Sealing cover assembly for airtight container

Abstract

A sealing cover assembly for airtight container, having a first connecting component provided with a projected portion, a second connecting component provided with a through opening, and a sealing ring provided with a sealing ring body in a closed loop form. The projected portion is removably inserted into the through opening. A position limiting ring is provided on a side wall of the projected portion or the through opening. When the first connecting component closes against the second connecting component, the side wall of the projected portion is in contact with the sealing ring body and presses against the sealing ring body so that the sealing ring body is tightly fitted between the side walls of the projected portion and the through opening.

Description

BACKGROUND OF THE INVENTION

The present invention relates to the technical field of storage equipment, and more specifically relates to a sealing cover assembly for airtight container.

The use of containers like cases, handbags, and bags are very common in daily life. Containers are mainly used for containing objects like food, clothes, and tools which may need to be carried during outdoor activities. In some special situations, containers have to be airtight and waterproof. In the prior art, containers are opened and closed at their openings mainly through airtight and waterproof zippers.

Zippers have the following disadvantages: 1) Zippers are soft and cannot be fixed in shape easily during production, and it is also difficult to assemble the zippers with the containers, thereby affecting production efficiency and the yield rate of good products. 2) Airtight and waterproof zippers are costly and therefore not suitable to be used in common and general containers like cases, handbags and bags, otherwise the resulting products will not be competitive in the market.

In order to solve the present technical problems, the same inventor of the present invention has registered a prior utility model patent CN214268597U in which a novel sealing cover assembly for thermal container is disclosed, comprising a first connecting component 1′ connecting to an upper part of the thermal container, a second connecting component 2′ connecting to a lower part of the thermal container, and a sealing ring 3′; the first connecting component 1′ and the second connecting component 2′ are both made of hard material; a rear side of the first connecting component 1′ and a rear side of the second connecting component 2′ are hinged; a front side of the first connecting component 1′ and a front side of the second connecting component 2′ are provided with a locking mechanism; the second connecting component 2′ is provided with a through opening 21′ in communication with a storage space of the thermal container; the first connecting component 1′ is provided with a projected portion 11′ corresponding to the through opening 21′; the sealing ring 3′ is disposed around inner side walls of the through opening 21′; when the first connecting component 1′ and the second connecting component 2′ are closed against each other, outer side walls of the projected portion 11′ are in contact with the sealing ring 3′ and press against the sealing ring 3′ to deform the sealing ring 3′; as such, the projected portion 11′ and the through opening 21′ are sealed against each other; further, the sealing ring 3′ is mounted in a sealing ring groove 22′ provided around the inner side walls of the through opening 21′. In the above described locking structures, the first connecting component 1′ and the second connecting component 2′ are both made of hard material such that their shapes are fixed without any changes when they are formed during production. Accordingly, it is more convenient to assemble them onto the thermal container, and the assembled structure is firm and secured; further, assembling is efficient and the yield rate of good products is high. Sealing is achieved by the sealing ring 3′ disposed between the outer side walls of the projected portion 11′ and the inner side walls of the through opening 21′. However, during actual use, due to frictions and adhesiveness between the sealing ring 3′ and the projected portion 11′, the sealing ring 3′ may be easily drawn out of the sealing ring groove 22′ by the projected portion 11′ when opening the first connecting component 1′. This results in the sealing ring 3′ falling off from the sealing cover assembly and leads to poor user's experience.

BRIEF SUMMARY OF THE INVENTION

An object of the present invention is to provide a sealing cover assembly for airtight container. A sealing ring is firmly yet detachably mounted to the sealing cover assembly to enhance structural stability.

To achieve the above object, the present invention provides the following technical solutions:

A sealing cover assembly for airtight container, comprising a first connecting component configured to be connected to an upper part of a container, a second connecting component configured to be connected to a lower part of the container, and a sealing ring; the second connecting component is provided with a through opening configured to be in communication with a storage space of the container; a surface of the first connecting component facing towards the second connecting component is provided with a projected portion; the projected portion is removably inserted into the through opening; a first annular position limiting ring is provided around an outer side wall of the projected portion, or a second annular position limiting ring is provided around an inner side wall of the through opening; the sealing ring comprises a sealing ring body in form of a closed loop; a side surface of the sealing ring body facing towards the first annular position limiting ring or the second annular position limiting ring is recessed circumferentially around a perimeter of the side surface of the sealing ring body to form a position limiting groove; an opening of the position limiting groove is annularly provided with a first flange and a second flange protruding towards each other; the first flange and the second flange narrows the opening of the position limiting groove and encloses the first annular position limiting ring or the second annular position limiting ring disposed inside the position limiting groove; when the first connecting component closes against the second connecting component, the sealing ring body is compressed by the outer side wall of the projected portion and the inner side wall of the through opening, so that the sealing ring body is tightly fitted between the outer side wall of the projected portion and the inner side wall of the through opening.

A side surface of the sealing ring body opposite to said side surface of the sealing ring body facing towards the first annular position limiting ring or the second position limiting ring is protruded circumferentially to form at least one annular rib.

Preferably, each of said at least one annular rib is an arc-shaped rib.

Preferably, said at least one annular rib comprises two annular ribs one above another and parallel to each other.

Alternatively, at least one second annular rib is protruded from a surface independent of the sealing ring body; said surface independent of the sealing ring body faces towards the side surface of the sealing ring body which is opposite to said side surface of the sealing ring body facing towards the second annular position limiting ring; or at least one third annular rib is protruded from a surface independent of the sealing ring body; said surface independent of the sealing ring body faces towards a side surface of the sealing ring body which is opposite to said side surface of the sealing ring body facing towards the first annular position limiting ring; said surface independent of the sealing ring body is the outer side wall of the projected portion when said at least one second annular rib is provided, or said surface independent of the sealing ring body is the inner side wall of the through opening when said at least one third annular rib is provided.

Oppositely facing surfaces of the first flange and the second flange are chamfered respectively to form a first chamfered corner and a second chamfered corner respectively.

Upper and lower edges of a side surface of the sealing ring body opposite to said side surface of the sealing ring body facing towards the first annular position limiting ring or the second annular position limiting ring are chamfered respectively to form a third chamfered corner and a fourth chamfered corner respectively.

A rear side of the first connecting component and a rear side of the second connecting component are hinged; a locking mechanism is provided between a front side of the first connecting component and a front side of the second connecting component.

Preferably, the locking mechanism comprises a buckle provided at the front side of the first connecting component, and a buckling groove provided at the front side of the second connecting component.

Preferably, the rear side of the first connecting component is provided with rotation shafts; the rear side of the second connecting component is provided with shaft grooves; the rotation shafts are rotationally mounted to the shaft grooves.

A plurality of magnets are provided on oppositely facing surfaces of the first connecting component and the second connecting component.

When the second annular position limiting ring is disposed around the inner side wall of the through opening, the position limiting groove is disposed around an outer circumferential surface of the sealing ring; the second annular position limiting ring comprises a connecting rib annularly provided and connected to the inner side wall of the through opening, and two extension parts provided perpendicularly to the connecting rib and extend towards opposite directions with respect to each other.

When the first annular position limiting ring is disposed around the outer side wall of the projected portion, the first position limiting groove is disposed around an inner circumferential surface of the sealing ring; the annular position limiting ring comprises a connecting rib annularly provided and connected to the outer side wall of the projected portion, and two extension parts provided perpendicularly to the connecting rib and extend towards opposite directions with respect to each other.

By adopting the technical solutions given above, the present invention achieves the following technical effects:

1. The first annular position limiting ring is disposed on the outer side wall of the projected portion of the first connecting component, or the second annular position limiting ring is disposed on the inner side wall of the through opening of the second connecting component, and the position limiting groove is provided on one side of the sealing ring body facing towards the first annular position limiting ring or the second annular position limiting ring such that when the first annular position limiting ring or the second annular position limiting ring is fitted into the position limiting groove, vertical and horizontal movements of the sealing ring body with respect to the projected portion/through opening is limited. Accordingly, when the first connecting component opens or closes, the sealing ring body will not be displaced with respect to the projected portion/through opening due to action forces like frictions and adhesive forces created on surfaces of the sealing ring body. As such, structural stability is ensured.

2. The sealing ring body is detachable from the first annular position limiting ring or the second annular position limiting ring so that when the sealing ring ages or when it is damaged, it is convenient to replace with a new sealing ring.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded view of a structure described in prior art CN214268597U.

FIG. 2 is a perspective view of a first embodiment of the present invention in a closed condition.

FIG. 3 is a perspective view of a first embodiment of the present invention in an opened condition.

FIG. 4 is a first exploded view of the first embodiment of the present invention.

FIG. 5 is a second exploded view of the first embodiment of the present invention.

FIG. 6 is a front view of the first embodiment of the present invention.

FIG. 7 is a sectional view along A-A of FIG. 6.

FIG. 8 is a perspective view of a second embodiment of the present invention in a closed condition.

FIG. 9 is a first exploded view of the second embodiment of the present invention.

FIG. 10 is a second exploded view of the second embodiment of the present invention.

FIG. 11 is a front view of the second embodiment of the present invention.

FIG. 12 is a sectional view of B-B of FIG. 11.

FIG. 13 is a sectional view of a third embodiment of the present invention.

FIG. 14 is a sectional view of a fourth embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

To understand the technical solutions provided by the present invention, the present invention will be further described in detail below with reference to some embodiments.

As illustrated from FIG. 2 to FIG. 14, the present invention discloses a sealing cover assembly for airtight container, comprising a first connecting component 1 configured to be connected to an upper part of a container, a second connecting component 2 configured to be connected to a lower part of the container, and a sealing ring 3.

The second connecting component 2 is provided with a through opening 21 configured to be in communication with a storage space of the container; a surface of the first connecting component 1 facing towards the second connecting component 2 is provided with a projected portion 11; the projected portion 11 is removably inserted into the through opening 21.

A first annular position limiting ring 12 is provided around an outer side wall of the projected portion 11; alternatively, a second annular position limiting ring 22 is provided around an inner side wall of the through opening 21.

The sealing ring 3 comprises a sealing ring body 31 in form of a closed loop; a side surface of the sealing ring body 31 facing towards the first annular position limiting ring 12 or the second annular position limiting ring 22 is recessed circumferentially around a perimeter of the side surface of the sealing ring body 31 to form a position limiting groove 32; an opening of the position limiting groove 32 is annularly provided with a first flange 33 and a second flange 34 protruding towards each other; the first flange 33 and the second flange 34 narrows the opening of the position limiting groove 32 and encloses the first annular position limiting ring 12 or the second annular position limiting ring 22 disposed inside the position limiting groove 32.

When the first connecting component 1 closes against the second connecting component 2, the sealing ring body 31 is compressed by the outer side wall of the projected portion 11 and the inner side wall of the through opening 21, so that the sealing ring body 31 is tightly fitted between the outer side wall of the projected portion 11 and the inner side wall of the through opening 21.

Specific embodiments of the sealing cover assembly are described below.

The “upper part” of the container as mentioned above refers to a cover part of the container; while the “lower part” of the container as mentioned above refers to a storage part of the container, that is to say, the part of the container given with the storage space.

According to some embodiments, a side surface of the sealing ring body 31 opposite to said side surface of the sealing ring body 31 facing towards the first annular position limiting ring 12 or the second annular position limiting ring 22 is protruded circumferentially to form at least one first annular rib 35. Said at least one first annular rib 35 can enhance the sealing effect of the sealing ring 3 between the projected portion 11 and the through opening 21; besides, said at least one first annular rib 35 may be able to reduce a required thickness of the sealing ring body 31 so as to save costs, on condition that the same sealing effect can be maintained. Alternatively, depending on different embodiments of the first annular position limiting ring 12 or the second annular position limiting ring 22 and thus different embodiments of the sealing ring 3, at least one second annular rib 111 may be protruded from a surface that faces towards the side surface of the sealing ring body 31 which is opposite to said side surface of the sealing ring body 31 facing towards the second annular position limiting ring 22, or at least one third annular rib 211 may be protruded from a surface that faces towards the side surface of the sealing ring body 31 which is opposite to said side surface of the sealing ring body 31 facing towards the first annular position limiting ring 12; in other words, said at least one second annular rib 111 may be protruded from the outer side wall of the projected portion 11 when the second annular position limiting ring 22 is provided around the inner side wall of the through opening 21 so that said at least one second annular rib 111 faces towards the side surface of the sealing ring body 31 which is opposite to said side surface of the sealing ring body 31 facing towards the annular position limiting ring 22, or said at least one third annular rib 211 may be protruded from the inner side wall of the through opening 21 when the first annular position limiting ring 12 is provided around the outer side wall of the projected portion 11 so that said at least one third annular rib 211 faces towards the side surface of the sealing ring body 31 which is opposite to said side surface of the sealing ring body 31 facing towards the first annular position limiting ring 12.

Further, when said at least one first annular rib 35 is protruded from the side surface of the sealing ring body 31 opposite to said side surface of the sealing ring body 31 facing towards the first annular position limiting ring 12 or the second annular position limiting ring 22, each of said at least one first annular rib 35 is an arc-shaped rib, which can reduce an axial resistance imposed by said at least one first annular rib 35 against the first connecting component 1 or the second connecting component 2 when the first connecting component 1 closes against the second connecting component 2. As such, said at least one first annular rib 35 can be more easily pressed against by the inner side wall of the projected portion 11 of the first connecting component 1 or by the outer side wall of the through opening 21 of the second connecting component 2. Generally, said at least one first annular rib 35 comprises two annular ribs one above another and parallel to each other.

According to some embodiments, oppositely facing surfaces of the first flange 33 and the second flange 34 are chamfered respectively to form a first chamfered corner 331 and a second chamfered corner 341 respectively, so that the opening of the position limiting groove 32 circumferentially opened around the sealing ring body 31 is tapered to be widened towards an outer side of the opening, thereby facilitating the insertion of the first annular position limiting ring 12 or the second annular position limiting ring 22.

According to some embodiments, upper and lower edges of the side surface of the sealing ring body 31 opposite to said side surface of the sealing ring body 31 facing towards the first annular position limiting ring 12 or the second annular position limiting ring 22 are chamfered respectively to form a third chamfered corner 36 and a fourth chamfered corner 37 respectively so that frictions imposed by the sealing ring 3 upon closing of the first connecting component 1 against the second connecting component 2 can be reduced.

According to some embodiments, both the first connecting component 1 and the second connecting component 2 are made of hard material. For example, both the first connecting component 1 and the second connecting component 2 are injection molded parts made of plastic which can be injection molded.

According to some embodiments, certain structures can be provided between the first connecting component 1 and the second connecting component 2 so that the first connecting component 1 and the second connecting component 2 are connected. Accordingly, even the container is not designed to connect the cover part and the storage part thereof, since the cover part is connected to the first connecting component 1 and the storage part is connected to the second connecting component, further connection between the first connecting component 1 and the second connecting component 2 enables indirect connection between the cover part and the storage part such that the cover part is still connected to the storage part and will not fall off or get lost when a user opens the container.

FIGS. 2-7 illustrate a first embodiment of the sealing cover assembly.

The position limiting groove 32 is disposed around an outer circumferential surface of the sealing ring 3; the second annular position limiting ring 22 is disposed around the inner side wall of the through opening 21; the second annular position limiting ring 22 comprises a first connecting rib 221 annularly provided and connected to the inner side wall of the through opening 21, and a first extension 222 and a second extension 223 provided perpendicularly to the first connecting rib 221 and extend towards opposite directions with respect to each other; therefore a cross section of the second annular position limiting ring 22 corresponds to a cross section of the position limiting groove 32; in other words, the cross section of the second annular position limiting ring 22 and the cross section of the position limiting groove 32 are both having a T-shape, which is particularly in a shape of a type letter “T” rotated by ninety degrees. Further, cooperative arrangements between the first extension 222 and the first flange 33 and between the second extension 223 and the second flange 34 limit vertical and horizontal movements of the sealing ring body 31 so as to prevent the sealing ring 3 from disengagement from the inner side wall of the through opening 21.

A rear side of the first connecting component 1 and a rear side of the second connecting component 2 are hinged. A locking mechanism is provided between a front side of the first connecting component 1 and a front side of the second connecting component 2. Hinging between the first connecting component 1 and the second connecting component 2 enables connection between the first connecting component 1 and the second connecting component 2. The locking mechanism serves to maintain the first connecting component 1 to be closed against the second connecting component 2.

Further, the locking mechanism comprises a buckle 13 provided at the front side of the first connecting component 1, and a buckling groove 23 provided at the front side of the second connecting component 2. When the first connecting component 1 closes against the second connecting component 2, the buckle 13 buckles into the buckling groove 23 so that the first connecting component 1 is buckled to the second connecting component 2. Further, after the first connecting component 1 closes against the second connecting component 2, the buckle 13 are positioned within the buckling groove 23 and flushes with the front side of the first connecting component 1 and the front side of the second connecting component 2 so that no protrusions will be formed on the front side of the first connecting component 1 and the front side of the second connecting component 2, thereby achieving a flat and smooth surface.

Further, the rear side of the first connecting component 1 is provided with rotation shafts 14; the rear side of the second connecting component 2 is provided with shaft grooves 24; the rotation shafts 14 are rotationally mounted to the shaft grooves 24 to achieve hinging between the first connecting component 1 and the second connecting component 2. Besides, other hinging structures such as conventional hinges may be alternatively provided between the first connecting component 1 and the second connecting component 2 for hinging purpose.

Two first annular ribs 35 are protruded circumferentially around a side surface of the sealing ring body 31 opposite to the side surface of the sealing ring body 31 disposed with the position limiting groove 32. The first annular ribs 35 enhance the sealing effect of the sealing ring 3 between the projected portion 11 and the through opening 21.

FIGS. 8-12 illustrate a second embodiment of the sealing cover assembly.

The position limiting groove 32 is disposed around an inner circumferential surface of the sealing ring 3; the first annular position limiting ring 12 is disposed around the outer side wall of the projected portion 11; the first annular position limiting ring 12 comprises a second connecting rib 121 annularly provided and connected to the outer side wall of the projected portion 11, and a third extension 121 and a fourth extension 123 provided perpendicularly to the second connecting rib 121 and extend towards opposite directions with respect to each other; therefore a cross section of the first annular position limiting ring 12 corresponds to a cross section of the position limiting groove 32; in other words, the cross section of the first annular position limiting ring 12 and the cross section of the position limiting groove 32 are both having a T-shape, which is particularly in a shape of a type letter “T” rotated by ninety degrees. Further, cooperative arrangements between the third extension 122 and the first flange 33 and between the fourth extension 123 and the second flange 34 limit vertical and horizontal movements of the sealing ring body 31 so as to prevent the sealing ring 3 from disengagement from the outer side wall of the projected portion 11.

The first connecting component 1 and the second connecting component 2 are two independent components. The projected portion 11 of the first connecting component 1 is tightly fitted into the through opening 21 of the second connecting component 2 via the sealing ring 3 in between the projected portion 11 and the through opening 21.

Further, a plurality of magnets 4 are provided on oppositely facing surfaces of the first connecting component 1 and the second connecting component 2. The first connecting component 1 can be more firmly fitted with the second connecting component 2 via magnetic forces provided by the magnets 4. In particular, provision of magnets 4 is beneficial to achieve better water leakage prevention when the container is tilted by ninety degrees (i.e. the through opening 21 is tilted sideways).

Two third annular ribs 211 are provided circumferentially around the inner side wall of the through opening 21 so as to enhance the sealing effect of the sealing ring 3 between the projected portion 11 and the through opening 21.

The sealing cover assembly described above can be applied to different containers like cases, handbags, and bags, especially containers that have a demanding requirement for airtightness. The sealing cover assembly enables opening and closing as well as sealing and unsealing of the cover part of the container against the storage part of the container. According to different product requirements, the present invention can be embodied as different products like thermal bag and waterproof bag.

FIG. 13 illustrates a third embodiment of the sealing cover assembly.

The third embodiment is different from the first embodiment in that, instead of providing the first annular ribs 35, the third embodiment provides two second annular ribs 111 around the outer side wall of the projected portion 11. The second annular ribs 111 press against the sealing ring 3 to enhance the sealing effect of the sealing ring 3 between the projected portion 11 and the through opening 21 when the first connecting component 1 closes against the second connecting component 2.

FIG. 14 illustrates a fourth embodiment of the sealing cover assembly.

The fourth embodiment is different from the second embodiment in that, instead of providing the third annular ribs 211, the fourth embodiment provides two first annular ribs 35 around the side surface of the sealing ring body 31 facing towards the inner side wall of the through opening 21 to enhance the sealing effect of the sealing ring 3 between the projected portion 11 and the through opening 21 when the first connecting component 1 closes against the second connecting component 2.

According to the embodiments described above, the first annular position limiting ring 12 is disposed on the outer side wall of the projected portion 11 of the first connecting component 1, or the second annular position limiting ring 22 is disposed on the inner side wall of the through opening 21 of the second connecting component 2, and the position limiting groove 32 is provided on one side of the sealing ring body 31 facing towards the first annular position limiting ring 12 or the second annular position limiting ring 22 such that when the first annular position limiting ring 12 or the second annular position limiting ring 22 is fitted into the position limiting groove 32, vertical and horizontal movements of the sealing ring body 31 with respect to the projected portion 11/through opening 21 is limited. Accordingly, when the first connecting component 1 opens or closes, the sealing ring body 31 will not be displaced with respect to the projected portion 11/through opening 21 due to action forces like frictions and adhesive forces created on surfaces of the sealing ring body 31. As such, structural stability is ensured. The sealing ring body 31 is detachable from the first annular position limiting ring 12 or the second annular position limiting ring 22 so that when the sealing ring 31 ages or when it is damaged, it is convenient to replace with a new sealing ring 31.

Claims

1. A sealing cover assembly for airtight container, comprising a first connecting component configured to be connected to an upper part of a container, a second connecting component configured to be connected to a lower part of the container, and a sealing ring; the second connecting component is provided with a through opening configured to be in communication with a storage space of the container; a surface of the first connecting component facing towards the second connecting component is provided with a projected portion; the projected portion is removably inserted into the through opening; a first annular position limiting ring is provided around an outer side wall of the projected portion, or a second annular position limiting ring is provided around an inner side wall of the through opening; the sealing ring comprises a sealing ring body in form of a closed loop; a side surface of the sealing ring body facing towards the first annular position limiting ring or the second annular position limiting ring is recessed circumferentially around a perimeter of the side surface of the sealing ring body to form a position limiting groove; an opening of the position limiting groove is annularly provided with a first flange and a second flange protruding towards each other; the first flange and the second flange narrows the opening of the position limiting groove and encloses the first annular position limiting ring or the second annular position limiting ring disposed inside the position limiting groove; when the first connecting component closes against the second connecting component, the sealing ring body is compressed by the outer side wall of the projected portion and the inner side wall of the through opening, so that the sealing ring body is tightly fitted between the outer side wall of the projected portion and the inner side wall of the through opening.

2. The sealing cover assembly of claim 1, wherein a side surface of the sealing ring body opposite to said side surface of the sealing ring body facing towards the first annular position limiting ring or the second position limiting ring is protruded circumferentially to form at least one annular rib.

3. The sealing cover assembly of claim 2, wherein each of said at least one annular rib is an arc-shaped rib.

4. The sealing cover assembly of claim 3, wherein said at least one annular rib comprises two annular ribs one above another and parallel to each other.

5. The sealing cover assembly of claim 1, wherein when the second annular position limiting ring is provided, at least one second annular rib is protruded from a surface independent of the sealing ring body where said surface independent of the sealing ring body faces towards a side surface of the sealing ring body which is opposite to said side surface of the sealing ring body facing towards the second annular position limiting ring; or, when the first annular position limiting ring is provided, at least one third annular rib is protruded from a surface independent of the sealing ring body where said surface independent of the sealing ring body faces towards a side surface of the sealing ring body which is opposite to said side surface of the sealing ring body facing towards the first annular position limiting ring; said surface independent of the sealing ring body is the outer side wall of the projected portion when said at least one second annular rib is provided, or said surface independent of the sealing ring body is the inner side wall of the through opening when said at least one third annular rib is provided.

6. The sealing cover assembly of claim 1, wherein oppositely facing surfaces of the first flange and the second flange are chamfered respectively to form a first chamfered corner and a second chamfered corner respectively.

7. The sealing cover assembly of claim 1, wherein upper and lower edges of a side surface of the sealing ring body opposite to said side surface of the sealing ring body facing towards the first annular position limiting ring or the second annular position limiting ring are chamfered respectively to form a third chamfered corner and a fourth chamfered corner respectively.

8. The sealing cover assembly of claim 1, wherein a rear side of the first connecting component and a rear side of the second connecting component are hinged; a locking mechanism is provided between a front side of the first connecting component and a front side of the second connecting component.

9. The sealing cover assembly of claim 8, wherein the locking mechanism comprises a buckle provided at the front side of the first connecting component, and a buckling groove provided at the front side of the second connecting component.

10. The sealing cover assembly of claim 8, wherein the rear side of the first connecting component is provided with rotation shafts; the rear side of the second connecting component is provided with shaft grooves; the rotation shafts are rotationally mounted to the shaft grooves.

11. The sealing cover assembly of claim 1, wherein a plurality of magnets are provided on oppositely facing surfaces of the first connecting component and the second connecting component.

12. The sealing cover assembly of claim 1, wherein when the second annular position limiting ring is disposed around the inner side wall of the through opening, the position limiting groove is disposed around an outer circumferential surface of the sealing ring; the second annular position limiting ring comprises a connecting rib annularly provided and connected to the inner side wall of the through opening, and two extension parts provided perpendicularly to the connecting rib and extend towards opposite directions with respect to each other.

13. The sealing cover assembly of claim 1, wherein when the first annular position limiting ring is disposed around the outer side wall of the projected portion, the first position limiting groove is disposed around an inner circumferential surface of the sealing ring; the annular position limiting ring comprises a connecting rib annularly provided and connected to the outer side wall of the projected portion, and two extension parts provided perpendicularly to the connecting rib and extend towards opposite directions with respect to each other.