A grinding chamber structure for a coffee grinder

Abstract

This utility model discloses a grinding chamber structure for a coffee grinder, including a grinding chamber body. A rotation center hole is provided at the bottom axis of the grinding chamber body. A discharge port is located at the bottom of one side of the grinding chamber body. A limit adjustment ring is threadedly connected to the top of the outer surface of the grinding chamber body. A fixing ring is inserted and installed inside the grinding chamber body, and the fixing ring is fixedly connected to the inner surface of the limit adjustment ring. The bottom of the inner surface of the fixing ring has a fixing groove. The advantages of this utility model are: its design is reasonable, its structure is simple and stable, and it is highly practical; the combination of an external threaded installation of the fixing ring and a circulating airflow system (annular air cavity + gradually narrowing through hole), along with the vortex pressurization effect of the involute guide ridges within the through hole, significantly improves the removal of residual powder in the grinding chamber, completely solving the problem of powder accumulation in traditional threaded structures and preventing powder from entering the adjustment mechanism, making it suitable for widespread use.

Description

Technical Field

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

[0002] A coffee grinder is the core equipment for coffee making, used to grind coffee beans into powder of a specific fineness. Its performance directly affects the integrity of coffee flavor release and extraction efficiency. Modern coffee grinders are mainly divided into two categories: manual and electric. Manual grinders mostly use ceramic or steel conical burrs and grind by rotating the handle, suitable for portable scenarios and users who appreciate a sense of ritual. Electric grinders are equipped with flat burrs or ghost tooth burrs and are driven by a motor to achieve fast and uniform grinding, commonly found in home and commercial settings.

[0003] Chinese patent CN215777561U discloses a coffee grinder with electrically adjustable coffee powder coarseness. The grinder chamber has an upper blade connected to the top of its inner surface by threads. The outer surface of the upper blade is equipped with a toothed disc. When a second rotary motor is turned on (its rotation direction and speed are selected according to actual needs), the worm gear, in conjunction with the first and second bevel gears, drives the upper blade to rotate, thereby controlling the height of the upper blade and adjusting the distance between the upper and lower blades to grind coffee powder of different coarseness. However, in this patent, coffee powder remains inside the grinder chamber after grinding, making it difficult to clean. Furthermore, since the upper blade is threaded to the inner surface of the grinder chamber, coffee powder can easily enter the threads on the inner surface of the grinder chamber during grinding, increasing the difficulty of cleaning the residue. The presence of residual coffee powder in the grinder chamber, if not cleaned, will affect the quality of the subsequent coffee production and directly impact the taste of the coffee. Further development and improvement are needed. Utility Model Content

[0004] The purpose of this invention is to provide a grinding chamber structure for a coffee grinder to solve the problem of inconvenient cleaning of residual coffee powder in the grinding chamber of existing coffee grinders, which affects the taste of coffee.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: a grinding chamber structure for a coffee grinder, comprising a grinding chamber body, a rotating center hole at the bottom axis of the grinding chamber body, a discharge port at one bottom end of the grinding chamber body, a limit adjustment ring threadedly connected to the top of the outer surface of the grinding chamber body, a fixing ring inserted into the inner side of the grinding chamber body, the fixing ring being fixedly connected to the inner surface of the limit adjustment ring, a fixing groove at the bottom end of the inner surface of the fixing ring, a sealing ring recessed at the bottom end of the outer surface of the fixing ring, a plurality of through holes equidistantly arranged in a circular direction between the fixing groove and the sealing ring, an annular air cavity provided at the top of the fixing ring corresponding to the position of the through holes, the through holes communicating with the annular air cavity, and a transmission gear plate provided on the outer surface of the limit adjustment ring.

[0006] Furthermore, the outer surface of the grinding chamber body is provided with heat dissipation fins. The heat dissipation fins are in the form of sheets and are equidistantly distributed along the circumference of the grinding chamber body to increase the heat dissipation area of ​​the grinding chamber body.

[0007] Furthermore, the axis of the through hole forms an inclination angle of 5-30° with the axis of the grinding chamber body, and the inclination direction of the through hole forms an acute angle with the rotation direction of the grinding disc.

[0008] Furthermore, the diameter of the through hole gradually decreases from the outer surface to the inner surface of the fixing ring, forming a tapered structure, which is used to increase the airflow velocity and enhance the wind force entering the interior of the grinding chamber body.

[0009] Furthermore, the through hole is provided with a spiral pressurization channel, and the inner wall of the channel is provided with continuous involute guide ribs with a rib height of 0.2-0.5mm and a spiral angle of 45°, so that the airflow generates a vortex pressurization effect when it passes through.

[0010] Compared with the prior art, the beneficial effects of this utility model are: the utility model has a reasonable design, simple and stable structure, and strong practicality; the structure of the external threaded installation and fixing ring is combined with the circulating airflow system (annular air cavity + gradually narrowing through hole), and with the vortex pressurization effect of the involute guide ridge in the through hole, the removal effect of residual powder in the grinding chamber is greatly improved, completely solving the problem of easy powder accumulation in the traditional threaded structure, and blocking the phenomenon of powder intrusion into the adjustment mechanism, making it suitable for widespread use. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0012] Figure 2 This is a schematic diagram of the cross-sectional structure of the present invention;

[0013] Figure 3 for Figure 2 Enlarged view of part A in the middle.

[0014] In the diagram: 1-Grinding chamber body, 2-Limit adjustment ring, 3-Fixed mounting ring, 4-Fixed mounting groove, 5-Sealing ring, 6-Through hole, 7-Annular air cavity, 8-Transmission gear plate. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] Combination Figures 1 to 3 The grinding chamber structure of a coffee grinder shown includes a grinding chamber body 1. A rotation center hole is provided at the bottom axis of the grinding chamber body 1. A discharge port is provided at the bottom end of one side of the grinding chamber body 1. A limit adjustment ring 2 is threadedly connected to the top of the outer surface of the grinding chamber body 1. A fixing ring 3 is inserted and installed inside the grinding chamber body 1. The fixing ring 3 is fixedly connected to the inner surface of the limit adjustment ring 2. A fixing groove 4 is provided at the bottom end of the inner surface of the fixing ring 3. A sealing ring 5 is recessed at the bottom end of the outer surface of the fixing ring 3. Several through holes 6 are provided equidistantly in a circular direction between the fixing groove 4 and the sealing ring 5. An annular air cavity 7 is provided at the top of the fixing ring 3 corresponding to the position of the through holes 6. The through holes 6 are connected to the annular air cavity 7. A transmission gear plate 8 is provided on the outer surface of the limit adjustment ring 2.

[0018] The outer surface of the grinding chamber body 1 is provided with heat dissipation fins. The heat dissipation fins are in the form of sheets and are equidistantly distributed along the circumference of the grinding chamber body 1 to increase the heat dissipation area of ​​the grinding chamber body 1. This effectively prevents the aromatic substances of coffee powder from volatilizing and clumping due to high temperature, and at the same time extends the service life of core components such as the burr. The axis of the through hole 6 forms an inclination angle of 5-30° with the axis of the grinding chamber body 1. The inclination direction of the through hole 6 forms an acute angle with the rotation direction of the grinding disc, forming a directional airflow channel that conforms to the principles of fluid mechanics. This design creates a synergistic effect between the airflow and the centrifugal force generated by the rotating blade, precisely guiding residual powder to the outlet. The diameter of the through hole 6 gradually decreases from the outer surface to the inner surface of the fixing ring 3, forming a tapered structure to increase the airflow velocity and enhance the wind force entering the grinding chamber body 1. The through hole 6 is equipped with a spiral pressurization channel, and the inner wall of the channel is provided with continuous involute guide ribs with a rib height of 0.2-0.5mm and a spiral angle of 45°, so that the airflow generates a vortex pressurization effect when passing through, effectively solving the problem of mixed coffee flavor caused by residual powder.

[0019] In use, the annular air chamber is connected to a fan, and the transmission gear plate is meshed with a worm gear transmission mechanism. By connecting a limit adjustment ring to the outer surface of the grinding chamber and a matching sealing ring structure, the height of the upper blade plate installed in the fixed mounting slot can be adjusted while preventing coffee powder from easily entering the adjustment mechanism. The fan sends airflow through the annular air chamber into the chamber. Through the inclination and tapering of the through hole and the involute guide rib structure, the airflow entering the grinding chamber has strong pressure, blowing away the residual coffee powder in the grinding chamber.

[0020] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0021] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A grinding chamber structure of a coffee grinder, comprising a grinding chamber body (1) provided with a rotating center hole at the bottom axis, and a discharge port at the bottom end of one side of the grinding chamber body (1), characterized in that: The grinding chamber body (1) has a limit adjustment ring (2) threadedly connected to the top of its outer surface. A fixed mounting ring (3) is inserted into the inner side of the grinding chamber body (1). The fixed mounting ring (3) is fixedly connected to the inner surface of the limit adjustment ring (2). The bottom of the inner surface of the fixed mounting ring (3) has a fixed mounting groove (4). A sealing ring (5) is recessed at the bottom of the outer surface of the fixed mounting ring (3). The fixed mounting ring (3) has several through holes (6) arranged equidistantly in a circular direction between the fixed mounting groove (4) and the sealing ring (5). An annular air cavity (7) is provided on the top of the fixed mounting ring (3) corresponding to the position of the through hole (6). The through hole (6) is connected to the annular air cavity (7). A transmission gear plate (8) is provided on the outer surface of the limit adjustment ring (2).

2. The grinding chamber structure of a coffee grinder according to claim 1, characterized in that: The outer surface of the grinding chamber body (1) is provided with heat dissipation fins. The heat dissipation fins are in sheet-like structure and are equidistantly distributed along the circumference of the grinding chamber body (1) to increase the heat dissipation area of ​​the grinding chamber body (1).

3. The grinding chamber structure of a coffee grinder according to claim 1, characterized in that: The axis of the through hole (6) forms an inclination angle of 5-30° with the axis of the grinding chamber body (1), and the inclination direction of the through hole (6) forms an acute angle with the rotation direction of the grinding disc.

4. The grinding chamber structure of a coffee grinder according to claim 1, characterized in that: The diameter of the through hole (6) gradually decreases from the outer surface to the inner surface of the fixed mounting ring (3), forming a tapered structure to increase the airflow velocity and enhance the wind force entering the interior of the grinding chamber body (1).

5. The grinding chamber structure of a coffee grinder according to claim 1, characterized in that: The through hole (6) is provided with a spiral pressurization channel. The inner wall of the channel is provided with continuous involute guide ribs with a height of 0.2-0.5mm and a spiral angle of 45°, so that the airflow generates a vortex pressurization effect when it passes through.

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