Box cover and sealing box

Abstract

The utility model provides a box cover and a sealing box, and belongs to the technical field of food preservation boxes. The sealing ring is connected with the cover body, the sealing ring comprises an inclined part inclined inwards, and the inclined part can generate elastic deformation and can deform to a sealing state; when the inclined part is in a sealed state, a gap exists between the upper surface of the inclined part and the lower surface of the cover body, and the lower surface of the inclined part is located at an angle capable of being attached to a face to be sealed. And when the box cover reaches the sealing position from the contact position, the air pressure in the box is increased so as to assist the inclined part of the sealing ring in sealing.

Description

Technical Field

[0001] The utility model belongs to the technical field of food preservation boxes and relates to a box cover and a sealed box. Background Art

[0002] Sealed boxes (fresh-keeping boxes or lunch boxes) are very commonly used daily necessities. Many students, working people, and people who go out will use lunch boxes to carry meals. Sealing is one of the important properties of sealed boxes.

[0003] For example, an invention patent with application number CN201310461219.7 discloses a heat preservation lunch box, which forms a sealing structure with the box body through a sealing ring on the lid. When the lunch box contains hot food or the food in the box is heated, the air pressure in the lunch box will be higher than the external air pressure. The lid needs to use a larger pressure to press the sealing ring to maintain the sealing effect, or exhaust the lunch box to balance the pressure difference between the inside and the outside. However, it is difficult for the sealing ring of the existing sealed box to maintain the seal when the box body is under positive pressure, so there is room for improvement. Utility Model Content

[0004] The purpose of the utility model is to solve the above problems in the prior art and to provide a box cover and a sealed box.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a box cover, comprising:

[0006] Cover body;

[0007] A sealing ring connected to the cover body, the sealing ring comprising an inwardly inclined portion, the inclined portion being elastically deformable and deformable to a sealing state;

[0008] When the inclined portion is in a sealed state, there is a gap between the upper surface of the inclined portion and the lower surface of the cover body, and the lower surface of the inclined portion is at an angle that can fit the surface to be sealed.

[0009] Preferably, when the gap is in a positive pressure environment, the inclined portion is subjected to pressure to be squeezed toward the surface to be bonded.

[0010] Preferably, the gap has an acute angle shape.

[0011] Preferably, the inclined portion is an annular conical structure, the end of the inclined portion is an annular abutment end, and the inner edge surface of the annular abutment end is an arc surface structure.

[0012] Preferably, the cross-sectional shape of the inclined portion is conical.

[0013] Preferably, the sealing ring further comprises a base portion, the base portion is connected to the cover body, and the inclined portion is integrally connected to the base portion.

[0014] Preferably, a slot is formed on the lower surface of the cover body, and the base portion is interference fit with the slot.

[0015] Preferably, the cover body is provided with two buckle ears, and the two buckle ears are respectively located on two sides of the cover body.

[0016] A sealed box, comprising the box cover and a box body, wherein the top of the box body has a surface to be sealed;

[0017] The cover body of the box lid can be in a contact position or a sealing position relative to the box body; when the cover body reaches the contact position, the end of the inclined portion of the sealing ring contacts the surface to be sealed and seals the box body; when the cover body reaches the sealing position, the inclined portion is in a sealing state, and the lower surface of the inclined portion fits the surface to be sealed.

[0018] Preferably, when the cover body reaches the sealing position from the contact position, the air pressure in the box body increases and forms a positive pressure environment so that the gap is in a positive pressure environment.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] 1. The specially designed sealing ring allows the sealed box to maintain a sealing effect when the inside is in a positive pressure environment, so there is no need to vent the sealed box after sealing. When the box cover reaches the sealing position from the contact position, the air pressure inside the box increases to assist the inclined part of the sealing ring to seal.

[0021] 2. When the box body is in a positive pressure environment, the air pressure inside the box body is higher than the air pressure outside the box body. When the box cover seals the box body, a positive pressure environment can be formed inside the box body. In addition, when hot food is put into the box body and the box cover is closed, the air inside the box body expands and strengthens the positive pressure environment (i.e., increases the air pressure inside the box body). In the above situation, the sealing ring can achieve an excellent sealing effect through the positive pressure environment through the inclined portion.

[0022] 3. When the inclined portion is in a sealed state, the lower surface of the inclined portion is basically in contact with the surface to be sealed, while the upper surface of the inclined portion is at an inclined angle (i.e., inclined to the surface to be sealed or the lower surface of the box body). When the air pressure in the gap acts on the upper surface of the inclined portion, it can better exert pressure on the inclined portion.

[0023] 4. The inner edge of the annular abutment end is an arc surface structure, so it can better contact and fit with the surface to be sealed. When the cover body is in the contact position, the inner edge of the annular abutment end can be sealed inside the box body.

[0024] 5. In the process of the cover body of the box lid moving from the contact position to the sealing position (i.e., the process of the cover body moving from sealing to buckling with the box body), the volume change ratio in the box body is small, and the pressure difference between the inside and outside of the box body is also small (i.e., the positive pressure in the box body is small). Therefore, the box lid only needs a small buckling force to achieve the sealing effect of the sealed box. In the present embodiment, sealing can be achieved through only two buckle ears. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a partial structural schematic diagram of the box cover of the utility model.

[0026] Figure 2 It is a schematic diagram of the local structure when the cover body of the utility model is in the contact position.

[0027] Figure 3 It is a schematic diagram of the local structure when the cover body of the utility model is in the sealing position.

[0028] Figure 4 This is a structural exploded view of the sealing box of the utility model.

[0029] Figure 5 It is a structural schematic diagram of the sealing box of the utility model.

[0030] In the figure, 100, cover body; 110, gap; 120, slot; 130, buckle ear; 200, sealing ring; 210, inclined portion; 211, annular abutment end; 220, base portion; 300, box body; 310, surface to be sealed. DETAILED DESCRIPTION

[0031] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0032] like Figure 1-3 As shown, a box cover comprises: a cover body 100 and a sealing ring 200, wherein the sealing ring 200 is connected to the cover body 100, and the sealing ring 200 comprises an inwardly inclined inclined portion 210, wherein the inclined portion 210 can produce elastic deformation and can be deformed to a sealed state; when the inclined portion 210 is in a sealed state, there is a gap 110 between the upper surface of the inclined portion 210 and the lower surface of the cover body 100, and the lower surface of the inclined portion 210 is at an angle that can fit with the surface 310 to be sealed.

[0033] The sealing ring 200 is connected to the edge of the lower surface of the cover body 100, and the inclined portion 210 is the portion of the sealing ring 200 extending out of the lower surface of the cover body 100. It should be supplemented that the inclined portion 210 is an annular conical structure, that is, the portion of the sealing ring 200 extending out of the lower surface of the cover body 100 is inclined inward to form an inclined portion 210 similar to a conical structure; when the lower surface of the inclined portion 210 is in a horizontal state (that is, the lower surface of the inclined portion 210 is at an angle that fits the surface 310 to be sealed), a gap 110 is reserved between the upper surface of the inclined portion 210 and the lower surface of the cover body 100.

[0034] Under normal circumstances, when the sealed box is in a negative pressure environment, the external atmospheric pressure can exert pressure on the box cover so that the box cover seals the box body 300, so the sealing performance can be basically guaranteed when the sealed box is in a negative pressure environment; while when the existing sealed box is in a positive pressure environment, the pressure inside the box will push open the box cover, thereby weakening the sealing performance of the sealed box. Generally, in this case, the sealed box needs to be vented to balance the pressure difference, which is very troublesome and the actual effect is not ideal.

[0035] When the box cover is in use: when the sealing ring 200 of the cover body 100 just contacts the box body 300, the box body 300 is in the contact position, the end of the inclined portion 210 (the annular contact end 211) contacts the sealing surface 310 at the top of the box body 300 to seal the space inside the box body 300, and then the cover body 100 is pressed down and reaches the sealing position. During this process, the volume inside the box body 300 decreases and the air pressure increases (because the box body 300 is sealed, the total amount of gas remains unchanged). When the cover body 100 reaches the sealing position, the inclined portion 210 of the sealing ring 200 is in In the sealed state, the lower surface of the inclined portion 210 is in contact with the sealing surface 310 of the box body 300 and increases the sealing area, while there is a gap 110 between the upper surface of the inclined portion 210 and the lower surface of the cover body 100. At this time, the air pressure in the box body 300 acts in the gap 110, and the air pressure presses the upper surface of the inclined portion 210 downward (at this time, the upper surface of the inclined portion 210 is at an inclined angle), so that the lower surface of the inclined portion 210 is firmly pressed against the sealing surface 310 of the box body 300, so that the sealing ring 200 can better seal the space in the box body 300.

[0036] The specially designed sealing ring 200 allows the sealed box to maintain a sealing effect when the inside is in a positive pressure environment, so the sealed box does not need to be vented after sealing. When the box cover reaches the sealing position from the contact position, the air pressure in the box increases to assist the inclined portion 210 of the sealing ring 200 to seal.

[0037] It should also be noted that when the cover 100 is in the contact position, there is an angle between the lower surface of the inclined portion 210 and the surface to be sealed 310 (that is, only the end of the inclined portion 210 is in contact with the surface to be sealed 310). When the cover 100 moves from the contact position to the sealing position, the end of the inclined portion 210 (the annular contact end 211) is pressed against the surface to be sealed 310, so that the inclined portion 210 is elastically deformed. When the inclined portion 210 is deformed, it moves toward the direction close to the lower surface of the cover 100. At this time, the lower surface of the inclined portion 210 gradually approaches the angle of contact with the surface to be sealed 310. In the example, the lower surface of the inclined portion 210 gradually becomes horizontal, and the upper surface of the inclined portion 210 gradually approaches the lower surface of the cover 100. When the inclined portion 210 is in a sealed state, the lower surface of the inclined portion 210 is basically in contact with the surface to be sealed 310, while the upper surface of the inclined portion 210 is at an inclined angle (i.e., inclined to the surface to be sealed 310 or the lower surface of the box body 300). When the air pressure in the gap 110 acts on the upper surface of the inclined portion 210, it can better exert pressure on the inclined portion 210.

[0038] On the basis of the above embodiment, when the gap 110 is in a positive pressure environment, the inclined portion 210 is subjected to pressure to be pressed toward the surface to be bonded.

[0039] It should be pointed out here that when the box body 300 is in a positive pressure environment, the air pressure inside the box body 300 is higher than the air pressure outside the box body 300, and when the box cover seals the box body 300, a positive pressure environment can be formed inside the box body 300; in addition, when hot food is put into the box body 300 and the box cover is closed, the air inside the box body 300 expands and strengthens the positive pressure environment (i.e., increases the air pressure inside the box body). In the above situation, the sealing ring 200 can achieve an excellent sealing effect through the positive pressure environment through the inclined portion 210.

[0040] like Figure 3 As shown, based on the above embodiment, the shape of the gap 110 is an acute angle. In the example, the cross section of the gap 110 is in a "<" shape, that is, the gap 110 is an annular cavity structure in an angle. The opening of the gap 110 can be connected to the inside of the box body 300. When the gap 110 is in a positive pressure environment, the air pressure acts on the inclined upper surface of the inclined portion 210, thereby better pressurizing the inclined portion 210.

[0041] like Figure 1-3 As shown, based on the above embodiment, the inclined portion 210 is an annular conical surface structure, the end of the inclined portion 210 is an annular contact end 211, and the inner edge surface of the annular contact end 211 is an arc surface structure. The inner edge surface of the annular contact end 211 is an arc surface structure, so it can better contact and fit with the surface to be sealed 310, and when the cover body 100 is in the contact position, it can be sealed to the box body 300 through the inner edge surface of the annular contact end 211.

[0042] like Figure 1-3 As shown, based on the above embodiment, the cross-sectional shape of the inclined portion 210 is conical. When the lower surface of the inclined portion 210 is in contact with the surface to be sealed 310, the upper surface of the inclined portion 210 can be at an inclined angle, thereby reserving an angled gap 110 between the upper surface of the inclined portion 210 and the lower surface of the cover body 100.

[0043] like Figure 1 As shown, based on the above embodiment, the sealing ring 200 further includes a base portion 220, the base portion 220 is connected to the cover body 100, and the inclined portion 210 is integrally connected to the base portion 220. Preferably, a slot 120 is provided on the lower surface of the cover body 100, and the base portion 220 is interference fit with the slot 120.

[0044] like Figure 1-5 As shown, on the basis of the above embodiment, the cover body 100 is provided with two buckle ears 130 , and the two buckle ears 130 are respectively located on two sides of the cover body 100 .

[0045] During the process of the cover body 100 of the box lid moving from the contact position to the sealing position (i.e., the process of the cover body 100 moving from sealing to snapping with the box body 300), the volume change ratio inside the box body 300 is relatively small, and the pressure difference between the inside and outside is also relatively small (i.e., the positive pressure inside the box body 300 is relatively small), so the box lid only needs a relatively small snapping force to achieve the sealing effect of the sealed box. In the present embodiment, sealing can be achieved through only two snap ears 130.

[0046] like Figure 1-5 As shown, a sealed box includes a box cover and a box body 300, wherein the top of the box body 300 has a surface 310 to be sealed; the cover body 100 of the box cover can be in a contact position or a sealing position relative to the box body 300; when the cover body 100 reaches the contact position, the end of the inclined portion 210 of the sealing ring 200 contacts the surface 310 to be sealed and seals the box body 300; when the cover body 100 reaches the sealing position, the inclined portion 210 is in a sealed state, and the lower surface of the inclined portion 210 fits the surface 310 to be sealed.

[0047] The contact position of the cover body 100 is the position where the cover body 100 just contacts the box body 300. It can also be understood as the position of the cover body 100 when the annular abutment end 211 of the inclined portion 210 contacts the surface to be sealed 310. The sealing position of the cover body 100 is the position of the cover body 100 when the sealing ring 200 is in a sealed state. When the cover body 100 is in the sealing position, it can be buckled with the box body 300 through the buckle ears 130.

[0048] When the cover 100 is in the contact position, the annular contact end 211 of the inclined portion 210 seals the surface to be sealed 310. When the cover 100 is pressed down and reaches the sealing position from the contact position, the sealing ring 200 is in a sealed state. At this time, the lower surface of the inclined portion 210 fits with the surface to be sealed 310 to improve the sealing effect. At the same time, the sealing volume in the box body 300 is reduced and the air pressure is increased, so that the box body 300 is in a positive pressure environment. The air pressure in the gap 110 acts on the upper surface of the inclined portion 210 and makes the lower surface of the inclined portion 210 tightly press the surface to be sealed 310. When the cover 100 is in the sealing position, it can be fastened with the box body 300 through two buckle ears 130, so as to achieve a better sealing effect in a positive pressure environment, and there is no need to exhaust the sealed box. The sealing can be achieved only through the two buckle ears 130, which is very convenient.

[0049] like Figure 1-3 As shown, based on the above embodiment, when the cover body 100 reaches the sealing position from the contact position, the air pressure in the box body 300 increases and forms a positive pressure environment so that the gap 110 is in a positive pressure environment.

[0050] In addition, when hot food is put into the box body 300 , the air in the box body 300 expands and a positive pressure environment is formed in the box body 300 .

[0051] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0052] In addition, in the present invention, the descriptions of "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0053] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0055] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A box cover, characterized in that: include: Cover body (100); A sealing ring (200), the sealing ring (200) being connected to the cover body (100), the sealing ring (200) comprising an inwardly inclined inclined portion (210), the inclined portion (210) being capable of elastic deformation and being deformed into a sealing state; When the inclined portion (210) is in a sealed state, a gap (110) exists between the upper surface of the inclined portion (210) and the lower surface of the cover body (100), and the lower surface of the inclined portion (210) is at an angle that can fit with the surface to be sealed (310).

2. A box cover according to claim 1, characterized in that: When the gap (110) is in a positive pressure environment, the inclined portion (210) is subjected to pressure to be pressed toward the surface to be bonded.

3. A box cover according to claim 1 or 2, characterized in that: The gap (110) is in the shape of an acute angle.

4. A box cover according to claim 1, characterized in that: The inclined portion (210) is an annular conical surface structure, the end of the inclined portion (210) is an annular abutment end (211), and the inner edge surface of the annular abutment end (211) is an arc surface structure.

5. A box cover as claimed in claim 3, characterized in that: The cross-sectional shape of the inclined portion (210) is conical.

6. A box cover according to claim 1, characterized in that: The sealing ring (200) further comprises a base portion (220), wherein the base portion (220) is connected to the cover body (100), and the inclined portion (210) is integrally connected to the base portion (220).

7. A box cover according to claim 6, characterized in that: A slot (120) is provided on the lower surface of the cover body (100), and the base portion (220) is interference-fitted with the slot (120).

8. A box cover according to claim 1, characterized in that: The cover body (100) is provided with two buckle ears (130), and the two buckle ears (130) are respectively located on two sides of the cover body (100).

9. A sealed box, characterized in that: The box cover comprises the box cover as claimed in any one of claims 1 to 8, and further comprises a box body (300), wherein the top end of the box body (300) has a surface to be sealed (310); The cover body (100) of the box cover can be in a contact position or a sealing position relative to the box body (300); when the cover body (100) reaches the contact position, the end of the inclined portion (210) of the sealing ring (200) contacts the surface to be sealed (310) and seals the box body (300); when the cover body (100) reaches the sealing position, the inclined portion (210) is in a sealing state, and the lower surface of the inclined portion (210) is in contact with the surface to be sealed (310).

10. A sealed box according to claim 9, characterized in that: When the cover body (100) reaches the sealing position from the contact position, the air pressure in the box body (300) increases and forms a positive pressure environment, so that the gap (110) is in a positive pressure environment.

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