A coffee grinder powder output precision control device

Abstract

This utility model relates to the field of coffee grinder technology, specifically a coffee grinder powder output precision control and adjustment device, including a grinding body, a gear shifting assembly, and a drive assembly. The gear shifting assembly includes a wheel and a circuit board. A centering seat is provided on the grinding body, and the wheel is rotatably mounted on the centering seat. The drive assembly is connected to the wheel. The circuit board is located on the surface of the wheel and has several gear shifting plates. A conductor is provided on the grinding body, and when the wheel rotates, the conductor can come into contact with any gear shifting plate for electrical connection. This utility model's coffee grinder powder output precision control and adjustment device allows any gear shifting plate to be paired with a conductor by rotating the wheel, thus forming a circuit with the circuit board. The circuit board can achieve more precise gear shifting, effectively improving the accuracy of coffee grinder powder output adjustment and reducing implementation costs.

Description

Technical Field

[0001] This utility model relates to the field of coffee grinder technology, and in particular to a coffee grinder powder output precision control and adjustment device. Background Technology

[0002] Coffee grinders need to control the amount of coffee grounds produced with each grind based on the desired dosage. The conventional method involves adjusting the coarse-fine setting of the nozzle, combined with the grinder's operating time, to achieve precise control of the coffee output. Other coffee grinders use potentiometers to create multiple settings to control the output.

[0003] For example, Chinese patent CN203458258U discloses an induction-type coffee grinder, which includes a grinder housing and a bean hopper assembly. The bean hopper assembly is rotatably mounted on the grinder housing via a connecting component. The grinder housing is equipped with multiple induction components that cooperate with the rotation of the bean hopper assembly. The induction components are electrically connected to a control board assembly. Since each different speed setting has a sensor, when the user rotates the bean hopper assembly to select the desired coffee powder setting, the sensor at that setting notifies the relevant program to control the amount of coffee powder dispensed.

[0004] The sensing device in the aforementioned prior art is a potentiometer. The number of potentiometers determines the number of speed settings. Adding speed settings will occupy internal space of the equipment, resulting in fewer speed settings for existing coffee grinders. Custom-made, expandable potentiometers will increase costs and make it difficult to meet the needs of fine control of the amount of coffee grounds produced at multiple speed settings.

[0005] Therefore, existing technologies still need to be improved and developed. Utility Model Content

[0006] The purpose of this utility model is to address the shortcomings and deficiencies of the existing technology by providing a coffee grinder powder output control device with a reasonable structure, precise adjustment levels, and accurate powder output.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] The present invention discloses a coffee grinder powder output precision control device, comprising a grinding body, a gear shifting assembly, and a drive assembly. The gear shifting assembly includes a wheel and a circuit board. A centering seat is provided on the grinding body, and the wheel is rotatably mounted on the centering seat. The drive assembly is connected to the wheel. The circuit board is located on the surface of the wheel and has several gear shifting plates. A conductor is provided on the grinding body, and when the wheel rotates, the conductor can make contact with any gear shifting plate to form an electrical connection.

[0009] The wheel and the centering seat are in a rotating engagement. The drive assembly can drive the wheel to rotate on the centering seat, causing the circuit board to rotate accordingly. Several gear plates are arranged sequentially along the rotation trajectory of the wheel, so that each gear plate can be paired with another gear plate. In other words, the rotation of the wheel allows the gear plates to pass through a conductor in sequence. Of course, the conductor always tends towards the circuit board, so it can come into contact with the gear plates to form an electrical connection.

[0010] It can be understood that several of the aforementioned speed-adjusting plates are connected to the printed circuits on the circuit board, and each speed-adjusting plate constitutes a speed-adjusting circuit. Theoretically, the larger the diameter of the wheel and the denser the distribution of the speed-adjusting plates, the more speed-adjusting circuits there are, allowing for more precise control of the grinder's powder output. In particular, the implementation cost is lower when setting several speed-adjusting plates on the circuit board to form several speed-adjusting circuits.

[0011] According to the above scheme, a plurality of gear plates are arranged sequentially and at intervals on the circuit board to form gear intervals, and the center of the gear interval is at the rotation center of the wheel. As described above, a plurality of gear plates are arranged sequentially and at intervals to form gear intervals, and the gear intervals are set along the rotation trajectory of the wheel. Therefore, the gear intervals are arc-shaped, so that the conductors can be paired with any gear plate to form a gear circuit.

[0012] According to the above scheme, the circuit board is further provided with an arc-shaped conductive sheet, and the arc-shaped conductive sheet and several gear plates are arranged at intervals, with the center of the arc-shaped conductive sheet at the rotation center of the wheel; the grinding body is provided with two conductors, and when the wheel rotates, one conductor is always in contact with the arc-shaped conductive sheet, while the other conductor can be in contact with any gear plate. The arc-shaped conductive sheet and the gear plates forming the gear intervals constitute positive and negative poles, respectively, and the two conductors are paired with the arc-shaped conductive sheet and any gear plate to form a gear circuit.

[0013] Specifically, the circuit board has positive and negative terminals connected to the controller's main circuit. The arc-shaped conductive plate is set as the positive terminal and the gear plate as the negative terminal. The two conductors are respectively connected to the motor with leads. The controller's main circuit, circuit board, conductors and motor form a loop. Since several gear plates can form different resistance differences and potential differences, more fine and precise gear loops can be obtained to improve the grinder's powder output accuracy.

[0014] The centering seat is located at the upper end of the grinding body, which contains a grinding head. A motor connected to the grinding head is located at the lower end of the grinding body. The grinding body, grinding head, and motor constitute the main structure of the coffee grinder. It can be understood that the centering seat is a hollow bushing structure. The centering seat communicates with the grinding chamber inside the grinding body and also serves as the feed inlet for the grinding chamber, paired with the coffee bean container.

[0015] According to the above scheme, the grinding body is provided with a base, which is located on one side of the centering base. Two guide holes are vertically arranged on the base, and two conductors are respectively inserted into the corresponding guide holes. An elastic element supporting the conductor is provided inside the guide holes. The base controls the direction of the conductor through the guide holes. It can be understood that the guide holes are countersunk holes with openings facing upwards, and the built-in elastic element is a spring used to support the conductor. The elastic element gives the conductor a potential energy that tends towards the circuit board and ensures that the conductor is in close contact with the arc-shaped conductive sheet and the stop plate.

[0016] According to the above scheme, a synchronizing spring is provided between the two conductors, and the end of the conductor that contacts the stop plate or arc-shaped conductive plate has a curved surface feature. The synchronizing spring is an elastic sheet structure, with holes at both ends for inserting the conductors, or the two conductors can be directly welded together to form an assembly. After welding leads to the lower end of the conductors, an assembly can be formed for easy assembly. Furthermore, since both conductors are equipped with elastic elements for support, and the guide holes guide the conductors, the synchronizing spring connecting the two conductors to form an assembly can maintain the contact stability between the conductors and the circuit board.

[0017] It is understood that the two conductors respectively contact the arc-shaped conductive sheet and the gear position sheet on the circuit board, forming a gear position circuit based on the synchronization spring. This gear position circuit can output a gear position signal to the main controller. At the same time, the leads on the two conductors are connected to the motor, forming an output circuit. This output circuit and the gear position circuit are essentially connected in parallel.

[0018] According to the above scheme, the gear shift assembly also includes a rotating bracket. The inner side wall of the lower end of the rotating bracket is provided with a threaded groove, and the outer wall of the centering seat is provided with a limiting tooth. The limiting tooth and the threaded groove are connected to each other, so that the rotating bracket can be rotatably mounted on the centering seat. The outer side wall of the upper end of the rotating bracket is provided with indexing teeth. The wheel is a ring structure, and the inner side wall of the wheel is provided with several locking teeth. The wheel is fitted on the rotating bracket, and the several locking teeth engage with the indexing teeth, so that the wheel and the rotating bracket can rotate together.

[0019] It is understandable that the centering seat on the grinding body serves as a feed pipe for pairing with the bean container, and its structural design prioritizes compatibility with the bean container. The grinding wheel needs to form a limiting fit with the centering seat in the vertical direction, and also needs to form a rotational fit with the centering seat in the circumferential direction.

[0020] To simplify the structure, a rotating bracket is set between the centering seat and the wheel. The wheel is assembled onto the grinding body through the rotating bracket. The limiting teeth are equivalent to threaded teeth. The rotating bracket is screwed onto the centering seat through the threaded groove to prevent it from falling off.

[0021] Furthermore, the rotation adjustment action of the wheel is reciprocating, meaning the arc angle of the circuit board is close to 180° and does not exceed 360°, i.e., the rotation adjustment range of the wheel is around 180°. The larger the diameter of the wheel, the more stop plates can be set on the circuit board. Therefore, the rotating bracket is screwed onto the centering seat through a threaded groove, and the vertical displacement generated by the rotating bracket during rotation is less than half of the threaded groove pitch.

[0022] In particular, the wheel is mounted on a rotating bracket, and the two form a circumferential connection by engaging the indexing teeth. The teeth can be directly inserted into the indexing teeth vertically, allowing the wheel to be directly mounted on the rotating bracket, which is very convenient. Furthermore, the displacement generated by the rotating bracket during rotation adjustment can be eliminated by the vertical degree of freedom between the teeth and the indexing teeth, maintaining the stability of the connection between the wheel and the drive component.

[0023] According to the above scheme, the wheel is equipped with a limiting post, and the grinding body is equipped with a stop. The limiting post and the stop are paired together. The stop serves as the starting point for adjusting the wheel. Of course, there can be two stops, with the other stop serving as the ending point for adjustment. The limiting post on the wheel cooperates with the stop to control the rotation amplitude.

[0024] According to the above scheme, the drive assembly includes a knob bracket, a drive gear on the knob bracket, and a transmission shaft on the drive gear, which is rotatably connected to the knob bracket. An adjustment knob is mounted on the transmission shaft, and a driven gear ring is mounted on the outer wall of the wheel. The drive gear meshes with the driven gear ring. The adjustment knob can rotate on the knob bracket via the transmission shaft. The transmission shaft and the knob bracket can be connected via a hole-shaft fit, or the transmission shaft can be mounted on the knob bracket using bearings. The transmission shaft can drive the drive gear to rotate, and the drive gear meshes with the driven gear, thereby driving the wheel to rotate synchronously. This gear transmission method allows for better control of the wheel's rotation amplitude, enabling any gear position to be paired with a conductor.

[0025] According to the above scheme, the knob bracket is equipped with a gear pin, and the drive gear is equipped with a hysteresis ring composed of several concave and convex patterns. The knob bracket is equipped with a return spring, which supports the gear pin so that it abuts against the hysteresis ring. The concave and convex patterns on the hysteresis ring correspond to several gear plates. That is, when the drive gear rotates at a certain angle, the gear pin slides through the concave and convex patterns on the hysteresis ring, generating damping and a clicking sensation. Furthermore, the rotation angle of the drive gear and the wheel corresponds one-to-one with the several gear plates, so that the indicator scale on the adjustment knob can correspond to the phase of each gear plate.

[0026] This utility model discloses a coffee grinder powder output precision control device. By rotating the wheel, any gear plate can be paired with a conductor to form a circuit with the circuit board. The circuit board can achieve more precise gear differentiation, effectively improving the accuracy of coffee grinder powder output adjustment, and reducing implementation costs. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0028] Figure 2 This is a schematic diagram showing the disassembled structure of the grinding body and gear assembly of this utility model;

[0029] Figure 3 This is a schematic diagram of the gear shift component and drive component of this utility model.

[0030] Figure 4 This is a cross-sectional structural diagram of the grinding body and gear assembly of this utility model.

[0031] In the diagram: 1. Grinding body; 2. Wheel; 3. Knob bracket; 11. Centering seat; 12. Conductor; 13. Base; 14. Guide hole; 15. Elastic element; 16. Synchronizing spring; 17. Stop; 110. Limiting tooth; 21. Circuit board; 22. Rotating bracket; 23. Limiting post; 201. Clamping tooth; 202. Passive gear ring; 211. Gear plate; 212. Arc-shaped conductive plate; 221. Threaded groove; 222. Indexing tooth; 31. Drive gear; 32. Transmission shaft; 33. Adjustment knob; 34. Gear pin; 35. Hysteresis ring; 36. Return spring. Detailed Implementation

[0032] The technical solution of this utility model will be described below with reference to the accompanying drawings and embodiments.

[0033] like Figure 1-4 As shown, the present invention discloses a coffee grinder powder output precision control device, comprising a grinding body 1, a gear assembly, and a drive assembly. The gear assembly includes a wheel 2 and a circuit board 21. The grinding body 1 is provided with a centering seat 11, and the wheel 2 is rotatably mounted on the centering seat 11. The drive assembly is connected to the wheel 2. The circuit board 21 is located on the surface of the wheel 2 and is provided with a plurality of gear plates 211. The grinding body 1 is provided with a conductor 12, which can make contact with any gear plate 211 when the wheel 2 rotates.

[0034] The wheel 2 and the centering seat 11 are in a rotational engagement. The drive assembly can drive the wheel 2 to rotate on the centering seat 11, causing the circuit board 21 to rotate accordingly. A plurality of the shift plates 211 are arranged sequentially along the rotation trajectory of the wheel 2, allowing each shift plate 211 to be paired with another shift plate 211. In other words, the rotation of the wheel 2 causes the shift plates 211 to pass sequentially through the conductor 12. The conductor 12 always tends towards the circuit board 21, thus contacting the shift plates 211 to form an electrical connection.

[0035] It can be understood that several of the aforementioned speed-adjusting plates 211 are connected to the printed circuits on the circuit board 21, and each speed-adjusting plate 211 constitutes a speed-adjusting circuit. Theoretically, the larger the diameter of the wheel 2 and the denser the distribution of the speed-adjusting plates 211, the more speed-adjusting circuits there are, allowing for more precise control of the grinder's powder output. In particular, the implementation cost of setting several speed-adjusting plates 211 on the circuit board 21 to form several speed-adjusting circuits is lower.

[0036] A plurality of the aforementioned gear plates 211 are arranged sequentially and at intervals on the circuit board 21 to form gear intervals, and the center of the gear interval is at the rotation center of the wheel 2. As described above, the plurality of gear plates 211 are arranged sequentially and at intervals to form gear intervals, and the gear intervals are arranged along the rotation trajectory of the wheel 2. Therefore, the gear intervals are arc-shaped, so that the conductor 12 can be paired with any gear plate 211 to form a gear circuit.

[0037] The circuit board 21 is also provided with an arc-shaped conductive sheet 212, and the arc-shaped conductive sheet 212 and several gear plates 211 are arranged in intervals. The center of the arc-shaped conductive sheet 212 is at the rotation center of the wheel 2. The grinding body 1 is provided with two conductors 12. When the wheel 2 rotates, one conductor 12 is always in contact with the arc-shaped conductive sheet 212, and the other conductor 12 can be in contact with any gear plate 211. The gear intervals formed by the arc-shaped conductive sheet 212 and several gear plates 211 constitute positive and negative poles, respectively. The two conductors 12 are paired with the arc-shaped conductive sheet 212 and any gear plate 211 to form a gear circuit.

[0038] Specifically, the circuit board 21 has positive and negative terminals connected to the main circuit of the controller. The arc-shaped conductive plate 212 is set as the positive terminal and the gear plate 211 is set as the negative terminal. The two conductors 12 are respectively set with leads to connect to the motor. Then the main circuit of the controller, the circuit board 21, the conductors 12 and the motor form a circuit. Since several gear plates 211 can form different resistance differences and potential differences, more fine and precise gear circuits can be obtained to improve the powder output accuracy of the grinder.

[0039] The centering seat 11 is located at the upper end of the grinding body 1. The grinding body 1 contains a grinding head, and a motor connected to the grinding head is located at the lower end of the grinding body 1. The grinding body 1, the grinding head, and the motor constitute the main structure of the coffee grinder. It can be understood that the centering seat 11 is a hollow bushing structure. The centering seat 11 communicates with the grinding chamber inside the grinding body 1 and also serves as the feed inlet of the grinding chamber, paired with the coffee bean box.

[0040] The grinding body 1 is provided with a base 13, which is located on one side of the centering base 11. The base 13 has two guide holes 14 vertically arranged on it, and two conductors 12 are respectively inserted through the corresponding guide holes 14. An elastic element 15 supporting the conductor 12 is provided in the guide hole 14. The base 13 controls the direction of the conductor 12 through the guide holes 14. It can be understood that the guide hole 14 is a countersunk hole structure with the opening facing upward. The built-in elastic element 15 is a spring used to support the conductor 12. The elastic element 15 gives the conductor 12 the potential energy to move towards the circuit board 21 and ensures that the conductor 12 is in close contact with the arc-shaped conductive sheet 212 and the stop sheet 211.

[0041] A synchronizing spring 16 is provided between the two conductors 12. The end of the conductor 12 that abuts against the stop plate 211 or the arc-shaped conductive plate 212 has a curved surface feature. The synchronizing spring 16 is an elastic sheet structure. The two ends of the synchronizing spring 16 are opened for the conductors 12 to pass through, or the two conductors 12 can be directly welded together to form an assembly. After welding leads to the lower end of the conductors 12, an assembly can be formed to facilitate assembly. Furthermore, since both conductors 12 are equipped with elastic elements 15 for support, and the guide hole 14 guides the conductors 12, the synchronizing spring 16 connects the two conductors 12 to form an assembly, which can maintain the contact stability between the conductors 12 and the circuit board 21.

[0042] It is understood that the two conductors 12 respectively contact the arc-shaped conductive sheet 212 and the gear position sheet 211 on the circuit board 21, forming a gear position circuit based on the synchronization spring 16. This gear position circuit can output a gear position signal to the main controller. At the same time, the leads on the two conductors 12 are connected to the motor, forming an output circuit. This output circuit and the gear position circuit are essentially connected in parallel.

[0043] The gear shift assembly also includes a rotating bracket 22. The inner sidewall of the lower end of the rotating bracket 22 is provided with a threaded groove 221, and the outer wall of the centering seat 11 is provided with a limiting tooth 110. The limiting tooth 110 is engaged with the threaded groove 221, so that the rotating bracket 22 is rotatably mounted on the centering seat 11. The outer sidewall of the upper end of the rotating bracket 22 is provided with an indexing tooth 222. The wheel 2 has an annular structure, and the inner sidewall of the wheel 2 is provided with several locking teeth 201. The wheel 2 is fitted onto the rotating bracket 22, and the several locking teeth 201 engage with the indexing tooth 222, so that the wheel 2 and the rotating bracket 22 can rotate together.

[0044] It is understandable that the centering seat 11 on the grinding body 1 is a feed pipe used to pair with the bean box, and its structural design is mainly for compatibility with the bean box. The wheel 2 needs to form a limiting fit with the centering seat 11 in the vertical direction, and also needs to form a rotational fit with the centering seat 11 in the circumferential direction.

[0045] To simplify the structure, a rotating bracket 22 is provided between the centering seat 11 and the wheel 2. The wheel 2 is assembled onto the grinding body 1 by the rotating bracket 22. The limiting tooth 110 is equivalent to a threaded tooth. The rotating bracket 22 is screwed onto the centering seat 11 through the threaded groove 221 to prevent it from falling off.

[0046] Furthermore, the rotation adjustment action of the wheel 2 is reciprocating, meaning the arc center angle of the circuit board 21 is close to 180° and does not exceed 360°. This means the rotation adjustment range of the wheel 2 is approximately 180°. The larger the diameter of the wheel 2, the more stop plates 211 can be installed on the circuit board 21. Therefore, the rotating bracket 22 is screwed onto the centering seat 11 via a threaded groove 221. The vertical displacement generated by the rotating bracket 22 during rotation is less than half the tooth pitch of the threaded groove 221.

[0047] In particular, the wheel 2 is mounted on the rotating bracket 22, and the two form a circumferential connection by engaging the indexing teeth 222 with the locking teeth 201. The locking teeth 201 can be directly inserted into the indexing teeth 222 vertically, so that the wheel 2 can be directly assembled on the rotating bracket 22, which is very convenient. Moreover, the displacement generated by the rotating bracket 22 during rotation adjustment can be eliminated by the vertical degree of freedom between the locking teeth 201 and the indexing teeth 222, maintaining the stability of the fit between the wheel 2 and the drive component.

[0048] The grinding wheel 2 is provided with a limiting post 23, and the grinding body 1 is provided with a stop 17. The limiting post 23 and the stop 17 are paired together. The stop 17 serves as the starting point for adjusting the grinding wheel 2. Of course, there can be two stops 17, with the other stop 17 serving as the ending point for adjustment. The limiting post 23 on the grinding wheel 2 cooperates with the stop 17 to control the rotation amplitude.

[0049] The drive assembly includes a knob bracket 3, a drive gear 31 mounted on the knob bracket 3, and a transmission shaft 32 mounted on the drive gear 31. The transmission shaft 32 is rotatably connected to the knob bracket 3. An adjustment knob 33 is mounted on the transmission shaft 32, and a driven gear ring 202 is mounted on the outer wall of the wheel 2. The drive gear 31 meshes with the driven gear ring 202. The adjustment knob 33 can rotate on the knob bracket 3 via the transmission shaft 32. The transmission shaft 32 and the knob bracket 3 can be connected by a hole-shaft fit, or the transmission shaft 32 can be mounted on the knob bracket 3 using bearings. The transmission shaft 32 can drive the drive gear 31 to rotate, and the drive gear 31 meshes with the driven gear, thereby driving the wheel 2 to rotate synchronously. The gear transmission method can better control the rotation amplitude of the wheel 2, allowing any gear plate 211 to be paired with the conductor 12.

[0050] The knob bracket 3 is equipped with a gear pin 34, and the drive gear 31 is equipped with a hysteresis ring 35, which is composed of several concave and convex patterns. The knob bracket 3 is equipped with a return spring 36, which supports the gear pin 34 so that it abuts against the hysteresis ring 35. The concave and convex patterns on the hysteresis ring 35 are correspondingly set with several gear plates 211. That is, when the drive gear 31 rotates at a certain angle, the gear pin 34 slides through the concave and convex patterns on the hysteresis ring 35, generating damping and a sticking sensation. Moreover, the rotation angle of the drive gear 31 and the wheel 2 corresponds one-to-one with the several gear plates 211, so that the indicator scale set on the adjustment knob 33 can correspond to the phase of each gear plate 211.

[0051] 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 ground coffee outlet fine control adjustment device for a coffee grinder, comprising a grinding body (1), a gear assembly and a drive assembly, characterized in that, The gear assembly includes a wheel (2) and a circuit board (21). A centering seat (11) is provided on the grinding body (1). The wheel (2) is rotatably mounted on the centering seat (11). The drive assembly is connected to the wheel (2). The circuit board (21) is disposed on the surface of the wheel (2), and the circuit board (21) is provided with a plurality of gear plates (211); The grinding body (1) is provided with a conductor (12), and when the wheel (2) rotates, the conductor (12) can be electrically connected to any gear plate (211).

2. The ground coffee outlet regulating device according to claim 1, characterized in that Several gear plates (211) are arranged in sequence on the circuit board (21) to form a gear interval, and the center of the gear interval is at the rotation center of the wheel (2).

3. The ground coffee outlet regulating device according to claim 1, characterized in that The circuit board (21) is also provided with an arc-shaped conductive sheet (212), and the arc-shaped conductive sheet (212) and several gear plates (211) are arranged in intervals. The center of the arc-shaped conductive sheet (212) is on the rotation center of the wheel (2). The grinding body (1) is provided with two conductors (12). When the wheel (2) rotates, one of the conductors (12) is always in contact with the arc-shaped conductive sheet (212) and the other conductor (12) can be in contact with any gear plate (211).

4. The ground coffee outlet regulating device according to claim 3, characterized in that The grinding body (1) is provided with a base (13), which is located on one side of the centering base (11). The base (13) is provided with two guide holes (14) along the vertical direction. Two conductors (12) are respectively inserted through the corresponding guide holes (14). The guide holes (14) are provided with elastic elements (15) that support the conductors (12).

5. The ground coffee outlet regulating device according to claim 3, characterized in that A synchronization spring (16) is provided between the two conductors (12), and the end of the conductor (12) that abuts against the stop plate (211) or the arc-shaped conductive plate (212) has a curved surface feature.

6. The coffee grinder powder output precision control device according to claim 1, characterized in that, The gear shift assembly also includes a rotating bracket (22). The inner wall of the lower end of the rotating bracket (22) is provided with a threaded groove (221), and the outer wall of the centering seat (11) is provided with a limiting tooth (110). The limiting tooth (110) and the threaded groove (221) are connected to each other, so that the rotating bracket (22) can be rotatably mounted on the centering seat (11). The outer wall of the upper end of the rotating bracket (22) is provided with an indexing tooth (222). The wheel (2) is a ring structure. The inner wall of the wheel (2) is provided with several locking teeth (201). The wheel (2) is fitted on the rotating bracket (22), and the several locking teeth (201) engage with the indexing tooth (222), so that the wheel (2) and the rotating bracket (22) can rotate together.

7. The coffee grinder powder output precision control device according to claim 6, characterized in that, The wheel (2) is provided with a limiting post (23), and the grinding body (1) is provided with a stop (17). The limiting post (23) and the stop (17) are paired together.

8. The coffee grinder powder output precision control device according to claim 1, characterized in that, The drive assembly includes a knob bracket (3), a drive gear (31) on the knob bracket (3), a drive shaft (32) on the drive gear (31), and the drive shaft (32) is rotatably connected to the knob bracket (3); an adjustment knob (33) is provided on the drive shaft (32), and a passive gear ring (202) is provided on the outer side wall of the wheel (2), and the drive gear (31) is meshed with the passive gear ring (202).

9. The coffee grinder powder output precision control device according to claim 8, characterized in that, The knob bracket (3) is provided with a gear pin (34), the drive gear (31) is provided with a hysteresis ring (35), the hysteresis ring (35) is composed of several concave and convex patterns, the knob bracket (3) is provided with a return spring (36), the return spring (36) supports the gear pin (34) so ​​that it abuts against the hysteresis ring (35).

Images