing ring 230; arc-shaped sealing portion 231; spherical sealing portion 232; pressing ring 240;

[0035] Rotating block 300; blocking protrusion 310;

[0036] Box body 400; closed cavity 401;

[0037] One-way valve 500; clamping groove 501; ventilation channel 502; elastic protrusion 510; deformation groove 5101. DETAILED DESCRIPTION

[0038] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0039] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0040] In the description of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0041] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0042] In the description of the present invention, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0043] In modern life and industrial production, vacuum technology is widely used in a variety of fields, including food preservation, pharmaceutical packaging, and precision instrument protection. Vacuuming effectively removes oxygen and other gases from containers, thereby extending the shelf life of items, preventing oxidation and microbial growth, and maintaining the quality and freshness of the items. Therefore, as a key component in achieving vacuuming, the performance of the sealing cap directly affects the effectiveness and reliability of the vacuuming process.

[0044] In related technologies, an elastically deformable sealing ring is installed around the perimeter of the sealing cover, elastically sealing against the peripheral wall of the box body. This design can achieve sealing to a certain extent, but during the vacuuming process, the sealing ring generates a suction force toward the vacuuming area, causing the bottom of the sealing ring to lift toward the vacuuming area, resulting in air leakage at the lifted part. This not only reduces the efficiency of vacuuming, but in severe cases, it can also cause the vacuuming operation to fail.

[0045] For this reason, Figures 1 to 4 As shown, the sealing cover proposed by the present invention is easy to use and includes a panel 100, a cover ring 200 arranged around the panel 100 and sealed with the panel 100, and a one-way valve 500 arranged on the panel 100 or the cover ring 200. The cover ring 200 is an elastic component, and a sealing ring 230 and a pressure ring 240 are integrally connected to the side of the cover ring 200 facing the center of the box body 400. Optionally, the cover ring 200, the sealing ring 230 and the pressure ring 240 are all made of silicone and are integrally molded. In use, the sealing ring 230 is suitable for press-fitting with the inner circumferential wall of the box body 400 and forming a closed cavity 401 with the box body 400. Furthermore, the one-way valve 500 is used to extract gas from the closed cavity 401, and when a gap appears between the sealing ring 230 and the inner circumferential wall of the box body 400, the pressure ring 240 can press the upper wall of the box body 400 to ensure the sealing of the connection between the cover ring 200 and the box body 400. It should be noted that, by sealingly connecting the cover ring 200 around the panel 100, and integrally connecting the sealing ring 230 and the pressure ring 240 on the cover ring 200, and equipping the one-way valve 500 for extracting the gas in the closed cavity 401, this design cleverly utilizes the interference fit between the sealing ring 230 and the inner peripheral wall of the box body 400, as well as the close contact between the pressure ring 240 and the upper wall of the box body 400, to form a double sealing mechanism; in application, when the one-way valve 500 is used to extract the air in the box body 400, the sealing ring 230 first forms a tight interference fit with the inner peripheral wall of the box body 400 to ensure the initial sealing effect; however, during the vacuuming process, it may This causes the bottom of the sealing ring 230 to be lifted toward one side of the extraction point, thereby causing air leakage at the lifted point. At this time, the role of the clamping ring 240 becomes particularly important. The clamping ring 240 is fitted and connected to the upper wall of the box body 400 to form a second sealing line of defense. Accordingly, even if the sealing ring 230 is partially lifted, the clamping ring 240 can still press the upper wall of the box body 400 to ensure the stability and reliability of the entire sealing system. This improvement significantly improves the sealing effect during the vacuuming process, avoids the common air leakage problem of traditional sealing methods, thereby improving the efficiency and success rate of vacuuming, which is of great significance for extending the food preservation effect and ensuring the safety of packaging.

[0046] Refer again Figure 3In some embodiments of the present invention, the sealing ring 230 is tilted toward the side away from the center of the cover ring 200. This allows the sealing ring 230 to better adapt to the shape of the box body 400 when in contact with the inner circumferential wall of the box body 400, increasing the contact area and sealing pressure, thereby further improving the sealing effect. Particularly during vacuuming, this tilted design can effectively resist inward suction, reduce the risk of lifting the sealing ring 230, and ensure a reliable seal. Optionally, the inner circumferential wall of the box body 400 gradually narrows downward, allowing it to gradually and tightly fit the inner circumferential wall of the box body 400 when the sealing cover is closed.

[0047] In some applications, the sealing cover is provided with an elastic ring portion at the bottom, and the elastic ring portion is pressed against the inner peripheral wall of the box body to achieve sealing. However, the existing elastic ring portion is a stepped structure, such as an "I" shape or an inverted "T" shape (not shown in the figure). During use, the pressing effect of the cover ring against the inner peripheral wall of the box body is unstable. Due to the closing force and the wrinkles of the elastic ring portion, the pressing will cause the elastic ring portion to produce various deformation effects, thereby affecting the sealing performance. In some embodiments of the present invention, referring to Figure 1 and Figure 3The sealing ring 230 includes an arcuate sealing portion 231 and a spherical sealing portion 232. The arcuate sealing portion 231 extends outward and curves upward. The spherical sealing portion 232 is integrally connected to the end of the arcuate sealing portion 231. The spherical sealing portion 232 forms a spherical pressure fit with the inner circumferential wall of the box body 400. In this regard, on the one hand, the arcuate sealing portion 231 has good deformation performance, which can better drive the spherical sealing portion 232 to form an interference fit with the inner circumferential wall of the box body 400 when the sealing cover is pressed together. The design of the spherical sealing portion 232 increases the contact points between the sealing ring 230 and the inner circumferential wall of the box body 400, enhancing the adaptability and flexibility of the seal. On the other hand, the spherical fit and abutment design further reduces the gap between the sealing ring 230 and the inner circumferential wall of the box body 400, thereby improving the stability of the seal. It should be noted that the spherical sealing portion 232 at the end always maintains a closed loop with the inner circumferential wall of the box body 400, and will not be disconnected at a certain section of the loop to weaken the sealing effect. Even if a small amount is lifted toward the one-way valve 500, the spherical sealing portion 232 can still fit tightly with the inner circumferential wall of the box body 400, further improving the sealing effect of the sealing ring 230. Furthermore, one end of the clamping ring 240 is connected to the cover ring 200, and the other end of the clamping ring 240 is arranged downwardly and tilted along the side away from the center of the panel 100. In use, when the cover ring 200 covers and compresses the box body 400, the two side surfaces of the clamping ring 240 are respectively connected to the lower wall of the cover ring 200 and the upper wall of the box body 400. It should be noted that during manufacturing applications, the upper edge of the box body 400 cannot be machined to be on the same plane. Since the sealing cover may be tilted during the closing operation, if the cover ring 200 is directly pressed against the upper wall of the box body 400 for sealing, the cover ring 200 will not be able to tightly adhere to the entire upper wall of the box body 400, resulting in a gap. To address this, a clamping ring 240 is provided on the lower side of the cover ring 200. The inclined design of the clamping ring 240 allows it to deform and press against the upper wall of the box body 400 when the cover ring 200 is pressed downward, which can more evenly distribute pressure, ensure a close fit with the upper wall of the box body 400, and further enhance the effectiveness of the second line of defense. Furthermore, even if the sealing ring 230 is partially lifted, the clamping ring 240 can still maintain stable sealing performance, ensuring the reliability of the overall sealing system.

[0048] In some embodiments, the one-way valve is provided on the cover ring (not shown in the figure). Figures 2 to 5As shown, the one-way valve 500 is arranged on the panel 100. Optionally, the panel 100 is made of a rigid material, such as glass, so that the one-way valve 500 has higher stability after installation. Specifically, a mounting hole 101 is provided in the middle of the panel 100, and a clamping groove 501 is provided on the peripheral wall of the one-way valve 500. The groove wall of the clamping groove 501 and the hole wall of the mounting hole 101 are elastically sleeved to clamp the panel 100 and drive the mounting hole 101 into a sealed state, which not only simplifies the installation process of the one-way valve 500, but also ensures the sealing between the one-way valve 500 and the panel 100, preventing gas from leaking from the mounting hole 101 during the vacuuming process. The elastic sleeve design makes the one-way valve 500 more convenient to install and disassemble, and also ensures stability and reliability in long-term use. It should be noted that conventional one-way valves are generally arranged to float along the thickness of the panel. For example, the one-way valve's peripheral wall is provided with a mounting groove whose width is greater than the panel's thickness (not shown in the figure). Consequently, the one-way valve does not provide active sealing, but only passively seals when negative pressure is generated within the box. However, this passive seal is relatively poor, and various factors can disrupt its sealing during use. For example, steam from hot rice stored in the box can leak through the one-way valve. Another example is liquid stored in the box, and when the box is tilted or turned, the liquid can flow out of the one-way valve, disrupting its sealing and, in turn, destroying the negative pressure within the box. In this embodiment, the clamping groove 501 provided on the peripheral wall of the one-way valve 500 has a minimum width, under normal conditions, that is less than the thickness of the panel 100. Consequently, once installed, the one-way valve 500 can clamp onto the panel 100, providing an active seal against the panel 100 and further improving the sealing performance. In particular, it can effectively prevent water from breaching the seal between the one-way valve 500 and the panel 100.

[0049] In some embodiments, the one-way valve 500 presses and seals against both the top and bottom surfaces of the panel 100. When the gas in the closed cavity 401 is extracted through the one-way valve 500, the top wall of the clamping groove 501 is opened, thereby extracting the gas in the closed cavity 401. Figure 3 and Figure 6 In some embodiments of the present invention, the distance between the top and bottom surfaces of the clamping groove 501 gradually decreases toward the side away from the center of the one-way valve 500, so as to respectively press the top and bottom surfaces of the panel 100. It is easy to understand that the bottom surface of the clamping groove 501 does not completely fit with the bottom surface of the panel 100 in the entire annular surface. At the position where the annular surface is vacant, when the air is pumped out, the gas in the closed cavity 401 breaks through and lifts up the top wall of the clamping groove 501 and is pumped out. In addition, in some embodiments, the top surface of the clamping groove 501 does not fit with the top surface of the panel 100 in its entirety, but only fits with the top surface of the panel 100 along the outer circumference of the top surface of the clamping groove 501. As a result, it is easier to be lifted up and the gas is discharged during the pumping.

[0050] In some embodiments, the one-way valve 500 presses against the top surface of the panel 100 to seal. When the gas in the closed cavity 401 is extracted through the one-way valve 500, the one-way valve 500 moves upward, thereby extracting the gas in the closed cavity 401. Figure 5 and Figure 7As shown, in some embodiments of the present invention, a ventilation channel 502 is provided between the side of the clamping groove 501 and the hole wall of the mounting hole 101, and the bottom surface of the clamping groove 501 is provided with an elastic protrusion 510. The elastic protrusion 510 is suitable for pressing against the bottom surface of the panel 100 to drive the top surface of the clamping groove 501 to press and seal against the top surface of the panel 100. It is easy to understand that the design of the elastic protrusion 510 can further increase the force of the top wall of the clamping groove 501 pressing against the top surface of the panel 100, thereby improving the sealing effect. The overall design not only provides a path for gas circulation, but also ensures the sealing and usability between the one-way valve 500 and the panel 100 through the pressing effect of the elastic protrusion 510. Specifically, the design of the ventilation channel 502 allows the gas to have a specific circulation path, and the elastic protrusion 510 plays a role in contraction and deformation during the extraction process, allowing the gas to be discharged smoothly through the one-way valve 500. Optionally, the elastic protrusion is a sheet-like structure (not shown). The sheet-like elastic protrusion is upwardly tilted and can bend downward during vacuuming, causing the entire one-way valve to move upward. In some applications, when the one-way valve 500 is used in conjunction with an air extraction pump, the elastic protrusion 510 can press against the bottom surface of the panel 100 and deform, driving the one-way valve 500 upward and extracting gas from the closed cavity 401 through the vent channel 502. This dynamic sealing design allows the one-way valve 500 to automatically adjust its position during the vacuuming process, ensuring smooth gas discharge while preventing external air from entering. Furthermore, after vacuuming is completed, the one-way valve 500 presses down on the top surface of the panel 100 to seal it, both under the negative pressure of the box body 400 and under the resetting action of the elastic protrusion 510. Therefore, the deformability of the elastic protrusion 510 enables the one-way valve 500 to maintain good sealing performance under different operating conditions, improving the efficiency and reliability of vacuuming. Optionally, the elastic protrusion 510 has a spherical surface, and the bottom surface of the elastic protrusion 510 is provided with a deformation groove 5101, which is suitable for the elastic protrusion 510 to be concave. It is easy to understand that the spherical design of the surface of the elastic protrusion 510 allows it to evenly distribute pressure when subjected to force, reducing local stress concentration, thereby improving the stability and reliability of the seal. Moreover, when the spherical surface contacts the bottom surface of the panel 100, it can better adapt to minor unevenness of the panel 100, ensuring the sealing of the contact surface. At the same time, the spherical design can also reduce friction and extend the service life of the elastic protrusion 510. In addition, the spherical surface of the elastic protrusion 510 allows the entire one-way valve 500 to move upward smoothly without tilting when extracting gas, ensuring the extraction effect. Furthermore, the deformation groove 5101 provided on the bottom surface further enhances the deformation ability of the elastic protrusion 510.When the one-way valve 500 works in conjunction with the vacuum pump, the elastic protrusion 510 will be pressed and deformed by the bottom surface of the panel 100. The deformation groove 5101 provides sufficient space so that the elastic protrusion 510 can effectively sink when subjected to greater pressure, ensuring that the sealing effect is not affected. This design not only improves the sealing performance of the one-way valve 500 under different working conditions, but also can maintain a good sealing effect after multiple uses, thereby extending the service life of the one-way valve 500.

[0051] In some applications, when the user wants to reopen the sealing cover after pumping out the air, he manually lifts up a corner of the top of the one-way valve 500 to connect the closed cavity 401 to the outside air and destroy the negative pressure state inside the box body 400. However, the negative pressure state inside the box body 400 can only be gradually destroyed when opening, and the opening time is not standard. If the opening angle is too small or the opening time is too short, the negative pressure state inside the box body 400 will not be completely destroyed. If the user lets go too quickly, the negative pressure state inside the box body 400 will cause the one-way valve 500 to self-prime, causing it to press against the seal again, which is not a good experience for the user. In this regard, refer to Figure 2 、 Figure 4 、 Figure 8 and Figure 9A rotating block 300 is provided at a corner position, a middle position of a long side, or a middle position of a short side of the cover ring 200, wherein the rotating block 300 is made of the same material as the cover ring 200 and is integrally formed. In addition, one end of the rotating block 300 is integrally connected to the cover ring 200, and the other end is rotatably matched with the cover ring 200. Specifically, the cover ring 200 is provided with an exhaust hole 201, and the rotating block 300 is provided with a blocking protrusion 310 integrally connected to the rotating block 300, and the blocking protrusion 310 is provided corresponding to the exhaust hole 201. In a specific application, the rotating block 300 is suitable for rotating along the side away from the center of the panel 100 to drive the blocking protrusion 310 to block the exhaust hole 201; the rotating block 300 is suitable for rotating along the side toward the center of the panel 100 to drive the blocking protrusion 310 to disengage from the exhaust hole 201. Furthermore, the rotating block 300 is used to drive the closed cavity 401 to communicate with the outside without operating the one-way valve 500. After the rotating block 300 is rotated to open, the closed cavity 401 can be kept in communication with the outside, ensuring that the negative pressure state of the closed cavity 401 is destroyed, making it easier for the user to open the sealing cover. In addition, it should be noted that the blocking protrusion 310 and the exhaust hole 201 can both undergo elastic deformation, and the sealing effect is better after blocking. In addition, when the user generally closes the cover, the hand is located on one side of the center of the panel 100. After pressing the sealing cover to close, the hand moves away from the center of the panel 100. At this time, the hand can maintain the same movement direction to operate the rotating block 300, blocking the exhaust hole 201, and realizing the sealing function of the cover. Similarly, when opening the lid, the user moves their hand from the outside of the sealing cover toward the center of the panel 100 and lifts the sealing cover upward. At this point, the user manipulates the rotating block 300 to move toward the center of the panel 100, opening the vent 201 to break the vacuum seal. The user can then maintain the same movement direction to open or lift the sealing cover. By optimizing the position and rotation direction of the rotating block 300, user operation is more convenient.

[0052] like Figure 3 、 Figure 4 and Figure 9 According to an embodiment of the present invention, the fresh-keeping box includes a convenient sealing cover according to an embodiment of the present invention. The fresh-keeping box with the advantages of the convenient sealing cover has a higher sealing effect and reliability during the vacuuming process. Through the double sealing mechanism and the optimized one-way valve 500 design, the fresh-keeping box can effectively prevent air leakage, extend the shelf life of food, ensure the safety of packaging, and improve the user experience and satisfaction.

[0053] Other structures and operations of the fresh-keeping box according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0054] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A convenient sealing cover for closing the box body, characterized in that: include: panel; a cover ring, disposed around the panel and sealed with the panel, the cover ring being an elastic member, a sealing ring and a compression ring being integrally connected to a side of the cover ring facing the center of the box body, the sealing ring being adapted to press fit with the inner circumferential wall of the box body and forming a closed cavity with the box body; A one-way valve is arranged on the panel or the cover ring. The one-way valve is used to extract the gas from the closed cavity. When a gap appears between the sealing ring and the inner wall of the box body, the clamping ring can press the upper wall of the box body to ensure the sealing of the connection between the cover ring and the box body.

2. The easy-to-use sealing cap according to claim 1, characterized in that: The sealing ring is tilted toward a side away from the center of the cover ring.

3. The easy-to-use sealing cover according to claim 2, characterized in that: The sealing ring includes an arc-shaped sealing portion and a spherical sealing portion. The arc-shaped sealing portion extends outward and bends upward. The spherical sealing portion is integrally connected to the end of the arc-shaped sealing portion. The spherical sealing portion and the inner peripheral wall of the box body are spherically pressed together.

4. The easy-to-use sealing cap according to any one of claims 1 to 3, characterized in that: One end of the clamping ring is connected to the cover ring, and the other end of the clamping ring is arranged downwardly along the side away from the center of the panel; when the cover ring is combined to compress the box body, the two side surfaces of the clamping ring are respectively fitted and connected with the lower wall of the cover ring and the upper wall of the box body.

5. The easy-to-use sealing cap according to claim 1, characterized in that: The panel is provided with a mounting hole, and the peripheral wall of the one-way valve is provided with a clamping groove. The groove wall of the clamping groove and the hole wall of the mounting hole are elastically sleeved to clamp the panel and can drive the mounting hole into a sealed state.

6. The easy-to-use sealing cap according to claim 5, characterized in that: The distance between the top surface and the bottom surface of the clamping groove gradually decreases toward the side away from the center of the one-way valve, so as to respectively press the top surface and the bottom surface of the panel.

7. The easy-to-use sealing cap according to claim 5, characterized in that: A ventilation channel is provided between the side surface of the clamping groove and the hole wall of the mounting hole, and an elastic protrusion is provided on the bottom surface of the clamping groove. The elastic protrusion is suitable for pressing against the bottom surface of the panel to drive the top surface of the clamping groove to press and seal against the top surface of the panel.

8. The easy-to-use sealing cap according to claim 7, characterized in that: When the one-way valve cooperates with the air pump, the elastic protrusion can be pressed against the bottom surface of the panel to deform, driving the one-way valve to move upward and extracting the gas in the closed cavity through the ventilation channel.

9. The easy-to-use sealing cap according to claim 7 or 8, characterized in that: The elastic protrusion has a spherical surface, and a deformation groove is provided on the bottom surface of the elastic protrusion. The deformation groove is suitable for the elastic protrusion to be concave.

10. Fresh-keeping box, characterized by: The utility model comprises a sealing cover which is easy to use as claimed in any one of claims 1 to 9.

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