CN114291416A

CN114291416A - Sealing ring, production process thereof and preservation box cover with sealing ring

Info

Publication number: CN114291416A
Application number: CN202111385205.2A
Authority: CN
Inventors: 苏庚; 尹杰; 吴浩杰
Original assignee: Yangjiang Ikea Industry And Trade Co ltd
Current assignee: Yangjiang Ikea Industry And Trade Co ltd
Priority date: 2021-11-22
Filing date: 2021-11-22
Publication date: 2022-04-08
Anticipated expiration: 2041-11-22
Also published as: CN114291416B

Abstract

The invention relates to the technical field of accessories of preservation boxes, in particular to a sealing ring, a production process thereof and a preservation box cover with the sealing ring. Wherein, the sealing washer, including sealing strip, ventilative piece, the sealing strip is open annular structure, the annular opening part of sealing strip is located to ventilative piece, and ventilative piece both ends are connected with the both ends of sealing strip respectively, are equipped with the bleeder vent that makes the sealing washer inboard and outside form airflow channel at ventilative piece. The sealing ring can realize sealing or ventilation under different use environments, and integrates two contradictory functions into a whole; the air holes are formed in the sealing ring, so that the sealing effect of the common sealing ring is realized when the air holes are plugged, and the ventilation effect is realized when the air holes are unplugged.

Description

Sealing ring, production process thereof and preservation box cover with sealing ring

Technical Field

The invention relates to the technical field of accessories of preservation boxes, in particular to a sealing ring, a production process thereof and a preservation box cover with the sealing ring.

Background

In-process at the use freshness preservation box storage food, especially pack into the freshness preservation box with hot food or put into the refrigerator with the freshness preservation box after, because expend with heat and contract with cold's relation, the inside atmospheric pressure of freshness preservation box can be less than the outside atmospheric pressure of freshness preservation box, need overcome the resistance that this kind of pressure difference produced when opening the lid, it is very hard to lead to opening the freshness preservation box, use experience is not good, and this kind of phenomenon can be ascribed to the sealing washer in the freshness preservation box, the sealing washer has realized sealed effect, when playing fresh-keeping effect, but because of the gas tightness well leads to the freshness preservation box to produce inside and outside atmospheric pressure difference after expend with heat and contract with cold, and be difficult to open.

Disclosure of Invention

The invention aims to overcome the defects that a sealing ring for a preservation box in the prior art is sealed when the preservation box is tightly covered, and the cover is still very laboursome to open when a buckle is opened after the preservation box expands with heat and contracts with cold.

In order to solve the technical problems, the invention adopts the technical scheme that:

the utility model provides a sealing washer, includes sealing strip, ventilative piece, the sealing strip is open annular structure, the annular opening part of sealing strip is located to ventilative piece, and ventilative piece both ends are connected with the both ends of sealing strip respectively, make the inboard bleeder vent that forms airflow channel with the outside of sealing washer at ventilative piece.

As is known, a sealing ring plays a role in sealing, air tightness and air leakage are two mutually contradictory concepts, and the conventional sealing ring cannot be provided with air holes structurally, so that the air leakage is caused by the air holes, and the sealing ring loses the sealing function; in order to realize different functions of the preservation box in different states, the sealing ring is matched with the preservation box cover, the ventilation hole is blocked by the preservation box cover, and the preservation function can be realized when the preservation box needs to be sealed and preserved by using the sealing function of the sealing ring; when the preservation box cover is opened, the air holes can be removed from being blocked, the sealing ring loses the sealing function, the inside and outside air pressure difference of the preservation box can be realized after the preservation box expands with heat and contracts with cold, and the preservation box is convenient to open. The sealing strip with the annular structure can be matched with the preservation box cover.

Preferably, the air holes horizontally penetrate through the sealing ring and are equal to the upper surface and the lower surface of the sealing ring in distance.

Furthermore, a positioning part is arranged on the sealing strip or the ventilating piece, and the positioning part can be arranged in a protruding or sunken mode. The positioning part is used for limiting the sealing ring, and the sealing ring is convenient to install on other parts. And the cross-sectional area of the sealing ring on the positioning part is different from that of the rest part. The positioning part can be arranged on the sealing strip and also can be arranged on the air permeable piece.

Preferably, the air permeable member is in a convex shape.

Furthermore, the positioning part is arranged on the air permeable piece, the air permeable piece also comprises a connecting part, and the positioning part is arranged on the side part of the connecting part and is connected with the connecting part; two ends of the connecting part are respectively connected with two ends of the sealing strip; the air holes comprise a first air hole arranged on the connecting part and a second air hole arranged on the positioning part, and the first air hole is communicated with the second air hole. The connecting part and the positioning part are integrally formed. Connecting portion are used for being connected sealing strip and ventilative piece, and location portion is used for making ventilative piece can form spacingly with the preservation box lid, ensures that the preservation box lid can realize the shutoff to the bleeder vent, realizes fresh-keeping function, also can ensure simultaneously that the shutoff back of removing the preservation box lid to the bleeder vent makes inside the outside gas can follow the bleeder vent gets into the preservation box, realizes the inside and outside zero-pressure differential of preservation box, the opening of the preservation box of being convenient for. The first air hole and the second air hole are communicated, so that air can enter the preservation box from the outside.

Furthermore, a concave structure is arranged on the positioning part, and the second air holes are formed in the concave structure. The arrangement of the concave structure can increase the contact area between the plugging piece and the sealing ring, which is connected with the air hole of the sealing ring in a butting manner to plug, and improve the sealing effect. And the sunk structure is convenient for carry on spacingly to the shutoff piece on the fresh-keeping lid, makes the shutoff piece more excellent to the shutoff effect of second bleeder vent, avoids the aversion of shutoff piece to lead to unable realization airtight fresh-keeping effect in the use.

Further, the sealing strip and the air permeable piece are made of flexible materials. The sealing strip and the air-permeable member of flexible material can achieve a sealing effect by utilizing a larger deformation amount thereof when being pressed.

Further, the sealing strip is of a hollow structure. The sealing strip with the hollow structure can save material cost on one hand, and on the other hand, the sealing strip can have a larger deformation space after being extruded, so that the sealing strip has better sealing performance.

Further, the hollow interior of the sealing strip is provided with a reinforcing rib extending transversely on the side wall. In order to make the sealing strip have proper rigidity to make it firmly and tightly contact with the wall of the cover channel, a reinforcing rib is provided to make the section of the sealing strip be in a Chinese character ri shape, so that the strength of the sealing element can be further improved. Of course, there are other arrangements of the bead reinforcement as will be appreciated by those skilled in the art.

Furthermore, the two ends of the air-permeable piece are respectively inserted into the two ends of the sealing strip for interference insertion. The sealing strip and the ventilation piece can be connected in an inserting mode or in an adhering mode.

Further, a plurality of ribs are arranged on the top and/or the bottom of the sealing strip and the top and/or the bottom of the air permeable piece. The rib can increase the frictional force between sealing washer and lid body or the box body, and the multichannel rib has formed multiple sealed, further promotes sealing performance.

Further, the cross-sectional shapes of the sealing strip and the connecting part at the mutual connection part are the same. The two butted parts have the same cross section appearance at the butted position, which is beneficial to controlling the butted precision in process, furthermore, the sealing strip can be hollow, but the connecting part is not hollow, so that the cross sections of the two parts are different, but the cross section appearance can be the same.

The invention also provides a production process of the sealing ring, which specifically comprises the following steps:

s1: manufacturing the sealing strip through extrusion molding, and manufacturing the air-permeable piece through compression molding;

s2: and respectively bonding or splicing two ends of the air-permeable piece with two ends of the sealing strip.

Different from the integrally formed sealing ring used in the preservation box in the prior art, the sealing ring is formed by assembling two parts, namely a sealing strip and a ventilating piece, after being manufactured by different processing technologies, the sealing ring can be made of silica gel, and the silica gel sealing ring mainly comprises two technologies of compression molding and extrusion molding. Extrusion is generally used for producing a tubular or strip-shaped product having no length limitation and a constant cross section, and therefore extrusion is advantageous in producing a product having a hollow structure formed in the longitudinal direction, but cannot form a through-hole penetrating opposite surfaces, i.e., a through-hole penetrating in the width direction, in a tubular or strip-shaped product. The compression molding production mode is suitable for solid products with fixed overall dimension. Therefore, the sealing strip and the air permeable part are manufactured separately, the advantages of the two processes can be fully utilized, particularly when sealing rings with different circumferences need to be produced, only the length of the sealing strip needs to be adjusted, the air permeable part can share the same set of mold for production, and the mold cost is greatly reduced. The sealing strip is obtained in an extrusion molding mode, the ventilating piece is obtained in a compression molding mode, and the ventilating holes of the ventilating piece penetrate through the surfaces of two opposite sides in the width direction of the ventilating piece, so that an air flow channel is formed between the inner side and the outer side of the sealing ring. Specifically, the sealing strip has two connecting ends in the length direction, the ventilating element has ports connected with the two connecting ends of the sealing strip in the length direction, the ventilating element is provided with ventilating holes in the width direction in a penetrating mode, and the sealing strip and the ventilating element can be jointed in a bonding mode to form a closed annular body.

The invention also provides a fresh-keeping box cover, which comprises a cover body and the sealing ring, wherein the sealing ring is arranged on the lower surface of the cover body; the cover body is at least symmetrically provided with two buckles for being clamped with the preservation box, and the two buckles are rotatably connected with the edge of the cover body; the buckle is provided with a plugging piece for plugging the air hole corresponding to the air hole of the sealing ring, and the plugging piece can be abutted against the air hole.

The fresh-keeping box cover can be clamped with the box body by the aid of the buckle on the cover body, the buckle is rotatably connected with the cover body, and the air holes in the sealing ring can be blocked or unblocked by the aid of the blocking piece arranged on the buckle, so that sealing or unsealing of the sealing ring is realized. Specifically, after the preservation box is covered and clamped by the buckle, the plugging piece can be abutted against the air hole, and the preservation function of the preservation box can be realized integrally; after the preservation box expands with heat and contracts with cold, the buckle is opened, the buckle is enabled to rotate upwards relative to the cover body, at the moment, the plugging piece can leave the air hole, external gas of the preservation box enters the preservation box, and the preservation box can be easily opened due to zero pressure difference between the inside and the outside.

Furthermore, the circumferential edge of the cover body is provided with a mounting groove, the mounting groove is a groove body formed by surrounding walls and inner surrounding walls, the surrounding walls and the inner surrounding walls are both of closed frame-shaped structures, the surrounding walls are arranged on the circumferential edge of the cover body, and the inner surrounding walls are arranged on the inner side of the surrounding walls; the sealing ring is arranged in the mounting groove; the peripheral wall is provided with a first notch which can avoid the plugging piece. The outer peripheral wall and the inner peripheral wall both have a limiting effect on the sealing ring, so that the sealing ring is convenient to mount, and the sealing ring can be prevented from moving randomly after the sealing ring is mounted; the peripheral wall and the inner wall are communicated with each other at the air hole of the sealing ring to form an air flow channel, so that the air can enter the inside of the preservation box from the outside after the preservation box is covered. The first notch can avoid the blocking piece, so that the blocking piece can directly act on the sealing ring to block or unblock the air holes. When the sealing ring needs to be disassembled, the sealing ring can be conveniently taken out at the first notch. When sealing washer location portion is the protrusion setting, can fix a position with first breach mutually supporting.

Further, the height of the inner wall is larger than that of the sealing ring. The peripheral wall and the inner peripheral wall have a certain height difference, so that the sealing ring is partially exposed outside the mounting groove after being mounted, and the sealing ring is convenient to detach, clean and replace. And when covering the body, interior enclosure wall can with box body inner wall butt to the restriction covers the body in box body open-ended position, simultaneously, the rigidity of lid can be increased in the setting of interior enclosure wall and outer enclosure wall, promotes sealed effect, and the height of enclosure wall is higher more, and is better to the effect that lid rigidity promoted.

Furthermore, the sealing ring is provided with a ventilation groove at one side of the ventilation hole opposite to the inner surrounding wall, and the ventilation groove is communicated with the ventilation hole and the upper surface and the lower surface of the sealing ring. The ventilation groove is directly arranged on the sealing ring, then the non-airtight structure formed by rigid connection between the inner wall of the cover body and the box body is utilized for ventilation, the upper structure and the lower structure of the sealing ring are symmetrical, and the sealing ring can be normally used even if the sealing ring is installed upside down. Of course, the air holes can also be obliquely arranged, and the end parts of the air holes close to the inner wall are positioned at the positions below the inner wall.

Furthermore, the position of the inner wall corresponding to the air hole of the sealing ring is provided with a ventilation structure which can enable the air hole to be communicated with the inner side of the cover body, and the ventilation structure is a third air hole or a groove or a second notch. The ventilation structure is communicated with the ventilation holes in the sealing ring to form an airflow channel, so that external air can enter the preservation box conveniently, zero pressure difference between the inside and the outside is realized, and the preservation box can be opened conveniently.

Further, the blocking piece is a flexible part and is detachably connected with the buckle. The pliability of flexible component is better, carries out the shutoff through flexible shutoff piece to the sealing washer bleeder vent, can prevent to lead to both to cooperate not good because of the dimensional error that produces in the production process, area of contact is bigger when making the butt, and sealed effect is more excellent.

Further, set up the through-hole on the buckle, the shutoff piece is T type structure, and the shutoff piece pegs graft with the buckle, and the shutoff piece is followed the through-hole passes and with the bleeder vent butt on the sealing washer. The shutoff piece can be independent, pegs graft with the buckle, and passes behind the buckle and the direct butt of sealing washer forms shutoff or deblocking to the bleeder vent of sealing washer.

Furthermore, a film is arranged on the sealing ring in a manner of extending outwards, the film is positioned between the air holes and the plugging piece and is inserted into and penetrates through the buckle, and the film can leave the air holes together with the plugging piece or plug the air holes under the abutting of the plugging piece when the film can rotate relative to the cover body along with the buckle. When the film is used for plugging piece and buckle integrated into one piece, increase the shutoff of one deck flexibility between rigid plugging piece and flexible ventilative portion, further promote the sealed effect of plugging piece and sealing washer.

Further, the blocking piece and the buckle or the sealing ring are integrally formed. The plugging piece and the buckle are integrally formed, or the plugging piece and the sealing ring are integrally formed, so that the processing and manufacturing cost can be reduced, and the number of parts is reduced. The material of the buckle is different from that of the sealing ring, the buckle can be made of plastic, and the sealing ring is usually made of silica gel or rubber, so that when the blocking piece is integrally formed with the sealing ring, the effect is better for three reasons, firstly, the silica gel or rubber is made of a flexible material, and the blocking piece can be abutted and deformed with the concave structure of the positioning part on the sealing ring to achieve a better sealing effect; and secondly, the plugging piece is used for realizing plugging by abutting against the sealing ring, the plugging piece and the sealing ring are made of the same material, so that the performance is closer, and the abutting is more in place. When the plugging piece and the sealing ring are integrally formed, mounting hole positions need to be reserved on the buckle, so that the plugging piece can be mounted by inserting the buckle, and when the buckle is opened and rotates relative to the cover body, the plugging piece moves along with the buckle and further leaves the sealing ring, and the plugging piece can be in a state of being abutted or not in contact with the sealing ring, but is always connected with the buckle; and thirdly, the problem that the sealing and blocking piece is lost due to accidental falling in the using process, so that the preservation box cover cannot realize the sealing function is solved. Within the scope of the knowledge of the skilled person, the blocking element may also be a separate element, preferably made of silicone or rubber, which is plugged or snapped into the snap.

Compared with the prior art, the invention has the beneficial effects that:

the sealing ring disclosed by the invention can be used for sealing and ventilating, and integrates two contradictory functions; the air holes are formed in the sealing ring, so that the sealing effect of a common sealing ring is realized when the air holes are plugged, and the ventilation effect is realized when the air holes are unplugged; according to the preservation box cover provided with the sealing ring, the plugging piece arranged on the buckle on the preservation box cover is matched with the air hole of the sealing ring, so that the air hole is plugged or unsealed.

Drawings

FIG. 1 is a schematic structural diagram of a seal ring according to the present invention;

FIG. 2 is a schematic view of a seal ring installation according to the present invention;

FIG. 3 is a first directional structural view of the air permeable member;

FIG. 4 is a second directional structural view of the air permeable member;

FIG. 5 is a cross-sectional view of the air permeable member;

FIG. 6 is a schematic structural view of a fresh-keeping box cover with a sealing ring removed according to the present invention;

FIG. 7 is a view showing a state of use of a fresh keeping box cover according to the present invention;

FIG. 8 is a view showing a use state of the fresh keeping box cover in a fastening state when the ventilating structure is a groove;

FIG. 9 is a view showing a use state of the fresh keeping box cover in a state of being unlocked by the fastener when the ventilation structure is the groove;

FIG. 10 is a view showing a state of use in a state where the freshness protection package cover is fastened when the ventilation structure is the second notch and the blocking member is an independent flexible member;

FIG. 11 is a view showing a state of use in a state where the venting structure is a third venting hole and the blocking member and the venting member are integrally formed in a state where the fresh food container cover is fastened;

FIG. 12 is a view showing a use state of a fresh keeping box cover with a film added and a vent groove formed in a sealing ring in a fastening state;

fig. 13 is a partially enlarged view of fig. 12 at a.

The graphic symbols are illustrated as follows:

1. a sealing strip; 2. a gas permeable member; 21. a connecting portion; 211. a ventilation groove; 22. a positioning part; 221. a recessed structure; 3. air holes are formed; 31. a first air vent; 32. a second air hole; 4. ribs; 5. mounting grooves; 51. a peripheral wall; 511. a first notch; 52. an inner surrounding wall; 521. a breathable structure; 6. buckling; 61. a cover plate; 62. a claw; 7. a blocking member; 8. a film; 101. a seal ring; 102. a cover body; 103. a box body.

Detailed Description

The present invention will be further described with reference to the following embodiments. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.

Examples

Fig. 1 to 5 show an embodiment of a sealing ring according to the present invention, which includes a sealing strip 1 and a gas-permeable member 2, where the sealing strip 1 has an open annular structure, and preferably, the cross section of the sealing strip 1 is rectangular, circular or elliptical, but may have other shapes; the air permeable piece 2 is arranged at the annular opening of the sealing strip 1, two ends of the air permeable piece 2 are respectively connected with two ends of the sealing strip 1, the air permeable piece 2 and the sealing strip 1 can be bonded, blind holes can be arranged at two ends of the air permeable piece 2 or two ends of the sealing strip 1, two ends of the sealing strip 1 and two ends of the air permeable piece 2 are respectively spliced, and the air permeable piece 2 and the sealing strip are in interference fit, so that the connection reliability can be improved, and the sealing performance can be improved; the ventilation hole 3 is arranged on the ventilation piece 2. Preferably, the ventilating piece 2 is of a convex structure, the large end part of the convex structure is respectively connected with the two ends of the sealing strip 1, and the small end part of the convex structure is arranged towards the outer side of the sealing strip 1; the air holes 3 are arranged along the central axis of the convex-shaped air permeable member 2. Preferably, the sealing strip 1 and the air permeable member 2 are made of flexible materials.

Further, the air permeable member 2 includes a connecting portion 21 and a positioning portion 22 connected to each other, and the positioning portion 22 is disposed on a side portion of the connecting portion 21; two ends of the connecting part 21 are respectively connected with two ends of the sealing strip 1; the air holes 3 include a first air hole 31 formed in the connecting portion 21 and a second air hole 32 formed in the positioning portion 22, and the first air hole 31 is communicated with the second air hole 32. Preferably, the first vent hole 31 and the second vent hole 32 are both circular holes, and the axes of the first vent hole 31 and the second vent hole 32 are coincident. The positioning portion 22 is provided with a concave structure 221, and the second ventilation hole 32 is provided in the concave structure 221. The concave structure 221 is an arc-shaped structure that is concave towards the connecting portion 21 side along the surface of the positioning portion 22 so as to limit the plugging member 7, and the second air hole 32 is located at the center of the concave structure 221.

Further, the weather strip 1 has a hollow structure. And all be equipped with a plurality of ribs 4 at the top and the bottom of sealing strip 1, the top and the bottom of ventilative 2, a plurality of ribs 4 are parallel to each other, arrange in proper order, encircle whole sealing washer 101 setting. Preferably, the sealing strip 1 and the connecting portion 21 have the same cross-sectional profile at the point of interconnection.

The invention also provides a production process of the sealing ring 101, which specifically comprises the following steps:

s1: manufacturing a sealing strip 1 by extrusion molding, and manufacturing a breathable member 2 by compression molding;

certainly, the sealing strip 1 can also be manufactured by compression molding, but the sealing ring 101 with the cavity cannot be produced by compression molding, and different molds are needed for different shapes and sizes, so that the production cost is high; the sealing strip 1 manufactured by extrusion molding can overcome the defects, the sealing strip 1 manufactured by extrusion molding can be used for producing the sealing strip 1 with a hollow structure, and the sealing strips 1 with different shapes and sizes can be produced to be matched with different preservation box covers, so that the production is simple and convenient, different molds do not need to be additionally manufactured, and the production cost is greatly reduced. Meanwhile, the air permeable piece 2 can also be manufactured by extrusion molding, but the air permeable piece 2 formed by extrusion molding can be processed for the second time to obtain the air vents 3, and the air permeable piece 2 with the air vents 3 can be directly formed for the first time according to a mold by compression molding, so that the production process can be saved, the production efficiency can be improved, and the cost can be saved; therefore, the invention is characterized in that two different processing technologies are adopted according to different characteristics of the sealing strip 1 and the air permeable member 2, and the invention is an optimal implementation mode; moreover, the general sealing ring is a whole and integrally formed, and the structure and function of the sealing ring 101 of the present invention are determined that the sealing ring cannot be manufactured by adopting the common production process.

S2: and respectively bonding or splicing two ends of the air-permeable piece 2 with two ends of the sealing strip 1.

The bonding or splicing is a relatively simple connection mode which is applied to the connection between the sealing strip 1 and the air-permeable piece 2.

As shown in fig. 6 to 13, the present invention further provides a fresh-keeping box cover, comprising a cover body 102 and the above-mentioned sealing ring 101, wherein the circumferential edge of the cover body 102 is provided with an installation groove 5, and the sealing ring 101 is installed in the installation groove 5; a ventilation structure 521 which can enable the ventilation hole 3 to be communicated with the inner side of the cover body 102 is arranged on the mounting groove 5 corresponding to the ventilation hole 3 of the sealing ring 101; at least two buckles 6 used for being clamped with the preservation box are symmetrically arranged on the cover body 102, and the two buckles 6 are rotatably connected with the edge of the cover body 102; the blocking piece 7 for blocking the air hole 3 is arranged on the buckle 6 corresponding to the air hole 3 of the sealing ring 101, and the blocking piece 7 can be abutted against the air hole 3. Preferably, when the fresh-keeping box cover is circular, three buckles 6 are uniformly distributed along the circumferential direction of the cover body 102; when the preservation box cover is square, the number of the buckles 6 is four, and one buckle 6 is arranged on each side face of the cover body 102 respectively, so that the stress of the cover body 102 is more uniform, the sealing performance can be improved, and the service life of the buckles 6 is prolonged. The plugging piece 7 and the buckle 6 or the sealing ring 101 are integrally formed, of course, the plugging piece 7 can also be an independent piece, preferably, the plugging piece 7 and the sealing ring 101 are integrally formed, when the plugging piece 7 and the sealing ring 101 are integrally formed, a mounting hole for the plugging piece 7 to pass through is formed in the buckle 6, the plugging piece 7 penetrates through the mounting hole and then is connected with the buckle 6 in an inserting mode, and the buckle 6 can be rotated relative to the cover body 102 along with the buckle.

Further, the buckle 6 includes a cover plate 61 and a latch 62, the latch 62 is disposed on a side of the cover plate 61 that can face the mounting groove 5, and preferably, the latch 62 is located in the middle of the cover plate 61 or at an end away from the cover body 102. And the claws 62 are arranged in a direction parallel to the edge of the cover body 102 to further increase the contact area of the claws 62 and improve the clamping force. The latch 62 may snap into engagement with a flange on the cartridge body 103.

Further, the mounting groove 5 is a groove body enclosed by a peripheral wall 51 and an inner peripheral wall 52, the peripheral wall 51 and the inner peripheral wall 52 are both closed frame-shaped structures, the peripheral wall 51 is arranged at the circumferential edge of the cover body 102, and the inner peripheral wall 52 is arranged at the inner side of the peripheral wall 51; the ventilation structure 521 is arranged on the inner peripheral wall 52; a first recess 511 is provided in the peripheral wall 51 to allow the closure 7 to escape. Preferably, the size of the first notch 511 is matched with the size and shape of the positioning portion 22, so as to limit the positioning portion 22, and the position of the vent hole 3 on the vent member 2 is aligned with the vent structure 521 on the inner peripheral wall 52, so as to achieve the optimal venting effect. Further, the height of the peripheral wall 51 is lower than the height of the inner wall 52. The ventilation structure 521 is a third ventilation hole or a groove or a second notch. The ventilation structure 521 is disposed on the inner wall 52, and when the ventilation structure 521 is a third ventilation hole, the third ventilation hole is disposed on the inner wall 52, so that the first ventilation hole 31, the second ventilation hole 32, and the third ventilation hole can be communicated, thereby forming an airflow channel, and allowing air to enter the preservation box from the outside of the sealing ring 101. Preferably, the third vent is a circular hole, and the aperture of the third vent is greater than or equal to the apertures of the first vent 31 and the second vent 32. Meanwhile, the axis of the third air hole coincides with the axes of the first air hole 31 and the second air hole 32, so that the air flow channel is shortest, and the air circulation is realized at the highest speed. When the ventilation structure 521 is a groove, the wall thickness of the inner wall 52 where the groove is formed on the inner wall 52 is smaller than the wall thickness of the inner wall 52 of the rest part, one end of the groove extends to the end of the inner wall 52 far away from the cover body 102, and the other end is arranged above the ventilation hole 3, so that a certain gap for air circulation is formed between the inner wall 52 at the groove and the end surface of the sealing ring 101. When the ventilation structure 521 is a second notch, that is, the second notch is disposed on the inner wall 52 at the ventilation structure 521, so that the ventilation hole 3 can pass through the inside of the cover body 102 and enter into the preservation box.

In another embodiment, the gasket 3 is provided with a ventilation groove 211 on the side of the ventilation hole 4 opposite to the inner wall 12, and the ventilation groove 211 communicates the ventilation hole 4 with the upper and lower surfaces of the gasket 3. As shown in fig. 12, in this case, the inner wall 12 may be provided with the air-permeable structure 121, or may not be provided with the air-permeable structure 121, without affecting the air-permeable function.

Further, when the blocking piece 7 and the buckle 6 are integrally formed, the film 8 may be disposed on the sealing ring 101 to extend outwards, the film 8 is located between the vent hole 3 and the blocking piece 7, and the film 8 is inserted into and passes through the buckle 6, and the film 8 may leave the vent hole 3 together with the blocking piece 7 when the buckle 6 rotates relative to the cover body 102 or block the vent hole 3 under the abutting of the blocking piece 7. Specifically, the end of the film 8 is connected to the upper edge of the positioning portion 22 on the seal ring 101, the other end of the film 8 is inserted from the buckle 6 and passes through the buckle 6, and a barb structure is provided on the film 8 at the end where the buckle 6 is inserted, so that the film 8 can be inserted from the side of the buckle 6 close to the seal ring 101, but is not easy to slip out of the buckle 6, and when the buckle 6 rotates relative to the cover body 102, the film 8 can follow the movement and then leave the seal ring 101.

In yet another embodiment, the stopper 7 is a flexible member attached to the buckle 6. The plugging piece 7 can be an independent part, a through hole is formed in the buckle 6, the plugging piece 7 is of a T-shaped structure, the plugging piece 7 is connected with the buckle 6 in an inserting mode, and the plugging piece 7 penetrates through the through hole and abuts against the air hole 3 in the sealing ring. In addition, the blocking piece 7 can be integrally formed with the ventilating piece 2, so that the problem that the sealing function of the preservation box cover cannot be realized due to the fact that the blocking piece 7 is accidentally dropped and lost in the using process when the blocking piece 7 is installed on the buckle 6 as an independent part can be avoided.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A sealing ring is characterized by comprising a sealing strip (1) and a ventilating piece (2),

the sealing strip (1) is an open annular structure,

the air permeable piece (2) is arranged at the annular opening of the sealing strip (1), and two ends of the air permeable piece (2) are respectively connected with two ends of the sealing strip (1),

the air holes (3) penetrate through the air permeable piece (2), so that the inner side and the outer side of the sealing ring form air holes (3) of an air flow channel.

2. A sealing ring according to claim 1, characterized in that a positioning part (22) is provided on the sealing strip (1) or the gas permeable member (2), the positioning part (22) being arranged to be convex or concave.

3. A seal ring according to claim 2, characterized in that the positioning portion (22) is provided on the gas permeable member (2),

the air permeable piece (2) further comprises a connecting part (21), and the positioning part (22) is arranged on the side part of the connecting part (21) and connected with the connecting part;

two ends of the connecting part (21) are respectively connected with two ends of the sealing strip (1);

the air holes (3) comprise first air holes (31) arranged on the connecting portion (21) and second air holes (32) arranged on the positioning portion (22), and the first air holes (31) are communicated with the second air holes (32).

4. A seal ring according to claim 3, wherein a recessed structure (221) is provided on the positioning portion (22), and the second vent hole (32) is provided in the recessed structure (221).

5. A seal ring according to claim 4, characterized in that the sealing strip (1) and the venting member (2) are made of a flexible material.

6. A seal ring according to any one of claims 1 to 6, characterized in that the seal strip (1) is of hollow construction.

7. A seal ring according to claim 7, characterized in that the hollow interior of the sealing strip (1) is provided with a reinforcement rib extending transversely on the side wall.

8. A sealing ring according to claim 6, characterized in that the two ends of the air-permeable member (2) are inserted into the two ends of the sealing strip (1) respectively for interference fit.

9. A sealing ring according to claim 1, characterized in that the top and/or bottom of the sealing strip (1), the top and/or bottom of the gas permeable element (2) are provided with ribs (4).

10. A seal ring according to claim 3, characterized in that the cross-sectional profiles of the seal strip (1) and the connecting portion (21) at the mutual connection are identical.

11. A process for producing a sealing ring according to any one of claims 1 to 10, comprising in particular the following steps:

s1: manufacturing a sealing strip (1) by extrusion molding, and manufacturing a breathable piece (2) by compression molding;

s2: and respectively bonding or splicing two ends of the air-permeable piece (2) with two ends of the sealing strip (1).

12. A crisper lid, comprising a lid body (102), a sealing ring (101) according to any of claims 1 to 6, said sealing ring (101) being mounted on the lower surface of said lid body (102); at least two buckles (6) which are used for being clamped with the preservation box are symmetrically arranged on the cover body (102), and the two buckles (6) are rotatably connected with the edge of the cover body (102); the air hole (3) of the corresponding sealing ring (101) on the buckle (6) is provided with a plugging piece (7) for plugging the air hole (3), and the plugging piece (7) can be abutted against the air hole (3).

13. The crisper cover according to claim 12, wherein a mounting groove (5) is provided at the circumferential edge of the cover body (102),

the mounting groove (5) is a groove body formed by surrounding a peripheral wall (51) and an inner peripheral wall (52),

the peripheral wall (51) and the inner peripheral wall (52) are both closed frame-shaped structures, the peripheral wall (51) is arranged at the circumferential edge of the cover body (102), and the inner peripheral wall (52) is arranged at the inner side of the peripheral wall (51);

the sealing ring (101) is arranged in the mounting groove (5); the peripheral wall (51) is provided with a first recess (511) which can be closed off by the closure part (7).

14. Crisper lid according to claim 12, characterised in that the height of said internal wall (52) is greater than the height of said sealing ring (101).

15. The fresh-keeping box cover according to claim 13, wherein the sealing ring (101) is provided with a ventilation groove (211) at one side of the ventilation hole (3) opposite to the inner wall (52), and the ventilation groove (211) is communicated with the upper and lower surfaces of the ventilation hole (3) and the sealing ring (101).

16. The fresh-keeping box cover according to claim 13, wherein a ventilation structure (521) capable of communicating the ventilation hole (3) with the inner side of the cover body (102) is arranged at the position of the inner wall (52) corresponding to the ventilation hole (3) of the sealing ring (101), and the ventilation structure (521) is a third ventilation hole or a groove or a second gap.

17. Crisper cover according to any of claims 12 to 16, characterized in that said closure (7) is a flexible part and is removably connected to said snap (6).

18. The fresh-keeping box cover according to claim 17, characterized in that a through hole is arranged on the buckle (6), the blocking piece (7) is of a T-shaped structure, the blocking piece (7) is inserted into the buckle (6), and the blocking piece (7) penetrates through the through hole and abuts against the air hole (3) on the sealing ring.

19. The crisper cover according to claim 17, characterized in that a film (8) is provided on the air permeable member (2) extending outwards, said film (8) is located between the air permeable hole (3) and the closure member (7), and the film (8) is inserted and set through the buckle (6), the film (8) can leave the air permeable hole (3) together with the closure member (7) or block the air permeable hole (3) under the abutment of the closure member (7) when the buckle (6) rotates relative to the cover body (102).

20. Crisper cover according to claim 12, characterized in that the closure (7) is formed integrally with the snap (6).