A porous elastic curved surface tea filter and tea making appliance

Abstract

The application discloses a porous elastic curved surface tea filter and a tea making appliance, and relates to the technical field of tea making appliances. The tea making appliance comprises a porous elastic curved surface tea filter and a teapot. The porous elastic curved surface tea filter comprises a curved surface body and an extension part. The curved surface body can have a first shape and a second shape under the action of an external force. When the curved surface body is horizontally placed, the first shape of the curved surface body is an upward convex curved surface body, and the second shape of the curved surface body is a downward concave shape. The angle of the extension part relative to the vertical direction can change along with the transformation of the curved surface body between the first shape and the second shape, so that the maximum radius of the porous elastic curved surface tea filter changes. The inner wall of the teapot is provided with a clamping part in the circumferential direction, and the extension part can be clamped or separated with the clamping part. In the application, the clamping or separation of the extension part and the clamping part is realized through the shape change of the curved surface body, so that the step of placing tea leaves first and then pressing the tea filter cover can be omitted during tea making, and the operation is simple and more sanitary.

Description

Technical Field

[0001] This utility model relates to the technical field of teaware, specifically to a porous elastic curved surface tea filter and tea brewing utensil. Background Technology

[0002] Currently, tea strainers are one of the tools used in tea brewing, often used in conjunction with containers (such as teacups or teapots) to separate tea leaves. The current tea-brewing process using a tea strainer and teapot combination is: wash the teapot and tea strainer - put tea leaves into the teapot - cover with the tea strainer - add boiling water to the teapot to brew the tea. There are problems with covering the tea strainer: it requires pressing it in by hand, which is an extra step, and also because hands have already touched tea leaves or other items, potentially causing contamination, and pressing the tea strainer by hand is unhygienic. In addition, existing tea strainers are assembled by elastic deformation and friction against the cup wall, which can easily lead to the tea strainer not being properly secured and becoming loose, or the tea strainer being too tightly secured, making it difficult to put in and take out. Utility Model Content

[0003] To address the aforementioned problems, this invention provides a porous, elastic curved surface tea filter and a tea brewing utensil.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0005] A porous elastic curved surface tea filter includes a curved body and an extension portion. The curved body has filter holes arranged in a pattern and has clearance notches. The extension portion is arranged along the outer periphery of the curved body and connected to the curved body, and expands outward in a direction away from the center of the curved body. The curved body has elastic deformation capability so that it can have a first shape and a second shape under the action of external force. When the curved body is placed horizontally, the first shape of the curved body is defined as upward convexity, and the second shape of the curved body is downward concaveness. The angle of the extension portion relative to the vertical direction can change as the curved body changes between the first shape and the second shape, and the extension portion is always below or coincident with the horizontal plane, thereby causing the maximum radius of the porous elastic curved surface tea filter in the vertical projection plane to change. Furthermore, the maximum radius of the porous elastic curved surface tea filter when the curved body is in the second shape is greater than the maximum radius when the curved body is in the first shape.

[0006] Optionally, the extension part comprises a first extension, and the first extension is arranged at intervals along the circumferential edge of the curved surface body; the first extension is configured such that: when the curved surface body is in the first configuration and placed horizontally, an included angle between the first extension and the vertical direction is A1, and a distance from an outer edge of the first extension to a center of the curved surface body is taken as a radius r1 in a vertical projection plane of the porous elastic curved tea strainer; when the curved surface body is in the second configuration and placed horizontally, an included angle between the extension part and the vertical direction is A1', and a distance from the outer edge of the first extension to the center of the curved surface body is taken as a radius r1' in the vertical projection plane of the porous elastic curved tea strainer; wherein, A1 < A1', and r1 < r1'.

[0007] Optionally, the extension part comprises a second extension and a third extension, the second extension is arranged at intervals along the circumferential direction of the curved surface body, and the third extension is arranged at intervals along the circumferential direction of the curved surface body; the second extension and the third extension are configured such that: when the curved surface body is in the first configuration and placed horizontally, an included angle between the second extension and the vertical direction is A2, an included angle between the third extension and the vertical direction is A3, in a vertical projection plane of the porous elastic curved tea strainer, a distance from an outer edge of the second extension to the center of the curved surface body is taken as a radius r2, a distance from an outer edge of the third extension to the center of the curved surface body is taken as a radius r3, A2 < A3, and r2 < r3; when the curved surface body is in the second configuration and placed horizontally, an included angle between the second extension and the vertical direction is A2', an included angle between the third extension and the vertical direction is A3', in the vertical projection plane of the porous elastic curved tea strainer, a distance from an outer edge of the second extension to the center of the curved surface body is taken as a radius r2', a distance from an outer edge of the third extension to the center of the curved surface body is taken as a radius r3', A2' < A3', and r2' < r3'; wherein, r2' > r2, and r3' > r3.

[0008] Optionally, the relief notch is arranged at the center of the curved surface body; or, the relief notch is arranged at an edge of the curved surface body.

[0009] Optionally, a punched hole is arranged at a position of the curved surface body close to the extension part; and / or, the filter holes comprise at least two kinds of hole positions with different shapes.

[0010] Optionally, the curved surface body further has a third configuration, and in the third configuration, the curved surface body is substantially a planar structure, and the extension part and the curved surface body are substantially in the same plane.

[0011] A tea brewing apparatus, comprising a porous elastic curved tea strainer and a teapot; the porous elastic curved tea strainer comprises a curved body and an outward extension portion; the curved body is provided with filter holes arranged thereon and is provided with an avoiding notch; the outward extension portion is arranged along the outer peripheral side of the curved body, connected to the curved body, and expands outward in a direction away from the center of the curved body; the curved body has elastic deformation capability so that the curved body can have a first configuration and a second configuration under the action of external force; when the curved body is placed horizontally, the first configuration of the curved body is defined as being convex upward, and the second configuration of the curved body is defined as being concave downward; the angle of the outward extension portion relative to the vertical direction can be changed as the curved body transforms between the first configuration and the second configuration, and the outward extension portion is always located below or coincided with the horizontal plane relative to the horizontal plane, thereby enabling the maximum radius of the vertical projection surface of the porous elastic curved tea strainer to change, and the maximum radius of the porous elastic curved tea strainer when the curved body is in the second configuration is larger than that when the curved body is in the first configuration;

[0012] A clamping portion is arranged circumferentially on the inner wall of the teapot, and the maximum radius of the vertical projection surface of the porous elastic curved tea strainer is changed under the action of external force, so that the outward extension portion can be clamped with or separated from the clamping portion.

[0013] Optionally, the outward extension portion comprises a first outward extension, which is arranged at intervals along the circumferential edge of the curved body; the clamping portion comprises a first protrusion and a second protrusion annularly arranged on the circumferential inner wall of the teapot, wherein the inner ring radius R1 of the first protrusion is larger than the inner ring radius R2 of the second protrusion; an annular groove is formed between the first protrusion and the second protrusion;

[0014] The outward extension portion and the clamping portion are configured such that: when the curved body is in the first configuration and placed horizontally, the included angle of the first outward extension relative to the vertical direction is A1, and the radius of the vertical projection surface of the porous elastic curved tea strainer is r1, which is the distance from the outer edge of the first outward extension to the center of the curved body; wherein R1>r1 and R2<r1, so that the first outward extension can be placed on the second protrusion from top to bottom, or can be taken out from bottom to top and separated from the clamping portion;

[0015] When the curved body is in the second configuration and placed horizontally, the included angle of the outward extension portion relative to the vertical direction is A1', and the radius of the vertical projection surface of the porous elastic curved tea strainer is r1', which is the distance from the outer edge of the first outward extension to the center of the curved body, A1<A1', r1<r1'; wherein R1<r1' and R2<r1', so that the first outward extension is clamped in the annular groove, thereby enabling the outward extension portion and the clamping portion to be clamped with each other.

[0016] Optionally, the extension portion includes a second extension and a third extension, wherein the second extension is arranged at intervals along the circumferential direction of the curved body, and the third extension is arranged at intervals along the circumferential direction of the curved body; the clamping portion includes third protrusions annularly arranged on the circumferential inner wall of the teapot, and an inner ring radius of the third protrusions is R3;

[0017] The extension portion and the clamping portion are configured such that: when the curved body is in a first shape and placed horizontally, an included angle between the second extension and a vertical direction is A2, an included angle between the third extension and the vertical direction is A3, on a vertical projection plane of the porous elastic curved tea strainer, a distance from an outer edge of the second extension to a center of the curved body is taken as a radius r2, a distance from an outer edge of the third extension to the center of the curved body is taken as a radius r3, A2<A3, r2<r3; wherein r2<R3<r3, so that the second extension can pass over an upper end face of the third convex ring from top to bottom and enable the third extension to be lapped on the upper end face, or the second extension can be separated from the third convex ring from bottom to top, so that the extension portion and the clamping portion are separated from each other;

[0018] When the curved body is in a second shape and placed horizontally, an included angle between the second extension and the vertical direction is A2', an included angle between the third extension and the vertical direction is A3', on the vertical projection plane of the porous elastic curved tea strainer, a distance from an outer edge of the second extension to a center of the curved body is taken as a radius r2', a distance from an outer edge of the third extension to the center of the curved body is taken as a radius r3', A2'<A3', r2'<r3', and r2'>r2, r3'>r3; wherein R3<r2'<r3', so that the second extension can abut against a lower end face of the third convex ring, and the third extension can be lapped on an upper end face of the third convex ring, so that the extension portion and the clamping portion are clamped with each other.

[0019] Optionally, the abdication notch is arranged at a center of the curved body; or, the abdication notch is arranged at an edge of the curved body.

[0020] Optionally, a punched hole is arranged at a position of the curved body close to the extension portion; and / or, the filter holes include at least two hole positions with different shapes.

[0021] Optionally, the curved body further has a third shape, in the third shape, the curved body is substantially in a planar structure, and the extension portion and the curved body are substantially in a same plane.

[0022] Optionally, the present invention further includes a pot lid, an inner wall of the pot lid is provided with a first matching portion, and the extension portion can be clamped with or separated from the first matching portion;

[0023] and / or, an outer wall of the teapot is provided with a storage groove, a second matching portion is arranged in the storage groove, and the extension portion can be clamped with or separated from the second matching portion.

[0024] The technical solution provided by this utility model has the following beneficial effects:

[0025] 1. Utilizing the elastic deformation capability of the curved surface, which possesses both a first and a second form, the maximum radius of the porous elastic curved surface tea filter changes, allowing it to separate from or snap into the locking part inside the teapot. Installation and disassembly are simple and convenient. The curved surface structure saves materials and eliminates hard-to-clean corners, facilitating cleaning. When brewing tea, the cleaned porous elastic curved surface tea filter can be placed directly into the opening of the container, followed by adding tea leaves through the notch in the filter. This eliminates the need to first add tea leaves and then press down on the filter, simplifying the process and avoiding the indirect contamination problem caused by tea leaves coming into contact with the filter again, as is common in existing technologies. This makes the operation more hygienic.

[0026] 2. The perforation setting can change the local elasticity of the curved body, making the angle between the extension and the vertical direction more easily change with the shape of the curved body, thereby changing the maximum radius of the entire porous elastic curved surface tea filter.

[0027] 3. The filter holes not only have a filtering function, but also can change the elasticity of the curved surface, allowing it to better transform between the first and second forms. Furthermore, setting different shapes of filter holes and arranging them can improve the overall aesthetics.

[0028] 4. The porous, flexible curved tea strainer can be snapped into the inside of the lid or the outside of the teapot for storage; when not brewing tea, the tea strainer can be stored away and used as a regular teapot or teacup. Attached Figure Description

[0029] Figure 1 This is a cross-sectional view of the curved surface in the first state and the mouth of the teapot in Embodiment 1;

[0030] Figure 2 This is a cross-sectional view of the curved surface in the second state and the mouth of the teapot in Embodiment 1;

[0031] Figure 3 This is a schematic diagram of the curved surface in the first state in this embodiment;

[0032] Figure 4 This is a schematic diagram of the curved surface in the second state in this embodiment;

[0033] Figure 5 This is a schematic diagram of a porous elastic curved surface tea filter in another embodiment;

[0034] Figure 6 This is a simplified schematic diagram of the curved surface in its first state and the snap-fit ​​part in Embodiment 1;

[0035] Figure 7 This is a simplified schematic diagram of the curved surface in the second state and the snap-fit ​​part in one of the embodiments;

[0036] Figure 8 This is a schematic diagram of the porous elastic curved surface tea filter in the first state in Embodiment 2;

[0037] Figure 9 This is a schematic diagram of the porous elastic curved surface tea filter in the second embodiment, in its second state.

[0038] Figure 10 This is a schematic diagram of a porous elastic curved surface tea filter in the first state of the curved body in Embodiment 3;

[0039] Figure 11 This is a schematic diagram of a porous elastic curved surface tea filter in the second state of the curved body in Embodiment 3;

[0040] Figure 12 This is a simplified schematic diagram of the curved surface in the first state and the snap-fit ​​part in Embodiment 3;

[0041] Figure 13 This is a simplified schematic diagram of the curved surface in the second state and the snap-fit ​​part in Embodiment 3;

[0042] Figure 14 This is a schematic diagram of the porous elastic curved surface tea filter in Example 4;

[0043] Figure 15 This is a schematic diagram of the porous elastic curved surface tea filter and teapot in Example 4;

[0044] Figure 16 This is a schematic diagram of the porous elastic curved surface tea filter, teapot, and lid in Example 4;

[0045] Figure 17 This is a schematic diagram of the porous elastic curved surface tea filter housed at the bottom of the outer wall of the teapot in Example 5.

[0046] Explanation of reference numerals in the attached drawings: 1. Teapot; 11. Storage groove; 12. Second mating part; 2. Porous elastic curved surface tea filter; 3. Curved surface; 4. Extension part; 41. First extension; 42. Second extension; 43. Third extension; 5. Snap-fit ​​part; 51. First protrusion; 52. Second protrusion; 53. Annular groove; 54. Third protrusion; 6. Filter hole; 7. Relief notch; 8. Punch; 9. Teapot lid; 91. First mating part. Detailed Implementation

[0047] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0048] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0049] Example 1:

[0050] Reference Figure 1-7 This embodiment provides a tea brewing utensil, including a porous elastic curved surface tea filter 2 and a teapot 1.

[0051] The porous elastic curved surface tea filter 2 includes a curved body 3 and an extension portion 4. The curved body 3 has an overall structure similar to a spherical shell. Filter holes 6 are arranged on the curved body 3, and clearance notches 7 are provided. The extension portion 4 is arranged along the outer periphery of the curved body 3 and connected to the curved body 3, and expands outward in a direction away from the center of the curved body 3. The curved body 3 has elastic deformation capability so that the curved body 3 can have a first shape and a second shape under the action of external force. When the curved body 3 is placed horizontally, the first shape of the curved body 3 is upward convex, and the second shape of the curved body 3 is downward concave. The angle of the extension portion 4 relative to the vertical direction can change as the curved body 3 changes between the first and second forms, and the extension portion 4 is always located below or coincides with the horizontal plane relative to the horizontal plane, so that the maximum radius of the porous elastic curved surface tea filter 2 on the vertical projection plane changes. Furthermore, the maximum radius of the porous elastic curved surface tea filter 2 when the curved body 3 is in the second form is greater than the maximum radius when the curved body 3 is in the first form.

[0052] The inner wall of the teapot 1 is provided with a snap-fit ​​part 5 along the circumference. The porous elastic curved surface tea filter 2 changes its maximum radius on the vertical projection plane under the action of external force, so that the outer extension part 4 can snap or separate from the snap-fit ​​part 5.

[0053] Through the variable shape of the curved surface body 3, the porous elastic curved tea strainer 2 can be clamped to or separated from the teapot 1. The arrangement of the curved surface body 3 requires less overall material consumption and has a stable structure; there are no dead corners for cleaning, which brings a better user experience. When making tea, clean the porous elastic curved tea strainer 2, keep the curved surface body 3 in the first shape, put it into the teapot 1, and press the curved surface body 3 down by external force to make it in the second shape, so that the extension part 4 can be clamped with the clamping part 5. Since the curved surface body 3 is concave downward in the second shape, tea leaves can smoothly pass through the abdication notch 7 on the curved surface body 3 and be put therein; thus, compared with the problem of indirect contamination caused by putting tea leaves first and then the tea strainer in the prior art, the operation of the present invention is more hygienic. When cleaning tea leaves and the porous elastic curved tea strainer 2, a person can hook the abdication notch 7 with their hand and pull the curved surface body 3 upward, so that the curved surface body 3 deforms back to the first shape, thereby allowing the extension part 4 to separate from the clamping part 5, which is simple and convenient to operate.

[0054] Specifically, as Figure 1 and Figure 2 , the extension part 4 includes a first extension 41, which is arranged at intervals along the circumferential edge of the curved surface body 3, and the intervals are uniform. The clamping part 5 includes a first protrusion 51 and a second protrusion 52 annularly arranged on the circumferential inner wall of the teapot 1, and the first protrusion 51 and the second protrusion 52 are arranged on the inner wall of the teapot 1 from top to bottom. The inner ring radius R1 of the first protrusion 51 is larger than the inner ring radius R2 of the second protrusion 52. An annular groove 53 is formed between the first protrusion 51 and the second protrusion 52.

[0055] As Figure 6 and Figure 7 shown, the extension part 4 and the clamping part 5 are configured as:

[0056] When the curved surface body 3 is in the first shape and placed horizontally, the included angle between the first extension 41 and the vertical direction is A1, and the length thereof is L1; in the vertical projection plane of the porous elastic curved tea strainer 2, the distance from the outer edge of the first extension 41 to the center of the curved surface body 3 is taken as the radius r1; wherein, R1>r1 and R2<r1, so that the first extension 41 can be placed on the second protrusion 52 from top to bottom, or can be taken out from bottom to top and separated from the clamping part 5.

[0057] When the curved surface body 3 is in the second shape and placed horizontally, the included angle between the extension part 4 and the vertical direction is A1', and the length thereof is L1; in the vertical projection plane of the porous elastic curved tea strainer 2, the distance from the outer edge of the first extension 41 to the center of the curved surface body 3 is taken as the radius r1', A1<A1', r1<r1'; wherein, R1<r1' and R2<r1', so that the first extension 41 is clamped in the annular groove 53, and further the first extension 41 and the clamping part 5 are clamped with each other.

[0058] When installing the porous elastic curved tea strainer 2, clean it, and keep the curved body 3 in the first form of protruding upward, lower the porous elastic curved tea strainer 2 into the teapot 1, and the first outer extension 41 passes through the first protrusion 51 and then overlaps on the second protrusion 52. Press down on the curved body 3 to deform it and transform it into the second state of recessed downward. At this time, the radius variation of the porous elastic curved tea strainer 2 is D1=r1'-r1=sinA1'×L1-sinA1×L1, R1<r1', R2<r1'; thus, the first outer extension 41 can be clamped and retained in the annular groove 53. When taking out the porous elastic curved tea strainer 2, it is only necessary to lift the curved body 3 upward from the abdication notch 7. The first outer extension 41 abuts against the lower end surface of the first protrusion 51, and continue to lift the curved body 3 upward, so that the curved body 3 transforms from the second form to the first form, and the radius of the porous elastic curved tea strainer 2 on the vertical projection plane, which is the distance from the outer edge of the first outer extension 41 to the center of the curved body 3, returns to r1. Since R1>r1, the first outer extension 41 can be separated from the first protrusion 51, and the porous elastic curved tea strainer 2 is taken out.

[0059] Further, the abdication notch 7 is arranged at the center of the curved body 3, and the abdication notch 7 is in a circular hole structure. By arranging the abdication notch 7 at the center of the curved body 3, when the curved body 3 is recessed downward and in the second form, most tea leaves can automatically fall into the teapot 1 through the abdication notch 7 along the inner wall of the curved body 3. Even if a small part of tea leaves remain on the curved body 3, the tea leaves can be washed into the teapot 1 through the abdication notch 7 by pouring hot water into the teapot 1 subsequently.

[0060] Further, as Figure 3 and Figure 4 shows, a punching hole 8 is arranged at a position of the curved body 3 close to the outer extension part 4. Through the arrangement of the punching hole 8, the elasticity at the connection position between the curved body 3 and the outer extension part 4 can be changed, so that the included angle between the first outer extension 41 and the vertical direction can more easily change accordingly during the transformation process of the curved body 3 between the first form and the second form. The size, shape and number of the punching holes 8 can be set according to actual conditions. In this embodiment, two punching holes 8 are correspondingly configured for each first outer extension 41, and the punching holes 8 are in the shape of small circular holes. In other embodiments, as Figure 5 shows, the punching holes 8 can be in the shape of rectangular holes.

[0061] Furthermore, in this embodiment, the appearance and tactile feel of the curved body 3 are related, and can be adjusted by the shape and arrangement of the filter holes 6 on the curved body 3. Therefore, the filter holes 6 include at least two different shapes of holes. In this embodiment, the filter holes 6 have two shapes: strip holes and circular holes. The strip holes are arranged in the middle of the curved body 3 and are evenly spaced circumferentially at a certain angle, so that all the strip holes are arranged in an outward spiral radial state; the circular holes are arranged around the strip holes. This arrangement can improve the aesthetics of the porous elastic curved surface tea filter 2 and improve the user experience. In addition, the size and density of the filter holes 6 can change the elasticity of local positions of the curved body 3, so that the curved body 3 can better transform between the first and second forms. In other embodiments, the shape of the filter holes 6 is not limited to two, so that users can have different sensory experiences.

[0062] Example 2:

[0063] like Figure 8 and Figure 9 As shown, the difference between this embodiment and Embodiment 1 is that the clearance notch 7 is located at the edge of the curved body 3, forming an arc-shaped notch structure. When brewing tea, especially loose tea, the tea leaves can be slowly poured onto the curved body 3 directly. The tea leaves will not fall directly from the clearance notch 7, making it easy to observe the amount of tea leaves poured in. When enough tea leaves have been poured in, the teapot 1 is tilted towards the side where the clearance notch 7 is located, allowing the tea leaves to fall into the bottom of the teapot 1 through the clearance notch 7, and then the tea can be brewed. When pouring tea, the teapot 1 is tilted away from the side where the clearance notch 7 is located, so the tea leaves will not flow out through the clearance notch 7. When it is necessary to pour out the tea leaves from the teapot 1, the teapot 1 is tilted towards the side where the clearance notch 7 is located, and the tea leaves can be poured out through the clearance notch 7. If there are residual tea leaves in the teapot 1, water can be added to the teapot 1, allowing the tea leaves to flow out through the clearance notch 7 with the water flow. In this way, the tea leaves in the teapot 1 can be cleaned without removing the porous elastic curved tea filter 2.

[0064] Example 3:

[0065] like Figure 10-13 As shown, this embodiment differs from Embodiment 1 in that: the extension portion 4 includes a second extension 42 and a third extension 43, the second extension 42 being arranged at intervals along the circumference of the curved body 3, and the third extension 43 being arranged at intervals along the circumference of the curved body 3. The snap-fit ​​portion 5 includes a third protrusion 54 arranged in a ring on the inner circumference of the teapot 1, the inner radius of the third protrusion 54 being R3.

[0066] As shown in the figure, the extension portion 4 and the clamping portion 5 are configured such that: when the curved surface body 3 is in a first configuration and placed horizontally, an included angle between the second extension 42 and the vertical direction is A2, and the length thereof is L2; an included angle between the third extension 43 and the vertical direction is A3, and the length thereof is L3; for the porous elastic curved tea strainer 2, on a vertical projection plane, a distance from an outer edge of the second extension 42 to a center of the curved surface body 3 is taken as a radius r2, and a distance from an outer edge of the third extension 43 to the center of the curved surface body 3 is taken as a radius r3, wherein A2<A3 and r2<r3; wherein r2<R3<r3, such that the second extension 42 can pass over an upper end surface of the third convex ring from top to bottom and the third extension 43 can be lapped on the upper end surface, or the second extension 42 can be separated from the third convex ring from bottom to top, so that the extension portion 4 and the clamping portion 5 are separated from each other;

[0067] When the curved surface body 3 is in a second configuration and placed horizontally, an included angle between the second extension 42 and the vertical direction is A2', and an included angle between the third extension 43 and the vertical direction is A3'; for the porous elastic curved tea strainer 2, on a vertical projection plane, a distance from an outer edge of the second extension 42 to a center of the curved surface body 3 is taken as a radius r2', and a distance from an outer edge of the third extension 43 to the center of the curved surface body 3 is taken as a radius r3', wherein A2'<A3' and r2'<r3', and further, r2'>r2 and r3'>r3; wherein R3<r2'<r3', such that the second extension 42 can abut against a lower end surface of the third convex ring and the third extension 43 can be lapped on an upper end surface of the third convex ring, so that the extension portion 4 and the clamping portion 5 are clamped with each other.

[0068] When installing the porous elastic curved tea filter 2, clean it, and make the curved body 3 in a first shape protruding upward, lower the porous elastic curved tea filter 2 into the teapot 1. In the vertical projection plane, since r2<R3<r3, the second outer extension 42 can pass over the third protrusion 54 from top to bottom, and at the same time, the third outer extension 43 can overlap on the upper end surface of the third protrusion 54. Press down the curved body 3 to deform it and convert it to a second state of concave downward. At this time, for the porous elastic curved tea filter 2, the radius change amount D2 of the distance from the outer edge of the second outer extension 42 to the center of the curved body 3 is D2 = r2'-r2 = sinA2'×L2-sinA2×L2, and the radius change amount D3 of the distance from the outer edge of the third outer extension 43 to the center of the curved body 3 is D3 = r3'-r3 = sinA3'×L3-sinA3×L3, and R3<r2'<r3'. In this way, the second outer extension 42 abuts against the lower end surface of the third protrusion 54, and the third outer extension 43 overlaps on the upper end surface of the third protrusion 54, realizing the mutual clamping between the outer extension part 4 and the clamping part 5. When taking out the porous elastic curved tea filter 2, it is only necessary to lift the curved body 3 upward from the abdication notch 7, the curved body 3 changes from the second shape to the first shape, and the radius of the distance from the outer edge of the second outer extension 42 to the center of the curved body 3 of the porous elastic curved tea filter 2 in the vertical projection plane changes back to r2, and the radius of the distance from the outer edge of the third outer extension 43 to the center of the curved body 3 changes back to r3. Since r2<R3, the second outer extension 42 can be separated from the third protrusion 54 from bottom to top, and the porous elastic curved tea filter 2 is taken out.

[0069] In this embodiment, the second outer extensions 42 and the third outer extensions 43 are staggered, and the spacing between each second outer extension 42 and two adjacent third outer extensions 43 is the same. This arrangement makes the force of the porous elastic curved tea filter 2 more uniform during the clamping assembly with the teapot 1.

[0070] Embodiment 4:

[0071] As Figure 14-16 shown, the difference between this embodiment and the second embodiment is that: the curved body 3 further has a third shape, in the third shape, the curved body 3 is generally in a planar structure, and the outer extension part 4 and the curved body 3 are generally on the same plane. In the first shape, the curved body 3 protrudes upward; in the second shape, the curved body 3 is concave downward; the third shape is an intermediate shape relative to the mutual transformation between the first shape and the second shape. It should be noted that, in the third shape, when the included angle from the edge of the curved body 3 to the center of the curved body 3 is less than 5°, it can be regarded as a substantially planar structure. Of course, in an ideal state, the curved body 3 can also be a completely planar structure. Similarly, the outer extension part 4 and the curved body 3 can be integrally connected and generally on the same plane. In this way, the structure of the tea filter is simpler.

[0072] Furthermore, the tea brewing utensil also includes a teapot lid 9, with a first mating part 91 on the inner wall of the lid 9, and an outer extension 4 that can engage or disengage with the first mating part 91. Specifically, an annular groove is provided circumferentially on the inner wall of the lid 9 as the first mating part 91. Since the curved body 3 and the outer extension 4 are roughly a flat, one-piece structure, the tea filter in this embodiment has a more optimized vertical mating space, making it easier to store inside the lid 9 when the tea filter is not needed. In this embodiment, since the lid 9 itself is a shell structure with a corresponding matching groove, it can be stably stored. In other embodiments, when the annular groove is not provided circumferentially on the groove of the lid 9, the porous curved elastic tea filter 2, under its own deformation capability, can also have its outer extension 4 pressed against the inner wall of the lid 9 under the elastic force of the curved body 3, thereby storing the tea filter; that is, the inner wall of the lid 9 directly serves as the first mating part 91; of course, this storage effect is not as stable. Furthermore, in other embodiments, the lid 9 can also be adapted to the tea filter structure in Embodiment 1 or Embodiment 2, and the height of the annular groove serving as the first mating part 91 can be adjusted accordingly. If the tea filter structure in Embodiment 3 is to be used, the first mating part 9 inside the lid 9 should be provided with a structure similar to the snap-fit ​​part 5 in Embodiment 3.

[0073] Example 5:

[0074] like Figure 17 As shown, this embodiment differs from Embodiment 1 in that: a storage groove 11 is provided at the bottom of the outer wall of the teapot 1, and a second mating part 12 is provided in the storage groove 11. The outer extension 4 can be engaged or disengaged from the second mating part 12. Specifically, the structure of the second mating part 12 is the same as that of the snap-fit ​​part 5, using two annular protrusions with different inner diameters. An annular groove is formed between the two annular protrusions as the second mating part 12, for the outer extension 4 of the tea filter to engage. When the tea filter is not needed, it can be stored in the storage groove 11 outside the teapot 1. When storing the tea filter, since there is an angle between the outer extension 4 and the curved surface 3, the storage space required for the tea filter can be pulled down in the opposite direction. In addition, in other embodiments, the circumferential groove wall of the storage groove 11 can also be directly used as the second mating part 12, utilizing the elastic deformability of the tea filter to press the outer extension 4 against the circumferential groove wall of the storage groove 11; of course, this storage effect is not as stable. The storage groove 11 of this embodiment is also applicable to the tea filter structure in Embodiment 2 or Embodiment 4. In other embodiments, when the tea filter structure of Embodiment 3 is used, the structure of the second mating part 12 is adapted to match the structure of the snap-fit ​​part 5 of Embodiment 3. Furthermore, the storage groove 11 can also be located on the outer circumference of the teapot 1.

[0075] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A porous elastic curved surface tea filter, characterized in that: comprising a curved surface body and an outward extension portion; the curved surface body is provided with filter holes in an arranged manner and is provided with an avoidance notch; the outward extension portion is arranged along the peripheral side of the curved surface body, connected to the curved surface body, and expands outward in a direction away from the center of the curved surface body; the curved surface body has elastic deformation capability so that the curved surface body can have a first shape and a second shape under the action of an external force; when the curved surface body is placed horizontally, the first shape of the curved surface body is convex upward, and the second shape of the curved surface body is concave downward; the angle of the outward extension portion relative to the vertical direction can be changed as the curved surface body transforms between the first shape and the second shape, and the outward extension portion is always located below the horizontal plane or coincides with the horizontal plane relative to the horizontal plane, so that the maximum radius of the porous elastic curved tea strainer on the vertical projection surface is changed, and the maximum radius of the porous elastic curved tea strainer when the curved surface body is in the second shape is larger than that when the curved surface body is in the first shape.

2. The porous elastic curved surface tea filter according to claim 1, characterized in that: the outward extension portion comprises a first outward extension, and the first outward extension is arranged at intervals along the circumferential edge of the curved surface body; the first outward extension is configured such that: when the curved surface body is in the first shape and placed horizontally, an included angle of the first outward extension relative to the vertical direction is A1, and the radius of the porous elastic curved tea strainer on the vertical projection surface is r1 which is the distance from the outer edge of the first outward extension to the center of the curved surface body; when the curved surface body is in the second shape and placed horizontally, an included angle of the outward extension portion relative to the vertical direction is A1', and the radius of the porous elastic curved tea strainer on the vertical projection surface is r1' which is the distance from the outer edge of the first outward extension to the center of the curved surface body; wherein, A1 < A1', r1 < r1'.

3. A porous elastic curved surface tea filter according to claim 1, characterized in that: the outward extension portion comprises a second outward extension and a third outward extension, the second outward extension is arranged at intervals along the circumferential direction of the curved surface body, and the third outward extension is arranged at intervals along the circumferential direction of the curved surface body; the second outward extension and the third outward extension are configured such that: when the curved surface body is in the first shape and placed horizontally, an included angle of the second outward extension relative to the vertical direction is A2, an included angle of the third outward extension relative to the vertical direction is A3, on the vertical projection surface of the porous elastic curved tea strainer, the radius r2 is the distance from the outer edge of the second outward extension to the center of the curved surface body, and the radius r3 is the distance from the outer edge of the third outward extension to the center of the curved surface body, A2 < A3, r2 < r3; when the curved surface body is in the second shape and placed horizontally, an included angle of the second outward extension relative to the vertical direction is A2', an included angle of the third outward extension relative to the vertical direction is A3', on the vertical projection surface of the porous elastic curved tea strainer, the radius r2' is the distance from the outer edge of the second outward extension to the center of the curved surface body, and the radius r3' is the distance from the outer edge of the third outward extension to the center of the curved surface body, A2' < A3', r2' < r3'; wherein, r2' > r2, r3' > r3.

4. A porous elastic curved surface tea filter according to claim 1, characterized in that: the avoidance notch is arranged at the center of the curved surface body; or the avoidance notch is arranged at the edge of the curved surface body.

5. A porous elastic curved surface tea filter according to claim 1, characterized in that: the curved surface body is provided with punched holes at a position close to the outward extension portion; and / or, the filter holes comprise hole positions of at least two different shapes.

6. A porous elastic curved surface tea filter according to claim 1, characterized in that: The curved surface body further has a third form. In the third form, the curved surface body is substantially of a planar structure, and the extension portion and the curved surface body are substantially in the same plane.

7. A tea brewing utensil, characterized in that: Comprising a porous elastic curved tea strainer and a teapot; The porous elastic curved tea strainer comprises a curved surface body and an extension portion; filter holes are arranged on the curved surface body, and a clearance notch is formed on the curved surface body; the extension portion is arranged along the peripheral side of the curved surface body, connected to the curved surface body, and expands outward in a direction away from the center of the curved surface body; the curved surface body has elastic deformation capability so that the curved surface body can have a first form and a second form under an external force; When the curved surface body is placed horizontally, it is defined that the first form of the curved surface body is protruding upward, and the second form of the curved surface body is concave downward; the angle of the extension portion relative to the vertical direction can be changed as the curved surface body switches between the first form and the second form, and the extension portion is always located below the horizontal plane or coincides with the horizontal plane relative to the horizontal plane, thereby enabling the maximum radius of the vertical projection surface of the porous elastic curved tea strainer to change, and the maximum radius of the porous elastic curved tea strainer when the curved surface body is in the second form is larger than that when the curved surface body is in the first form; A clamping portion is arranged on the inner wall of the teapot along the circumferential direction, and the maximum radius of the vertical projection surface of the porous elastic curved tea strainer is changed under the action of an external force, so that the extension portion can be clamped with or separated from the clamping portion.

8. A tea brewing utensil according to claim 7, characterized in that: The extension portion comprises a first extension, which is arranged at intervals along the circumferential edge of the curved surface body; the clamping portion comprises a first protrusion and a second protrusion which are annularly arranged on the circumferential inner wall of the teapot, the inner ring radius R1 of the first protrusion is larger than the inner ring radius R2 of the second protrusion; an annular groove is formed between the first protrusion and the second protrusion; The extension portion and the clamping portion are configured such that: when the curved surface body is in the first form and placed horizontally, the included angle of the first extension relative to the vertical direction is A1, and the radius of the vertical projection surface of the porous elastic curved tea strainer taking the distance from the outer edge of the first extension to the center of the curved surface body is r1; wherein R1>r1 and R2<r1, so that the first extension can be lapped on the second protrusion from top to bottom, or can be taken out from bottom to top and separated from the clamping portion; When the curved surface body is in the second form and placed horizontally, the included angle of the extension portion relative to the vertical direction is A1', and the radius of the vertical projection surface of the porous elastic curved tea strainer taking the distance from the outer edge of the first extension to the center of the curved surface body is r1', A1<A1', r1<r1'; wherein R1<r1' and R2<r1', so that the first extension is clamped in the annular groove, thereby clamping the extension portion and the clamping portion to each other.

9. A tea brewing utensil according to claim 7, characterized in that: The extension portion comprises a second extension and a third extension, the second extension is arranged at intervals along the circumferential direction of the curved surface body, and the third extension is arranged at intervals along the circumferential direction of the curved surface body; the clamping portion comprises a third protrusion annularly arranged on the circumferential inner wall of the teapot, and the inner ring radius of the third protrusion is R3; The outward extension portion and the clamping portion are configured such that: when the curved surface body is in the first form and placed horizontally, an included angle between the second outward extension and the vertical direction is A2, an included angle between the third outward extension and the vertical direction is A3, in the vertical projection plane of the porous elastic curved tea strainer, the distance from the outer edge of the second outward extension to the center of the curved surface body is taken as a radius r2, the distance from the outer edge of the third outward extension to the center of the curved surface body is taken as a radius r3, A2 < A3 and r2 < r3; wherein r2 < R3 < r3, so that the second outward extension can pass over the upper end surface of the third convex ring from top to bottom and the third outward extension can lap-joint on the upper end surface, or the second outward extension can be separated from the third convex ring from bottom to top, so that the outward extension portion and the clamping portion are separated from each other; When the curved surface body is in the second form and placed horizontally, an included angle between the second outward extension and the vertical direction is A2', an included angle between the third outward extension and the vertical direction is A3', in the vertical projection plane of the porous elastic curved tea strainer, the distance from the outer edge of the second outward extension to the center of the curved surface body is taken as a radius r2', the distance from the outer edge of the third outward extension to the center of the curved surface body is taken as a radius r3', A2' < A3', r2' < r3', and r2' > r2, r3' > r3; wherein R3 < r2' < r3', so that the second outward extension can abut against the lower end surface of the third convex ring, the third outward extension can lap-joint on the upper end surface of the third convex ring, so that the outward extension portion and the clamping portion are clamped with each other.

10. A tea brewing utensil according to claim 7, characterized in that: The receding notch is arranged at the center of the curved surface body; or the receding notch is arranged at the edge of the curved surface body.

11. A tea brewing utensil according to claim 7, characterized in that: A punching hole is arranged at a position of the curved surface body close to the outward extension portion; and / or, the filter holes comprise at least two kinds of hole positions with different shapes.

12. A tea brewing utensil according to claim 7, characterized in that: The curved surface body further has a third form, in the third form, the curved surface body is substantially in a planar structure, and the outward extension portion and the curved surface body are substantially in the same plane.

13. A tea brewing apparatus according to claim 7, characterized in that: It further comprises a lid, a first matching portion is arranged on an inner wall of the lid, and the outward extension portion can be clamped with or separated from the first matching portion; and / or, a storage groove is arranged on an outer wall of the teapot, a second matching portion is arranged in the storage groove, and the outward extension portion can be clamped with or separated from the second matching portion.

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