Fresh-keeping packaging cover with high sealing function

Abstract

The utility model relates to a fresh-keeping packaging cover with a high sealing function, which comprises a top cover, a base and a membrane opening piece, the top cover is screwed on the base, a sealing ring is arranged on the inner wall of the top of the top cover, the top of the base is tightly pressed between the sealing ring and the side wall of the top cover, and the membrane opening piece is arranged on the top cover. A first interference sealing structure is arranged between the inner side wall face of the top of the base and the sealing ring, and a second interference sealing structure is arranged between the outer side wall face of the top of the base and the side wall of the top cover. A driving part is arranged on the inner wall of the top of the top cover, a sealing diaphragm is arranged at the position of an opening in the bottom of the base, a cavity is defined by the inner wall of the top of the top cover, the inner wall of the driving part and the top face of the sealing diaphragm, and the diaphragm opening part can move up and down and can be arranged between the outer wall of the driving part and the inner wall of the base in a circumferential rotation mode. The driving piece can push the membrane opening piece to rotate and move downwards and cut the sealing membrane open. The combined cover solves the technical problem that a combined cover is poor in sealing effect.

Description

Technical Field

[0001] The utility model relates to the field of packaging containers, and further to a fresh-keeping packaging cover with a high sealing function, and in particular to a fresh-keeping packaging cover with a high sealing function and a sealed chamber which can be filled with powder, granules or liquid separately. Background Art

[0002] At present, a combination lid with a separate sealed storage space has appeared on the beverage market. Its working principle is: basic raw materials (such as solid powder, concentrated liquid, medicine or probiotics, etc.) are filled into a lid with a separate sealed chamber to achieve storage and preservation of the basic raw materials. The container under the lid and matching the lid is filled with pure water or basic solution for mixing with or dissolving the basic raw materials. When drinking, the sealed chamber is opened through the switch mechanism set on the lid, and the basic raw materials are put into the packaging container below. After being fully shaken, it can be directly drunk.

[0003] Since the basic raw materials stored in the closed chamber are mostly food-grade raw materials, they will deteriorate if they are in contact with air for a long time. Therefore, high requirements are placed on the sealing of the chamber. However, the existing combination lids are mostly assembled in a pressing manner, which may result in insufficient sealing, causing product deterioration, affecting product quality and consumers' usage experience.

[0004] With regard to the problem of poor sealing effect of combined lids with separate sealed storage spaces in the related art, no effective solution has been given so far.

[0005] Therefore, the inventor, relying on his many years of experience and practice in related industries, proposes a fresh-keeping packaging cover with a high sealing function to overcome the defects of the prior art. Utility Model Content

[0006] The utility model aims to provide a fresh-keeping packaging cover with a high sealing function, which can realize multi-level interference sealing between the top cover of the packaging cover and the top contact position of the base and on the top inner wall, outer wall and top end surface of the base, thereby avoiding deformation of the top of the base caused by the single-sided sealing structure and affecting the sealing effect, increasing the sealing contact area between the top cover and the top of the base, and improving the sealing effect of the packaging cover.

[0007] The purpose of the utility model can be achieved by the following scheme:

[0008] The utility model provides a fresh-keeping packaging cover with a high sealing function, which is used to be arranged at the opening of a container body, and the fresh-keeping packaging cover with a high sealing function comprises a top cover, a base and a diaphragm opening member, the top cover is screwed on the base, and a sealing ring is arranged on the top inner wall of the top cover and on the inner side of the top cover side wall, and when the top cover and the base are assembled, the top of the base is pressed tightly between the sealing ring and the top cover side wall, and a first interference sealing structure is provided between the top inner side wall surface of the base and the sealing ring, and a second interference sealing structure is provided between the top outer side wall surface of the base and the top cover side wall;

[0009] A cylindrical driving member with a top seal and a bottom opening is vertically arranged on the top inner wall of the top cover, and a sealing film is arranged at the bottom opening of the base. A chamber for accommodating materials is formed between the top inner wall of the top cover, the inner wall of the driving member and the top surface of the sealing film. The film opening member can move up and down and can rotate circumferentially between the outer wall of the driving member and the inner wall of the base. When the top cover is in a screwed upward state, the driving member pushes the film opening member to rotate downward and cut the sealing film.

[0010] In a preferred embodiment of the present invention, the first interference seal structure includes an annular first sealing rib arranged on the outer side wall of the sealing ring along the circumference of the sealing ring, and the first sealing rib presses the top inner side wall of the base.

[0011] In a preferred embodiment of the present invention, the second interference sealing structure includes an annular second sealing rib arranged on the top cover side wall along the circumference of the top cover side wall, and the second sealing rib presses the top outer wall surface of the base.

[0012] In a preferred embodiment of the present invention, a third interference sealing structure is provided between the top end surface of the base and the top inner wall of the top cover.

[0013] In a preferred embodiment of the present invention, the third interference sealing structure includes an annular third sealing rib arranged on the top inner wall of the top cover along the circumference of the top cover, and the third sealing rib presses the top end surface of the base.

[0014] In a preferred embodiment of the present invention, the diaphragm opening member is a vertically arranged cylindrical structure with openings at both ends, the bottom of the diaphragm opening member is provided with cutting teeth, and the diaphragm opening member can move up and down and can rotate circumferentially so as to be sleeved on the outer side of the driving member;

[0015] A driving structure for driving the diaphragm opening member to rotate and move downward is arranged between the driving member and the diaphragm opening member, and the driving structure includes at least one driving column arranged on the outer wall of the driving member and a driving track arranged on the inner wall of the diaphragm opening member. The top cover is in a screwed upward state, and the driving track abuts against the driving column and pushes the driving column to slide from bottom to top along the driving track to push the diaphragm opening member to rotate and move downward.

[0016] In a preferred embodiment of the present invention, the number of the cutting teeth is two, and the two cutting teeth are non-radially symmetrically arranged on the diaphragm opening member.

[0017] In a preferred embodiment of the present invention, a push plate is provided at the bottom of the film opening member and at least on one side of the cutting teeth to push the sealing film downward to open after the cutting teeth cut the sealing film.

[0018] In a preferred embodiment of the present invention, an annular thin-walled area is provided on the sealing film and near its annular outer edge, the thickness of the thin-walled area is less than the thickness of the sealing film body, and in the vertical direction, the cutting teeth are opposite to the thin-walled area;

[0019] The thin-walled area includes a connected cutting section and a retaining section, and the cutting teeth cut the sealing film along the cutting section.

[0020] In a preferred embodiment of the present invention, the inner wall of the top cover and the outer wall of the base are provided with internal threads and external threads that are threadedly connected with each other.

[0021] In a preferred embodiment of the present invention, a first guide thread is provided on the outer wall of the diaphragm opening member, a second guide thread is provided on the inner wall of the base, and the diaphragm opening member and the base are screwed together through the first guide thread and the second guide thread;

[0022] The number of groups of the first guide thread and the second guide thread is greater than or equal to the number of groups of the internal thread and the external thread.

[0023] In a preferred embodiment of the present invention, the first guide thread and the second guide thread are provided with matching limiting notches and limiting blocks, and the limiting blocks can be embedded in the notches to limit the initial position of the diaphragm opening member.

[0024] In a preferred embodiment of the present invention, an annular flange is formed at the bottom of the base along its circumference, and the lower part of the flange has an annular inclined surface extending from top to bottom away from the central axis, and the annular inclined surface is provided with a plurality of ribs for heat sealing with the opening of the packaging container.

[0025] In a preferred embodiment of the present invention, a raised undercut structure is formed on the bottom inner wall of the annular slope.

[0026] In a preferred embodiment of the present utility model, the base is used to be bonded to the container body through an angle structure, flange bonding, snap connection or threaded connection.

[0027] As described above, the characteristics and advantages of the fresh-keeping packaging cover with high sealing function of the utility model are:

[0028] A sealing film is arranged at the bottom opening of the base, and a driving member is arranged on the top inner wall of the top cover. By extending the bottom position of the driving member to the setting position of the sealing film, the bottom of the driving member can be pressed against the top surface of the sealing film, so that a closed chamber is formed between the top inner wall of the top cover, the inner wall of the driving member and the top surface of the sealing film, and materials can be filled in the chamber. During the opening process, it is only necessary to screw the top cover to move it upward, and the driving member pushes the membrane opening member to rotate downward and cut the sealing film. The material in the chamber can pass through the bottom opening of the base and the opening on the packaging container in turn and fall into the packaging container. It is only necessary to screw the top cover to complete the delivery of materials. The operation is simple and convenient, which improves the consumer's experience and is suitable for promotion and use.

[0029] To ensure the sealing of the joint between the top cover and the base, a sealing ring is provided on the top inner wall of the top cover and on the inner side of the top cover side wall. When the top cover and the base are in an assembled state, the top of the base is pressed tightly between the sealing ring and the side wall of the top cover, and a first interference sealing structure is provided between the top inner wall surface of the base and the sealing ring, and a second interference sealing structure is provided between the top outer wall surface of the base and the side wall of the top cover, thereby realizing multi-stage interference sealing, thereby avoiding deformation of the top of the base caused by the single-sided sealing structure and affecting the sealing effect, effectively increasing the sealing contact area between the top cover and the top of the base, and improving the sealing effect of the fresh-keeping packaging cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The following drawings are only intended to illustrate and explain the present invention, and do not limit the scope of the present invention.

[0031] Figure 1 : It is one of the three-dimensional diagrams of the fresh-keeping packaging cover with high sealing function of the utility model.

[0032] Figure 2 : It is a front cross-sectional view of the fresh-keeping packaging cover with high sealing function of the utility model.

[0033] Figure 3 : It is a partial enlarged view of the high sealing structure between the top cover and the base in the fresh-keeping packaging cover with high sealing function of the utility model.

[0034] Figure 4 : It is a schematic diagram of the internal structure of the top cover in the fresh-keeping packaging cover with high sealing function of the utility model.

[0035] Figure 5 : It is a three-dimensional diagram of the base in the fresh-keeping packaging cover with high sealing function of the utility model.

[0036] Figure 6 : It is a front cross-sectional view of the base in the fresh-keeping packaging cover with high sealing function of the utility model.

[0037] Figure 7 : It is one of the three-dimensional views of the membrane opening member in the fresh-keeping packaging cover with high sealing function of the utility model.

[0038] Figure 8 : This is the second stereoscopic view of the membrane opening piece in the fresh-keeping packaging cover with high sealing function of the utility model.

[0039] Fig. 9 : It is a schematic diagram of the cutting position on the sealing film in the fresh-keeping packaging cover with high sealing function of the utility model.

[0040] Fig.10 : It is the second stereoscopic diagram of the fresh-keeping packaging cover with high sealing function of the utility model.

[0041] Fig.11 : It is the third stereoscopic diagram of the fresh-keeping packaging cover with high sealing function of the utility model.

[0042] The accompanying drawings in the present utility model are as follows:

[0043] 1. Top cover; 101. Internal thread;

[0044] 102. sealing ring; 1021. first sealing rib;

[0045] 103. Top cover side wall; 1031. Second sealing rib;

[0046] 104. The third sealing rib; 2. The base;

[0047] 201, external thread; 202, second guide thread;

[0048] 2021, limit block; 203, flange;

[0049] 204, annular bevel; 205, convex rib;

[0050] 206. Inverted structure; 3. Diaphragm opening member;

[0051] 301, cutting teeth; 302, driving track;

[0052] 303, push plate; 304, first guide thread;

[0053] 3041, notch; 4, driving member;

[0054] 401, driving column; 5, sealing film;

[0055] 501, thin-walled area; 5011, cutting section;

[0056] 5012, retention section; 6, chamber. DETAILED DESCRIPTION

[0057] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings.

[0058] Implementation Method 1

[0059] like Figures 1 to 11 As shown, the utility model provides a fresh-keeping packaging cover with a high sealing function, which is used to be fixedly arranged at the opening of a container body. The fresh-keeping packaging cover with a high sealing function comprises a top cover 1, a base 2 and a diaphragm opening piece 3. The top cover 1 is a vertically arranged cylindrical structure with a top seal and a bottom opening, and the base 2 is a vertically arranged cylindrical structure with a top opening and a bottom opening. The top cover 1 is screwed on the top opening of the base 2 (that is, the top cover 1 and the base 2 can be connected by a threaded connection), and a sealing ring 102 is provided on the top inner wall of the top cover 1 and on the inner side of the top cover side wall 103. When the top cover 1 and the base 2 are in an assembled state, the top of the base 2 is pressed between the sealing ring 102 and the top cover side wall 103, and a first interference sealing structure is provided between the top inner wall surface of the base 2 and the sealing ring 102, and a second interference sealing structure is provided between the top outer wall surface of the base 2 and the top cover side wall 103, which can realize multi-stage interference sealing, thereby avoiding deformation of the top of the base caused by the single-sided sealing structure and affecting the sealing effect, effectively increasing the sealing contact area between the top cover 1 and the top of the base 2, and improving the sealing effect of the fresh-keeping packaging cover.

[0060] In the utility model, a cylindrical driving member 4 with a top seal and a bottom opening is vertically arranged on the top inner wall of the top cover 1, and a sealing film 5 is arranged at the bottom opening of the base 2. When the top cover 1 and the base 2 are assembled, the bottom of the driving member 4 is tightly against the top surface of the sealing film 5, so that a chamber 6 for accommodating materials is formed between the top inner wall of the top cover 1, the inner wall of the driving member 4 and the top surface of the sealing film 5. The film opening member 3 can move up and down and can rotate circumferentially between the outer wall of the driving member 4 and the inner wall of the base 2. When the top cover 1 is in a screwed upward state, the driving member 4 pushes the film opening member 3 to rotate downward and cuts the sealing film 5 along the sealing film 5 near the edge. During the opening process, it is only necessary to screw the top cover 1 to move it upward, and the driving member 4 is used to push the membrane opening member 3 to rotate downward and cut the sealing membrane 5. The material in the chamber 6 can pass through the bottom opening of the base 2 and the opening on the packaging container in turn and fall into the packaging container. It is only necessary to screw the top cover 1 to complete the delivery of the material. The operation is simple and convenient, which improves the consumer's experience and is suitable for promotion and use.

[0061] Furthermore, the sealing film 5 can be made of, but not limited to, aluminum foil. Of course, the sealing film 5 can also be made of other easily punctured materials, which are not limited here.

[0062] Furthermore, the material may be, but is not limited to, solid powder, solid particles, concentrated liquid and other fillers.

[0063] In an optional embodiment of the present invention, Figure 3 As shown, the first interference seal structure includes an annular first sealing rib 1021 arranged on the outer side wall of the sealing ring 102 along the circumference of the sealing ring 102 , and the first sealing rib 1021 presses the top inner side wall of the base 2 .

[0064] Further, such as Figure 3 As shown, the second interference seal structure includes an annular second sealing rib 1031 arranged on the top cover side wall 103 along the circumference of the top cover side wall 103, the second sealing rib 1031 presses the top outer wall of the base 2, and the first sealing rib 1021 cooperates with the second sealing rib 1031 to ensure a stable and sufficient seal between the top cover 1 and the base 2 in the assembled state. The setting of the first sealing rib 1021 will cause the top opening of the base 2 to expand outward, and the top opening of the base 2 is greatly deformed. Therefore, the second sealing rib 1031 is arranged on the basis of the first sealing rib 1021. The second sealing rib 1031 presses the top opening of the base 2 inward, so that the deformation of the opening position is effectively controlled, and the first sealing rib 1021 cooperates with the second sealing rib 1031 to fully increase the sealing contact area at the joint position of the top cover 1 and the base 2, effectively improving the sealing effect of the packaging cover.

[0065] Further, such as Figure 3 As shown, on the basis of setting the first sealing rib 1021 and the second sealing rib 1031, a third interference sealing structure can be set between the top end face of the base 2 and the top inner wall of the top cover 1. Among them, the third interference sealing structure includes an annular third sealing rib 104 set on the top inner wall of the top cover 1 along the circumference of the top cover 1, and the third sealing rib 104 presses the top end face of the base 2. In the present utility model, since the assembly method of the top cover 1 and the base 2 is a press cover assembly, if the top cover 1 and the base 2 are connected by threads, the top cover 1 will slowly rebound due to the stress after the top cover 1 and the base 2 are assembled, which will cause a gap between the top end face of the base 2 and the top inner wall of the top cover 1. Therefore, by setting the third sealing rib 104, it can not only play a stop role when the top cover 1 and the base 2 are assembled, but also fill the gap caused by the rebound of the top cover 1, further increase the contact area of ​​the joint position of the top cover 1 and the base 2, and further improve the overall sealing effect of the packaging cover.

[0066] In an optional embodiment of the present invention, Figure 2 , Figure 4 , Figure 7 , Figure 8 As shown, the diaphragm opening member 3 is a cylindrical structure arranged vertically and opened at both ends, and a cutting tooth 301 is arranged at the bottom of the diaphragm opening member 3. The diaphragm opening member 3 can move up and down and can be rotatably sleeved on the outer side of the driving member 4; a driving structure for driving the diaphragm opening member 3 to rotate and move downward is arranged between the driving member 4 and the diaphragm opening member 3, wherein the driving structure includes at least one driving column 401 arranged on the outer wall of the driving member 4 and a driving track 302 arranged on the inner wall of the diaphragm opening member 3. When the top cover 1 is in the rotation When the screw is in the upward state, the upper edge of the driving track 302 abuts against the driving column 401, and the driving member 4 and the driving column 401 are driven to rotate synchronously by rotating the top cover 1, so that the driving column 401 can slide from bottom to top along the driving track 302. In this process, the driving column 401 also applies an oblique thrust to the driving track 302, so that the diaphragm opening member 3 rotates circumferentially while moving downward, so as to push the diaphragm opening member 3 to rotate downward and cut the sealing film 5 along the position close to the edge of the sealing film 5. Among them, the specific structure of the driving track 302 (such as the driving track 302 may include a first driving section, a second driving section and a terminal limit section) can refer to the structure of the driving track in the Chinese utility model patent (Announcement No.: CN 217375577U).

[0067] Furthermore, the driving member 4 and the top cover 1 may be, but are not limited to, an integrally formed structure.

[0068] Furthermore, the number of driving rails 302 and the number of driving posts 401 are both multiple and the same. Each driving rail 302 is evenly distributed along the circumference of the diaphragm opening member 3, and each driving post 401 is evenly distributed along the circumference of the driving member 4. When the top cover 1, the base 2 and the diaphragm opening member 3 are assembled, each driving post 401 abuts against the same position on the corresponding driving rail 302. In the process of opening the sealing diaphragm 5, each driving post 401 and the corresponding driving rail 302 play a driving role, thereby increasing the driving force of the diaphragm opening member 3 and ensuring the force balance of the diaphragm opening member 3, so that the diaphragm opening member 3 can rotate and move downward smoothly, ensuring the smooth opening of the sealing diaphragm 5.

[0069] In an optional embodiment of the present invention, Figure 7 , Figure 8 As shown, there are two cutting teeth 301, and the two cutting teeth 301 are arranged non-radially symmetrically on the film opening member 3 (i.e., the angle between the two cutting teeth 301 and the axis line is not 180 degrees), so that when the sealing film 5 is cut by the cutting teeth 301, a part of the sealing film 5 can be left uncut, so that when the sealing film 5 is opened, the sealing film 5 can still be connected to the base 2 and will not fall into the packaging container. Compared with only one cutting tooth 301, two cutting teeth 301 have a larger cutting range when the film opening member 3 rotates the same angle, so that the sealing film 5 can be opened without significantly rotating the top cover 1.

[0070] Further, such as Figure 2 , Figure 6 , Fig. 9 As shown, a circular thin-walled area 501 is provided on the sealing film 5 and near its annular outer edge. The thickness of the thin-walled area 501 is less than the thickness of the main body of the sealing film 5. In the vertical direction, the cutting teeth 301 are opposite to the thin-walled area 501, so that the cutting teeth 301 can smoothly pierce the thin-walled area 501 and cut and open the sealing film 5 along the thin-walled area 501. The thin-walled area 501 includes a connected cutting section 5011 and a retaining section 5012. The cutting teeth 301 cut the sealing film 5 along the cutting section 5011, and the retaining section 5012 remains in a cutting state.

[0071] Further, such as Figure 7 , Figure 8 As shown, a push plate 303 is provided at the bottom of the film opening member 3 and on at least one side of the cutting tooth 301. In the axial direction, the length of the push plate 303 is smaller than the length of the cutting tooth 301, so that after the cutting tooth 301 cuts the sealing film 5, the sealing film 5 can be pushed downward to open by the push plate 303, thereby ensuring that the material in the chamber 6 can fall smoothly into the packaging container.

[0072] In an optional embodiment of the present invention, Figure 2 , Figures 4 to 6 As shown, an internal thread 101 is provided on the inner wall of the top cover 1, and an external thread 201 that can be threadedly connected with the internal thread 101 is provided on the outer wall of the base 2, and the top cover 1 is threadedly connected with the base 2.

[0073] Further, such as Figure 2 , Figures 5 to 8 As shown, the outer wall of the diaphragm opening member 3 is provided with a first guide thread 304, and the inner wall of the base 2 is provided with a second guide thread 202 that can be screwed with the first guide thread 304, and the diaphragm opening member 3 and the base 2 are screwed together through the first guide thread 304 and the second guide thread 202. When the top cover 1 is in the screwed upward state, the downward position of the diaphragm opening member 3 can be guided and limited by the cooperation of the first guide thread 304 and the second guide thread 202, so as to ensure the smooth rotation and downward movement of the diaphragm opening member 3.

[0074] Furthermore, the number of groups of the first guide thread 304 and the second guide thread 202 is greater than or equal to the number of groups of the internal thread 101 and the external thread 201. That is, one group of threads on the internal thread 101 and the external thread 201 corresponds to multiple groups of threads on the first guide thread 304 and the second guide thread 202, so that when the top cover 1 moves one group of threads, the diaphragm opening member 3 moves multiple groups of threads correspondingly, thereby ensuring that the top cover 1 only needs to be screwed a small number of times to achieve a large downward movement of the diaphragm opening member 3, ensuring that the diaphragm opening member 3 can smoothly move downward to puncture the sealing diaphragm 5.

[0075] In an optional embodiment of the present invention, Figures 6 to 8 As shown, a notch 3041 is provided on the first guide thread 304, and a stopper 2021 capable of limiting the notch 3041 is provided on the second guide thread 202, and the stopper 2021 can be embedded in the notch 3041 to limit the initial position of the diaphragm opening member 3. Since the diaphragm opening member 3 is screwed to the base 2, the first guide thread 304 of the diaphragm opening member 3 is screwed to the second guide thread 202 on the base 2 after assembly. If there is no stopper structure, the diaphragm opening member 3 can rotate and move along the thread structure, which will cause the diaphragm opening member 3 to be out of position, and there is a risk of puncturing the sealing diaphragm 5 and driving failure when the top cover 1 is not unscrewed. The stopper structure that matches the notch 3041 with the stopper 2021 can position the diaphragm opening member 3 at the initial position, and the stopper 2021 will be destroyed when the top cover 1 is unscrewed for the first time.

[0076] In an optional embodiment of the present invention, Figure 1 , Figure 2 , Figure 5 , Figure 6 , Fig. 9 The edge of the bottom opening of the base 2 is formed with an annular flange 203 along its circumference. The lower part of the flange 203 has an annular slope 204 extending from top to bottom in a direction away from the central axis. The annular slope 204 is provided with a plurality of convex ribs 205 for heat sealing with the opening of the packaging container. When the base 2 is connected to the packaging container, the annular slope 204 is matched with the opening of the packaging container. When the packaging container adopts a paper-based packaging material, the convex ribs 205 will be heated and melted to be bonded and fixed with the paper-based packaging material to ensure the bonding strength.

[0077] Further, such as Figure 2 , Figure 6 As shown, the inner wall of the bottom of the annular slope 204 is formed with an annular raised undercut structure 206 along its circumference. When the base 2 is connected to the packaging container, the undercut structure 206 can limit the assembly of the base 2 and the packaging container.

[0078] In the present invention, the base 2 is used to be bonded with the container body through an angle structure, a flange, a snap connection or a threaded connection. Of course, other connection structures can also be used between the base 2 and the container body, which are not limited here.

[0079] Among them, Fig.10 As shown, the base 2 and the container body are bonded by a folded corner structure, which folds the packaging material near the opening position of the container body to form a shape that matches the base 2 near the opening position of the container body, and then the base 2 and the container body are bonded, such as the connection structure in the Chinese patent (grant announcement number: CN 102673859B).

[0080] Among them, the base 2 is bonded to the container body through a flange, which forms a certain angle on the container body near the opening position, and the bottom of the base 2 has a connecting structure or a flange structure adapted to the angle, and the connecting structure or the flange structure of the base 2 is bonded to the container body near the opening position, such as the connecting structure in the Chinese patent (authorization announcement number: CN107735332 B).

[0081] The base 2 is connected to the container body by a snap-fit ​​connection, and matching bosses and grooves are respectively provided on the container body near the opening position and on the base 2. The connection between the base 2 and the container body is achieved by the matching snap-fit ​​connection between the boss and the groove.

[0082] Among them, Fig.11 As shown, the base 2 is connected to the container body via a threaded connection, and matching threaded structures are provided on the container body near the opening and on the base 2 to achieve threaded connection between the base 2 and the container body (such as a bottle).

[0083] The characteristics and advantages of the fresh-keeping packaging cover with high sealing function of the utility model are:

[0084] 1. A chamber 6 for storing materials separately is formed in the fresh-keeping packaging cover with a high sealing function. The top cover 1 only needs to be screwed to move it upward. The driving member 4 inside the top cover 1 cooperates with the driving track 302 formed on the diaphragm opening member 3 to drive the diaphragm opening member 3 to rotate in the circumferential direction and move downward at the same time, thereby cutting the sealing film 5 at the bottom of the base 2. The material in the chamber 6 can pass through the bottom opening of the base 2 and the opening on the packaging container in turn and fall into the packaging container. The material can be put in by screwing the top cover 1. The operation is simple and convenient, which improves the consumer's experience.

[0085] 2. In the fresh-keeping packaging cover with high sealing function, a sealing ring 102 is arranged on the top inner wall of the top cover 1 and on the inner side of the top cover side wall 103, and a first interference sealing structure is provided between the top inner wall surface of the base 2 and the sealing ring 102, and a second interference sealing structure is provided between the top outer wall surface of the base 2 and the top cover side wall 103, which can realize multi-stage interference sealing, thereby avoiding deformation of the top of the base caused by the single-sided sealing structure and affecting the sealing effect, effectively increasing the sealing contact area between the top of the top cover 1 and the top of the base 2, and improving the sealing effect of the fresh-keeping packaging cover.

[0086] 3. The fresh-keeping packaging cover with high sealing function can store solid, semi-solid or liquid substances, and can pierce the sealing film when assembled with other packaging. The external addition technology perfectly solves the problem of adding high-temperature easily lost or easily inactivated raw materials in aseptic packaging in the liquid milk product processing technology, improves product value, diversifies packaging application technology solutions, and maximizes the value of functional additives.

[0087] Implementation Method 2

[0088] The utility model provides a packaging container, which comprises a container body and the above-mentioned fresh-keeping packaging cover with high sealing function, the top of the container body is provided with an opening communicated with its inner cavity, and the fresh-keeping packaging cover with high sealing function is arranged at the opening of the container body.

[0089] The fresh-keeping packaging cover with high sealing function can be fixed to the opening of the packaging container by hot melting. Of course, the fresh-keeping packaging cover with high sealing function can also be connected to the packaging container by bonding, snapping, threading or other fixing methods, and the specific connection method and structure are not limited here.

[0090] The container body in the utility model can be, but is not limited to, a bottle (such as an HDPE bottle, a PET bottle), a cup (such as a plastic cup), a box (such as a paper-based packaging box), or other containers that can hold beverages.

[0091] The packaging container of the utility model has the same characteristics and advantages as the above-mentioned fresh-keeping packaging cover with high sealing function, which will not be described in detail here.

[0092] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes and modifications made by any person skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A fresh-keeping packaging cover with a high sealing function, which is used to be arranged at the opening of a container body, characterized in that: The fresh-keeping packaging cover with high sealing function comprises a top cover, a base and a membrane opening member, the top cover is screwed on the base, a sealing ring is arranged on the top inner wall of the top cover and on the inner side of the top cover side wall, when the top cover and the base are assembled, the top of the base is pressed tightly between the sealing ring and the top cover side wall, and a first interference sealing structure is provided between the top inner side wall surface of the base and the sealing ring, and a second interference sealing structure is provided between the top outer side wall surface of the base and the top cover side wall; A cylindrical driving member with a top seal and a bottom opening is vertically arranged on the top inner wall of the top cover, and a sealing film is arranged at the bottom opening of the base. A chamber for accommodating materials is formed between the top inner wall of the top cover, the inner wall of the driving member and the top surface of the sealing film. The film opening member can move up and down and can rotate circumferentially between the outer wall of the driving member and the inner wall of the base. When the top cover is in a screwed upward state, the driving member pushes the film opening member to rotate downward and cut the sealing film.

2. The fresh-keeping packaging cover with high sealing function as claimed in claim 1, characterized in that: The first interference seal structure comprises an annular first sealing rib arranged on the outer side wall of the sealing ring along the circumference of the sealing ring, and the first sealing rib presses the top inner side wall surface of the base.

3. The fresh-keeping packaging cover with high sealing function as claimed in claim 1 or 2, characterized in that: The second interference sealing structure comprises an annular second sealing rib arranged on the side wall of the top cover along the circumference of the side wall of the top cover, and the second sealing rib presses the top outer side wall surface of the base.

4. The fresh-keeping packaging cover with high sealing function as claimed in claim 1, characterized in that: A third interference sealing structure is provided between the top end surface of the base and the top inner wall of the top cover.

5. The fresh-keeping packaging cover with high sealing function as claimed in claim 4, characterized in that: The third interference sealing structure comprises an annular third sealing rib arranged on the top inner wall of the top cover along the circumference of the top cover, and the third sealing rib presses the top end surface of the base.

6. The fresh-keeping packaging cover with high sealing function as claimed in claim 1, characterized in that: The diaphragm opening member is a vertically arranged cylindrical structure with openings at both ends, and a cutting tooth is arranged at the bottom of the diaphragm opening member. The diaphragm opening member can move up and down and can rotate circumferentially so as to be sleeved on the outer side of the driving member; A driving structure for driving the diaphragm opening member to rotate and move downward is arranged between the driving member and the diaphragm opening member, and the driving structure includes at least one driving column arranged on the outer wall of the driving member and a driving track arranged on the inner wall of the diaphragm opening member. The top cover is in a screwed upward state, and the driving track abuts against the driving column and pushes the driving column to slide from bottom to top along the driving track to push the diaphragm opening member to rotate and move downward.

7. The fresh-keeping packaging cover with high sealing function as claimed in claim 6, characterized in that: The number of the cutting teeth is two, and the two cutting teeth are arranged non-radially symmetrically on the diaphragm opening member.

8. The fresh-keeping packaging cover with high sealing function as claimed in claim 6 or 7, characterized in that: A push plate is provided at the bottom of the film opening member and at least on one side of the cutting teeth to push the sealing film to open downward after the cutting teeth cut the sealing film.

9. The fresh-keeping packaging cover with high sealing function as claimed in claim 7, characterized in that: An annular thin-walled area is provided on the sealing film near its annular outer edge, the thickness of the thin-walled area is less than the thickness of the sealing film body, and in the vertical direction, the cutting teeth are opposite to the thin-walled area; The thin-walled area includes a connected cutting section and a retaining section, and the cutting teeth cut the sealing film along the cutting section.

10. The fresh-keeping packaging cover with high sealing function as claimed in claim 1, characterized in that: An inner wall of the top cover and an outer wall of the base are provided with an inner thread and an outer thread that are threadedly matched.

11. The fresh-keeping packaging cover with high sealing function as claimed in claim 10, characterized in that: The outer wall of the diaphragm opening member is provided with a first guide thread, the inner wall of the base is provided with a second guide thread, and the diaphragm opening member and the base are screwed together through the first guide thread and the second guide thread; The number of groups of the first guide thread and the second guide thread is greater than or equal to the number of groups of the internal thread and the external thread.

12. The fresh-keeping packaging cover with high sealing function as claimed in claim 11, characterized in that: The first guide thread and the second guide thread are provided with matching limiting notches and limiting blocks, and the limiting blocks can be embedded in the notches to limit the initial position of the diaphragm opening member.

13. The fresh-keeping packaging cover with high sealing function as claimed in claim 1, characterized in that: The bottom of the base is formed with an annular flange along its circumference, and the lower part of the flange has an annular inclined surface extending from top to bottom away from the central axis, and the annular inclined surface is provided with a plurality of convex ribs for heat sealing with the opening of the container body.

14. The fresh-keeping packaging cover with high sealing function as claimed in claim 13, characterized in that: A raised undercut structure is formed on the inner wall of the bottom of the annular slope.

15. The fresh-keeping packaging cover with high sealing function as claimed in claim 1, characterized in that: The base is used to be bonded to the container body through an angle structure, a flange, a snap connection or a threaded connection.

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