Coffee bean grinder with grinding noise reduction and convenient powder bouncing

Abstract

The utility model discloses a coffee bean grinder with grinding noise reduction and convenient powder bouncing. The coffee bean grinder comprises a seat body and a main shell, wherein the main shell and the seat body form a sealed space; a grinding bin, a main control board and a driving motor controlled by the main control board are contained in the main shell, and the driving motor is used for driving a grinding disc in the grinding bin to rotate so as to achieve grinding and processing, and coffee bean raw materials are converted into coffee powder; furthermore, a fixing pin is arranged on the output shaft of the driving motor in a penetrating mode, and the surface of the fixing pin is sleeved with a buffering sleeve. The driven end of the millstone is connected with the buffering sleeve, in the working process of the driving motor, the fixing pin transmits rotating force of the driving motor to the millstone to drive the millstone, the buffering sleeve is arranged on the surface of the fixing pin, the fixing pin makes direct contact with the millstone through the buffering sleeve, and vibration, noise and concentricity in the rotating process caused by direct contact are avoided.

Description

Technical Field

[0001] This utility model relates to the field of coffee grinders, and more particularly to a coffee grinder that reduces grinding noise and is easy to reel in coffee powder. Background Technology

[0002] With changing lifestyles and improved living standards, more and more people are accepting and enjoying coffee, leading to the emergence of various coffee grinders for home use. Current coffee grinders typically include a bean inlet, a grinding chamber, and a base. The grinding chamber contains a grinding disc, and the base houses a drive unit that provides rotational force to the grinding disc, transforming coffee beans into coffee powder. In this structure, the drive unit's output shaft is directly connected to the grinding disc, which can easily generate significant noise during rotation. Furthermore, the powder outlet pipe, connected to the grinding chamber for user dispensing, is prone to powder jamming. Traditional technology uses a powder ejector mechanism to remove powder and prevent blockage. However, current powder ejector mechanisms use a ring-shaped component in the pipe with a spring to impact the outlet pipe, causing the powder to fall. However, this design has limited radial travel in the outlet pipe, making it ineffective at dispensing highly adhesive coffee powder. Therefore, a more reasonable design is needed to address these shortcomings. Utility Model Content

[0003] In view of the technical problems of excessive noise caused by the direct connection between the drive unit and the grinding disc and poor powder removal performance of the powder outlet tube in existing coffee grinders, this utility model provides a solution.

[0004] To achieve the above objectives, this utility model provides a coffee grinder with reduced grinding noise and convenient powder retraction, characterized in that it includes a base and a main shell forming a sealed space with the base; the main shell contains a grinding chamber, a main control board and a drive motor controlled by the main control board, the drive motor being used to drive the grinding disc in the grinding chamber to rotate.

[0005] The drive motor has a fixed pin on its output shaft, and a buffer sleeve is fitted on the surface of the fixed pin; the driven end of the grinding disc is connected to the buffer sleeve.

[0006] As an improvement of this application, the driven end of the grinding disc is provided with a connecting sleeve, and the opposite sides of the connecting sleeve are provided with snap-fit ​​grooves for engaging with the buffer sleeve.

[0007] As an improvement of this application, the outer wall of the grinding chamber is further provided with a first pipe and a second pipe connected in sequence, the end of the first pipe being located on the outer wall of the shell; the second pipe is fitted with a recovery structure, the outer edge of the recovery structure being fixedly connected to the outer wall of the shell, and the second pipe reciprocating to impact the first pipe.

[0008] As an improvement of this application, the two opposite sides of the second pipe are further provided with fixed protrusions; the recovery structure includes elastic members matching the number of fixed protrusions, one end of the elastic members is connected to the fixed protrusions, and the other end is connected to the end face of the recovery structure.

[0009] As an improvement of this application, the elastic element is a spring, and the end face of the return structure is provided with a spring groove for fixing and accommodating the spring.

[0010] As an improvement of this application, the end of the first pipe away from the grinding chamber has a portion of its volume to be movably fitted onto the second pipe.

[0011] As an improvement of this application, the main shell is provided with a receiving notch, and the recovery structure is located within the receiving notch so as to be flush with the surface formed by the outer shell.

[0012] As an improvement of this application, the inner walls on both sides of the receiving notch are further provided with guide protrusions, and the two sides of the recovery structure are provided with guide grooves that are adapted to the guide protrusions.

[0013] As an improvement of this application, the bottom surface of the receiving notch is further provided with at least one magnetic suction unit, and the recovery structure is provided with a magnetic suction groove adapted to the magnetic suction unit.

[0014] As an improvement to this application, the grinding disc is either a conical grinding disc or a flat grinding disc.

[0015] The beneficial effects of this utility model are as follows: Compared with the prior art, this utility model provides a coffee grinder with reduced grinding noise and convenient powder retraction, including a base and a main shell forming a sealed space with the base; the main shell contains a grinding chamber, a main control board, and a drive motor controlled by the main control board. The drive motor is used to drive the grinding disc in the grinding chamber to rotate to achieve grinding and processing, thus turning coffee bean raw materials into coffee powder; furthermore, a fixing pin is provided on the output shaft of the drive motor, and a buffer sleeve is provided on the surface of the fixing pin; the driven end of the grinding disc is connected to the buffer sleeve. During the operation of the drive motor, the fixing pin transmits the rotational force of the drive motor to the grinding disc, thereby driving the grinding disc. The buffer sleeve on the surface of the fixing pin and the direct contact between the buffer sleeve and the grinding disc avoid the vibration, noise, and concentricity during rotation caused by direct contact. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present utility model;

[0017] Figure 2 This is an exploded view of the present invention;

[0018] Figure 3 This is a schematic diagram showing the interaction between the drive motor and the grinding chamber of this utility model.

[0019] Figure 4 This is a schematic diagram of the cooperation between the recovery structure and the second pipe of this utility model;

[0020] Figure 5 This is a schematic diagram of the drive motor structure of this utility model;

[0021] Figure 6 For the present utility model Figure 5 A magnified view of a portion of region A;

[0022] Figure 7 This is a schematic diagram of the receiving notch of this utility model;

[0023] Figure 8 For the present utility model Figure 7 A magnified view of a portion of region B.

[0024] The symbols for the main components are explained below:

[0025] 1. Base; 2. Main shell; 21. Accommodation notch; 22. Guide protrusion; 23. Magnetic suction unit;

[0026] 3. Grinding chamber; 31. Connecting sleeve; 4. Main control board; 5. Drive motor; 51. Fixing pin;

[0027] 52. Buffer sleeve; 6. First pipe; 7. Second pipe; 71. Fixing protrusion; 8. Recovery structure;

[0028] 81. Elastic element; 82. Spring groove; 83. Guide groove. Detailed Implementation

[0029] To more clearly illustrate this utility model, the following description, in conjunction with the accompanying drawings, will provide a further picture.

[0030] In the following description, specific examples are given to provide a more in-depth understanding of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of them. It should be understood that the specific embodiments described are only used to explain the present invention and are not intended to limit the present invention.

[0031] It should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the said feature, integral, step, operation, element, or component, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, or combinations thereof.

[0032] To address the technical problems of excessive noise and poor powder removal performance in existing coffee grinders due to the direct connection between the drive unit and the grinding disc, this application provides a coffee grinder with reduced grinding noise and convenient powder removal. Please refer to the appendix. Figure 1 To be continued Figure 8 The system includes a base 1 and a main shell 2 that forms a sealed space with the base 1. The main shell 2 contains a grinding chamber 3, a main control board 4, and a drive motor 5 controlled by the main control board 4. The drive motor 5 drives the grinding disc in the grinding chamber 3 to rotate to achieve grinding and processing, thus turning coffee bean raw materials into coffee powder. Naturally, a bean hopper is set on the top of the main shell 2 for storing and feeding coffee beans, which is existing technology and will not be elaborated further. Furthermore, a fixing pin 51 is provided on the output shaft of the drive motor 5, and a buffer sleeve 52 is fitted on the surface of the fixing pin 51. The driven end of the grinding disc is connected to the buffer sleeve 52. During the operation of the drive motor 5, the fixing pin 51 transmits the rotational force of the drive motor 5 to the grinding disc, thereby driving the grinding disc. The buffer sleeve 52 on the surface of the fixing pin 51 directly contacts the grinding disc, avoiding vibration, noise, and concentricity during rotation caused by direct contact.

[0033] In the specific design, the driven end of the grinding disc is provided with a connecting sleeve 31, and the opposite sides of the connecting sleeve are provided with snap-fit ​​grooves for engaging with the buffer sleeve 52. It is easy to understand that by adding a connecting sleeve, the snap-fit ​​grooves are made to directly contact the buffer sleeve 52, and the fixing pin 51 plays the main role in transmission during rotation. The buffer sleeve 52 provides a buffering effect when the drive motor 5 is working, avoiding the vibration and abnormal noise caused by the direct snap-fit ​​between the connecting sleeve 31 and the fixing pin 51. The setting of the connecting sleeve 31 greatly reduces the difficulty of connecting the grinding disc and the drive motor 5.

[0034] As mentioned in the prior art, the existing powder-coated structure has low cleaning power. Therefore, in this embodiment, the outer wall of the grinding chamber 3 is further provided with a first pipe 6 and a second pipe 7 connected in sequence. The end of the first pipe 6 is located on the outer wall of the shell. The second pipe 7 is fitted with a return structure 8, the outer edge of which is fixedly connected to the outer wall of the shell, and the second pipe 7 reciprocates to impact the first pipe 6. It is easy to understand that after the coffee grinder grinds the beans, the resulting coffee powder is transported from the first pipe 6 and the second pipe 7 to the material cup. Due to its light texture, the coffee powder tends to stick to the inside of the pipe wall. In this embodiment, the first pipe 6 and the second pipe 7 are set separately, and a return mechanism is used to... The first pipe 6 reciprocates to impact the second pipe 7. When the second pipe 7 impacts the first pipe 6, both components vibrate, causing coffee powder to fall off the pipe wall. Compared to the prior art, which uses a single pipe and a powder-removing structure that impacts the pipe radially, this application directly uses the recovery structure 8 to achieve the impact of the second pipe 7 on the first pipe 6. This allows for a longer energy storage stroke within the same space and prevents coffee powder from accumulating on the pipe wall away from the impact point due to radial impact, thus avoiding secondary accumulation. In summary, the cooperation of the first pipe 6, the second pipe 7, and the recovery structure 8 achieves a superior powder removal effect.

[0035] In terms of the specific counterweights of the second pipe 7 and the return structure 8, the return structure 8 can be equipped with corresponding springs, torsion springs, or other structures to realize the reciprocating motion of the second pipe 7. The return structure 8 and the main shell 2 can be assembled by plugging, snapping, or screws. In this embodiment, the pipe columns on opposite sides of the second pipe 7 are also provided with fixing protrusions 71. The return structure 8 includes elastic elements 81 matching the number of fixing protrusions 71. One end of the elastic element 81 is connected to the fixing protrusion 71, and the other end is connected to the end face of the return structure 8. The second pipe 7 realizes reciprocating motion through the fixing protrusions 71 and the elastic elements 81. The structure 8 is connected in a way that makes the structure simpler and more efficient, and the movement of the second pipe 7 is smoother and less prone to jamming. In a further design, the elastic element 81 is a spring, and the end face of the return structure 8 is provided with a spring groove 82 for fixing and accommodating the spring. The spring groove 82 can accommodate the elastic element 81 very well. It is worth noting that the maximum energy storage stroke of the second channel is equal to the length of the spring groove 82, and the spring groove 82 also serves as a guide sliding groove for the fixed protrusion 71. This design structure is reasonable and can increase the energy storage stroke of the spring within a limited volume to obtain a greater impact force.

[0036] In actual use, it was found that during the collision of the first pipe 6 and the second pipe 7, coffee powder tends to spill out of the pipes when they separate. In a better solution, the end of the first pipe 6 away from the grinding chamber 3 has a portion of its volume that can be movably fitted onto the end collar of the second pipe 7. The inner diameter of the collar is the same as the inner diameter of the second pipe 7, while the outer diameter is smaller than the outer diameter of the second pipe 7, thus forming a step surface that can be impacted, reducing coffee powder spillage while ensuring that the impact action is successfully generated.

[0037] In this embodiment, the main shell 2 is provided with a receiving notch 21, and the recovery structure 8 is located inside the receiving notch 21 so as to be flush with the surface formed by the shell. The flushness of the recovery structure 8 with the surface of the shell can significantly increase the harmony of the product appearance without compromising aesthetics.

[0038] To reduce the assembly difficulty of the recovery structure 8 on the receiving notch 21, in this embodiment, the inner walls on both sides of the receiving notch 21 are also provided with guide protrusions 22, and the two sides of the recovery structure 8 are provided with guide grooves 83 that are adapted to the guide protrusions 22. The guide protrusions 22 and guide grooves 83 cooperate with each other to quickly help technicians and users install the recovery structure 8 onto the receiving notch 21. In a preferred embodiment, the bottom surface of the receiving notch 21 is also provided with at least one magnetic suction unit 23, and the recovery structure 8 is provided with a magnetic suction groove that is adapted to the magnetic suction unit 23. It is easy to understand that a stable suction assembly is achieved through the magnetic suction groove and the magnetic suction unit 23, and a faster installation is achieved by combining the guide protrusions 22 and the guide grooves 83.

[0039] In this embodiment, the grinding disc is either a conical grinding disc or a flat grinding disc. It is worth understanding that, due to the wide variety of coffee beans, different types of coffee beans require different degrees of coarseness to bring out their flavor advantages. Therefore, conical grinding discs and flat grinding discs each have their own advantages in the grinding process and can be configured according to different user groups.

[0040] The advantages of this utility model are:

[0041] A fixed pin is installed on the output shaft of the drive motor, and a buffer sleeve is fitted on the surface of the fixed pin. The driven end of the grinding disc is connected to the buffer sleeve. During the operation of the drive motor, the fixed pin transmits the rotational force of the drive motor to the grinding disc, thereby driving the grinding disc. The buffer sleeve on the surface of the fixed pin and the direct contact between the buffer sleeve and the grinding disc avoid vibration, noise and concentricity during rotation caused by direct contact.

[0042] The above-disclosed embodiments are only a few specific examples of this utility model. However, this utility model is not limited thereto. Any variations that can be conceived by those skilled in the art should fall within the protection scope of this utility model.

Claims

1. A coffee grinder that features noise reduction during grinding and convenient powder retraction, characterized in that: It includes a base and a main shell that forms a sealed space with the base; the main shell contains a grinding chamber, a main control board and a drive motor controlled by the main control board, the drive motor being used to drive the grinding disc in the grinding chamber to rotate; The drive motor has a fixed pin on its output shaft, and a buffer sleeve is fitted on the surface of the fixed pin; the driven end of the grinding disc is connected to the buffer sleeve.

2. The coffee grinder with noise reduction and convenient powder retraction as described in claim 1, characterized in that, The driven end of the grinding disc is provided with a connecting sleeve, and the opposite sides of the connecting sleeve are provided with snap-fit ​​grooves that snap into the buffer sleeve.

3. The coffee grinder with noise reduction and convenient powder retraction as described in claim 1, characterized in that, The outer wall of the grinding chamber is also provided with a first pipe and a second pipe connected in sequence. The end of the first pipe is located on the outer wall of the main shell. The second pipe is fitted with a return structure. The outer edge of the return structure is fixedly connected to the outer wall of the main shell, and the second pipe reciprocates to impact the first pipe.

4. The coffee grinder with noise reduction and convenient powder retraction according to claim 3, characterized in that, The second pipe is further provided with fixed protrusions on both sides of the pipe column; the recovery structure includes elastic elements that match the number of fixed protrusions, one end of the elastic element is connected to the fixed protrusion, and the other end is connected to the end face of the recovery structure.

5. The coffee grinder with noise reduction and convenient powder retraction according to claim 4, characterized in that, The elastic element is a spring, and the end face of the recovery structure is provided with a spring groove for fixing and accommodating the spring.

6. The coffee grinder with noise reduction and convenient powder retraction according to claim 3, characterized in that, The end of the first pipe away from the grinding chamber has a portion of its volume to be movably fitted onto the second pipe.

7. The coffee grinder with noise reduction and convenient powder retraction according to claim 4, characterized in that, The main shell has a receiving notch, and the recovery structure is located within the receiving notch so as to be flush with the surface formed by the main shell.

8. The coffee grinder with noise reduction and convenient powder retraction according to claim 7, characterized in that, The inner walls on both sides of the receiving notch are also provided with guide protrusions, and the two sides of the recovery structure are provided with guide grooves that are adapted to the guide protrusions.

9. The coffee grinder with noise reduction and convenient powder retraction according to claim 7, characterized in that, The bottom surface of the receiving notch is also provided with at least one magnetic suction unit, and the recovery structure is provided with a magnetic suction groove adapted to the magnetic suction unit.

10. The coffee grinder with noise reduction and convenient powder retraction according to any one of claims 1-9, characterized in that, The grinding disc is either a conical grinding disc or a flat grinding disc.

Images