Urinal

Abstract

The urinal comprises a urinal body and a splash-proof protrusion located in the urinal body, the urinal body is provided with a cavity and an opening communicated with the cavity, and the splash-proof protrusion is located in the cavity and protrudes towards the opening from the inner wall of the urinal body; the splash-proof protrusion comprises a flow guide face facing the opening, the urinal has the vertical direction, the horizontal direction and the inside-outside direction which are perpendicular to one another, the flow guide face is obliquely arranged relative to the vertical direction, the horizontal direction and the inside-outside direction, and the top and the bottom of the flow guide face are projected in the same horizontal plane. The projection of the top of the flow guide face is located on the inner side of the projection of the bottom of the flow guide face in the inside-outside direction. The flow guide face can receive urine, so that the falling height of the urine in the air is reduced, splashing of the urine is reduced, the flow guide face can receive the urine in the inside-outside direction and the vertical direction, and a user can make the urine make contact with the flow guide face conveniently in the using process.

Description

Technical Field

[0001] The invention relates to the technical field of bathroom products, in particular to a urinal. Background Art

[0002] Urinals are a type of urinary facility used in bathrooms. They are widely used in public places such as stations and shopping malls. Men usually use urinals to urinate. Compared with toilets and squat toilets, urinals are more convenient to use and have a single function. They are used more and more frequently. However, existing urinals usually do not have a splash-proof function. During use, urine may splash when it contacts the urinal, causing droplets to splash out of the urinal and fall on the ground or the user, causing unsanitary problems. Summary of the invention

[0003] In view of this, the present invention provides a urinal to solve the problem of urine splashing during use of the existing urinal.

[0004] The present application provides a urinal, comprising a urinal body and a splash-proof protrusion located in the urinal body, wherein the urinal body is provided with a cavity and an opening connected to the cavity, and the splash-proof protrusion is located in the cavity and protrudes from the inner wall of the urinal body toward the opening;

[0005] The splash-proof protrusion includes a guide surface facing the opening, the urinal has a vertical direction, a horizontal direction, and an inner-outer direction that are perpendicular to each other, the guide surface is inclined relative to the vertical direction, the horizontal direction, and the inner-outer direction, the top and bottom of the guide surface are projections in the same horizontal plane, and the projection of the top of the guide surface is located on the inner side of the projection of the bottom of the guide surface in the inner-outer direction.

[0006] In some embodiments, along the same length in the vertical direction, the area of ​​the top of the guide surface is smaller than the area of ​​the bottom of the guide surface.

[0007] In some embodiments, the guide surface includes a first edge and a second edge extending along the vertical direction, the second edge is closer to the opening in the inner and outer directions relative to the first edge, and the distance between the first edge and the second edge gradually increases from top to bottom in the vertical direction.

[0008] In some embodiments, the guide surface includes a first edge and a second edge extending along the vertical direction, the second edge being closer to the opening in the inner and outer directions relative to the first edge, the first edge extending outward at a first curvature at the top of the guide surface relative to the second edge, and extending inward at a second curvature at the bottom of the guide surface, and the first curvature is smaller than the second curvature.

[0009] In some embodiments, the anti-splash protrusion is provided with guide surfaces on both sides of the horizontal direction, and the two guide surfaces extend outward from top to bottom in the vertical direction.

[0010] In some embodiments, each of the guide surfaces includes a first edge and a second edge extending along the vertical direction, the first edge is connected to the inner wall of the toilet body, the second edge is connected between two ends of the first edge, and the second edges of the two guide surfaces overlap.

[0011] In some embodiments, the first edge includes a vertical segment extending along the vertical direction and a horizontal segment located in a horizontal plane, one end of the vertical segment intersects with one end of the second edge, and both ends of the horizontal segment intersect with the vertical segment and the other end of the second edge respectively.

[0012] In some embodiments, the cross-sectional area of ​​the splash-proof protrusion gradually increases from top to bottom in the vertical direction.

[0013] In some embodiments, the bottom of the opening is higher than the bottom of the cavity, so that the toilet body forms a step between the bottom of the opening and the bottom of the cavity.

[0014] In some embodiments, two pedals are provided in the cavity, the pedals are located between the anti-splash protrusion and the opening, and the two pedals are spaced apart along the horizontal direction; and / or

[0015] The toilet body comprises a bottom wall and a surrounding wall which is arranged with the bottom wall to form the cavity, the surrounding wall is hemispherical, the opening is arranged on one side of the surrounding wall, and the contour line of the opening extends along an arc track in the vertical direction.

[0016] The urinal provided by the present invention has a splash-proof protrusion arranged inside the urinal body, and the splash-proof protrusion includes a guide surface facing the opening. During use by the user, the guide surface can receive urine to reduce the height of the urine falling in the air, thereby reducing the gravitational potential energy of the urine, and further reducing the splashing of the urine. Moreover, since urine moves in the air in a parabolic trajectory, displacement occurs in both the inner and outer directions and the vertical direction. The present invention makes the guide surface inclined relative to the vertical direction, the horizontal direction and the inner and outer directions, and the projection of the top of the guide surface is inclined relative to the vertical direction, the horizontal direction and the inner and outer directions. The projection is located on the inner side of the projection of the bottom of the guide surface in the inner and outer directions, so that the guide surface can receive urine in the inner and outer directions as well as in the vertical direction, which is convenient for users to make urine contact with the guide surface during use, thereby improving the splash-proof effect of the splash-proof protrusion, and when urine contacts the guide surface, the guide surface and the falling path of urine form an obtuse angle, so as to reduce the splashing caused by the impact when the urine contacts the splash-proof protrusion, thereby forming a better splash-proof effect, and after the urine contacts the guide surface, it is located above the guide surface, so that the urine slides down from top to bottom along the guide surface under the action of gravity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of a urinal provided in one embodiment of the present invention;

[0018] Figure 2 for Figure 1 A front view of the urinal shown in;

[0019] Figure 3 for Figure 1 A top view of a cross section of the urinal shown in ;

[0020] Figure 4 for Figure 1 A longitudinal section diagram of the urinal shown in;

[0021] Figure 5 for Figure 1 A perspective view of the urinal shown in another perspective.

[0022] In the figure: 10, urinal; 12, urinal body; 14, splash-proof protrusion; 16, cavity; 18, opening; 20, footrest; 22, guide surface; 24, first edge; 26, second edge; 28, vertical section; 30, horizontal section; 32, step; 34, bottom wall; 36, surrounding wall. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0024] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, inside, outside, top, bottom...) are only used to explain the relative position relationship 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.

[0025] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, the element may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0026] See also Figures 1 to 5 A urinal 10 provided in one embodiment of the present invention includes a toilet body 12 and a splash-proof protrusion 14 located in the toilet body 12. The toilet body 12 is provided with a cavity 16 and an opening 18 connected to the cavity 16. The splash-proof protrusion 14 is located in the cavity 16 and protrudes from the inner wall of the toilet body 12 toward the opening 18. When the user urinates, the splash-proof protrusion 14 can receive urine to reduce the height of the urine falling in the air, thereby reducing the gravitational potential energy of the urine, thereby reducing the splashing of urine, and reducing the risk of urine splashing outside the urinal 10 or splashing on the user.

[0027] It is understandable that the user can stand outside the urinal 10, and the urine can enter the cavity 16 through the opening 18 and contact the anti-splash protrusion 14, or the user can enter the cavity 16 of the urinal body 12 through the opening 18 and stand in the cavity 16 to use it. In the present application, two footrests 20 are provided in the cavity 16, and the two footrests 20 are located between the anti-splash protrusion 14 and the opening 18. The two footrests 20 are arranged at intervals along the horizontal direction Y. The user enters the cavity 16 through the opening 18, and the two feet stand on the two footrests 20 respectively, so that the person is in the cavity 16 as a whole, reducing the risk of urine leakage. At the same time, the footrest 20 can make the user's soles be separated from the bottom surface of the cavity 16 by a certain distance to prevent the soles from being contaminated. Preferably, the height of the footrest 20 should not be too high to prevent instability caused by the height being too high.

[0028] The specific size of the footrest portion 20 is not limited and can be set as needed. For example, it can be set to an area slightly smaller than the soles of most people's shoes. When a person stands on the footrest portion 20, the soles of the shoes basically cover the footrest portion 20, reducing the risk of the footrest portion 20 being contaminated. Alternatively, it can be set to an area slightly larger than the soles of most people's shoes, so that a person can stand more stably on the footrest portion 20.

[0029] The specific shape of the pedal portion 20 is not limited, and it can be a long strip, or a shape similar to the sole of the foot, etc., and the pedal portion 20 can be a complete block structure, or it can be composed of multiple non-continuous point or strip structures arranged together. While ensuring standing stability, the contact area between the sole and the pedal portion 20 is reduced, reducing the risk of mutual contamination.

[0030] In one embodiment, the splash-proof protrusion 14 and the toilet bowl body 12 are integrally formed to ensure the connection strength between the splash-proof protrusion 14 and the toilet bowl body 12, eliminating the assembly process, and also avoiding the problem of urine being trapped in a gap between the splash-proof protrusion 14 and the toilet bowl body 12 due to assembly.

[0031] The splash-proof protrusion 14 includes a guide surface 22, which faces the opening 18 of the toilet body 12 to receive urine and reduce the height of the urine falling. The guide surface 22 is inclined to guide the urine and reduce the splashing of urine.

[0032] The urinal 10 has a vertical direction Z, a horizontal direction Y, and an inner-outer direction X that are perpendicular to each other. The guide surface 22 is arranged at an inclination relative to the vertical direction Z, the horizontal direction Y, and the inner-outer direction X. The top of the guide surface 22 and the bottom of the guide surface 22 are projected on the same horizontal plane, that is, the plane where the horizontal direction Y and the inner-outer direction X are located. The projection of the top of the guide surface 22 is located on the inner side of the projection of the bottom of the guide surface 22 in the inner-outer direction X. When the user is in use, the user is on the outer side of the splash-proof protrusion 14, that is, standing on the inner-outer direction X. The user is on the outer side of the splash-proof protrusion 14. After the urine is discharged, it moves in the air in a parabolic trajectory, so displacement occurs in the inner-outer direction X and the vertical direction Z. Since the guide surface 22 is arranged at an inclination in the vertical direction Z, the horizontal direction Y, and the inner-outer direction X, the guide surface 22 can receive urine in both the inner-outer direction X and the vertical direction Z. That is, the guide surface 22 is inclined relative to the vertical direction Z, so that the guide surface 22 is perpendicular to the vertical direction Z. The plane of the vertical direction Z and the plane of the horizontal direction Y and the inner and outer directions X form an inclined effect, so the guide surface 22 can receive urine in the vertical direction Z, and the guide surface 22 is inclined relative to the inner and outer directions X, so that the guide surface 22 forms an inclined effect with the plane perpendicular to the inner and outer directions X and the plane of the horizontal direction Y and the vertical direction Z, so the guide surface 22 can receive urine in the inner and outer directions X, and the guide surface 22 can receive urine in different directions, which makes it easier for urine to contact the guide surface 22, so as to enhance the splash-proof effect of the splash-proof protrusion 14.

[0033] At the same time, the projection of the top of the guide surface 22 is located on the inner side of the projection of the bottom of the guide surface 22, so that the guide surface 22 forms an effect of extending obliquely from top to bottom toward the outside of the inner and outer directions X, and the guide surface 22 is inclined relative to the horizontal direction Y, that is, the guide surface 22 forms an inclined effect with the plane perpendicular to the horizontal direction Y and the plane where the vertical direction Z and the inner and outer directions X are located, so that when the guide surface 22 receives urine in the inner and outer directions X or the vertical direction Z, the guide surface 22 and the falling path of the urine can form an obtuse angle to reduce the splashing caused by the impact when the urine contacts the splash-proof protrusion 14, forming a better splash-proof effect, and the urine is located above the guide surface 22, so that the urine slides down from top to bottom along the guide surface 22 under the action of gravity, avoiding the problem of splashing caused by the urine being below the guide surface 22 and dripping directly from the guide surface 22.

[0034] The vertical direction Z, the horizontal direction Y, and the inner and outer directions X are perpendicular to each other to form a three-dimensional coordinate system. Figure 2 Taking the example for explanation, the vertical direction Z is the length direction of the paper, including the upward and downward directions; the horizontal direction Y is the width direction of the paper, including the left and right directions; the inward and outward direction X is the direction perpendicular to the paper, including the inward and outward directions.

[0035] The guide surface 22 is a concave curved surface. The design of the curved surface can make urine quickly diffuse to the surrounding when it contacts the guide surface 22, reduce the impact force when urine contacts the guide surface 22, and thus reduce the splashing caused by the impact when urine contacts the guide surface 22. Preferably, the guide surface 22 is concave at a small angle to prevent the guide surface 22 from receiving urine due to an excessively large concave angle.

[0036] In one embodiment, along the same length in the vertical direction Z, the area of ​​the top of the guide surface 22 is smaller than the area of ​​the bottom of the guide surface 22, that is, under the premise that the top of the guide surface 22 and the bottom of the guide surface 22 are the same length, the area of ​​the top of the guide surface 22 is smaller than the area of ​​the bottom, so that the guide surface 22 forms a shape that is small at the top and large at the bottom. Since urine falls in a parabolic trajectory, the probability of the bottom of the guide surface 22 receiving urine is relatively large, while the probability of the top receiving urine is relatively small. The guide surface 22 forms a shape that is small at the top and large at the bottom, which can achieve the effect of taking into account both receiving urine and reducing the area, and is conducive to reducing the volume of the splash-proof protrusion 14 without affecting the splash-proof function of the splash-proof protrusion 14, thereby reducing the space occupied by the splash-proof protrusion 14 in the cavity 16.

[0037] The guide surface 22 includes a first edge 24 and a second edge 26 extending along the vertical direction Z. The second edge 26 is closer to the opening 18 in the inner-outer direction X than the first edge 24, that is, the second edge 26 is located on the outside of the first edge 24 in the inner-outer direction X. The distance between the first edge 24 and the second edge 26 gradually increases from top to bottom in the vertical direction Z, so that the area of ​​the guide surface 22 gradually increases from top to bottom, so that the guide surface 22 forms a shape that is small at the top and large at the bottom and gradually increases.

[0038] In this embodiment, the first edge 24 contacts the inner wall of the toilet body 12 , that is, the portion where the guide surface 22 contacts the inner wall of the toilet body 12 forms the first edge 24 , and the second edge 26 is connected between two ends of the first edge 24 .

[0039] It should be noted that the first edge 24 and the second edge 26 extend along the vertical direction Z, which means that the first edge 24 and the second edge 26 at least partially extend in the vertical direction Z, and does not limit the first edge 24 and the second edge 26 to extend entirely in the vertical direction Z.

[0040] Specifically, the cross-sectional area of ​​the splash-proof protrusion 14 is perpendicular to the cross-sectional area of ​​the vertical direction Z and gradually increases from top to bottom along the vertical direction Z, so that the splash-proof protrusion 14 as a whole has a small top and large bottom structure, thereby forming a guide surface 22 that is small top and large bottom on its surface, which is beneficial to reducing the overall volume of the splash-proof protrusion 14 without affecting the cavity 16 for receiving urine of the splash-proof protrusion 14, thereby reducing the space occupied by the splash-proof protrusion 14 in the cavity 16.

[0041] In this embodiment, the first edge 24 is a curve, and the first edge 24 extends outwardly with a first curvature at the top of the guide surface 22 relative to the second edge 26, and extends inwardly with a second curvature at the bottom of the guide surface 22, and the first curvature is smaller than the second curvature. From top to bottom, the first edge 24 first extends in a direction away from the second edge 26 with a first curvature, and then extends in a direction close to the second edge 26 with a second curvature, and finally the two ends of the first edge 24 intersect with the two ends of the second edge 26 respectively, so that the area of ​​the guide surface 22 at the bottom is larger than that at the top, forming a shape that is small at the top and large at the bottom.

[0042] It should be noted that in the embodiment of the present application, the first edge 24 and the second edge 26 refer to the contour lines of the guiding surface 22, which are introduced to more accurately describe the shape of the guiding surface 22, and do not refer to the shape lines visually visible on the surface of the product. In actual application, the surface of the guiding surface 22 is an arc-shaped curved surface as a whole, and smoothly transitions with the inner wall of the toilet body 12, and no obvious contour lines can be seen visually, but it can also be formed into a curved surface shape with obvious edges so that the shape lines of the first edge 24 and the second edge 26 can be visually seen on the product.

[0043] In one embodiment, the splash-proof protrusion 14 is provided with guide surfaces 22 on both sides in the horizontal direction Y, and the two guide surfaces 22 extend outward from top to bottom in the vertical direction Z. The two guide surfaces 22 can receive urine, which can increase the area of ​​the splash-proof protrusion 14 that receives urine and enhance the splash-proof effect of the splash-proof protrusion 14.

[0044] Specifically, the two splash-proof protrusions 14 are symmetrically arranged to enhance the overall appearance of the splash-proof protrusions 14 .

[0045] Each guide surface 22 includes a first edge 24 and a second edge 26 extending along the vertical direction Z. The first edge 24 is connected to the inner wall of the toilet body 12, and the second edge 26 is connected between the two ends of the first edge 24. The second edges 26 of the two guide surfaces 22 overlap to prevent urine from contacting the non-guiding position between the two guide surfaces 22 and affecting the splash-proof effect of the splash-proof protrusion 14.

[0046] It can be understood that the splash-proof protrusion 14 formed at the junction of the two guide surfaces 22 can be a sharp edge or a smooth edge.

[0047] In this embodiment, the splash-proof protrusion 14 is integrally formed with the toilet bowl body 12, and the two guide surfaces 22 of the splash-proof protrusion 14 constitute the outer surface of the splash-proof protrusion 14, that is, the surface that is not in contact with the toilet bowl body 12, so that when the user is in use, as long as the urine contacts the splash-proof protrusion 14, it contacts the guide surface 22, thereby achieving a splash-proof effect.

[0048] The first edge 24 includes a vertical section 28 extending along the vertical direction Z and a horizontal section 30 located in a horizontal plane, that is, in a plane where the horizontal direction Y and the inner and outer directions X are located. The top of the vertical section 28 intersects with the top of the second edge 26, and the bottom of the vertical section 28 and the bottom of the second edge 26 intersect with both ends of the horizontal section 30 respectively, so that the guide surface 22 as a whole forms a triangle-like shape, forming the characteristics of being small at the top and large at the bottom.

[0049] Specifically, the vertical section 28 and the horizontal section 30 are both arc-shaped, that is, the vertical section 28 and the horizontal section 30 are curves, and the second edge 26 is an arc-shaped inward concave, forming a C-shaped curve to increase the distance between the splash-proof protrusion 14 and the user.

[0050] In one embodiment, the bottom of the opening 18 is higher than the bottom of the cavity 16, that is, the bottom of the opening 18 is located above the bottom of the cavity 16, so that the toilet body 12 forms a step 32 between the bottom of the opening 18 and the bottom of the cavity 16, that is, the toilet body 12 forms a step 32 below the opening 18, and the step 32 extends upward relative to the bottom surface of the cavity 16, thereby preventing the liquid in the cavity 16 from flowing out through the opening 18, thereby preventing the liquid in the cavity 16 from leaking out.

[0051] The urinal body 12 includes a bottom wall 34 and a surrounding wall 36 which is arranged with the bottom wall 34 to form a cavity 16. The bottom wall 34 is in the shape of a straight plate, and its bottom surface is a plane, so that the urinal 10 can be placed directly on the ground. The surrounding wall 36 is in the shape of a hemisphere, and the opening 18 is arranged on one side of the surrounding wall 36. The contour line of the opening 18 extends along an arc trajectory in the vertical direction Z, and the diameter of the opening 18 in the horizontal direction Y shows a trend of gradually increasing and then gradually decreasing from top to bottom along the vertical direction Z, so that the surrounding wall 36 can surround the cavity 16 to a greater extent to prevent the liquid in the cavity 16 from leaking out.

[0052] In this embodiment, the portion where the guide surface 22 and the surrounding wall 36 are in contact with each other forms the vertical section 28 of the first edge 24, and the portion where the guide surface 22 and the bottom wall 34 are in contact with each other forms the horizontal section 30 of the first edge 24. The second edge 26 extends from the surrounding wall 36 to the bottom wall 34 along the vertical direction Z, so that its two ends intersect with the vertical section 28 and the horizontal section 30 respectively.

[0053] Specifically, the opening 18 extends from the top of the surrounding wall 36 toward the outside in the inner and outer direction X, so that the opening 18 is inclined relative to the vertical direction Z, and there is a gap between the bottom surface of the opening 18 and the bottom surface of the surrounding wall 36, so that the surrounding wall 36 forms a step 32 below the opening 18 to prevent liquid leakage.

[0054] Preferably, the bottom wall 34 and the surrounding wall 36 are integrally formed to ensure the connection strength between the bottom wall 34 and the surrounding wall 36, eliminating the assembly process and preventing the liquid in the cavity 16 from leaking out due to a gap between the bottom wall 34 and the surrounding wall 36 during production or assembly.

[0055] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A urinal, characterized in that: The toilet bowl comprises a toilet bowl body and a splash-proof protrusion located in the toilet bowl body, wherein the toilet bowl body is provided with a cavity and an opening connected to the cavity, and the splash-proof protrusion is located in the cavity and protrudes from the inner wall of the toilet bowl body toward the opening; The splash-proof protrusion includes a guide surface facing the opening, the urinal has a vertical direction, a horizontal direction, and an inner-outer direction that are perpendicular to each other, the guide surface is inclined relative to the vertical direction, the horizontal direction, and the inner-outer direction, the top and bottom of the guide surface are projections in the same horizontal plane, and the projection of the top of the guide surface is located on the inner side of the projection of the bottom of the guide surface in the inner-outer direction.

2. The urinal according to claim 1, characterized in that: Along the same length in the vertical direction, the area of ​​the top of the guide surface is smaller than the area of ​​the bottom of the guide surface.

3. The urinal according to claim 2, characterized in that: The guide surface includes a first edge and a second edge extending along the vertical direction, the second edge is closer to the opening in the inner and outer directions relative to the first edge, and the distance between the first edge and the second edge gradually increases from top to bottom in the vertical direction.

4. The urinal according to claim 1, characterized in that: The guide surface includes a first edge and a second edge extending along the vertical direction, the second edge is closer to the opening in the inner and outer directions relative to the first edge, the first edge extends outwardly with a first curvature at the top of the guide surface relative to the second edge, and extends inwardly with a second curvature at the bottom of the guide surface, and the first curvature is smaller than the second curvature.

5. The urinal according to claim 1, characterized in that: The anti-splash protrusion is provided with the guide surfaces on both sides of the horizontal direction, and the two guide surfaces extend outward from top to bottom in the vertical direction.

6. The urinal according to claim 5, characterized in that: Each of the guide surfaces includes a first edge and a second edge extending along the vertical direction, the first edge is connected to the inner wall of the toilet body, the second edge is connected between two ends of the first edge, and the second edges of the two guide surfaces overlap.

7. The urinal according to claim 6, characterized in that: The first edge includes a vertical segment extending along the vertical direction and a horizontal segment located in a horizontal plane, one end of the vertical segment intersects with one end of the second edge, and two ends of the horizontal segment intersect with the vertical segment and the other end of the second edge respectively.

8. The urinal according to claim 1, characterized in that: The cross-sectional area of ​​the splash-proof protrusion gradually increases from top to bottom in the vertical direction.

9. The urinal according to any one of claims 1 to 8, characterized in that: The bottom of the opening is higher than the bottom of the cavity, so that the toilet body forms a step between the bottom of the opening and the bottom of the cavity.

10. The urinal according to any one of claims 1 to 8, characterized in that: Two pedals are provided in the cavity, the pedals are located between the anti-splash protrusion and the opening, and the two pedals are spaced apart in the horizontal direction; and / or The toilet body comprises a bottom wall and a surrounding wall which is arranged with the bottom wall to form the cavity, the surrounding wall is hemispherical, the opening is arranged on one side of the surrounding wall, and the contour line of the opening extends along an arc track in the vertical direction.

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