Inner cutter head for bean grinder and bean grinder

Abstract

The utility model relates to the technical field of household appliances, and discloses an inner cutter head for a bean grinder and the bean grinder, the inner cutter head comprises a main body, a plurality of first blades and a plurality of second blades, the first blades are connected to the side surface of the main body at intervals along the circumferential direction of the main body, and the first blades are located at the lower half section of the main body; the first blade comprises cutting edges and thorn-shaped structures, the cutting edges are located at the tail ends of the thorn-shaped structures, the thorn-shaped structures are located at the cutting edges, and a plurality of thorn-shaped structures are distributed on each cutting edge; the multiple second blades are connected to the side surface of the body in the circumferential direction of the body at intervals and located on the upper half section of the body. Through the arrangement, the technical problem that particles formed after beans are ground are large in size due to the fact that the stress direction of the beans is single in the grinding process is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to an inner cutter disc for a bean grinder and the bean grinder. Background Art

[0002] Currently, bean grinders can be used to grind beans, such as coffee beans, so that users can make their own coffee for drinking in daily life.

[0003] In the related art, the bean grinder includes a body and an inner blade disc, which is rotatably connected to the body. The inner blade disc can be manually driven by the user through a joystick or by a motor; the body is provided with a grinding chamber, and the inner blade disc is placed in the grinding chamber. Blades are provided on the outer side of the inner blade disc and the inner wall of the grinding chamber. When the inner blade disc rotates relative to the body, the blades on the inner blade disc and the blades in the grinding chamber can grind the beans in the grinding chamber, and the ground bean powder is discharged from the lower end of the grinding chamber.

[0004] However, the blades on the inner disc are generally sharp strip-shaped, and the blades on the grinding chamber wall are also sharp strip-shaped. The beans are subjected to a relatively single force direction during the grinding process, resulting in larger particles after the beans are ground. Utility Model Content

[0005] The embodiment of the present utility model aims to provide an inner blade disc for a bean grinder and a bean grinder, so as to solve the technical problem that the beans are subjected to a relatively single force direction during the grinding process, resulting in larger particle sizes after the beans are ground.

[0006] The present invention solves the technical problem by adopting the following technical solutions:

[0007] An inner blade disc for a coffee bean grinder is provided, comprising:

[0008] main body;

[0009] a first blade, wherein a plurality of the first blades are connected to the side surface of the main body at intervals along the circumference of the main body, and the first blades are located in the lower half of the main body; the first blade comprises a cutting edge and a thorn-like structure, the cutting edge is located at the end of the thorn-like structure, the thorn-like structure is located at the cutting edge, and a plurality of the thorn-like structures are distributed on each cutting edge;

[0010] A plurality of second blades are connected to the side surface of the main body at intervals along the circumference of the main body, and the second blades are located in the upper half of the main body.

[0011] In some embodiments, each of the blades is provided with a plurality of notches, and the thorn-like structure is formed between two adjacent notches on the same blade.

[0012] In some embodiments, the main body is in the shape of a truncated cone, the top area of ​​the main body is smaller than the bottom area of ​​the main body, one end of the blade faces the top surface of the main body and is located on a busbar of the main body, the other end of the blade faces the bottom surface of the main body and is located on another busbar of the main body, and the blade is in the shape of an arc.

[0013] In some embodiments, the number of the second blades is smaller than the number of the first blades, and the spacing between two adjacent first blades is smaller than the spacing between two adjacent second blades.

[0014] In some embodiments, the number of the second blades is at least ten.

[0015] In other embodiments of the present invention, a coffee bean grinder is provided, comprising any one of the above-mentioned inner cutter discs for coffee bean grinders.

[0016] In some embodiments, the coffee bean grinder further comprises a body and an external blade disc, the external blade disc being mounted on the body, the external blade disc comprising a third blade, the external blade disc being provided with a grinding chamber, a feed port, and a discharge port, wherein from top to bottom, the feed port, the grinding chamber, and the discharge port are arranged in sequence and adjacent ones are interconnected, the feed port passes through the upper end of the external blade disc, and the discharge port passes through the lower end of the external blade disc;

[0017] The inner cutter disc is rotatably mounted on the machine body, the inner cutter disc is located in the grinding chamber, the third blade is connected to the side cavity wall of the grinding chamber, and the third blade is arranged around the circumference of the inner cutter disc.

[0018] In some embodiments, the grinder further comprises an adjustment knob rotatably connected to an outer circumferential side surface of the body, wherein the rotation axis of the adjustment knob is colinear with the rotation axis of the inner blade disc; the adjustment knob is sleeved on the outer blade disc, and the inner surface of the adjustment knob is threadedly connected to the outer surface of the outer blade disc; the body comprises a guide member, the outer blade disc defines a guide groove, and the guide member is inserted into the corresponding guide groove;

[0019] During the rotation of the adjusting knob, the adjusting knob drives the outer cutter disc to move relative to the main body along the direction of the rotation axis of the adjusting knob, and the guide member moves in the guide groove.

[0020] In some embodiments, the outer cutter disc includes at least two side protrusion blocks, and the side protrusion blocks protrude from the outer surface of the outer cutter disc; the inner surface of the adjusting knob is threadedly connected to the side of the side protrusion block that is away from the central axis of the outer cutter disc; all the side protrusion blocks are circumferentially distributed on the outer cutter disc, and the guide groove is formed between two adjacent side protrusion blocks.

[0021] In some embodiments, the main body includes a bottom side surface, the bottom side surface faces the outer cutter disc, the lower end of the bottom side surface is connected to the bottom surface of the main body, the upper end of the bottom side surface faces the top surface of the main body, and the bottom side surface is circumferentially arranged around the main body; the lower end of the blade facing the main body is connected to the upper end of the bottom side surface; in the radial direction of the main body, the first blade is located between the central axis of the main body and the bottom side surface; there is a gap between the bottom side surface and the cavity wall at the bottom of the grinding chamber;

[0022] The outer cutter disc is provided with an inner groove, which is provided on the cavity wall of the grinding cavity and is located at the bottom of the grinding cavity. The grinding cavity is communicated with the gap between two adjacent third blades.

[0023] In some embodiments, there are multiple inner grooves, and all of the inner grooves are evenly distributed circumferentially around the central axis of the grinding chamber.

[0024] Compared with the existing technology, when the bean grinder is grinding beans, the inner blade rotates relative to the outer blade, and the second blade and the third blade first contact the surface of the beans, and the beans are broken into multiple smaller particles under pressure; then the smaller bean particles fall between the first blade and the third blade, and the thorn-like structure on the blade of the first blade will contact and press the smaller bean particles, so that the bean particles are subjected to multi-directional force, and then the bean particles can be ground into finer bean powder; when users drink beverages made from bean powder, the taste will be better. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] One or several embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0026] Figure 1 This is a perspective view of a coffee bean grinder according to one embodiment of the present invention;

[0027] Figure 2 yes Figure 1 A three-dimensional view of the inner burr disc of the medium grinder;

[0028] Figure 3 yes Figure 1 A cross-sectional view of the inner blade of the middle grinder;

[0029] Figure 4 yes Figure 1 A three-dimensional view of the medium grinder's outer burr and adjustment knob separated from each other;

[0030] Figure 5is a cross-sectional view of the inner cutter disc of a coffee bean grinder in another embodiment of the present invention;

[0031] Figure 6 yes Figure 5 A cross-sectional view of the bottom side of the grinder;

[0032] Figure 7 yes Figure 1 A magnified view of the inner groove of the outer burr disc of the medium grinder.

[0033] Reference numerals:

[0034] 100, grinder; 10, inner burr; 12, main body; 122, bottom side; 14, first blade; 142, thorn-like structure; 144, blade; 1442, notch; 16, second blade; 20, body; 22, guide; 30, outer burr; 32, third blade; 322, first section; 324, second section; 34, side protrusion; 301, grinding chamber; 302, feed port; 303, discharge port; 304, guide groove; 305, inner groove; 40, adjustment knob. DETAILED DESCRIPTION

[0035] In order to facilitate the understanding of the present invention, the present invention will be described in more detail below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as "connected" to another element, it can be directly on the other element, or there can be one or more centered elements therebetween. The terms "upper", "lower", "left", "right", "upper end", "lower end", "top" and "bottom" used in this specification indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second" and the like are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0036] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art in the field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0037] The inner blade disc 10 for a coffee bean grinder 100 and the coffee bean grinder 100 provided in the embodiment of the present application will be described in detail below with reference to the drawings throughout the specification through specific embodiments.

[0038] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 In one embodiment of the present invention, a coffee bean grinder 100 is disclosed, comprising an inner cutter disc 10, a body 20 and an outer cutter disc 30. The inner cutter disc 10 comprises a main body 12, a first blade 14 and a second blade 16. A plurality of first blades 14 are connected to the side surface of the main body 12 at intervals along the circumference of the main body 12. The plurality of first blades 14 are distributed on the circumference of the main body 12, and the first blades 14 are located in the lower half of the main body 12; the first blade 14 comprises a blade edge 144 and a thorn-like structure 142, the blade edge 144 is located at the end of the thorn-like structure 142, the thorn-like structure 142 is located at the blade edge 144, and each blade edge 144 is distributed with a plurality of thorn-like structures 142; a plurality of second blades 16 are connected to the side surface of the main body 12 at intervals along the circumference of the main body 12, and the second blades 16 are located in the upper half of the main body 12.

[0039] The outer cutter disc 30 is installed on the fuselage 20. The outer cutter disc 30 includes a third blade 32. The outer cutter disc 30 is provided with a grinding chamber 301, a feed port 302 and a discharge port 303. From top to bottom, the feed port 302, the grinding chamber 301 and the discharge port 303 are arranged in sequence and the adjacent ones are connected to each other. The feed port 302 passes through the upper end of the outer cutter disc 30, and the discharge port 303 passes through the lower end of the outer cutter disc 30.

[0040] The inner cutter disc 10 is rotatably mounted on the body 20 . The inner cutter disc 10 is located in the grinding chamber 301 . The third blade 32 is connected to the side wall of the grinding chamber 301 . The third blade 32 is arranged around the circumference of the inner cutter disc 10 .

[0041] Through the above structure, when the bean grinder 100 is grinding beans, the inner blade 10 rotates relative to the outer blade 30, and the second blade 16 and the third blade 32 first contact the surface of the beans. The beans are crushed into multiple smaller particles under pressure; then the smaller bean particles fall between the first blade 14 and the third blade 32, and the thorn-like structure 142 on the blade 144 of the first blade 14 will contact and press the smaller bean particles, so that the bean particles are subjected to multi-directional forces, and the bean particles can be ground into finer bean powder; when users drink beverages made from bean powder, the taste will be better.

[0042] Specifically, in this embodiment, the thorn-like structures 142 are shaped like a triangular pyramid, with the tips of the thorn-like structures 142 facing the side wall of the grinding chamber 301. The thorn-like structures 142 are evenly distributed from one end of the first blade 14 to the other opposite end of the first blade 14. The blades 144 are located at the ends of the thorn-like structures 142, that is, at the tips of the thorn-like structures 142. The number of second blades 16 is less than the number of first blades 14, and the spacing between adjacent first blades 14 and adjacent second blades 16 is the same. The tips of the thorn-like structures 142 can be tilted downward, and the tilt direction of all the tips remains consistent.

[0043] The body 20 has an overall cylindrical structure, while the inner cutter disc 10 has a frustum-like shape. The shape of the inner cutter disc 10 matches the shape of the grinding chamber 301. The third blade 32 includes a first section 322 and a second section 324, which are arranged sequentially from bottom to top. The position of the first section 322 corresponds to the position of the first blade 14, and the position of the second section 324 corresponds to the position of the second blade 16. Both the first blade 14 and the second blade 16 are tilted relative to the rotation axis of the inner cutter disc 10, and the tilt direction of the upper and lower adjacent first blades 14 is opposite to the tilt direction of the second blade 16. The spacing between the first section 322 and the first blade 14 is smaller than the spacing between the second section 324 and the second blade 16.

[0044] The inner cutter disc 10 can be connected to a rotating shaft, which is located inside the fuselage 20 and is rotatably connected to the fuselage 20 through a bearing; the inner cutter disc 10 is located at one end of the rotating shaft, and the other opposite end of the rotating shaft can be connected to a drive component, which can be a manual rocker or a motor.

[0045] In other embodiments, the thorn-like structure 142 can also be other shapes, such as a conical structure; the number of first blades 14 can also be equal to the number of second blades 16; the inclination direction of the upper and lower adjacent first blades 14 and the inclination direction of the second blades 16 can also be the same.

[0046] In some embodiments, each blade 144 is provided with a plurality of notches 1442 , and a thorn-like structure 142 is formed between two adjacent notches 1442 on the same blade 144 .

[0047] Through the above structure, a notch 1442 is opened on the blade 144 to form a thorn-like structure 142. The notch 1442 can be processed by only processing the blade 144 using processing equipment. The inner cutter disc 10 in this embodiment is easier to produce.

[0048] Specifically, in this embodiment, the notches 1442 on the same blade 144 are evenly distributed from one end of the blade 144 to the other end of the blade 144, and the notches 1442 are shaped like a triangle, so that the thorn-like structure 142 between two adjacent notches 1442 also has a structure similar to a triangle.

[0049] In other embodiments, the notch 1442 may also have other structures, such as a semicircle or an isosceles trapezoid.

[0050] In some embodiments, the main body 12 is in the shape of a truncated cone, the top area of ​​the main body 12 is smaller than the bottom area of ​​the main body 12, one end of the blade 144 faces the top surface of the main body 12 and is located on a generatrix of the main body 12, and the other end of the blade 144 faces the bottom surface of the main body 12 and is located on another generatrix of the main body 12, and the blade 144 is in the shape of an arc.

[0051] Through the above structure, the main body 12 is in the shape of a truncated cone, the top area of ​​the main body 12 is smaller than the bottom area of ​​the main body 12, the first blade 14 is connected to the side surface of the main body 12 at intervals along the circumference of the main body 12, and the blade 144 is arc-shaped; the tangential direction of the blade 144 is different from one end of the main body 12 to the other opposite end of the main body 12, so that the same blade 144 has different angles when contacting beans at different heights. The multiple thorn-like structures 142 on the blade 144 can contact and press the beans in different directions, so that the beans can be ground into finer particles.

[0052] Specifically, in this embodiment, the rotation axis of the main body 12 is arranged perpendicular to the horizontal plane. From a perspective perpendicular to the horizontal plane, the blade 144 has an arc-shaped structure; from a perspective parallel to the horizontal plane, the blade 144 also has an arc-shaped structure.

[0053] In other embodiments, the blade 144 may be arc-shaped only in a viewing angle perpendicular to the horizontal plane, and be straight in a viewing angle parallel to the horizontal plane.

[0054] In some embodiments, the number of the second blades 16 is smaller than the number of the first blades 14 , and the spacing between two adjacent first blades 14 is smaller than the spacing between two adjacent second blades 16 .

[0055] With the above structure, when beans fall into the grinding chamber 301 through the feed port 302, the beans are relatively large in size, and the distance between two adjacent second blades 16 is relatively large, thereby providing sufficient space for the whole beans to fall between the second blade 16 and the third blade 32. The second blade 16 and the third blade 32 grind the whole beans into a plurality of smaller bean particles; the distance between two adjacent first blades 14 is relatively small, and when the smaller bean particles fall between the first blade 14 and the third blade 32, the first blade 14 can more fully press against the surface of the bean particles, thereby grinding the beans into finer bean powder.

[0056] In addition, the second blade 16 and the third blade 32 first grind the larger whole beans to prevent the whole beans from directly contacting the thorn structure 142 on the first blade 14, thereby reducing the pressure on the thorn structure 142 during operation and improving the service life of the inner blade 10.

[0057] Specifically, in this embodiment, the number of first blades 14 is an integer multiple of the number of second blades 16, and the thickness of the first blades 14 is greater than the thickness of the second blades 16. In other embodiments, the number of first blades 14 may simply be greater than the number of second blades 16; and the thickness of the first blades 14 may be the same as the thickness of the second blades 16.

[0058] In some embodiments, the number of second blades 16 is at least ten.

[0059] Through the above structure, when the number of the second blades 16 is at least ten, the second blades 16 are arranged more densely, and the distance between two adjacent second blades 16 is smaller. Therefore, when the beans enter the grinding chamber 301, the second blades 16 can cut the beans into smaller bean particles, and then the first blade 14 cuts the smaller bean particles into bean powder; when the smaller bean particles contact the first blade 14, the pressure of the bean particles on the first blade 14 is smaller, and thus the first blade 14 saves more effort when cutting the smaller bean particles.

[0060] Specifically, in this embodiment, the number of the second blades 16 is ten. In other embodiments, the number of the second blades 16 can also be other, such as twelve.

[0061] In some embodiments, the grinder 100 further includes an adjustment knob 40, which is rotatably connected to the outer circumferential side of the body 20, and the rotation axis of the adjustment knob 40 is collinear with the rotation axis of the inner blade disc 10; the adjustment knob 40 is sleeved on the outer blade disc 30, and the inner surface of the adjustment knob 40 is threadedly connected to the outer surface of the outer blade disc 30; the body 20 includes a guide member 22, and the outer blade disc 30 is provided with a guide groove 304, and the guide member 22 is embedded in the corresponding guide groove 304.

[0062] During the rotation of the adjusting knob 40 , the adjusting knob 40 drives the outer cutter disc 30 to move relative to the main body 12 along the direction of the rotation axis of the adjusting knob 40 , and the guide member 22 moves in the guide groove 304 .

[0063] Through the above structure, the user turns the adjustment knob 40, and the adjustment knob 40 rotates relative to the outer blade disc 30. At the same time, the guide member 22 abuts against the groove wall of the guide groove 304 and guides and limits the outer blade disc 30. The outer blade disc 30 moves upward or downward relative to the body 20 to adjust the distance between the first blade 14 and the third blade 32, and also adjusts the distance between the second blade 16 and the third blade 32, thereby adjusting the size of the particles formed after the beans are ground.

[0064] Specifically, the adjusting knob 40 can be rotatably connected to the body 20 through a bearing. The outer surface of the adjusting knob 40 is protruded from the outside of the body 20, and the adjusting knob 40 is engraved with a scale. The scale on the adjusting knob 40 is used for customers to observe and understand the size of the ground bean particles.

[0065] In some embodiments, the outer cutter disc 30 includes at least two side protrusion blocks 34, which protrude from the outer surface of the outer cutter disc 30; the inner surface of the adjusting knob 40 is threadedly connected to the side of the side protrusion block 34 that is away from the central axis of the outer cutter disc 30; all the side protrusion blocks 34 are circumferentially distributed on the outer cutter disc 30, and the guide groove 304 is formed between two adjacent side protrusion blocks 34.

[0066] Through the above structure, a guide groove 304 is formed between two adjacent side protrusion blocks 34, and the guide member 22 is embedded in the corresponding guide groove 304. The guide member 22 can simultaneously abut against the outer surface of the outer blade disc 30 and the two adjacent side protrusion blocks 34; so that when the outer blade disc 30 moves in the vertical direction relative to the main body 12, the outer blade disc 30 can be more stable, thereby improving the grinding accuracy of the beans.

[0067] Specifically, in this embodiment, the guide member 22 can be an arc-shaped block structure, and the side protrusion block 34 is also an arc-shaped block structure. The height of the side protrusion block 34 is less than the height of the guide member 22. The number of the side protrusion blocks 34 is three, and the spacing between two adjacent side protrusion blocks 34 is equal, so that the size and shape of each guide member 22 can be kept consistent.

[0068] Please refer to Figure 5 and Figure 6 In some embodiments, the main body 12 includes a bottom side surface 122, the bottom side surface 122 faces the outer cutter disc 30, the lower end of the bottom side surface 122 is connected to the bottom surface of the main body 12, the upper end of the bottom side surface 122 faces the top surface of the main body 12, and the bottom side surface 122 is circumferentially arranged around the main body 12; the blade 144 is connected to the upper end of the bottom side surface 122 facing the lower end of the main body 12; in the radial direction of the main body 12, the first blade 14 is located between the central axis of the main body 12 and the bottom side surface 122; there is a gap between the bottom side surface 122 and the cavity wall at the bottom of the grinding cavity 301.

[0069] The outer blade disc 30 defines an inner groove 305 , which is formed in the wall of the grinding chamber 301 and located at the bottom of the grinding chamber 301 . The inner groove 305 communicates with the gap between two adjacent third blades 32 .

[0070] This structure creates a gap between the bottom side 122 and the bottom wall of the grinding chamber 301, preventing the first blade 14 from directly contacting the third blade 32 and potentially blocking the inner blade disc 10. Furthermore, vertically, the gap between the bottom side 122 and the bottom wall of the grinding chamber 301 will also vary depending on the spacing between the inner blade disc 10 and the outer blade disc 30. This allows the user to adjust the height of the outer blade disc 30 to adjust the size of the ground bean powder.

[0071] In addition, the inner groove 305 can allow the bean powder to flow out of the grinding chamber 301, so as to avoid the gap between the bottom side surface 122 and the cavity wall at the bottom of the grinding chamber 301 being too small, and the bean powder flowing out of the grinding chamber 301 being too slow; and the inner groove 305 is connected to the gap between the two adjacent third blades 32, and the size of the inner groove 305 is adapted to the gap between the two adjacent third blades 32 to limit the flow of larger bean particles out of the grinding chamber 301 through the inner groove 305.

[0072] Specifically, in this embodiment, the bottom side surface 122 is a smooth curved structure; when viewed from above, the bottom side surface 122 is a circular ring structure, and the inner groove 305 is a structure similar to a semicircle; and the bottom side surface 122 is arranged perpendicular to the horizontal plane.

[0073] In other embodiments, when viewed from a top view, the inner groove 305 may also be in other shapes, such as a triangle or a rectangle.

[0074] Please refer to Figure 7 In some embodiments, there are multiple inner grooves 305 , and all inner grooves 305 are evenly distributed circumferentially around the central axis of the grinding chamber 301 .

[0075] Through the above structure, when the bean powder flows out of the grinding chamber 301 through the inner groove 305, the bean powder can be evenly distributed around the discharge port 303; to avoid local accumulation of bean powder, resulting in the gap between the bottom side surface 122 and the cavity wall at the bottom of the grinding chamber 301 being blocked by bean powder.

[0076] Specifically, two adjacent inner grooves 305 are in close contact with each other.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Under the idea of ​​the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above. For the sake of simplicity, they are not provided in detail. Although the present invention is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An inner cutter disc for a coffee bean grinder, characterized in that: include: main body; a first blade, wherein a plurality of the first blades are connected to the side surface of the main body at intervals along the circumference of the main body, and the first blades are located in the lower half of the main body; The first blade includes a blade and a thorn-like structure, wherein the blade is located at the end of the thorn-like structure, and the thorn-like structure is located at the blade, and a plurality of thorn-like structures are distributed on each blade; A plurality of second blades are connected to the side surface of the main body at intervals along the circumference of the main body, and the second blades are located in the upper half of the main body.

2. The inner cutter disc according to claim 1, characterized in that: A plurality of notches are formed on each blade, and the thorn-like structure is formed between two adjacent notches on the same blade.

3. The inner cutter disc according to claim 1, characterized in that: The main body is in the shape of a truncated cone, the top area of ​​the main body is smaller than the bottom area of ​​the main body, one end of the blade faces the top surface of the main body and is located on a generatrix of the main body, the other end of the blade faces the bottom surface of the main body and is located on another generatrix of the main body, and the blade is in the shape of an arc.

4. The inner cutter disc according to claim 3, characterized in that: The number of the second blades is smaller than the number of the first blades, and the distance between two adjacent first blades is smaller than the distance between two adjacent second blades.

5. The coffee bean grinder according to claim 4, characterized in that: The number of the second blades is at least ten.

6. A coffee bean grinder, characterized in that: The invention comprises the inner cutter disc according to any one of claims 1 to 5.

7. The coffee bean grinder according to claim 6, characterized in that: The machine further comprises a body and an outer cutter disc, wherein the outer cutter disc is mounted on the body, the outer cutter disc comprises a third blade, the outer cutter disc is provided with a grinding chamber, a feed port and a discharge port, wherein from top to bottom, the feed port, the grinding chamber and the discharge port are arranged in sequence and adjacent ones are connected to each other, the feed port passes through the upper end of the outer cutter disc, and the discharge port passes through the lower end of the outer cutter disc; The inner cutter disc is rotatably mounted on the machine body, the inner cutter disc is located in the grinding chamber, the third blade is connected to the side cavity wall of the grinding chamber, and the third blade is arranged around the circumference of the inner cutter disc.

8. The coffee bean grinder according to claim 7, characterized in that: The machine body further includes an adjusting knob, the adjusting knob being rotatably connected to the outer circumferential side surface of the machine body, the rotation axis of the adjusting knob being colinear with the rotation axis of the inner cutter disc; the adjusting knob being sleeved on the outer cutter disc, the inner surface of the adjusting knob being threadedly connected to the outer surface of the outer cutter disc; the machine body includes a guide member, the outer cutter disc is provided with a guide groove, and the guide member is embedded in the corresponding guide groove; During the rotation of the adjusting knob, the adjusting knob drives the outer cutter disc to move relative to the main body along the direction of the rotation axis of the adjusting knob, and the guide member moves in the guide groove.

9. The coffee bean grinder according to claim 8, characterized in that: The outer cutter disc includes at least two side protrusion blocks, which protrude from the outer surface of the outer cutter disc; the inner surface of the adjusting knob is threadedly connected to the side of the side protrusion block that is away from the central axis of the outer cutter disc; all the side protrusion blocks are circumferentially distributed on the outer cutter disc, and the guide groove is formed between two adjacent side protrusion blocks.

10. The coffee bean grinder according to claim 8, characterized in that: The main body includes a bottom side surface, the bottom side surface faces the outer cutter disc, the lower end of the bottom side surface is connected to the bottom surface of the main body, the upper end of the bottom side surface faces the top surface of the main body, and the bottom side surface is circumferentially arranged around the main body; the lower end of the blade facing the main body is connected to the upper end of the bottom side surface; in the radial direction of the main body, the first blade is located between the central axis of the main body and the bottom side surface; a gap is formed between the bottom side surface and the cavity wall at the bottom of the grinding chamber; The outer cutter disc is provided with an inner groove, which is provided on the cavity wall of the grinding cavity and is located at the bottom of the grinding cavity. The grinding cavity is communicated with the gap between two adjacent third blades.

11. The coffee bean grinder according to claim 10, characterized in that: There are multiple inner grooves, and all of the inner grooves are evenly distributed circumferentially around the central axis of the grinding chamber.

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