Bucket cover easy to pull open and good in sealing performance and bucket

Abstract

The invention discloses a bucket cover easy to pull open and good in sealing performance and a bucket. The bucket cover comprises a cover body, a first convex ring and a sealing piece. The sealing piece comprises a second convex ring and an inverted cone located on the lower portion of the second convex ring. According to the invention, the second convex ring and the first convex ring are arranged in a vertically staggered manner, so that a thin annular drawing mark can be automatically formed, the annular drawing mark has high structural strength and can bear high impact pressure brought by water in a barrel, the sealing performance of the annular drawing mark is ensured, and water leakage is avoided. Meanwhile, shearing force is formed through staggered arrangement, and the annular drawing marks can be torn off only through small pulling force. In addition, the sealing piece is provided with an inverted cone of a hollow structure, the inverted cone provides a space for inward folding deformation, and the annular drawing mark can be torn off with smaller force. Meanwhile, large water pressure in the barrel can be diffused and divided towards the peripheral conical surface of the inverted cone through the inverted cone and cannot be concentrated on the sealing piece, so that the annular drawing mark is not prone to breakage, and the sealing piece is prevented from leaking water easily.

Description

Technical Field

[0001] The invention relates to the technical field of packaging, and in particular to a bucket cover that is easy to open and has good sealing performance, and a bucket with the bucket cover. Background Art

[0002] At present, the bottle caps or barrel caps with pull rings on the market generally have a structure including a cover body and a pull ring. An opening facing downward is formed in the middle of the cover body, and a circle of connecting platforms in the shape of a circular ring is extended inward from the inner wall of the opening. A sealing sheet is provided on the inner side of the connecting platform, and the sealing sheet is fixedly connected to the connecting platform through a tear mark. It can be understood that the tear mark is a thin-walled structure, and the pull ring and the sealing sheet are an integrally formed structure. When in use, pull the pull ring upward to break the tear mark and separate the sealing sheet from the connecting platform of the cover body. Since the connecting platform of the sealing sheet and the cover body of this type of cover body is horizontally arranged, the width and thickness of the tear mark are relatively large, resulting in the need for greater force in the tearing process. If the production precision is not high, the pull ring may break and the sealing sheet and the connecting platform may not be separated.

[0003] In the prior art, the bottle cap structure generally includes an upper bottle cap and a lower bottle cap. The lower bottle cap includes a tubular cover body and a connecting platform fixed in the cover body. The lower port of the upper bottle cap is threadedly connected to the upper port of the cover body. A conducting hole is provided in the middle of the connecting platform. A sealing tear sheet is provided in the conducting hole. The sealing tear sheet is connected to the conducting hole by an annular pulling mark. A tear ring is connected to the top surface of the sealing tear sheet. When the bottle cap needs to be opened, a large pulling force is required to pull the tear ring with fingers, and the sealing tear sheet cannot be torn open. Excessive force may even cause the tear ring to break. All these will lead to the problem of inconvenient operation of the bottle cap. For this reason, the annular marks of some sealing tear sheets are designed to be relatively thin, so that the sealing tear sheets can be easily torn open. However, due to the relatively thin thickness of the annular marks, when the bucket is transported, some collisions are inevitable, and the water pressure in the bucket will inevitably act on the sealing tear sheet, which can easily break the annular marks, thereby causing the sealing effect of the sealing tear sheet to fail. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a bucket cover that is easy to open and has good sealing performance. The bucket cover can solve the technical problems of being inconvenient to use and difficult to tear off the sealing tear sheet in the past. The application also provides a bucket with the bucket cover.

[0005] In order to solve the above technical problems, the present invention discloses a bucket cover that is easy to open and has good sealing performance, comprising a cover body with an accommodating cavity, a middle portion of the cover body is concave to form a conducting hole, the conducting hole is located in the accommodating cavity, a hole wall of the conducting hole extends inwardly to form a first convex ring, the inner circumference of the first convex ring surrounds to form a water outlet, the first convex ring is sealed and connected to a sealing sheet, and the sealing sheet seals the water outlet;

[0006] The sealing sheet includes a second convex ring and an inverted cone located in the second convex ring, wherein the inverted cone is a conical body with a hollow structure, the bottom surface of the inverted cone is sealedly connected to the inner circumference of the second convex ring, and the top of the inverted cone extends downward and passes through the outside of the water outlet;

[0007] The outer circumference and / or top surface of the second convex ring is sealed and connected to the inner circumference and / or bottom surface of the first convex ring through an annular pull mark; in the vertical direction, the second convex ring is staggered with the first convex ring, and the top surface of the second convex ring is higher than the top surface of the first convex ring; the thickness of the annular pull mark is less than the thickness of the first convex ring and / or the second convex ring;

[0008] A pull ring is provided in the conducting hole, and the pull ring is connected to the second convex ring.

[0009] Wherein, the ratio of the area of ​​the second convex ring to the bottom area of ​​the inverted cone is 1:5 to 1:8.

[0010] Wherein, the taper of the inverted cone is 30 degrees to 60 degrees.

[0011] The top of the inverted cone extends downward and passes through the water outlet; the top of the inverted cone is located in the accommodating cavity of the cover body.

[0012] Wherein, the width of the annular pull mark is a, 0.1mm≥a≥0mm.

[0013] Wherein, the thickness of the annular pull mark is b, 0.4mm≥b≥0.1mm.

[0014] The thickness of the second convex ring 21 is equal to the thickness of the inverted cone and they are integrally injection molded.

[0015] The pull ring is arranged to be inclined upward, a connecting rib is extended from the fixed end of the pull ring toward the second convex ring, the connecting rib is connected to the second convex ring, and a reinforcing portion is extended downward from the free end of the pull ring.

[0016] The second convex ring and the first convex ring are staggered in the vertical direction, and the second convex ring and the first convex ring partially overlap in the vertical direction.

[0017] The present application also provides a bucket, comprising the above-mentioned bucket cover.

[0018] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0019] (1) The second convex ring of the sealing plate and the first convex ring of the cover body are staggered in the vertical direction, so that the connection between the second convex ring and the first convex ring automatically forms an annular mark that is thinner than both the second convex ring and the first convex ring. There is no need to deliberately set a thinning area or cut and process it into a thinning area to form an annular mark as in the prior art. The upper and lower staggered setting of the present application can automatically form an annular mark with a thinner thickness, so that the annular mark of the present application has a strong structural strength and can withstand the large impact pressure brought by the water in the barrel, thereby ensuring the sealing of the annular mark and preventing water leakage. In addition, because the second convex ring and the first convex ring are staggered up and down, a shear force is formed between them. When the second convex ring is pulled upward, only a very small shear force is required between the second convex ring and the first convex ring to tear the annular mark. That is, the annular mark can be torn open by pulling the pull ring with a very small pulling force, so that the annular mark in the bucket cover can be easily torn open while having a strong sealing structure strength, and can withstand a large impact pressure of water in the bucket without breaking.

[0020] (2) The sealing sheet is provided with an inverted cone with a hollow structure. When the pull ring is pulled upward, the inverted cone has space and tendency to fold or deform toward the middle. It can be understood that compared with the existing flat sealing sheet, the inverted cone has less outward tension and provides space for folding and deforming inward. The annular pull mark can be torn open with less force, that is, the sealing sheet can be separated from the cover body with less force, further reducing the force of pulling the pull ring. In addition, the inverted cone can diffuse and divide the high water pressure in the barrel to the surrounding cone surface of the inverted cone at the moment when its cone top touches the water, instead of concentrating on the sealing sheet. In addition, due to the effect on the surrounding cone surface of the inverted cone, the water pressure in the barrel can be dispersed and divided to the surrounding cone surface of the inverted cone. The horizontal partial pressure in the lateral direction will offset each other and will not squeeze the inverted cone to deform it inward, nor will it tear the annular mark. Only the vertical partial pressure acts on the inverted cone. Therefore, the pressure acting on the inverted cone is much reduced. Combined with the fact that the inverted cone protrudes downward, when the upward water pressure acts on the inverted cone, the inverted cone is not easy to deform upward. This also enables the inverted cone to withstand a larger liquid pressure in the barrel, and then the annular mark can withstand a larger liquid pressure in the barrel. Even if the bucket is shaken or collided, it will generate a large water pressure, but it will not tear the annular mark, making it difficult to break, thereby avoiding easy water leakage of the sealing piece.

[0021] (3) The bucket using the bucket cover of the present application is more convenient and labor-saving during opening, is simple and easy to operate, and has good sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a structural schematic diagram of a water bucket cover in an embodiment;

[0024] Figure 2 is a cross-sectional view of a bucket cover in an embodiment;

[0025] Figure 3 is a schematic diagram of a structure in which the second convex ring and the first convex ring are staggered up and down in the vertical direction in the embodiment;

[0026] Figure 4 is a schematic diagram of a structure in which the second convex ring and the first convex ring are staggered up and down in the vertical direction in some embodiments;

[0027] Figure 5 is a schematic diagram of a structure in which the second convex ring and the first convex ring are staggered in both the vertical direction and the horizontal direction in some embodiments;

[0028] Figure 6 It is a schematic diagram of the structure in which the second convex ring and the first convex ring are staggered in both the vertical direction and the horizontal direction in some embodiments. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] The terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, device, product or end including a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units inherent to these processes, methods, products or ends.

[0031] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0032] The present invention discloses a specific embodiment of a bucket cover that is easy to open and has good sealing performance. Figure 1 to Figure 2 The bucket cover includes a cover body 1 and a sealing sheet 2. A conducting hole 12 is formed in the middle of the cover body 1 along the height direction. The hole wall of the conducting hole 12 extends a first annular convex ring 11 inwardly from the bottom. The sealing sheet 2 is connected to the first convex ring 11 to seal the conducting hole 12. A pull ring 4 is arranged upwardly and obliquely relative to the first convex ring 11 above the sealing sheet 2. The pull ring 4 is located in the conducting hole 12. A connecting rib 41 extends from the fixed end of the pull ring 4 toward the sealing sheet 2. The connecting rib 41 is integrally formed with the sealing sheet 2. A reinforcing portion 42 extends downwardly from the free end of the pull ring 4. By providing the reinforcing portion 42, on the one hand, the structural strength of the pull ring 4 is increased, and it is not easy to break. On the other hand, the contact area between the finger and the free end of the pull ring 4 is increased to avoid finger injury or pain, and the pulling process is more convenient and labor-saving. Optionally, the shape of the reinforcing portion 42 is one of a fan, a triangle, a rectangle, and a polygon.

[0033] In this embodiment, the aperture of the conducting hole 12 is gradually reduced from the upper part to the middle part, so that the upper part of the conducting hole 12 forms an inclined surface inclined obliquely outward, that is, the upper part of the conducting hole 12 is expanded, and the free end of the pull ring 4 is located at the upper part of the conducting hole 12, which is convenient for fingers to insert the pull ring 4 and pull the pull ring 4 obliquely upward. The upper part of the expanded conducting hole 12 provides sufficient moving space for the displacement of the pull ring 4; the aperture of the middle part of the conducting hole 12 is equal to the aperture of the lower part of the conducting hole 12. This structure can play a guiding role. When the water bucket is installed on other pumping equipment such as a water dispenser, the water inlet pipe of other pumping equipment such as the water dispenser can be smoothly inserted into the conducting hole 12, thereby making the installation of the water bucket more convenient and quick, and the operation simpler.

[0034] In this embodiment, see Figure 2 As shown, the middle part of the first convex ring 11 is a water outlet, and the outer peripheral surface of the sealing sheet 2 is sealedly connected to the inner peripheral surface of the first convex ring 11, so as to seal the water outlet. The sealing sheet 2 includes a second convex ring 21 and an inverted cone 22 located in the second convex ring 21, and the inverted cone 22 extends downward and extends out of the water outlet. The outer peripheral edge of the inverted cone 22 is connected to the inner peripheral edge of the second convex ring 21. In this embodiment, in order to enhance the structural strength of the sealing sheet 2 and facilitate the molding of the sealing sheet 2, the inverted cone 22 is integrally formed with the second convex ring 21.

[0035] The bottom of the outer circumference of the second convex ring 21 is sealed and connected to the top of the inner circumference of the first convex ring 11 through the annular mark 3, so that the bottom surface of the second convex ring 21 is higher than the bottom surface of the first convex ring 11 in the vertical height direction, and the top surface of the second convex ring 21 is higher than the top surface of the first convex ring 11 in the vertical height direction, that is, the second convex ring 21 and the first convex ring 11 are staggered in the vertical direction, so that the connection between the second convex ring 21 and the first convex ring 11 automatically forms an annular mark 3 with a thickness relatively thinner than the second convex ring 21 and the first convex ring 11. Because the second convex ring 21 and the first convex ring 11 are staggered in the vertical direction, there is no need to deliberately set a thinning area or cut and process it into a thinning area to form the annular mark 3, and the annular mark 3 with a thinner thickness can be automatically formed by the upper and lower staggered setting. The annular pull mark 3 of the present application has a strong structural strength, can withstand the greater impact pressure brought by the water in the barrel, ensure the sealing of the annular pull mark 3, and will not leak. In addition, because the second convex ring 21 and the first convex ring 11 are staggered in the vertical direction, when the second convex ring 21 is pulled upward, only a very small shear tension is required between the second convex ring 21 and the first convex ring 11 to tear the annular pull mark 3, that is, the pull ring 4 is pulled upward obliquely with a very small tension to tear the annular pull mark 3, so that the annular pull mark 3 in the bucket cover can be easily torn while having a strong sealing structural strength, and can withstand the greater impact pressure of the water in the barrel without breaking.

[0036] Further, such as Figure 3 As shown, the width of the annular mark 3 is a, 0.1mm≥a≥0mm, which can be understood as the horizontal distance between the inner ring surface of the first convex ring 11 and the outer ring surface of the second boss 21. The thickness of the annular mark 3 is b, 0.4mm≥b≥0.1mm, which can be understood as the vertical distance between the top end surface of the first convex ring 11 and the bottom end surface of the second convex ring 21. Within the above-mentioned design parameter range, in order to ensure that the annular mark 3 has sufficient structural strength to achieve sealing, and to reduce the force of the annular mark 3 being torn as much as possible, when the width of the annular mark 3 is designed to be a smaller value, its thickness needs to be designed to be a larger value, and when the width of the annular mark 3 is designed to be a larger value, its thickness needs to be designed to be a smaller value, so that the annular mark 3 can achieve a balance between sealing and easy tearing. Preferably, when the width of the annular pull mark 3 is 0.05 mm and the thickness of the annular pull mark 3 is 0.3 mm, the balance between the sealing property and the easy tearing property of the annular pull mark 3 is optimal.

[0037] In this embodiment, if Figure 3 and Figure 4As shown, the second convex ring 21 and the first convex ring 11 are staggered in the vertical direction, and partially overlap in the vertical direction. The thickness of the annular pull mark 3 is the height of the upper and lower overlap. Figure 3 In the embodiment, the width of the annular pull mark 3 is the horizontal distance between the inner annular surface of the first convex ring 11 and the outer annular surface of the second boss 21. Figure 4 In the figure, the width of the annular pull mark 3 is 0, that is, the inner annular surface of the first convex ring 11 and the outer annular surface of the second boss 21 are in the same vertical plane.

[0038] In some embodiments, Figure 5 and Figure 6 As shown, the second convex ring 21 and the first convex ring 11 can also be arranged to be staggered in the vertical direction and not overlapped in the vertical direction. That is, the bottom surface of the second convex ring 21 is located above the top surface of the first convex ring 11, or the bottom surface of the second convex ring 21 is flush with the top surface of the first convex ring 11.

[0039] When the bottom surface of the second convex ring 21 is located above the top surface of the first convex ring 11, the width and thickness of the annular mark 3 can also adopt the above-mentioned values, which can also ensure that the annular mark 3 has sufficient structural strength to achieve sealing while minimizing the force of tearing the annular mark 3 as much as possible, thereby improving the ease of pulling and operability.

[0040] When the bottom surface of the second convex ring 21 is flush with the top surface of the first convex ring 11, the width and thickness of the annular mark 3 can also adopt the above values, which can also ensure that the annular mark 3 has sufficient structural strength to achieve sealing, and also reduce the force of tearing the annular mark 3 as much as possible, thereby improving the ease of pulling and operation. However, in this case, the thickness of the annular mark 3 is the thickness value extending downward from the bottom surface of the second convex ring 21, and / or the thickness value extending upward from the top surface of the first convex ring 11.

[0041] In some embodiments, Figure 5 As shown, when the bottom surface of the second convex ring 21 is located above the top surface of the first convex ring 11, and in the horizontal direction, the second convex ring 21 overlaps with the first convex ring 11, that is, the bottom surface of the second convex ring 21 overlaps with the top surface of the first convex ring 11 in the horizontal direction. At this time, the width and thickness of the annular pull mark 3 can also adopt the above values, which can also ensure that the annular pull mark 3 has sufficient structural strength to achieve sealing, and also reduce the force of tearing the annular pull mark 3 as much as possible, thereby improving the ease of pulling and operability.

[0042] In this embodiment, the connecting rib 41 is connected to the second protruding ring 21, and the pull ring 4 pulls the second protruding ring 21 through the connecting rib 41. In some embodiments, the connecting rib 41 may not be provided, and the fixed end of the pull ring 4 is directly connected to the upper top surface of the second protruding ring 21.

[0043] It should be noted that the sealing sheet 2, the annular pull mark 3, the pull ring 4 and the cover body 1 can be an integrally formed structure. In other embodiments, the sealing sheet 2 can also be fixedly connected to the cover body 1 by ultrasonic welding or the like.

[0044] In this embodiment, see Figure 2 As shown, the inverted cone 22 is a hollow structure, which provides a deformation space for the tearing deformation of the sealing sheet 2 when the sealing sheet 2 needs to be torn off, so as to facilitate the tearing off of the sealing sheet 2. The thickness of the inverted cone 22 and the second convex ring 21 is consistent, which is convenient for injection molding. Of course, in some embodiments, the thickness of the inverted cone 22 and the second convex ring 21 can be different.

[0045] The apex of the inverted cone 22 extends downward through the water outlet of the first convex ring 11, and the apex of the inverted cone 22 cannot extend to the plane where the bottom surface of the cover body 1 is located, that is, the apex of the inverted cone 22 must be located in the cavity of the cover body 1 to protect the apex of the inverted cone 22.

[0046] In the present application, a hollow inverted cone 22 is provided in the middle of the sealing sheet 2. One of its functions is to facilitate the uniformity of the glue during the injection molding of the entire bottle cap, because the sealing sheet 2, the annular mark 3, the pull ring 4 and the cover body 1 are all integrally injection-molded structures, and the glue injection point is at the cone vertex of the inverted cone 22. The second function is that when the pull ring 4 is pulled upward, the pull ring 4 drives the second convex ring 21 to deform so as to tear the annular mark 3. Because the inverted cone 22 has space and tendency to fold or deform toward the middle, it can be understood that the inverted cone 22 of the present application has less outward tension than the existing flat sealing sheet, and provides space for inward folding and deformation, so that the annular mark 3 can be torn with less force. Combined with the vertical staggered arrangement of the second convex ring 21 and the first convex ring 11, the annular pull mark 3 that can be easily torn apart with only a small shearing force is formed. The design of the inverted cone 22 further enhances the technical effect of easy separation of the sealing sheet 2 and the cover body 1, that is, further reduces the force of the pull ring 4 to pull the sealing sheet 2 apart. The third function is that when the water in the barrel shakes, for the existing flat sealing sheet, the water pressure will all act on the flat sealing sheet, and the flat sealing sheet will be subjected to greater pressure and tear the light and weak pull mark of the structure, thereby causing the flat sealing sheet to leak. The inverted cone 22 of the present application can diffuse and distribute the large water pressure to the surrounding cone surface of the inverted cone 22 at the moment when its cone top touches the water, and will not be concentrated on the sealing sheet 2. Moreover, due to the pressure acting on the surrounding cone surface of the inverted cone 22, its lateral horizontal partial pressure will offset each other, and will not squeeze the inverted cone 22 to deform it inward, and will not tear the annular mark 3. Only its vertical partial pressure acts on the inverted cone 22. Therefore, the pressure acting on the inverted cone 22 is greatly reduced. Combined with the fact that the inverted cone 22 protrudes downward, when the upward water pressure acts on the inverted cone 22, the inverted cone 22 is not easy to deform upward. This also enables the inverted cone 22 to withstand a larger liquid pressure in the barrel, and then the annular mark 3 can withstand a larger liquid pressure in the barrel. Even if a large water pressure is generated when the bucket is shaken or collided, the annular mark 3 will not be torn, making it difficult for the annular mark to break, thereby avoiding easy water leakage of the sealing sheet 2.

[0047] Furthermore, on the sealing sheet 2, the ratio of the bottom area of ​​the second convex ring 21 and the inverted cone 22 is 1:5 to 1:8, so that the sealing sheet 2 can withstand the large water pressure in the barrel without leaking, and can use a smaller force to pull the sealing sheet 2 open, which also achieves the sealing sheet 2 to have both easy opening and good sealing. In addition, the setting of the second convex ring 21 can realize the second convex ring 21 and the first convex ring 11 to form a shear force on two vertical planes, so that when the pull ring 4 is pulled, only a small force is needed to act on the second convex ring 21 to tear the annular pull mark 3, and combined with the large area of ​​the inverted cone 22 that can be deformed inward, the second convex ring 21 is easily separated from the first convex ring 11. The larger the bottom area of ​​the inverted cone 22, the smaller the pressure in the barrel acting on the sealing sheet 2, but considering the easy tearing of the sealing sheet 2, it is necessary to set the second convex ring 21 that cooperates with the inverted cone 22.

[0048] Furthermore, the taper of the inverted cone 22 is 30 to 60 degrees, and the top of the inverted cone 22 extends downward and as far away from the first convex ring 11 as possible. Of course, the smaller the taper of the inverted cone 22, the smaller its vertical partial pressure, that is, it can withstand a greater water pressure in the barrel, but when the bottom area of ​​the inverted cone 22 is constant, the smaller the taper, the higher its height. In order to ensure that the top of the inverted cone 22 is in the cavity in the cover body, the taper of the inverted cone 22 is set to 45 degrees for best.

[0049] In this embodiment, the thickness of the second convex ring 21 may be equal to or unequal to the thickness of the inverted cone 22, and the thickness of the first convex ring 11 may be equal to or unequal to the thickness of the second convex ring 21, which can be selectively set according to actual needs.

[0050] The present invention discloses a water bucket, which comprises the water bucket cover. The water bucket using the water bucket cover of the present embodiment is more convenient and labor-saving during opening, is easy to operate, and has good sealing performance.

[0051] Finally, it should be noted that the bucket cover and bucket that are easy to open and have good sealing performance disclosed in the embodiments of the present invention only disclose preferred embodiments of the present invention, which are only used to illustrate the technical solution of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bucket cover that is easy to open and has good sealing performance, characterized in that: The invention comprises a cover body with an accommodating cavity, wherein the middle part of the cover body is concave to form a conducting hole, the conducting hole is located in the accommodating cavity, a first convex ring is extended inward from the hole wall of the conducting hole, the inner circumference of the first convex ring surrounds the water outlet hole, the first convex ring is sealed and connected with a sealing sheet, and the sealing sheet seals the water outlet hole; The sealing sheet comprises a second convex ring and an inverted cone located in the second convex ring, wherein the inverted cone is a conical body with a hollow structure, and the cone bottom surface of the inverted cone is sealingly connected to the inner circumferential surface of the second convex ring; The outer circumference and / or top surface of the second convex ring is sealed and connected to the inner circumference and / or bottom surface of the first convex ring through an annular pull mark; in the vertical direction, the second convex ring is staggered with the first convex ring, and the top surface of the second convex ring is higher than the top surface of the first convex ring; the thickness of the annular pull mark is less than the thickness of the first convex ring and / or the second convex ring; A pull ring is provided in the conducting hole, and the pull ring is connected to the second convex ring.

2. The bucket cover that is easy to open and has good sealing performance according to claim 1, characterized in that: The ratio of the area of ​​the second convex ring to the bottom area of ​​the inverted cone is 1:5 to 1:

8.

3. A bucket cover that is easy to open and has good sealing performance according to claim 1 or 2, characterized in that: The taper of the inverted cone is 30 degrees to 60 degrees.

4. A bucket cover that is easy to open and has good sealing performance according to claim 1 or 2, characterized in that: The top of the inverted cone extends downward and passes through the water outlet; the top of the inverted cone is located in the accommodating cavity of the cover body.

5. The bucket cover that is easy to open and has good sealing performance according to claim 1, characterized in that: The width of the annular pull mark is a, 0.1mm≥a≥0mm.

6. The bucket cover that is easy to open and has good sealing performance according to claim 1 or 5, characterized in that: The thickness of the annular tensile mark is b, 0.4 mm ≥ b ≥ 0.1 mm.

7. The bucket cover that is easy to open and has good sealing performance according to claim 1, characterized in that: The thickness of the second convex ring 21 is equal to that of the inverted cone and the second convex ring 21 is integrally injection molded.

8. The bucket cover that is easy to open and has good sealing performance according to claim 1, characterized in that: The pull ring is arranged obliquely upward, a connecting rib is extended from a fixed end of the pull ring toward the second convex ring, the connecting rib is connected to the second convex ring, and a reinforcing portion is extended downward from a free end of the pull ring.

9. The bucket cover that is easy to open and has good sealing performance according to claim 1, characterized in that: The second convex ring and the first convex ring are staggered in the vertical direction, and the second convex ring and the first convex ring partially overlap in the vertical direction.

10. A bucket, characterized in that: include: A bucket cover as claimed in any one of claims 1 to 9.

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