Combined adjustment knob structure and coffee grinder

Abstract

The utility model relates to domestic appliance technical field, especially point to a kind of combination adjusting knob structure, simultaneously disclose a kind of bean grinder;Including mainboard support, the inside of mainboard support is equipped with electric control board, and first knob and second knob are equipped on mainboard support, the first knob and second knob are rotatably connected with mainboard support around same axis, and electric potential component and gear component are equipped on electric control board, first knob is connected with electric potential component, and second knob is connected with gear component;A kind of combination adjusting knob structure of the utility model, first knob pairing electric potential component is used to adjust grinding amount, second knob pairing gear component is used to adjust grinding gap, first knob and second knob are integrally combined and set, operation is more simple and convenient.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, specifically to a combined adjustment knob structure, and also discloses a coffee grinder. Background Technology

[0002] A coffee grinder is a device used to crush and grind ingredients. It can be further categorized into coffee grinders, pulverizers, blenders, etc., and is mainly used for processing coffee beans, tea leaves, fruits, and various other food products. The electrical control mechanism of a coffee grinder is primarily used to adjust the grinding gap to control the particle size and to adjust the operating time to control the output of coffee powder.

[0003] For example, Chinese patent CN203564131U discloses a coffee grinder for grinding coffee powder, which includes a shell, a bean hopper assembly disposed on the top of the shell, a grinding mechanism assembly and a main body assembly disposed inside the shell, a powder receiving box assembly disposed on one side of the lower part of the shell, and a knob and a push-button switch disposed on the outer surface of the shell. The main body assembly is provided with a PCB control board for controlling the grinding time and the amount of coffee powder. The position of the knob corresponds to the position of the PCB control board and is connected to the PCB control board for adjusting the amount of coffee powder. The position of the push-button switch corresponds to the position of the PCB control board and is connected to the PCB control board for controlling the start and stop of the machine.

[0004] In the aforementioned prior art, the knob can only adjust the amount of coffee powder. The knob is built into the housing and paired with the PCB control board. The knob has a lever for rotating it. It is known that coffee grinders also require adjustment of the grind size. However, the prior art separates the control knob for adjusting the grind size from the control knob for adjusting the amount of coffee powder dispensed, and places them in different locations on the machine body, making operation very inconvenient. Therefore, the prior art needs improvement and development. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings and deficiencies of the existing technology by providing a combination adjustment knob structure and a coffee grinder that is structurally reasonable and easy to operate.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] The present invention discloses a combined adjustment knob structure, including a main board bracket, an electronic control board on the inner side of the main board bracket, a first knob and a second knob on the main board bracket, the first knob and the second knob being rotatably connected to the main board bracket around the same axis, the electronic control board being provided with a potential component and a gear component, the first knob being connected to the potential component, and the second knob being connected to the gear component.

[0008] The first and second knobs are concentrically mounted on the mainboard bracket around the same axis, and both knobs can be rotated independently to drive the corresponding potentiometer and speed control components on the control board. It is understood that the potentiometer component can be used to adjust the grind size of the coffee grinder, and the speed control component can be used to adjust the amount of coffee grounds. Of course, the potentiometer and speed control components can be interchanged. This invention integrates the first and second knobs onto the mainboard bracket, making operation more convenient.

[0009] According to the above scheme, the first knob has a first inner hole, and the second knob is rotatably inserted through the first inner hole, so that the second knob and the first knob are arranged around the same axis. It can be understood that the first inner hole and the first knob are concentrically arranged, and the second knob is inserted through the first inner hole to form a hole-axis fit with it, thereby making the first knob and the second knob arranged around the same axis, and the two can rotate relative to each other without interfering with each other.

[0010] According to the above scheme, the motherboard bracket is provided with a positioning bracket, which is a circular sleeve structure. The inner hole of the positioning bracket forms a centering hole. The first knob has a first inner hole and is sleeved on the positioning bracket, forming a rotatable connection between the first knob and the positioning bracket through the first inner hole. The second knob passes through the centering hole and forms a rotatable connection between the second knob and the positioning bracket through the centering hole. The positioning bracket is used to assemble the first knob and the second knob. The positioning bracket is a circular sleeve with outer edge features and an inner centering hole feature. The first knob is sleeved on the outside of the positioning bracket through the first inner hole, that is, the first inner hole and the outer edge surface of the positioning bracket form a sliding fit, allowing the first knob to rotate around the axis of the positioning bracket. It can be understood that the second knob has an outer edge feature and passes through the centering hole, that is, the centering hole and the outer edge surface of the second knob form a sliding fit, allowing the second knob to rotate around the axis of the positioning bracket. The positioning bracket makes the first knob and the second knob concentric and arranged around the same axis on the motherboard bracket, making it easy for the user to find and operate the corresponding knob.

[0011] According to the above scheme, the first end of the positioning bracket is fixedly connected to the motherboard bracket, and the second end of the positioning bracket is provided with a stop ring. The first knob is rotatably disposed between the positioning bracket and the stop ring. The positioning bracket is installed on the outer wall of the motherboard bracket. Similarly, the first end of the first knob is paired with the outer wall of the motherboard bracket, and the stop ring on the second end of the positioning bracket constitutes an axial limit on the first knob. Of course, there is a gap between the limit formed by the stop ring and the motherboard bracket on the first knob, so that the first knob can rotate on the positioning bracket.

[0012] The first end of the second knob is provided with an elastic fastener, and the motherboard bracket is provided with a through hole. The first end of the second knob passes through the through hole and is paired with the gear shift assembly, and the elastic fastener is slidably fastened to the inner wall of the motherboard bracket. The first end of the second knob passes through the through hole and is paired with the gear shift assembly, that is, the gear shift assembly can limit the insertion direction of the second knob. Of course, the gear shift assembly can be fixedly connected to the second knob. The elastic fastener slides against the inner wall of the motherboard bracket, so that the second knob can rotate relative to the motherboard bracket and the positioning bracket.

[0013] According to the above scheme, the motherboard bracket is provided with a countersunk groove, and a through hole is opened at the center of the bottom surface of the countersunk groove. The first end of the positioning bracket is fixedly connected to the bottom surface of the countersunk groove. A notch is opened on the side wall of the countersunk groove, which allows the inner cavity of the countersunk groove to communicate with the inner space of the motherboard bracket. The first knob is paired with the notch to cooperate with the potential component. The motherboard bracket is provided with a recessed structure to form the countersunk groove, and the first end of the first knob is inserted into the countersunk groove so that the end face of the first end of the first knob is inside the motherboard bracket. Furthermore, the notch is opened on the side wall of the countersunk groove so that the first knob can cooperate with the potential component on the electronic control board.

[0014] According to the above scheme, the potentiometer assembly includes a first potentiometer and a driven gear. The first potentiometer is provided on the control board, and the driven gear is mounted on the torsion shaft of the first potentiometer, with the outer edge of the driven gear intersecting the notch. The first knob is provided with transmission teeth, which are paired with the notch to mesh with the driven gear. Specifically, the positioning bracket is also inserted into the countersunk groove, which is equivalent to the central island in the countersunk groove. The outer edge of the positioning bracket and the side wall of the countersunk groove form an island channel, and the first end of the first knob can rotate within the island channel. The driven gear intersects with the notch, that is, the driven gear part extends into the countersunk groove, so that the transmission teeth on the first knob can mesh with the driven gear. Similarly, the gear shift assembly includes a second potentiometer, which is provided on the control board. The first end of the second knob is paired with the torsion shaft of the second potentiometer. The gear shift assembly can also use a second potentiometer, with the second knob directly paired with the second potentiometer to achieve gear switching.

[0015] According to the above scheme, the gear shift assembly includes a base and a shift paddle. The base is fixedly mounted on the electronic control board, and a conductive shift plate is provided on one side of the electronic control board. A bearing is provided on the base, and the shift paddle is fitted onto the bearing so that it can rotate on the base. A conductive spring is provided on the shift paddle. The first end of the second knob is paired and connected to the shift paddle, thereby causing the conductive spring on the shift paddle to contact each gear position on the conductive shift plate. The bearing is fixed to the electronic control board via the base. The shift paddle has holes that mate with the bearing, and the shift paddle rotates with the bearing through the holes, allowing the conductive springs on it to contact each gear position on the conductive shift plate, thus achieving gear switching.

[0016] According to the above scheme, the second knob has a second inner hole, and a switch button is installed in the second inner hole; the electronic control board has a trigger element, which is located in the inner hole of the shaft seat, and the shaft seat has a limit buckle; the first end of the switch button passes through the inner hole of the shaft seat to be paired with the trigger element, and the switch button has a protruding buckle ring, which is connected to the limit buckle. Further, the second knob can have a second inner hole to install the switch button, which includes a circular cover and a shaft. The circular cover fits into the second inner hole, allowing the switch button to slide in and out of the second inner hole, and the shaft can extend into the inner hole of the shaft seat to activate the trigger element. The protruding buckle ring is located on the shaft of the switch button and cooperates with the limit buckle to prevent the switch button from falling out of the second inner hole. It is understood that a spring is installed in the second inner hole, allowing the switch button to automatically reset. That is, under normal conditions, the circular cover of the switch button can close the second inner hole port of the second knob, making the overall structure of the combined adjustment knob more aesthetically pleasing.

[0017] According to the above scheme, the base is provided with two guide holes, and a gear shift pin is provided in each guide hole. Both the shift paddle and the driven gear are provided with gear shift slots. One gear shift pin is paired with the shift paddle, and the other gear shift pin is paired with the driven gear. A spring is provided in each guide hole, and the spring supports the gear shift pin, causing it to slide and engage with the gear shift slot. The gear shift pin can move up and down along the guide hole, and the spring supports the gear shift pin, ensuring it always tends towards the shift paddle or driven gear, allowing the gear shift pin to insert into the gear shift slot. When the first or second knob is rotated, the gear shift pin jumps on the gear shift slot, creating a clicking sensation. Furthermore, the pairing of the gear shift pin and gear shift slot can compensate for situations where the gear is not properly engaged.

[0018] A coffee grinder includes a housing, on which the combined adjustment knob structure is provided.

[0019] This utility model discloses a combined adjustment knob structure. The first knob is paired with a potential component to adjust the grinding amount, and the second knob is paired with a gear component to adjust the grinding gap. The first knob and the second knob are integrated into one unit, making operation simpler and more convenient. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the assembly structure of the combined adjustment knob of this utility model;

[0021] Figure 2 This is an exploded view of the combined adjustment knob of this utility model;

[0022] Figure 3 This is a schematic diagram of the cross-sectional structure of the combined adjustment knob of this utility model;

[0023] Figure 4 This is a schematic diagram of the electronic control board structure of this utility model;

[0024] Figure 5 This is a schematic diagram of the gear shift component structure of this utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the coffee grinder of this utility model.

[0026] In the diagram: 1. Mainboard bracket; 2. Electronic control board; 3. First knob; 4. Second knob; 11. Positioning bracket; 12. Centering hole; 13. Stop ring; 14. Through hole; 15. Countersunk groove; 16. Housing; 21. First potentiometer; 22. Driven gear; 23. Second potentiometer; 24. Base; 25. Shift paddle; 26. Conductive shift plate; 27. Shaft seat; 28. Limit buckle; 29. ​​Shift slot; 31. First inner hole; 32. Transmission gear; 33. Shift pin; 34. Conductive spring; 41. Elastic fastener; 42. Second inner hole; 43. Switch button; 44. Protruding buckle ring; 45. Trigger element. Detailed Implementation

[0027] The technical solution of this utility model will be described below with reference to the accompanying drawings and embodiments.

[0028] like Figure 1-5As shown, the present invention discloses a combined adjustment knob structure, including a main board bracket 1. An electronic control board 2 is located on the inner side of the main board bracket 1. A first knob 3 and a second knob 4 are mounted on the main board bracket 1. The first knob 3 and the second knob 4 are rotatably connected to the main board bracket 1 around a common axis. The electronic control board 2 is equipped with a potential component and a speed control component. The first knob 3 is connected to the potential component, and the second knob 4 is connected to the speed control component. The first knob 3 and the second knob 4 are concentrically mounted on the main board bracket 1 around a common axis, and can rotate independently to drive the corresponding potential component and speed control component on the electronic control board 2. It is understood that the potential component can be used to adjust the grind size of the coffee grinder, and the speed control component can be used to adjust the amount of coffee grounds. Of course, the potential component and the speed control component can be interchanged. The present invention integrates the first knob 3 and the second knob 4 onto the main board bracket 1, making operation more convenient.

[0029] The first knob 3 has a first inner hole 31, and the second knob 4 is rotatably inserted through the first inner hole 31, so that the second knob 4 and the first knob 3 are arranged around the same axis. It can be understood that the first inner hole 31 and the first knob 3 are concentrically arranged, and the second knob 4 is inserted through the first inner hole 31 to form a hole-shaft fit with it, so that the first knob 3 and the second knob 4 are arranged around the same axis, and the two can rotate relative to each other without interfering with each other.

[0030] The motherboard bracket 1 is provided with a positioning bracket 11, which is a circular sleeve structure. The inner hole of the positioning bracket 11 forms a centering hole 12. The first knob 3 has a first inner hole 31 and is sleeved on the positioning bracket 11. The first knob 3 is rotatably connected to the positioning bracket 11 through the first inner hole 31. The second knob 4 passes through the centering hole 12 and is rotatably connected to the positioning bracket 11 through the centering hole 12. The positioning bracket 11 is used to assemble the first knob 3 and the second knob 4. The positioning bracket 11 is a circular sleeve with outer edge features and an inner centering hole 12 feature. The first knob 3 is sleeved on the outside of the positioning bracket 11 through the first inner hole 31, that is, the first inner hole 31 and the outer edge surface of the positioning bracket 11 form a sliding fit, so that the first knob 3 can rotate around the axis of the positioning bracket 11. It is understood that the second knob 4 has an outer edge feature, and the second knob 4 passes through the centering hole 12, that is, the centering hole 12 and the outer edge surface of the second knob 4 form a sliding fit, so that the second knob 4 can rotate around the axis of the positioning bracket 11. The positioning bracket 11 makes the first knob 3 and the second knob 4 concentric and arranged around the same axis on the motherboard bracket 1, so that the user can easily find and operate the corresponding knob.

[0031] The first end of the positioning bracket 11 is fixedly connected to the motherboard bracket 1, and the second end of the positioning bracket 11 is provided with a stop ring 13. The first knob 3 is rotatably disposed between the positioning bracket 11 and the stop ring 13. The positioning bracket 11 is installed on the outer wall of the motherboard bracket 1. Similarly, the first end of the first knob 3 is paired with the outer wall of the motherboard bracket 1. The stop ring 13 on the second end of the positioning bracket 11 forms an axial limit on the first knob 3. Of course, there is a gap between the limit formed by the stop ring 13 and the motherboard bracket 1 on the first knob 3, so that the first knob 3 can rotate on the positioning bracket 11.

[0032] The first end of the second knob 4 is provided with an elastic fastener 41, and the motherboard bracket 1 is provided with a through hole 14. The first end of the second knob 4 passes through the through hole 14 and is paired with the gear shift assembly, and the elastic fastener 41 is slidably fastened to the inner wall of the motherboard bracket 1. The first end of the second knob 4 passes through the through hole 14 and is paired with the gear shift assembly, that is, the gear shift assembly can limit the insertion direction of the second knob 4. Of course, the gear shift assembly can be fixedly connected to the second knob 4. The elastic fastener 41 slides with the inner wall of the motherboard bracket 1, so that the second knob 4 can rotate relative to the motherboard bracket 1 and the positioning bracket 11.

[0033] The motherboard bracket 1 has a countersunk groove 15, and a through hole 14 is formed at the center of the bottom surface of the countersunk groove 15. The first end of the positioning bracket 11 is fixedly connected to the bottom surface of the countersunk groove 15. A notch is formed on the side wall of the countersunk groove 15, which allows the inner cavity of the countersunk groove 15 to communicate with the inner space of the motherboard bracket 1. The first knob 3 is paired with the notch to cooperate with the potential component. The motherboard bracket 1 has a recessed structure to form the countersunk groove 15. The first end of the first knob 3 is inserted into the countersunk groove 15, so that the end face of the first end of the first knob 3 is inside the motherboard bracket 1. Furthermore, the notch is formed on the side wall of the countersunk groove 15, so that the first knob 3 can cooperate with the potential component on the electronic control board 2.

[0034] The potentiometer assembly includes a first potentiometer 21 and a driven gear 22. The first potentiometer 21 is mounted on the control board 2, and the driven gear 22 is mounted on the torsion shaft of the first potentiometer 21, with its outer edge intersecting the notch. The first knob 3 has a transmission gear 32, which is paired with the notch to mesh with the driven gear 22. Specifically, the positioning bracket 11 is also inserted into the countersunk groove 15. The positioning bracket 11 is equivalent to the central island in the countersunk groove 15, and an island channel is formed between the outer edge of the positioning bracket 11 and the side wall of the countersunk groove 15. The first end of the first knob 3 can rotate within the island channel. The driven gear 22 intersects with the notch, meaning that part of the driven gear 22 extends into the countersunk groove 15, allowing the transmission gear 32 on the first knob 3 to mesh with the driven gear 22.

[0035] As described above, the gear shift assembly includes a second potentiometer 23, which is mounted on the electronic control board 2. The first end of the second knob 4 is paired and connected to the torsion shaft of the second potentiometer 23. Alternatively, the gear shift assembly can use the second potentiometer 23, with the second knob 4 directly paired and connected to the second potentiometer 23 to achieve gear switching.

[0036] Furthermore, the gear shift assembly includes a base 24 and a shift paddle 25. The base 24 is fixedly mounted on the electronic control board 2, and a conductive shift plate 26 is provided on one side of the electronic control board 24. A bearing 27 is provided on the base 24, and the shift paddle 25 is fitted onto the bearing 27 so that it can rotate on the base 24. A conductive spring 34 is provided on the shift paddle 25. The first end of the second knob 4 is paired and connected with the shift paddle 25, thereby driving the conductive spring 34 on the shift paddle 25 to contact each gear position on the conductive shift plate 26. The bearing 27 is fixed to the electronic control board 2 via the base 24. The shift paddle 25 has a hole that mates with the bearing 27. The shift paddle 25 forms a rotational engagement with the bearing 27 through the hole, so that the conductive spring 34 on it can contact each gear position on the conductive shift plate 26 respectively, realizing gear switching.

[0037] The second knob 4 has a second inner hole 42, and a switch button 43 is provided in the second inner hole 42; the electronic control board 2 has a trigger 45, which is located in the inner hole of the bearing seat 27, and the bearing seat 27 has a limit buckle 28; the first end of the switch button 43 passes through the inner hole of the bearing seat 27 to be paired with the trigger 45, and the switch button 43 has a protruding buckle 44, which is connected to the limit buckle 28. Further, the second knob 4 can have a second inner hole 42 to install the switch button 43. The switch button 43 includes a circular cover and a shaft. The circular cover is adapted to the second inner hole 42, allowing the switch button 43 to slide in and out along the second inner hole 42, and the shaft can extend into the inner hole of the bearing seat 27 to activate the trigger 45. The protruding buckle 44 is set on the shaft of the switch button 43 and cooperates with the limit buckle 28 to prevent the switch button 43 from coming out of the second inner hole 42. It can be understood that a spring is provided in the second inner hole 42 so that the switch button 43 can automatically reset. That is, under normal conditions, the circular cover of the switch button 43 can close the port of the second inner hole 42 of the second knob 4, making the overall structure of the combined adjustment knob more aesthetically pleasing.

[0038] The base 24 has two guide holes, each containing a gear shift pin 33. Both the shift paddle 25 and the driven gear 22 have gear shift slots 29. One gear shift pin 33 is paired with the shift paddle 25, and the other is paired with the driven gear 22. A spring is installed in each guide hole, supporting the gear shift pin 33 to engage with the gear shift slot 29. The gear shift pin 33 can move up and down along the guide hole, and the spring's support keeps it aligned with either the shift paddle 25 or the driven gear 22, allowing it to insert into the gear shift slot 29. When the first knob 3 or the second knob 4 is rotated, the gear shift pin 33 jumps within the gear shift slot 29, creating a clicking sensation. The pairing of the gear shift pin 33 with the gear shift slot 29 can also prevent incorrect gear selection.

[0039] like Figure 6 As shown, a coffee grinder includes a housing 16, on which a combined adjustment knob structure is provided.

[0040] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A combined adjustment knob structure, comprising a main board bracket (1), wherein an electronic control board (2) is provided on the inner side of the main board bracket (1), and a first knob (3) and a second knob (4) are provided on the main board bracket (1), characterized in that, The first knob (3) and the second knob (4) are rotatably connected to the motherboard bracket (1) around the same axis. The electronic control board (2) is provided with a potential component and a gear component. The first knob (3) is connected to the potential component, and the second knob (4) is connected to the gear component.

2. The combination adjustment knob structure of claim 1, wherein The first knob (3) has a first inner hole (31), and the second knob (4) is rotatably inserted through the first inner hole (31), so that the second knob (4) and the first knob (3) are arranged around the same axis.

3. The combination adjustment knob structure of claim 1, wherein, The motherboard bracket (1) is provided with a positioning bracket (11), which is a circular sleeve structure. The inner hole of the positioning bracket (11) forms a centering hole (12). The first knob (3) is sleeved on the positioning bracket (11), and the first knob (3) is rotatably connected to the positioning bracket (11) through the first inner hole (31). The second knob (4) is inserted through the centering hole (12), and the second knob (4) is rotatably connected to the positioning bracket (11) through the centering hole (12).

4. The combination adjustment knob structure of claim 3, wherein, The first end of the positioning bracket (11) is fixedly connected to the main board bracket (1), and the second end of the positioning bracket (11) is provided with a stop ring (13). The first knob (3) is rotatably disposed between the positioning bracket (11) and the stop ring (13). The first end of the second knob (4) is provided with an elastic fastener (41), and the main board bracket (1) is provided with a through hole (14). The first end of the second knob (4) passes through the through hole (14) and is paired with the gear assembly. The elastic fastener (41) is slidably fastened to the inner wall of the main board bracket (1).

5. The combination adjustment knob structure of claim 4, wherein, The motherboard bracket (1) is provided with a countersunk groove (15), and a through hole (14) is opened at the center of the bottom surface of the countersunk groove (15). The first end of the positioning bracket (11) is fixedly connected to the bottom surface of the countersunk groove (15). The side wall of the countersunk groove (15) is provided with a notch, which allows the inner cavity of the countersunk groove (15) to communicate with the inner space of the motherboard bracket (1). The first knob (3) is paired with the notch to cooperate with the potential component.

6. The combination adjustment knob structure of claim 5, wherein, The potentiometer assembly includes a first potentiometer (21) and a driven gear (22). The first potentiometer (21) is provided on the control board (2). The driven gear (22) is mounted on the torsion shaft of the first potentiometer (21), and the outer edge of the driven gear (22) intersects with the notch. The first knob (3) is provided with a transmission tooth (32). The transmission tooth (32) is paired with the notch to mesh with the driven gear (22). The gear assembly includes a second potentiometer (23). The second potentiometer (23) is provided on the control board (2). The first end of the second knob (4) is paired with the torsion shaft of the second potentiometer (23).

7. The combination adjustment knob structure of claim 4, wherein, The gear shift assembly includes a base (24) and a shift paddle (25). The base (24) is fixedly mounted on the electronic control board (2). A conductive gear shift plate (26) is provided on the electronic control board (2) on one side of the base (24). A bearing seat (27) is provided on the base (24). The shift paddle (25) is fitted on the bearing seat (27) so that it can rotate on the base (24). A conductive spring (34) is provided on the shift paddle (25). The first end of the second knob (4) is paired and connected with the shift paddle (25), so that the conductive spring (34) on the shift paddle (25) can be driven to contact the various gear positions of the conductive gear shift plate (26).

8. The combination adjustment knob structure of claim 7, wherein, The second knob (4) has a second inner hole (42), and a switch button (43) is provided in the second inner hole (42); the electronic control board (2) is provided with a trigger (45), which is located in the inner hole of the bearing seat (27), and a limit buckle (28) is provided on the bearing seat (27); the first end of the switch button (43) passes through the inner hole of the bearing seat (27) and is paired with the trigger (45); the switch button (43) is provided with a protruding buckle (44), which is connected to the limit buckle (28).

9. The combination adjustment knob structure of claim 7, wherein, The base (24) is provided with two guide holes, and a gear pin (33) is provided in the guide hole. The shift paddle (25) and the driven gear (22) are both provided with gear slots (29). One gear pin (33) is paired with the shift paddle (25), and the other gear pin (33) is paired with the driven gear (22). A spring is provided in the guide hole, and the spring supports the gear pin (33) so that it slides into the gear slot (29).

10. A bean grinder, characterized by Includes a housing (16), on which is provided a combined adjustment knob structure as described in any one of claims 1-9.

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