A coffee grinder

Abstract

A coffee grinder includes a main unit with a mounting hole on its top. A top cover is provided covering the mounting hole, and a bean hopper assembly is rotatably mounted on the top cover. A blade assembly is connected to the bottom of the top cover via a lifting assembly, and the bean hopper assembly and the blade assembly are conductively connected. A retaining ring is installed at the bottom of the bean hopper assembly, and the retaining ring is connected downward to the lifting assembly. Rotating the bean hopper assembly drives the lifting assembly to rotate, thereby adjusting the gap of the blade assembly. The retaining ring has an external snap fastener that engages with an external snap groove on the top cover. The advantages of this invention are: the rotation of the bean hopper assembly drives the rotation of the lifting assembly, making adjustment convenient, avoiding the interference problems of traditional adjustments, and improving the user experience.

Description

Technical Field

[0001] This utility model relates to the field of coffee machine technology, specifically a coffee grinder. Background Technology

[0002] As a key piece of equipment in coffee making, the performance and user experience of a coffee grinder directly impact the quality of the coffee. With consumers increasingly demanding personalized coffee flavors, the ability to adjust the grind size has become an indispensable component of coffee grinders. Most coffee grinders on the market use an adjustment mechanism to adjust the blade gap between the upper and lower grinding discs. The adjustment wheel of this mechanism is usually located at the bottom of the bean hopper. Since the hopper is typically large and used to hold coffee beans, when users need to adjust the grind size, the adjustment tool or the user's hand will interfere with the bottom of the hopper. This not only makes the adjustment difficult and cumbersome but also requires the user to bend over or tilt, significantly reducing the user experience and making operation particularly inconvenient.

[0003] Secondly, if the connection between the adjusting mechanism and the grinding disc is not tight enough or the transmission gap is too large, play may occur during the adjustment process, affecting the accuracy of coffee powder coarseness adjustment. Users may need to try multiple times to achieve the desired grinding effect, increasing the complexity of operation.

[0004] Furthermore, after prolonged use, some adjustment mechanisms may become unstable due to wear or loosening, causing deviations in coffee grind size during use and affecting the consistency of the coffee output. Moreover, traditional grinders and adjustment mechanisms typically use a fixed connection between components. After long-term use, small amounts of coffee grounds and grease may remain on the grinder. This fixed connection not only makes cleaning difficult but may also affect the hygiene and flavor of the coffee due to residue, and even corrode the grinder, reducing its lifespan. Therefore, further improvements are necessary. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a coffee grinder with a simple structure, low manufacturing cost, and the ability to adjust the blade gap by rotating the housing. The adjustment is convenient, precise, stable, and easy for users to clean and maintain.

[0006] The purpose of this utility model is achieved by the following method: a coffee grinder includes a main unit, a mounting hole on the top of the main unit, a top cover covering the mounting hole, and a bean hopper assembly rotatably mounted on the top cover. A blade assembly is connected to the bottom of the top cover via a lifting assembly, and the bean hopper assembly and the blade assembly are conductively connected. A fixing ring is installed at the bottom of the bean hopper assembly, and the fixing ring is connected downwards to the lifting assembly. Rotating the bean hopper assembly causes the lifting assembly to rotate, thereby adjusting the gap of the blade assembly. The fixing ring has an external snap fastener that engages with an external snap groove on the top cover.

[0007] The bean box assembly comprises, from top to bottom, a box body, a baffle seat, and a locking cover. The locking cover is inserted into the bottom of the box body and clamps the baffle seat between the box body and the locking cover. The inner wall of the fixing ring is provided with a limiting groove and a movable groove. The baffle seat is fixedly connected to the limiting groove and is integrated with the fixing ring. Several rotating grooves are opened through the baffle seat. When the box body is rotated, the locking cover rotates in the rotating grooves. The upper baffle across the middle of the box body overlaps with the lower baffle in the middle of the baffle seat, and the box body opens. The cylindrical surface of the locking cover is provided with an inner snap groove and an inner movable snap fastener on the inner wall of the fixing ring. The locking cover is connected to the inner wall of the movable groove. When the box body continues to rotate, the baffle seat rotates synchronously through the fixing ring. The outer movable snap disengages from the outer snap groove, and the box body is always in the open state. Several adjusting posts protrude from the bottom of the fixing ring. The adjusting posts are inserted into the adjusting holes of the lifting assembly. When the fixing ring rotates, the lifting assembly rotates synchronously.

[0008] The bottom of the box body has a protrusion forming several positioning posts, and the lock cover has several positioning holes through it. The positioning posts are inserted into the positioning holes to connect the box body and the lock cover as one unit. The positioning posts are inserted across the rotating groove and rotate along the rotating groove.

[0009] The locking cover has two symmetrically protruding lower connecting platforms on its cylindrical surface; the baffle seat has two symmetrically protruding upper connecting platforms on its cylindrical surface, and the lower connecting platforms are similar in shape to the upper connecting platforms; the limiting groove is designed to be similar in shape to the lower connecting platforms.

[0010] The inner wall of the top cover is provided with an arc-shaped boss, and the outer buckle groove is a groove provided on the arc-shaped boss; the outer snap fastener presses against the arc-shaped boss.

[0011] The inner wall of the top cover is provided with an outer limiting rib, and correspondingly, the outer cylindrical surface of the fixing ring is provided with an inner limiting rib. The inner limiting rib is connected to the outer limiting rib to limit the rotation angle of the fixing ring.

[0012] The lifting assembly includes a gear shifting wheel, the end face of which is recessed with several adjustment holes, and the adjustment post is inserted into the adjustment holes; the cutting tool assembly includes an upper grinding disc and a lower grinding disc, the lower grinding disc being mounted on the drive motor of the main unit.

[0013] The lifting assembly also includes a lifting platform and an upper grinding disc seat that are nested inside the gear shifting wheel, with the upper grinding disc mounted on the upper grinding disc seat.

[0014] The outer wall of the upper grinding disc seat has several protruding docking platforms. Correspondingly, the inner wall of the lifting platform is recessed to form a docking groove. The docking platforms are rotatably connected to the docking groove. The upper grinding disc is detachably installed in the gear adjusting wheel.

[0015] The inner wall of the gear shifting wheel is recessed with a threaded rotating groove, and the outer cylindrical surface of the lifting platform is provided with several threaded bosses. The threaded bosses are screwed into the threaded rotating groove. When the gear shifting wheel rotates, it drives the upper grinding disc to move axially up and down through the lifting platform, thereby adjusting the gap between the upper and lower grinding discs.

[0016] The beneficial effects of this utility model are: 1. Simple structure, low manufacturing cost, and improved market competitiveness.

[0017] 2. The lifting component can be driven to rotate by rotating the bean box component, making the adjustment operation convenient and avoiding the interference problems of traditional adjustment, thus improving the user experience.

[0018] 3. Utilizing threaded transmission, the adjustment precision is high, the adjustment positioning is accurate, ensuring the accuracy of tool clearance adjustment and stable and reliable transmission.

[0019] 4. The components are connected and installed in a detachable manner, which facilitates internal cleaning and maintenance by the user and extends the service life. Attached Figure Description

[0020] Figure 1 This is a rendering of the final assembly of this utility model.

[0021] Figure 2 This is an exploded view of the bean box assembly and fixing ring in this utility model.

[0022] Figure 3 This is an exploded view of the structure of the fixing ring and the top cover seat in this utility model.

[0023] Figure 4 This is a schematic diagram of the internal structure of the top cover seat in this utility model.

[0024] Figure 5 This is a schematic diagram of the closed state of the housing in this utility model.

[0025] Figure 6 This is a schematic diagram of the box in the open state of this utility model.

[0026] Figure 7 This is a schematic diagram of the adjustment state of the lifting component in this utility model.

[0027] Figure 8 This is a cross-sectional view of the bean box assembly in this utility model.

[0028] Figure 9 This is a schematic diagram of the closed state of the bean box assembly in this utility model.

[0029] Figure 10 This is a schematic diagram of the bean box assembly in the open state of this utility model.

[0030] Figure 11 This is an exploded view of the bean box assembly in this utility model.

[0031] Figure 12 This is an exploded view of the structure of the baffle seat and the lock cover in this utility model.

[0032] Figure 13 This is a schematic diagram of the internal structure of the fixing ring in this utility model.

[0033] Figure 14 This is a schematic diagram of the external structure of the fixing ring in this utility model.

[0034] Figure 15 This is a structural cross-sectional view of the lifting assembly and the cutting tool assembly in this utility model.

[0035] Figure 16 This is an exploded view of the lifting assembly and the cutting tool assembly in this utility model. Detailed Implementation

[0036] The present invention will be further described in detail below with reference to the accompanying drawings. A coffee grinder includes a main unit 1, the top of which has a mounting hole, and a top cover 2 is provided covering the mounting hole. A bean hopper assembly 4 is rotatably mounted on the top cover 2. A blade assembly 6 is connected to the bottom of the top cover 2 via a lifting assembly 5, and the bean hopper assembly 4 is conductively connected to the blade assembly 6. A fixing ring 3 is installed at the bottom of the bean hopper assembly 4, and the fixing ring 3 is connected downward to the lifting assembly 5. Rotating the bean hopper assembly 4 causes the lifting assembly 5 to rotate, thereby adjusting the gap of the blade assembly 6. The fixing ring 3 is provided with an external snap fastener 31, which is engaged with an external snap groove 21 provided on the top cover 2.

[0037] like Figure 1 , Figure 2 , Figure 15As shown: In this coffee machine, a mounting hole is provided on the top of the main unit, and the top cover is installed over this mounting hole. The bean hopper assembly is rotatably connected to the top of the top cover, and the bean hopper assembly is used to hold coffee beans. Below the top cover, a lifting assembly is connected to the blade assembly. Coffee beans enter the working range of the blade assembly through the bean hopper assembly, where the blade assembly grinds the coffee beans. The lifting assembly is driven by the bean hopper assembly. When the user rotates the bean hopper assembly, because the fixing ring is connected to the bottom of the bean hopper assembly, the bean hopper assembly synchronously drives the fixing ring to rotate. Since the lifting assembly is also connected to the fixing ring, the rotation of the fixing ring drives the lifting assembly to rotate synchronously, thus converting the rotational motion of the lifting assembly into the linear motion of the blade assembly. This achieves the purpose of adjusting the gap of the blade assembly, thereby adjusting the coarseness of the coffee powder. Furthermore, an external snap fastener is provided on the fixing ring, which engages with the external snap groove on the top cover, ensuring the initial position locking and stable fit between the fixing ring and the top cover.

[0038] Unlike traditional side-wall adjustment methods, this coffee machine combines the adjustment of coffee powder coarseness with the rotation of the bean hopper assembly. Users can directly rotate the bean hopper assembly for more convenient and intuitive adjustment without having to bend over or avoid obstacles. This effectively avoids interference between the hands and the bean hopper assembly during operation, significantly improving the user experience and ease of operation, simplifying the operation process, and making the coffee grinder more user-friendly.

[0039] The bean box assembly 4, from top to bottom, includes a box body 41, a baffle seat 42, and a locking cover 43. The locking cover 43 is inserted into the bottom of the box body 41 and clamps the baffle seat 42 between the box body 41 and the locking cover 43. The inner wall of the fixing ring 3 is provided with a limiting groove 32 and a movable groove 33. The baffle seat 42 is fixedly connected in the limiting groove 32 and is integrated with the fixing ring 3. Several rotating grooves 421 are opened through the baffle seat 42. When the box body 41 is rotated, the locking cover 43 rotates in the rotating grooves 421. The upper baffle 411 spans the middle of the box body 41 and the middle of the baffle seat 42. The lower baffle 422 is stacked, and the box 41 is opened; the cylindrical surface of the lock cover 43 is provided with an inner buckle groove 431 that is engaged with the inner movable buckle 34 of the inner wall of the fixing ring 3. The lock cover 43 is connected to the inner wall of the movable groove 33. As the box 41 continues to rotate, the baffle seat 42 is driven to rotate synchronously through the fixing ring 3. The outer movable buckle 31 is disengaged from the outer buckle groove 21, and the box 41 is always in the open state; several adjusting columns 35 are protruding from the bottom of the fixing ring 3. The adjusting columns 35 are inserted into the adjusting holes 511 of the lifting component 5. When the fixing ring 3 rotates, it drives the lifting component 5 to rotate synchronously.

[0040] The internal structure of the bean box assembly includes, from top to bottom, a box body, a baffle seat, and a locking cover. The locking cover is inserted into the bottom of the box body, clamping the baffle seat between the box body and the locking cover, forming a compact whole. The baffle seat is fixedly connected in the limiting groove of the fixing ring, and moves synchronously with the fixing ring as a whole, while the locking cover is movably connected in the movable groove of the fixing ring.

[0041] like Figure 5 , Figure 9 , Figure 10 As shown: When the user rotates the chamber, the chamber causes the locking cover to rotate as well. The locking cover slides within the movable groove, while the fixing ring and the baffle seat remain relatively stationary without displacement. The chamber guides the locking cover to rotate within the rotating groove of the baffle seat, causing the upper baffle in the middle of the chamber and the lower baffle in the middle of the baffle seat to overlap, thus opening the chamber and connecting it to the cutting tool assembly. This allows the coffee beans to fall smoothly into the cutting tool assembly for grinding.

[0042] like Figure 6 As shown: Furthermore, an inner snap groove is provided on the cylindrical surface of the lock cover, and an inner snap is provided on the inner wall of the fixing ring. When the box is in the fully open state, the inner snap groove and the inner snap are engaged, so that the lock cover is pressed against the inner wall of the movable groove, and the various parts of the bean box assembly are in a fixed whole state.

[0043] like Figure 7 As shown: At this point, continuing to rotate the chamber causes the locking force of the lid to be transmitted to the baffle seat via the fixing ring, driving the baffle seat to rotate synchronously. This forces the initially locked outer latch to disengage from the outer latch groove, thus completely releasing the bean hopper assembly from its restraints. Within a certain angle range, the chamber remains open regardless of whether the bean hopper assembly is rotated clockwise or counterclockwise. This facilitates the addition of coffee beans or cleaning of the interior, effectively solving the cleaning difficulties in existing technologies and ensuring the coffee machine is always in a clean and hygienic working environment, extending its lifespan. Furthermore, the fixing ring is now rotatable, and its bottom protrudes an adjusting post that connects to the adjusting hole of the lifting assembly. The rotation of the fixing ring synchronously drives the lifting assembly to rotate, thereby achieving the purpose of driving the lifting assembly by rotating the bean hopper assembly and adjusting the gap of the cutter assembly.

[0044] By rotating the bean box in stages, users can control the bean box components more flexibly. Users can choose different opening angles according to their needs, improving ease of use. Combining the opening function of the bean box components with the rotation operation of the bean box itself achieves a high degree of functional integration, reduces additional operating parts, and makes the product structure more compact and simple.

[0045] The bottom of the housing 41 has a protrusion forming several positioning posts 412. The lock cover 43 has several positioning holes 432. The positioning posts 412 are inserted into the positioning holes 432, connecting the housing 41 and the lock cover 43 into one unit. The positioning posts 412 are inserted across the rotating groove 421 and rotate along the rotating groove 421.

[0046] like Figure 8 , Figure 11 As shown: A positioning post is formed by a protrusion at the bottom of the cabinet. A positioning hole is provided through the lock cover corresponding to this positioning post. The positioning post is inserted into the positioning hole to connect the cabinet and the lock cover as a whole, ensuring the connection strength and stability. Secondly, the positioning post spans the rotation groove of the baffle seat. When the user rotates the cabinet, the positioning post rotates along the rotation groove, guiding the lock cover to rotate precisely within the groove. This ensures the correct and stable movement trajectory of the lock cover during opening or adjustment of the cabinet, preventing loosening or displacement deviation. It plays a guiding role, making the cabinet rotation operation smoother and more stable. This indirectly ensures the precise execution of subsequent operations such as the overlapping of the upper and lower baffles and the disengagement of the external latch, improving the reliability of the structure.

[0047] The locking cover 43 has two symmetrically protruding lower connecting platforms 433 on its cylindrical surface; the baffle seat 42 has two symmetrically protruding upper connecting platforms 423 on its cylindrical surface, and the lower connecting platforms 433 are similar in shape to the upper connecting platforms 423; the limiting groove 32 is designed to be similar in shape to the lower connecting platforms 433.

[0048] like Figure 11 , Figure 13 As shown: Two lower connecting platforms are symmetrically arranged on the cylindrical surface of the lock cover, and two upper connecting platforms are symmetrically arranged on the cylindrical surface of the baffle seat. The upper connecting platforms are similar in shape to the lower connecting platforms, ensuring that the lock cover and the baffle seat can generate a set linkage when rotating, which facilitates the subsequent driving of the lifting component. Furthermore, the limiting groove of the fixing ring is designed with a similar shape to the lower connecting platforms, ensuring that the baffle seat and the fixing ring can be limited at specific positions, ensuring that the rotation of the fixing ring can synchronously drive the baffle seat to rotate.

[0049] The inner wall of the top cover 2 is provided with an arc-shaped boss 22, and the outer buckle groove 21 is a groove provided on the arc-shaped boss 22; the outer snap buckle 31 presses against the arc-shaped boss 22.

[0050] like Figure 3 , Figure 4As shown: The inner wall of the top cover seat has an arc-shaped protrusion, and the outer locking grooves are designed on this arc-shaped protrusion. Before the outer snap fastener of the fixing ring engages with the outer locking groove, it presses against this arc-shaped protrusion. Utilizing the reverse pressing of the arc-shaped protrusion, the outer snap fastener stores a certain amount of elastic potential energy. When the outer snap fastener engages with the outer locking groove, the stored elastic potential energy is released, realizing the smooth insertion and locking of the outer snap fastener. It also provides a certain guiding effect when the outer snap fastener disengages, improving the smoothness and reliability of the connection.

[0051] The inner wall of the top cover 2 is provided with an outer limiting rib 23. Correspondingly, the outer cylindrical surface of the fixing ring 3 is provided with an inner limiting rib 36. The inner limiting rib 36 is connected to the outer limiting rib 23 to limit the rotation angle of the fixing ring 3.

[0052] like Figure 4 , Figure 7 , Figure 14 To precisely control the fixed ring, an outer limiting rib is provided on the inner wall of the top cover seat, and an inner limiting rib is provided on the outer cylindrical surface of the fixed ring. When the fixed ring rotates, the inner limiting rib contacts the outer limiting rib, thereby preventing further rotation of the fixed ring and achieving the purpose of limiting the rotation angle of the fixed ring. This effectively prevents excessive rotation of the chamber, thereby effectively limiting the adjustment range of the coffee powder coarseness, avoiding user misoperation that causes the grinding disc to move too close or too far away, protecting the blade assembly, and ensuring that the grinding effect is within a reasonable range.

[0053] The lifting assembly 5 includes a gear shifting wheel 51, and the end face of the gear shifting wheel 51 is recessed with a plurality of adjustment holes 511. The adjustment column 35 is inserted and clipped into the adjustment holes 511. The cutting tool assembly 6 includes an upper grinding disc 61 and a lower grinding disc 62, and the lower grinding disc 62 is mounted on the drive motor 11 of the main unit 1.

[0054] like Figure 15 , Figure 16 As shown: In the internal structure of the lifting assembly, the end face of the adjusting wheel is recessed with an adjusting hole that aligns with the adjusting post of the fixed ring. When the fixed ring rotates, the adjusting wheel rotates synchronously via the adjusting post. The rotation is transmitted through the adjusting post and adjusting hole, ensuring a clear and precise transmission path for accurate and reliable adjustment. Secondly, the lower grinding disc of the tool assembly is connected to the drive motor, while the upper grinding disc is connected to the lifting assembly.

[0055] The lifting assembly 5 also includes a lifting platform 52 and an upper grinding disc 61 seat 53 enclosed within the gear shifting wheel 51, with the upper grinding disc 61 mounted on the upper grinding disc 61 seat 53.

[0056] like Figure 15 , Figure 16As shown: The upper grinding disc seat of the lifting assembly is connected to the upper grinding disc of the tool assembly. The drive motor is responsible for driving the lower grinding disc to rotate. The upper grinding disc is responsible for linkage with the lifting assembly to adjust the tool gap. The structure is clear and the transmission method is simple.

[0057] The outer wall of the upper grinding disc 61 seat 53 has several protruding docking platforms 531. Correspondingly, the inner wall of the lifting platform 52 is recessed to form a docking groove 521. The docking platforms 531 are rotatably connected to the docking groove 521. The upper grinding disc 61 is detachably installed in the gear shifting wheel 51.

[0058] like Figure 16 As shown: The outer wall of the upper grinding disc holder has several protruding docking platforms, and the inner wall of the lifting platform is correspondingly recessed to form docking grooves. The docking platforms are inserted into the docking grooves by rotation, allowing the upper grinding disc holder to be detachably installed. Users can easily remove the upper grinding disc holder and upper grinding disc for thorough cleaning of the blade assembly and its surroundings, preventing coffee grounds from accumulating and affecting hygiene and flavor. This also facilitates the replacement and maintenance of the blade assembly. Regular cleaning and maintenance of the coffee machine's internal components can effectively extend its service life, simplify daily maintenance procedures, and enhance the user experience.

[0059] The inner wall of the gear shifting wheel 51 is recessed with a threaded rotating groove 512, and the outer cylindrical surface of the lifting platform 52 is provided with a plurality of threaded bosses 522. The threaded bosses 522 are screwed into the threaded rotating groove 512. When the gear shifting wheel 51 rotates, the upper grinding disc 61 is driven to move axially up and down through the lifting platform 52 to adjust the gap between the upper grinding disc 61 and the lower grinding disc 62.

[0060] like Figure 16 As shown: the gear shifting wheel has a threaded rotating groove, and the lifting platform has a threaded boss. Through the helical engagement of the threaded rotating groove and the threaded boss, the rotational motion of the gear shifting wheel is precisely converted into the linear motion of the lifting platform. Since the upper grinding disc seat is connected to the lifting platform, the axial movement of the lifting platform will drive the upper grinding disc seat to move axially up and down as well, thus achieving fine adjustment of the gap between the upper and lower grinding discs. The threaded transmission mechanism has high transmission accuracy, enabling precise adjustment of the grinding disc gap to meet users' precise requirements for coffee powder coarseness. Furthermore, the thread has good self-locking properties; once adjusted, it can stably maintain the grinding disc gap, preventing drift due to vibration or other factors during use, ensuring the consistency of the ground coffee powder coarseness. The threaded transmission also has low friction, making the rotation adjustment process of the gear shifting wheel smoother and providing a better user experience.

[0061] In summary, when the user rotates the bean container assembly, the fixing ring rotates accordingly, and further rotates through the adjusting pin inserted into the adjusting hole of the adjusting wheel in the lifting assembly, thereby driving the adjusting wheel to rotate synchronously. A threaded rotating groove is provided on the inner wall of the adjusting wheel, which is screwed into a threaded boss on the outer cylindrical surface of the lifting platform. Therefore, the rotation of the adjusting wheel is precisely converted into the axial up-and-down movement of the lifting platform. Since the upper grinding disc seat is mounted on the lifting platform, this axial movement directly adjusts the gap between the upper grinding disc and the lower grinding disc on the drive motor below, thus achieving the adjustment of the coffee powder coarseness. The adjustment method in this invention moves the operating interface to the bean container assembly, avoiding the interference problem between traditional adjustments and the bean container assembly, greatly improving the convenience of operation and user experience. At the same time, the threaded drive and the cooperation of the adjusting pin and adjusting groove ensure high precision and stability of the adjustment. Furthermore, this invention also cleverly designs an opening and locking mechanism for the bean container assembly: the bean container assembly consists of a box body, a baffle seat, and a locking cover. During the initial rotation of the chamber, the upper and lower baffles overlap, opening the chamber, guided by the positioning pin in the rotating groove and the linkage between the chamber and the locking cover. As the chamber continues to rotate, the inner locking groove on the locking cover engages with the inner snap-fit ​​on the inner wall of the fixing ring, and the locking cover is connected to the movable groove of the fixing ring. This further rotation of the chamber causes the fixing ring and the baffle seat to rotate synchronously, disengaging the outer snap-fit ​​on the fixing ring from the outer locking groove on the top cover seat. At this point, within a certain angle range, the chamber remains open regardless of whether it rotates clockwise or counterclockwise. This continued rotation allows for adjustment of the blade assembly gap, integrating the adjustment function into the chamber's rotation. This significantly improves the ease of operation and adjustment precision of the coffee grinder, and greatly simplifies maintenance and cleaning. The product demonstrates significant improvements in user experience, performance, and maintainability, making it suitable for widespread use.

[0062] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A bean grinder coffee maker characterized by: Includes a main unit (1), the main unit (1) has an installation hole on the top, and a top cover seat (2) is provided covering the installation hole. The bean box assembly (4) is rotatably installed above the top cover seat (2). The top cover seat (2) is connected to a knife assembly (6) through a lifting assembly (5) below it. The bean box assembly (4) and the knife assembly (6) are connected in a conductive manner. The bottom of the bean box assembly (4) is equipped with a fixing ring (3), which is connected downward to the lifting assembly (5). Rotating the bean box assembly (4) causes the lifting assembly (5) to rotate, thereby adjusting the gap of the cutter assembly (6). The fixing ring (3) is provided with an external snap fastener (31) which is fastened to the external snap groove (21) provided on the top cover seat (2).

2. A bean grinder coffee maker as claimed in claim 1, characterized in that: The bean box assembly (4) includes, from top to bottom, a box body (41), a baffle seat (42), and a lock cover (43). The lock cover (43) is inserted into the bottom of the box body (41) and clamps the baffle seat (42) between the box body (41) and the lock cover (43). The inner wall of the fixing ring (3) is provided with a limiting groove (32) and a movable groove (33). The baffle seat (42) is fixedly connected in the limiting groove (32) and is connected to the fixing ring (3) as a whole. Several rotating grooves (421) are opened through the baffle seat (42). When the box body (41) is rotated, the lock cover (43) is driven to rotate in the rotating groove (421). The upper baffle (411) spanning the middle of the box body (41) overlaps with the lower baffle (422) in the middle of the baffle seat (42), and the box body (41) is opened. The cylindrical surface of the lock cover (43) is provided with an inner buckle groove (431) and an inner snap fastener (34) on the inner wall of the fixing ring (3). The lock cover (43) is connected to the inner wall of the movable groove (33). When the box body (41) is rotated, the baffle seat (42) is driven to rotate synchronously through the fixing ring (3). The outer snap fastener (31) is disengaged from the outer buckle groove (21), and the box body (41) is always in the open state. The bottom of the fixed ring (3) is provided with several adjusting columns (35). The adjusting columns (35) are inserted into the adjusting holes (511) of the lifting assembly (5). When the fixed ring (3) rotates, it drives the lifting assembly (5) to rotate synchronously.

3. A bean grinder coffee maker as claimed in claim 2, characterized in that: The bottom of the box (41) has a protrusion forming several positioning posts (412), and the lock cover (43) has several positioning holes (432) through it. The positioning posts (412) are inserted into the positioning holes (432) to connect the box (41) and the lock cover (43) into one piece. The positioning posts (412) are inserted across the rotating groove (421) and rotate along the rotating groove (421).

4. A bean grinder coffee maker as claimed in claim 2, wherein: The locking cover (43) has two symmetrically protruding lower connecting platforms (433) on its cylindrical surface; the baffle seat (42) has two symmetrically protruding upper connecting platforms (423) on its cylindrical surface, and the lower connecting platforms (433) are similar in shape to the upper connecting platforms (423); the limiting groove (32) is designed to be similar in shape to the lower connecting platforms (433).

5. A bean grinder coffee maker as defined in claim 2, wherein: The inner wall of the top cover (2) is provided with an arc-shaped boss (22), and the outer buckle groove (21) is a groove provided on the arc-shaped boss (22); the outer snap fastener (31) presses against the arc-shaped boss (22).

6. A bean grinder coffee maker as defined in claim 2, wherein: The inner wall of the top cover (2) is provided with an outer limiting rib (23), and correspondingly, the outer cylindrical surface of the fixing ring (3) is provided with an inner limiting rib (36). The inner limiting rib (36) is connected to the outer limiting rib (23) to limit the rotation angle of the fixing ring (3).

7. A bean grinder coffee maker as defined in claim 2, wherein: The lifting assembly (5) includes a gear shifting wheel (51), and the end face of the gear shifting wheel (51) is recessed with several adjustment holes (511). The adjustment column (35) is inserted and placed in the adjustment hole (511). The cutting tool assembly (6) includes an upper grinding disc (61) and a lower grinding disc (62). The lower grinding disc (62) is mounted on the drive motor (11) of the host (1).

8. A bean grinder coffee maker as claimed in claim 7, characterized in that: The lifting assembly (5) also includes a lifting platform (52) and an upper grinding disc (61) seat (53) enclosed in the gear shift wheel (51), with the upper grinding disc (61) mounted on the upper grinding disc (61) seat (53).

9. A bean grinder coffee maker as defined in claim 8, characterized in that: The outer wall of the upper grinding disc (61) seat (53) has several protruding docking platforms (531). Correspondingly, the inner wall of the lifting platform (52) is recessed to form a docking groove (521). The docking platform (531) is rotated into the docking groove (521). The upper grinding disc (61) is detachably installed in the gear shifting wheel (51).

10. A bean grinder coffee maker as claimed in claim 8, characterized in that: The inner wall of the gear shifting wheel (51) is recessed with a threaded rotating groove (512), and the outer cylindrical surface of the lifting platform (52) is provided with several threaded bosses (522). The threaded bosses (522) are screwed into the threaded rotating groove (512). When the gear shifting wheel (51) rotates, the upper grinding disc (61) is driven to move axially up and down through the lifting platform (52) to adjust the gap between the upper grinding disc (61) and the lower grinding disc (62).

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