One-touch cover opening food preservation box

Abstract

The utility model relates to the field of preservation box, disclose a kind of one-key uncovering food preservation box, including box body, top cover and handle, top cover and box body detachably connect, the both ends of handle are rotatably connected in the both sides of top cover, handle is equipped with the holding mouth that the hand of human body is suitable to pass, the both ends of handle are equipped with push part, push part is suitable to rotate and butt with the upper end wall of box body, box body is equipped with the article cavity for placing article, top cover is equipped with the air hole being connected with article cavity, handle is equipped with sealing part, air hole is located on the rotation path of sealing part, sealing part is suitable to be inserted with air hole, to seal air hole and form sealed state. When rotating handle makes sealing part away from air hole, article cavity is connected with external air through air hole, to balance air pressure, and handle is pressed against box body by push part, lever principle is used to drive top cover to be raised, it is convenient to open cover, more relaxed and labor-saving, one-key opening or closing, efficiency is improved, single hand can also be easily operated, reduce the use threshold, labor-saving opening and closing.

Description

Technical Field

[0001] This utility model relates to the field of food storage container technology, and more specifically, to a one-button openable food storage container. Background Technology

[0002] Currently, food storage containers are generally designed to be airtight, preventing outside air from entering and causing food to spoil faster. Existing food storage containers typically use a snap-on mechanism to open, which applies pressure to the seal on the lid, ensuring near-zero gap between the seal and the inner side of the container. However, this method of closing the lid creates pressure, forcing gas out and causing the internal pressure to drop below the external pressure. Alternatively, when hot food is placed inside, the cooling process can cause the internal pressure to decrease, making the lid difficult to open and requiring considerable effort. It usually requires both hands to press the container and lid separately, making opening inconvenient. Even the few containers that can be opened with one hand have inconvenient opening mechanisms, and the opening action is limited by the length of the human hand. Utility Model Content

[0003] To address at least one of the aforementioned problems, this utility model first provides a one-button openable food storage box, comprising a box body, a top cover, and a handle. The top cover and the box body are detachably connected. The two ends of the handle are rotatably connected to the two sides of the top cover. The handle has a grip opening suitable for a human hand to pass through. Both ends of the handle have a pushing part, which is adapted to rotate and abut against the upper wall of the box body. The box body has a storage cavity for placing items. The top cover has an air hole communicating with the storage cavity. The handle has a sealing part, and the air hole is located on the rotation path of the sealing part. The sealing part is adapted to be inserted into the air hole to seal the air hole and form a sealed state.

[0004] When the handle is rotated to move the sealing part away from the air hole, the storage cavity is connected to the outside air through the air hole, thereby balancing the air pressure. The handle pushes against the box body through the pushing part to cause the top cover to tilt up. After the human hand passes through the grip opening, the top cover is lifted by the handle.

[0005] Optionally, the handle is arched, with a pivot at both ends, and a connecting hole on both sides of the top cover. The pivot is inserted into the connecting hole and rotatably connected to the connecting hole.

[0006] Optionally, the handle includes an open position and a closed position. When the handle is in the open position, the minimum distance from the axis of the rotating shaft to the box body is greater than the minimum distance from the axis of the rotating shaft to the box body when the handle is in the closed position.

[0007] Optionally, when in a sealed state, the distance from the axis of the rotating shaft to the lower side of the handle is less than the distance from the axis of the rotating shaft to the upper side of the handle.

[0008] Optionally, the sealing part includes a connecting shaft and a sealing plug. The connecting shaft is fixed to the handle, and the sealing plug is sleeved on the connecting shaft. A limiting block is provided on the connecting shaft. The bottom of the limiting block is provided with an inclined first guide surface. The inner wall of the sealing plug is provided with a limiting part. The limiting part is provided with a second guide surface. The first guide surface and the second guide surface are slidably connected to guide the limiting block and the limiting part to engage.

[0009] Optionally, the edge of the top cover is provided with a mounting cavity suitable for accommodating the handle, and the handle and the mounting cavity are rotatably connected; when the sealing part blocks the air hole, the handle is accommodated in the mounting cavity.

[0010] Optionally, the handle is provided with a limiting step, the limiting step including a first step and a second step, the first step being adapted to abut against the edge of the box body, the sealing part being provided on the second step, the mounting cavity being provided with a third step, the air hole being provided on the third step, the height difference between the first step and the second step being adapted to engage the third step; when the sealing part blocks the air hole, the lower end face of the second step abuts against the upper end face of the third step.

[0011] Optionally, the wall of the vent is provided with an inwardly protruding clamping part, which is used to clamp the sealing part.

[0012] Optionally, the handle is provided with an inclined contact surface, which facilitates the fingers to pry the handle and rotate it.

[0013] Optionally, it also includes a sealing ring, and the peripheral wall of the top cover is provided with a clamping groove for installing the sealing ring. The edge of the sealing ring protrudes from the clamping groove and is slidably connected to the inner wall of the box. When the top cover moves the sealing ring down, the edge of the sealing ring unfolds and abuts against the inner wall of the box to maintain a sealing state. A cavity is provided above the groove wall of the clamping groove. The cavity provides space for the edge deformation of the sealing ring and / or for the rotation of the pushing part.

[0014] Compared to the inconvenience of opening the lid with both hands in existing technologies, this application solves the sealing and pressure relief problems by setting a sealing part and a pushing part on the handle. At the same time, the sealing part solves the sealing and pressure relief problems, and the pushing part uses the lever principle to pry the top cover up, making the opening operation easier and less strenuous. One-button opening or closing improves efficiency and can be easily operated with one hand, lowering the threshold of use. For special groups of people who have difficulty operating with both hands (such as the elderly with insufficient hand strength or people with disabilities whose one-handed operation is limited), the wide handle lever design increases the force-bearing area and makes opening and closing less strenuous.

[0015] When the food storage container is placed on a countertop, with the thumb gripping the middle of the handle and the four fingers pressing down on the top lid, rotating the thumb causes the handle to turn towards the palm, ultimately lifting the handle. This process not only opens the vent but also the top lid. During this process, the handle naturally enters the palm of the hand. At this point, the four fingers can be closed to grasp the handle, allowing for lifting. Simultaneously, the top lid detaches from the container due to its own weight, achieving one-handed opening. The entire process is very smooth, unlike other existing food storage containers which experience jamming even when opened with one hand. Furthermore, the two sides of the handle and the top lid form two lever points, requiring less effort compared to the single lever point in existing technologies.

[0016] In the existing technology, for other food storage containers with a single-handed outward rotation opening mechanism, the distance the lever moves from one end of the hand to the other is limited by the length of the hand. However, this application adopts a handle-type design, where the lever's rotation radius is from the pad of the thumb to the tip of the middle finger when opening the lid with one hand. After holding the handle, the rotation distance is no longer limited by the length of the palm. As can be seen from the principle of work, under the same force, the longer the distance an object moves, the greater the work it does. Attached Figure Description

[0017] Figure 1 This is a structural diagram of the one-button opening food preservation box according to an embodiment of the present invention;

[0018] Figure 2 This is a cross-sectional view of the one-button opening food storage box according to an embodiment of the present utility model;

[0019] Figure 3 for Figure 2 Enlarged view of section A;

[0020] Figure 4 This is an exploded view of the one-button opening food preservation box according to an embodiment of the present invention;

[0021] Figure 5 This is a structural diagram of the handle according to an embodiment of the present utility model;

[0022] Figure 6 This is a structural diagram of the top cover of an embodiment of the present utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Box body; 11. Storage cavity; 2. Top cover; 21. Air vent; 211. Clamping part; 22. Third step; 23. Connecting hole; 24. Clamping groove; 25. Cavity; 3. Handle; 31. Pushing part; 32. Connecting shaft; 321. Limiting block; 322. First guide surface; 33. Sealing plug; 331. Limiting part; 332. Second guide surface; 34. Rotating shaft; 35. Reference surface; 36. Limiting step; 361. First step; 362. Second step; 37. Contact surface; 38. Grip opening; 4. Sealing ring. Detailed Implementation

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0026] The accompanying drawings of the embodiments of this utility model provide a coordinate system XYZ, where the positive direction of the X-axis represents the left and the negative direction of the X-axis represents the right, the positive direction of the Y-axis represents the front and the negative direction of the Y-axis represents the back, the positive direction of the Z-axis represents the top and the negative direction of the Z-axis represents the bottom.

[0027] This utility model embodiment provides a one-button openable food storage box, combined with... Figures 1 to 6 As shown, the box includes a box body 1, a top cover 2, and a handle 3. The top cover 2 and the box body 1 are detachably connected. The two ends of the handle 3 are rotatably connected to the two sides of the top cover 2. Each end of the handle 3 is provided with a pushing part 31, which is adapted to rotate and abut against the upper wall of the box body 1. The box body 1 is provided with a storage cavity 11 for placing items. The top cover 2 is provided with an air hole 21 communicating with the storage cavity 11. The handle 3 is provided with a sealing part. The air hole 21 is located on the rotation path of the sealing part. The sealing part is adapted to be inserted into the air hole 21 to seal the air hole 21 and form a sealed state.

[0028] When the handle 3 is rotated so that the sealing part is away from the air hole 21, the storage cavity 11 is connected to the outside air through the air hole 21, thereby balancing the air pressure. The handle 3 pushes against the box body 1 through the pushing part 31, so as to drive the top cover 2 to tilt up, making it easy to open the cover.

[0029] like Figure 1 , Figure 3 and Figure 5As shown, in this embodiment, the handle 3 is square-arched and integrally formed. The handle 3 includes a gripping part and a connecting part. Two connecting parts are respectively connected to the two ends of the gripping part. The connecting parts and the top cover are rotatably connected. The gripping part is easy for the hand to hold, and the width of the gripping part is greater than the width of the connecting part. This wide handle design not only makes it easier to hold, but also increases the force-bearing area and makes opening and closing easier. The pushing part 31 is the bottom corner of the end of the handle 3. When the handle 3 rotates upward, the bottom corner abuts against the box body 1 under the action of the lever principle and pries the top cover 2, increasing the gap between the top cover 2 and the box body 1, making it easier to open the cover. Forward rotation is clockwise or counterclockwise rotation, and reverse rotation is rotation in the opposite direction to forward rotation.

[0030] After placing the food in the storage cavity 11 and pressing the top cover 2 onto the box body 1, rotate the handle 3 clockwise so that the sealing part rotates and inserts into the air inlet 21, sealing the air inlet 21 to form a sealed state. This prevents external air from entering the storage cavity 11 through the air inlet 21, which would accelerate the spoilage of the food. At the same time, when the handle 3 is rotated to be almost parallel to the top cover 2, the force applied to the handle 3 by the hand is transmitted to the top cover 2 and the box body 1 through the handle. This downward pressing force can further close the top cover 2 and the box body 1, increasing the sealing effect between the top cover 2 and the box body 1.

[0031] When it is necessary to open the lid, rotate the handle 3 in the opposite direction to release the seal by pulling out the air hole 21, so that the storage cavity 11 can be connected to the outside, balance the air pressure, avoid the interference of pressure difference, and make the top cover 2 easier to open. At the same time, the user can also lift the handle 3 directly in the direction of rotation to open the top cover 2 in one step, which can be easily operated with one hand.

[0032] After the handle 3 is lifted from the top cover 2, a person can directly reach into the grip opening 38, grasp the grip part, and lift the top cover 2 directly. Specific operation: Place the food storage container on a table, hook your thumb onto the grip part, press the top cover 2 with your four fingers, rotate your thumb to rotate the handle 3 towards your palm, and finally lift the handle 3. In this process, not only the vent 21 is opened, but the top cover 2 is also opened. During this process, the handle 3 will naturally enter the palm of your hand. At this time, you can close your four fingers to grasp the handle 3 and lift it. At the same time, with the help of the weight of the container body 1, the top cover 2 detaches from the container body 1, thus lifting the top cover 2, achieving one-handed opening. The whole process is very smooth, while other food storage containers in the existing technology will experience jamming even when opened with one hand. Furthermore, the two connecting parts of the handle 3 and the top cover 2 form two lever fulcrums, which is more effortless than the single lever fulcrum in the existing technology.

[0033] In the existing technology, for other food storage containers with a single-handed outward rotation opening mechanism, the distance the lever's force-bearing end moves from one end of the hand to the other is limited by the length of the hand. However, this application adopts a handle-type design, where the lever's force-bearing end has a rotation radius from the pad of the thumb to the tip of the middle finger when opening the lid with one hand. After gripping, the rotation distance is no longer limited by the length of the palm. As can be seen from the principle of work, under the same force, the longer the distance an object moves, the greater the work it does.

[0034] Compared to the inconvenience of opening the lid with both hands in existing technologies, this application solves the sealing and pressure relief problems by setting a sealing part and a pushing part 31 on the handle 3. At the same time, the sealing part solves the sealing and pressure relief problems, and the top cover 2 is moved upward by the pushing part 31 using the lever principle, making the opening operation easier and less strenuous. One-button opening or closing improves efficiency and can be easily operated with one hand, lowering the threshold of use. For special groups who have difficulty operating with both hands (such as the elderly with insufficient hand strength or disabled people whose one-handed operation is limited), the handle 3 with its wide handle lever design increases the force-bearing area, making opening and closing effortless.

[0035] like Figure 3 and Figure 5 As shown, optionally, the sealing part includes a connecting shaft 32 and a sealing plug 33, the connecting shaft 32 is fixed on the handle 3, and the sealing plug 33 is sleeved on the connecting shaft 32.

[0036] In this embodiment, the axis of the vent 21 is vertically oriented, and the sealing plug 33 is made of silicone and is elastic. The end of the sealing plug 33 near the vent 21 has a chamfer to facilitate the sealing state after the sealing plug 33 is inserted into the vent 21.

[0037] like Figure 3 As shown, optionally, the connecting shaft 32 is provided with a limiting block 321, the bottom of the limiting block 321 is provided with an inclined first guide surface 322, the inner wall of the sealing plug 33 is provided with a limiting part 331, the limiting part 331 is provided with a second guide surface 332, the first guide surface 322 and the second guide surface 332 are slidably connected to guide the limiting block 321 and the limiting part 331 to engage.

[0038] In this embodiment, when installing the sealing plug 33, the connecting shaft 32 is pressed downwards into the sealing plug 33. When the limiting block 321 slides below the limiting part 331, a slight vibration will occur between the limiting block 321 and the limiting part 331, providing a tactile indication that the installation is in place. After installation, the limiting part 331 is positioned above the limiting block 321, making the connection between the sealing plug 33 and the connecting shaft 32 more stable and less prone to falling off.

[0039] like Figure 5 and Figure 6As shown, optionally, the handle 3 is arched, and both ends of the handle 3 are provided with a pivot 34. Both sides of the top cover 2 are provided with a connecting hole 23. The pivot 34 is inserted into the connecting hole 23 and rotatably connected to the connecting hole 23.

[0040] In this embodiment, there is one handle 3, and the axis of the rotating shaft 34 is located in the front-to-back direction. In other embodiments, the axis of the rotating shaft 34 may also be located in the left-to-right direction. Furthermore, the rotating shaft 34 can be installed near the center of the top cover 2, so that after rotating the handle 3, it is convenient to open the cover by using the handle 3. In other embodiments, there may be two handles 3, which are rotatably installed on the left and right sides of the top cover 2 respectively. The user can use one hand to rotate both handles 3 respectively and then lift both handles 3 at the same time, thereby causing the top cover 2 to detach from the box body 1.

[0041] like Figure 5 As shown, optionally, the handle 3 includes an open position and a closed position. When the handle 3 is in the open position, the minimum distance from the axis of the rotating shaft 34 to the box body 1 is greater than the minimum distance from the axis of the rotating shaft 34 to the box body 1 when the handle 3 is in the closed position. With this configuration, when the handle 3 rotates around its axis, the pushing part 31 can rotate to abut against the box body 1 and pry open the top cover 2 under the action of leverage.

[0042] like Figure 5 As shown, optionally, when in a sealed state, the distance from the axis of the rotating shaft 34 to the lower side of the handle 3 is less than the distance from the axis of the rotating shaft 34 to the upper side of the handle 3. This arrangement brings the rotating shaft 34 closer to the box body 1, resulting in a greater height difference between the axis of the rotating shaft 34 and the upper wall of the box body 1 when the lid is closed and open.

[0043] Optionally, the edge of the top cover 2 is provided with a mounting cavity suitable for accommodating the handle 3, and the handle 3 and the mounting cavity are rotatably connected; when the sealing part blocks the air hole 21, the handle 3 is accommodated in the mounting cavity.

[0044] like Figure 1 As shown, in this embodiment, the top cover 2 is approximately a cuboid with rounded corners to prevent sharp corners from scratching the user. The handle 3 is located at any corner of the top cover 2. The mounting cavity is recessed at one corner of the top cover 2, and the handle 3 serves as one side of the top cover 2. The upper surface of the handle 3 is flush with or nearly flush with the upper surface of the top cover 2. This design is not only aesthetically pleasing but also reduces the space occupied by the handle 3, allowing the handle 3 and the top cover 2 to be cleverly integrated.

[0045] Optionally, the handle 3 is provided with a limiting step 36, which includes a first step 361 and a second step 362. The first step 361 is adapted to abut against the edge of the box body 1. The sealing part is provided on the second step 362. The mounting cavity is provided with a third step 22. The air hole 21 is provided on the third step 22. The height difference between the first step 361 and the second step 362 is adapted to engage the third step 22. When the sealing part blocks the air hole 21, the lower end face of the second step 362 abuts against the upper end face of the third step 22.

[0046] like Figure 5 and Figure 6 As shown, in this embodiment, the limiting step 36 does not affect the upward rotation of the handle 3, but is used to limit the degree of downward rotation of the handle 3. When the handle 3 is rotated downward to block the air hole 21, the limiting step 36 and the third step 22 cooperate to transmit the pressing pressure applied by the user to the top cover 2, thereby indirectly pressing the top cover 2 and the box body 1, resulting in a better sealing effect between the top cover 2 and the box body 1.

[0047] like Figure 3 As shown, optionally, the wall of the air hole 21 is provided with an inwardly protruding clamping part 211, which is used to clamp the sealing part to improve the sealing effect. The upper end face of the clamping part 211 is inclined to guide the sealing part downward into the air hole 21.

[0048] like Figure 3 and Figure 5 As shown, optionally, the handle 3 is provided with an inclined contact surface 37, which facilitates the fingers to grip the handle 3 and rotate it. The inclined contact surface 37 contacts the fingertip, thereby facilitating the application of force.

[0049] like Figure 3 and Figure 4 As shown, optionally, the one-button opening food storage box also includes a sealing ring 4. A clamping groove 24 for installing the sealing ring 4 is provided around the peripheral wall of the top cover 2. The edge of the sealing ring 4 protrudes from the clamping groove 24 and slides in connection with the inner wall of the box body 1. When the top cover 2 moves the sealing ring 4 downwards, the edge of the sealing ring 4 unfolds and abuts against the inner wall of the box body 1 to maintain a sealed state. A cavity 25 is provided above the groove wall of the clamping groove 24. The cavity 25 provides space for the edge deformation of the sealing ring 4 and / or for the rotation of the pushing part 31. When the distance between the ends of the handle 3 is sufficiently wide (i.e., exceeding the outer edge of the clamping groove 24), this rotation space is not needed; however, when the distance between the ends of the handle is insufficient (i.e., the distance does not exceed the outer edge of the clamping groove) and the height is insufficient, this rotation space is required.

[0050] In this embodiment, the shapes of the box body 1, the top cover 2, and the sealing ring 4 are mutually compatible. The sealing ring 4 is made of silicone, preferably food-grade silicone. The clamping groove 24 clamps the sealing ring 4 from the top and bottom. The outer opening of the clamping groove 24 allows the edge of the sealing ring 4 to extend out of the clamping groove 24. When the top cover 2 is pressed down, the edge of the sealing ring 4 tilts upward and rubs against the inner wall of the box body 1. At this time, the edge of the sealing ring 4 is located in the cavity 25. The cavity 25 provides a distance for the sealing ring 4 to move downward in the vertical direction. During the downward movement, the sealing ring 4 compresses the air inside the box body 1, causing some air to be discharged from the gap between the sealing ring 4 and the box body 1 until a seal is formed. When the top cover 2 moves the sealing ring 4 upward to open the cover, the edge of the sealing ring 4 flips downward. The cavity 25 provides a distance for the deformation and upward movement of the sealing ring 4, facilitating the opening of the cover and also providing space for the rotation of the pushing part 31.

Claims

1. A one-touch openable food storage container, characterized in that, The container includes a box body (1), a top cover (2), and a handle (3). The top cover (2) and the box body (1) are detachably connected. The two ends of the handle (3) are rotatably connected to the two sides of the top cover (2). The handle (3) has a grip opening (38) suitable for human hands to pass through. Both ends of the handle (3) have a pushing part (31). The pushing part (31) is suitable for rotating and abutting against the upper wall of the box body (1). The box body (1) has a storage cavity (11) for placing items. The top cover (2) has an air hole (21) communicating with the storage cavity (11). The handle (3) has a sealing part. The air hole (21) is located on the rotation path of the sealing part. The sealing part is suitable for inserting into the air hole (21) to block the air hole (21) and form a sealed state. When the handle (3) is rotated so that the sealing part is away from the air hole (21), the storage cavity (11) is connected to the outside air through the air hole (21) to balance the air pressure. The handle (3) pushes against the box body (1) through the pushing part (31) to drive the top cover (2) to tilt up. After the human hand passes through the grip opening (38), the top cover (2) is lifted by the handle (3).

2. The one-button opening food storage container according to claim 1, characterized in that, The handle (3) is arched, and both ends of the handle (3) are provided with pivots (34). Both sides of the top cover (2) are provided with connecting holes (23). The pivots (34) are inserted into the connecting holes (23) and are rotatably connected to the connecting holes (23).

3. The one-button opening food storage container according to claim 2, characterized in that, The handle (3) includes an open position and a closed position. When the handle (3) is in the open position, the minimum distance from the axis of the rotating shaft (34) to the box body (1) is greater than the minimum distance from the axis of the rotating shaft (34) to the box body (1) when the handle (3) is in the closed position.

4. The one-button opening food storage container according to claim 3, characterized in that, When in a sealed state, the distance from the axis of the rotating shaft (34) to the lower side of the handle (3) is less than the distance from the axis of the rotating shaft (34) to the upper side of the handle (3).

5. The one-button opening food storage container according to claim 1, characterized in that, The sealing part includes a connecting shaft (32) and a sealing plug (33). The connecting shaft (32) is fixed on the handle (3), and the sealing plug (33) is sleeved on the connecting shaft (32). A limiting block (321) is provided on the connecting shaft (32). The bottom of the limiting block (321) is provided with an inclined first guide surface (322). The inner wall of the sealing plug (33) is provided with a limiting part (331). The limiting part (331) is provided with a second guide surface (332). The first guide surface (322) and the second guide surface (332) are slidably connected to guide the limiting block (321) and the limiting part (331) to engage.

6. The one-button opening food storage container according to claim 1, characterized in that, The edge of the top cover (2) is provided with a mounting cavity suitable for accommodating the handle (3), and the handle (3) and the mounting cavity are rotatably connected; when the sealing part blocks the air hole (21), the handle (3) is accommodated in the mounting cavity.

7. The one-button opening food storage container according to claim 6, characterized in that, The handle (3) is provided with a limiting step (36), which includes a first step (361) and a second step (362). The first step (361) is adapted to abut against the edge of the box body (1). The sealing part is provided on the second step (362). The mounting cavity is provided with a third step (22). The air hole (21) is provided on the third step (22). The height difference between the first step (361) and the second step (362) is adapted to engage the third step (22). When the sealing part blocks the air hole (21), the lower end face of the second step (362) abuts against the upper end face of the third step (22).

8. The one-button openable food storage container according to claim 1, characterized in that, The wall of the air hole (21) is provided with a clamping part (211) protruding inward, and the clamping part (211) is used to clamp the sealing part.

9. The one-button opening food storage container according to claim 1, characterized in that, The handle (3) is provided with an inclined contact surface (37), which makes it easy for the fingers to pry the handle (3) and drive the handle (3) to rotate.

10. The one-button opening food storage container according to any one of claims 1-9, characterized in that, It also includes a sealing ring (4), and the top cover (2) is provided with a clamping groove (24) for installing the sealing ring (4) on its peripheral wall. The edge of the sealing ring (4) protrudes from the clamping groove (24) and slides in connection with the inner wall of the box body (1). When the top cover (2) moves the sealing ring (4) down, the edge of the sealing ring (4) unfolds and abuts against the inner wall of the box body (1) to maintain a sealed state. A cavity (25) is provided above the groove wall of the clamping groove (24). The cavity (25) provides space for the edge deformation of the sealing ring (4) and / or for the rotation of the pushing part (31).

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